DEPARTMENT OF MECHANICAL ENGINEERING
SEMESTER - III
WORKSHOP PRACTICLS
SESSION- 2009-10
SUBJECT: - MANUFACTURING PROCESSESS- I
LIST OF EXPERIMENTS
1. Study of Single Point Cutting Tool.
2. Study of Mechanism in Lathe.
3. Practical on Lathe Machine.
4. Study of Mechanism in Milling Machine.
5. Study of Mechanism in Shaping Machine.
6. Study of Mechanism in Drilling Machine.
Experiment No. 01
Aim: - Study of Single Point Cutting Tool
1.1 Introduction
1.2 Designation Of Cutting Tools
(I)
American Standards Association System (ASA)
(II)
Orthogonal Rake System (Ors)
1.3 Tool Geometry
1.4 Tool Signature
1.5 Cutting Tool Materials
1.6 Desirable Properties Of Cutting Tool Materials
Experiment No. 02
Aim: - Study of Mechanism in Lathe
2.1 Introduction
2.2 Working Principle Of Lathe
2.3 Operations Performed On Lathe
2.4 Specification Of Lathe
2.5 Classification Of Lathe
2.6 Mechanisms In Lathe
2.6.1
Flow Of Power From Motor To Spindle
2.6.2
Methods Of Taper Turning
2.6.3
Thread Cutting On Lathe
Experiment No. 03
Aim: - Practical On Lathe Machine (Job Description)
Name of Shop
Name of Job
Raw Material
Material Size
Job Size
Tools Required
: - Machine Shop
: - Turning, Threading and Knurling (JOB ON LATHE)
: - M. S. Round Bar
::: - Single point cutting tool (HSS) , Parting-off tool, Knurling
tool, Drill bit, Tap and tap wrench, Vernier caliper, Steel
rule, V-threading tool, Threading gauges, marking block.
Procedure:Sr.
No.
01
Name of Operation
Operation Performed
Tools Used
Holding and Truing
Marking block and
chuck key
02
Facing
03
Plain Turning
04
Step Turning
05
Drilling and
Tapping
06
Threading
07
Grooving or
Necking
Take a raw material (m.s.round bar)
clamp it in three jaw chuck from one
end and true it from other end so that
it should rotate along the centre of
the chuck.
Carry out facing operation on the
free end of the shaft then reverse the
end and carry out facing to maintain
the required length with the help of
HSS single point cutting tool.
Turn the diameter to the maximum
final job diameter through out the
length.
Make the steps of the required
dimensions according to the given
job sketch
Fix drill chuck in tail stock , insert
drill bit of required size and drill a
hole at the centre of work piece from
free end up to the depth given in the
sketch and then perform taping
operation with required size tap
Engage the lead screw with the cross
slide by operating lever of split nut,
cut an external V- thread of size
specified in the job drawing.
Necking is done on unthreaded
portion according to the job sketch
Single point cutting
tool
Single point cutting
tool
Single point cutting
tool
Drill bit, Tap tool
and Wrench
V-threading tool
Parting tool
08
Taper Turning
09
Knurling
10
Chamfering
after threading
Perform the taper turning operation
by turning compound rest through
the calculated angle
Perform knurling operation on the
portion shown in the sketch. The
purpose of knurling is to provide
effective gripping surface
Chamfer the both ends of the job to
avoid the handling hazard, in
chamfering the sharp edges are
beveled by the angle given in the
sketch ( generally beveled by 450 )
Formula to be used to set taper angle of Compound Rest
Tan θ = D – d / 2 l
Where
θ = Taper angle in degree
D = Bigger diameter of work piece in mm
d = Smaller diameter of work piece in mm
And l = Length of work piece for taper turning in mm
Single point cutting
tool
Knurling tool
Single point cutting
tool
Experiment No. 04
Aim: - Study of Mechanism In Milling Machine
4.1 Introduction
4.2 Working Principle of Milling Machine
4.3 Types of Milling Machine
4.4 Specification of Milling Machines
4.5 Tool Geometry of Simple Milling Cutter
4.6 Operations Performed On Milling Machines
Experiment No. 05
Aim: - Study of Mechanism In Shaping Machine
5.1 Introduction
5.2 Applications of Shaper
5.3 Working Principle of Shaper
5.4 Specification of Shaper
5.5 Types of Shaper
5.6 Quick Return Mechanisms In Shaper
5.6.1 Crank and Slotted Link Mechanism
5.6.2 Withworth Quick Return Mechanism
5.6.3 Hydraulic Mechanism
Experiment No. 06
Aim: - Study Of Mechanism In Drilling Machine
6.1 Introduction
6.2 Types of Drilling Machine
6.3 Specification of Drilling Machine
6.4 Operations Performed On Drilling Machine
6.5 Tool Geometry of Simple Twist Drill
References for All Experiments
1. Workshop Technology Vol. I & II
- S. K. Hajara Choudhury
- A. K. Hajara Choudhury &
- Nirjhar Roy
2. Manufacturing Technology - R. K. Rajput
3. Production Technology - R. K. Rajput
4. Workshop Technology Vol. I & II -Raghuwanshi
5. Production Technology – HMT
Precautions
Precaution to be taken by the students while performing operations on the Lathe
Machine
Every student should follow all safety rules displayed separately in Machine Shop
1. Use of apron is compulsory
2. Sleeves should be rolled up and ring wrist watch, jewelry and neck tie etc. should
be removed
3. The tools should never be placed over lathe ways or carriage
4. The chips should never be removed by hand, wire brush should be use for this
purpose
5. The key should always be removed from the chuck before starting the machine