|
|
[i=s] 本帖最后由 easylife 于 2010-1-15 13:00 编辑 [/i]) \ z& q8 f3 u" b
1 ~+ _9 m; ]9 {0 C% m8 W- N& W! `, u
Geometrical Dimensioning and Tolerancing for Design,Manufacturing and Inspection. A3 ?+ l4 H) p% a2 H7 Y
1 ]: k# i- M( y7 O N4 o1 N3 I0 w5 p, |3 X- {6 e$ n1 w
/ w( {$ t" I7 q- e0 ~8 p! h
" z( t5 t* r% W. p
* ^% r9 ]! i$ D3 I3 t- [
) i& H! m& S& z C& D+ ^8 {
4 p/ m) G' Y. l% l. XPreface8 ]( R, o, Q' Q7 ^2 A, E
Technical developments, leading to higher performance, higher efficiency, lower pollutions- M3 O% f: u; g) _0 D8 i; h7 i
and greater reliability, and the constraints imposed by economy and the need for+ ]7 }) e: n' s# t
rationalization, greater cooperation with licensees and subcontractors, make it necessary
" p) L1 X8 D: e7 bto have completely toleranced drawings suitable for the function, for manufacturing( m+ P2 N, `8 B# X
and inspection.0 N* x# G3 r' @. B& Q% h
“Completely toleranced” means that the geometries (form, size, orientation and location)6 s0 q4 ~( G" y. E9 N
of geometrical elements of the workpiece are completely defined and toleranced.
6 A; @+ p& K3 }3 A, g' G* I, W3 zNothing shall be left to the individual judgement of the manufacturer or inspector. Only
: ~6 n3 j9 O/ iwith this approach can proper functioning be verified and the possibilities available for
8 }6 }) }; M4 Z7 S- |economization and rationalization in manufacturing and inspection be fully utilized.1 L5 Z* N ?* D
This book presents the state of the art regarding geometrical dimensioning and tolerancing.
6 q# N+ E/ e# p' v6 \) V' SIt describes the international standardization in this field, which is laid down! n" I( g- x4 D% p% h+ ?7 J& @: D x
in ISO Standards. It indicates the deviations between the American Standard ASME
2 ^( _2 z( P8 Z: f0 R; pY14.5M, the former East European Standards and the ISO Standards. It describes the
- B; W7 x% a! Padditional specifications laid down in the German Standards (DIN Standards). Possible1 d( T; k/ b* s4 X# I
further developments in the field of geometrical tolerancing are also pointed out.3 B$ ~# y- Z2 m9 R5 h
What has to be regarded for manufacturing within the geometrical dimensioning and
' p* b+ A8 x7 _3 W; ]tolerances is explained.
# z5 n \) y: V6 ?& ]1 Y* E0 OPrinciples for the inspection of geometrical deviations are given, together with a
/ ?4 m$ Q( I9 S0 s) z( `$ N' Hbasis for tolerancing suitable for inspection.
' A9 n/ s& ^* t" E4 r- wExamples for tolerancing appropriate to various functional requirements, a guide for
: E, `( a6 B% c: P5 Z% cgeometrical tolerancing, are described.
. e& x; r( U+ B: }9 v* CThis book may serve as an introduction to geometrical dimensioning and tolerancing3 @ n4 o1 ^- K& \1 R! I
for students, and may also help practitioners in the fields of design, manufacturing7 J: q2 n0 {) w+ Z1 ?
and inspection.
7 h! J' |! p0 w* k5 z) X vThe author has used his experiences gathered during the elaboration of the ISO& ^& d; m" }/ _3 p# S* f" Q' B4 M
Standards and during his lectures and discussions on geometrical dimensioning and tolerancing
, [+ B, `! X+ T- e8 E! D Kin industry and education. However, proposals for improvements are appreciated# f( |6 v- a1 I3 x2 v% n$ k5 ~
and should be directed to the publisher.
* f; Q6 c( @, u" gThe book represents the author’s understanding of the various standards and is written
$ @. ?7 z" G. K0 Jfor educational purposes. In cases of dispute, the original standards have to be
' Y* ?" W9 n, D7 m" Lconsidered. The functional cases of geometrical requirements vary over a wide range.. u d' X$ E1 C5 E+ P$ }- l
Therefore, before application in practice, it should be checked whether the presentation
; l' L6 m8 ?0 x: Ein the book fits the particular purpose in the practical case.
0 n9 C0 p) S3 N$ {1 `7 o# Z" ?$ HStandardization is a dynamic and continuous process. The standards follow the
% y* | Z1 d& k; T8 x- M, g, rdevelopment in engineering. Future changes in standardization may make it necessary+ o5 l7 `2 _- |4 c* u: g
to update some content of this book.
$ J3 p$ m9 ?* Y1 q) G3 N0 N7 `7 Wxi
& `1 w9 J: v8 \Georg Henzold was manager of the department for standardization of a manufacturer: K; ]" k/ H: n- ~9 c
of power plant machinery. He is chairman of the committee dealing with the standardization
2 s: d& J& e7 H: [& Z2 Q+ ]1 k3 Iin the field of geometrical dimensioning and tolerancing in the German% D) i' A, |0 D5 j8 f' F
Standardization Institute (DIN), and he was the former chairman of the pertinent) U3 O$ h. k3 W! z/ M
European Committee for Standardization (CEN). He is a long-time delegate in the pertinent3 ]# ~3 W1 \9 W1 ~3 e
committees of the International Standardization Organization (ISO).0 T$ L8 `3 n5 M- P C3 W9 P5 }1 o
" q0 _7 ~! T7 d B0 B" K1 s
Georg Henzold |
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有账号？注册会员
×
|
发表于 2009-11-11 20:44:46
