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Numerical control machine tool translational shaft geometric error measuring device and measuring and identifying method

A geometric error and CNC machine tool technology, applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc., can solve the problems of data processing troubles, increase measurement costs, etc., achieve low cost, high precision, and rich measurement information Effect

Active Publication Date: 2013-12-18
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at least four laser trackers are required to measure the target point at the same time, which greatly increases the measurement cost
The multi-station time-sharing measurement method solves the cost problem very well, but only measures the tool path, which brings a lot of trouble to the subsequent data processing

Method used

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  • Numerical control machine tool translational shaft geometric error measuring device and measuring and identifying method
  • Numerical control machine tool translational shaft geometric error measuring device and measuring and identifying method
  • Numerical control machine tool translational shaft geometric error measuring device and measuring and identifying method

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Experimental program
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Embodiment

[0053] A method for detecting and identifying the geometric accuracy of a translational axis of a CNC machine tool based on pose measurement, comprising the following steps:

[0054] (1) Multi-station time-sharing measurement pose steps

[0055] Before measuring, fix the cat's eye bracket near where the tool is installed. The cat's eye is installed at the end of the swing rod of the cat's eye bracket in advance, and the laser tracker is fixed on the B 1 location, such as figure 1 , figure 2 shown. The cat's eye bracket can rotate around the center of rotation, and can be precisely positioned every 60°. The cat's eye is installed at the end of the swing rod of the cat's eye bracket in advance, and the coordinates relative to the rotation center of the cat's eye bracket are strictly calibrated by a three-coordinate measuring machine. That is, take the center of rotation of the cat's eye bracket as the coordinate origin, the rotation plane as the XOY plane, and the starting...

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Abstract

The invention discloses a numerical control machine tool translational shaft geometric error measuring device and measuring and identifying method. A laser tracker is used for successively measuring axial feed movements of three fixed points of a single machine tool translational shaft at four different positions, the real-time poses of the translation shaft is calculated by the special continuous moving trajectory of the three fixed points, and errors of a machine tool are identified. Due to the fact the real-time poses of the translation shaft are measured, the acquired machine tool information is much richer than the information acquired by only measuring cutter moving trajectory, and error identification algorithm is quite simple. The method suitable for fast data processing, machine tool error fast compensation and precision detection in the field of machine tools has the advantages of high precision, fast and simple operation, rich measuring information, and the like.

Description

technical field [0001] The invention relates to precision measurement technology, in particular to the detection and identification of the geometric error of the translational axis of a numerical control machine tool based on pose measurement. Background technique [0002] Machine tools are machines for manufacturing machines. The quality of machine tools has a decisive impact on the development of the manufacturing industry, and the accuracy of machine tools is the most important criterion for judging the quality of machine tools. There are two ways to improve the machining accuracy of machine tools: one is to improve the mechanical accuracy. This method was widely used at first, but with the further improvement of machining accuracy, the cost also increased exponentially, and the economy was not good. The second method is error compensation. This method has the advantages of low cost, short period and high efficiency, and has been widely studied and adopted once it was p...

Claims

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Application Information

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IPC IPC(8): B23Q17/00B23Q17/24
Inventor 郭俊杰李海涛王金栋邓玉芬万鹏周阿维杨佼邱娟魏海斌
Owner XI AN JIAOTONG UNIV
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