JIS-B-8841-2004-ENG.pdf
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1、J IS JAPANESE I NDUSTR IAL STANDARD Translated and Published by Japanese Standards Association Toughness test of link chains- Impact test method of chain links ICs 53.020.30 Reference number : JIS B 8841 : 2004 (E) PROTECTED BY COPYRIGHT 11 s Copyright Japanese Standards Association Provided by IHS
2、under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:54:36 MDTNo reproduction or networking permitted without license from IHS -,-,- B 8841 : 2004 Foreword This translation has been made based on the original Japanese Industrial Standard establishe
3、d by the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Attention is drawn to the possibility that some parts of this Standard may conflict with a patent right, application for a pate
4、nt after opening to the public, utility model right or application for registration of utility model after opening to the public which have technical properties. The relevant Minister and the Japanese Industrial Standards Committee are not responsible for identifying the patent right, application fo
5、r a patent after opening to the public, utility model right or application for registration of utility model after opening to the public which have the said technical properties. Date of Establishment: 2004-11-20 Date of Public Notice in Official Gazette: 2004-11-22 Investigated by: Japanese Industr
6、ial Standards Committee Standards Board Technical Committee on Logistics and Distribution of Goods JIS B 8841 :2004, First English edition published in 2005-04 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAhT In the event of any doubts ar
7、ising as to the contents, the original JIS is to be the final authority. O SA 2005 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publis
8、her. Printed in Japan AT PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:54:36 MDTNo reproduction or networking permitted without license from IHS -,-,- B 8841 : 2
9、004 Contents Page Introduction . 1 2 3 4 5 6 6.1 6.2 6.3 6.4 7 Scope Normative references Definitions J-shaped test piece Testing machine . Test Test temperature . Fixing method of J-shaped test piece How to obtain absorbed energy E (J) to be required for breaking How to obtain impact value of chain
10、 link . J-shaped test piece Record Annex 1 (normative) Impact testing machine of chain link 1 1 1 1 2 4 4 4 4 5 6 6 9 (i) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2
11、007 07:54:36 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS B 8841 : 2004 Toughness test of link chains- Impact test method of chain links Introduction This Japanese Industrial Standard specifies the toughness test method for evaluating the
12、 safety, materials, low-temperature performance of link chains. In addition, this Standard does not have the corresponding International Stan- dard. 1 referred to as “test method”) for the toughness test of link chains. Scope Remarks : This Standard specifies the impact test method of chain links (h
13、ereafter The chain link impact testing machine is specified in annex 1. 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions (including amendments) indicated below shall be applie
14、d. JIS B 0148 Lifting equipments-Terminology JIS 3 8812 Link chain for chain hoists JIS G 0202 Glossary of terms used in iron and steel (testing) JIS Z 2242 Method of impact test for metallic materials 3 Definitions 0148 and JIS G 0202 and the following definitions apply. For the purposes of this St
15、andard, the definitions given in JIS B chain link each link which constitutes a link chain J-shaped test piece from link chains into a J shape wire diameter of J-shaped test piece (d) portion of a chain link (see figure i) chain link impact testing machine pact test of a chain link rated capacity en
16、ergy (AN) testing machine absorbed energy of J-shaped test piece (E) energy required for breaking a J-shaped test piece in performing the test impact value of chain link (T,) the value calculated according to the follow- ing formula from the absorbed energy (E) of a J-shaped test piece obtained by p
17、erforming the test a test piece prepared by forming the chain link sampled the wire diameter of the parallel the testing machine used for the im- energy designated by the manufacturer of the (1) E d3 T, = - where, T, : impact value of chain link (J/mm3) E : absorbed energy of J-shaped test piece (J)
18、 PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:54:36 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 B 8841 : 2004 d : wire diameter
19、of J-shaped test piece (actual mea- surement value) (mm) h) distance between test-piece support and impact point (h) the distance between the top surface of test-piece support and the blade edge when the blade edge comes in contact with the J-shaped test piece at the impact point (see fig- ure 1 and
20、 figure 3) impact point the point where the blade edge of the pendulum(1) hung freely comes in contact with the J-shaped test piece fixed at the test-piece support (see figure 3) Note (1) Locate the blade edge at the lowest point of the pendulum. i) 4 J-shaped test piece a) The J-shaped test piece t
21、o be used shall be sampled from link chains(2) used as a product. The shape of the J-shaped test piece shall be as shown in figure 1. The dimen- sions shall be as given in table 1. b) Table 1 Dimensions of J-shaped test piece Items Distance between the test-piece support and the impact point (h) Dep
22、th of V notch (a) Angle of V notch (a) Radius at the edge of V notch (r) Distance between the apex of chain link and the edge of V notch (b) Dimensions 1.13d k0.3 (mm) 0.25M I 0.05 (mm) 4512 (“1 0.25 t 0.025 (mm) 2.ld t 0.1 (mm) c) The V notch and the impact point shall be located at the parallel po
23、rtion of a chain link. Note (2) For example, the link chain which conforms to JIS B 8812. Remarks 1 The J-shaped test piece shall be prepared by removing the weld of a link chain. 2 Do not overheat the J-shaped test piece when preparing it. PROTECTED BY COPYRIGHT Copyright Japanese Standards Associa
24、tion Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:54:36 MDTNo reproduction or networking permitted without license from IHS -,-,- Impact force - Cross-section A-A Cross-section B-B Apex Figure 1 J-shaped test piece 3 B 8841
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