Fontys University of Applied Sciences Manual of Engineering Drawing Workbook MEA CM1-P1 & MEA CM1-P2 E. Rutjens spring 2015 (Dutch version) O.van Buul, summer 2015 (adapted English version) C. Sleeuwenhoek summer 2017 (adapted and equalized Dutch <> English versions) W. Witteman, Fall 2020 version: 2020, Nov 22 Content: MEA CM1-P1 1. 2. 3. 4. 5. 6. 7. Isometric drafting Projection methods Lines types and styles Dimensioning Sectional views Threads Threaded Fasteners Page 3 Page 8 Page 9 Page 10 Page 12 Page 13 Page 15 Content MEA CM1-P2 1. 2. 3. 4. 5. 6. 7. Introduction Horizontal Stirling Engine Upper and lower limits ISO Limits and fits Surface Texture Geometrical tolerances Tolerances Stacking Evaluation Horizontal Stirling Engine 2 Page 16 Page 17 Page 20 Page 23 Page 27 Page 29 Page 30 MEA CM1-P1 Lesson 1 : Isometric drafting Exercise : 1 Relation to Manual of Engineering Drawing (Chapter 6 page 61-62) Draw an isometric sketch of the following figure. Keep the advised paper layout, see lower part of the page. You must make two isometric drawings scale 1:1. The upper sketch is the complete figure. The lower part is a cut out drawing only ¾ is visible from the upper sketch. As paper format we use A4. 3 4 1. Third angle projection Exercise :1 Relation to Manual of Engineering Drawing (Chapter 6 Figure 6.25 page 69) Draw the missing views in the figure below. (Third Angle) 5 Exercise 2 : Relation to Manual of Engineering Drawing (Chapter 6 Figure 6.23 page 67) Draw the missing views in the figure below. (First Angle) See also Chapter 6 page 49 6 Exercise 3 : Mixed exercises third angle and first angle projection. First select the type of projection and add/complete the missing views in the drawing. 7 Exercise 4 : 2D projection Make a 2D drawing of the picture below. Use third angle projection. The drawing must consist of 3 views. Add dimension in these views. Place the dimensions correctly. Scale for the drawing 1:1. Use A4 as size of the paper. 8 MEA CM1-P1 Lesson 3 : Line Styles and Types. All CAD applications contain possibilities to adjust line-types if needed. This will in most cases be done by the application manager. Every organization can choose their own preferred settings. In this case the settings came straight from the default installation. Scan through the Drafting Preferences of your own NX installation open the tree and view all possibilities. (leave preferences by “cancel”) 9 MEA CM1-P1 Lesson 4 : Dimensioning Exercise 2.6 Part 2.6 Draw the part (in mm) as shown scale 1:1 Include the Top view Put in all dimensions in the right position 10 Exercise 2.5 Part 2.5 Draw the part (in mm) as shown scale 1:1 Include the Top view Put in all dimensions in the right position 11 MEA CM1-P1 lesson 4 : Sectional views Exercise 1 : Section View Make a 2D drawing of the figure below. Make use of the intersections A-A and B-B as indicated in the figure. The views drawn should be: Top view Front view of intersection A-A (start with this one in de middle of your sheet) Right side view of intersection B-B Scale of the drawing is 1:1 Paper format is A4 landscape. Dimension the drawing appropriately. 12 MEA CM1-P1 Lesson 5: Threads Exercise 4.3 Part 4.3 A Fill in the following dimensions : a = _______ b = _______ c = _______ d = _______ B Fill in the following diameters : P = _______ Q = _______ C Which type of thread is applied on the outside of the bush : ________ D 1 Outside diameter = __________ 2 Core diameter = __________ 3 Pitch = __________ E 1 How wide is the thread runout = __________ 2 What is the maximum diameter of the runout = __________ F What is the angle of the collar chamfer = __________ G How many slots does the collar have = __________ H What is the function of these slots = _________________________________ I How is a