Real-time monitoring method of track error of five-axis linkage processing machine tool

A five-axis linkage and processing machine tool technology, which is applied in computer control, instruments, simulators, etc., can solve the problems that affect the processing efficiency and quality, and the machine tool trajectory error monitoring cannot realize real-time monitoring, etc., to achieve strong openness and simple calculation process Efficient effect

Active Publication Date: 2018-08-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the machine tool trajectory error monitoring cannot realize real-time monitoring during five-axis linkage machining, which affects the processing efficiency and quality. While monitoring, it has strong openness and applicability

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  • Real-time monitoring method of track error of five-axis linkage processing machine tool
  • Real-time monitoring method of track error of five-axis linkage processing machine tool
  • Real-time monitoring method of track error of five-axis linkage processing machine tool

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 shown.

[0041] A method for real-time monitoring of trajectory error of a five-axis linkage processing machine tool. Its biggest feature is that the trajectory error monitoring is an acquisition-calculation cycle process that has nothing to do with the interpolation period. The specific steps are:

[0042] First, read the NC code before processing, extract and sequentially store the theoretical trajectory information corresponding to the program segment;

[0043] Secondly, during the machining process, based on the acquisition and analysis of the position loop signal of the machine tool servo system, error compensation and homogeneous kinematic transformation, the actual tool position coordinates in the workpiece coordinate system are obtained;

[0044] Third, use the time sequence and the method of analyzing the rela...

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Abstract

The invention discloses a real-time monitoring method of a track error of a five-axis linkage processing machine tool. The method is characterized by comprising the following steps: firstly, reading NC codes before processing, and extracting track information corresponding to program segments; in a machining process, performing position loop signal acquisition and analysis, error compensation andhomogeneous kinematics transformation of a servo system of the machine tool to obtain actual cutter location point coordinates under a workpiece coordinate system; determining a program segment corresponding to the current actual cutter location point, and calculating a track error vector by combining theoretical track information corresponding to the program segment; and after the current state track error calculation is completed, continuing the next acquisition-calculation cycle. The method disclosed by the invention can realize real-time monitoring of the track error of the five-axis linkage processing machine tool and can be used for monitoring and evaluating the dynamic machining precision of the machine tool.

Description

technical field [0001] The invention relates to a method for real-time monitoring of the track error of a five-axis linkage machining machine tool, specifically a method for collecting the actual machining track of the machine tool in real time and comparing it with the theoretical machining track to obtain the track error during the five-axis linkage machining of the machine tool. Background technique [0002] With the increase in the complexity of parts structure and precision requirements, five-axis linkage machine tools are widely used in high-end manufacturing fields such as aerospace and precision machinery due to their excellent performance in processing complex spatial surfaces. For modern high-speed and high-precision machine tools, geometric precision control has reached a very high level. Comparatively speaking, dynamic errors have a greater impact on the machining quality of machine tools, especially when complex surfaces are processed in five-axis linkage. The d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/404
CPCG05B19/404G05B2219/35408
Inventor 李迎光程英豪郝小忠刘长青
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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