1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS ISO 6751:2011 Tools for moulding Ejector pins with cylindrical headBS ISO 6751:2011 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO
2、 6751:2011. It supersedes BS ISO 6751:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MTE/12, Tools for pressing and moulding. A list of organizations represented on this committee can be obtained on request to its secretary. This publication doe
3、s not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 73919 4 ICS 25.120.30 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the author
4、ity of the Standards Policy and Strategy Committee on 30 September 2011. Amendments issued since publication Date Text affectedBS ISO 6751:2011Reference number ISO 6751:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 6751 Fourth edition 2011-09-15 Tools for moulding Ejector pins with cylindrical head Out
5、illage de moulage jecteurs tte cylindrique BS ISO 6751:2011 ISO 6751:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
6、and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland
7、ii ISO 2011 All rights reservedBS ISO 6751:2011 ISO 6751:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally car
8、ried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
9、 ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Interna
10、tional Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the
11、elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6751 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 8, Tools for pressing and moulding. This fourth edition cancels and rep
12、laces the third edition (ISO 6751:1998), of which it constitutes a minor revision. In particular, the indication of surface textures has been updated in accordance with ISO 1302:2002. BS ISO 6751:2011BS ISO 6751:2011 INTERNATIONAL STANDARD ISO 6751:2011(E) ISO 2011 All rights reserved 1Tools for mou
13、lding Ejector pins with cylindrical head 1 Scope This International Standard specifies the dimensions and tolerances, in millimetres, of ejector pins with cylindrical head which are used in compression and injection moulds and in die casting dies. It also gives material guidelines and hardness requi
14、rements, and specifies the designation of ejector pins with cylindrical head. Flat ejector pins are specified in ISO 8693 and shouldered ejector pins are specified in ISO 8694. 2 Dimensions The dimensions of ejector pins shall be in accordance with the indications of Figure 1 and Tables 1 and 2. Sur
15、face roughness values in micrometres Key 1 edge without burrs aRa 0,8 for hot worked steel. Ra 0,4 for alloyed cold worked steel. bProviding the ejector pin with an alternative surface roughness or a small variation on the diameter, D 1 , over a certain length is permitted. Figure 1 Ejector pin with
16、 cylindrical head BS ISO 6751:2011 ISO 6751:2011(E) 2 ISO 2011 All rights reservedTable 1 Dimensions of ejector pins with cylindrical head of hot worked steel Dimensions in millimetres D 1g6 D 2L2 0 HR Standardsize Oversize 0 0,2 100 125 160 200 250 315 400 500 630 800 1 000 0 0,05 0,2 0 2 4 X X X X
17、 2 0,2 2,2 X X 2,5 5 X X X X 0,3 2,7 X X 3 6 X X X X X X 3 3,2 X X X 3,5 7 X X X X X X 3,7 X X X 4 8 X X X X X X X 4,2 X X X X 5 10 X X X X X X X X 5,2 X X X X 6 12 X X X X X X X X X 5 0,5 6,2 X X X X X 8 14 X X X X X X X X X X 8,2 X X X X X 10 16 X X X X X X X X X X X 10,2 X X X X X X 12 18 X X X X
18、 X X X X X X 70,8 12,5 X X X X X X X X X X 16 22 X X X X X X X X X 20 26 X X X X X X X X X 8 1 25 32 X X X X X X X X 10 32 40 X X X X X X X BS ISO 6751:2011 ISO 6751:2011(E) ISO 2011 All rights reserved 3Table 2 Dimensions of ejector pins with cylindrical head of alloyed cold worked steel Dimensions
19、 in millimetres D 1g6D 2L2 0 HR Standardsize Oversize 0 0,2 80 100 125 160 200 250 315 400 0 0,05 0,2 0 1,5 3 X X X X 1,5 0,2 1,6 X X X X 2 4 X X X X X 2 2,2 X X X 2,5 5 X X X X X 0,3 2,7 X X X 3 6 X X X X X X 3 3,2 X X X 3,5 7 X X X X X X 3,7 X X X 4 8 X X X X X X X 4,2 X X X X 5 10 X X X X X X X 5
20、,2 X X X X 6 12 X X X X X X X 5 0,5 6,2 X X X X 8 14 X X X X X X X X 8,2 X X X X 10 16 X X X X X X X 10,2 X X X X 12 18 X X X X X X X 70,8 12,5 X X X X X X X 16 22 X X X X X X X 20 26 X X X X X X 8 1 3 Material and hardness Ejector pins with cylindrical head shall be made of hot worked steel or allo
21、yed cold worked steel. The hardness of the shaft and head shall conform to the indications of Table 3. BS ISO 6751:2011 ISO 6751:2011(E) 4 ISO 2011 All rights reservedTable 3 Material and hardness Material Hardness aShaft Head Hot worked steel Min. 1 400 MPa core strength min. 950 HV 0,3 (45 5) HRC
22、hot-forged Alloyed cold worked steel (60 2) HRC aThe point at which hardness is measured is left to the manufacturers discretion. 4 Designation Ejector pins with cylindrical head according to this International Standard shall be designated by: a) “ejector pin with cylindrical head”; b) reference to
23、this International Standard, i.e. ISO 6751; c) ejector pin diameter, D 1 , in millimetres; d) ejector pin length, L, in millimetres; e) ejector pin material. EXAMPLE The designation for an ejector pin with cylindrical head of diameter D 1= 2 mm, of length L = 100 mm and of hot worked steel is as fol
24、lows: Ejector pin with cylindrical head ISO 6751 - 2 - 100 - Hot worked steel BS ISO 6751:2011 ISO 6751:2011(E) ISO 2011 All rights reserved 5Bibliography 1 ISO 1302:2002, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation 2 ISO 8693, Tools for
25、moulding Flat ejector pins 3 ISO 8694, Tools for moulding Shouldered ejector pins BS ISO 6751:2011 ISO 6751:2011(E) ICS 25.120.30 Price based on 5 pages ISO 2011 All rights reserved This page deliberately left blankBSI is the independent national body responsible for preparing British Standards and
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