Tutorial: How to make engine part 33
CYLINDER HEADS
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Step 1:
roll the line back up to shown place
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Step 2:
open a sketch on the right plane
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Step 3:
draw a centerline
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Step 4:
draw shown sketch
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Step 5:
mirror shown lines
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Step 6:
add these lines
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Step 7:
use trim command
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Step 8:
draw one more centerline
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Step 9:
add two circles
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Step 10:
use trim command again
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Step 11:
extrude it trought to two direction
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Step 12:
open a sketch on the shown face
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Step 13:
draw shown circles
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Step 14:
draw same circles to other side
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Step 15:
cut the body by 8 mm
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Step 16:
roll the line forward
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Step 17:
open a sketch on the right plane..
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Step 18:
draw a centerline like shown
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Step 19:
continue the sketch
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Step 20:
finish your sketch like shown
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Step 21:
use cut revolve command
next: http://grabcad.com/questions/tutorial-how-to-make-engine-part-34