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1978年,我公司由瑞士引进一台NIV-1800四座标数控龙门铣床,机床用的润滑剂是随机带来的外国油品,说明书上并未阐明油品的牌号和生产厂家,只说本机床液压系统推荐使用2.4°～3°Engler(50℃)的油品。另外,机床液压正常用油量300公升,但不知何因,机床安装完毕后油箱内只剩不足200公升油。因此,按动开关后润滑故障报警器嘶鸣不止,主轴不转。当时,进口油的货源很难找到,于是,在科学分析、正确判断的基础上尽快解决用国产油代用的问题摆上了日程。 1.NIV-1800进口机床推荐用油 该机床技术资料上推荐机床液压系统用油如下: 液压油应是石腊基高质量矿物油脂,具有天然粘度,其粘度指数不低于100,工作温度不得超过45℃～55℃。 油质粘度:3～4.5Engler(50℃) 油量:300升(79[美]加仑) 要求:液压油不能受太大的温度波动,不能含水,近期的液压油不能用。 根据以上资料,无法确定液压油的牌号及其它质量指标。我们对机床带来的进口油进行了质量分析,情况如下;粘度(50℃)厘沲——30.7;粘度指数——106;闪点,℃(闭口)——232;临界负荷PK值(kgf)——86;水分及机械杂质——无。 2.国产代用油品的选用 由以上可见,该机床液压油既要带动液动机,又要满足静压导轨的工作需要。这就要液压油有适当的粘度,足够的承载能力,并把?
In 1978, our company imported a NIV-1800 four-axis CNC milling machine from Switzerland. The lubricants used in the machine tools are foreign oil products. The specification does not specify the grade and manufacturer of the oil products. Hydraulic system recommended 2.4 ° ~ 3 ° Engler (50 ℃) oil. In addition, the machine hydraulic normal oil consumption of 300 liters, but I do not know why, after installation of the machine less than 200 liters of oil tank. Therefore, press the switch lubrication fault alarm neighing more than the spindle does not turn. At that time, the source of imported oil was hard to find. Therefore, on the basis of scientific analysis and correct judgment, the issue of using domestic oil instead as soon as possible was put on the agenda. 1.NIV-1800 imported machine recommended oil The machine technical information on the recommended machine hydraulic system oil as follows: hydraulic oil should be paraffin-based high-quality mineral oil, with a natural viscosity, the viscosity index of not less than 100, the working temperature may not More than 45 ℃ ~ 55 ℃. Oil viscosity: 3 ~ 4.5Engler (50 ℃) Oil: 300 liters (79 [US] gallons) Requirements: hydraulic oil can not be too much temperature fluctuations, can not contain water, the recent hydraulic oil can not be used. Based on the above information, can not determine the grade of hydraulic oil and other quality indicators. The quality of the imported oil brought by the machine is analyzed as follows: Viscosity (50 ℃) cSt - 30.7; Viscosity Index - 106; Flash Point, ℃ (Closed) - 232; Critical Load PK Value (kgf ) - 86; Moisture and mechanical impurities - None. 2. The choice of domestically produced alternative oil It can be seen from the above that the hydraulic oil of the machine tool not only drives the hydraulic motor, but also meets the work needs of hydrostatic guideway. This will have the appropriate viscosity of hydraulic oil, adequate load carrying capacity and?