Tutorial: How to make engine part 42
Intake valves
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Step 1:
open a sketch on the front plane
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Step 2:
draw a line
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Step 3:
continue
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Step 4:
add a line
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Step 5:
add a centerline
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Step 6:
continue the skech from lower side
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Step 7:
continue the sketching
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Step 8:
add shown line
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Step 9:
draw a spline
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Step 10:
draw the last line
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Step 11:
use sketch fillet command
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Step 12:
use revolve command
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Step 13:
open a sketch on the right plane
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Step 14:
draw a centerline
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Step 15:
draw a circle
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Step 16:
draw shown random lines
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Step 17:
use trim command
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Step 18:
use cut-extrude command
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Step 19:
use move-copy command like shown
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Step 20:
save the "intake valves"
next: http://grabcad.com/questions/tutorial-how-to-make-engine-part-43