Linear analysis among minimum nugget diameter and minimum shear strength and plate thickness in resistance spot welding

ZHANG Wenyang; GUO Shaoqing; LIANG Hai; LI Neng; SUN Bingbing

doi:10.7512/j.issn.1001-2303.2021.11.01

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Linear analysis among minimum nugget diameter and minimum shear strength and plate thickness in resistance spot welding
Vol. 51, Issue 11, Pages: 1-7(2021)
Published：2021
DOI： 10.7512/j.issn.1001-2303.2021.11.01
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DOI：

ZHANG Wenyang, GUO Shaoqing, LIANG Hai, et al. Linear analysis among minimum nugget diameter and minimum shear strength and plate thickness in resistance spot welding[J]. Eletric Welding Machine2021, 51(11): 1-7. DOI： 10.7512/j.issn.1001-2303.2021.11.01.

摘要

以现行的电阻点焊航空工业标准、国家标准、国家军用标准以及国际标准为基础

总结了铝合金、钛合金、钢及高温合金等合金电阻点焊工艺中

最小熔核直径及最小剪切强度与板材厚度的关系

结论显示:对于各种合金在各种热处理状态下的电阻点焊

板厚在1.2～1.5 mm范围内存在分界点

在该分界点以左及以右

最小熔核直径及最小剪切强度与板厚均大致呈线性关系(对于极限强度在1 035～1 275 MPa和大于1 275 MPa的高温合金材料

在板厚2.5 mm以右

还需要再细分一段)

同时提出了以强度对材料进行系统分类的原则。该结论可以对各种板厚新材料以及标准中未涉及到的板厚的电阻点焊的最小熔核直径及最小剪切强度提出理论预测。

Abstract

Based on the current aviation industry standard

national standard

national military standard and international standard of resistance spot welding

the relationship between minimum nugget diameter

minimum shear strength and plate thickness in resistance spot welding of aluminum alloy

titanium alloy

steel and super alloy is summarized. The conclusion shows that for resistance spot welding of various alloys under various heat treatment conditions

there is a boundary point in the thickness range of 1.2 ～ 1.5 mm. At the left and right of the boundary point

the minimum nugget diameter and minimum shear strength are approximately linear with the plate thickness（for ultimate strength in 1 035 ～ 1 275 MPa and more than 1 275 MPa of high temperature alloy material

the thickness of 2.5 mm to the right

need to be subdivided）

at the same time

strength of materials is put forward as the principle of classification system. This conclusion can be used to predict the minimum nugget diameter and the minimum shear strength of resistance spot welding of various plate thickness of new materials and those not covered in the standard.