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铛头的结构可分为刀架部分和拨动部分(如附图)。刀架部分用环首螺栓和连杆固定在长铛杆上,由键传动。刀架半壳1上装有丝杆,由蜗杆3经蜗轮2传动。方刀架5下面装着螺母4,随着蜗杆的转动,方刀架就可以在刀架半壳上的燕尾导轨上向外或向内移动,达到径向走刀的目的。蜗杆轴的一端装着刻度盘7和链轮8,丝杆螺距6毫米,蜗轮20齿,蜗杆双头,链轮6个齿,所以链轮每拨过一个齿,刀架的进刀量为:
The structure of the clang head can be divided into turret parts and toggle part (such as photos). Turret part of the ring with the first bolt and connecting rod fixed on the long rod, driven by the key. Half-shell turret 1 is equipped with a screw rod, worm 3 by the worm gear 2 transmission. The square knife holder 5 is equipped with a nut 4 below, with the rotation of the worm, the square knife holder can move outwardly or inwardly on the dovetail guide rail on the half shell of the knife holder to achieve the purpose of radial cutting. One end of the worm shaft is equipped with a dial 7 and a sprocket 8, the lead screw pitch is 6 mm, the worm gear 20 teeth, the worm double head and the sprocket are six teeth. Therefore, when the sprocket dials one tooth,