摘要
目的研究焊接参数对焊缝成形尺寸的影响规律。方法基于冷金属过渡技术,采用正交试验方法得到在不同参数组合下焊缝熔宽、余高和第2层增高,通过多元线性回归拟合,建立了焊缝熔宽、余高和第2层增高与焊接参数之间的回归模型。结果影响焊缝熔宽和余高的主要焊接参数是焊接速度,影响焊缝第2层增高的主要焊接参数是送丝速度,而层间温度的变化对熔宽会有显著影响,但是对余高和第2层增高的影响不大,而且焊缝第2层的增高与余高在数值上存在较大的差异,对比预测值和试验值验证了回归模型的准确性。结论通过改变焊接速度可以引起熔宽和余高的显著变化,层间温度对余高和第2层增高不会造成很大影响。
The effect of welding parameters on bead forming dimension was studied by the cold metal transfer technology(CMT) in this paper. Bead width, height and second layer height under different parameter combinations was obtained by the orthogonal experiments, and the regression model of bead width, height, second layer height and welding parameters was established by the multiple linear regressions. As a result,welding speed is a main welding parameter which influence bead width and height, and wire feeding speed is a main welding parameter that affect bead second layer height.The change of interlayer temperature has a significant effect on bead width, but it has little effect on the increase of bead height and second layer height, and the increase of bead height and second layer height have great difference in numerical value. The accuracy of the model is verified by comparing the predicted values and the experimental values.In conclusion,by changing welding speed can cause significant changes in bead width and height, and second layer height will not be greatly affected by changing interlayer temperature.
出处
《精密成形工程》
2016年第6期21-25,共5页
Journal of Netshape Forming Engineering
基金
国家自然科学基金(5130501)
关键词
冷金属过渡
焊缝成形尺寸
正交试验
多元线性回归
cold metal transfer
bead forming dimension
orthogonal experiments
multiple linear regressions
