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一、液压系统改进 3M4630滚球磨床是大量大批生产的滚动轴承制造厂和滚球制造厂常用机床之一。我厂自一九六八年至一九七三年期间,共制造了近千台机床,经过几年来用户厂生产实践的考验,暴露了该机床尚存在不足之处,其中以液压系统问题较为突出。据用户厂反映,该机床液压系统存在问题如下: (一)油箱内油温太高,温升高达40℃左右,当夏天室温为30℃以上时,油箱内油温高达70℃以上。产生此异常高温的主要原因是液压系统内没有卸荷回路,致使大量油液在溢
First, the hydraulic system to improve 3M4630 ball mill is a large number of large-scale production of rolling bearings factory and ball factory one of the commonly used machine tools. I plant from 1968 to 1973, a total of nearly a thousand machine tools manufactured, after several years of user factory production practice test, exposing the machine there are still deficiencies, of which the hydraulic system problems are more prominent. According to the user plant reflects the machine tool hydraulic system problems are as follows: (A) the fuel tank temperature is too high, the temperature up to about 40 ℃, when the summer room temperature is above 30 ℃, the fuel tank temperature as high as 70 ℃. The main reason for this abnormal high temperature is that there is no unloading circuit in the hydraulic system, resulting in a large amount of oil in the overflow