一、前言钻夹头是我厂生产的一种机床附件,虽然外形尺寸不大,但零件加工工序不少,过程繁杂。随着社会主义革命与社会主义建设事业的发展,需要量急剧增加,产生供不应求现象。特别是钻夹头钥匙是“附件的附件”,往往就是因为它的生产供应不上,使得整箱已经装配好的钻夹头, First, the preface Drilling chuck is a kind of machine tool accessory produced by our factory. Although the overall dimensions are not large, there are many parts processing steps and the process is complicated. With the development of the socialist revolution and the cause of building socialism, the demand has risen sharply, resulting in a phenomenon of short supply. In particular the drill chuck key is “attachment of the attachment,” often because it is not on the supply of production, making the whole box has been assembled drill chuck,