基于MATLAB曲线拟合的圆柱电池焊接径向跳动分析  

Radial Runout Analysis of Cylindrical Cell Welding Based on MATLAB Curve Fitting

作　　者：庄曙东[1] 钟汉昌 ZHUANG Shudong;ZHONG Hanchang(College of Mechanical and Electrical Engineering,Hohai University,Changzhou 213000,China)

机构地区：[1]河海大学机电工程学院,江苏常州213000

出　　处：《机械》2024年第11期8-15,共8页Machinery

基　　金：江苏省高校实验室研究会立项资助研究课题(GS2019YB18)。

摘　　要：圆柱电池外壳属于轻质薄壁圆管,其与端盖焊接时,需要保持径向跳动小于0.05 mm,否则会影响焊接质量,本研究通过在原有夹具的基础上设计辅助定位结构的方法,防止圆柱外壳在焊接装夹时发生竖直方向的微小偏移,从而减小跳动误差。在理论上建立了简支梁模型,分析辅助定位结构作用在不同位置的弯曲变形情况,然后运用ANSYS Workbench软件进行了有限元分析,结果显示,在圆柱电池外壳150 mm处取得最佳下压位置,与理论计算中相符合。最后进行了径向跳动实验分析,实验结果表明,在没有下压力时,径向跳动测量值为0.0792mm(修正值),在150mm处施加下压力后,径向跳动低了127.6%,为0.0348 mm(修正值),小于0.05 mm,符合设计要求。综上所述,辅助定位结构的设计可以有效降低圆柱电池外壳与端盖焊接时的径向跳动,提高焊接质量。The cylindrical battery shell is a lightweight thin-walled round tube.When it is welded with the end cover,it is necessary to keep the radial runout less than 0.05 mm,otherwise the welding quality will be affected.In this study,the auxiliary positioning structure is designed on the basis of the original fixture to prevent the minor vertical deviation of the cylindrical shell during welding and clamping,so as to reduce the runout error.The simply-supported beam model was theoretically established,and then the bending deformation of the auxiliary positioning structure acting at different positions was analyzed.Finiteelement analysis was carried out by using ANSYS Workbench software.The results showed that the optimal downward pressure position was obtained at 150 mm of the cylindrical battery shell,which was consistent with the theoretical calculation.Finally,the radial runout experiment was analyzed.The experimental results showed that the radial runout measurement value was 0.0792 mm(corrected value)when there was no downforce,and after applying downforce at 150 mm,the radial runout was reduced by 127.6%to 0.0348 mm(corrected value).It was less than 0.05mm and met the design requirements.In summary,the design of the auxiliary positioning structure can effectively reduce the radial runout of the cylindrical battery shell and the end cover during welding,which can effectively improve the welding quality.

关 键 词：圆柱电池 径向跳动 曲线拟合 有限元 

分 类 号：TH122[机械工程—机械设计及理论]