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。
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.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2010年第8期999-1002,共4页
China Mechanical Engineering
基金
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)
关键词
振动焊接
热输入
残余最大主应力
回归分析
vibratory welding
heat input
residual maximum main stress
regression analysis
