Rapid measurement method for parallelism error of linear guide rails

A technology of straightness error and linear guide rail, which is applied in the direction of measuring devices, instruments, optical devices, etc., can solve problems such as low efficiency, waste of time, and cumbersome data processing.

Inactive Publication Date: 2015-07-29
BEIJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

Data processing is cumbersome

Method used

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  • Rapid measurement method for parallelism error of linear guide rails
  • Rapid measurement method for parallelism error of linear guide rails
  • Rapid measurement method for parallelism error of linear guide rails

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Embodiment Construction

[0041] Taking the gantry-type five-axis processing machine tool as an example, the Cartesian coordinate system of the machine tool is established, such as Figure 5 shown. The invention adopts the XD series laser interferometer produced by the American Automatic Precision Engineering Company (API) to measure the straightness error of the x-direction rail of the gantry-type five-axis processing machine tool. The device involved in this method includes a laser head (composed of an interferometer host and a front-end interference mirror), a 6-D sensing unit (mirror), a pentaprism, an adjustment fixture, and a measured x-direction linear guide.

[0042] Step 1 Directly measure the straightness error of the linear guide a

[0043] 1. Plan N test sampling points

[0044] Plan N test sampling points on the measured x-direction linear guide rail 5 at equal intervals.

[0045] 2. Component installation and optical path alignment

[0046] After planning the test sampling points, it ...

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Abstract

The invention relates to a direct measurement method, especially a rapid measurement method for the parallelism error of linear guide rails. Data points on the linear guide rails are measured and collected via a laser interferometer; linearity measurement result analysis is carried out on data of the collection points via a linearity data analysis module in an XD laser measurement system to obtain the linearity errors of the guide rails; and a parallelism error analysis module in the XD laser measurement system fits the linearity errors of the two guide rails to obtain the parallelism error of the guide rails. The method can be used to solve the problems including low efficiency, large error and complex data processing of a present measurement method.

Description

technical field [0001] The invention relates to a fast measuring method for the parallelism error of a linear guide rail, which belongs to the field of machine tool precision design. Background technique [0002] The worldwide competition in the equipment manufacturing industry has led to the development of machine tools in the direction of high precision and large scale. The parallelism error of the guideway, which has a very important impact on the performance of the machine tool, has always been concerned. Therefore, how to accurately, quickly and efficiently measure the parallelism error of the linear guide rail to improve the machining accuracy of the machine tool has important practical significance. [0003] Parallelism tolerance is a kind of orientation tolerance, which is the allowable variation in the direction of the measured element relative to the datum. The commonly used instruments and methods for detecting the parallelism error of machine tool guide rails a...

Claims

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Application Information

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IPC IPC(8): G01B11/26
Inventor 蔡力钢姜鑫刘志峰程强秦德霖
Owner BEIJING UNIV OF TECH
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