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[经验感悟] AutoCAD 实战讲座

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鲜花(0) 鸡蛋(0)
发表于 2007-11-24 13:32 | 显示全部楼层 |阅读模式
老杨团队,追求完美;客户至上,服务到位!
AutoCAD 实战讲座2 Z. V3 d$ g: v9 @
http://www.newmaple.com/forumdisplay.php?fid=28% \7 t/ n1 I! @% V
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www.newmaple.com/video/autocad0006
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7 @+ R/ ]! _( J# W. C3 K& s1. Title block brief introduction
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8 H6 K7 o( D# n9 ^9 @$ `. u2. Text height6 _" G( ~- D" S. X
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3. Viewport * `+ k% J5 ?( z

( u7 G* K+ W/ P3 g+ |# c4. Dimensions style brief introduction
% U9 }( ~& s2 Q$ s+ q, Q•        Tolerance in Mechanical / Autocad
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special symbols
! _. D+ K& l) X% R& z%%D degree sign. G; O! ?/ {, ]# z/ [
%%P plus and minus sign7 r7 K2 a5 `4 s8 a1 y
%%C diameter symbol
鲜花(64) 鸡蛋(0)
发表于 2007-11-24 18:33 | 显示全部楼层
鲜花(0) 鸡蛋(0)
发表于 2007-11-24 19:27 | 显示全部楼层
Very practical!
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 楼主| 发表于 2007-12-3 12:38 | 显示全部楼层
老杨团队 追求完美
[V] AutoCAD 实战讲座第七讲/ ]9 `, s! t+ F$ `) N
AutoCAD 实战讲座第七讲
3 e# R, w$ V6 {6 D* s% `% v9 TNew Maple AutoCAD (7)" l" {& o" p' n$ K
www.newmaple.com/video/autocad0007
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A real sample to review lecture 6
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3 ^  v7 o+ p8 L7 g1 Y) e/ EIntroduction Roughness/ a) D/ z; }, d1 S
Quick check hole size and position
9 U- _" k  o; e2 P$ L! TIntroduction O-ring groove0 K! G7 V# f+ B2 o! X

% k( X4 A/ W" P7 M* LSurface roughness
1 |" a$ g; e$ n) B4 e' ^•        Imperial Unit: micro-inch 10-6 inch
( d. l- [$ i( T•        Metric Unit: micrometer 10-6 m
! I; _8 m. B: M2 l) h, w$ W•        Sample 250 micro-inch = 6.3 micrometer, q, ~/ \. W! I6 v8 I3 }' F
(250X25.4X10-3)4 X  ?3 e/ q# i$ }( s
•        250 micro-inch – forging surface
, x  I/ a+ [* H7 T6 @•        125 rough machine, 32 fine machine
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Inch size O-ring) i- O1 G' Z/ V
•        O-ring number 232; N& v, [# s; x/ `4 i7 Z
•        nominal size 2.75”x3”x1/8”& ^& G4 g' i' _; v# f/ ^1 U4 n
•        Actual size 2.734”x3.012”x0.139”
- w, L3 t; H+ E- S2 s3 `# ^& w•        Static surface seal groove depth 0.101~0.107 about 25% squeeze2 e) }  t3 F; X$ i# c
•        One of OD or ID is close standard size
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7 T3 h/ P9 K9 phttp://www.newmaple.com/forumdisplay.php?fid=28
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