AutoCAD 实战讲座

DaShan

AutoCAD 实战讲座
9 b2 S5 X8 h5 I! O. D) `http://www.newmaple.com/forumdisplay.php?fid=28
. ]" L3 ]- r; Z8 ?+ Q( X
% Z- f0 Z, k3 ]6 Swww.newmaple.com/video/autocad0006
* c' @! K3 F# w$ K- G/ ~( `/ U
1. Title block brief introduction
$ U, m/ Y- i; v- H+ z4 N/ R0 R
" ], s3 L: q% W8 s. e2. Text height

: E7 U' D- d5 Z# K2 u3. Viewport

4. Dimensions style brief introduction
3 }* y- S; S. q- W•        Tolerance in Mechanical / Autocad
9 T6 d! I! X! h1 J+ ^4 b
special symbols
9 g, \. a, p& V3 f; I%%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
AutoCAD 实战讲座第七讲
New Maple AutoCAD (7)
6 t9 c+ q0 D( l9 kwww.newmaple.com/video/autocad0007

A real sample to review lecture 6

Introduction Roughness
4 {3 C2 T. [0 [4 l5 ?1 p3 UQuick check hole size and position
Introduction O-ring groove
$ w" R  b2 D( T2 N
$ m: R) S2 D; z* j1 ]5 ASurface roughness
•        Imperial Unit: micro-inch 10-6 inch
•        Metric Unit: micrometer 10-6 m
•        Sample 250 micro-inch = 6.3 micrometer
3 p2 S3 r0 O5 ~- q6 f5 i2 ^8 T(250X25.4X10-3)
2 z7 S* _, P: F" Y! a5 ^•        250 micro-inch – forging surface
•        125 rough machine, 32 fine machine

1 n3 t+ X& o' u) NInch size O-ring
6 }6 U, W. S! a6 C* \! }! T•        O-ring number 232
•        nominal size 2.75”x3”x1/8”
•        Actual size 2.734”x3.012”x0.139”
3 U  U) [( o4 i  c•        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