Translated from Russian to English - www.onlinedoctranslator.com
MINISTRY OF EDUCATION AND SCIENCE OF THE RUSSIAN FEDERATION
federal state budgetary educational institution
higher education
"Togliatti State University"
Institute of Mechanical Engineering
Department of "Equipment and technology of machine-building production"
Direction 15.03.01 "Engineering" Profile
"Technology of mechanical engineering"
FINAL QUALIFICATION WORK
(BACHELOR'S WORK)
_
"Design
vertical milling
CNC" _______________________________________________________________
on the
topic
Student
machine tool
G.V. Kozhevnikov
(I.O. Surname)
(personal signature)
(I.O. Surname)
(personal signature)
(I.O. Surname)
(personal signature)
(I.O. Surname)
(personal signature)
(I.O. Surname)
(personal signature)
Supervisor
YES. Rastorguev
Consultants
N.V. Zubkov
K.Sh. Nurov
V.G. Vitkalov
Allow for protection
And about. head of the department Ph.D.,
associate professor
____________________________ A.V. Bobrovsky
(personal signature)
"_____" ______________________ 2016
Tolyatti 2016
With
MINISTRY OF EDUCATION AND SCIENCE OF THE RUSSIAN FEDERATION
federal state budgetary educational institution
higher education
"Togliatti State University"
Institute of Mechanical Engineering
Department of "Equipment and technology of machine-building production"
APPROVE
And about. head Department ______________ A.V. Bobrovsky
"___" ______________ 2016
EXERCISE
for graduation qualification work
(bachelor's level)
direction of training 15.03.01 "Engineering"
profile "Technology of mechanical engineering"
Student _________Kozhevnikov Gennady Vasilievich __________________gr.__MSB-1203 ____ 1.
Topic _______CNC Vertical Milling Machine Design_ __________________
2. The deadline for the student to submit the completed final qualifying work "" 2016
3. Initial data for the final qualifying work____Materials of undergraduate practice
___________________________________________________________________________
4. The content of the final qualifying work (volume 40-60 pages)
Title page.
Exercise. Annotation. Content.
Introduction, purpose of the work
1) Description of the initial data
2) Machine design
3) Technological part of the work
4) Computer simulation
5) Description of the graphic part of the work
6) Safety and environmental friendliness of the technical facility
7) Economic efficiency of work Conclusion.
Bibliography. Applications: technological
documentation
5. Indicative list of graphic material (6-7 sheets of A1 format)
2
1)Assembly drawing
2) Assembly dimensional analysis
0.5
3) Technological assembly scheme
one
4) Wiring diagram
one
5) Simulation results
0.5
6) Presentation
one
6.Section consultants
___Economic efficiency of work - Zubkova N.V. ____________ ________________
___Safety and environmental friendliness of a technical facility - Nurov K.Sh._______ _ _________
___Norm control - Vitkalov V.G._________________________________________________
7. Date of issue of the task "____" March 2016
Supervisor
qualifying work
high school graduation
Rastorguev D.A.
(signature)
The task was accepted
(I.O. Surname)
Kozhevnikov G.V.
(signature)
(I.O. Surname)
UDC 621.9
ANNOTATION
Designing a CNC vertical milling machine.
Department: Equipment and technologies of machine-building production.
TSU: Togliatti, 2016, 65s., 6 p. A1 format.
The purpose of the thesis is to design the design of a desktop CNC
vertical milling machine.
Based on the analysis of the design of a vertical milling machine,
and the knowledge gained during the training, a model of a desktop CNC
machine was designed.
The effectiveness of the proposed
equipment
confirmed
economic calculation, in addition, environmental safety of work is
ensured.
CONTENT
INTRODUCTION, PURPOSE OF THE WORK…………..…………………………………..……7
1. DESCRIPTION OF INITIAL DATA…………………………………..…….9
1.1 Analysis of the design of a CNC vertical milling machine……….……9
1.2 Machine drives…………………………………………………………..…….12
1.3 Stepper motor control unit………………………………….……17
1.4 Couplings……………………………………………….…….18
1.5 Linear bearings……………………………………………………...19
1.6 Spindle…………………………………………………………………….20
1.7 Software……………………………………………….….22
1.8 Cutting conditions for engraving…………………………………….……..28
2. MACHINE DESIGN…………………………………………..…30
2.1 Selection of structural elements……………………………………………..31
2.2 Dimensional analysis………………………………………………………..…..32
2.3 Choice of cutting tool……………………………………………..36
3. TECHNOLOGICAL PART OF THE WORK………………………………..…37
4. COMPUTER SIMULATION…………………………………..39
5. DESCRIPTION OF THE GRAPHIC PART OF THE WORK…………………………47
6. SAFETY AND ENVIRONMENTAL FRIENDLY OF THE TECHNICAL FACILITY..48
6.1 Structural and technological characteristics of the object……………….48
6.2 Identification of production-technological and operational occupational
risks……………………………………………………………………………………………………………………
48 6.3 Methods and technical means of reducing occupational risks…50
5
6.4 Ensuring fire and technogenic safety of the considered technical
facility (industrial and technological operational and disposal
processes)…………………………………………………..…51
6.5 Ensuring the environmental safety of the considered technical
object………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
7. ECONOMIC EFFICIENCY OF WORK…………………...…56
7.1 Calculation of technological cost…………………………………..58
7.2 Calculation of indicators of economic efficiency of the designed
equipment……………………………………………………………..………………….61
CONCLUSION……………………………………………………………….…63
LIST OF USED LITERATURE……….……………………….64
APPENDICES: technological documentation……………………………….66
6
INTRODUCTION, PURPOSE OF THE WORK
When conducting the educational process, an important place
should be occupied by the combination of theoretical and practical
knowledge. For a deeper understanding of the basics of equipment
control, the product design process will be helpful. In addition, this
machine is designed to develop the acquired knowledge in the field of
design and programming of CNC machines, familiarization with the types
of electric drives and their control. Also, when working with this
equipment, it is necessary to replenish your body of knowledge in this
area and not only. Skills in working in three-dimensional editors (such as
ArtCAM, 3DMAX, etc.) and control programs (MACH3) are required. In
addition, knowledge of control codes (G-codes) is required when writing a
tool motion control program or editing a control program file issued by
ArtCAM.
When developing the model, special attention will be paid to the
simplicity of the layout of structural elements and the simplification of the
electrical circuit for their connection. Since the constituent components
are commercially available, this reduces the cost of the project and opens
up many opportunities for upgrading equipment and expanding its
operating capabilities. This machine can serve as a platform for installing
additional working tools, such as a laser burner and a 3D prototyping tool
(3D printing). This does not require a large number of changes in the
design of the machine, and the inclusion of additional elements in the
electrical circuit requires an additional power supply.
The machine can drill, mill and engrave three-dimensional surfaces.
Materials such as aluminum alloys (with a strength of up to 800 MPa) and
various
7
plastics. The small overall dimensions of the machine, combined with a
large working field, make it available for use in small working rooms and
workshops.
Management is carried out on the basis of a personal computer
with the Windows operating system. The control program MACH 3 was
chosen for control.
