圆振动筛箱体的焊接变形与残余应力分析  

Analysis of Welding Deformation and Residual Stress of Circular Vibrating Screen Box

作　　者：邵堃[1] 孔国利 SHAO Kun;KONG Guoli(Department of Electrical and Mechanical Engineering,He＇nan Polytechnic,Zhangzhou 450046,China;School of Information Engineering,Zhengzhou Institute of Technology,Zhengzhou 450000,China)

机构地区：[1]河南职业技术学院机电工程系,河南郑州450046 [2]郑州工程技术学院信息工程学院,河南郑州450000

出　　处：《热加工工艺》2018年第17期180-183,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(60974005);国家十二五科技支撑计划项目(2014BAH09F00)

摘　　要：为了评估圆振动筛箱体的焊接强度,首先分析了四层圆振动筛的结构和焊接工艺,然后使用ANSYS软件,采用双椭球热源模型和热机耦合分析法对筛箱焊接过程进行数值模拟,最后计算出筛箱焊接后的变形量及残余应力分布。仿真结果表明：圆振动筛箱在焊接过程中宽度方向变形最严重,最大变形量为1.58 mm,沿焊缝方向纵向残余拉应力的最大值为210 MPa,等效残余应力最大值为195 MPa,筛箱焊接后质心位置变化和残余应力均满足焊接要求。In order to evaluate welding strength of the circular vibrating screen box, the structure and welding process of the four-layer circular vibrating screen were analyzed firstly. Then, the ANSYS software was used to simulate welding process of the screen box with adoption of the double ellipsoid heat source model and thermomechanical coupling method. Finally, the deformation and residual stress distribution of the screen box after welding were figured out. The simulation results show that the circular vibrating screen box has the most serious deformation in the width direction during welding, and the maximum deformation is 1.58 mm. The maximum value of the longitudinal residual tensile stress along the welding direction is 210 MPa, and the maximum value of the equivalent residual stress is 195 MPa. The change of the centroid position and residual stress after welding meet the welding requirements.

关 键 词：振动筛箱体 数值模拟 焊接变形 残余应力 温度场 

分 类 号：TG404[金属学及工艺—焊接]