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在电器、仪表等行业中,有大量的冲压零件,由于冲压加工的特点,影响冲压件精度的因素与其它加工方法有所区别,因此如何经济合理地决定冲压件一般公差,与提高机电产品生产的经济效果有着密切的关系。由于简单地从国家标准公差与配合中选择某种精度作为冲压件的一般尺寸公差已不能满足实际生产的需要,为此上海市机电一局制订了冲压件的工艺
In electrical appliances, instruments and other industries, a large number of stamping parts, stamping because of the characteristics of stamping parts affect the accuracy of the factors and other processing methods are different, so how to determine the economic and reasonable stamping parts of the general tolerance, and improve the production of mechanical and electrical products The economic effect is closely related. Because simply from the national standard tolerances and with the choice of a certain accuracy as the general size of the stamping parts of the tolerance can not meet the actual production needs, for this Shanghai Mechanical and Electrical Council developed a stamping process