The purpose of the thesis is to obtain a finished model of the machine
that meets the specified characteristics. To achieve the goal, it is necessary to
solve the following tasks:
1. Develop the design of a desktop machine with a numerical
software;
2. Select purchased items for the mechanical part of the machine;
3. Select the machine control system;
4. Develop the electrical circuit of the machine;
5. Select purchased items for the electrical part of the machine;
6. Develop a technological process for assembling the product;
7. Perform a static analysis of structural elements (shafts
guides);
8. Perform assembly dimensional analysis;
9. Identify hazards in production and ensure
environmental friendliness of the technical object;
10. Perform the economic justification of the thesis.
In this paper, it is proposed to develop the design and assembly
technology of a three-coordinate milling and engraving machine with
numerical control.
eight
1. DESCRIPTION OF INITIAL DATA.
1.1Analysis of the design of a CNC vertical milling machine.
Machines in this category are designed for milling, drilling,
engraving flat surfaces of a three-dimensional model. Aluminum alloys
(with a strength of up to 800 MPa), as well as various types of plastics,
were chosen as the main materials for processing.
For desktop machines, there are several types of layout:
1. Machines with a movable table;
2. Machine tools with a movable portal.
The first type includes machines in which the portal on which the
cutting tool is installed is stationary. Machines of this type are not very
common, since with a movable table the working area is greatly reduced.
The advantages of this design include the possibility of creating a
rigid portal (when it is fixed on the frame). The ease of implementation of
this design can also be attributed to the advantages.
The disadvantages include the large size of the machine itself
(compared to the design with a movable portal). In addition, when using a
sliding table, it is impossible to process heavy parts.
The second type includes machines in which the portal itself moves
along the X axis. Machines of this type are the most common.
The advantages include a more rigid table (because it is stationary),
and therefore the ability to process heavy parts. The working area is
larger than in the previous version. It is also possible to install a rotary
axis.
9
The disadvantages include a less rigid portal (it is difficult to design
it so that it is rigid and easy to move quickly). Since the portal hangs on
rails, they must have the necessary rigidity. Therefore, to ensure the
desired accuracy, the installation of guides of a larger diameter is
required.
In this paper, the design of the machine with a movable table will be
analyzed (Figure 1.1). The portal is fixed and connected to the frame of the
machine. The workpiece is fixed on the table with clamps. The movement of
the table occurs along the X axis. The movement of the cutting tool along the
Y axis is provided by a carriage fixed in the portal. Changing the position of
the tool along the Z axis is carried out using the appropriate guides located
in the carriage.
When developing the model, [16,19,20] were used.
10
Figure 1.1 - CNC vertical milling machine.
Moving along the coordinates is carried out using stepper motors.
The kinematics of these drives is the same for all three axes and consists
of an electric motor, coupling and screw transmission with a pitch of 1.75
mm.
Drivers (one for each motor) are responsible for controlling stepper
motors. They, in turn, are connected to the optocoupler board, through
which the connection to the computer is made. Power comes from a 48 V
power supply.
Technical characteristics of the machine are presented in table 1.1.
eleven
The main parameter of the machine is its accuracy. Adjustment is
made by adjusting the parameters of stepper motors. The sliding table
design is more difficult to adjust than the gantry machine. In this case, the
resulting accuracy indicator is higher due to the separate calibration of
the table and portal stepper motors.
Table 1.1 - Technical characteristics of the machine.
Machine dimensions, mm
450*450*400
Working area, mm
300*260*100
Table dimensions, mm
350*360
Working speed of movement, mm/min
Up to 1000
Guides
Cylindrical:⌀16 for X and Y axes; and⌀12 for
the Z axis.
Rolling bearings
5А-1000088
Linear bearings
for axes X and Y - SC16UU; for the Z axis SC12UU.
Stepper motors
AD-200-31
1.2 Machine drives
The main movement is the rotation of the spindle with the cutting
tool. As a spindle, standard air- or water-cooled spindles, as well as minimilling machines or engraving-type tools, can be used.
use
Suitable for feed drives
stepper
electric motors (SHD). These motors perform stepless regulation of feed
rates according to the values of the control
12
pulses supplied by the controller (in this case, a computer) through the
driver.
Expediency
applications
stepper
electric motors
subject to several conditions:
-
The ability to control the angle of rotation of the rotor with
impulses supplied to the engine;
-
Ensuring accuracy within 2 - 5% of the step size. Without
accumulation of errors from subsequent steps;
-
Quick start, stop and reverse;
-
Reliable and precise control even in the absence of elements
feedback;
-
Large range of motor speed adjustment.
A stepper motor (Figure 1.2) is an electromechanical device that
converts electrical impulses into linear or angular movements. Most of
them are brushless DC motors. They have high reliability and long service
life. Precise adjustment of the speed of rotation is carried out without
feedback. This machine will use stepper motors AD 200-31. The wiring
diagram is unipolar. The technical characteristics of stepper motors are
presented in Table 1.2.
Since the basic angular step is equal to 1.8 °, 200 steps will occur in one
complete revolution of the motor shaft. In this case, the number of steps taken per
millimeter will be equal to the number of steps per complete revolution divided by
the pitch of the screw. For this gear with a Tr12 screw and a pitch of 1.75 mm, we
get 114 steps / mm.
thirteen
Figure 1.2 - Stepper motor.
Table 1.2 - Technical characteristics of stepper motors AD 200-31.
Phase current, A
2.8
Phase resistance, Ohm
1.5
Inductance, mH
6.8
Torque, kg * cm
31
Moment of inertia of the rotor, g*cm2
840
Weight, kg
1.4
Length, mm
88
Basic angular step, °
1.8
Maximum allowable radial load on the shaft (20 mm from the
flange), N
75
Maximum allowable axial load on the shaft, N
15
14
Figure 1.3 - Dimensions of a stepper motor.
Figure 1.4 - Electrical diagram of stepper motors AD-200-31.
15
Figure 1.5 - Frequency dependence of the torque of a stepper motor
(1/2 pitch crushing, 48V, 100W power supply.)
Figure 1.6 - Frequency dependence of the torque of a stepper motor
(Crushing step 1/2, power supply 24V, 100W.)
sixteen
Figure 1.7 - Frequency dependence of the torque of a stepper motor
(Crushing pitch 1/16, power supply 48V, 100W.)
1.3 Stepper motor control unit
Per
control
stepper
engines
will
answer
programmable control unit SMD - 4.2. the unit is connected in the driver
mode. Connection diagram (Figure 1.8). The controller is the personal
computer itself. The unit is connected to the computer via a USB port.
Communication with the computer must be carried out constantly. For the
correct operation of the unit, it is necessary to install the driver for the
computer's COM port. Since the input current and voltage range of the
driver is between 1.2 ... 4.2 A and 12 ... 48 V, the H100S48 power supply for
48V and 2A will be used.
When developing the electrical circuit, [17,18] were used.
17
Figure 1.8 - connection diagram of the control unit.
1.4 Couplings
Backlash-free flexible couplings will be used to connect the motor
shaft with the screw gear (Figure 1.9). This device is designed to dampen
shocks and shocks when starting and stopping the mechanism. It also
compensates for shaft misalignment. The main advantages of this type of
couplings include the absence of lubricants.
eighteen
Figure 1.9 - Backlash-free flexible coupling.
