Method for detecting geometric accuracy of numerically-controlled machine tool based on multi-channel laser time-sharing measurement

A technology of numerical control machine tools and geometric accuracy, which is used in measurement devices, optical devices, instruments, etc.

Inactive Publication Date: 2011-05-18
XI AN JIAOTONG UNIV
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Problems solved by technology

[0008] In order to overcome the fact that the current detection method cannot meet the fast and high-precision detection requirements of machine tool precision, the purpose of the present invention is to provide a CNC machine to

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  • Method for detecting geometric accuracy of numerically-controlled machine tool based on multi-channel laser time-sharing measurement
  • Method for detecting geometric accuracy of numerically-controlled machine tool based on multi-channel laser time-sharing measurement
  • Method for detecting geometric accuracy of numerically-controlled machine tool based on multi-channel laser time-sharing measurement

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Embodiment Construction

[0047] like figure 1 , figure 2 Shown: a kind of numerical control machine tool geometric accuracy detection method based on laser multi-channel time-sharing measurement, it is characterized in that, comprises the following steps:

[0048] (1) Multi-channel time-sharing measurement steps

[0049] During the measurement, the machine tool is controlled to feed in three-dimensional space, and four measurement points are set on each side of its cube motion area. A laser tracker measures the same motion trajectory of the machine tool at least three base points successively. When the machine tool moves to the position of each measurement point, the machine tool stops moving, and the distance reading of the laser tracker at the position of the measurement point is recorded. After all the measurement points are measured, the distance measurement readings of the laser tracker at different measurement points are obtained. ; Then move the laser tracker to other base point positions, r...

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Abstract

The invention discloses a method for detecting the geometric accuracy of a numerically-controlled machine tool based on multi-channel laser time-sharing measurement. The same 3D space feed motion of the machine tool is successively measured by a laser tracker in different base point positions, and all errors of the machine tool can be separated out by the processing of measured data. The measuring process only involves the displacement measurement, so that the measurement accuracy is high. Moreover, compared with the traditional multi-station measurement principle, the system hardware cost is greatly reduced due to the adoption of the time-sharing measurement principle, and the detection efficiency is greatly improved as all the errors of the machine tool can be separated out by only one-time measurement. The method has the advantages of fastness, high accuracy and the like, and is suitable for detecting the accuracy of medium and high-grade numerically-controlled machine tools.

Description

technical field [0001] The invention relates to laser precision measurement technology, in particular to a geometric precision detection method of a numerically controlled machine tool based on laser multi-channel time-sharing measurement. Background technique [0002] With the continuous development of manufacturing and precision machining technology, the requirements for machining accuracy of CNC machine tools are increasing day by day. Therefore, how to quickly and accurately detect various errors of the machine tool and perform error compensation plays an extremely important role in improving the machining accuracy of the CNC machine tool. Because the geometric error is less affected by the environment, the repeatability is good, and the error compensation is easy, so it is the main research direction of the machine tool error compensation. [0003] At present, there are many methods used to detect the geometric error of CNC machine tools at home and abroad. The common ...

Claims

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Application Information

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IPC IPC(8): G01B11/00
Inventor 郭俊杰王金栋邓玉芬费致根贾天玖
Owner XI AN JIAOTONG UNIV
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