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Damper compression valve and preparation method thereof

A compression valve and shock absorber technology, applied in shock absorbers, springs/shock absorbers, shock absorbers, etc., can solve the problems of long processing time, poor dimensional stability, waste of raw materials, etc., to reduce production costs, Improve product hardness and improve work efficiency

Active Publication Date: 2013-01-23
宁波拓发汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing time is longer, the cost is higher, the dimensional stability is poor, and the waste of raw materials is more

Method used

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  • Damper compression valve and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment prepares the shock absorber compression valve in the following manner:

[0037] (1) Ingredients

[0038] Select 40 parts by weight of reduced iron powder with an average particle diameter of 100 mesh, 7.5 parts by weight of electrolytic copper powder with an average particle diameter of 250 mesh, 0.5 part by weight of colloidal graphite, 0.35 part by weight of zinc stearate, and 0.25 parts by weight of manganese sulfide, and put them into the cone Fully mixed in the conical powder mixer; then add 40 parts by weight of reduced iron powder with an average particle diameter of 100 mesh into the conical powder mixer again. The mixing time is 30 minutes, to achieve the full mixing effect.

[0039] (2) Repression

[0040] Put the uniformly mixed powder into an automatic molding machine with a pressing tonnage of 50 tons for pressing.

[0041] (3) Sintering

[0042] The sintering step was performed in a mesh belt furnace; the pre-firing temperature was 600°...

Embodiment 2

[0048] (1) Ingredients

[0049] Select 50 parts by weight of reduced iron powder with an average particle diameter of 130 mesh, 10 parts by weight of electrolytic copper powder with an average particle diameter of 200 mesh, 0.2 parts by weight of colloidal graphite, 0.25 parts by weight of paraffin, and 0.25 parts by weight of manganese sulfide, and put them into a conical mixing powder Mix thoroughly in the machine.

[0050] (2) Repression

[0051] Put the uniformly mixed powder into an automatic molding machine with a pressing tonnage of 30 tons.

[0052] (3) Sintering

[0053] The sintering step was performed in a mesh belt furnace; the pre-firing temperature was 700° C., and the pre-firing time was 40 minutes; the sintering temperature was 1450° C., and the sintering time was 3 hours. During the sintering process of the mesh belt furnace, the flow rate of the combustion gas hydrogen is 30 cubic meters, and the flow rate of the protective gas helium is 30 cubic meters. ...

Embodiment 3

[0059] 1) Ingredients

[0060] Select 60 parts by weight of reduced iron powder with an average particle diameter of 100 mesh, 8 parts by weight of electrolytic copper powder with an average particle diameter of 180 mesh, 0.3 parts by weight of colloidal graphite, 0.3 parts by weight of polyvinyl chloride emulsion, and 0.3 parts by weight of manganese sulfide, put Mix thoroughly in a cone mixer.

[0061] (2) Repression

[0062] Put the uniformly mixed powder into an automatic molding machine with a pressing tonnage of 50 tons for pressing.

[0063] (3) Sintering

[0064] The sintering step was performed in a mesh belt furnace; the pre-firing temperature was 650° C., and the pre-firing time was 35 minutes; the sintering temperature was 1500° C., and the sintering time was 4 hours. During the sintering process of the mesh belt furnace, the flow rate of the combustion gas hydrogen is 30 cubic meters, and the flow rate of the protective gas helium is 40 cubic meters.

[0065] ...

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Abstract

The invention provides a damper compression valve, belongs to the field of automobile parts, and is used for solving the problem that the existing damper compression valve is low in density. The damper compression valve provided by the invention comprises the following components in parts by weight: 50-80 parts of reduced iron powder, 7.5-10 parts of electrolytic copper powder, 0.2-0.5 part of colloidal graphite, 0.25-0.35 part of lubricant and 0.25-0.35 part of manganese sulfide. The invention also provides a preparation method of the damper compression valve. Through rationally selecting the ingredients for preparing the damper compression valve and utilizing a powder metallurgy method, the cost is reduced, the density of a product is improved, the size tolerance of the product is lessened, and the hardness of the product is improved. Furthermore, the size tolerance of the product is further lessened through reshaping; and the density of the product is further improved through water atomizing steam treatment, and the density of the damper compression valve can reach up to 7.32-7.5g / cm<3>.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a shock absorber compression valve and a preparation method thereof. Background technique [0002] A shock absorber is usually installed in the automobile suspension system. The shock absorber can reduce the fluctuation when the car is running, and the comfort and safety of the car can be improved through the shock absorption and buffering effect of the shock absorber. The structure of the shock absorber is to insert the piston rod with the piston into the cylinder, which is filled with oil. The piston moves in the cylinder, and the piston rod needs to enter or withdraw from the cylinder continuously with the vibration of the car. The piston is provided with a throttling hole, so that the oil in the two spaces separated by the piston can complement each other. The outlet of the orifice is provided with a compression valve, which changes its opening and closing state according t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C33/04F16F9/34
Inventor 石文光
Owner 宁波拓发汽车零部件有限公司
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