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Tooth pitch accumulative error compensation method for forming gear milling machining

A technology of accumulating errors and compensation methods, applied in the direction of gear teeth, components with teeth, belts/chains/gears, etc., can solve problems such as affecting production efficiency, affecting workpiece quality, and many parameters, and reducing calculation steps and parameters. The effect of improving the quantity and regulation efficiency

Inactive Publication Date: 2021-01-15
NANJING TECH UNIV +1
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AI Technical Summary

Problems solved by technology

Based on the above principles, it can be concluded that in the milling process, the dynamic and static characteristics of the fixture have a great influence on the machining accuracy of the gear. The milling force, milling heat, tool eccentricity, and workpiece geometric eccentricity in milling teeth will affect the final workpiece. quality, thus affecting production efficiency
However, at present, the milling process is to compensate each movement axis of the machine tool, with many parameters, cumbersome steps, and complicated calculations

Method used

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  • Tooth pitch accumulative error compensation method for forming gear milling machining
  • Tooth pitch accumulative error compensation method for forming gear milling machining
  • Tooth pitch accumulative error compensation method for forming gear milling machining

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Embodiment Construction

[0046] The method provided by the invention obtains the compensated tooth pitch error by virtually calculating the compensated eccentricity error, and if the compensated tooth pitch cumulative error does not meet the accuracy requirement, iterative compensation is performed according to this method until the accuracy requirement is met.

[0047] The present invention will be further described below in conjunction with accompanying drawing and embodiment example:

[0048] Such as figure 1 As shown, according to the working principle of gear milling by forming method, the motion axes of CNC gear milling machine include: the rotary motion of the gear blank (defined as the C axis) to realize the indexing of milling different gears; the milling cutter and the gear blank along the tooth The relative feed movement in the radial direction of the blank (defined as the x-axis) to complete the milling of the tooth groove; the movement of the milling cutter along the axial direction of th...

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Abstract

The invention provides a tooth pitch accumulative error compensation method for forming gear milling machining. According to the external configuration of a tool clamp, the positioning center of rollers arranged in a regular triangle shape is analyzed through the geometrical relationship. The method comprises the following steps that 1, eccentric calculation is carried out, and an eccentric errorej is obtained; 2, a high-speed gear milling space coordinate system is established, the mapping relation between the eccentric error and a tooth pitch accumulative error is obtained, and the workpiece tooth pitch accumulative error delta t is obtained through the eccentric error; and 3, the eccentric error is corrected, the workpiece tooth pitch accumulative error delta t' is obtained through theeccentric error value obtained after virtual calculation compensation, and if the tooth pitch accumulative error obtained after compensation does not meet the precision requirement, iterative compensation can be carried out according to the method till the precision requirement is met. According to the analysis method considering the tooth pitch error, the calculation steps and the parameter number are effectively reduced, and the adjusting efficiency is high.

Description

technical field [0001] The invention relates to the field of numerical control machining error compensation, in particular to a method for accumulative error compensation of forming milling gear machining tooth pitch. Background technique [0002] The basic principle of tooth milling by forming method is: using a shaped disc-shaped milling cutter with the same cross-sectional shape as the tooth groove of the processed gear, the milling cutter rotates at high speed and reciprocates along the tooth direction of the gear to complete the milling of a tooth profile and tooth width; After the previous tooth is milled, index once and then mill the second tooth. [0003] In the existing gear milling process, the workpiece to be processed is installed and positioned on the rotary table of the machine tool, and the positioning accuracy on the machine tool will directly affect the machining accuracy of the gear. Large rotary workpieces are installed on the CNC high-speed gear milling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23F1/06
CPCB23F1/06
Inventor 洪荣晶王帅仝志伟
Owner NANJING TECH UNIV
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