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A method for equal rotation angle slotting of non-cylindrical gear blanks

A non-cylindrical, equal-angle technology, applied in the field of corner slotting, can solve the problems of not being able to process internal meshing non-cylindrical gears, tooth profile overcut deformation, etc.

Active Publication Date: 2016-08-24
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods can process externally meshed non-cylindrical gears with convex pitch curves using CNC hobbing technology, but they cannot process internally meshed non-cylindrical gears and some externally meshed non-cylindrical gears with concave pitch curves. This is because the hob axis is a straight line, it will inevitably lead to overcut deformation of the tooth profile

Method used

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  • A method for equal rotation angle slotting of non-cylindrical gear blanks
  • A method for equal rotation angle slotting of non-cylindrical gear blanks
  • A method for equal rotation angle slotting of non-cylindrical gear blanks

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Effect test

Embodiment 1

[0095] see image 3 , in order to adopt the method of the present invention to slot the external meshing elliptical spur gear tool position track sectional view, the pitch curve equation of the external meshing elliptic spur gear is,

[0096] r = a ( 1 - e 2 ) 1 - e cos ( n θ ) - - - ( 25 )

[0097] The workpiece to be processed is an external meshing elliptical spur gear, and its parameters are as follows: semi-major axis a=146.880mm, order n=1, tooth width b=50mm, eccentricity e=0.6, normal modulus m n =5mm, the number ...

Embodiment 2

[0099] see Figure 4 , for adopting the method of the present invention to insert the three-dimensional view of the external meshing right-handed elliptical helical gear tool position trajectory, the external meshing elliptical helical gear pitch curve equation is the same as formula (25), and the difference between it and the external meshing elliptical spur gear is that there is a certain helix angle. The workpiece to be processed is an external meshing right-handed elliptical helical gear, and its parameters are as follows: semi-major axis a=150mm, order n=1, tooth width b=50mm, eccentricity e=0.6, normal modulus m n =5mm, helix angle β c =11.912°, the number of gear teeth Z=52, the number of gear teeth z=30, and the polar angle θ∈[0,2π]; using the method of the present invention, in the electronic gearbox, the formula (25) is substituted into the non- The linkage mathematical model of cylindrical helical gear (2), the numerical control system calculates the tool position ...

Embodiment 3

[0101] see Figure 7 , for adopting the method of the present invention to slot the internal meshing elliptic spur gear cutter position trajectory cross-sectional view, the pitch curve equation of the internal meshing elliptic spur gear is the same as formula (25), and the difference between it and the external meshing elliptic spur gear is that the teeth are distributed inside the pitch curve . The workpiece to be processed is an internal meshing elliptical spur gear, and its parameters are as follows: semi-major axis a=147.960mm, order n=1, tooth width b=50mm, eccentricity e=0.6, normal modulus m n =3mm, the number of gear teeth Z=88, the number of teeth of the gear shaping cutter z=20, and the polar angle θ∈[0,2π]. By adopting the method of the present invention, in the electronic gearbox, the formula (25) is substituted into the linkage mathematical model (3) of the internal meshing non-cylindrical spur gear, the numerical control system calculates the tool position track...

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Abstract

The invention relates to a method for equal-angle slotting of a non-cylindrical gear blank. In this method, the gear blank is fixed on the working table of the gear shaping machine for operation. The gear shaping machine includes a working table, a main shaft and a gear shaping cutter; the working table drives the gear blank to rotate, and the working table rotates at a constant angular velocity per unit time The main shaft drives the gear shaping cutter to rotate, and the main shaft rotates at a variable angular speed; the indexing circle of the gear shaping cutter is tangent to the pitch curve of the gear blank and performs pure rolling, and at the same time, the main shaft rotates at a variable line The speed moves along the line connecting the center of rotation of the gear shaping cutter and the gear blank to form the pitch curve of the gear blank, and the gear shaping cutter moves along the Z axis in the vertical plane to form the full teeth of the gear blank. The present invention can insert and manufacture external meshing non-cylindrical spur gears and helical gears, and can also insert and manufacture internal meshing non-cylindrical spur gears and helical gears. The invention can realize high-efficiency and high-precision non-cylindrical gear processing, has lower requirements on detection elements, and has higher detection precision.

Description

technical field [0001] The invention belongs to the field of gear manufacturing, in particular to the field of gear manufacturing on wheels with varying working radii, and relates to a non-cylindrical gear tooth blank equal-angle slotting method. Background technique [0002] Non-cylindrical gears are mainly used in two-axis variable ratio transmission, which can realize the nonlinear relationship between the active mechanism and the driven mechanism. Its pitch curve shape is designed according to the motion requirements. Compared with other non-uniform speed mechanisms, it has obvious advantages. Advantages, non-cylindrical gear technology was produced in the 1930s and has applications in construction machinery, machine tools, automobiles, aerospace and other fields. Non-cylindrical gear transmission refers to gear transmission in which at least one pitch surface of the gear in the transmission is not a rotating surface. , The application advantages are obvious. The current...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F15/02
Inventor 韩江夏链刘有余李大柱
Owner HEFEI UNIV OF TECH
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