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复合钢架的焊接变形,对我厂来说是个老问题。过去,曾采取不少措施,如用小电流、选用小直径电焊条、间断焊接、二人对称焊接等,但最后的焊接变形仍然超过设计要求,不得不用乙炔焰进行校正。为什么复合钢架焊接后会变形?主要是焊接过程对焊件进行了局部的不均匀加热,产生焊接应力而引起变形。焊件的变形是内部矛盾转化造成的,因而也只能在正视它的
Composite steel frame welding deformation, the plant is an old problem. In the past, many measures were taken such as using small current, using small diameter welding electrodes, intermittent welding and two-person symmetrical welding. However, the final welding deformation still exceeded design requirements and had to be calibrated with acetylene flame. Why composite steel frame will be deformed after welding? Mainly the welding process of the welding parts were uneven heating, resulting in welding stress caused by deformation. The deformation of the weldment is caused by the internal contradictions, so it can only face it