 鲜花( 0)  鸡蛋( 0)
|
楼主 |
发表于 2007-12-3 12:38
|
显示全部楼层
[V] AutoCAD 实战讲座第七讲
2 y9 @) z- l/ _/ U4 |* h: VAutoCAD 实战讲座第七讲% ?5 X! J/ I* P. P% }0 F: f/ ?
New Maple AutoCAD (7)8 |* m& K! _% {3 x& Y" j4 i
www.newmaple.com/video/autocad0007! [7 y1 x2 G! N3 g# {$ |
' s' p. |5 D& B
A real sample to review lecture 65 y, N1 a3 L( }* S- _( X
/ `, }" `! _% n* [; B8 ]4 V3 N
Introduction Roughness1 b1 e0 X% k/ m N4 o$ I1 p) C6 R
Quick check hole size and position: a" v( p* ~7 I0 W/ q
Introduction O-ring groove5 s$ d& f$ [2 S5 u- t
! \1 U! l, c! M n) x! y9 _
Surface roughness
' k" U3 h" i2 l( Y8 t• Imperial Unit: micro-inch 10-6 inch
' m' g" x9 W ^% p% n4 I• Metric Unit: micrometer 10-6 m7 ~" c# D9 {6 u# g
• Sample 250 micro-inch = 6.3 micrometer
' O4 E3 U3 F; q$ l8 v6 }# Z+ m+ v(250X25.4X10-3)
9 h9 ^$ g, H6 B |* N$ ]9 j& v1 g• 250 micro-inch – forging surface4 B0 ]6 V# P+ T/ ]8 n1 }
• 125 rough machine, 32 fine machine8 [" i' z/ `" p- h
( e2 [* u- M1 t, z3 ?: G3 w) m5 FInch size O-ring+ ?9 f/ r- O; [
• O-ring number 232# l6 o" ]) ]- d A) P' p: P
• nominal size 2.75”x3”x1/8”
5 U$ Y1 k8 }8 ~• Actual size 2.734”x3.012”x0.139”* a! g0 L1 B; h8 d: {0 A3 c
• Static surface seal groove depth 0.101~0.107 about 25% squeeze
: t8 R' q0 o3 U7 {• One of OD or ID is close standard size2 t8 c3 Z. U9 P8 c* a3 c
/ Z/ U7 D: g9 ]1 V
http://www.newmaple.com/forumdisplay.php?fid=28 |
|
狗仔卡
发表于 2007-11-24 13:32
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡
