把龙门刨床的刀架换为磨头,能实现磨削运动,已为众所公认,问题在于垂直进刀量的控制.龙门刨的进刀量一般在十忽米以上(如0.25～25),而磨削在微米,相差至少一个数量级;若直接依靠刨刀架的大螺距丝杆控制砂轮的进刀,不但精加工尺寸难以保证,操作也不安全。现以B724龙门刨改装导轨磨为例,说明磨头垂直微进给系统的设计(图1)。 The planer knife planing for the grinding head, to achieve grinding movement, has been well-recognized, the problem lies in the vertical feed rate control. The gantry plane infeed generally more than ten meters (such as 0.25 to 25) , While the grinding in the micron, a difference of at least an order of magnitude; if directly rely on the plow cutter control of large pitch screw feed wheel, not only difficult to ensure the size of the finishing, the operation is not safe. Now B724 gantry modified rail mill as an example to illustrate the vertical micro-grinding head feed system design (Figure 1).