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1、BRITISH STANDARD BS 7568-18: 1992 ISO 9448-2: 1991 Press tools Part 18: Guide bushes Gliding bushes, plain, type 1 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-18:1992 This British Standard, having b
2、een prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 August 1992 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference MTE
3、/12 Draft for comment 89/79318 DC ISBN 0 580 20952 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/12, upon which the following bodies were
4、 represented: Advanced Manufacturing Technology Research Institute Amalgamated Engineering Union Gauge and Tool Makers Association Coopted member Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:00 GM
5、T+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-18:1992 BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Dimensions1 3Material and corresponding hardness1 4Designation1 Annex A (informative) BibliographyInside back cover Figure 11 Table 12 Licensed Co
6、py: London South Bank University, London South Bank University, Fri Dec 08 11:39:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-18:1992 ii BSI 10-1999 National foreword This Part of BS 7568 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committ
7、ee. It is identical with ISO 9448-2:1991 “Tools for pressing Guide bushes Part 2, Form A, gliding bushes, plain, type 1”, prepared by Technical Committee ISO/TC29, Small tools, and published by the International Organization for Standardization (ISO). A British Standard does not purport to include a
8、ll the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i an
9、d ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University
10、, Fri Dec 08 11:39:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-18:1992 BSI 10-19991 1 Scope This part of ISO 9448 specifies the main dimensions and tolerances, in millimetres, of guide bushes of form A, plain gliding bushes, type 1, intended for use in press tools and to be mounted in the
11、clamp plate by means of interference fit. It gives guidance on the materials, and specifies the hardness and the designation of bushes in accordance with this part of ISO 9448. 2 Dimensions See Figure 1 and Table 1. Details not stated such as chamfers, radii, lubrication grooves, etc., are left to t
12、he manufacturers discretion. 3 Material and corresponding hardness The material is left to the manufacturers discretion and the hardness shall be 60HRC. 4 Designation A guide bush in accordance with this part of ISO 9448 shall be designated by a) “Guide bush” b) a reference to this part of ISO 9448;
13、 c) its form; d) its guiding diameter, D1, in millimetres; e) its length, l1, in millimetres. EXAMPLE A guide bush of form A, plain gliding bush, type 1, of guiding diameter D1 = 12 mm and of length l1 = 25 mm is designated as follows: Guide bush ISO 9448-2 A 12 25 +2 0 Figure 1 Licensed Copy: Londo
14、n South Bank University, London South Bank University, Fri Dec 08 11:39:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-18:1992 2 BSI 10-1999 Table 1 l1 D1 G6G5 12162025324050 D2 n6a nom.tol.22283240485870 25 32 40 50 63 80 100 125 160 NOTE 1X, standardized dimension. NOTE 2To prevent an incor
15、rect assembly of the upper and lower plates of the die set in relation to each other, the following values of D1 are recommended: 11, 15, 19, 24, 30, 38 and 48. a Intended to fit in a hole having a tolerance H7. When the bushes are glued, the tolerance j6 is permitted. 2,0 2,5 3 4 3 5 Licensed Copy:
16、 London South Bank University, London South Bank University, Fri Dec 08 11:39:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-18:1992 BSI 10-1999 Annex A (informative) Bibliography 1 ISO 6508:1986, Metallic materials Hardness test Rockwell test (scales A B C D E F G H K). 2 ISO 9448-1:1991, To
17、ols for pressing Guide bushes Part 1: Forms. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-18: 1992 ISO 9448-2: 1991 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is t
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26、de designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI