P265GH钢管道全位置自动氩弧焊对接接头打底成形预测

Prediction of backing forming of butt joint of the P265GH steelpipe by all position automatic argon arc welding

为了探究管道全位置焊接中焊接工艺参数对焊缝成型的影响,该研究使用苏州热工研究院研制的管钳式管道全位置脉冲氩弧焊机对P265GH低碳钢管对接接头进行打底焊接.基于响应曲面法,针对焊接峰值电流、焊接速度、送丝速度和焊接位置4个重要焊接工艺因素,使用焊缝熔宽、熔深和焊缝厚度作为响应值对焊接工艺参数优化,分析了单一因素和交互因素对焊缝成形尺寸参数的影响规律.研究结果表明:在管道全位置焊接中,增大峰值电流可以增大焊缝熔深和焊缝厚度;焊接速度的增加会造成焊缝熔宽、熔深和厚度的减小;送丝速度增加会导致焊缝熔深和厚度增加;焊接角度的增大会造成焊缝熔宽、熔深以及焊缝厚度增加.

In order to explore the influence of welding process parameters on weld forming in pipeline full-position welding,the pipe clamp pipe all position pulse argon arc welding machine developed by Suzhou Thermal Power Research Institute was applied to backing weld the butt joint of the P265GH low carbon steel pipe.Based on the response surface method,in view of the four important welding process factors of welding peak current,welding speed,wire feeding speed and welding position,the welding process parameters are predicted by using weld width,penetration depth and weld thickness as response values,and the influence of single factors and interactive factors on the dimensional parameters of weld forming is analyzed.The research results show that in all-position welding of pipelines,increasing the peak current can increase the weld penetration and thickness;the increase in welding speed will cause the reduction of the weld width,penetration and thickness;The wire feed speed has little effect on the weld penetration width,and increasing the wire feed speed will lead to an increase in the weld penetration depth and thickness;The increase in welding angle will cause the welding width,penetration depth and welding thickness to increase.