等离子电弧加热弯曲成形还可以降低机械加工引起的残余应力，有效减少回弹。

The plasma arc forming can also decrease the residual stresses caused in the mechanical processes, which can be of great significance in preventing rebounding.

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然而，对于由机械加工获得的金属机械零件，必须考虑零件内存在的残余应力对热变形误差的影响。

However, for the metal mechanical parts which are processed by mechanical method, the influence of its inner residual stress on the thermal deformation error should be considered.

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