我车间在加工螺丝攻扳手上的方孔及其他方孔时,改进了方孔插刀(如附图),它的结构和优点如下: 1)插刀的四面都有12°的后角,因此可以保证插出方孔的清角(即90°),不需钳工再加工。 2)插刀前后有二对称且互相平行的刀刃,因此加工完一边以后,只要移动插床横走刀工作台,把工件移 I workshop in the processing screwdriver square hole and other square hole, improved square hole knife (as the figure), its structure and advantages are as follows: 1) the knife on both sides have a 12 ° relief angle, Therefore, it can be ensured that the square hole (ie, 90 °) that is inserted into the square hole does not need to be re-machined by a fitter. 2) before and after the knife has two symmetrical and parallel to each other’s cutting edge, so after finishing the side, just move the slot machine horizontal knife away from the table, the workpiece shift