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GB/T 39081-2020: Test method of cross tension test for resistance spot and embossed projection welds
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Test method of cross tension test for resistance spot and embossed projection welds
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GB/T 39081-2020
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Basic data | Standard ID | GB/T 39081-2020 (GB/T39081-2020) | | Description (Translated English) | Test method of cross tension test for resistance spot and embossed projection welds | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J33 | | Classification of International Standard | 25.160.40 | | Word Count Estimation | 14,134 | | Date of Issue | 2020-07-21 | | Date of Implementation | 2021-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39081-2020: Test method of cross tension test for resistance spot and embossed projection welds
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method of cross tension test for resistance spot and embossed projection welds
ICS 25.160.40
J33
National Standards of People's Republic of China
Cross tensile test method for resistance spot welding and projection welding joints
(ISO 14272.2016, Resistancewelding-Destructivetestingofwelds-
2020-07-21 released
2021-02-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Preface Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Equipment 1
5 Sample 1
6 Test Step 3
7 Test report 6
Appendix A (informative appendix) The structural changes of this standard compared with ISO 14272.2016 7
Appendix B (informative appendix) This standard and ISO 14272.2016 technical differences and their reasons list 8
Appendix C (informative appendix) Decomposition diagram description of hydraulic clamp 9
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses the redrafting method to modify and adopt ISO 14272.2016 "Destructive Test of Resistance Welding Seam Resistance Spot Welding and Projection Welding"
The size and procedure of the cross tensile test specimen of the joint.
Compared with ISO 14272.2016, this standard has many structural adjustments. Appendix A lists this standard and ISO 14272.2016
A list of changes in the chapter number
Compared with ISO 14272.2016, there are technical differences between this standard and the clauses involved in these differences have been passed on the outer margins.
The set vertical single line (|) is marked, and Appendix B gives a list of the corresponding technical differences and their reasons.
This standard has made the following editorial changes.
---Modified the standard name;
---References are deleted.
This standard was proposed and managed by the National Welding Standardization Technical Committee (SAC/TC55).
Drafting organizations of this standard. CRRC Tangshan Locomotive and Rolling Stock Co., Ltd., Harbin Welding Research Institute Co., Ltd., and Jianghuai Yangtian Automobile in Lixin County
Co., Ltd., Chongqing University of Science and Technology, Shanghai Institute of Materials, Dongfeng Motor Group Co., Ltd. Passenger Vehicle Company, Geely Automobile Research Institute
(Ningbo) Co., Ltd., Beijing Aerospace Fresh Air Machinery Equipment Co., Ltd.
The main drafters of this standard. Hou Zhenguo, Hao Longyu, Liu Jie, Wang Gang, Li Sushan, Su Jinhua, Wang Bin, Jin Jingjing, Yin Limeng, Xu Wei, Li Jinguang,
Tian Dexi.
Cross tensile test method for resistance spot welding and projection welding joints
1 Scope
This standard specifies the equipment, specimens, test procedures and methods for the cross tensile test method of resistance spot welding and projection welding lap joints of metallic materials.
experiment report.
This standard applies to metal plates with a thickness of 0.5mm~5.0mm, a maximum solder joint diameter of 7t and less than 12mm (t is the plate thickness, when the plate thickness is
At different times, t is the thickness of the thinner plate) resistance welding joint.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 3375 welding terminology
GB/T 16825.1 Inspection of static uniaxial testing machine Part 1.Inspection and calibration of the force measuring system of tensile and (or) compression testing machines
Standard (GB/T 16825.1-2008, ISO 7500-1.2004, IDT)
3 Terms and definitions
The following terms and definitions defined in GB/T 3375 apply to this document.
3.1
Crosstension test
By applying a test force perpendicular to the bonding surface of the solder joint, the mechanical properties of the resistance welded joint sample and the tensile test of the fracture form are determined.
3.2
Crosstensionforce
The force applied to the specimen in a cross tensile test.
3.3
Solder diameter welddiameter
dw
After the destructive test, without the help of metallographic inspection, the average diameter of the melting area measured on the bonding surface.
4 Equipment
The tensile testing machine should meet the requirements of GB/T 16825.1, and the test force measurement accuracy should be within 1%.
5 Sample
5.1 Shape and size
The sample consists of two rectangular test pieces, as shown in Figure 1.If fastening bolts are used to hold the specimen, two drills should be machined on each specimen.
hole. If a hydraulic clamp is used to clamp the sample, the test piece does not need to be drilled.
The solder joint should be located in the center of the sample, and the position tolerance in any direction is ±1mm.
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