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Rapid measuring and error compensation method for linearity error of linear guide rail

A straightness error and error compensation technology, which is applied in the field of machine tool precision design, can solve problems such as complex data processing, low measurement methods, and large errors

Inactive Publication Date: 2015-07-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention proposes a fast measurement and error compensation method for straightness errors of linear guide rails, which solves the problems of low measurement methods, large errors and complicated data processing in existing methods

Method used

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  • Rapid measuring and error compensation method for linearity error of linear guide rail
  • Rapid measuring and error compensation method for linearity error of linear guide rail
  • Rapid measuring and error compensation method for linearity error of linear guide rail

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Experimental program
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Embodiment Construction

[0085] 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 4 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, a 6-D sensing unit 3, an adjustment fixture 6, and a measured x-direction linear guide; the laser head includes an interferometer host 1 and a front-end interferometer 2,

[0086] Step 1 Plan N test sampling points

[0087] Plan N test sampling points on the measured x-direction linear guide rail 5 at equal intervals.

[0088] Step 2 Component installation and optical path alignment

[0089] After planning the test sampling points, it is necessary to complete the component installation and optical path alignment o...

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Abstract

The invention provides a rapid measuring and error compensation method for linearity error of a linear guide rail, and aims at solving the problems of small measurement method, large error and complex data treatment in the prior art. The method comprises the steps of measuring and acquiring a plurality of data points on the linear guide rail through a laser interference instrument; analyzing the linearity measurement result for the data of the acquired points through a linearity data analyzing module in an XD laser measurement system so as to obtain the linearity error of the guide rail. With the adoption of the method, the mounting error, environmental error, delay error and the error caused by thermal expansion of a measured object in measuring can be analyzed; an error correcting model is built.

Description

technical field [0001] The invention relates to a method for fast measurement and error compensation of the straightness error of a linear guide rail, belonging to the field of machine tool precision design. Background technique [0002] For heavy-duty CNC machine tools, the linear motion guide rail of the machine tool is an important part of the machine tool, and it is the benchmark for the relative position and movement of the main parts of the machine tool. Its accuracy directly affects the mutual positional relationship between the forming movements of the machine tool, and its straightness error reflects the The assembly error has a great influence on the accuracy of the processed workpiece. Therefore, how to accurately obtain the straightness error of the guide rail and finally improve the machining accuracy of the workpiece has important practical significance. [0003] Straightness tolerance refers to the allowable variation of the actual measured straight line to t...

Claims

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Application Information

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IPC IPC(8): G01B11/27
Inventor 蔡力钢姜鑫刘志峰程强秦德霖
Owner BEIJING UNIV OF TECH
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