AutoCAD 实战讲座

DaShan

AutoCAD 实战讲座
http://www.newmaple.com/forumdisplay.php?fid=28
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4 g/ X5 c, T+ \+ F6 G7 \  @# z: Swww.newmaple.com/video/autocad0006

1. Title block brief introduction
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2. Text height

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4. Dimensions style brief introduction
•        Tolerance in Mechanical / Autocad

+ Z$ G7 a5 e, ~- ^special symbols
+ Y1 n* M, z! f  s%%D degree sign
%%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
AutoCAD 实战讲座第七讲
New Maple AutoCAD (7)
www.newmaple.com/video/autocad0007
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A real sample to review lecture 6
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, s# z3 W, d+ O/ I5 WIntroduction Roughness
$ U" X5 c, z, F1 D/ iQuick check hole size and position
9 @: t: q' W4 i2 y$ ^8 t  j7 |- LIntroduction O-ring groove

/ z, K) i' O3 _9 ZSurface roughness
•        Imperial Unit: micro-inch 10-6 inch
•        Metric Unit: micrometer 10-6 m
•        Sample 250 micro-inch = 6.3 micrometer
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8 e+ `& g8 _$ K' J' E0 \( S•        250 micro-inch – forging surface
•        125 rough machine, 32 fine machine
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Inch size O-ring
/ I3 S% h- h. G: e: G% Z$ Z( D9 v•        O-ring number 232
•        nominal size 2.75”x3”x1/8”
•        Actual size 2.734”x3.012”x0.139”
5 L, g+ G6 |7 @: x' O9 j5 \/ L•        Static surface seal groove depth 0.101~0.107 about 25% squeeze
•        One of OD or ID is close standard size

http://www.newmaple.com/forumdisplay.php?fid=28