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

5 y' k0 D' I: c, K& i2. Text height
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0 n6 P7 ~2 W8 x7 ?3 j5 C3. Viewport

4 H% u4 R6 \7 R2 O! U4. Dimensions style brief introduction
•        Tolerance in Mechanical / Autocad

special symbols
%%D degree sign
%%P plus and minus sign
5 {8 ]$ B' C% o, y. \%%C diameter symbol

恭喜发财

爱城飞雪

Very practical!

DaShan

[V] AutoCAD 实战讲座第七讲
. u8 l' Y' z2 zAutoCAD 实战讲座第七讲
New Maple AutoCAD (7)
www.newmaple.com/video/autocad0007

) J, H$ Q$ s, v. |2 KA real sample to review lecture 6

Introduction Roughness
: [0 W4 i+ L2 j( O* gQuick check hole size and position
Introduction O-ring groove
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Surface roughness
" c8 Q4 C4 `3 g7 l! F# G•        Imperial Unit: micro-inch 10-6 inch
•        Metric Unit: micrometer 10-6 m
; \4 g+ @4 ?1 y# y' G! q•        Sample 250 micro-inch = 6.3 micrometer
(250X25.4X10-3)
•        250 micro-inch – forging surface
•        125 rough machine, 32 fine machine
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% t5 u( H- i( D4 l" _- C+ tInch size O-ring
% A- A/ p: @  Q' Y1 `. L0 S•        O-ring number 232
•        nominal size 2.75”x3”x1/8”
# F! P7 ^4 ~4 I4 O•        Actual size 2.734”x3.012”x0.139”
4 R1 Q! p' o0 g, {•        Static surface seal groove depth 0.101~0.107 about 25% squeeze
4 o# x9 ^2 G- a, E  F•        One of OD or ID is close standard size
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http://www.newmaple.com/forumdisplay.php?fid=28