hapter Tests and Problems HAPTER 14 Pictorial rawings and Technical Illustrations Test INSTRUTIONS Answer the questions with short, complete statements or drawings as needed. QUESTIONS 1. What is the basic intent of pictorial drawings? 2. riefly define solid models and give at least two applications for solid models. 3. escribe parametric solid modeling and define the term parameters in your definition. 4. Name the most realistic type of pictorial illustration. 5. riefly describe technical illustration. 6. List at least three professional uses for pictorial drawings. 7. Explain the difference between isometric lines and nonisometric lines. 8. Identify the lines that can be measured directly and transferred to the isometric drawing. 9. Give the angles between each of these three isometric axes. 10. List the three basic forms of isometric drawing. 11. Give the shape of an isometric sphere.. escribe the proper placement of extension lines, dimension lines, and dimension text when doing isometric dimensioning.. Identify the proper placement of arrowheads on isometric dimensions. 14. ompare dimetric and isometric projection. 15. escribe an exploded assembly and identify the drawing method most commonly used to create exploded assemblies. 16. Give two names that identify the centerlines used in exploded views to show the connection between part and subassembly axis and the thin solid extension lines that can be used to connect among noncylindrical features, parts, and subassemblies. 17. efine oblique drawing. 18. List the three methods of oblique drawing. 19. Name and describe the three types of perspective drawings.. escribe the greatest realism in pictorial presentation that can be achieved by A systems. hapter 14 Pictorial rawings and Technical Illustrations Problems INSTRUTIONS hoose the best axis to show as many features of the object as possible in your axonometric or oblique drawing. Problem assignments are presented as engineering designs or sketches and may not match proper ASME standards. or axonometric problems Problems 14.1 through 14.10 draw isometric, dimetric, or trimetric as assigned. or oblique problems Problems 14.11 through 14.17 draw cavalier, cabinet, or general oblique as assigned. Remember that circular features are best shown in the front plane of the oblique view. or perspective problems Problems 14.18 through 14.25 make a one-, two-, or three-point perspective drawing as assigned except for Problem 14.18, which should be done as a one-point perspective view. All objects can be turned at any desired angle on the picture-plane line for viewing from the station point, except Problem 14.18, which should be drawn in the direction indicated. 1. Make a freehand sketch of the object to assist in visualization and layout of axonometric and oblique problems. 2. or axonometric and oblique problems, select a scale to fit the drawing comfortably on an A- or -size (A4 or A3 metric) drawing sheet. Use a - or -size (A2 or A1 metric) drawing sheet for drawing an initial layout of the perspective problems on sketch paper or butcher paper. 59728_ch14_EO_ptg01.indd 1
2 3. imension axonometric or oblique problems only if assigned by your instructor. o not place dimensions on a perspective view. 4. Perspective objects without dimensions can be measured directly on the given problem and scaled up as indicated or assigned. 5. Use an ASME standard border and sheet block, unless otherwise specified by your instructor. rafting Templates To access A template files with predefined drafting settings, go to the Student ompanion Website, select Student ownloads, rafting Templates, and then the appropriate template file. Part 1: Problems 14.1 Through 14.5 Problem 14.1 Axonometric projection (in.) Problem 14.4 Axonometric projection (metric) 5 R32.75.45.75.75 3.10.45.5 R32 R34 45 65 Problem 14.2 Axonometric projection (in.) R22 [18 Problem 14.5 Axonometric projection (in.) 2X [1.15 2.75.90 458.90 1.65 4.00 2.90 1.45.75.55 Problem 14.3 Axonometric projection (in.) 4. 1.45 1.10 2.00.38 1.91 72 2.00 [2.10 2X 458 3. 59728_ch14_EO_ptg01.indd 2
3 Part 2: Problems 14.6 Through 14.10 PROLEM 14.8 Axonometric projection (metric) PROLEM 14.6 Axonometric projection (metric) 15 50 17 44 10 88 22 2X 15 64 1 24 24 64 51 2X 45 32 55 51 38 PROLEM 14.9 Axonometric projection (metric) PROLEM 14.7 Axonometric projection (in.) 4X.40 33 70 50 43 64 1.90 3 60 4.25 1.75.30 182 40 90.25.25 45 2.15.64 PROLEM 14.10 Axonometric projection (in.) 3 8 2 3 4 3 16 KEYWAY 1 1 1 4 2 2 1 4 1 2 4 1 1 4 1 3 8 1 2 2 59728_ch14_EO_ptg01.indd 3
4 Part 3: Problems 14.11 Through 14. Problem 14.11 Oblique projection (in.) Part 4: Problems 14.14 Through 14.17 PROLEM 14.14 Oblique projection (metric) [ 19 94 15 58 15 18 [3.90 [2.76 57 45 [1.75 45 38 19 2X.54 458 4X [.34 1.24 [.18 [.56.19 PROLEM 14.15 Oblique projection (in.) 2X Problem 14. Oblique projection (in.) 1.5 1.3 2.62 R1. 2X 3.00 3.62 1.62 2.00 5.24 3.76 1.88 PROLEM 14.16 Oblique projection (in.) 2X.65.75 1.65.90.24 R Problem 14. Oblique projection (in.) 2.30 1.40 4.70.52 2X.85.39 1.55.48.64 1.42 4.00.40 R.150 R.100 2.00 59728_ch14_EO_ptg01.indd 4
5 PROLEM 14.17 Oblique projection (in.) Part 6: Problems 14. Through 14.25 1.15 2.30 2X.58 PROLEM 14. Perspective R.80 2..48 1.94 1.0 1.6 1.75 Part 5: Problems 14.18 and 14.19 Problem 14.18 Perspective MEASURE AN INREASE 2X WINOW PROLEM 14.21 Perspective E EILING A VIEW A WINOW E PLAN ELEVATION Problem 14.19 Perspective MEASURE AN INREASE 2X 53' 26' 11' 18' 59728_ch14_EO_ptg01.indd 5
6 PROLEM 14.22 Perspective PROLEM 14.24 Perspective MEASURE AN INREASE 2X MEASURE AN INREASE 3X PROLEM 14.23 Perspective PROLEM 14.25 Perspective A E E A ' 0" 30' 0" ELEVATIONS PLAN 2' 0" ' 0" 15' 0" 6' 0" MEASURE AN INREASE 3X ' 0" 9' 0" 7' 0" 6' 10" 3' 0" 4' 0" ' 0" 3' 0" 6' 0" 10' 0" 59728_ch14_EO_ptg01.indd 6
7 Part 7: Problems 14.26 and 14.27 AVANE Problem 14.26 Go to the hapter 15, Working rawings, problems. These problems are presented as assembly drawings, exploded isometric assembly drawings, parts lists, and dimensioned isometric detail drawings. An assembly drawing is a drawing that shows how the parts of a product go together. A detail drawing is a drawing of an individual part that contains all of the views, dimensions, and specifications necessary to manufacture the part. A parts list identifies every part in the assembly and is a tabulation of all parts and materials used in a product. These drawing types are described in detail in hapter 15, Working rawings. These fundamentals are not important at this time. rom the problems in hapter 15, Working rawings, select one or more of the problems or as assigned by your instructor. Using the drawings and information provided in the assigned or selected problem, create an exploded isometric technical illustration, with trails, and identification numbers correlated to a parts list. imensions are not required. There is no recommended solution. and these problems are considered advanced. In addition or alternately, use your 3- modeling program to create solid models of the selected parts and assembly. onfirm the preferred approach with your instructor. AVANE Problem 14.27 ind a product of your choice or as assigned by your instructor. The product should have at least four parts and must be something that you can easily disassemble without destroying. This is entirely your responsibility. Using the selected product, create an exploded isometric technical illustration, with trails, and identification numbers correlated to a parts list. You need to measure the parts to create the drawings. Measurements should be accurate, but exact measurements are not required, because the drawings will not be dimensioned. There is no recommended solution, and these problems are considered advanced. In addition or alternately, use your 3- modeling program to create solid models of the selected parts and assembly. onfirm the preferred approach with your instructor. The following is an example of an exploded isometric assembly drawing: PARTS LIST 19 1 2 3 ITEM NO. 1 2 3 4 5 6 7 8 9 10 11 PART NAME HOUSING LUE PORT SR GUIE GUIE SREW AXLE SLIE PIVOT GEAR TRANSER GEAR PINION GEAR RIVE GEAR ANTI REVERSE SPG ANTI REVERSE OVER PLATE OVER SREW ITEM NO. 14 15 16 17 18 19 21 22 23 24 25 26 PART NAME SHANKE SREW SHANKE SHAT SHANKE HANLE HANLE KNO HANLE SREW ROTATING OY AIL SREW AIL TRIP LEVER LEVER SREW TRIP SPRING SR TRIP SPRING AIL SREW ITEM NO. PART NAME 27 AIL SPRING 28 WEIGHT SREW 29 OUNTER WEIGHT 30 ROLLER LINE 31 LINE SREW 32 ALE PLATE 33 HEX NUT 34 AXLE 35 SPINLE 36 LIK SPRING 37 SPOOL 38 RAKE SPRING 39 RAG KNO 22 21 7 23 24 26 27 25 28 30 29 33 31 4 5 32 6 8 9 10 11 14 15 16 34 36 17 35 18 37 39 38 SPINNING REEL 59728_ch14_EO_ptg01.indd 7
8 Math Problems Part 8: Problems 14.28 Through 14.32 PROLEM 14.28 Provide the measurements required to construct isometric, dimetric, and trimetric projections using the following actual dimensions of the parts. The dimetric and trimetric angles are given. IMENSION ISOMETRI IMETRI TRIMETRI Left axis 1.55 (108) (258) Right axis 2.95 (408) (458) Vertical axis 2.07 PROLEM 14.29 Provide the dimetric projection measurements for an object with the following actual dimensions. The left and right axis angles are given. RAWING IMENSION MEASUREMENT Left axis 258 2.87 Right axis 408 4.46 Vertical 3.22 PROLEM 14.30 Provide the trimetric projection measurements for an object with the following actual dimensions. The left and right axis angles are given. RAWING IMENSION MEASUREMENT Left axis 108 4.95 Right axis 608 3.18 Vertical 2.86 PROLEM 14.31 If a 3/4 scale is used to draw the receding axis of a general oblique object, how long would you draw the following dimensions on the receding axis? 3.23 6.54 2.48 4.29 PROLEM 14.32 If a cylindrical object has a diameter of 3.75 in., what is the approximate width of the block shading that should be applied to it? 59728_ch14_EO_ptg01.indd 8