这种镗头由粗调、精调两部分组成,彼此既相互独立又相互联系,锁紧后互不干扰。依靠螺杆的旋转带动主滑座的滑移可实现粗调;依靠凸轮圈的转动使得前滑座滑移,可达到精调的目的。由于凸轮圈的螺旋线升程小(1圈为1mm),因此凸轮圈上分格线之间的距离较宽,利于保证精度。 This boring head from coarse, fine tune the two components, both independent of each other but also linked to each other after locking each other without interference. Rely on the rotation of the screw main slide slip can be achieved coarse; relying on the rotation of the cam ring makes the front slip, can achieve the purpose of fine tuning. Due to the small helical lift of the cam ring (1mm for 1mm), the distance between the grids on the cam ring is wide, which will help ensure the accuracy.