M5080导轨磨床的横梁升降调位运动机构复杂笨重,横梁总重约3t。为减轻传动机构的负载,设有高压油泵卸载系统(图1)。在启动横梁升降电机之前,必须先启动高压油泵,向油缸注油,通过柱塞、顶杆将横梁顶起来,卸去横梁加在梯形丝杠上的载荷,然后再启动升降电机。如果用手升降时,也是 M5080 rail grinder beam lifting movement mechanism complex and cumbersome, the total weight of the beam about 3t. In order to reduce the load on the transmission, a high-pressure oil pump unloading system (Figure 1) is provided. Before starting the beam hoist motor, you must first start the high-pressure pump, the oil cylinder, through the plunger, the top of the beam top up, remove the beam added to the screw on the lead screw, and then start lifting motor. If you lift by hand, too