Method and device for testing axial rigidity and radial rigidity of rotary hydrostatic guide rail

Abstract

The invention provides a method and device for testing axial rigidity and radial rigidity of a rotary hydrostatic guide rail. A rotary guide rail seat is fixed on a platform, a pressing plate and a rotary assembly are fixedly connected to form a rotary part, and the rotary part is used for guiding in a rotary motion way by depending on a hydrostatic guide rail pair; an axial load assembly comprises a flange sleeve, a screw rod, a thrust bearing, a radial bearing, a sleeve, a connecting piece, force sensors and a terminal pad which are vertically arranged; a radial load assembly comprises a flange sleeve, a screw rod, a thrust bearing, a radial bearing, a sleeve, a connecting piece, a force sensor, a loading piece and a connection bending plate which are horizontally arranged; and a mounting support of a displacement sensor assembly is fixed on the rotary guide rail seat, and a measuring head aligns to the rotary assembly. The method and device provided by the invention can be used for acquiring the axial and the radial rigidity data of the hydrostatic guide rail in a rotary motion and can also be used for an confirmatory experiment on a method for analyzing the rigidity of the hydrostatic guide rail in the rotary motion and the influence of oil film tangential adhesive force.

Description

technical field [0001] The invention belongs to the technical field of guide rail stiffness tests, and relates to a test device for the axial stiffness and radial stiffness of a rotary motion hydraulic static pressure guide rail, and also relates to a test method for the axial stiffness and radial stiffness of a rotary motion hydraulic static pressure guide rail. Background technique [0002] Hydraulic static pressure guide rails are divided into linear motion hydraulic static pressure guide rails and rotary motion hydraulic static pressure guide rails. The hydraulic static pressure guide rail has a large bearing capacity and strong anti-vibration ability, and occupies an important position in heavy machine tools, precision machine tools and other machinery. The structure and load of the hydrostatic guideway pair directly affect the oil film distribution in the hydrostatic guideway pair, and the oil film distribution will affect the stiffness of the hydraulic guideway pair, ...

AI Technical Summary

Problems solved by technology

The method of obtaining the stiffness of the hydraulic static pressure guide rail pair is to obtain it completely by experiment, which is very large in test volume and is not suitable for innovative development; the second is to obtain it by a complete analytical method, and the reliability of the analytical method and analytical results needs to be verified by experiments; The third is the method of combining analysis and experiment. The individual axial stiffness and radial stiffness are obtained by the test method. Based on the above individual stiffness, the comprehensive stiffness is solved by analytical method.

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