焊接接头拘束夹具焊接过程中的加热及冷却在工件上所产生的热应力,往往是造成焊接接头区的变形及残余应力的根源。而焊接接头的性能变坏也常常是由于变形及残余应力所造成的。在焊接时,如只对上述一方加以控制,则另一方的倾向就会更加严重。因此,就一般采用控制变形的拘束而言,当工件为薄板时,如对变形与残余应力的影响加以比较,则更应重视变形,故往往采用在工件四周牢固拘束的措施。当工件为厚板时,则不可忽视残余应力的影响。因而,应采取使接 Welding joint restraint fixture heating and cooling during welding process in the workpiece generated by the thermal stress is often the cause of the deformation of welded joints and the root cause of residual stress. The deterioration of welded joints performance is often due to deformation and residual stress caused. During welding, if only one of the above parties is controlled, the tendency of the other party will be more serious. Therefore, the general control deformation constraints, when the workpiece is thin, such as the impact of deformation and residual stress to be compared, you should pay more attention to deformation, it is often used in the workplace around the rigid restraint measures. When the workpiece is thick, you can not ignore the impact of residual stress. Therefore, it should be taken to make