Phase error compensation technology in gear repeated machining

HE Ying-wu1,2, MEI Jiang-ping1, CHEN Guang-feng2
(1.School of Mechanical Engineering, Tianjin University, Tianjin 300354, China;
2.Guangzhou CNC Equipment Co., Ltd., Guangzhou 510535, China)

Abstract: Aiming at the problem that the precision of gear outline is difficult to guarantee due to error in repeated gear processing, the influence factors of tracking error and coupling error on gear repeated machining were researched. Combining with the application requirements of gear repeated machining, the composition of coupling error, the decisive influence of coupling error on contour accuracy and the compensation method of correlation error were summarized. A model of gear machining control system was proposed to compensate compling error by real-time phase error feedbook, and a new dynamic closed-loop compensation technology of phase error was developed. The validity of the dynamic compensation technology of phase error was tested by using the test platform of gear processing system, MATLAB was used for data simulation, experiments were carried out, the phase error changes before and after phase error compensation were compared. The results indicate that the dynamic closedloop compensation technology of the phase error can effectively reduce the phase error of the coupling linkage shaft, the phase error is reduced by 99%, the accuracy of repeated machining of gears is obviously improved. At the same time, the technology meets the real-time requirements, and it is suitable for engineering application.

Key words: gear repeated machining; phase error compensation; precision of gear outline; MATLAB