BS-7568-12-1992 ISO-10069-1-1991.pdf

BRITISH STANDARD BS 7568-12: 1992 ISO 10069-1: 1991 Press tools Part 12: Elastomer pressure springs General specification Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 This British Standard, having been 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 1 May 1992 © BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference MTE/12 Draft for comment 90/74033 DC ISBN 0 580 20767 6 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 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 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 © BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative reference1 3Dimensions1 4Materials and their hardness5 5Designation5 6Marking5 Annex A (informative) Examples of suitable applications6 Figure 1 Pressure spring1 Figure 2 Elastomer pressure spring4 Figure A.1 Single elastomer pressure spring6 Figure A.2 Double elastomer pressure spring with one spring collar7 Figure A.3 Double elastomer pressure spring with three spring collars8 Table 1 General dimensions of elastomer pressure springs2 Table 2 Values of the load F, and the difference between the free and fully compressed lengths, l2, for elastomer springs in accordance with Table 13 Table 3 Dimensions of the counterbores d4 as a function of the diameters d1 and d34 Publication(s) referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 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 Committee. It is identical with ISO 10069-1:1991 “Tools for pressing Elastomer pressure springs Part 1: General specification”, 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 all 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. Cross-reference International StandardCorresponding British Standard ISO 10069-2:1991BS 7568 Press tools Part 13:1992 Elastomer pressure springs Specification of accessories (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 8, 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, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 © BSI 10-19991 1 Scope This part of ISO 10069 specifies the dimensions, in millimetres, of elastomer pressure springs intended for use in press tools, and the diameters, in millimetres, of counterbores for these pressure springs. It also gives information concerning materials and their hardness, and specifies the designation of springs in accordance with this part of ISO 10069 together with the marking of packages. Examples of suitable applications are given in Annex A. Dimensions of accessories (spring collars and pilot pins) are specified in ISO 10069-2. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of ISO 10069. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 10069 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 10069-2:1991, Tools for pressing Elastomer pressure springs Part 2: Specification of accessories. 3 Dimensions 3.1 Elastomer pressure springs See Figure 1 and Table 1 and Table 2. Figure 1 Pressure spring Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 2 © BSI 10-1999 Table 1 General dimensions of elastomer pressure springs d1d2 d3, max for l2, max l1 CRaPURa1620253240506380100125160 166,521,620××× 208,52725×××× 2510,533,831,3×××× 32 13,5 43,240×××× 405450××××× 50 17 67,562,5×××××× 638578,8××××××× 80 21 108100××××××× 100135125××××××× 12527168,8 156,3×××××××× a See clause 4 for an explanation of these abbreviations. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 © BSI 10-19993 Table 2 Values of the load F, and the difference between the free and fully compressed lengths, l2, for elastomer springs in accordance with Table 1 d1l1 CRPUR d1l1 CRPUR F max. kN l2a max. F max. kN l2b max. F max. kN l2a max. F max. kN l2b max. 165,643211,28 16200,371,25401410 258,756,255017,512,5 165,6463631022,052115,75 20 20 0,5 7 2 5802820 258,756,251003525 3211,2812543,7531,25 20753211,28 25 25 0,8 8,75 3,5 6,25401410 3211,285017,512,5 40141080631822,053815,75 3211,28802820 32 40 2,3 14 4,5 101003525 5017,512,512543,7531,75 6322,0515,753211,28 3211,28401410 4014105017,512,5 40503,617,58,512,5100632722,056515,75 6322,0515,75802820 8028201003525 3211,2812543,7531,75 4014103211,28 50 50 5,5 17,5 13 12,5401410 6322,0515,755017,512,5 802820 125 63 42 22,05 100 15,75 1003525802820 1003525 12543,7531,75 1605640 a l 2, max = 0,35 l1 b l 2, max = 0,25 l1 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 4 © BSI 10-1999 3.2 Counterbores for elastomer pressure springs See Figure 2 a) and Figure 2 b) and Table 3. Table 3 Dimensions of the counterbores d4 as a function of the diameters d1 and d3 Figure 2 Elastomer pressure spring d11620253240506380100125 d322273443546885108135169 d424303848617594118150188 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 © BSI 10-19995 4 Materials and their hardness The material may be either an elastomer based on chloroprene rubber (CR) with a nominal hardness of 70 Shore A or an elastomer based on polyurethane rubber (PUR) with a nominal hardness of 90 Shore A. Both these materials shall have a temperature resistance up to approximately 80 °C. 5 Designation An elastomer pressure spring in accordance with this part of ISO 10069 shall be designated by a) “Elastomer pressure spring”; b) reference to this part of ISO 10069 (i.e. ISO 10069-1); c) its diameter, d1; d) its length, l1; e) the material (CR or PUR). EXAMPLE An elastomer pressure spring, made of elastomer based on chloroprene rubber (CR), of diameter d1= 16 mm and length l1= 20 mm is designated as follows: Elastomer pressure spring ISO 10069-1 16 × 20 CR 6 Marking Elastomer pressure springs in accordance with this part of ISO 10069 shall be marked on the smallest packing unit with the following information: a) their diameter, d1; b) their length, l1; c) the material symbol (CR or PUR). Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 6 © BSI 10-1999 Annex A (informative) Examples of suitable applications Examples of suitable applications are shown in Figure A.1 to Figure A.3. Figure A.1 Single elastomer pressure spring Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 © BSI 10-19997 Figure A.2 Double elastomer pressure spring with one spring collar Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 8 © BSI 10-1999 Figure A.3 Double elastomer pressure spring with three spring collars Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12:1992 © BSI 10-1999 Publication(s) referred to See national foreword. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:25:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-12: 1992 ISO 10069-1: 1991 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. 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