MCE201-LECTURE 4
A. Chapter 6 from the text-SKIP Chapter 5 –Multiviews and Visualization
Go over the slides and stress the importance of Auxiliary Views-to give the
machinist a view with correct dimensions-Then we will go to SW and do Fig. 6.2 and
6.16
1.
2.
3.
4.
CREATE the shape of Fig. 6.2
Open SW and choose File, then New
Choose Part
We must choose the units before we start – Tools, Options, Document Properties,
Units– choose inches
5. Also let us choose Tools, Options, Document Properties, Grid/snap and click
Display Grid – also choose major spacing – one inch
6. Also click Go to System Snaps and make sure all items are checked
7. Choose Front Plane, and draw a rectangular shape – 3 x 3”
8. Choose Features and Extrude 3 inches
9. Click the top surface of the solid and draw 0.5 x 3 inches rectangular shape
10. Choose Features and cut 2.5 inches to create the step shown in Fig. 6.2
11. Click on the side of the step
12. Choose Sketch and select Line
13. Start from the mid-point of the side and end at the end of the step
14. Draw another line along the vertical edge
15. Draw another line back to the mid-point
16. Select Features and Select Extruded Cut – change Blind to Through All
17. Name it Auxiliary One and Save it – feel free to make it colorful and pretty!!
It should be saved before we go to the next step to make a drawing but it’s not that
Important – SW will prompt you to save it before go to Drawing
18. Click on the first line of the manager-Auxiliary One - and color it
19. Click on File, and from the drop-down menu, select Make a Drawing From Part
20. Click OK when the ICON appears
21. Select Layout and choose Standard 3 View
22. On the left, make sure that Auxiliary One is selected
23. Click OK if you see it or Browse to find it
24. Select Sketch and choose Smart Dimension
25. On the drawing you can now measure different lengths to show that some of the
standard views show the wrong dimensions for the inclined surface – WE MUST USE
AN AUXILIARY VIEW in these cases-machinists need it; but before we go to
Auxiliary Views in SW let us look at the dimensions.
26. Click any dimension you have inserted using Smart Dimension
27. A significant amount of information appears on the left side – click Other on top left
28. Unclick Use Document Font
29. Click Document Font
30. Select the font you like and points to make the font of the dimension bigger –Try 36
points first to see if you like that size– press the CTRL key and click all dimensions
that you want to select to make a change
31. Select Value on top left – a bit further down you will see Tolerance/Precision – Leave
no tolerance specification right now but you can change the accuracy to any decimals
you like
32. Also you can go further down to Dimension Text and after <DIM> you can put
anything you like and it appears on the dimensions highlighted in the drawing
33. LET US NOW SHOW HOW YOU MAKE THE NECESSARY AUXILIARY
DRAWING
34. Select View Layout – the fourth option is Auxiliary View
35. Select Auxiliary View
36. It will ask you to click on the edge that you want to view
37. Click on the inclined edge on the drawing and the Auxiliary View is shown
38. Also on the left you can see that you can change the direction by clicking or
unclicking Flip Direction
39. Also you can change the font so that you can see the name of the Auxiliary View
better
40. So for the first problem of the HW that is all you need to show – the Three Standard
Views and one Auxiliary View – NO DIMENSIONS are needed at this point
41. CREATE the shape of Fig. 6.16-TRUE ANGLE Example
42. Open SW and choose File, then New
43. Choose Part
44. We must choose the units before we start – Tools, Options, Document Properties,
Units– choose inches
45. Also let us choose Tools, Options, Document Properties, Grid/snap and click
Display Grid – also choose major spacing – one inch
46. Also click Go to System Snaps and make sure all items are checked
47. Choose Front Plane, and draw a rectangular shape – 3 x 3”
48. Choose Features and Extrude 3 inches
49. Click on one side
50. Select Sketch and choose Line
51. Draw a line from the mid-point of the bottom edge to the mid-point of the top edge
52. On the left – check the box For Construction
53. Using the Line draw from any point of the construction line another line at some
arbitrary angle to the left
54. Again using the Line draw from any point of the construction line another line at some
arbitrary angle to the right
55. Select Smart Dimension
56. Click on the vertical construction line and then one the angled lines – one at a time
57. A box appears with some angle – type in that box the value you want – say 30 degrees
and Smart Dimension will move the angled line to make it at 30 degrees to the vertical
construction line
58. Repeat with the other angle line to also make it 30 degrees
59. This way we insure symmetry of the 60-degree angle
60. Select Features and choose Extruded Cut
61. This makes a cut perpendicular to the face where the 60-degree angle was drawn
and of course, the angle between the two planes is also 60 degrees
