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Vane type gearbox oil pump rotor and preparation method thereof

A vane type and rotor technology, which is applied in the field of vane type gearbox oil pump rotor and its powder metallurgy preparation, can solve the problems of increased vehicle weight, low efficiency, low material utilization rate, etc.

Inactive Publication Date: 2021-05-18
江苏智造新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: due to the complex shape of the rotor used in the oil pump of the vane gearbox, the dimensional accuracy of the oil drain surface is very high.
The production process is complicated, the material utilization rate is low, the efficiency is low, the cost is high, and the energy consumption is high
Production and handling costs are extremely high; not suitable for mass production, it is difficult to guarantee the stability and consistency of product quality and processing accuracy
Moreover, the product structure is not reasonable, and the service life of the product is short
The weight of the product is heavy, which increases the weight of the vehicle used, and the fuel consumption is high, which cannot meet the requirements of energy saving and emission reduction

Method used

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  • Vane type gearbox oil pump rotor and preparation method thereof
  • Vane type gearbox oil pump rotor and preparation method thereof

Examples

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Effect test

preparation example Construction

[0036] A powder metallurgy preparation method for a blade type gearbox oil pump rotor, comprising the following steps:

[0037] Step 1: Mixing: Design raw material composition and mixing; mix the raw materials evenly according to the above mass percentage.

[0038] Step 2: Warm mold pressing: Put the prepared powder metallurgy raw materials into the forming machine, put the cylindrical heating rod and thermocouple into the female mold, heat the mold to a temperature of 93°C±5°C, and the forming density is ≥7.10g / cm 3 , There is no crack at the junction of each part of the green body.

[0039] The third step: sintering hardening and tempering: sintering adopts a mesh belt type sintering hardening furnace, the sintering temperature is 1120°C, and the 2 :H 2 = Sintering in 90:10 sintering atmosphere for 30~40min, using hydrogen H in an oxygen-free environment 2 as a shielding gas. Specifically described air cooling adopts nitrogen N 2 As a cooling medium, the cooling rate is...

Embodiment 1

[0047] A powder metallurgy preparation method for a vane type transmission oil pump rotor, comprising the following steps:

[0048] (1) Mixing: design raw material composition and mixing; mix the following raw materials evenly by mass percentage: C: 0.59%; Cu: 2.2%; Mo: 1.52%, special lubricant H: 0.4%; the rest is Fe and unavoidable impurities.

[0049] (2) Warm mold compaction: Put the prepared powder metallurgy raw materials into the forming machine, put the cylindrical heating rod and thermocouple into the female mold, heat the mold to a temperature of 93°C±5°C, and the forming density is 7.10g / cm 3 , There is no crack at the junction of each part of the green body.

[0050] (3) Sintering hardening and tempering: Sintering adopts a mesh belt type sintering hardening furnace, the sintering temperature is 1120 ° C, in N 2 :H 2 = Sintering in a 90:10 sintering atmosphere for 40 minutes, using hydrogen as a protective gas in an oxygen-free environment. Specifically, the air ...

Embodiment 2

[0058] A powder metallurgy preparation method for a blade type gearbox oil pump rotor, comprising the following steps:

[0059] (1) Mixing: design raw material composition and mixing; mix the following raw materials evenly by mass percentage: C: 0.72%; Cu: 1.8%; Mo: 1.62%, special lubricant H: 0.5%; the rest is Fe and unavoidable impurities.

[0060] (2) Warm mold compaction: Put the prepared powder metallurgy raw materials into the forming machine, put the cylindrical heating rod and thermocouple into the female mold, heat the mold to a temperature of 93°C±5°C, and form a green body with a density of 7.15g / cm3. There are no cracks at the joints of each part.

[0061] (3) Sintering hardening and tempering: Sintering adopts a mesh belt type sintering hardening furnace, the sintering temperature is 1130 ° C, in N 2 :H 2 = Sintering in a 90:10 sintering atmosphere for 35 minutes, using hydrogen as a protective gas in an oxygen-free environment. Specifically, the air cooling u...

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Abstract

The invention provides a vane type gearbox oil pump rotor. The vane type gearbox oil pump rotor comprises the following components in percentage by mass: 0.59-0.72% of C; 1.8% - 2.2% of Cu; 1.32%-1.62% of Mo; 0.4%-0.5% of a special lubricant H; and the balance of Fe and inevitable impurities. The invention also provides a preparation method of the rotor. The preparation method comprises the following steps of mixing materials; warm mold pressing; carrying out sintering hardening and tempering; grinding double end surfaces; machining blade grooves through groove grinding; carrying out multi-station deburring; performing ultrasonic cleaning; performing demagnetization; and packaging. The vane type gearbox oil pump rotor is high in precision, high in strength, self-lubricating, low in noise, good in product quality consistency, light in weight, low in oil consumption and suitable for energy conservation and emission reduction; according to the preparation method, the material utilization rate and the production efficiency are improved, processing procedures are simplified, the processing cost is reduced, and the preparation method is suitable for mass production.

Description

technical field [0001] The invention mainly relates to the technical field of powder metallurgy auto parts, in particular to a vane type transmission oil pump rotor and a powder metallurgy preparation method thereof. Background technique [0002] The rotor of the vane type transmission oil pump is mainly matched with the spline main shaft, and the self-rotation is realized by the rotation of the spline main shaft, so that the vane that cooperates with itself is subjected to the centrifugal force to be close to the surface of the stator, so that the two adjacent vanes, the surface of the inner ring of the stator and the surface of the rotor The outer surface forms a closed working chamber, and with the rotation of the rotor, the volume of the working chamber changes to complete the suction of oil. Therefore, the rotor plays a very important role in the vane pump. [0003] Since the blades are required to move freely in the rotor slot, the matching gap between the blades and ...

Claims

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Application Information

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IPC IPC(8): C22C38/16C22C38/12B22F1/00B22F3/14B22F3/10B22F3/24F16N13/20
CPCC22C38/16C22C38/12B22F3/14B22F3/1007B22F3/24F16N13/20B22F2998/10B22F2003/145B22F2003/248B22F2003/245B22F2003/247B22F1/10
Inventor 施昌旭夏敏石小荣刘桦时辰
Owner 江苏智造新材有限公司
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