Direct-drive high-precision and high-rigidity closed hydrostatic guideway

Abstract

The invention relates to a direct-drive high-precision and high-rigidity closed static pressure guide rail, which includes a base, a carriage, a left guide rail plate, a right guide rail plate, a left guide rail pressure plate, a right guide rail pressure plate, a linear motor primary and a linear motor secondary, the left The guide rail pressure plate and the right guide rail pressure plate are respectively installed on both sides of the base, the left guide rail plate and the right guide rail plate are respectively installed on both sides of the carriage, and the left guide rail plate and the right guide rail plate are respectively equipped with multiple oil valves which function as internal feedback throttles. Pad, oil pad and the base, left guide rail pressure plate, right guide rail pressure plate form the oil film contact surface of the static pressure guide rail; the secondary of the linear motor is fixedly connected with the base; the primary of the linear motor is fixedly connected with the carriage through the connecting plate. The new guide rail structure of the present invention simplifies the oil supply of lubricating fluid and the assembly of parts, the linear motion accuracy of the guide rail is less affected by the change of the oil film gap caused by thermal deformation, improves the service life of the high-speed motion of the static pressure guide rail, and can meet the requirements of the grinding wheel of the follow-up grinding machine High-speed, high-precision and high-dynamic response requirements for rack feeding.

Description

technical field [0001] The invention relates to a static pressure guide rail, in particular to a high-precision and high-rigidity closed static pressure guide rail. Background technique [0002] With the development of science and technology, people have higher and higher requirements for the quality and precision of machined products. At the same time, the requirements for the speed of machine tools for processed products are also increasing. High-speed precision machine tools have become an important direction for the development of the machine tool industry. The static pressure guide rail is to inject pressure oil between the relative moving guide rail surfaces to make the moving parts float, and to ensure that the guide rail surfaces are in a state of liquid friction during the working process. Generally, static pressure guide rails are divided into two categories: open static pressure guide rails and closed static pressure guide rails. The open static pressure guide ra...

AI Technical Summary

Problems solved by technology

[0004] In addition, when the guide rail is doing high-speed reciprocating motion, the hydrostatic guide rail often produces excessive thermal deformation due to temperature rise, and the consequence is that the change in the horizontal gap of the hydrostatic oil film affects the performance of the guide rail

[0005] To sum up, either the lubricating oil circuit of the guide rail is set on different parts, resulting in complicated processing and difficult assembly of the oil circuit, or the influence of thermal deformation on the performance of the guide rail during high-speed operation is not considered, so it is necessary to improve the existing closed After the structure of the static pressure guide rail, a static pressure guide rail with simple lubricating oil circuit, easy assembly, and not affected by high-speed motion thermal deformation is proposed, so as to be suitable for high-speed reciprocating motion occasions

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