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Angle-modified dual-torus double-enveloping toroidal worm pair and manufacturing method thereof

A toroidal worm and secondary envelope technology, which is applied to worms, worm gears, gear transmissions, etc., can solve the problems of prone to fatigue pitting, high contact frequency of worms and worm gears, and restrict the bearing capacity of transmission pairs, etc., and achieve micro meshing Effects of quality improvement, sparse distribution of contact lines, and long service life

Inactive Publication Date: 2010-06-23
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, similar to the traditional toroidal worm drive, there is also a secondary contact zone in the middle of the tooth surface of the double-toroidal double-wrapped worm gear. In this zone, the instantaneous contact lines cross each other, and the contact frequency of the worm gear is high, which is prone to fatigue pitting
It can be seen that the secondary contact area is the weak part of the tooth surface of the worm gear, which restricts the full play and further improvement of the bearing capacity of the transmission pair.

Method used

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  • Angle-modified dual-torus double-enveloping toroidal worm pair and manufacturing method thereof
  • Angle-modified dual-torus double-enveloping toroidal worm pair and manufacturing method thereof
  • Angle-modified dual-torus double-enveloping toroidal worm pair and manufacturing method thereof

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Embodiment 1

[0032] An angle-modified double-torus double-enveloping toroidal worm pair and a manufacturing method thereof. The manufacturing method of present embodiment 1 adopts following two steps to carry out:

[0033] Step 1: Manufacture the toroidal worm, such as figure 1 and 2 Shown: Grinding generation and dynamic coordinate system σ with double toroidal disc grinding wheel [2] installed on the tool seat 1 (o 1 i 1 , j 1 , k 1 ) of the toroidal worm blank [1], the tool holder and the moving coordinate system σ d (o d i d , j d , k d ) is fixedly connected, relative to the static coordinate system σ of the tool seat od (o od i od , j od , k od ) performs spiral motion, and the spiral motion parameter of the knife seat is p d , the toroidal worm blank [1] is relative to the static coordinate system σ of the toroidal worm o1 (o 1 i o1 , j o1 , k o1 ) to perform a rotary motion.

[0034] If the upward direction is the tool seat axis k od The positive and left-to-...

Embodiment 2

[0055] An angle-modified double-torus double-enveloping toroidal worm pair, which is composed of a toroidal worm and a worm gear. The center distance between the toroidal worm and the worm gear is a=320mm, and the number of heads of the toroidal worm is Z 1 = 12, the transmission ratio of the toroidal worm to the worm gear i 12 =4.

[0056] Due to the large number of worm heads and small transmission ratio, the tool holder axis deflection angle Δ∑ can be selected as the basic angle modification variable, and Δ∑=20°, so the process transmission ratio i can be calculated 1d for

[0057] i 1d = i 12 cosΔΣ-sinΔΣ=4×cos20°-sin20°=3.42

[0058] Then get the process center distance a d and the helical motion parameter p of the tool seat d respectively

[0059] a d =acos 2 Δ∑=320×(cos20°) 2 =282.57nm

[0060]

[0061] All the other are with embodiment 1.

[0062] This embodiment not only has a series of excellent meshing characteristics of the angle-modified double toroi...

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Abstract

The invention relates to an angle-modified dual-torus double-enveloping toroidal worm pair and a manufacturing method thereof. The technical scheme is as follows: firstly manufacturing a toroidal worm, and using a dual-torus disc grinding wheel (2) for grinding a toroidal worm blank (1), wherein the included angle between the axial line kod of a cutter holder and the axial line kol of the worm blank (1) is 90 degrees plus the axial line deflection angle delta sigma; leading the cutter holder to do the spiral motion, wherein the parameter is pd; and the transmission ratio of the worm blank (1) to the cutter holder is ild, the central distance is ad, and the angle modifying parameter delta sigma, the ild, the ad and the pd are determined according to the formula of the technical scheme. The technical scheme further comprises the steps of roll-cutting a worm gear, and leading the generating surface of a toroidal roller-cutter to be consistent with the spiral surface of the toroidal worm; leading the relative position and the relative motion of a cutter and a worm gear blank to be the same with the corresponding toroidal worm pair, and carrying out radial feed till the central distance of the toroidal roller-cutter and the worm gear blank is equal to the central distance a of the worm pair. The manufactured angle-modified dual-torus double-enveloping toroidal worm pair has the advantages of large bearing capacity, high transmission efficiency and long service life, and can be used in the situations of multiple heads and small transmission ratio.

Description

technical field [0001] The invention belongs to the technical field of manufacturing a secondary enveloping toroidal worm pair, and in particular relates to an angle-modified double-toroidal secondary enveloping toroidal worm pair and a manufacturing method thereof. Background technique [0002] Double toroidal double-enveloping toroidal worm drive, using the torus as the production surface of the worm helical surface, can process both sides of the worm tooth groove at the same time; the worm gear tooth surface is composed of the production surface and the worm helical surface Consistent torus hob fan into. In addition to excellent manufacturing process and the ability to be applied to occasions with multiple heads and small transmission ratios, the double-toroidal two-pack transmission also has a series of excellent meshing characteristics, such as the long double-line working area of ​​the worm, and the wide contact area of ​​the worm gear tooth surface And the instantane...

Claims

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Application Information

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IPC IPC(8): B23F13/00B23F11/00F16H1/16
Inventor 赵亚平张昭魏文军李海涛董学朱
Owner WUHAN UNIV OF SCI & TECH
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