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要提高精密深孔的加工质量和单刃刀具(单刃钻头、镗刀头、单刃铰刀等)的使用寿命,在很大程度上取决于在滑动摩擦条件下工作的导向块使用寿命的提高。改进导向块结构和夹固方法是解决这一问题的途径之一。目前许多单刃刀具均采用键形硬质合金导向块,用钎焊或机夹法紧固在刀槽内,紧固后导向块在磨外圆、前、后切削锥和沿工作部份的圆周倒
To improve the processing quality of precision deep holes and the service life of single-edged tools (single-edged drill bits, boring heads, single-edged reamers, etc.) depend to a large extent on the service life of the guide blocks working under sliding friction improve. One of the ways to solve this problem is to improve the structure of the guide block and the clamping method. At present, many single-blade knives use key-shaped cemented carbide guide blocks, which are fastened in the sipes by brazing or clip-on methods. After fastening, the guide blocks are worn on the outer circumference, front and rear cutting cones, Circle down