SPCC冷轧钢胶接点焊的力学性能分析及数值模拟

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英文篇名：Analysis of mechanical properties and numerical simulation of spot weld bonding for SPCC cold rolled steel 作者：翟停停 ; 曾凯 ; 邢保英 ; 吴万平 ; 易金权 英文作者：ZHAI Tingting;ZENG Kai;XING Baoying;WU Wanping;YI Jinquan;Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology; 关键词：胶接点焊 ; 正交试验 ; 失效载荷 ; 数值模拟 英文关键词：spot weld bonding;;orthogonal experiment;;failure load;;numerical simulation 中文刊名：BCKG 英文刊名：Ordnance Material Science and Engineering 机构：昆明理工大学机电工程学院; 出版日期：2019-03-17 07:01 出版单位：兵器材料科学与工程 年：2019 期：v.42;No.295 基金：国家自然科学基金(51565022) 语种：中文; 页：BCKG201904010 页数：5 CN：04 ISSN：33-1331/TJ 分类号：38-42

摘要

针对1.5 mm厚的SPCC冷轧钢薄板,以焊接时间、焊接电流和电极压力为变量进行胶接点焊和点焊正交试验,开展拉剪试验获得两种接头的失效载荷;建立点焊和胶接点焊仿真模型,分析熔核过程温度场的演变特征。结果表明:胶焊和点焊接头的最大平均失效载荷分别为11 071、10 180 N;胶层的存在增大胶焊过程中熔核区电阻热的输入,胶焊接头高温熔核区的维持时间较点焊熔核区维持时间更长;在搭接区内存在未发生气化的胶层,对热量向外扩散造成阻碍,导致搭接边缘产生较大的翘曲。
        The orthogonal experiments of spot welding and spot weld bonding were designed for 1.5 mm thick SPCC cold rolled steel,the variables including the welding time,welding current and electrode force. The tensile-shear tests were carried out to obtain the tensile strength of two welding joints. In order to analyze temperature field characteristics in the fusion process and the simulation models of spot welding and spot weld bonding were established. The results show that the maximum average failure loads of spot weld bonding and spot welding joints are 11 071 N and 10 180 N respectively. The thermal heat of the weld bonding nugget increases due to the existence of adhesive,the high temperature of weld-bonding nugget stays longer than that of spot welding nugget. While the ungasified adhesive of weld bonding lap zone obstructs heat transformation which lead to a relatively large warpage appears at the overlapping edge.

引文

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