A kind of manufacturing method of powder metallurgy gear or pulley

A technology of powder metallurgy and manufacturing method, which is applied in the field of powder metallurgy, can solve the problems of gear or pulley rubber failure, bonding strength affecting the use of parts, low strength and temperature resistance, etc., to achieve increased reliability, reasonable structure and process Practical, the effect of improving strength and temperature resistance

Active Publication Date: 2019-10-25
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the strength and temperature resistance of rubber itself are lower than those of metal, the failure of gears or pulleys is likely to be rubber failure. In addition, the bonding strength of metal and rubber will also affect the use of parts

Method used

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  • A kind of manufacturing method of powder metallurgy gear or pulley
  • A kind of manufacturing method of powder metallurgy gear or pulley
  • A kind of manufacturing method of powder metallurgy gear or pulley

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 1 to Figure 8 As shown, the manufacturing method of the powder metallurgy gear in this embodiment includes the following steps:

[0042] 1) The gear includes an outer layer 1, an inner layer 3, and an intermediate layer 2 arranged between the outer layer 1 and the inner layer 3. The composition of the outer layer 1 is copper: 2%, carbon: 0.8%, nickel: 1.0%, molybdenum : 0.5%, chromium: 1.5%, unavoidable impurities not exceeding 2%, iron: the balance; the middle layer 2 is aluminum foam, and the shape is a ring; the composition of the inner layer 3 is: copper: 2%, carbon : 0.3%, unavoidable impurities not exceeding 2%, iron: balance;

[0043] 2) Fully mix the proportioned inner layer 3 powder and outer layer 1 powder respectively in a mixer to obtain the inner layer 3 mixed powder and outer layer 1 mixed powder, and the inner layer 3 mixed powder and outer layer 1 mixed powder Layer 1 mixed powder has no visible agglomeration and segregation;

[0044] ...

Embodiment 2

[0051] The manufacturing method of the powder metallurgy pulley in the present embodiment comprises the following steps:

[0052] 1) The pulley comprises an outer layer 1, an inner layer 3 and an intermediate layer 2 arranged between the outer layer 1 and the inner layer 3, wherein,

[0053]The composition of the outer layer 1 is copper: 1%, carbon: 0.3%, nickel: 1.0%, unavoidable impurities not exceeding 2%, iron: the balance; the middle layer 2 is copper foam, and the shape is a ring; the inner layer The composition of layer 3 is: copper: 2%, carbon: 0.7%, nickel: 2.0%, unavoidable impurities not exceeding 2%, iron: balance;

[0054] 2) Fully mix the powders of the inner layer 3 and the outer layer 1 in a mixer to obtain the mixed powder of the inner layer 3 and the mixed powder of the outer layer 1, and the mixed powder of the inner layer 3 and the outer layer 1 The mixed powder has no visible agglomeration and segregation;

[0055] 3) Pressing: Put the mixed powder of th...

Embodiment 3

[0062] The manufacturing method of the powder metallurgy gear in the present embodiment comprises the following steps:

[0063] 1) The gear includes an outer layer 1, an inner layer 3, and an intermediate layer 2 arranged between the outer layer 1 and the inner layer 3. The composition of the outer layer 1 is copper: 2.0%, carbon: 0.8%, nickel: 2.0%, molybdenum : 1.5%, unavoidable impurities not exceeding 2%, iron: the balance; the middle layer 2 is nickel foam and the shape is circular; the composition of the inner layer 3 is: copper: 1.5%, carbon: 0.5%, no Unavoidable impurities exceeding 2%, iron: balance;

[0064] 2) Fully mix the proportioned inner layer 3 powder and outer layer 1 powder respectively in a mixer to obtain the inner layer 3 mixed powder and outer layer 1 mixed powder, and the inner layer 3 mixed powder and outer layer 1 mixed powder Layer 1 mixed powder has no visible agglomeration and segregation;

[0065] 3) Compression: Put the mixed powder of inner la...

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Abstract

The invention relates to a manufacturing method for a powder metallurgical gear or a powder metallurgical belt wheel. The method comprises the processes of design material composition, pressing and sintering, wherein the gear or the belt wheel is designed to be provided with an inner layer, an outer layer and a middle layer, and a material composition design is carried out on the different layers. Compared with the prior art, the method disclosed by the invention has the following advantages: the middle layer is made from a foam metal alloy, and the foam metal alloy is connected with the inner layer and the outer layer, stress on a stressed part of the outer layer is transferred to the inner layer through foam metal, and vibration is reduced during rotation of the gear or the belt wheel, so that the connection reliability of the inner layer and the outer layer is improved, the purpose of vibration reduction of the gear or the belt wheel is achieved, and the service life of the gear or the belt wheel is prolonged.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a method for manufacturing a powder metallurgy gear or pulley. Background technique [0002] The development trend of the automobile industry is to reduce energy consumption and reduce emissions, especially for traditional fuel vehicles. Therefore, it is particularly important to reduce the displacement of vehicles and improve engine performance. The three-cylinder engine will become the main engine in the industry, but , Due to the unbalanced operation of the three-cylinder engine, the engine itself has large noise and vibration, and the occupant's comfort is poor. In order to reduce the vibration and vibration, it is often necessary to design a balance shaft to offset the imbalance of the cylinder block, so as to give full play to the energy saving of the three-cylinder engine. The advantage of low cost, the single balance shaft can balance the first-order...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/08B22F7/08C22C38/00C22C38/16C22C38/08C22C38/12C22C38/18C22C38/20C22C38/22C22C38/40C22C38/42C22C38/44
CPCB22F5/08B22F7/08C22C38/00C22C38/08C22C38/12C22C38/16C22C38/18C22C38/20C22C38/22C22C38/40C22C38/42C22C38/44
Inventor 包崇玺秦晓冬
Owner NBTM NEW MATERIALS GRP
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