The hydrostatic guide rail of the cnc machining lathe is to transport the oil with a certain pressure through the throttle to the oil chamber between the sliding surfaces of the guide rail to form a pressure oil film, and float the moving parts so that the surface of the guide rail is in a pure liquid friction state. . According to the requirements of the load bearing, the static pressure guide rail of the CNC machining lathe is divided into open type and closed type. Open hydrostatic guides can only withstand vertical loads and have poor ability to withstand subversive moments; closed hydrostatic guides have the ability to withstand various loads and subversive moments.
The rail surface of the hydrostatic guide rail is in a pure liquid friction state, so no wear is generated, the precision is maintained well, the service life is long, and the friction coefficient of the guide rail is small (generally 0.0005 to 0.001), the mechanical efficiency is high, and the guide rail can be maintained for a long time. Guidance accuracy. The pressure oil film has large bearing capacity, good rigidity, good vibration absorption, stable running of the guide rail, and less creeping phenomenon at low speed. However, the structure of the static pressure guide rail is complicated, and it is required to have an oil supply system with good filtering effect, and the manufacturing cost is also high. This guide rail is mostly used in heavy-duty CNC machining machines.
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