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A machining method for continuous generation and shaping of non-circular gears

A processing method and technology of non-circular gears, applied in the direction of components with teeth, belts/chains/gears, gear teeth, etc., can solve the problems of processing principle errors, limit the feed speed of each axis of the machine tool, and redundant codes, etc. The effect of shortening the manufacturing cycle

Active Publication Date: 2017-12-15
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method firstly has machining principle errors, and secondly, the code is lengthy. During the machining process, each axis of the machine tool is accompanied by frequent acceleration and deceleration, which limits the improvement of the feed speed of each axis of the machine tool.

Method used

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  • A machining method for continuous generation and shaping of non-circular gears
  • A machining method for continuous generation and shaping of non-circular gears
  • A machining method for continuous generation and shaping of non-circular gears

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] see Figure 4 , in order to adopt the method of the present invention, inserting the external meshing fifth-order elliptic spur gear with the constant speed of the rotary shaft of the inserting tool to insert the cross-sectional view of the tool position track, the external meshing fifth-order elliptic spur gear pitch curve equation is,

[0089]

[0090] The workpiece to be processed is an external meshing fifth-order elliptical spur gear, and the gear parameters related to processing: semi-major axis A=108.201mm, order n=5, tooth width b=50mm, eccentricity k=0.04, normal modulus m n =4mm, number of gear teeth Z=55, polar angle The determination of processing technology parameters can be selected with reference to the processing of cylindrical gears. Here, it is taken as: the number of teeth of the slotting tool z=18, the number of strokes of the vertical moving axis of the slotting tool is 200 times / min, the radial speed is 1mm / min, and the rotation speed of the s...

Embodiment 2

[0099] see Figure 6 , in order to adopt the method of the present invention, inserting the external meshing six-order elliptic helical gear tool position track sectional view with the constant speed of the inserting tool rotary shaft, the external meshing six-order elliptic helical gear pitch curve equation is the same as formula (12), which is related to processing Gear parameters: semi-major axis A=131.830mm, order n=6, tooth width b=50mm, eccentricity k=0.05, normal modulus m n =4mm, number of gear teeth Z=65, polar angle The direction of rotation of the gear is right-handed, and the helix angle is 15°. The determination of processing technology parameters can be selected with reference to the processing of cylindrical gears. Here, it is taken as: the number of teeth of the slotting tool z=18, the number of strokes of the vertical moving axis of the slotting tool is 200 times / min, the radial speed is 1mm / min, and the rotation speed of the slotting tool is 30° / min. min. ...

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Abstract

The invention relates to a machining method for continuously generating a non-circular gear into gear shaping. The machining method is based on a numerical control gear shaper. The numerical control gear shaper comprises a workbench, a tooth blank rotating shaft, a slotting tool rotating shaft, a slotting tool front-back moving shaft, a slotting tool up-down moving shaft and a flexible electronic gear case. A non-circular gear blank is fixed to the workbench of the numerical control gear shaper, and the tooth blank rotating shaft drives the workbench to move in a variable speed mode; when the rotating speed of the slotting tool rotating shaft is a constant rotating speed, the real-time speed of the tooth blank rotating shaft and the real-time speed of the slotting tool front-back moving shaft are calculated in real time through the flexible electronic gear case, and closed-loop control is further carried out, so that slotting of the non-circular gear blank is realized; and in the machining process, positional information of the tooth blank rotating shaft is monitored in real time, the velocity-ratio coefficient between the tooth blank rotating shaft and the slotting tool front-back moving shaft and between the slotting tool rotating shaft and the slotting tool up-down moving shaft is calculated in real time, and the speed of the tooth blank rotating shaft and the speed of the slotting tool front-back moving shaft are controlled in real time. By the adoption of the machining method, the manufacturing cycle of the non-circular gear is greatly shortened, and high-efficiency and high-precision slotting machining is realized.

Description

technical field [0001] The invention belongs to the field of gear manufacturing, in particular to the field of manufacturing non-circular gears capable of realizing gear ratio transmission, and in particular relates to a processing method for continuously generating and shaping non-circular gears. Background technique [0002] The gear shaping method is a gear processing method based on the principle of generation, which has the advantages of high processing efficiency, good tooth surface quality, and can adapt to the processing of non-circular external gears and non-circular internal gears with concave pitch curves. An ideal method for gear machining. For a long time, the gear shaping process of non-circular gears is based on the processing idea of ​​gradually generating pitch circles and pitch curves of non-circular gears, that is, a series of discrete points are obtained on the pitch curve of non-circular gears in advance, and the insertion When the tangent point between...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F15/02B23F5/16
CPCB23F5/16B23F15/02
Inventor 夏链韩江李大柱高婷田晓青
Owner HEFEI UNIV OF TECH