此径向可调镗头的特点是:在镗杆本体内装设一个油压驱动的活塞,依靠活塞的移动,使刀具产生微量位移,从而实现精密的进给。如图所示,可旋转的镗杆本体安装在支承部件内的轴承上,并通过轴肩使之轴向定位。安装在该轴承上的支承杆相对于镗杆本体有一个偏心 e。在镗杆的头部上各装有一把粗镗刀和精镗刀。粗镗刀直接固定在镗杆上,而精镗刀则装在有弹性的刀具支架上。支承杆的外圆为一小齿轮,在支承部件中装有与小齿轮相啮合并能自由移动的齿条。通过该齿条的移动,迫使镗刀切入工件,其切 This radial adjustable boring head is characterized by: a boring bar body is equipped with a hydraulically driven piston, relying on the movement of the piston, the tool produces a slight displacement, so as to achieve precise feed. As shown, the rotatable boring bar body is mounted on a bearing within the support member and axially positioned by its shoulder. The bearing mounted on the bearing has an eccentricity e relative to the body of the boring bar. In the head of the boring bar each equipped with a rough boring knife and fine boring knife. Rough boring knife directly fixed on the boring bar, while the fine boring knife is mounted on a flexible tool holder. The outer periphery of the support rod is a pinion, and the support member is provided with a rack gear which is engaged with the pinion gear and freely movable. Through the movement of the rack, forcing the boring knife into the workpiece, its cut