尤门刨床的抬刀装置有电磁的、机械波动的和风动的等几种结构。这类抬刀装置除风动的以外,都存在着抬刀量低的缺点。风动抬刀,虽然可以高抬刀,但易受风源波动的影响,风压低时,有抬不起的现象。因此上述抬刀装置,只能满足一般零件平面加工的要求。如果要加工如图1所示的深槽,师 Knife planer bed knife lifting device has electromagnetic, mechanical fluctuations and wind, and several other structures. In addition to this type of lift the knife carrying device outside the wind, there is the disadvantage of low lift knives. Air lift knives, although the knife can be high, but vulnerable to fluctuations in the wind, the wind pressure is low, can not lift the phenomenon. Therefore, the above-mentioned lifting device, can only meet the requirements of the general parts plane. If you want to process the deep groove shown in Figure 1, division