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Guider of damper and preparation method of guider

A technology of guides and shock absorbers, applied in shock absorbers, springs/shock absorbers, shock absorbers, etc., can solve problems such as increased cost, no improvement in powder metallurgy process, and no solution to air density, etc. The effect of small product dimensional tolerance, narrowing product dimensional tolerance, and increasing product density

Active Publication Date: 2013-02-13
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 existing publication number is CN102335744, which discloses a production process for automobile shock absorber guides, which obtains shock absorber guides through mixing, pressing, sintering, finishing, and bluing. Prepare the shock absorber guide in this way, which can improve work efficiency, but it does not solve the problem of air density
Publication No. CN101386073 discloses a method for manufacturing a powder metallurgy guide, which increases product density by adding reduced iron powder to the formula. This method not only increases the cost of the product but also does not improve the conventional powder metallurgy process.

Method used

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  • Guider of damper and preparation method of guider

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example prepares the shock absorber guide in the following manner:

[0036] (1) Ingredients

[0037] Select 25 parts by weight of reduced iron powder with an average particle size of 100 mesh, 0.5 part by weight of electrolytic copper powder with an average particle size of 250 mesh, 0.2 part by weight of graphite, 0.35 part by weight of zinc stearate, and 0.25 part by weight of manganese sulfide, and put them into the conical Fully mix in the powder mixer; then add 25 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 40 minutes to achieve a full mixing effect.

[0038] (2) Repression

[0039] Put the uniformly mixed powder into an automatic molding machine with a pressing tonnage of 50 tons for pressing.

[0040] (3) Sintering

[0041] The sintering step was performed in a mesh belt furnace; the pre-firing temperature was 750° C., and the pre-firing time was 45 minutes; ...

Embodiment 2

[0047] (1) Ingredients

[0048]Select 40 parts by weight of reduced iron powder with an average particle size of 130 mesh, 0.3 parts by weight of electrolytic copper powder with an average particle size of 200 mesh, 0.3 parts by weight of graphite, 0.3 parts by weight of paraffin, and 0.2 parts by weight of manganese sulfide, and put them into a conical powder mixer Mix thoroughly.

[0049] (2) Repression

[0050] Put the uniformly mixed powder into an automatic molding machine with a pressing tonnage of 30 tons.

[0051] (3) Sintering

[0052] The sintering step was performed in a mesh belt furnace; the pre-firing temperature was 800° C., and the pre-firing time was 30 minutes; the sintering temperature was 1150° 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.

[0053] (4) Steam atomization treat...

Embodiment 3

[0058] 1) Ingredients

[0059] Select 60 parts by weight of reduced iron powder with an average particle diameter of 100 mesh, 0.2 parts by weight of electrolytic copper powder with an average particle diameter of 180 mesh, 0.1 part by weight of graphite, 0.25 parts by weight of polyvinyl chloride emulsion, and 0.15 parts by weight of manganese sulfide, and put them into the cone Mix thoroughly in a mixer.

[0060] (2) Repression

[0061] Put the uniformly mixed powder into an automatic molding machine with a pressing tonnage of 50 tons for pressing.

[0062] (3) Sintering

[0063] The sintering step was performed in a mesh belt furnace; the pre-firing temperature was 800° C., and the pre-firing time was 60 minutes; the sintering temperature was 1100° 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....

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Abstract

The invention provides a guider of a damper, belonging to the field of automobile accessories and solving the problem of low density of the conventional guider of the damper. The guider of the damper comprises the following components in parts by weight: 40-60 parts of reducing iron powder, 0.2-0.5 part of electrolytic copper powder, 0.1-0.3 part of graphite, 0.25-0.35 part of lubricant and 0.15-0.25 part of manganese sulfide. The invention also provides a preparation method of the guider of the damper. By means of rationally selecting ingredients for preparing the guider of the damper and utilizing a powder metallurgy method, the cost can be reduced, the product density can be improved, the dimensional tolerance of a product can be reduced, and the hardness of the product can be improved. Further, the dimensional tolerance of the product is reduced by using shaping, and the product density is further improved through water atomization steam treatment, so that the product density of the guider of the damper can reach 6.3-6.5 g / cm<3>.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a shock absorber guide 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. Shock absorbers convert rigidly connected components into fixed elastic connections. The guide is fitted on the shock absorber, mainly to guide the piston rod slidingly installed in the working cylinder of the shock absorber, to ensure the smoothness of the piston during operation, and to ensure the smoothness of the piston through the guide during the movement of the piston. The oil hole transports excess shock absorber oil to the oil storage cylinder to ensure the communication between the working cylinder and the oil stora...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/16B22F5/00C22C38/16C22C30/02F16F9/36
Inventor 石文光
Owner 宁波拓发汽车零部件有限公司
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