干燥盘电阻焊结构有限元分析及设计

Finite Element Analysis and Design of the Resistance Welding Structure of the Drying Plate

干燥盘为具有多焊缝、大尺寸和大变形等特点的薄壁压力容器,采用电阻焊焊接时焊点数量直接影响干燥盘的承载能力、变形情况和焊接工作量.基于ANSYS模拟软件建立电阻焊干燥盘模型,研究不同工作温度和压力下干燥盘的变形和应力分布,从而设计满足工艺要求的焊点数量.模拟结果表明,干燥盘薄弱环节一般出现在板的内孔和外沿冲窝分布不均匀处.在极限工作条件300,℃、0.4,MPa下,当焊点等效直径为17,mm,即每个冲窝内采用5个焊点焊接时,干燥盘的最大变形为0.577,mm,最大应力为174,MPa,满足工艺变形和强度要求.根据上述结构设计生产出干燥盘并进行水压试验,结果表明水压试验合格,模拟得到的干燥盘结构设计是可行的.

bThe drying plate is a thin-wall pressure vessel with multiple welds,large size and large deformation.The number of resistance welding spots directly affects its bearing capacity,deformation and welding workload.Based on ANSYS simulation software,the model of resistance welding drying plate was established to study the deformation and stress distribution under different temperatures and pressures.As a result,the number of welding spots was designed to meet the technical requirements.The simulation results show that the weak link of drying plate generally appears at the inner and outer edges of the cover plate where the punch distribution is uneven.Under the extreme working conditions of 300 ℃ and 0.4,MPa,when the equivalent spot diameter is 17,mm（5 spots in every punching hole）,the maximum deformation of drying plate is 0.577,mm and the maximum stress is 174,MPa,which can satisfy the requirements of technical deformation and strength.According to the above structure,the drying plate was designed and produced,and the water pressure test was carried out.The results show that the water pressure test is qualified and the structure design of the drying plate is feasible.