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Vehicle steering blade pump stator and preparation method thereof

A pump stator and vane technology, which is applied in the field of automobile steering vane pump stator and its preparation, can solve the problems of slow production efficiency, high cost, and low material utilization rate, so as to improve material utilization rate, increase production efficiency, and ensure mechanical performance Effect

Inactive Publication Date: 2019-06-11
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

[0003] The traditional vane pump stator is made of steel billet through machining process, which requires nearly 20 processes, low material utilization rate, slow production efficiency and high cost
At the same time, the inner surface of the stator produced by traditional billet machining has poor rolling resistance and high noise. When the blade rotates at high speed, the surface of the inner hole of the stator is easily roughened, which affects the performance and service life of the vane pump.

Method used

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  • Vehicle steering blade pump stator and preparation method thereof
  • Vehicle steering blade pump stator and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 with figure 2 As shown, an automobile steering vane pump stator includes a circular stator base 1 with an inner hole, and two mounting holes 2 and two grooves 3 arranged on the axial upper end surface of the stator base 1. The stator The side of the inner hole of the matrix 1 is an arc-shaped convex surface 4; the surface hardness of the stator matrix 1 is ≥ HRC45, the parallelism of the end surface of the stator matrix 1 is equal to 0.005mm, and the perpendicularity between the inner cylinder surface and the end surface of the stator matrix 1 is equal to 0.01mm. The roughness of the inner hole of the base body 1 is Ra0.1-Ra0.4; two positioning pin holes 5 are arranged on both sides of the stator base body 1, and the two positioning pin holes 5 are arranged symmetrically.

[0027] In this embodiment, the mounting holes 2 are used to install and fix the stator base 1; cooperating with the positioning pin holes 5 can further limit the positioning of the...

Embodiment 2

[0029] A method for preparing a stator of an automobile steering vane pump, comprising the following steps:

[0030] (1) Mixing: design raw material composition and mixing, and mix the following raw materials uniformly by mass percentage: C: 0.8%, Cu: 1.0%, Ni: 1.0%, Mo: 1.5%, and the remainder is Fe.

[0031] (2) Forming: Choose a 160-ton CNC forming press, heat the powder at 100°C, and the female mold at 100°C. The density of the green body is evenly divided, and the overall density is 7.2g / cm 3 , After the green body is demolded, the burrs are automatically brushed.

[0032] (3) Sintering: Put the formed green body into a high-temperature mesh belt furnace for sintering treatment, the sintering temperature is 1120°C, the mesh belt speed is 120mm / min, the sintering atmosphere is an ammonia decomposition protective atmosphere, and the sintering hardness of the product is ≥HRB85.

[0033] (4) Finishing: According to the requirements of stator position and profile, molding and...

Embodiment 3

[0040] A method for preparing a stator of an automobile steering vane pump, comprising the following steps:

[0041] (1) Mixing: Design raw material composition and mixing, and mix the following raw materials uniformly according to mass percentage: C: 0.3%, Cu: 1.5%, Ni: 1.2%, Mo: 1.2%, and the rest is Fe.

[0042] (2) Forming: Choose a 160-ton CNC forming press, heat the powder at 100°C, and the female mold at 100°C. The density of the green body is evenly divided, and the overall density is 7.3g / cm 3 , After the green body is demolded, the burrs are automatically brushed.

[0043] (3) Sintering: put the formed green body into a high-temperature mesh belt furnace for sintering treatment, the sintering temperature is 1130°C, the mesh belt speed is 130mm / min, the sintering atmosphere is an ammonia decomposition protective atmosphere, and the sintering hardness of the product is ≥HRB88.

[0044] (4) Finishing: According to the requirements of stator position and profile, moldin...

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Abstract

The invention discloses a vehicle steering blade pump stator and a preparation method thereof. The stator comprises a circular stator base body with an inner hole, two mounting holes and two grooves,wherein the two mounting holes and the two grooves are formed in the axial upper end face of the stator base body, and the side face of the inner hole of the stator base body is an arc-shaped bulged hook face. The preparation method of the vehicle steering blade pump stator comprises the steps: mixing, forming, sintering, finishing, heat treatment, double-end-face grinding, inner hook face milling, vacuum oil immersion and telecentric separation, and inspection and packaging. Original powder metallurgical raw material components and powder metallurgy process are adopted, using requirements ofhigh hardness, abrasion resistance, self-lubrication, low noise and high precision of a product are met in design, the vehicle steering blade pump stator is manufactured, the material utilization rateis increased to 90%-98%, the production efficiency is improved by 70%, under the premise of ensuring mechanical performance, abrasion resistance of the stator is improved, and the service life of a blade pump is prolonged.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy automobile parts, in particular to an automobile steering vane pump stator and a preparation method thereof. Background technique [0002] Vane pump is a kind of steering pump for automobiles. Compared with traditional gear pumps and plunger pumps, it is more energy-saving and noise-reducing. It is currently widely used. The main structure of the vane pump is composed of stator, rotor, blades, side plates, etc. When the vane pump is working, the blades cling to the inner surface of the stator under the action of centrifugal force and root pressure oil to produce a compound motion of sliding and rolling, which requires the stator It requires high hardness, wear resistance and machining accuracy, and also requires high fixing firmness. [0003] The traditional vane pump stator is made of steel billet through machining process, which requires nearly 20 processes, low material utilization r...

Claims

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Application Information

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IPC IPC(8): F04C15/00B23P15/00C22C38/16C22C38/12C22C38/08B22F3/02B22F3/10B22F3/24B22F3/26C23C8/32C21D1/18
Inventor 施昌旭石小荣夏敏
Owner 江苏智造新材有限公司
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