Method for hobbing disc cylindrical gear type spiral involute gear

A technology of involute gears and processing methods, applied to elements with teeth, belts/chains/gears, gear teeth, etc., to achieve the effect of simple process methods

Inactive Publication Date: 2011-10-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to design a special hob for the disc-shaped cylindrical gear-type spiral involute gear, and to process the two

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

Example one.

As shown in Figure 1, a method for hobbing a dish-shaped cylindrical gear type spiral involute gear is characterized by

--> During hobbing, the hob is fed along the oblique direction between the axial and radial directions of the gear. The slope of the oblique direction is equal to the slope of the normal to the tooth profile k j , The slope k j The oblique feed angle θ with the hob, the normal pressure angle, the end pressure angle, the helix angle on the index circle and the normal pressure angle of the hob have the following relations:

.

The tooth tip conical generatrix and tooth root conical generatrix of the dish-shaped cylindrical gear type spiral involute gear are perpendicular to the tooth profile plane, and the size of the back cone generatrix is ​​parallel to the tooth profile plane, and the tooth surface width is symmetrically distributed on both sides of the node. The tooth top height on the profile plane is equal to the hob modulus, and the tooth ro...

Example Embodiment

Example two.

A method for hobbing a dish-shaped cylindrical gear type helical involute gear, which is characterized in that the hob is moved along the oblique direction of the gear axial and radial direction during the hobbing process. The oblique slope Equal to the slope of the normal to the tooth plane k j , The slope k j The oblique feed angle θ with the hob, the normal pressure angle, the end pressure angle, the helix angle on the index circle and the normal pressure angle of the hob satisfy the following relationships:

.

The tooth tip conical generatrix and tooth root conical generatrix of the dish-shaped cylindrical gear type spiral involute gear are perpendicular to the tooth profile plane, and the size of the back cone generatrix is ​​parallel to the tooth profile plane, and the tooth surface width is symmetrically distributed on both sides of the node. The tooth top height on the profile plane is equal to the hob modulus, and the tooth root height is equal to 1.25 tim...

Example Embodiment

Example three.

A method for hobbing a dish-shaped cylindrical gear type spiral involute gear, which is characterized by using a CNC gear hobbing machine or a simple CNC gear hobbing machine or an ordinary gear hobbing machine to install between the axial feed screw and the radial feed screw The change gear mechanism processes the progressively shifted gear. When the hob moves along the axial direction of the gear according to the hobbing of the ordinary spur gear, it also performs radial interpolation, radial interpolation and interpolation along the axial direction of the gear. The ratio of the compensation speed is equal to the slope of the normal to the tooth plane k j , The slope k j The oblique feed angle θ with the hob, the normal pressure angle, the end pressure angle, the helix angle on the index circle and the normal pressure angle of the hob satisfy the following relationships:

.

The tooth tip conical generatrix and tooth root conical generatrix of the dish-shaped cy...

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PUM

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Abstract

The invention discloses a method for hobbing a disc cylindrical gear type spiral involute gear. The disc cylindrical gear type spiral involute gear can be directly hobbed by adjusting the parameters of a general hobbing cutter on a numerical control hobbing machine or a modified common hobbing machine to make the parameters accord with relationships shown in the specifications. The method has the advantages of simple process, high processing efficiency and low cost.

Description

technical field The invention relates to a processing method of mechanical parts, in particular to a method for generating and processing gears with a new type of tooth profile that can be used for intersecting shaft transmission and meshing speed gears, in particular to a dish-shaped cylindrical gear type spiral progressive Hobbing method of open wire gear. Background technique As we all know, the principle of speed uniformity of involute gear transmission is based on the fact that the speed of the meshing point moving along the common normal of the involute is uniform on the common normal (usually 20° pressure angle). This is no problem for parallel shaft spur gear drives. For bevel gear transmission with intersecting shafts, only spherical involute can satisfy the principle of uniformity of involute gear transmission speed. But the processing quality of the spherical involute is difficult to guarantee, so the uniformity of the transmission speed is poor, and the transmi...

Claims

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Application Information

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IPC IPC(8): B23F5/20
Inventor 黄因慧田宗军沈理达刘雷刘志东汪炜高雪松
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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