JIS-B-2706-2001-R2005-ENG.pdf
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1、t J IS JAPANESE I N DUSTR IAL STANDARD Translated and Published by Japanese Standards Association Coned disc springs ICs 21.160 Descriptors : laminated springs Reference number : JIS B 2706 : 2001 (E) 10 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Em
2、ployees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:50:37 MDTNo reproduction or networking permitted without license from IHS -,-,- B 2706 : 2001 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of Economy, Trade and I
3、ndustry through deliberations at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by the Japan Spring Manufacturers Association (JSMA)/the Japanese Standards Association (JSA) with the draft being attached, based on the pro
4、vision of Article 12 Clause 1 of the Industrial Standardization Law. Consequently JIS 3 2706 : 1995 is replaced with this Standard. Date of Establishment: 1972-07-01 Date of Revision: 2001-03-20 Date of Public Notice in Official Gazette: 2001-03-21 Investigated by: Japanese Industrial Standards Comm
5、ittee Divisional Council on Machine Elements JIS B 2706 :2001, First English edition published in 2001-10 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the
6、 final authority. ! O JSA2001 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 and microfilm, without permission in writing from the publisher. Printed in Japan Cop
7、yright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:50:37 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD Standard JIS G 3311 JIS B 2706 :
8、 2001 Material SGOCM, S65CM, S70CM, SKEiM, SUPlOM Coned disc springs JIS G 4802 1 Scope This Japanese Industrial Standard specifies the coned disc springs used in a single unit and in a combined form of plural coned disc springs (hereafter re- ferred to as ?springs?). SGOC-CSP, S65C-CSP, S7OC-CSP, S
9、K5-CSP, SUP10-CSP 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amendments) indicated below shall be applied. JIS B 0103 Springs? vocabulary JIS
10、 G 3311 Cold rolled special steel strip JIS G 4801 Spring steels JIS G 4802 Cold-rolled steel strips for springs JIS Z 2244 Vickers hardness test-Test method a JIS Z 2245 Rockwell hardness test-Test method 3 Definitions For the purposes of this Standard the definitions given in JIS B 0103 apply f 4
11、Materials The materials for the springs are given in Table 1. Other materials, if used, shall be in accordance with the agreement between the parties concerned. I JISG4801 I SUP10 I 5 Calculation in design 5.1 Symbols and units used in calculation as given in Fig. 1 and Table 2. Copyright Japanese S
12、tandards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:50:37 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 B 2706 : 2001 + 4 ? m R s Note (1) The chamfered volume at the corner part I
13、I shall be at least equal to R at the corner parts I and III. Fig. 1 Form of spring and symbols for each part Table 2 Symbols and units used in calculation Symbol D d t H o h n E V P S O1 O 1 1 0111 ON k PG SG n m L o R Unit mm mm mm mm mm Nimm2 - N mm N/mm2 Nimm2 Nimm2 N/mm2 Nlmm N mm - - mm mm Con
14、tents of symbol External diameter of spring Internal diameter of spring Thickness of spring Free height of spring Total deflection of pring (-. a + l 2 - a-l lna 5.2.2 Load The load P in which a correction term ( (D - D-d d ) - 3R ) is to be inserted taking the chamfering R at the corner part into a
15、ccount shall be as follows: . . (1) D-d a P= (D-d)-3R 1-V C1D 5.2.3 Stress The stresses at the positions I, II, III and IV shown in Fig. 1 shall be as follows. Positive sign indicates to be tensile stress and negative sign to be compressive stress. . . (2) 4E 0 1 =- 1-V CID . (3) 4E 011 = - 1-V C1D
16、(4) 4E 0111 = - * - 1-V OCID (5) 4E 5.2.4 Spring constant The spring constant which is non-linear can be obtained by differentiating the formula (1). ho 3 ( 6 J (6) 2 k=-= dP D-d .-.-.(+) 4E t3 -3-.-+- . +1 . d6 (D-d)-3R 1-V CID tt 2t 6 Load characteristics 6.1 Characteristics of single unit 6.1.1 C
17、haracteristic curve The characteristics of the load and deflection of spring depend on the ratio of holt and make the non-linear curves as shown in Fig. 2. The point S on the Figure is a closely contact load in calculation and the load at the point S is, from the formula (11, as given in the followi
18、ng: a Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:50:37 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 B 2706 : 2001 (7) 4E t3ho (D-d)-3R 1-v2 CID2 .- *-
19、 D-d = 1.2 1 .o 0.8 Load ratio pIp&h, 0.6 0.4 0.2 O Deflection ratio 6lho Fig. 2 Load characteristics 6.1.2 Characteristics of calculated values and actually measured values When measuring the load characteristics between the load and the deflection of spring on parallel surface tables, the load of
20、spring is, as shown in Fig. 3, lower than the cal- culated value due to the initial deflection and the like until the deflection of spring comes to 0.3ho to 0.4ho and becomes higher than the calculated value when coming to the neighbourhood of ho exceeding 0.75h0 (maximum use limit) due to the chang
21、e of the fulcrum of load. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:50:37 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 B 2706 : 2001 1.2 1 .o 0.8 0.6
22、 0.4 0.2 O Deflection ratio 6/ho Fig. 3 Characteristics of calculated values and measured values (nominal H50) 6.2 Load characteristics at the time of combination For springs, various load characteristics can be obtained from the various combination. 6.2.1 Piling in parallel When piling the springs
23、up in the same direction as shown in Fig. 4, the load multiplied by the number of springs piled up becomes larger. Where the piled unit number is n, . load pG = n x p (8) deflection & = 8 (9) . . free height of spring Lo = Ho + (n - 1) t (10) Load N n=4 n=2 n= 1 O ho Deflection mm 4 springs in paral
24、iei (n=4) 4 2 springs in parallel n=2) 4. j Single spring (n = i) Fig. 4 Piling in parallel, Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:50:37 MDTNo reproduction or networking permit
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