On the basis of calcuiation and experience, through side-bending test, test piece's extensibility is relative small, and its weld surface after processed is unaffected by the piece's surface quality.
根据计算和经验，侧弯伸长率小，且焊缝表面经过加工，不受表面质量影响，所以试验结果更接近实际，更为准确。
Least one of the experience on drill machine surface grinding machine, bending machine or a mechanic.
至少具有钻床，磨床，折弯机或机械中一项以上经验。
Basing on years experience, the author generates bouncing scrap, oscillation, bending rebound and correcting method.
根据多年工作经验总结了跳屑、偏摆、弯曲回弹等冲压中常见问题及解决方法。
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