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Processing method of asymmetric gear with two pressure angles

A processing method and double pressure angle technology, applied in the field of gears, can solve problems such as easy broken teeth and reduced coincidence

Inactive Publication Date: 2007-08-01
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the pressure angle on both sides of the gear increases at the same time, the tooth tops of the gear teeth will become thinner, the coincidence degree will decrease, and the teeth will be easily broken during loading.

Method used

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  • Processing method of asymmetric gear with two pressure angles

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Effect test

Embodiment Construction

[0039] After loading the CAXA wire cutting software, input the involute equation and transition curve equation of the working tooth side and the non-working tooth side of the asymmetrical gear into the formula bar in the formula curve of the drawing tool bar, and the overall coordinate system adopts the Cartesian coordinate system. Angles are in radians. Enter the ranges of the four arguments into the From and To fields by calculation. The ranges of the four parameters are: α gd ≤α Md ≤α ad , α gc ≤α Nc ≤α ac , α d ≤α dx ≤π / 2,α c ≤α cx ≤π / 2, the precision is 0.02. After drawing these several curves in CAXA, the starting point of the involute of the working tooth side and the non-working tooth side does not coincide with the starting point of the transition curve, and the order of magnitude of the error value is 10 -5 ~10 -3 , the smaller the accuracy is, the smaller the error range is, here it is necessary to fuse the two starting points. Then input the equation o...

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Abstract

A double pressure angle asymmetric gear processing method belongs to gear technology field. The processing steps are: installing CAXA wire cutting software, inputting the involute equation and adjustment curve equation of asymmetrical gear work flank and non-work flank into the formula curve of drawing instrument column, inputting parameter into initial value column and stop value column, then inputting the equation of addendum arc into formula curve, setting the initial point of addendum arc parameter as the stop point of non-work flank adjustment curve; working out the tooth profile curve of involute gear, completing the tooth profile of whole involute gear through 360degreearray; transforming the total data of involute all-gear graph into wire cutting processing program order 3B code through the automatic transforming function of wire cutting software; the control system of wire cutting machine processes the involute gear which involute coefficient between 1.0 and 1.3289 through 3B code. The wire cutting process is more flexible, wheel carrying-capacity is higher and vibration is small.

Description

technical field [0001] The invention belongs to the technical field of gears, and in particular relates to a processing method for an asymmetrical gear with double pressure angles. Background technique [0002] With the development of gear transmission in the direction of high speed and heavy load, standard involute spur gears have disadvantages such as low contact strength of tooth surface and bending strength of tooth root, and poor lubrication of tooth surface. The performance of the involute gear has a great relationship with the pressure angle. When the pressure angle increases, the tooth root becomes thicker, the curvature radius of the tooth surface increases, and the Hertz contact stress decreases, which can improve the tooth root. Bending strength and contact strength of the tooth surface, and increase the central oil film thickness of the tooth surface. However, if the pressure angle on both sides of the gear increases at the same time, the tooth tops of the gear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H9/00B23H7/20B23H7/08G05B19/4099
Inventor 李威肖望强
Owner UNIV OF SCI & TECH BEIJING
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