Friction lever driving air static pressure guide rail

Abstract

The invention relates to a friction lever driving air static pressure guide rail, belongs to the technical field of machine tool equipment units and components, and has the benefits as follows: 1, an upper cross beam and a lower cross beam are adopted for forming a double-cross beam structure, so that the rectangular air static pressure guide rail is high in motion accuracy, frictionless, free from pollution; a back pressure structural design is adopted, an aerostatic guide rail mover is utilized to be arranged on the lower cross beam in a sleeving manner, so that an aerostatic back pressure area is formed between the upper surface of the aerostatic guide rail mover and the upper cross beam, and the load-bearing rigidity of the aerostatic guide rail is improved; besides, with the adoption of the friction lever driving structure, the advantages of high precision, micro-feeding and no transmission clearance are achieved, and the friction lever driving air static pressure guide rail is more economic and practical compared with the driving method adopting a linear motor or ball screw; 2, the aerostatic guide rail mover of the air static pressure guide rail adopts a porous restriction material, thereby being high in rigidity, high in the load-bearing capacity and high in precision, and capable of ensuring a good sliding effect while meeting the back pressure requirements; 3, by adopting a pre-tightening mechanism comprising a puller bolt and a preloaded spring for pre-tightening a pre-tightening friction wheel, the operation is convenient, the pre-tightening effect is good, and the stepless regulation on the pre-tightening force can be realized.

Description

technical field [0001] The invention belongs to the technical field of machine tool unit components, and relates to an optical element ultra-precision grinding and polishing machine tool, in particular to a friction rod-driven gas static pressure guide rail. Background technique [0002] With the rapid development of science and technology, not only in aerospace and other cutting-edge scientific and technological fields, but also in the civilian field, higher and higher requirements are placed on the machining accuracy of parts, especially the surface shape accuracy and surface roughness of parts. Polishing is an important process of parts processing. Improving the precision and efficiency of polishing is of great significance to the development of ultra-precision machining technology. [0003] Since the polishing process is actually a surface shape replication process, the surface shape accuracy and surface roughness of the polishing disc determine the accuracy of the workp...

AI Technical Summary

Problems solved by technology

At present, the surface shape of the polishing disc is mostly modified by the traditional calibration disc dressing method, that is, the large calibration disc and the workpiece are placed on the polishing disc at the same time, and the friction characteristics between the calibration disc and the polishing disc are used for trimming and removal, and the trimming accuracy is uncertain. Sexuality, high dependence on experience, and inconvenient operation

Images