AutoCAD 实战讲座

DaShan

AutoCAD 实战讲座
" p+ }7 O# S" w7 g; Whttp://www.newmaple.com/forumdisplay.php?fid=28
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www.newmaple.com/video/autocad0006

! p. X7 r# w2 z3 z% v1. Title block brief introduction
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2. Text height

3. Viewport
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4. Dimensions style brief introduction
1 X/ M5 d: N. C•        Tolerance in Mechanical / Autocad

special symbols
%%D degree sign
/ K  |' u  W  r0 f%%P plus and minus sign
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恭喜发财

爱城飞雪

Very practical!

DaShan

[V] AutoCAD 实战讲座第七讲
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New Maple AutoCAD (7)
www.newmaple.com/video/autocad0007
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A real sample to review lecture 6
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Introduction Roughness
Quick check hole size and position
3 _5 B  x7 |) t) b3 _+ \0 @Introduction O-ring groove

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•        Imperial Unit: micro-inch 10-6 inch
- ~7 Q" t/ e% R# o' n•        Metric Unit: micrometer 10-6 m
9 o$ C6 H  W+ w& \' s; I•        Sample 250 micro-inch = 6.3 micrometer
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•        250 micro-inch – forging surface
•        125 rough machine, 32 fine machine
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Inch size O-ring
•        O-ring number 232
* s% ?4 W' e) d. r! B•        nominal size 2.75”x3”x1/8”
•        Actual size 2.734”x3.012”x0.139”
•        Static surface seal groove depth 0.101~0.107 about 25% squeeze
•        One of OD or ID is close standard size
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http://www.newmaple.com/forumdisplay.php?fid=28