MCE201-LECTURE 5
A. CHAPTER 7 – PICTORIAL PROJECTS – Review without going into too much
detail –No HW on this chapter – review only for historical reasons
B. Go over some of the PowerPoint slides-Designer and Design Teams
C. Additional Material on SW
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4.
LINEAR PATTERNS
Create a solid 5 x 6 x 1 inches
On the 5 x 6 side draw a small circle with r = 0.5 inches anywhere
Select Features and make an Extruded Cut - a hole – this hole is the seed feature
which will be used to make patterns
5. Select Linear Pattern
6. The first item is Direction 1 and is shown in bluish color
7. Click on any 5-inch edge of the 5 x 6 surface on which the hole was made
8. The second item is Direction 2 – click on the 6-inch edge
9. Go to Features to Pattern and click on the inside of the hole – clicking the edge of
the hole will not do it
10. Other parameters are – Number of Instances and Distance between holes – play with
these parameters for a number of different outcomes
11. Click on the arrows – on the list of parameters or on the model itself - to change
direction
12. SHOW MIRROR IMAGE FEATURE
13. Delete Direction 2 of the linear pattern above so that you only have one line of holes
14. Finalize the linear pattern
15. Go to Features, Reference Geometry and from the drop-down menu, choose Plane
16. When the Plane properties appear we want to create a plane parallel to the line of the
holes; click on the midpoint of one edge, click on the opposite midpoint and click on
the 5 x 6 side; Fully Defined appears in green color
17. In Features, click Mirror
18. In the first property, Mirror Face, click the Plane
19. In the second property, Features to Mirror, click on the pattern created; to expose the
Manager that keeps track of all the work click on the “+” sign to the right of the
properties of the mirror feature and click on the word LPattern and finalize
20. You can now change the size of the hole and the LPattern and the Mirror are changed
to reflect the re-sized hole
21. SHOW CIRCULAR PATTERN
22. Delete LPattern and Mirror and leave just the one hole – called seed feature
23. Go to Features, find Linear Pattern, click on the arrow and select Circular Pattern
from the drop-down menu
24. The first box is Pattern Axis; make sure you click it to turn the color from white to
bluish
25. Click the short edge of the solid; the one that is parallel to the axis of the hole created
26. Go to the Features to Pattern and click on the inside of the hole
27. Play with parameters, such as Number of Instances and Angle to place them; this is
fine but what if we want to place holes on a circle that has a center at the symmetry
point of the block??
28. CIRCULAR PATTERN - PLACE HOLES SYMMETRICALLY ON THE 5 X 6
INCH SIDE
29. Delete all patterns and keep only the seed feature – hole
30. Find the symmetry point of the 5 x 6 inch side
31. Go to Sketch and select a Line
32. Click on the 5 x 6 side and draw a line from symmetry point to the opposite symmetry
point; make sure you click the For Construction box on the left
33. And repeat with the other two symmetry points-connecting them with a line and
checking the For Construction box
34. Select a point and place it at the intersection of the two lines; SW will not be able to
find the intersection point unless you place a point at the intersection
35. Finalize the sketching of the lines and point
36. Go to Features and select Reference Geometry; from the drop-down menu select
Axis
37. Make sure the first box, Selections, is bluish
38. Click on the “mid-point” of the 5 x 6 inch section and anywhere on the 5 x 6 inch side
39. An axis is then defined and shown on the solid; finalize
40. Go to Features, find Linear Pattern, click on the arrow and select Circular Pattern
from the drop-down menu
41. The first box of the properties should have the axis
42. The following boxes are; Number of Instances and Angle; play with these to get
various results
43. Click on the white box – Features to Pattern – so that it turns a bluish color
44. Click on the inside of the hole and the circular pattern is complete
45. Right click on the pattern to edit it
46. Right click on the hole, Edit Sketch, to change the location and size of the hole
47. One can also sketch a circle of some specified size as an aid in placing the hole, and,
therefore, the pattern, at a certain radius from the symmetry point-make sure you
check the box For Construction
48. CREATE A CIRCULAR PATTERN ON A CYLINDER
49. Start a new file
50. Click on Front Plane, go to Sketch, and select Circle
51. Draw a circle at the (0,0) point with any radius
52. Press the Esc button on the keyboard
53. Click on the circumference of the circle and type 5 inches as radius
54. Go to Features, Extrude Boss/Base and type in 10 inches
55. Click on the base of the cylinder, go to Sketch, choose a circle and draw a circle with
radius equal to 0.5 inches
56. Go to Features, Extruded Cut and replace Blind with Through All
57. Go to Features, Linear Pattern, click on the arrow and choose Circular Pattern
from the drop-down menu
58. The first box on the left is the axis about which the pattern is to be made
59. Make sure it’s bluish and click on the cylindrical surface-note that no axis needs to be
defined in this case
60. The following boxes are Angle, Number of Instances and Features to Pattern
61. Go to the box Features to Pattern and click on the inside of the hole
62. Now you can play with the angle and the number of holes
63. One can also right click on the hole and edit sketch to change the size and location of
the hole
64. One can also sketch a circle of some specified size as an aid in placing the hole, and,
therefore, the pattern, at a certain radius from the symmetry point-make sure you
check the box For Construction
65. CHECKING DISTANCE BETWEEN HOLES IN A PATTERN
66. Two tools are available to measure – go to Sketch and choose Smart Dimension or
go to Tools, follow the drop-down menu and choose Measure
67. To get the holes within a given distance, use Trial and Error
68. CREATE A GEAR-Create a disk, cut a triangular shape at the circumference and use
circular pattern to make all teeth
69. CREATE A CYLINDRICAL CAM
70. Create a cylinder with a radius of 1 inch and a height of 10 inches
71. On the base of the cylinder draw a circle with one inch radius
72. Go to Features and choose Curves and from the drop-down menu choose Helix and
Spiral
73. You can change the pitch and the number of revolutions to make the helix
74. Finalize the helix sketch
75. Choose one of the other planes which is perpendicular to the base of the cylinder and
draw a rectangular shape that “cuts” into the cylinder – finalize the sketch
76. At this point you need two separate sketches – the helix and the rectangular cut
77. Go to Features and choose Swept Cut
78. The first box of the Swept Cut properties is the profile–click on the rectangular sketch
79. The second box is the path – click on the helix
80. And it’s done
81. CREATE A SPRING – same procedure as the cylindrical cam but no cylinder is
needed – so start with Step 71
82. In Step 75, instead of the rectangular shape, draw a small circle – 0.125 inch radius
83. In Step 77, choose Swept Boss/Base instead of swept cut and the spring is finished