采用铰刀铰孔是精加工的一种最常用的方法,操作简单使用方便。但是,由于所铰的孔精度都较高(2～3级精度),公差数值很小,相应铰刀磨损极限也很小。为此。在实际生产中,有大量的铰刀因其磨损超差而不能继续使用,只好更换新的铰刀。报废的铰刀,利用率很低(因为通常加工的孔径下限公差大多等于0),丢弃又为之可惜。为此,我们采用了一种简易修复磨损报废铰刀的方法——刮挤法。经现场使用效果很好,成功率达100％,而且一把铰刀可做几次修复,充分发挥了铰刀作用。此外,修复的铰刀因受冷作硬化作用,耐用度有所 Reamer reaming is the most commonly used method of finishing, easy to use and easy to use. However, due to the accuracy of the hinged holes are high (2 to 3 precision), the tolerance value is small, the corresponding reamer wear limit is very small. to this end. In actual production, a large number of reamer because of its wear and tear can not continue to use, had to replace the new reamer. Scrapped reamers are poorly utilized (because the lower limit of the borehole diameter normally machined is equal to 0), it is a pity to discard it. To this end, we have adopted a simple method of repairing wear and tear reamer - scraping squeeze method. The field use of good results, the success rate of 100%, and a reamer can be done several times to repair, give full play to reamer role. In addition, the reamer hardened because of cold hardening, durability