|
|
[i=s] 本帖最后由 easylife 于 2010-1-15 13:00 编辑 [/i]
4 n$ V! L' ]; X* Y/ I" O9 A, V1 L' m# l
Geometrical Dimensioning and Tolerancing for Design,Manufacturing and Inspection( d2 D( ^/ x+ u1 d5 V, W) h* K; \8 c
0 M! h/ i8 {4 `! E* `
, N: n& E; {. F# ^! l% X* d
6 p( _" o; g' D7 _: @
6 C$ @. @6 y8 r
4 a6 [# Q8 ? ~; c2 A* w4 \& N: c$ @* c
5 M% t$ c" O8 q* P
Preface
/ K; E" [/ y4 E: t% ETechnical developments, leading to higher performance, higher efficiency, lower pollutions# o1 _0 q% i5 c! r) @. i. N
and greater reliability, and the constraints imposed by economy and the need for2 \( n' W1 Y& i- r1 @0 b
rationalization, greater cooperation with licensees and subcontractors, make it necessary: {& G- S4 A4 }. R
to have completely toleranced drawings suitable for the function, for manufacturing( {- o7 k# h4 X1 a( ^: q
and inspection.
9 i @% \# e/ b“Completely toleranced” means that the geometries (form, size, orientation and location). Y% n8 s; o* K# R7 a% X: M# a
of geometrical elements of the workpiece are completely defined and toleranced.
! W+ ~ L5 s; s" b7 PNothing shall be left to the individual judgement of the manufacturer or inspector. Only
2 c# d! n: R3 }3 R9 z4 Ywith this approach can proper functioning be verified and the possibilities available for
3 k/ l" b0 J6 weconomization and rationalization in manufacturing and inspection be fully utilized.1 T2 X, C" L3 c% l
This book presents the state of the art regarding geometrical dimensioning and tolerancing. R1 e; `6 Q3 J
It describes the international standardization in this field, which is laid down7 i) o, d) [% R1 u9 Z
in ISO Standards. It indicates the deviations between the American Standard ASME
! L+ b( c- T2 t! y3 _Y14.5M, the former East European Standards and the ISO Standards. It describes the) Q& I2 `: H: Y
additional specifications laid down in the German Standards (DIN Standards). Possible
- T `6 ^4 r# ^5 b' Z& q; g! G+ ?further developments in the field of geometrical tolerancing are also pointed out.
( H3 ?# |/ n: m* b5 wWhat has to be regarded for manufacturing within the geometrical dimensioning and
+ G; I/ F2 |/ U5 Ktolerances is explained.' d& K# E1 Y( F! i2 _+ G$ N0 `: B
Principles for the inspection of geometrical deviations are given, together with a2 K. l/ B$ e' M0 \! v) i
basis for tolerancing suitable for inspection.3 g5 k [* q) G) c/ M6 G5 R$ V
Examples for tolerancing appropriate to various functional requirements, a guide for
u6 M3 n! X! n2 c% ogeometrical tolerancing, are described.8 U) e8 C$ X" d9 R
This book may serve as an introduction to geometrical dimensioning and tolerancing
& P _. ]3 u8 l& ^: gfor students, and may also help practitioners in the fields of design, manufacturing
# r ]. P6 u9 M, I* E6 \and inspection.8 N6 y( J/ I8 d1 h4 J) t- c N
The author has used his experiences gathered during the elaboration of the ISO2 j+ d; O8 F- _, |5 R8 x+ ~* m
Standards and during his lectures and discussions on geometrical dimensioning and tolerancing7 U1 \: C! i' c+ u1 i+ v& U" [
in industry and education. However, proposals for improvements are appreciated% Y# i& u4 R4 f& L, B4 d) ?
and should be directed to the publisher.
) Q' g6 ]% [! r# L7 tThe book represents the author’s understanding of the various standards and is written5 y, z7 S9 R! q, t* r. Q# a/ V
for educational purposes. In cases of dispute, the original standards have to be. I5 L, m+ X r9 k+ m; j, @+ _
considered. The functional cases of geometrical requirements vary over a wide range.( T, y* c+ C$ F
Therefore, before application in practice, it should be checked whether the presentation6 |& R* @# ~& O/ Z8 U
in the book fits the particular purpose in the practical case.
/ ^/ d5 b! p* U! L6 ~5 G+ cStandardization is a dynamic and continuous process. The standards follow the" f( ~; y, V1 K: V2 E! B- a3 R
development in engineering. Future changes in standardization may make it necessary
0 ?+ z% @3 q# J( gto update some content of this book.
" `: s; N0 j8 mxi
* b3 f5 Z3 u, s+ i- E1 N4 N) _6 g: [Georg Henzold was manager of the department for standardization of a manufacturer( B2 R- s: i- q1 C
of power plant machinery. He is chairman of the committee dealing with the standardization
?6 X0 `6 d+ j( E$ d! Fin the field of geometrical dimensioning and tolerancing in the German. B- w6 p* _% J$ u7 a
Standardization Institute (DIN), and he was the former chairman of the pertinent( W# N% b0 V! x" a6 o
European Committee for Standardization (CEN). He is a long-time delegate in the pertinent
! P/ ~3 j3 f d' x; v. [. k2 Acommittees of the International Standardization Organization (ISO).+ P9 [, m9 @# V- r
& `3 }$ O. F/ W7 i$ Y2 XGeorg 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
