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机械装配、修理在攻丝或铰孔中,比较麻烦的是深孔、台阶孔、死角孔的加工,为了解决这类孔的加工向题一般都采取连接套接长丝锥、铰刀柄的方法。而常用的连接套,前端多为四方形盲孔。这种连接套不但难于加工制作,而且它的四方形盲孔导向长度短,又是松动配合,定位稳定性较差,攻丝、铰孔后有些是歪斜的,很不理想,稍不小心还会使丝锥、铰刀折断。另外丝锥、铰刀与连接套没有紧固装置,攻丝、铰孔后,丝锥,铰刀容易掉在台阶孔里,给工作带来麻烦。
Mechanical assembly and repair in the tapping or reaming, the more troublesome is the deep hole, step holes, dead ends hole processing, in order to solve the problem of processing such holes to the general take the method of connecting long tap, reamer shank . The commonly used connection sets, front-end mostly square square blind hole. This connection sleeve is not only difficult to manufacture, and its four square blind hole guide length is short, but also loose fit, poor positioning stability, tapping, reaming some skewed, very unsatisfactory, a little careless also Will make the tap, reamer broken. In addition taps, reamers and connecting sleeve without fastening device, tapping, reaming, tap, reamer easily fall in the step hole, to work in trouble.