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A kind of manufacturing method of high-precision gear

A manufacturing method and high-precision technology, applied in the coating and other directions, can solve the problems of poor dimensional accuracy and surface finish, low production efficiency, poor meshing degree, etc., meet the shape standard, improve production efficiency, and good meshing degree. Effect

Active Publication Date: 2020-02-14
SANMING SUOFU PUMP IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for manufacturing high-precision gears, the main purpose of which is to overcome the problems of poor meshing degree, large vibration, large noise, poor dimensional accuracy and surface finish existing in the gears produced in the prior art during use. The phenomenon of trapped oil and leakage, difficulty in demoulding and low production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A method for manufacturing high-precision gears, comprising the following steps:

[0025] first step:

[0026] a. Taking a standard mold with a diameter of 40.02mm and a height of 37.048mm as a sample, make a first mold with the same height as the standard mold and a mold cavity diameter of 38.00mm; the cavity diameter difference between the standard mold and the first mold≧ 2mm is for the second injection, so that the PEEK material can be injected more smoothly along the peripheral gap of the standard mold;

[0027] b. The first injection molding: vertically place a mandrel of a cylindrical ceramic rod in the center of the first mold, and inject PEEK material into the first mold. The injection temperature is 580°C and the injection pressure is 29MPa; Injection molding in the environment, the PEEK material can be more closely combined to increase the stress of the gear, not only makes the gear not easy to deform during use, but also not easy to deform in the next injec...

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PUM

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Abstract

The invention discloses a manufacturing method of a high-precision gear. The manufacturing method comprises the following steps: a standard mold is used as a sample to manufacture a first mold as high as the standard mold and with a molding cavity diameter smaller than that of the standard mold; a mandrel is vertically and fixedly placed in the center of the first mold; then, a material is put in the first mold in an injection molding manner, and is demolded to obtain a rough product gear after cooling formation; the rough product gear is fixed in the center of the standard mold, and the secondary injection molding is performed along a peripheral gap of the standard mold; and the material is cooled for forming, and is demolded to obtain a final product. The manufacturing method of the high-precision gear has the following advantages: the gear is precise in size, smooth in surface, better in engagement degree and lower in noise; the phenomenon of oil trapping and leakage is reduced; the finishing of the gear is not needed any more; and the production efficiency is improved.

Description

technical field [0001] The invention relates to a method for manufacturing high-precision gears. Background technique [0002] As one of the most basic parts for transmitting motion and power, gears are widely used in the industrial field. Resin gears are inexpensive and can be mass-produced, but resins have shrinkage properties that tend to change shape and size during integral processing. At present, the method of producing resin gears is one-time injection molding, and the shrinkage characteristics of the resin cause the size of the produced gears to be small. In order to ensure the accuracy of the gear size, it needs to be carried out in a high temperature and high pressure environment, and as much material as possible should be injected into the cavity of the mold so that the size of the gear after cooling and shrinkage is roughly the same as the size of the required gear. This will cause the outer wall of the formed gear to be close to the inner wall of the mold cavi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/14B29C45/17B29C45/40
CPCB29C45/1418B29C45/40B29C2045/14245
Inventor 陶凯元林强兴
Owner SANMING SUOFU PUMP IND CO LTD