颚式破碎机机架焊接残余应力有限元分析  

Simulation of Jaw Crusher's Welding Residual Stress by FEM

作　　者：雷奇[1] 秦志钰[1] 容幸福[1] 张希洋 

机构地区：[1]太原理工大学机械工程学院,山西太原030024

出　　处：《热加工工艺》2015年第1期193-195,198,共4页Hot Working Technology

基　　金：山西省留学办山西省留学归国人才科研项目(2010-40)

摘　　要：运用大型有限元分析软件ABAQUS,对实验用小型颚式破碎机的机架进行焊接残余应力数值模拟分析。采用轴对称模型,选择双椭球热源,考虑材料热物理性能与温度的非线性关系,运用生死单元法模拟多道焊的焊接过程,探讨了预热和焊后热处理对焊接残余应力的影响。分析表明,对破碎机机架进行预热后,残余应力减小了14.66%,经过焊后热处理,残余应力减小了45.11%。The residual stress of small jaw crusher used in laboratory was studied by FEA software ABAQUS. The double-ellipsoidal heat source and the temperature depended material properties were used in the axisymmetric model. The model change ability was used to simulate the multi-pass welding. The influence of preheat and post weld heat treatment on the residual stress was discussed. The results show that preheat and post weld heat treatment can reduce the welding residual stress by 14.66% and 45.11%, respectively.

关 键 词：多层多道焊 有限元 预热 焊后热处理 

分 类 号：TG404[金属学及工艺—焊接]