Y54A插齿机液压让刀系统中,柱塞油泵与让刀油缸是直通的。正常工作时,柱塞返回行程对油缸中的油有“抽吸”作用,这是符合插齿时让刀要求的。由于这种“抽吸”作用,有可能将空气从某些缝隙中吸入,而一旦系统中混入空气,就很难将空气从系统中排出去,因此,也就失去了让刀功能。为了克服这种弊病,作如下改进。 Y54A gear shaper hydraulic knife system, the plunger pump and let knife cylinder is straight through. Normal work, the plunger return stroke of the oil in the cylinder “suction” effect, which is consistent with the tooth cutter knife requirements. Because of this “pumping” effect, it is possible to draw air in through some gaps, and once air is mixed in the system, it is difficult to discharge the air out of the system and, therefore, the knife is lost. In order to overcome this disadvantage, make the following improvements.