车床上钻中心孔,通常用钻夹头夹固,这种方法对加工批量较大的细长轴并不适宜,工件夹入太多,装夹不方便,钻一根就得松一次尾架;工件夹入少了,容易引起失调而折断钻头. 在生产实践中,我们试制了一种简易钻削夹具(如图).制作时,取适当方钢一段,装于刀架上,车头三爪卡盘上夹上钻头,直接在方钢上钻出所需要的内孔,这样可保证夹具孔中心线与车床主轴中心线同高.钻后再开槽. 使用时,先将夹具靠死、紧固在刀架 Lathe drilling center hole, usually chuck chuck, this method is not suitable for processing large volume of the elongated shaft, the workpiece is caught too much, the folder is not convenient, you have to drill a loose tailstock ; In the production practice, we trial a simple drilling fixture (pictured) .When making, take a section of the appropriate square steel, mounted on the turret, the front of the three Claw chuck clip on the drill bit, directly drilled in the square steel on the required inner hole, so you can ensure that the fixture hole centerline and lathe spindle centerline with the same high. Drill and then slotted. Use, the first fixture by death, Tighten the knife holder