1.5 Linear bearings
Linear bearings (linear bearings) are a product designed to move
the carriage along a cylindrical guide. With the help of this device, linear
movement along the axis of the shaft is carried out (Figure 1.10).
Consists of two parts:
-moving part in which the closed grooves
balls move (closed grooves inside a linear bearing);
-
The surface of the body on which the movement occurs, in
in this case, a cylindrical shaft.
Instead of bearings, it is possible to use ordinary non-ferrous metal
bushings. However, with the use of such products over time
nineteen
movement inaccuracy increases. This inaccuracy is due to abrasion of the
inside of the bushings over time. Also, when using bearings, the friction
force of the oval is much lower than that of the bushings.
In this work, the main task is to maintain the specified accuracy of
carriage movement along the guides. Therefore, in
designs will apply series linear bearings for shafts⌀sixteen
and series for⌀12 mm.
Figure 1.10 - Movement block (guide + bearing).
1.6 Spindle
As a spindle, different types of tools can be used. Such as handheld engravers and drills with a power of up to 200 W and a maximum
cutter diameter of 3 mm. In addition, small-sized milling machines with a
power of up to 800 W and a cutter diameter of 3–6 mm can be used.
However, the greatest application in machines of this type
twenty
received air-cooled spindles up to 400 W with air cooling. Water-cooled
spindles are not included due to their high cost (compared to previous
options) and the need for a frequency converter and cooling system.
In this work, an air-cooled spindle with an adjustable speed will be
used (Figure 1.11). Spindle power 300W. Operating voltage 48 V (optional
power supply required).
The advantages include low noise and low runout (when
processing wood and various types of plastics). Also in this unit, a
standard collet is installed for a range of cutters from 1 to 7 mm.
The disadvantages include low power (up to 400 W), as well as the
use of an additional cooling system (fan on the engine). Restriction in
processing - only soft materials (some alloys of aluminum and plastic),
which in principle suits the type of materials selected for processing on
this machine.
21
Figure 1.11 - Air cooling spindle.
1.7 Software.
The most common MACH 3 program will be used as a control
program. This product allows processing on machines with up to 5
controlled coordinates. The program allows you to both load files with Gcodes from various editors and enter them manually.
In this example, the ArtCAMPro graphics editor from Delcam was
used (Figure 1.13). For a more visual description, a control program for
engraving the inscription was compiled. The size of the working field of
the inscription is 100 by 100 mm. The workpiece material is aluminium.
The engraving tool is a conical cutter with a diameter of 3 mm.
22
The tool parameters are shown in Figure 1.12. Engraving is done to a
depth of 0.1 mm. The total processing time was 8 minutes 40 seconds
(Figure 1.15).
The control program file is saved in the “.cnc” format, which allows
you to open it in the MACH 3 machine control program. The program
interface is shown in (Figure 1.16).
The MACH 3 program has wide functionality. Through it, the
parameters of stepper motors are configured. In addition, if the machine
has software spindle control, it can also be configured in this program.
There is also an additional tool movement control window (Figure 1.17). In
addition to this, it is possible to edit the text of the control program
directly in the MACH 3 interface. The program also has a special screen
that shows a three-dimensional model of the part and the trajectory of its
processing.
The interface of the MACH 3 program is intuitive and takes a little
time to master.
23
Figure 1.12 - Tool parameters.
Figure 1.13 - The interface of the ArtCAMPro program and the inscription selected for
engraving.
24
Figure 1.14 - Three-dimensional view of the processed inscription.
25
Figure 1.15 - Engraving parameters.
Figure 1.16 – Interface of the MACH 3 program with loaded control
program
26
Figure 1.17 - Tool movement control window.
Table 1.3 - Description of the main commands of the control program.
team number
Team Description
G90
Absolute positioning (counting of all
coordinates, relative to one zero point
in a single system of calculation).
G49
Cancel tool length compensation.
M3 S12000
The direction of spindle rotation is
clockwise.
G0 X42.090 Y31.754 Z5.000
Rapid movement to a given point.
G1 Z-0.100 F60000
Move in a straight line to a specified point
at a specified feedrate.
M05
Spindle stop.
27
1.8 Cutting conditions.
Calculate the cutting conditions for the model shown in the figure
1.13. For the calculations were used [1,3,6,10,11,13].
Engraving is carried out on a workpiece with a size of 100*100*5 mm.
The workpiece material is aluminium.
Tool type - conical cutter R6M5. Tool diameter 3
mm.
sz=0.15 mm/rev;
t=0.1 mm;
V=0.1 mm.
The number of spindle revolutions is found from formula 1.1.
=1000∙ ,r/min;
(1.1)
∙
Since the maximum number of revolutions of the used spindle is
12000 rpm, the maximum cutting speed is (formula 1.2):
= ∙ ∙ =12000∙3.14∙3= 113.04 m/min;
1000
1000
(1.2)
In this case, the value of the main component of the cutting forces (formula 1.3)
equals:
=
10∙ ∙ ∙
∙
∙
28
ℎ
∙
∙ =
=10∙82.5∙0.10.95∙0.050.8∙0.11.1∙2∙ 0.63 = 0.3 N;
31.1∙120000
(1.3)
where - coefficient and x, y, h, q, w - exponents - tabular data,
t is the thickness of the allowance to be removed,
mm; - feed per cutter tooth, mm/tooth;
B- milling width (chip groove width), mm; z is the number
of cutter teeth;
m-
coefficient taking into account the quality of the processed material;
D- cutter diameter, mm;
n- frequency of rotation of the cutter, rpm. where the values of the coefficients and the readings of the
degree are equal:
General correction factor KMPis (formula 1.4):
= ∙ ∙ ∙ = 0.67 ∙ 1 ∙ 0.87 ∙ 1.08 = 0.63;
(1.4)
where, K-R- coefficient taking into account the properties of the material of the workpiece
being processed (formula 1.5); Kvp- coefficient taking into account the cutting speed; K-Rcoefficient taking into account the value of the front angle -; K-R- coefficient taking into
account the magnitude of the angle in the plan -.
=(200 0.3
750
-
29
) = 0.67;
(1.5)
2. MACHINE DESIGN
When designing the machine, the following work was carried out:
-
At the beginning of the work, the main constructive
mechanism dimensions.
-
The most suitable design was chosen.
-
Guide shaft sizes assigned⌀16 for X and Y, and⌀12
-
Selected standard products included in the design of the machine
for Z.
(bearings, fasteners)
-
Added additional elements to enhance rigidity
designs
-
Carriage travel stops installed (safe travel zone)
All structural elements were designed in the KOMPAS 3D program.
In a separate assembly file, the components were combined into a single
mechanism.
When designing, [2,4,7,8,9] were used.
thirty
2.1 Selection of structural elements.
To reduce the cost of manufacturing a machine, it is advisable
use standard products. The selection of elements will be made on
based on the price-quality ratio.
The purpose of this section is to select the purchased parts of the machine.
Let's make a table of purchasing elements (table 2.1). Item prices
are presented in the section "Economic efficiency of work".
Table 2.1 - Purchasing elements.
