AutoCAD 实战讲座

DaShan

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

www.newmaple.com/video/autocad0006

1. Title block brief introduction

6 v  ?, H2 d/ _1 h" I2. Text height
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3. Viewport
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0 T& d( L' P/ O4 o3 m) H' c% o4. Dimensions style brief introduction
•        Tolerance in Mechanical / Autocad
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special symbols
%%D degree sign
%%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
- r7 s  {  J( U$ q8 G! pAutoCAD 实战讲座第七讲
New Maple AutoCAD (7)
4 I2 k% m& n* J, `& awww.newmaple.com/video/autocad0007
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7 z( e) C0 B( c' QA real sample to review lecture 6
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* `7 O- H* T8 i- K2 {; V7 [* _Introduction Roughness
Quick check hole size and position
Introduction O-ring groove
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7 r4 U7 ?. X- L. DSurface roughness
$ ?+ H( m; n2 v/ _  M: j•        Imperial Unit: micro-inch 10-6 inch
•        Metric Unit: micrometer 10-6 m
  b2 r% A$ Z" D# {3 f( ~6 v•        Sample 250 micro-inch = 6.3 micrometer
" P9 |) U: [) L2 D- N; @2 y9 |# `(250X25.4X10-3)
•        250 micro-inch – forging surface
. X% F  }# b- w& Q+ S•        125 rough machine, 32 fine machine
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7 ?! a% V/ }  G$ K; r9 w" V0 ZInch size O-ring
•        O-ring number 232
! }3 }+ C' q% u$ h' L. a& f•        nominal size 2.75”x3”x1/8”
•        Actual size 2.734”x3.012”x0.139”
* X( _/ B% ?2 H: A- R) ~8 P' G* Q0 W•        Static surface seal groove depth 0.101~0.107 about 25% squeeze
. f  A; J7 p( q+ v•        One of OD or ID is close standard size
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http://www.newmaple.com/forumdisplay.php?fid=28