A machining center multi-axis linkage trajectory optimization method

By integrating servo feedback and spindle power information in multi-axis linkage machining in machining centers, and combining structural response to identify vibration coupling relationships, the trajectory is segmented and speed is adjusted in a coordinated manner. This solves the problem of difficulty in identifying trajectory changes and vibration coupling processes in existing technologies, and improves the stability and consistency of the machining process.

CN122284521APending Publication Date: 2026-06-26GUANGXI YUCHAI EQUIP MOULD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI YUCHAI EQUIP MOULD CO LTD
Filing Date
2026-04-27
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies lack the ability to comprehensively characterize the relationship between load changes, frequency distribution and structural response in multi-axis linkage machining in machining centers. They are difficult to identify the coupling process between trajectory changes and vibration, resulting in decreased machining stability and surface quality fluctuations. Furthermore, they lack a collaborative adjustment and feedback evaluation mechanism for trajectory change trends.

Method used

By integrating servo feedback and spindle power information to construct machining status perception, combining structural response to identify vibration coupling relationship, segmenting the trajectory and analyzing its changing trend, performing coordinated speed adjustment, and conducting status assessment and adaptive adjustment based on machining feedback data.

Benefits of technology

It achieves closed-loop control of trajectory optimization and processing status, improves the stability of the processing and the surface forming quality, and enhances the consistency and controllability of multi-axis linkage processing.

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Abstract

This invention discloses a multi-axis linkage trajectory optimization method for machining centers, belonging to the field of trajectory optimization technology. It addresses the problem of decreased machining stability caused by the superposition of trajectory curvature abrupt changes and vibration coupling during multi-axis linkage machining. The method achieves machining state perception by fusing servo feedback current to construct a load mutation index and extracting the dominant frequency component from the spindle power spectrum. It assesses the vibration coupling trend based on the matching relationship between the machine tool's natural frequency and the dominant frequency component, and performs segmented interpolation on the trajectory to generate curvature change trends. Vibration excitation source segments are screened, and disturbance reconstruction is achieved through transition trajectory point insertion. Simultaneously, the feed rate is synchronously modulated based on the trajectory change trend. During trajectory execution, vibration acceleration and servo current are collected to construct a machining stability characteristic index and perform feedback evaluation, thereby achieving closed-loop control of trajectory optimization and machining state, improving machining stability and forming quality, and enhancing multi-axis collaborative consistency.
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