我们发现M131磨床大修后,出现这样一种奇怪现象:液压快进接通5(?)后磨头才开始快进; 当连续变换“快进快退”换向阀时,上述现象立即消失。为此,我们从分析快进原理入手,通过故障原因分析,找到了解决办法。快进原理见图1所示, A、 B分别接到进油或回油口。图2是液压快进缸缓冲装置。当活塞到达行程终端前,活塞开始阻截节流口,使 We found that M131 grinder after overhaul, there was such a strange phenomenon: hydraulic fast-forward connected to 5 (?) After grinding began to fast forward; when the continuous change “fast forward rewind” valve, the phenomenon disappeared immediately. To this end, we start from the analysis of fast forward, through the analysis of the cause of the problem, found a solution. Fast forward principle shown in Figure 1, A, B were received into the oil or back to the oil port. Figure 2 is a hydraulic quick-moving cylinder buffer device. When the piston reaches the end of the stroke, the piston begins to block the throttle orifice