List of units and parts
Number of components
SD (AD 200-31)
3
Driver (SMD 4.2)
3
Power Supply
one
Optocoupler board
one
Flexible coupling
3
X-axis guides⌀16 (480 mm)
2
Y-axis guides⌀16 (480 mm)
2
Z axis guides⌀12 (250 mm)
2
Screw pair X axis
one
Screw pair Y axis
one
Screw pair Z axis
one
Linear bearings⌀16 mm
eight
Linear bearings⌀12 mm
4
Spindle mount
one
Spindle
one
Guide support
eight
31
2.2 Dimensional analysis.
In this section, assembly dimensional analysis will be carried out.
The desired value is the error of non-parallelism of the Y-axis guides and
the X-axis sliding table (Figure 2.1). In the calculation, we used [14].
Figure 2.1 - Assembly dimensional analysis.
To simplify the solution of the dimensional chain, we will divide the main problem
into several secondary ones.
First, we calculate the asymmetry of the X-axis guides with each
other. For greater clarity, we rebuild the dimensional chain (Figure 2.2).
32
Figure 2.2 - Assembly dimensional chain of asymmetry
X axis guides.
Aone- asymmetry of the mounting holes of the guide support relative to
the mounting holes in the housing for the 1st support;
A2- asymmetry of the mounting holes of the guide support relative to the
mounting holes in the housing for the 2nd support;
A3- asymmetry of the mounting holes of the guide support relative to the
mounting holes in the housing for the 3rd support;
A4- asymmetry of the mounting holes of the guide support relative to the
mounting holes in the housing for the 4th support;
AΔ- asymmetry of the guides of the X axis.
Let's make an equation for the first case (formula 2.1).
33
∆=
√
2
one∙
22∙
2
3∙
2
4,
mm;
(2.1)
Substituting the tolerance values for the linear size in formula 2.1,
we get:
∆=
√4 0.122= 0.24 ∙ √0.01 = 0.024 mm.
Now back to the main task. For greater clarity, we rebuild the
dimensional chain (Figure 2.3).
Figure 2.3 - Assembly dimensional chain.
BΔ1- non-parallelism of the guides relative to the base of the machine;
B∆2- asymmetry of the guides of the Y axis among themselves;
34
B∆3- tolerance for the linear size of the spacers = 0.07;
BΔ4- asymmetry of the guides of the X axis (= AΔ);
BΔ– not parallelism of the guides of the Y axis and the table.
The error from the non-parallelism of the guides relative to the base of the
machine is calculated according to the formula 2.2.
B∆1= √ Bone 2∙ B2
(2.2)
4,mm;
Substituting the tolerance values for the linear size in formula 2.2,
we get:
B∆1= √2 0.1852= 0.185 ∙ √2 ∙ 0.01 = 0.026, mm;
The error from the asymmetry of the guides of the Y axis between themselves
is calculated in the same way as for the X axis (formula 2.3).
B∆2= √ B2∙ 2B2
4,
mm;
(2.3)
Substituting the tolerance values for the linear size in formula 2.3 we
get:
B∆2= √2 0.162= 0.16 ∙ √2 ∙ 0.01 = 0.022, mm;
35
Hence,
desired
from non-parallelism
error
guides of the Y axis and the X table (formula 2.4).
B∆= √ B2
∆1+
B2
∆2+
2
B∆3+2 B∆4, mm;
(2.4)
Substituting the values obtained from the previous formulas, we obtain
the value of the desired error.
B∆= √0.0262+ 0.0222+ 0.072+ 0.0242= 0.082, mm.
2.3 Choice of cutting tool
On this CNC machine, in the manufacture of single parts of a wide
range, it is advisable to use only a standard type tool. The use of a special
or shaped tool is economically unprofitable. When processing products
with relief surfaces, end, end, cone and spherical cutters of the required
diameter should be used. The choice of cutters of various shapes and
configurations will be made according to special catalogs. It is worth
considering that the size of the cutter shanks is limited by the size of the
spindle collet. The diameter of the selected cutters is limited to a range of
1 to 8 mm.
It is also advisable to use cutters with a small long working part of
the tool. An excessive value of this parameter leads to an increase in
vibration during processing.
36
3. TECHNOLOGICAL PART OF THE WORK.
The development process begins with the analysis of the source data. In
this work, the assembly drawing of the machine and its specification will be
used as the initial data. On their basis, a drawing of a technological scheme for
assembling the product was developed. A list of all assembly work is shown in
Table 3.1. During development, [12] was used.
The front panel of the case was chosen as the base part. Also, the
portal carriage assembly was moved to separate node assemblies. In
addition, to facilitate assembly, the nodes connecting the guides and linear
bearings and the nodes of the screw pair are separately taken out. Also, the
spindle mount has been moved to a separate subassembly.
We will make a list of assembly work performed during assembly. Then
we calculate the total assembly time of the product using lookup tables.
In the process of assembling the product, only hand tools will be
used.
Table 3.1 - List of assembly work.
No. Contents of main and auxiliary transitions
Time,tOPmin.
one View body parts
0.28
2
Connect the front panel to the side panels Insert
4.14
3
the rolling bearings into the grooves
0.54
4
Lubricate the X-Axis Guide Assembly Install
0.42
5
the X-Axis Guide Assembly Lubricate the X-
0.16
6
Axis Screw Assembly Install the X-Axis Screw
0.21
7
Assembly Install the Chassis Rear Panel
0.08
eight
Install the Reinforcement Panels Connect the
4.14
9
Left Portal Post to the Chassis
13.8
10
0.96
37
Continuation of table 3.1
Lubricate the Y-Axis Guide Assembly Install the
0.42
12
Y-Axis Guide Assembly Lubricate the Y-Axis
0.16
thirteen
Screw Assembly Install the Y-Axis Screw
0.21
14
Assembly Attach the Right Gantry Post to the
0.08
15
Chassis Install the Gantry Rear Panel
0.96
eleven
4.14
sixteen
17
Install rail supports
eighteen
Connect the back panel of the carriage to the side panels of the
5.52
nineteen
carriage Install the bottom carriage panel
0.18
twenty
Lubricate the Z-Axis Guide Assembly
0.34
21
Install the Z-Axis Guide Assembly
0.16
22
Lubricate the Z-Axis Screw Assembly
0.17
23
Install the Z-Axis Screw Assembly Install
0.08
24
the Top Carriage Panel Install the Stepper
1.38
25
Motor Mounts Install the Flexible
8.64
26
Couplings
0.9
27
Install stepper motors Install
3.36
28
X-axis table
8.52
29
Install Z-axis table Install
8.52
thirty
spindle mount Install spindle
2.4
11.04
31
0.8
Total:
64.83
38
4. COMPUTER SIMULATION
In this section, forces on cylindrical guides will be modeled.
The test object is
guides of the Y axis along which the carriage with the tool moves. It
makes no sense to test guides on the X axis, since the forces affecting
them are small.
The ends of the guide shafts are rigidly fixed in the support on the
housing. The load will be applied along the Z axis. For a more detailed study
of the data obtained, we will divide the shaft into 5 equal sections 84 mm
long. The load will be applied in turn to each of the five sections. Let's start
the test from the extreme left section.
The magnitude of the load is equal to the force with which the carriage presses on
the guides.
