The rear impact roller stretches the weld longitudinally with transverse compressive plastic deformation of the weld, thus reducing the residual deformation and stresses in the bead.
后轮将焊缝金属的纵、横向压缩塑性变形充分碾展，减小了工件的残余变形和应力。
The rear impact roller stretches the weld longitudinally with transverse compressive plastic deformation of the weld, thus reducing the residual deformation and stresses in the bead.
后轮将焊缝金属的纵、横向压缩塑性变形充分碾展，减小了工件的残余变形和应力。
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