拘束焊对接接头的平面外拘束力

Out-of-plane Restraint of Butt Joint Under Restraint Welding

关键词:  对接接头  角变形  拘束焊  弹塑性弯曲理论

Key words:  butt joint  angle deformation  restraint welding  elasto-plastic bend theory

摘要:

合理采用拘束焊和反变形工艺措施,能有效地消除焊接残余变形,但是由于焊接结构应力应变场的复杂性,使得精确地计算拘束力、拘束长度和反变形很困难。本文应用弹塑性弯曲理论提出了一种消除焊接对接接头角变形的平面外拘束力的计算方法,计算了极限拘束力、拘束长度和反变形的量值,并通过试验验证了方法的有效性。

Abstract:

It can remove residual welding deformation effectively to use technology of restraint welding and reverse deformation. But, it is very difficult to calculate values of restraint, restraint length and reverse deformation accurately, because of the complication of stress and strain fields in welded structure. By the theory of elasto-plastic bend, this paper prowents a method to calculate out-of-plane restraint and reverse deformation that are made use of to remove angle deformation in butt joints. The values of limit restraint, restraint length and reverse deformation have been calculated. The results of test show that the calculation method is effective.