我厂以往在导轨磨床磨削机床床身时,一般使用千斤顶三点校正工件。当磨削加工时,由于支承点的数量少会发生变形不稳的现象,直接影响加工精度。为了弥补这一缺陷,我们于八四年研制出一套能稳定磨削床身精度的浮动锁紧千斤顶(见附图),以配合调节千斤顶使用,将支承点由三点改为六点,这样可以增加支承数量,减少工件变形。浮动千斤顶高于调节千斤顶15～20mm,弹簧的作用力是随工件重量的大小而设计的,一般小机床采用80～100N。当工件校正 I plant in the past in the rail grinder grinding machine bed, the general use of jack three-point calibration of the workpiece. When the grinding process, due to the small number of bearing deformation instability will occur directly affect the processing accuracy. In order to remedy this defect, we developed a floating locking jack that can grind the precision of the bed accurately in 1984 (see photo) to adjust the jack jack to change the supporting point from three to six. This can increase the number of support and reduce the deformation of the workpiece. Floating jack is higher than the adjustment jack 15 ~ 20mm, the spring force is the size of the workpiece with the design, the general small machine with 80 ~ 100N. When the workpiece is corrected