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。

By the theory of elastoplastic 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.

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