A method for testing the surface shape error of the static pressure guide rail of a machine tool

Abstract

The invention discloses a method for testing machine tool hydrostatic guideway surface shape error, and the method comprises the following steps: (1) the number of test sampling points on a hydrostatic guideway guide surface is planned; (2) a laser interferometer is arranged on the surface of a workbench and is used for measuring a pitch angle of the workbench; (3) two displacement sensors are arranged on the workbench and are used for measuring hydrostatic guideway surface variation based on the workbench; (4) according to the distance of each step in a recursion test, to-be-tested parts on the hydrostatic guideway guide surface are equally divided and marked; (5) the measurement starts, one step distance runs once from zero position, step distances connect end to end, and readings of the laser interferometer and the displacement sensor are recorded; and (6) a shape error of the hydrostatic guideway guide surface is obtained through data analyzing and processing. According to the invention, the measurement of machine tool hydrostatic guideway guide surface shape error can be directly completed through cooperation of the laser interferometer and the displacement sensor.

Description

technical field [0001] The invention relates to the field of shape error measurement, in particular to a method for testing the surface shape error of a static pressure guide rail of a machine tool. Background technique [0002] Worldwide competition in the equipment manufacturing industry has led to the development of high-precision and large-scale machine tools (Cai Ligang, Jiang Xin, Liu Zhifeng, Cheng Qiang. A rapid measurement method for parallelism errors of linear guide rails: CN, CN 104807417 A[P ].2015.). The shape error of the guide surface of the guide rail is an important factor affecting the motion accuracy of the machine tool. Therefore, accurately obtaining the shape error of the guide rail guide surface is an important prerequisite for improving the motion accuracy of the machine tool, and has important practical significance. Due to the high precision of the machine tool and the important position of the static pressure guide rail of the machine tool in the...

AI Technical Summary

Problems solved by technology

Due to the high precision of the machine tool and the important position of the static pressure guide rail of the machine tool in the precision of the machine tool, the shape error of the guide surface of the machine tool static pressure guide rail is difficult to directly measure and the difficulty of measurement is high. The shape error of the existing guide rail guide surface Most of the test methods are measured before the machine tool is assembled or after the machine tool is disassembled during work.

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