Let's build a cylindrical guide in KOMPAS 3D. To apply force to a
certain area of
the surface, we will make small grooves 0.5 mm wide.
Let's set the fastening at the ends of the shaft and set the distributed
force on the first section (Figure 4.1). Let's generate a finite element mesh
on the surface of the part (Figure 4.2). Then we will carry out a static
calculation for the stress and displacement of the shaft (Figure 4.3 - 4.4).
Let's repeat all these steps for each of the five surfaces (Figure 4.5 - 4.12).
Let's build graphs of maximum displacement (stress) relative to the
length of the guide (Figure 4.13 - 4.14).
39
Figure 4.1 - Cylindrical guide with applied forces
(fastening in supports and distributed force on the site).
Figure 4.2 - Generated finite element mesh.
40
Figure 4.3 - Static calculation of stresses in the first section.
Figure 4.4 - Static calculation of displacements in the first section.
41
Figure 4.5 - Static calculation of stresses in the second section.
Figure 4.6 - Static calculation of displacements in the second section.
42
Figure 4.7 - Static calculation of stresses in the third section.
Figure 4.8 - Static calculation of displacements in the third section.
43
Figure 4.9 - Static calculation of stresses in the fourth section.
Figure 4.10 - Static calculation of displacements in the fourth section.
44
Figure 4.11 - Static calculation of stresses in the fifth section.
Figure 4.12 - Static calculation of displacements in the fifth section.
45
Figure 4.13 - Graph of MAX displacement from the length of the guide.
Figure 4.13 - Graph of MAX voltage from the length of the guide.
Conclusion: even with an increased value of the applied force, the
deflection of the guide shaft is within the normal range. For machines of
this class, the maximum value of the sag of the guides is 0.2 mm, the data
obtained correspond to this condition.
46
5. DESCRIPTION OF THE GRAPHIC PART OF THE WORK
The graphic part of this thesis consists of 6 sheets (including 1 sheet
of the application). The drawings are presented in A0, A1 and A2 format.
Drawing structure:
1. Assembly drawing in A0 format (in this drawing
the main types and sections of the machine are presented, the overall and
connecting dimensions are affixed, positions are affixed) and the specification for it
(see Appendix A);
2. Assembly dimensional analysis in A2 format (view
dimensional chain);
3. Technological scheme of the assembly in A1 format (the process is shown
assembly of the device with the main recommendations for it) and the
technological map for it (see Appendix B);
4. Wiring diagram in A1 format (wiring diagram
electronic components of the CNC machine);
5. Simulation results in A2 format (graphic data,
obtained during static testing of guide shafts).
The presentation poster provides basic information on the thesis,
as well as demonstrative illustrations.
47
6. SAFETY AND ENVIRONMENTAL FRIENDLY TECHNICAL
OBJECT
6.1 Structural and technological characteristics of the object
The initial data on the technological process are listed in the table
6.1. When filling out the section, [5] was used.
Table 6.1 - Technological passport of the object.
Technological
process
Technological
operation, type
performed
works
TP
Procurement
Name
positions
worker,
performing
technological
Equipment,
device,
adaptation
materials,
Locksmith
Circular Saw
Plywood
process,
operation
design
TJET JTS-700L
vertically
400V
milling
Drilling
Operator
substances
drilling
machine
machine tool
ALZSTAR 18
T/S
Control
Controller
Calipers
-
Assembly
Locksmith
Workbench
-
6.2 Identification of production and technological and operational
professional risks
The possible occurrence of dangerous and harmful factors was taken into account
and is given in Table 6.2.
48
Table 6.2 - Identification of occupational risks.
Productiontechnological
Source of a dangerous
and / or harmful
production factor
Dangerous and / or
harmful production factor
and/or
operationaltechnological
operation, type
work performed
procurement
cars
moving
andsaw blade
mechanisms
Application
Current in the electrical circuit of the
electrical equipment, the
machine
closure of the electrical circuit of
which can pass through the
human body
Sharp edges on the surface of
tools,
roughness
burrs
Surface
cutting
andtool
on the surface
blanks
Drilling
cars
moving
andRotating
mechanisms
spindle
machine tool
Increased
View
dustiness
processed
material
working area
Increased
temperature
Interaction of tool and
equipment
workpiece surfaces
Application
Current in the electrical circuit of the
electrical equipment, the
machine
closure of the electrical circuit of
which can pass through the
human body
Sharp edges on the surface of
tools,
roughness
burrs
Surface
cutting
andtool
on the surface
blanks
Control
-
-
49
6.3 Methods and technical means to reduce occupational risks.
In this section, measures were assigned to prevent hazardous
production factors. In addition, personal protective equipment for
working personnel was selected. All information is entered in table 6.3.
Table 6.3 - Methods and means of reducing the impact of hazardous and
harmful production factors
Dangerous and / or
harmful production factor
Organizational methods
and technical means
Worker's personal
protective equipment
protection, reduction,
moving cars and
elimination of a dangerous
and / or harmful production
factor
Carrying out timely
Overalls for protection against
mechanisms
briefing, the use of
pollution and mechanical
enclosing elements
impacts, boots with
protective toe cap
Application
Application of reliable
electrical equipment,
insulation materials
the closure of the electrical
wiring,
circuit of which can
application
pass through the body
safety devices
Rubberized gloves
human
Increased
Application of funds
Personal respiratory
dustiness of the working
air ventilation
protection
(PPE), goggles
zones
The use of dust
collection devices
Elevated temperature
Application of funds
equipment
air cooling
50
-
6.4 Ensuring fire and technogenic safety of the considered
technical object (production and technological operational
and disposal processes).
The main condition for the safe work of personnel is the availability
of a reliable fire safety system. For the competent assignment of safety
equipment, it is first necessary to identify the hazards in a fire (Table 6.4).
Taking into account the information received, we will select the
main technical means of fire safety (table 6.5). In addition to this, we will
assign organizational and technical measures for personnel (table 6.6).
Table 6.4 - Identification of classes and fire hazards.
Plot,
subdivision
Equipment
Procurement
Circular Saw
drilling
Class
fire
V
drilling
machine
Control
factors
fire
manifestations
fire factors
Flames and sparks
fragments,
high
ruined
temperature,
object,
selection
destruction
poisonous
wiring,
vapor
Calipers
Related
Dangerous
at
harmful emissions
combustion
substances in the process
fusible
combustion, emissions
substances.
harmful substances in
process
firefighting.
Assembly
Workbench
51
parts
Table 6.5 - Technical means of ensuring fire safety.
Primary
s
facilities
fire
ears
Mobile
nye
facilities
fire
ears
Station
ary
installation
and
systems
fire
ears
Facilities
fire department
th
automatic
ki
Fire
noe
Facilities
individual
equipment
ual
ovation
protection
and
salvation
Fireman
tool
fire engine
(mechanized
s
signaliz
bathroom and
ation,
non-mechanism
connection
roved)
notify
nie.
Sovkovskaya
Machine
people
and
Sand,
fire brigade
Aerosol
System
Fire
at
fire
Contra
powder
I am
naya
managed
ny
gases,
shovel,
ic
out
motorop
system
and I
closet
respirate
bucket, hook
installation
fire extinguisher
pa
fire
fire
ears
by the way
tel.
ora
a
fire department
th
signaliz
ation
Table 6.6 - Organizational (organizational and technical) measures to
ensure fire safety.
