机械工程材料
MATERIALS FOR MECHANICAL ENGINEERING DOl: 10.11973/jxgccl201711016
2017年11月第41卷第11期Vol.41No.11Nov,2017
压路机压轮焊接变形和残余应力的有限元模拟
房元斌2，王勇”，王灿"2，陆永能"，
（1.徐工集团江苏徐州工程机械研究院，徐州221004；
2.徐工集团工程机械有限公司，高端工程机械智能制造国家重点实验室，徐州221004：
3.徐州徐工矿山机械有限公司，徐州221004）
摘要：基于热弹塑性理论，借助有限元分析方法，建立了压路机压轮的有限元模型，模拟了压轮焊后的变形和残余应力分布；采用盲孔法测试了压轮的残余应力，并与模拟结果进行了对比。结果表明：两封口板发生焊后变形呈外凸状，最大变形量为5.732mm；压轮焊后起收弧位置和焊缝位置的残余应力大，应力峰值为416.40MPa；随着距卷圆板自由边距离的增大，卷圆板直焊缝中心位置的残余应力先增大后减小再增大，残余应力测试值与模拟值较吻合，证明了模拟结果的准确性。
关键调：压路机压轮；残余应力；有限元法；盲孔法
中图分类号：TG404
文献标志码：A
文章编号：1000-3738(2017)11-0082-04
FiniteElementSimulationforWeldingDeformationandResidual Stress
inPressureWheel of RoadRoller
FANGYuanbin',WANGYong,WANGCanl·,LUYongnengl-2
(1.XCMG Jiangsu Xuzhou Engineering Machinery Research Institute, Xuzhou 221004,China;
2,State key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, XCMG Construction Machinery Co., Ltd., Xuzhou 221004, China;3. XCMG Xuzhou Mining Machinery Co., Ltd., Xuzhou 221004, China)
Abstract : On the basis of thermo elastic plastic theory and finite element analysis method, the finite element model of the press wheel was established and the welding deformation and residual stress distributions of the pressure wheel were simulated. The residual stresses of the pressure wheel were measured by a blind-hole method and compared with those by simulation, The results show that two sealing plates had a convex shape due to the
welding deformation, The maximum deformatio
5. 732 mm. The residual stresses at the welding arc
and weld seam of the pressure wheel after welding were relatively large, The peak value of stresses was 416.40 MPa. With increasing distance from the free edge of circular plate
te, the residual stress at the straight weld center of the
circular plate first increased then decreased and then
ased, The measured residual stresses coincided well with
those from the simulation, indicating the accuracy of the simulation.
Key words: pressure wheel of road roller; residual stress; finite element method; blind-hole method
引言 0
压路机压轮的外径为1400mm，轮宽为 2100mm,轮边与内封板距离为500mm，板厚为 40mm，材料为Q460D钢。外圆钢板经卷圆工艺后采用对接焊连接，卷圆板与两侧封口板采用圆周焊
收稿日期：2016-11-10；修订日期：2017-08-26
基金项目：国家科技支撑计划项目（2015BAF07B02）
作者简介：房元斌(1985一），男，山东威海人，工程师，硕士 82
万方数据
连接，两焊缝的热影响区出现交叉作用，残余应力分布复杂，很难预测。同时，在工作中对压轮施加振动时，残余应力会不断释放，使压轮发生变形，影响压实效果。因此，有效预测并控制压轮在焊接后的变形和残余应力分布至关重要1-}。
随着焊接数值模拟技术不断成熟，大型结构件的变形和残余应力预测成为可能。在提高预测的效率和精度方面，研究人员进行了大量的研究3。 MOCHIZUKI等[4基于固有应变法快速预测了大型结构件的焊接变形；黎志鹏等5)采用相似理论对