凸模刃口端部修出斜面或弧形。这是减缓冲裁力的有效方法。减缓冲裁力，即可减轻对凹模侧材料的拉伸力，fastener分类，从而达到**冲压件产生翻料、扭曲的效果。
The end of the punch is repaired with a bevel or arc. This an effective way to slow down the blanking force. By reducing the force of buffer， the tensile force of the side material of the die can be reduced， so that the stamping and twisting effect can be suppressed.
深缝：锯削深缝时即当锯缝的深度超过锯弓高度时，高度时，锯弓就会与工具相碰，无法继续锯削；此时应将锯条拆出，将锯条转90。
Deep seam: when sawing deep seams， when the depth of the sawblade exceeds the height of the saw bow， when the height is high， the saw bow is touched by the tool and can not continue to be sawed; the saw strip should be removed and the saw blade is turned 90.
手锯加工方法
扁钢的锯削：在扁钢锯口处划一周圈线，分别从宽面的两端锯下，fastener种类，两锯缝将要结接时，轻轻敲击使之断裂分离。这样锯削，白城fastener，而且能较好地防止锯齿崩缺。反之若从窄面下锯，fastener价格，非但不经济，而且只有很少的锯齿与工件接触，工件越薄，锯齿越容易被工件的棱边钩住而折断。
Processing method of hand saw
Sawing of flat steel: a circular line at the cutting edge of flat steel， which is cut down from the two sides of the wide surface. When the two saws will be tied， it will be gently tapped and broken apart. The sawing efficiency is high， and the sawtooth collapse is prevented. On the ， if it is sawed under the narrow face， it is not economical， and only a few teeth are touched with the workpiece. The thinner the workpiece is， the more easily the sawtooth is caught and broken by the edges and edges of the workpiece.
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