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1、J I S Z*3I39 78 U 4933608 0076646 I W JIS. UDC / 62.791.053.92:620.179.2 F 1 JAPANESE I NDUSTRIAL STANDARD e Method of Macro Test for Section of Spot Welded Joint JIS 7 3 I39 -1978 Translated and Published by Japanese Standards Association Printed in Japan 4s Copyright Japanese Standards Association
2、 Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 20:35:08 MSTNo reproduction or networking permitted without license from IHS -,-,- Translation without guarantee standard in Japanese is to be evidence In the event of any doubt ari
3、sing, the original J I S Zr3L39 78 m 4933b08 007bb47 3 m o o Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 20:35:08 MSTNo reproduction or networking permitted without license from IHS -,-
4、,- J I S Z*3137 78 4733608 0076648 5 H UDC 621.791.053.92:620.179.2 Nominal thickness of plate T w JAPANESE INDUSTRIAL STANDARD J I S Method of Macro T e s t for Section of Z 3139-1978 Spot Welded Joint L - P 1. Scope Under O. 8 0.8 t o 1.3 excl. 1 . 3 to 2.5 excl. 2.5 t o 3.5 excl. 3.5 t o 4.4 excl
5、. This Japanese Industrial Standard specifies the method of macro test for section of spot welded joint of metallic materials not more than 5.0 mm i n plate thickness. 20 75 20 30 100 30 40 125 40 50 150 55 50 150 70 2. Test Material and T e s t Pieces 4.4 t o 5.0 incl. 2.1 Two-plate Lap Joint The s
6、hape of test piece shall conform t o Fig. 1 and Table 1, and shall be cut out from a test materiai joined by not less than 10 continuous spot weldings as shown i n Fig. 2. In Fig, 2, the pitch of spots (Pl shall conform to the value shown i n Table 1 as the standard, but it may be adjusted as the pu
7、rpose of the test may require. Further, a single spot test piece as given i n Fig. 1 may be used, i f the purpose of the test so requires. The length (I,) of continuous spot welding test material and single spot test piece may be reduced t o 2W. 50 15 O 80 Fig. 1. Shape of T e s t Piece , I I L I Co
8、pyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 20:35:08 MSTNo reproduction or networking permitted without license from IHS -,-,- Fig. 2. Continuous Spot Welding Test Material f 2.2 Joint of
9、 Plates Different i n Thickness and Quality The test piece for the joint of plates different i n thickness and quality shall have a thickness of the base metal, whichever is less i n the product of tensile strength and the thickness. 2.3 Lap Joint of Three or More Plates The test material and test p
10、iece shall be prepared following 2.2. 2.4 Precautions for Preparing T e s t Piece Compensation for Reactive Bypass Current No adjustment for com- pensating reactive bypass current shall be made during welding operation of the test material forcontinuous spot welding, except for the case where the ma
11、chine is provided with an auto- matic switching by control equipment, o r with an automatic com- pensation. Sequence of Welding The test material shall be continuously spot welded from one end towards the other. Dressing of Electrodes materials or test pieces, the surfaces of electrode tips shall no
12、t be dressed, reformed or replaced for the period of welding at least 20 spots, for steel; o r at least 10 spots, for aluminium or its alloys. During the operation of welding test 3. Macro Test for Section 3.1 Test Method The test shall be made on the section vertical t o the surface of plate. Cut o
13、ff the section passing nearly the centre of the welded spot by suitable means, polish and etch the sectional surface and examine it for the internal defects such as the diameter of nugget, penetration, crack, and blowhole. Copyright Japanese Standards Association Provided by IHS under license with J
14、SALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 20:35:08 MSTNo reproduction or networking permitted without license from IHS -,-,- J I S Z*3139 78 W 4933608 007bb50 3 m 3 Z 3139-1978 a 3.2 Method of Measuring Diameter of Nugget and Penetration The diame- However, wh
15、ere the overlapping plates are different in thick- ter of nugget and penetration of weld shall be measured on each part shown in Fig. 3. ness, the ratio of penetration shall be expressed by the ratio of penetra- tion to the thinner plate thickness, Rati a i 1 of penetr Fig. 3. Cross Section of Nugge
16、t (a) Two-plate lap ti n of thinner plate side = yX ti 100 (%) Ratio of penetration of thicker plate side = -Z-xioo (“/o) Ti where Ti, Ta : plate thickness Ti Ratio of penetration of Tz thick plate on Ti side = X100 (% tzr tzs Ratio of penetration of Tz thick plate on Ta side = -jyX 100 (% Ratio of
17、penetration of T8 thick plate = -$-XlOO (% where ?;, T, r3 : plate thickness Tl, TaK3L37 78 4933b08 007bb52 7 = 2 3139-1978 Edition 1 Japanese Text Established by Minister of International Trade and Industry . Date of Establishment: 1962-03-01 Date of Revision: 1978-09-01 Date of Public Notice i n O
18、fficial Gazette: 1978-10-14 Investigated by: Japanese Industrial Standards Committee Divisional Council on Welding Technical Committee on Method of Inspection for Spot Weld This English translation is published by: Japanese Standards As so cia t ion 1-24 Akasaka 4 Minato-ku, Tokyo 107 Japan 0 JSA, 1981 Rinted in Tokyo by Hohbunsha Co.,Ltd. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 20:35:08 MSTNo reproduction or networking permitted without license from IHS -,-,-