section view like the A-A view called = ____________________________ 13 14 Exercise 4.2 Part 4.2 A Fill in the following dimensions : (See the applicable standards) a = __________ g = __________ m = __________ s = __________ b = __________ h = __________ n = __________ t = __________ c = __________ i = __________ o = __________ u = __________ d = __________ j = __________ p = __________ v = __________ e = __________ k = __________ q = __________ f = __________ l = __________ r = __________ B Fill in the exact description of the fasteners according to the applicable standards. (Or use the manufacturers internet sites as mentioned in Lesson 7) A = _________________________________________ B = _________________________________________ C = _________________________________________ D = _________________________________________ E = _________________________________________ 15 MEA CM1-P1 Lesson 7: Threaded Fasteners In groups, What can you buy and where. Scan the links on the internet. How it’s made Producers http://www.unbrako.com https://www.nedschroef.com http://www.stanleyengineeredfastening.com/brands/pop-avdel https://www.southco.com http://www.pemnet.com/ Suppliers https://www.fabory.com/nl https://www.jeveka.com/nl How it’s made https://www.youtube.com/watch?v=3kxcw08p_oY https://www.youtube.com/watch?v=UrWs9AFWjsk ned. ondertitel https://www.youtube.com/watch?v=DAOg4_FwOCg groot spul 16 MEA CM1-P2 Lesson 1 : Introduction Horizontal Stirling Engine The Horizontal Stirling Engine lets you put into practice what you have learned in period 1. The use of sketches and constraints. The use of features like holes, revolves, extrudes and patterns. Create 3D models using CAD application NX and the drawings of handout Horizontal Stirling Engine. Work in a way that groups of the same entities are kept together in the feature tree. (sketch > feature and possibly corresponding patterns) See to it that all auto dimensions are turned off. Always use fully constrained sketches. Hand in every week according to schedule. A schedule will be provided by the teacher. For content see Handout. 17 MEA CM1-P2 Lesson 2: Upper and Lower Limits http://www.mitcalc.com/doc/tolerances/help/en/tolerancestxt.htm http://en.wikipedia.org/wiki/Engineering_tolerance http://www.wisetool.com/fit.htm Exercise 1: Fill in the table Relation to Manual of Engineering Drawing Deviation see page 283 Nominal Dimension Dimension 15 36 55 43 52 60 75 82.5 110 Upper Deviation Lower Deviation + 0,5 + 0,2 + 0,15 0 0 - 0.2 - 0.10 - 0.25 + 0.10 - 0.10 + 0.01 +0.005 + 0.015 - 0.015 + 0.10 - 0.25 0 -0.015 Ø 25 ± 0.25 Ø 32 ± 0.015 Table 1 18 Tolerance Pos. = 1 Neg. = 2 Both = 3 Total Tolerance Unilateral = 1 Bilateral = 2 Exercise 2: Fill in the table Shaft dimension Hole dimension Ø 15.0 Ø 15.3 Ø 25.3 Ø 25.5 Ø 31.75 Ø 32.01 Ø 44.75 Ø 43.66 Ø 100.15 Ø100.00 Ø 8.43 Ø 7.99 Ø 55.18 Ø 55.21 allowance clearance pos. = 1 interference = 2 Table 2 Exercise 3: Fill in the table Shaft dimension Ø 25 Ø 75 Ø110 Ø108 0 - 0.2 + 0.4 + 0.2 +0.05 +0.02 +0.1 -0.05 Hole dimension Ø 25 Ø 75 Ø 110 Ø 108 Max. Limit of size hole + 0.3 + 0.1 0 - 0.1 + 0.10 0 + 0.25 + 0.15 Table 3 19 Min. Limit of size hole Max. Limit of size shaft Min. Limit of size shaft Max. Min. clearance clearance Exercise 4: State true (T) or false (F) for the following statements: T O F O O O O O O O O O O O 1) When manufacturing products it is unavoidable to get measurement differences 2) The allowance is called positive when the shaft is larger than the size of the hole. 3) The tolerance is negative when the difference between the deviations and the nominal dimension is greater than zero (0). 4) The tolerance is made of the difference between upper deviation and lower deviation. 