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Method for machining ZC-shaped worm-gear pair

A processing method and technology of worm gear pair, applied in the direction of gear transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of difficult processing of three-head and four-head worms, no price competitiveness, difficulty in improving efficiency, etc. Achieve the effect of improving life and transmission efficiency, improving neutrality, and reducing bending deformation

Active Publication Date: 2018-05-22
SHANGHAI LONGYU ELEVATOR ACCESSORIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of worm drive is low efficiency. The efficiency of self-locking worm is only 40%-45%, the efficiency of single-head non-self-locking worm is 70%-75%, and the efficiency of double-head non-self-locking worm is 75%-82%. , the efficiency of three-headed and four-headed worms is 80% to 92%, but three-headed and four-headed worms are difficult to process and costly, and they are not price-competitive in the market
The arc-shaped worm (ZC type) has high efficiency, and the theoretical transmission efficiency reaches 85% to 95%. However, due to the influence of processing equipment and processing methods, under the existing processing technology, the efficiency of the ZC type worm is mostly between 85% and 95%. 88%, it is very difficult to further improve efficiency

Method used

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  • Method for machining ZC-shaped worm-gear pair
  • Method for machining ZC-shaped worm-gear pair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of processing method of ZC type worm-worm gear pair, the processing of worm specifically comprises the following steps:

[0027] (a) Process the center hole 1 on both ends of the worm, and use the center hole 1 as the positioning reference to process the bearing installation position 2 of the worm;

[0028] (b) With the bearing installation position 2 as the positioning reference, each shaft section of the worm is processed, including the end face 4, the undercut groove 6 and the overrun groove 5, and the worm tooth 3 is milled by a whirlwind milling machine, and the worm tooth surface is roughly ground, preliminarily The remaining coarse grinding allowance is 0.2 mm, and then the worm gear 3 is heat-treated, and carburized and quenched. After carburizing and quenching, the thickness of the carburized layer is 0.8 mm, and the hardness is 58HRC;

[0029] (c) Using the bearing installation position 2 as the positioning reference, finely grind the center hole 1 on b...

Embodiment 2

[0034] The difference between this embodiment and embodiment 1 is that the coarse grinding allowance reserved in step (b) is 0.3mm, the thickness of the carburized layer after carburizing and quenching is 1.5mm, and the hardness is 62HRC. The worm-worm gear pair processed in this embodiment is tested by a type test, and its transmission efficiency is above 90%.

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Abstract

The invention relates to a method for machining a ZC-shaped worm-gear pair. The method for machining a worm includes: (a) forming a worm central hole, and machining a bearing installation position ofthe worm with the central hole as a positioning reference; (b) machining various shaft sections with the bearing installation position as a positioning reference, milling worm teeth, and performing coarse grinding and heat treatment on the worm teeth; (c) performing accurate grinding on the central hole with the bearing installation position; and (d) performing accurate grinding on various shaft sections of the worm with the accurately grinded central hole as a positioning reference. The gear is machined by using a diameter-increasing hob, and an oil box for holding lubricating oil is formed on an engagement region. Compared with the prior art, the machining method can reduce bending deformation of the worm, can improve the centring performance of the worm shaft, can fully ensure the machining precision, and can improve the accuracy of the machining size of the worm; and the gear can form the oil box during engagement between the worm teeth and the gear teeth, lubricating is ensured, and the driving efficiency and the service life can be improved.

Description

technical field [0001] The invention relates to the technical field of worm machining, in particular to a machining method of a ZC worm-worm gear pair. Background technique [0002] The worm reducer can realize the power transmission between the spatially staggered axes, especially the power transmission between the spatially vertical staggered axes, and has the characteristics of smooth transmission, no noise, and large transmission ratio, and is widely used in modern industrial and civil facilities. . The biggest disadvantage of worm drive is low efficiency. The efficiency of self-locking worm is only 40%-45%, the efficiency of single-head non-self-locking worm is 70%-75%, and the efficiency of double-head non-self-locking worm is 75%-82%. , The efficiency of the three-headed and four-headed worms is 80% to 92%, but the processing of the three-headed and four-headed worms is difficult and costly, and they are not price-competitive in the market. The arc-shaped worm (ZC t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14F16H1/16
CPCB23P15/14F16H1/16
Inventor 叶伟民易淑强
Owner SHANGHAI LONGYU ELEVATOR ACCESSORIES
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