|
|
[i=s] 本帖最后由 easylife 于 2010-1-15 13:00 編輯 [/i]% k, i- D* I" h( {3 {3 \1 ]5 @9 b
: i1 g" G& [ J# j8 J" H% e
Geometrical Dimensioning and Tolerancing for Design,Manufacturing and Inspection+ ], `: g3 L3 z$ j! k
" L3 ^, K L9 T) K% U \. [$ N
7 y% p( a( S5 H/ }+ }( }
7 f& X4 q7 a+ G5 X7 o/ a4 o, R9 G. ^# t0 A% `3 v
) p* ?" }& n% P; C# f; W3 c
0 [! G Q3 e" F% T6 J5 a8 S+ Z, T, U& \1 l7 F' C
Preface
- i# v* r6 o( n5 ]8 Z. N: JTechnical developments, leading to higher performance, higher efficiency, lower pollutions# j& O5 N' E7 i0 i7 }0 ~
and greater reliability, and the constraints imposed by economy and the need for
) [ s% p" b8 M& H6 hrationalization, greater cooperation with licensees and subcontractors, make it necessary; B% [! }( T+ s+ h2 B
to have completely toleranced drawings suitable for the function, for manufacturing
( d; ~- p. u1 p' x0 s$ b6 sand inspection.: s. e i2 r2 o' v7 r2 o% }. T! z
“Completely toleranced” means that the geometries (form, size, orientation and location)* J& o4 x4 Y# q0 X; \
of geometrical elements of the workpiece are completely defined and toleranced." h( ]6 A& Z% M9 n8 K
Nothing shall be left to the individual judgement of the manufacturer or inspector. Only
6 x; \$ T C5 m. g5 r2 S' D; Nwith this approach can proper functioning be verified and the possibilities available for7 r8 O' @8 E# A
economization and rationalization in manufacturing and inspection be fully utilized.) w0 i6 {. j# p! O; p" c; X% q6 i! P
This book presents the state of the art regarding geometrical dimensioning and tolerancing.
3 W0 ]' Y; d( b# PIt describes the international standardization in this field, which is laid down9 a0 L/ F8 ~/ m& D% `
in ISO Standards. It indicates the deviations between the American Standard ASME' z* u* J- g! _& O
Y14.5M, the former East European Standards and the ISO Standards. It describes the
5 G( r/ s8 m- `* s" r3 f( @- J+ uadditional specifications laid down in the German Standards (DIN Standards). Possible. d1 \. |. H$ Y2 m
further developments in the field of geometrical tolerancing are also pointed out.
9 o) e5 d* d1 q) v2 GWhat has to be regarded for manufacturing within the geometrical dimensioning and
. C2 E4 ?3 _3 j: U. J& i3 Wtolerances is explained.) F4 y+ G* w, b8 h2 u1 N' f
Principles for the inspection of geometrical deviations are given, together with a
* Q7 K3 {$ {" u8 ]. f6 Xbasis for tolerancing suitable for inspection.! l5 ~2 P, `+ n7 d
Examples for tolerancing appropriate to various functional requirements, a guide for' T* g' W. r" I0 U
geometrical tolerancing, are described.
; u5 B) q. D8 g1 R1 WThis book may serve as an introduction to geometrical dimensioning and tolerancing
4 x; @2 K- P6 kfor students, and may also help practitioners in the fields of design, manufacturing
! |5 M& |3 F7 D6 a- g1 d* uand inspection.; K" K+ i0 Z" V d& D. E
The author has used his experiences gathered during the elaboration of the ISO
* ^- L( [8 ^/ s( x7 ]6 BStandards and during his lectures and discussions on geometrical dimensioning and tolerancing
) B0 h- V" e* h$ N8 b7 vin industry and education. However, proposals for improvements are appreciated
) [ G. ?$ v1 k' Q8 Zand should be directed to the publisher.
, @) n4 H' m2 u1 @$ K* F. qThe book represents the author’s understanding of the various standards and is written9 ^2 J& o1 s' I/ j3 [9 {2 i/ I
for educational purposes. In cases of dispute, the original standards have to be' j8 }8 o- I7 g( j
considered. The functional cases of geometrical requirements vary over a wide range.& X( Z8 ]! a6 |3 t! m; }
Therefore, before application in practice, it should be checked whether the presentation
) f; o0 h: v+ x4 w% k0 O$ l+ tin the book fits the particular purpose in the practical case.. m; M9 e4 u7 T* }
Standardization is a dynamic and continuous process. The standards follow the5 e1 q0 j! |* {
development in engineering. Future changes in standardization may make it necessary
; h" y8 M E4 M/ o' {" T/ D& v. Gto update some content of this book.: g4 L/ Z% _* k0 k1 s3 x
xi6 E9 c( e: x- \# ]: Z% o5 y
Georg Henzold was manager of the department for standardization of a manufacturer
$ w; M5 [( E- S A/ T: w& A( nof power plant machinery. He is chairman of the committee dealing with the standardization
0 y2 d4 {9 w ^5 Pin the field of geometrical dimensioning and tolerancing in the German
) |: x7 ]6 V4 Q$ N1 OStandardization Institute (DIN), and he was the former chairman of the pertinent
w8 \% p' p$ XEuropean Committee for Standardization (CEN). He is a long-time delegate in the pertinent$ s* H" v" u2 Z; j4 T
committees of the International Standardization Organization (ISO).
0 B6 S) `2 |9 j: z
8 A' Q% `0 D, G9 f! D# nGeorg Henzold |
|
發(fā)表于 2009-11-11 20:44:46
QQ好友和群
收藏
淘帖
問(wèn)題專(zhuān)業(yè)，描述清楚
伸手黨/灌水/看不懂
樓主