5) The following type of tolerance ± 0.25 is called asymmetrical 6) the size of the tolerances has a severe impact on the cost of the product? 20 CM2-P2 Lesson 3: ISO Limits and Fits Exercise 1: Fill in the table for fits see table 21.1, page 287/288 Shaft dimension Hole dimension Ø 50 h6 Ø 50 H7 Ø 25 p6 Ø 25 P7 Ø 122 g6 Ø 122 K7 Max. Limit of size hole Min. Limit of size hole Max. Limit of size shaft Min. Limit of size shaft Max. Min. clearance clearance Exercise 2: Fill in the table Nominal Value Upper Deviation Lower Deviation Measurement Tolerance Pos. = 1 Neg. = 2 Ø 45 H6 Ø 6 p6 Ø80 D10 Relation to Manual of Engineering Drawing Fits see table 21.1, page 287/288 21 Total Tolerance Exercise 3: True or False State true (T) or false (F) for the following statements: T F O O O O O O O O O O O O 1) Fits are divided in the following kinds: clearance fit, press fit , interference fit. 2) International Tolerance grade system makes it possible to exchange parts always. 3) An interference fit can have a positive and negative allowance. 4) In the ISO shaft system is the upper deviation is always 0 5) A hole with Ø30H7 has a maximum limit of size of Ø30.025 6) A shaft with Ø55f7 has a maximum limit of size of Ø55.070 Exercise 4: Fill In the correct values below A technical drawing contains the following annotation: Ø40 H7/n6 Maximum limit of size hole: Minimum limit of size hole: Maximum limit of size shaft: Minimum limit of size shaft: Maximum clearance: Minimum clearance: Total clearance allowance: …………………… …………………… …………………… …………………… …………………… …………………… …………………… This fit is * a (n): clearance fit, *delete as applicable mm mm mm mm mm mm mm transition fit, interference fit The same questions for the fits 45f7/45H8 Maximum limit of size hole: …………………… Minimum limit of size hole: …………………… Maximum limit of size shaft: …………………… Minimum limit of size shaft: …………………… Maximum clearance: …………………… Minimum clearance: …………………… Total clearance allowance: …………………… This fit is * a (n): clearance fit, *delete as applicable mm mm mm mm mm mm mm transition fit, 22 interference fit The same questions for the fits 65h6/K7 Maximum limit of size hole: Minimum limit of size hole: Maximum limit of size shaft: Minimum limit of size shaft: Maximum clearance: Minimum clearance: Total clearance allowance: …………………… …………………… …………………… …………………… …………………… …………………… …………………… This fit is * a (n): clearance fit, *delete as applicable mm mm mm mm mm mm mm transition fit, interference fit The same questions for the fits 80H7/p6 Maximum limit of size hole: Minimum limit of size hole: Maximum limit of size shaft: Minimum limit of size shaft: Maximum clearance: Minimum clearance: Total clearance allowance: …………………… …………………… …………………… …………………… …………………… …………………… …………………… This fit is * a (n): clearance fit, *delete as applicable mm mm mm mm mm mm mm transition fit, 23 interference fit MEA CM1-P2 Lesson 4: Surface Texture Exercise 1: Surface roughness questions State true (T) or false (F) for the following statements: T O O O O O O O O O O O O F O 1) The functionality of a product requires specific demands for the used/applied surface roughness. O 2) Reducing the surface roughness can lead to substantial increase of wear and energy loss. O 3) When measuring the surface roughness the profile of the surface is used. O 4) For economic reasons the surface requirements should be not higher than the demands for the functionality of that surface. O 5) Under surface roughness is understood the irregularity from a surface, resulting from manufacturing of that plane. O 6) When determining the surface roughness with an electronic measuring device, the measured surface roughness Ra is independent of the selected base length l. O 7) The surfaces of a press fit should have an average roughness Ra of 3.2 micrometres. O 8) The surface roughness does not influence