Numerical Simulation of Effect of Electrode Strips on Temperature Field of Resistance Spot Welding of Stainless Steel

WANG Wei; XU Yongshi; YANG Zhibin; XU Ye

doi:10.7512/j.issn.1001-2303.2024.12.15

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Numerical Simulation of Effect of Electrode Strips on Temperature Field of Resistance Spot Welding of Stainless Steel
Vol. 54, Issue 12, Pages: 96-100(2024)
Received：28 February 2024，

Revised：2024-09-11，

Published：25 December 2024
DOI： 10.7512/j.issn.1001-2303.2024.12.15
稿件说明：

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王薇，许永仕，杨志斌，等.电极带对不锈钢电阻点焊温度场影响的数值模拟［J］.电焊机，2024，54（12）：96-100. DOI： 10.7512/j.issn.1001-2303.2024.12.15.

WANG Wei, XU Yongshi, YANG Zhibin, et al.Numerical Simulation of Effect of Electrode Strips on Temperature Field of Resistance Spot Welding of Stainless Steel[J].Electric Welding Machine, 2024, 54(12): 96-100. DOI： 10.7512/j.issn.1001-2303.2024.12.15.

摘要

电阻点焊是一个涉及热、力、电多种物理场的复杂耦合过程，广泛应用于不锈钢车体结构的连接。通过有限元模拟软件ABAQUS研究了电极带对不锈钢电阻点焊温度场的影响。电极带式点焊通过在电极与待焊板材之间加入电极带来降低压痕，并保护电极。基于现场参数，采用三维有限元建模，分析了电极带对温度场、熔核尺寸和压痕深度的影响。结果表明，电极带能延缓点焊区域散热，有利于熔核的形成与长大；同时，电极带能有效扩大接触界面的受力面积，减小被焊板材表面的压强，从而有效降低压痕深度；在相同点焊参数下，电极带点焊形成的熔核比常规点焊略大。通过试验验证，模拟结果与试验结果基本吻合，进一步证实了电极带在电阻点焊中的积极作用。为电极带式电阻点焊工艺的制定和优化提供了理论支持。

Abstract

This paper investigates the influence of electrode stripes on the temperature field of stainless steel resistance spot welding through the finite element simulation software ABAQUS. Resistance spot welding is a complex coupling process involving thermal

mechanical

and electrical physical fields

widely used in the connection of stainless steel vehicle body structures. Electrode stripe spot welding reduces indentation and protects the electrode by adding an electrode stripe between the electrode and the workpiece to be welded. Based on field parameters

this study adopts three-dimensional finite element modeling to analyze the effects of electrode stripes on the temperature field

nugget size

and indentation depth. The results show that the electrode stripe can delay the heat dissipation in the spot welding area

which is beneficial for the formation and growth of the nugget; at the same time

the electrode stripe can effectively increase the contact area of the interface

reduce the pressure on the surface of the workpiece

and thus effectively reduce the indentation depth. Under the same spot welding parameters

the nugget formed by electrode stripe spot welding is slightly larger than that of conventional spot welding. Through experimental verification

the simulation results are basically consistent with the experimental results

further confirming the positive role of electrode stripes in resistance spot welding. This study provides theoretical support for the formulation and optimization of the electrode stripe resistance spot welding process.

关键词

Keywords

references

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