Name
technological process,
technical facility
equipment
Name of species
implemented
Fire safety requirements,
realizable effects
TP design
organizational
(organizational
technical)
activities
Fire organization
vertical milling
security, instruction
concentration of flammable
machine tool
employees for
substances, timely
actions during
disposal
fire, definition
flammable
flammable substances
waste
and the choice of rules for
their storage
52
Monitoring the
6.5 Ensuring the environmental safety of the considered
technical object.
The main objective of this section is to ensure the environmental
safety of the selected object. To do this, it is necessary to identify the
environmental factors of the object (Table 6.7). Based on the data
obtained, we will assign measures to reduce the negative impact on the
environment (Table 6.8).
Table 6.7 - Identification of environmental factors of a technical object
Name
technical
object,
technological
process
Structural
constituents
technical
object,
technological
process
(production
building
or
structures
on
functional
Impact
technical
object
atmosphere
on the
Impact
technical
object
hydrosphere
on the
and(forming
wastewater,
emissions
v water intake from
surrounding
sources
Wednesday)
water supply)
(harmful
dangerous
appointment,
Impact
technical
object on
lithosphere
(soil,
vegetable
cover,
bosom)
(education
waste,
excavation
technological
fertile
soil layer,
alienation
lands,
violation and
pollution
vegetable
operations,
equipment),
energy
installation
transport
remedy, etc.
about cover and
TP
Woody
design
dust,
waste
vertically
emerging
form
milling
in progress
woody
machine tool
processing
dust
53
-
etc.)
Education
v
Table 6.8 - Developed organizational and technical measures to reduce
the negative anthropogenic impact of a technical facility on the
environment.
Name
technical
object
Events
decrease
negative
anthropogenic
impact
atmosphere
Events
decrease
negative
anthropogenic
impact
hydrosphere
Events
decrease
negative
anthropogenic
impact
TP for designing a vertical milling machine
on Installation of special hoods with a filtration system for air purification
before being released into the atmosphere
on the
on No impact on the hydrosphere
on the
on Chip collection with subsequent shipment to a scrap metal
collection point
on the
lithosphere
Conclusions:
1. In the section "Safety and environmental friendliness of a technical facility"
the characteristics of the technological process of manufacturing parts of
a vertical milling machine are given, technological operations, positions of
employees, production and technical and engineering equipment, used
raw technological and consumables, components and manufactured
products are listed (table 6.1).
2. Occupational risks were identified by
carried out technological process (table 6.2).
3. Organizational and technical measures have been developed for
reduction of professional risks. Personal protective equipment for personnel
has been selected (Table 6.3).
54
4. Measures have been developed to ensure fire safety
technical object. Identification of the class of fire and fire hazards and the
development of means, methods and measures to ensure fire safety was
carried out (Table 6.4). Means, methods and measures for ensuring fire
safety have been developed (Table 6.5). Measures have been developed to
ensure fire safety at the technical facility (Table 6.6).
5. Environmental factors identified (Table 6.7) and
measures have been developed to ensure environmental safety at the
technical facility (table 6.8).
55
7. ECONOMIC EFFICIENCY
In this section, the calculation of the economic efficiency of the work
will be carried out. [15] was used in the calculation.
To calculate the capital investment in the product, we sum up the
total cost of parts and catch, assembly costs and design costs.
Table 7.1 - List of input parts and assemblies.
List of nodes and
details
SD (AD 200-31)
Driver (SMD 4.2)
Power Supply
Optocoupler board
Flexible coupling
guide axle
X⌀16 (480 mm)
guide axle
Y⌀16 (480 mm)
guide axle
Z⌀12 (250 mm)
Screw pair X axis
Screw pair Y axis
Screw pair Z axis
Linear
bearings⌀16 mm
Linear
bearings⌀12 mm
Fastening
spindle
Spindle
Support
guides
Additionally
(fixing
Number of components
Price for 1 unit
3000
4000
1500
300
400
Price per
necessary
set
9000
3
3
one
one
3
2
1200 (for 1m)
1500
300
1200
1200
2
1200 (for 1m)
1200
2
1100 (for 1m)
1100
eight
600
600
300
450
600
600
300
3600
4
300
1200
one
1400
1400
one
4000
250
4000
2000
-
500
one
one
one
eight
-
12000
elements,
connecting
wires, etc.)
Total:
41700
Assembly costs (PSat):
56
RSat-TSat-WITHhour-TOD--one-TOWITH--1.1-66.71-1.08--1-0.3--103.1rub. (7.1)
Where:TSat- the complexity of assembly and installation, n-hours;WITHHOUR– average hourly
the tariff rate of workers engaged in dismantling;TOD- coefficient,
taking into account additional payments to the hourly, daily and monthly payroll
fees;TOWITH– coefficient taking into account contributions for social needs.
Design costs:
WETC-TTR.ETC-WITHH.THOSE-564.1 - 77.55 - 43745.96,rub.
(7.2)
where:WITHCH.TECH– hourly salary of a designer, technologist:
WITHH.THOSE
-
SalaryCONST-TECHN-
-
DR.MES-TCM
14000
22-8
-77.55,rub. /hour
(7.3)
where:TCM=8- duration of the work shift;SalaryCONST(TECHN)- monthly salary of
a designer, technologist;DR.MES=22- the number of working days month.
Summing up the values from the previous formulas, we obtain the value of
the total capital investment in the product.
TOOVR-WITHD-RSat-WETC-41700 -103.1 - 43745.96 - 85549.06,rub. (7.4)
57
7.1 Calculation of technological cost
M-MW-CMAT-TOTK-MOTH-COTH,rub.
-T
WPL.H.BAZ.-
-WITH
PC
WPL.OP.BAZ.-
60
WITHCHN-FER-H
(7.5)
-TOAt-TOPF-TOETC-TOD-TOVN-TOH,rub.
H
-TOW.SR-TOAt-TOPF-TOETC-TOD-TOH,rub. P
G-HOBSL
ABOUT.OVR
(7.6)
(7.7)
(7.8)
HPAP.-(WPL.OP-WPL.H)-TOWITH,rub.
m
--CABOUT--TOMONT-one--VR ABOUT--HABOUT-TOW
.
RR.ABOUT.BAZ.-
one
FE-60-TOVN
-TOR,rub.
(7.9)
m
R A.BAZ.-
--CABOUT--TOMONT-one--VR.ABOUT--HABOUT-TOW one
FE-60-TOVN-one hundred
-HA.rub.
(7.10)
m
RE.BAZ.-
-one
M
-TMASH
At
efficiency-60
-TOOD-TOM-TOV-TOP-C,rub
E .
58
(7.11)
RAND-
-m(C-
AND
-TOTR-VR.AND)-TOUB-WITHPER--T
TAND--HPER-one- -60
one
MASH
(7.12)
, rub.
m
-HABOUT-RUD-TOW-TOD PL
.
RPL-
PG
m
RAt.ETC-
-
WPR.
one
-TOW-
one
H DET- TO
PG-TPER
(7.13)
-C.PLE,rub.
