电焊机2017，Vol.47Issue(5)：27-31,5.DOI:10.7512/j.issn.1001-2303.2017.05.06
对流换热系数对熨平板焊接变形和应力的影响
Influence of convective heat transfer coefficient on welding deformation and stress of screed
张华清 1房元斌 2王伟伟3
作者信息
- 1. 徐工集团道路机械分公司,江苏徐州221004
- 2. 江苏徐州工程机械研究院,江苏徐州221004
- 3. 徐州徐工液压件有限公司,江苏徐州221004
- 折叠
摘要
Abstract
The finite element is used to simulate postwelding deformation and stress distribution of screed with different convection heat transfer coefficients.And the results are verified by using feeler gauges and x ray metho& The results show that overall deformation trend is bubble shape of U-shaped plate,and the extended end of the left connecting plate shrinks and deforms along the forward direction of x axis.And the free edges of two side panels are concave.The maximum deformation position appears on the tip of the connecting plate extended end.When the convective heat transfer coefficient loads temperature change curve,the deformation error is 34.3％.When the coefficient is 0.02,the error is 17.1％.Different coefficients have little effect on the peak values of the residual stress.The trend of stress distribution is consistent with that when the convective heat transfer coefficient of 0.02 and the error is 32.6％.Using curve loading and without considering low stress zones,error is 21.1％.All of them meet the requirements of engineering application,which proves that accuracy of the simulation results.Two loading modes can predict welding deformation.Under the circumstance of many welds and complicated stress distribution,the curve loading method is recommend,otherwise the loading method with coefficient of 0.02 are recommend.关键词
散热系数/有限元/焊接变形/应力Key words
convective heat transfer coefficient/finite element/welding deformation/stress分类
矿业与冶金引用本文复制引用
张华清,房元斌,王伟伟..对流换热系数对熨平板焊接变形和应力的影响[J].电焊机,2017,47(5):27-31,5.