62. But now let us make this cut at some other angle – say 35 degrees – and not
perpendicular to the face where the 60-degree angle was drawn
63. Delete the Extruded Cut just made
64. Click on the top face and select Sketch and choose Line
65. Draw a line from the symmetry point of the top edge to the symmetry point of the back
edge of the top face- check the box For Construction
66. Draw another line from the symmetry point of the top edge at any angle
the construction line just drawn
67. Select Smart Dimension
68. Click on the construction line and the angled line
69. Type in 35 degrees or any angle you like and Smart Dimension will rotate
angled line to whatever angle you choose
70. IMPORTANT – At this point you must have two sketches – one for the 60 degree
angle on front face and another sketch for the angled line at 35 degrees on the top faceone sketch for both will not work
71. Click Features and select Swept Cut
72. The first line is the Profile - the 60-degree skecth– you can see that by pointing to the
first line and not clicking
73. The second line is the Path –the 35-degree line on top face – you can see that by
pointing to the second line and not clicking
74. IMPORTANT – This will not work and no cut is made – The reason is that the 60degree sketch-the Profile cannot be open in a Swept Cut
75. Cancel the Swept Cut
76. Right click on the 60-degree angle sketch, select Edit Sketch, select line and close the
third side of the angle
77. Now you are ready to select Features, choose Swept Cut, click on any side of the 60degree angle for the first line-Profile- of the Swept Cut features on the left and click
on the 35-degree line for the second line-Path
78. Finalize and the angled cut is made
79. Name this part True Angle and save it
80. Click File and choose Make a Drawing From Part
81. Make sure that the part True Angle is shown, otherwise choose Browse to get the part
True Angle
82. Click OK
83. Drag from the drawings to the right the one that shows three parallel lines at an angle
84. Now we want to measure the true angle of the cut represented by these three lines
85. An Auxiliary View is the only way to get that true angle but an auxiliary view requires
and edge to view these three lines which does not exist – so we have to draw and edge
90 degrees to the three lines, as follows:
86. Select Sketch and choose Line
87. Start from a corner of the drawing such that you can draw a line that intersects the
three parallel lines at some angle – make the line long enough to go beyond the
drawing boundary
88. Choose Smart Dimension
89. Click on the line drawn and any of the three parallel lines
90. Type in 90 degrees on the window that appears and smart dimension will rotate it to
make it 90 degrees to the three lines
91. Select Layout, choose Auxiliary View and click on the line perpendicular to the three
parallel lines
92. The auxiliary view is drawn
93. Select Smart Dimension and measure the angle – that’s the true angle which is
different than 60 degrees-This is important to measure for the machinist to make a
channel that has the correct angle
94. If we keep cutting at steeper angles the angle will go to ZERO when we cut at a
direction that is parallel to the face where the 60-degree angle was drawn
95. You can measure other angles in other drawing views but they are all wrong
96. One can imagine that the true angle will become smaller and smaller as we
97. You must have now TWO sketches – the 3 x 5 inch sketch and the 3-D sketch
98. Click Features and select Swept Boss/Base
99. The first line is the Profile – you can see that by pointing to the first line and not
clicking
100.
Go to another Feature in SW– Lofted Boss/Base- This is tricky and we may
have to do it several times
101.
Select File, New, Part, Options, Document Dimensions and select inches – no
Grid is needed for this example
102.
Choose Front Plane and draw a circle at any position and size
103.
Select Sketch, click on the arrow and choose 3-D Sketch
104.
Select a Point and place it anywhere
105.
Change position of the point to (2, 2, 2) and finalize by exiting sketching mode
106.
You must have two sketches – the circle on the front plane and the 3-D Sketch
which is the (2, 2, 2) point-finalize the definition of the 3-D sketch
107.
Select Features, choose Reference Geometry and select Plane from the dropdown menu
108.
Click on the 3-D point, (2, 2, 2)
109.
Click on the “+” just to the right of the plane definition to expose the manager
with all the details of our work
110.
Click Front Plane and make sure that the two parallel lines option is selected –
it’s the first one
111.
You will now see that SW says that the plane is now Fully Defined in green
color
112.
Finalize and exit the plane definition
113.
Choose the plane just defined and draw any shape – circle or square
114.
Exit the sketching mode
115.
You must now have two sketches on two parallel planes and are ready to do the
Lofted Boss/Base
116.
Select Features, Lofted Boss/Base and click on the two shapes on the two
parallel planes and it’s done
117.
Boundary Boss/Base does something similar but creates only the boundary and
not a solid