V.ETC
(7.14)
,rub.
RE.ABOUT-RR.ABOUT-RA-RE-RAND-RCM-RV-RSJ-RPL-RAt.ETC,rub.
(7.15)
Using the described methodology (formulas 7.5 - 7.15), we obtain the
following values, which are presented in table 7.2.
Table 7.2 - Values
No.
one
2
3
4
5
6
7
eight
9
10
eleven
of the parameters of the technological cost.
The name of indicators
main materials excluding waste, rub.
basic salary of working operators, rub.
Basic salary of a fitter, rub.
payroll, rub.
Expenses for current repairs of equipment, rub.
equipment depreciation expenses, rub.
expenses for technological energy, rub.
tool expenses, rub.
expenses
on the
content
and exploitation
production area, rub.
expenses for the supply and operation of control
programs for CNC machines, rub.
Total expenses for the maintenance and operation of
equipment, rub.
59
Indicator values
726.03
4.72
0.36
1.73
0.02
0.004
0.012
0.26
0.29
0.39
1.036
Table 7.3 - Calculation of the cost of processing a part.
No.
Costs, rub.
Expenditures
Project
one
2
3
one Materials minus waste:M
0.9
2
5.08
The basic salary of working operators and adjusters:
WPL.DOS-WPL.OP-WPL.H
WPL.DOS-ETC--4.72 - 0.36 - 5.08
3
4
Payroll accruals:
1.73
HW.PL
Equipment maintenance and operation costs:
RE.ABOUT
1.036
8.75
Total technological cost:
WITHTHOSE-M-WPL.DOS-HW.PL-RE.ABOUT
5
8.74
General overhead costs:
RSHOP-WPL.DOS-TOSHOP
RSHOP-ETC--5.08 -1.72 - 8.74
Total shop cost:
17.49
CSHOP-WITHTHOSE-RSHOP
6
Factory overhead:
10.01
PHEAD-WPL.DOS-TOHEAD
RHEAD-ETC--5.08 -1.97 -10.01
27.5
Total factory cost:
CHEAD-WITHSHOP-RHEAD
7
0.08
Non-manufacturing expenses:
RVN-WITHHEAD-TOGNP
RVN-ETC--27.5 - 0.003 - 0.083
Total total cost:
27.58
WITHFLOOR-WITHHEAD-RVN
60
7.2 Calculation of indicators of economic efficiency of the projected
technology.
Pcoolant-EUG-WITHFLOOR-BA3--R-PG,rub.
(7.16)
Pcoolant-EUG-27.58 - 0.2 -10000 - 55160,rub.
HPRIB-Pcoolant-TONAL,rub.
(7.17)
HPRIB-Pcoolant-TONAL-68950 - 0.2 -11032,rub.
PCLEAN-Pcoolant-HPRIB,rub.
(7.18)
PCLEAN-Pcoolant-HPRIB-55160 -11032 - 44128 ,rub.
TOK.CALC-
TOBB.ETC-one,of the year
PCLEAN
TOBB.ETC-TOOLSH-85549.06,rub.
TOK.CALC-
85549.06
44128
61
-thirteen,of the year
(7.19)
DDISK GENERAL
.
-PCLEAN.DISK-T-
T
--PCLEANone
one
, rub.
t
-one-E-
(7.20)
DDISK.OVR-44128-0.87- 44128-0.756- 44128-0.658 -100788.35,rub.̀
(7.21)
EINT-NPV-DOVR.DISK-TOBB.ETC,rub.
EINT-NPV-100788.35 - 85549.06 -15239.29,rub.
ID-
ID-
DOVR.DISK,rub.
TOBB.ETC
100788.35
85549.06
-1.17,rub.
62
rub.
rub.
(7.22)
CONCLUSION
In this final qualifying work, the following points were fulfilled:
1) The design of the desktop engraving and milling machine has been developed
machine;
2) Selected elements of mechanical and electrical
components of the machine;
3) The scope of this equipment is determined;
4) Product management software selected;
5) A 3D model of this machine was designed in the Compass program
3D;
6) A technological process for assembling the product has been developed;
7) The error of the main structural elements is calculated
the method of dimensional chains;
8) A weak point in the design was identified - the deflection of the guides
axes Y. The static analysis of this element is made;
9) Classified and analyzed sources of environmental
hazards and methods for their elimination;
10) The calculation of the economic efficiency of the object was made.
63
BIBLIOGRAPHY
1. Dalsky A. M. Handbook of a technologist - machine builder, in 2
volumes. Ed. Dalsky A. M. M.: Mashinostroenie, 2003. - vol. 1 - 912s., vol. 2
- 944s.
2. Sobolev S.F. Guidelines for the development of technological processes
for the manufacture of parts by machining / S. F. Sobolev, Yu. P. Kuzmin. St. Petersburg: SPbGU ITMO, 2007. - 118p.
3. Baranovsky Yu. V. Modes of cutting metals / Yu. V. Baranovsky. - 3rd ed.
- M., Engineering, 1972
4. Gorbatsevich A. F. Course design for engineering technology:
[Ucheb.Posobie for mechanical engineering. specialist. Universities]/ A. F.
Gorbatsevich, V. A. Shkred. – 4th ed., revised. and additional - Mn: Higher.
school, 1983.- 256s., ill.
5. Gorina LN Ensuring safe working conditions in production. Proc.
Benefit. - Tolyatti, 2000, 68 p.
6. L. G. Bagromov, Kolokatov A. M. Calculation of cutting conditions
during milling. - M.: MGAU, 2000. - XX p.
7. Dobrydnev I. S. Course design on the subject "Technology of mechanical
engineering" / I. S. Dobrydnev. - M .: Mashinostroenie 1985, - 184 p., ill.
8. Matveev V. V. Design of economic technological processes in mechanical
engineering / V. V. Matveev, F. I. Boikov. - Chelyabinsk: Yuzh.-Ural. book. publishing
house 1979. - 111 p., ill.
9. Reference technologist - machine builder. In 2 vols. T. 1.2 / Ed.
Kosilova A. G. and Meshcheryakova R. K. - 4th ed. Revised and add., M:
Mashinostroenie, 1985, 656 p., ill.
10. Nekrasov S. S. Processing of materials by cutting / S. S. Nekrasov. - M.:
Agropromizdat, 1988. - 336s.
64
11. Kuznetsov Yu. I. Equipment for CNC machines: a Handbook / Yu. I.
Kuznetsov, A. R. Maslov, A. N. Baikov. - M .: Mashinostroenie, 1990. - 510s.: ill.
12. Novikov MP Fundamentals of assembly technology of machines and mechanisms / MP
Novikov. – M.: Mashinostroenie, 1980. – 592 p.
13. Bobrovsky A.V. Cutting non-ferrous metals: a Handbook / A. V. Bobrovsky,
O. I. Drachev, A. V. Rybyakov. - St. Petersburg: Polytechnic, 2001. - 200 pp.: ill.
14. Bulychev V. A. Calculation of assembly dimensional chains. Guidelines
for practical exercises on the course "Technology of the industry". Tolyatti.
