Powder metallurgy helical gear and manufacturing process thereof

A technology of powder metallurgy and helical gears, applied in belts/chains/gears, components with teeth, portable lifting devices, etc., can solve the problems of low efficiency, long cycle and high cost of gear production process, and achieve long service life, The effect of energy saving in production and improvement of friction performance

Inactive Publication Date: 2016-02-10
重庆道宇机电制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above, the object of the present invention is to provide a powder metallurgy helical gear and its manufacturing process, which is used to solve the problems of low efficiency, large consumption, high cost and long period of gear production process in the prior art.

Method used

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  • Powder metallurgy helical gear and manufacturing process thereof
  • Powder metallurgy helical gear and manufacturing process thereof
  • Powder metallurgy helical gear and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The gear provided in this embodiment has a torque of not less than 120N / M when the engine speed is 3600 rpm and the interference fit is ≥0.06mm, which can meet the transmission requirements of the engine gear, and has low wear and long service life. .

[0046] Embodiment two

[0047] Take 606 kg of iron powder, 18 kg of copper powder, 32 kg of nickel powder, 6 kg of graphite, and 5 kg of lubricant, wherein the particle sizes of the above-mentioned powder raw materials are respectively 80 meshes of iron powder, 340 meshes of copper powder, and 300 meshes of nickel powder , 500 meshes of graphite, in addition, the purity of each of the above powder raw materials is above 98%. The gear powder raw material measured according to the above ratio is put into the mixer and mixed for 15 minutes to 45 minutes, and then the mixed raw material is put into the powder molding machine for pressing to obtain an integrally formed gear blank, and then the gear blank is taken out, And p...

Embodiment 2

[0049] The gear provided in this embodiment has a torque of not less than 120 N / M when the engine speed is 3600 rpm and maintains an interference fit of ≥0.06 mm, which can meet the transmission requirements of the engine gear, and has low wear and long service life.

[0050] Embodiment Three

[0051]Take 777 kg of iron powder, 22 kg of copper powder, 24 kg of nickel powder, 5 kg of graphite, and 6 kg of lubricant, wherein the particle sizes of the above-mentioned powder raw materials are respectively 100 meshes of iron powder, 300 meshes of copper powder, and 500 meshes of nickel powder , graphite 300 mesh, in addition, the purity of each of the above-mentioned powder raw materials is above 98%. The gear powder raw material measured according to the above ratio is put into the mixer and mixed for 15 minutes to 45 minutes, and then the mixed raw material is put into the powder molding machine for pressing to obtain an integrally formed gear blank, and then the gear blank is ta...

Embodiment 3

[0053] The gear provided in this embodiment has a torque of not less than 120N / M when the engine speed is 3600 rpm and an interference fit of ≥0.06mm is maintained, and its high-temperature performance is stable, wear is low, and its service life is long, which can meet the requirements of engine gears. transmission requirements.

[0054] Embodiment four

[0055] Take 238 kilograms of iron powder, 4 kilograms of copper powder, 4 kilograms of nickel powder, 2 kilograms of graphite, and 2 kilograms of lubricant, wherein the particle sizes of the above-mentioned powder raw materials are respectively 100 meshes of iron powder, 320 meshes of copper powder, and 400 meshes of nickel powder , graphite 400 mesh, in addition, the purity of each of the above-mentioned powder raw materials is above 98%. The gear powder raw material measured according to the above ratio is put into the mixer and mixed for 15 minutes to 45 minutes, and then the mixed raw material is put into the powder mol...

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Abstract

The invention discloses a powder metallurgy helical gear and a manufacturing process thereof. The gear is made of, by weight, powder raw materials including 0.7-1.0 parts of graphite, 0.5-3.0 parts of copper powder, 1.0-5.0 parts of nickel powder, 0.5-0.8 part of lubricating agents, iron powder and certain inevitable impurities; besides, the manufacturing process of the powder metallurgy helical gear includes the steps of raw material mixing, compressing, sintering, oil immersing and the like. The powder metallurgy helical gear and the manufacturing process thereof have the advantages that with respect to process, compared with a manufacturing process of an existing product, waste of raw materials is reduced, and the whole production energy consumption is saved by 1 / 4; besides, with respect to gear performance, the gear has the good performance that the torsion is over 120 N / M, and the hardness HRB is larger than 70, and the gear can well meet the requirement of a power device.

Description

technical field [0001] The invention relates to the field of gear manufacturing technology and technology, in particular to a timing gear for general power machinery and its preparation technology. Background technique [0002] As a kind of mechanical parts commonly used in the mechanical field, the performance of gears will determine the safety and stability of the equipment in which they are installed. Especially in general power machinery, the performance of gears will determine the safety performance and safety of vehicles. stability etc. [0003] In the existing manufacturing process of helical gears, different gears have different manufacturing processes, even gears with the same channel have different manufacturing processes. Among them, the existing manufacturing processes of gears used in general power machinery mainly use Steel bar-forging-cutting-rough machining-hobbing-finishing-shaving and other processes, the production efficiency of each process in the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/16B22F5/08C22C38/16F16H55/06F16H55/17
Inventor 王平
Owner 重庆道宇机电制造有限公司
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