AutoCAD 实战讲座

DaShan

AutoCAD 实战讲座
http://www.newmaple.com/forumdisplay.php?fid=28
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www.newmaple.com/video/autocad0006

1. Title block brief introduction
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" C# l  [! p" L2. Text height
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" d/ J' P/ J. S& h/ E8 R8 p. X% g3 M3. Viewport
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4. Dimensions style brief introduction
' s+ k* u& ^1 J0 h& c•        Tolerance in Mechanical / Autocad
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special symbols
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%%P plus and minus sign
%%C diameter symbol

恭喜发财

爱城飞雪

Very practical!

DaShan

[V] AutoCAD 实战讲座第七讲
; o6 K4 x" T( Q% uAutoCAD 实战讲座第七讲
, P( _, j+ [7 n/ v; ?1 b9 f8 CNew Maple AutoCAD (7)
" f% w& Q% @2 C& |/ I* j# i" Ywww.newmaple.com/video/autocad0007

; |* f$ Y/ R4 y) j! I% o5 Z% pA real sample to review lecture 6
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Introduction Roughness
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Introduction O-ring groove
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Surface roughness
, p/ p' a& M4 p/ c+ |7 }•        Imperial Unit: micro-inch 10-6 inch
9 Z$ i+ w9 I+ [: o•        Metric Unit: micrometer 10-6 m
) {$ q$ S! Y, V5 F- t! `0 _. R+ b. G•        Sample 250 micro-inch = 6.3 micrometer
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. ?4 |' X1 ^2 {* C8 X2 b•        250 micro-inch – forging surface
•        125 rough machine, 32 fine machine
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) H4 F7 Z; m$ o+ SInch size O-ring
•        O-ring number 232
•        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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. ^$ Y4 M; Q6 o; H. y" V; |# Z% Ihttp://www.newmaple.com/forumdisplay.php?fid=28