最近我厂加工一批蜗杆,头数 Z=3,螺旋角 W=15°15′18″,轴向模数 m_(?)=4,光洁度要求▽7,右旋。开始时,用一把普通蜗杆车刀加工,牙形角不准确,同时光洁度也较低。因为螺旋角大,所以切削阻力也大。后来车工师傅采用大螺旋角蜗杆车刀(见图),为保证牙形角不变,又要使车刀锋利和耐用,车刀采用单侧刃,在背走刀方向,磨有20°左右的前角,可减小切屑变形和降低切削力,在顺走刀方向,因 Recently I process a group of worm, the first number Z = 3, the helix angle W = 15 ° 15’18 ", the axial modulus m _ (?) = 4, finish requirements ▽ 7, Ordinary worm turning process, tooth angle is not accurate, but also lower finish. Because of the large helix angle, so the cutting resistance is also large. Later chef using a large helix angle worm turning tool (see photo), in order to ensure that the tooth angle is not Change, but also to make sharp and durable turning tools, lathes with single-edged blade, back in the direction of the knife, the grinding angle of about 20 °, can reduce the chip deformation and reduce cutting force,