Closed hydrostatic guideway with hydrostatic oil film gap compensation function

Abstract

The invention relates to a closed static pressure guide rail with a static pressure oil film clearance compensation function. The closed static pressure guide rail comprises a base, a carriage and a guide rail plate, wherein a plurality of piston devices are arranged on a movable guide rail on one side of the carriage; an oil film contact surface formed by a static pressure oil cavity is formed between the piston devices and the guide rail plate on the base. Due to the novel guide rail structure of the closed static pressure guide rail, the capacity for automatically adjusting a clearance of the static pressure guide rail is realized, and the clearance change, which is caused by thermal deformation, of the static pressure guide rail can be better compensated; the phenomenon that the static pressure guide rail is locked due to over-high temperature rise in a high-speed reciprocating motion is avoided; the safety of the static pressure guide rail is improved; a requirement on high-speed, high-precision and high-dynamic response to feeding of a sand wheel frame of a following grinding machine can be met.

Description

technical field [0001] The invention relates to a static pressure guide rail, in particular to a closed static pressure guide rail with a static pressure oil film gap compensation function. 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 precision and 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. Due to its excellent performance, hydrostatic guide rails are gradually being paid attention to by people in recent years, and have been widely used in the machine tool industry. [0003] 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 rail can only bea...

AI Technical Summary

Problems solved by technology

[0004] When the existing closed static pressure guide rail is doing high-speed reciprocating motion, the static pressure guide rail is often thermally deformed due to excessive temperature rise, causing the horizontal gap of the static pressure oil film to decrease sharply, the thickness of the oil film cannot be maintained, and the rigidity of the oil film is reduced. The guide rail is stuck, and the adjustment ability of the traditional throttle feedback control often cannot meet the requirements, which affects the working performance of the machine tool

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