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前言 根据组合机床生产厂和使用厂的反映,自驱式动力头用的ly4241进给液压控制板的质量问题较多,性能不够稳定。主要表现为:内部和外部泄漏较大;启动时先后退一段距离再快进,有时将转换杠杆或液压操纵挡铁顶坏;进给部件在死挡铁工作时,溢流阀跳动、压力上升慢等。 为解决库存一批ly4241控制板的这几个质量问题,使其正常应用于组合机床产品和提高产品出厂后使用的可靠性,1964年1—4月本所液压组与大连机床厂液压车间合
Preface According to the combination of machine tool plant and the use of factory reflects the self-drive power head with ly4241 feed hydraulic control panel quality problems more, the performance is not stable enough. Mainly as follows: a larger internal and external leakage; start and then retreated a certain distance and then fast forward, sometimes the conversion lever or hydraulic control block top bad; feed block work in the death of iron, the relief valve beating, the pressure rise Slow wait. In order to solve the inventory of a number of ly4241 control panel of these quality problems, so that it is applied to the normal combination of machine tool products and improve product reliability after the factory, January 1944, the Institute of Hydraulic and Dalian Machine Tool Plant hydraulic workshop