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增设强压功能。即对卸料镶块压料部加厚尺寸(正常的卸料镶块厚H 0.03mm)，以增加对凹模侧材料的压力，从而***冲切时冲压件产生翻料、扭曲变形。

Additional pressure function. In order to increase the pressure on the material of the die side, the pressure of the material in the die side is increased by the thickness of the material of the unloaded insert (normal unloaded insert thickness H 0.03mm), so as to suppress the turning and distortion of the stamping parts.

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，两锯缝将要结接时，轻轻敲击使之断裂分离。这样锯削，而且能较好地防止锯齿崩缺。反之若从窄面下锯，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.

槽钢的锯削：槽钢的锯削与扁钢一样，但是要分二次从宽边面往下锯，不能在一个面上往下锯，应尽量做到在长的锯缝口上起锯，因此工件必须多次改变夹持的位置。

Channel steel sawing: the channel sawing of the channel steel is the same as that of the flat steel, but it must be sawed down two times from the wide side, and can not be sawed down on one surface, and should be sawed on the long saw mouth as far as so the of the clamping must be changed many times.

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.