Special powder metallurgy gear wheel and preparation method thereof

A powder metallurgy and gear plate technology, applied in belts/chains/gears, mechanical equipment, components with teeth, etc., can solve the problems of cracking in the finale area and other properties of the product that do not meet the requirements for use, and achieve low production costs. , suitable for automated production, the effect of high product strength

Inactive Publication Date: 2012-04-04
扬州保来得科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production method of powder metallurgy gear discs is generally completed by forming, sintering, heat treatment, pressing, etc., but for powder metallurgy gear disc shafts that require high pull-out force, small flange length, and small shaft-to-edge wall thickness (less than 1.5mm) For gear discs, the normal process can no long

Method used

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  • Special powder metallurgy gear wheel and preparation method thereof
  • Special powder metallurgy gear wheel and preparation method thereof
  • Special powder metallurgy gear wheel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the special powder metallurgy gear disc is composed of a gear disc 1 and a gasket 2, and the contact end surface between the gear disc 1 and the gasket 2 is connected by welding. During the preparation, operations such as forming, sintering, carburizing, and pressing are performed on the ordinary gear disc, and then the gasket is pressed on the gear disc, and the contact surface is welded into a whole through resistance. The specific preparation method is as follows:

[0018] (1) The gear disc is prepared according to the following powder metallurgy raw materials in parts by weight: Fe: 92.0 parts, C: 0.8 parts, Ni: 4.5 parts, Mo: 1.2 parts, Cu: 1.5 parts;

[0019] (2) Forming (60-ton forming machine), sintering (1120°C×0.5h), carburizing (830°C×2h, Cp: 0.8) and finalization (ordinary 1-ton press) were performed in sequence to produce gear plate.

[0020] (3) Press the gasket on the gear plate, and weld the shaft end face and the gear plate...

Embodiment 2

[0023] The preparation method is the same as in Example 1, wherein the gear disc is prepared according to the following powder metallurgy raw materials in parts by weight: Fe: 95.4 parts, C: 0.6 parts, Ni: 2.5 parts, Cu: 1.5 parts;

[0024] Required specification value Product actual value product density 7.0g / cm 3 MIN 7.15g / cm 3 Shaft breakout force 150kgf MIN 165~190kgf Product torque 1000kgf MIN 1250~1500kgf Tooth resistance 800kgf MIN 1200kgf Gear precision JIS6 grade JIS5 grade

Embodiment 3

[0026] The preparation method is the same as in Example 1, wherein the gear disc is prepared according to the following powder metallurgy raw materials in parts by weight: Fe: 91.0 parts, C: 0.5 parts, Ni: 3.0 parts, Mo: 0.5 parts, Cu: 3.0 parts.

[0027] Required specification value Product actual value product density 7.0g / cm 3 MIN 7.15g / cm 3 Shaft breakout force 150kgf MIN 165~190kgf Product torque 1000kgf MIN 1250~1500kgf Tooth resistance 800kgf MIN 1200kgf Gear precision JIS6 grade JIS5 grade

[0028] The manufacturing method of the special powder metallurgy gear plate of the present invention is easy to produce and operate, suitable for automatic production, high in production efficiency, can produce 4000PCS products every 8 hours, and has low production cost and high product strength, has good economic prospects, and can produce produce good social benefits.

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Abstract

The invention discloses a special powder metallurgy gear wheel and a preparation method. The special powder metallurgy gear wheel consists of a gear wheel and a gasket; the contact end faces of the gear wheel and the gasket are connected in a welding mode; and the gear wheel is prepared from the following powder metallurgy raw materials in part by weight: 90.0 to 98.0 parts of Fe, 0 to 1.0 part of C, 1.0 to 5.0 parts of Ni, 0 to 1.0 part of Mo, and 1.0 to 3.0 parts of Cu. Compared with the prior art, the special power metallurgy gear wheel can meet various using performance requirements. The preparation method for the special powder metallurgy gear wheel is easy to operate, and is suitable for automatic production, and high in production efficiency; 4,000 pieces (PCS) of products can be prepared every eight hours, production cost is low, product intensity is high, and the special powder metallurgy gear wheel has high practicability, a good economic prospect, and better social benefits.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and relates to a powder metallurgy gear disc and a preparation method thereof, in particular to a special powder metallurgy gear disc and a preparation method thereof. Background technique [0002] The production method of powder metallurgy gear discs is generally completed by forming, sintering, heat treatment, pressing, etc., but for powder metallurgy gear disc shafts that require high pull-out force, small flange length, and small shaft-to-edge wall thickness (less than 1.5mm) For gear discs, the normal process can no longer meet the production requirements. In many cases, it is necessary to increase the press-fitting amount of the shaft and the hole to increase the pull-out force of the shaft. In this way, there is a risk of cracking in the final shaft area of ​​the product, and other performances of the product also reach Less than usage requirements. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): F16H55/06F16H55/17B22F1/00B22F3/16B22F3/24B22F5/08C22C38/16
Inventor 崔永涛胡云峰官劲松徐同
Owner 扬州保来得科技实业有限公司
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