the behaviour of the product during its use. O 9) The desired roughness value for a product surface is also determined by the available manufacturing methods. O 10) The application of a needle roller bearing (roll surface) needs the surfaces to have an average roughness Ra value to between 0.025μm and 0.1 μm. O 11) Surface roughness is expressed in μm, whereby 1 μm equals 0.0001 mm. O 12) Using the manufacturing method drill (see figure 26.16 page 381) the attainable roughness is in between Ra 0.2 μm and 6.3 μm. 24 Exercise 2: Position all roughness symbols in product 01,02 and 03 Product 01, see figure 1, is produced in large quantities (> 250.000 /year) on an automatic (CNC) turning machine. The demands for the surface roughness are: For all not indicated areas Ra = 6.3 μm area A, Ra = 3.2 μm area B, Ra = 0.8 μm. Position all roughness symbols in the figure below. 01 fig. 1 A B 25 From product 02, see figure, is given that all not manufactured surfaces must adhere to the roughness Ra = 12.5 μm. But added surface roughness off the following are: surface A and B, Ra = 1.6 μm surface C and D, Ra = 3.2 μm Put all necessary symbols in the drawing. 2 B A C D Fig.2 26 On part 03, see figure, which is completely machined, the following surface roughness are demanded: Not indicated surfaces Ra = 3.2 μm. Surface A, Ra = 1.6 μm Surface B, Ra = 1.6 μm Surface C, Ra = 0.8 μm Surface D, Ra = 1.6 μm, with an area with an extra operation addition of chrome with a roughness of Ra = 0.4 μm. D Put all necessary symbols in the drawing. . 03 fig 3 C A 25 B 27 5 MEA CM1-P2 Lesson 5: Geometrical Tolerances Exercise 1: True or False T F 0 0 0 0 0 0 0 0 0 0 0 0 1) Perpendicularity doesn’t need a reference. 2) Using roundness, the largest measured diameter is applied. 3) Using position tolerances the dimensions are placed in a frame. 4) A roundness tolerance-field is formed by two concentric circles. 5) If roundness is applied on a Ø dimension the deviation field consists of a cylindrical tolerance field with a given diameter. 6) Coaxiality always uses a reference. 28 Exercise 2. Indicate the parallelism of the holes (datum needed) in the figure below. The tolerance is 0.03 mm Exercise 3. Describe what the geometrical tolerance indicates in the figure below. Description:_________________________________________________________________ |__________________________________________________________________________ |__________________________________________________________________________ |__________________________________________________________________________ |__________________________________________________________________________ 29 MEA CM1-P2 Lesson 6: Stacking of Tolerances Exercise 1. a Linear addition Add the dimensions of table 1 linearly Table 1 Tolerance chain Dimension 1 Dimension 2 Dimension 3 Dimension 4 25 ± 0,25 50 ± 0,45 60 ± 0,25 35± 0,2 Addition of nominal values: Tolerance: ± Opgave 1. b Quadratic addition Add the dimensions of tabel 1 quadraticly. Addition of nominal values:: Tolerance: ± Opgave 1. c Combined addition Add the dimensions of table 1 for all dimensions the tolerances are at ±4σ (independent), except dimension 4 which is dependent. Addition of nominal values: Tolerance: ± Opgave 2. a Linear addition Add the dimensions of table 2 linearly Table 1 Tolerance chain Maat 1 Maat 2 Maat 3 50 ± 0,02 30 ± 0.2 60 ± 0.02 Addition of nominal values: Tolerance: ± Opgave 2. b Quadratic addition Add the dimensions of table 2 quadraticaly Addition of nominal values: Tolerance: ± What do you notice? https://www.vinksda.nl/de-verdeling-van-toleranties/ https://www.vinksda.nl/statistisch-optellen-van-toleranties/ http://www.stat.washington.edu/fritz/Reports/isstech-95-030.pdf 30 MEA CM1-P2 CAD Lesson 7: Horizontal Stirling Engine Evaluation 31