– 1996
15. Zubkova N.V. Educational and methodological manual on the
implementation of the economic section of the final qualification work for
students studying in the direction of training 15.03.05 "Design and
technological support of machine-building industries." / N.V. Zubkov Togliatti: TSU, 2015. - 73p.
16. Pabla, BS CNC Machines / BS Pabla, M. Adithan. - New Age
International, 1994. - 107 p.
17. Smid Peter CNC Programming Techniques / Peter Smid, – 1 th ed. -Industrial
Press, Inc., 2005. - 360 p.
18. Peterson, Michael J.CNC Programming: Basics & Tutorial /Peterson, Michael
J. - CreateSpace Independent Publishing Platform, 2008. - 234 p.
19. Overby, Alan. CNC Machining Handbook: Building, Programming, and
Implementation / Overby A. – 1 th ed. - McGraw-Hill Education TAB, 2010. - 272
p.
20. Kelly, James F. Build Your Own CNC Machine / Kelly James F., Hood-Daniel
P., - Apress, 2009. - 240 p.
65
Applications:
technological documentation
66
Annex A
67
68
Annex B
Total sheets __4 ___
Tool
Norm
worker
time in
Equipped.
To collect.op.
(knots) and number
in them, act.
Content of transitions
Sheet No. _____one _____
one
16.07.646.03
Part No.
number of transitions
operation number
FULL NAME. ____G.V. ____
Annual release of knots
No. of assembly drawing
Department of OTMP
StudentKozhevnikov
Assembled unit: CNC vertical milling
machine.
Adapt.
Institute
mechanical engineering
minutes
subassembly
05
Assembly of the rail assembly
X axis
one Lubricate the X axis guides. 8/2
2
10
Install
bearings.
linear
Workbench
36/2
0.21*2
0.08*2
-0.58
Assembly of the rail assembly
Y axis.
one Lubricate the Y axis guides. 9/2
2
15
Install
bearings.
linear
Workbench
36/2
0.21*2
0.08*2
-0.58
Assembly of the rail assembly
Z axis.
one Lubricate the Z axis guides. 10/2
2
Install
bearings.
linear
Workbench
36/2
0.17*2
0.08*2
-0.50
Assembling the screw pair assembly
twenty
X axis.
one Lubricate the X-axis screw.
2
Install the spindle nut.
25
Group:MSB-1203
Technological map of the assembly of a CNC
vertical milling machine.
Product name: CNC vertical milling
machine.
Counter.
TSU
12/1
15/1
Workbench
0.21
0.08
-0.27
Assembling the screw pair assembly
Y axis.
one Lubricate the Y-axis screw.
2
Install the spindle nut.
Developed
13/1
15/1
Workbench
checked
Approved
0.21
0.08
Sheet
Sheets
69
-0.27
one
4
Tool
Norm
minutes
Counter.
Adapt.
worker
time in
Equipped.
To collect.op.
(knots) and number
in them, act.
Part No.
number of transitions
operation number
Content of transitions
Assembling the screw pair assembly
thirty
Z axis.
one Lubricate the Z-axis screw.
2
Install the spindle nut.
35
14/1
15/1
0.21
0.08
Workbench
Case assembly
machine tool
one Inspect housing parts
2
Press rolling bearings
into grooves.
3
Install front
case panel.
4
Fasten the screws
5
Attach side
6
7
panels and tighten the
screws completely.
Attach node
X axis guides.
Attach node
screw pair of the X axis. Screw
eight
9
10
eleven
on the screws of the rear
case panels.
Attach rear
panel and tighten the
screws completely.
Fasten the screws
Join
reinforcing panels and
Workbench
27/6
Molo
current
1/1
30/6
2/2
open
-0.27
0.28
0.09*6
0.07
0.59*6
0.1*6
weaving
cross
8/2
new
0.1
12/1
0.1
30/6
0.59*6
3/1
0.1*6
30/20
4/2
0.59*20
0.1*20
28/2
0.1*2
5/1
0.38*2
9/2
0.1
13/1
0.1
28/2
0.1*2
tighten the screws
12
thirteen
14
15
sixteen
Developed
finally
Install the bolts on the
left side pillar.
Attach the levub rack and
tighten the bolts
finally
Attach node
Y-axis guides.
Attach node
screw pair of the Y-axis. Screw
on the screws on the right
side pillar.
checked
Approved
Sheet
Sheets
70
2
4
eighteen
nineteen
21
40
one
2
3
4
5
6
7
45
Norm
minutes
Counter.
Adapt.
worker
time in
Equipped.
To collect.op.
(knots) and number
Tool
Attach right
6/1
0.38*2
Install the screws on the rear
panel of the portal.
30/8
0.1*8
7/1
0.38*8
11/8
0.1*8
32/16
0.59*16
rack and tighten the bolts
completely.
Join
back
portal panel and tighten the
screws completely.
twenty
in them, act.
Part No.
number of transitions
operation number
17
Content of transitions
Install
guides.
supports
Tighten the screws
Assembling the Y-Axis
Carriage. Install the rear panel of
-39.37
19/1
Workbench
the carriage.
Fasten the screws.
open
0.07
weaving
30/18
20/2
0.59*18
0.1*10
Attach bottom
21/1
0.1*4
Attach node
Z-axis guides.
Attach node
screw pair of the Z axis.
Attach the top
10/2
0.1
14/1
0.1
22/1
0.1*4
Join
lateral
carriage panel and tighten
the screws completely.
carriage panel and tighten
the screws completely.
carriage panel and tighten
the screws completely.
-12.69
Assembling the stepper assembly
engine.
one Install SD mount. Fasten
2
the screws.
3
Connect SD and
18/1
Workbench
32/2 31/4
open
weaving
17/1
0.07
0.59*4
0.1
tighten the screws
4
5
Developed
finally.
Attach elastic
coupling to the SD shaft.
Tighten the coupling.
16/1
0.1
30/1
0.1
checked
Approved
Sheet
Sheets
71
-3.36
3
4
55
Assembly of the spindle assembly.
one Install mount
spindle.
2
Fit the bolts.
3
Set the spindle to
landing hole.
4
Tighten the bolts
finally.
4
5
6
7
eight
9
10
eleven
Workbench
Gaechn
th
key
33/4 35/2
minutes
Counter.
worker
Adapt.
Equipped.
To collect.op.
Norm
time in
26/1
0.1
0.59*6
0.1
0.1*6
-4.34
on the
Workbench.
Install the Y-axis carriage
assembly.
1/1
Workbench
open
weaving
19/1
0.2
0.2
Tighten
screws
finally.
Install X-axis table.
Tighten
screws
finally.
Install Z-axis table.
Tighten
screws
finally.
Install Node
stepper
32/16
0.5*16
23/1
0.1
24/1
0.1
18/3
0.2*3
Tighten
finally.
31/12
0.59*12
25/1
33/4
0.2
assembled engine.
screws
Install the spindle assembly.
Tighten
bolts
finally.
Developed
(knots) and number
25/1
General assembly.
3
Tool
33/4 35/2
one Install case
2
in them, act.
Part No.
number of transitions
operation number
50
Content of transitions
32/16
0.5*16
32/16
0.5*16
0.59*4
checked
Approved
72
-34.84
Sheet
4