中国机械工程 ›› 2010, Vol. 21 ›› Issue (8): 999-1002.

• 材料工程 • 上一篇    下一篇

残余最大主应力与振动焊接参数的相关性分析

卢庆华1;陈立功2;倪纯珍2;于治水1
  

  1. 1.上海工程技术大学,上海,201620
    2.上海交通大学,上海,200240
  • 出版日期:2010-04-25 发布日期:2010-05-05
  • 基金资助:
    上海高校选拔培养优秀青年教师科研专项基金资助项目(gjd08015);上海市重点学科建设资助项目(J51402);上海工程技术大学科研项目(校启08-27)

Correlation Analysis of Residual Maximum Main Stress and Vibratory Welding Parameters

Lu Qinghua1;Chen Ligong2;Ni Chunzhen2;Yu Zhishui1
  

  1. 1.Shanghai University of Engineering Science,Shanghai,201620
    2.Shanghai Jiao Tong University,Shanghai,200240
  • Online:2010-04-25 Published:2010-05-05

摘要:

采用试验分析、数理统计的方法研究不同参数下的振动埋弧焊残余最大主应力(σmax)。结果表明:在较小焊接热输入(22.8kJ/cm)下,σmax随着振动加速度的增大而减小,且趋势明显;在中等焊接热输入(26.6kJ/cm)下,σmax在10m/s2的振动加速度下残余应力最小;而对于较大焊接热输入(31.6kJ/cm),σmax也较大,只有振动加速度达到15m/s2时σmax才有明显下降。建立了焊接热输入、振动加速度与残余最大主应力的相关性关系曲线,确定了以降低残余应力为主要目标的最佳工艺参数,认为焊接热输入在22.8~32kJ/cm范围时,振动加速度选取在10~15m/s2范围内,可获得较低的残余最大主应力。

 

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Abstract:

The residual maximum main stress (σmax) of vibratory submerged-arc welding (SAW) under different parameters was studied by means of experiments and mathematical modeling.The results show that when the welding heat input is 22.8kJ/cm,σmax will be reduced evidently as the acceleration increases.The lowest σmax is obtained when the welding heat input is 26kJ/cm and acceleration 10m/s2.While heat input increases to 31.6kJ/cm,σmax distinctivly decreases under the acceleration of 15m/s2.
The correlation curve of σmax related to heat input residual and acceleration was got through multi-variant nonlinear regression analysis.The optimal vibratory welding parameters were established. Heat input ranged from 22.8~32kJ/cm with acceleration from 10~15m/s2 favors σmax reduction.

Key words: vibratory welding, heat input, residual maximum main stress, regression analysis

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