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[经验感悟] AutoCAD 实战讲座

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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 N/ E$ m! y% ^6 y3 `7 chttp://www.newmaple.com/forumdisplay.php?fid=280 j, r$ ?) K1 {) k* e

6 Q- H, W4 m* R2 F7 Y! fwww.newmaple.com/video/autocad0006
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1. Title block brief introduction& ?" `! d% R( _. r, f
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2. Text height
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! G9 u) o3 X5 x3. Viewport
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( ]$ S6 |+ I# S4. Dimensions style brief introduction
- s% T, \8 H. Q" f% G& X•        Tolerance in Mechanical / Autocad5 |0 n5 W* {5 ^  t' T
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special symbols  P$ Z& T5 L. {( X9 ~$ Y
%%D degree sign
6 |( L% _$ N3 M4 G; a%%P plus and minus sign- g/ A" a2 d! F0 O
%%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!
大型搬家
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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
4 {3 L0 q& H. U9 eAutoCAD 实战讲座第七讲
" J% w5 M0 R" w) d! {2 v0 @; cNew Maple AutoCAD (7)! |5 ]" }7 f8 Z+ F. |. ^
www.newmaple.com/video/autocad0007; j% n$ C+ x' n

4 Y1 k$ C9 j  |" W- a1 y# WA real sample to review lecture 6; I& x" u& Q# M, T3 E+ E

9 V* P! B- H) S  c$ m# H, ^Introduction Roughness9 e6 H$ L  D  h) L5 O4 d
Quick check hole size and position: m+ a# U9 n- j& w; `
Introduction O-ring groove
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- K2 I- F' a' u% t5 _7 }Surface roughness
) _5 e6 q8 z% w•        Imperial Unit: micro-inch 10-6 inch- t3 i$ @  S3 z; b0 x/ w4 z: ]
•        Metric Unit: micrometer 10-6 m  y% r9 C8 h0 d. Y  A5 }
•        Sample 250 micro-inch = 6.3 micrometer
" q& c' u1 p5 R, a(250X25.4X10-3)4 W4 G% D8 R7 E. x7 W+ K) ~( y1 _. F
•        250 micro-inch – forging surface* t' k& F4 f# p  T, _/ i; m5 Q3 _
•        125 rough machine, 32 fine machine: S) x  F8 c+ Q
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Inch size O-ring' r9 z4 A  @. g0 [
•        O-ring number 232
2 a1 J4 v5 A) z& f" f, O6 V3 d•        nominal size 2.75”x3”x1/8”
1 L; l1 J5 _. L" n) R•        Actual size 2.734”x3.012”x0.139”
; J# Z$ j" w. @; u% O5 c4 |•        Static surface seal groove depth 0.101~0.107 about 25% squeeze; _+ I5 t9 y# y6 e1 h3 Y/ o$ v
•        One of OD or ID is close standard size
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http://www.newmaple.com/forumdisplay.php?fid=28
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