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Gear hobbing tooth surface error compensation method and system based on equivalent transmission chain error calculation

An error compensation and error calculation technology, applied in the field of error analysis and precision control of CNC machine tools, can solve problems such as gear hobbing errors, affecting accuracy, affecting gear pitch and tooth profile accuracy, etc.

Active Publication Date: 2019-12-13
CHONGQING UNIV
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  • Abstract
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Problems solved by technology

Among them, the transmission chain error of the CNC gear hobbing machine affects the accuracy of the generating motion between the hob and the workpiece during gear hobbing, which leads to hobbing machining errors and affects the gear pitch and tooth profile accuracy

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  • Gear hobbing tooth surface error compensation method and system based on equivalent transmission chain error calculation
  • Gear hobbing tooth surface error compensation method and system based on equivalent transmission chain error calculation
  • Gear hobbing tooth surface error compensation method and system based on equivalent transmission chain error calculation

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Embodiment Construction

[0177] The present invention will be further described below in conjunction with drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not as limitations of the present invention.

[0178] The hobbing tooth surface error compensation method based on the equivalent transmission chain error calculation provided in this embodiment, this method establishes a hobbing machining error prediction model based on the hobbing double-parameter envelope theory, considers the transmission chain error and the workpiece gear installation error, and predicts Process the tooth shape and pitch errors of gears; then decompose the hobbing process into several end sections, convert each error source into the equivalent eccentricity on the end sections, and reveal the transmission chain error, installation error and tooth surface error The mapping relationship between them; finally, the equivalent t...

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Abstract

The invention discloses a gear hobbing tooth surface error compensation method based on equivalent transmission chain error calculation, which comprises the following steps: establishing a gear hobbing machining error prediction model; predicting the tooth profile and pitch errors of a machined gear according to the transmission chain error and the work piece gear installation error; calculating amapping relationship among the transmission chain error, the installation error and the tooth surface error; and finally, making compensation for the tooth surface error through equivalent transmission chain error compensation based on a tooth surface error compensation value calculated according to the equivalent transmission chain error. According to the method, a workbench is selected as a main control object of error compensation, and the transmission chain error is offset by adjusting and controlling the position of the workbench. An accurate mapping relationship between the transmissionchain error and the tooth surface error is deduced, then, the equivalent transmission chain error compensation value is calculated according to a measured tooth surface error value, and finally, thetooth surface error is reduced through a transmission chain error compensation method based on position control of a workbench or a hob shaft. Therefore, the precision of gear hobbing machine is improved.

Description

technical field [0001] The invention relates to the technical field of error analysis and precision control of numerical control machine tools, in particular to a hobbing tooth surface error compensation method and system based on equivalent transmission chain error calculation. Background technique [0002] Gear hobbing is a gear manufacturing process with high production efficiency and wide application, but the precision of gear hobbing is affected by the multi-source errors of machine tools, tools and workpieces. Among them, the transmission chain error of the CNC gear hobbing machine affects the accuracy of the generative motion between the hob and the workpiece during gear hobbing, which leads to hobbing machining errors and affects the gear pitch and tooth profile accuracy. Under general gear hobbing conditions, the rotational speed of the worktable is much lower than that of the hob shaft, and the position control accuracy of the worktable of the gear hobbing machine ...

Claims

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Application Information

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IPC IPC(8): G05B19/404
CPCG05B19/404G05B2219/34119
Inventor 王时龙夏长久龙谭任磊康玲马驰王四宝周杰
Owner CHONGQING UNIV
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