Static pressure guide rail system for machine tool

Abstract

The invention relates to a machine tool, in particular to a static pressure guide rail system for a machine tool, which is composed of an independent guide rail and a static pressure block, wherein the static pressure block in the higher position is an oil collecting block; the middle part of the oil collecting block is provided with an oil chamber; the oil chamber is connected with a spiral oil inlet pipe through an oil pipe joint; the inner diameter of the spiral oil inlet pipe is 3-4mm; an annular oil chamber groove is arranged in the oil collecting block on the periphery of the oil chamber; the oil collecting block is in a communicated and closed state and communicated with the oil chamber; the oil chamber groove is provided with oil outlets which are symmetrically arranged, and the oil outlets are respectively communicated with a spiral oil outlet pipe through oil pipe joints; the diameter of the spiral oil outlet pipe is 0.8-1mm; the outer side of the annular oil chamber groove is provided with an annular gas groove; and the gas groove is in a communicated and closed state and filled with high pressure gas. The invention can eliminate periodic fluctuations of the oil pressure, enhance the support rigidity and height of the oil pad and prevent high pressure oil from leakage, thereby reducing the environmental pollution, keeping the guide rail clean and enhancing the cleanliness of the hydraulic oil.

Description

technical field [0001] The invention relates to a machine tool equipment, in particular to a machine tool static pressure guide rail system. Background technique [0002] In order to reduce the friction of moving parts, medium and large machine tools generally adopt a hydrostatic guideway structure. The existing static pressure guide rails are mainly divided into open static pressure guide rails and closed static pressure guide rails according to the structural form, and are mainly divided into constant pressure oil supply static pressure guide rails and constant current oil supply static pressure guide rails according to the oil supply situation. No matter what kind of hydrostatic guide rail is used, the working principle is that the oil pump provides high-pressure oil, which enters the oil chamber after passing through the solenoid valve, and uses the pressure of the oil to maintain pure liquid friction on the two joint surfaces, and to ensure good motion accuracy of the g...

AI Technical Summary

Problems solved by technology

However, after long-term use, the existing structure of the hydrostatic guide rail system has the following defects: First, since the hydrostatic oil of all hydrostatic systems is supplied by an oil pump, no matter what kind of pump is used, such as a vane pump , plunger pumps, gear pumps, etc., all supply oil intermittently, and there is a problem of unstable oil pressure. At the same time, due to the distance of the oil circuit and the diameter of the pipe, the oil pressure at each part of the guide rail is different, and the oil pressure is not stable. Stability and unequal oil pressure will directly affect the accuracy of the machine tool; second, the thickness of the oil film is uncontrollable; third, whether it is an open hydrostatic guideway or a closed hydrostatic guideway, hydraulic oil is used to open and return, resulting in environmental pollution. At the same time, when the hydraulic oil returns, it will be polluted by iron filings, dust, cutting fluid, etc., which greatly improves the accuracy of the machine tool and reduces the service life of the machine tool

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