牛头刨床的抬刀,一般都由人工操作。虽然,经过改革,有的采用了电器、液压或机械式抬刀装置。但是,这些装置有其不足之处。如液压式或机械式抬刀装置,是通过滑枕的往复,冲撞碰块或顶杆来达到抬刀目的。每当加工不同长度的工件时,就得对碰块进行调整。由于刀架拖板上下移动,以及旋转角度加工斜 Shaper raising the knife, usually by manual operation. Although, after the reform, some use of electrical, hydraulic or mechanical lift knives. However, these devices have their drawbacks. Such as hydraulic or mechanical lift device, through the reciprocating ram, collision block or ram to achieve the purpose of raising the knife. Whenever the processing of different lengths of the workpiece, you have to adjust the touch block. As the carriage carriage moves up and down, as well as the rotation angle of processing oblique