Precision casting technology of hard and wear-resistant automotive pump

A precision casting and pump body technology, which is applied in the manufacture of tools, casting molding equipment, casting molds, etc., can solve the problems of mixing mold materials, unsatisfactory hardness and wear resistance, and large differences in quality and performance, so as to prolong the service life , Improve the hardness and wear resistance, the effect of internal quality assurance

Inactive Publication Date: 2018-05-15
TAIZHOU BOSHITE PRECISION CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the pump body cast by the casting process in the prior art generally has the disadvantages of large differences in quality and performance. The hardness and wear resistance often cannot meet the application environment requirements of the pump, and it is easy to mix the mold material during casting, causing the pump Body magazine content increases, thus limiting the manufacture of pump bodies in the field of casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A hard and wear-resistant automobile pump body precision casting process is characterized in that the specific operation steps of the casting process are as follows:

[0026] 1. Production of casting molds

[0027] (1) Use natural silica sand as the molding material to make casting molds. There is an inner mold installation space with a thickness of 1 cm in the mold cavity. The molds are dried in a drying furnace, and the drying is divided into 3 Stage: In the first stage, control the drying temperature at 55°C and maintain it for 10 minutes; in the second stage, raise and control the drying temperature at 165°C and maintain it for 5 minutes; in the third stage, turn off the drying furnace and wait for the mold to slowly and naturally Cool down to normal temperature;

[0028] (2) Take the inner mold manufactured according to the specifications of the pump body. The inner mold is made of ceramic material, and the inner mold made of ceramic material is placed in the cavi...

Embodiment 2

[0043]The difference between this example and Example 1 is that the chemical elements are adjusted so that the content of each chemical element is as follows in terms of mass percentage: C: 5.1%, Sn: 0.17%, Si: 3.5%, Mo: 1.2%, Cu: 2.4% , Cr: 0.8%, Mn: 2.8%, Mg: 0.03%, the content of other elements except Fe is less than 1.5%, and the rest is Fe.

Embodiment 3

[0045] The difference between this embodiment and the second embodiment is that the chemical elements are adjusted so that the content of each chemical element is as follows in terms of mass percentage: C: 4.5%, Sn: 0.17%, Si: 2.9%, Mo: 1.1%, Cu: 3% , Cr: 0.9%, Mn: 2.7%, Mg: 0.035%, the content of other elements except Fe is less than 1.5%, and the rest is Fe.

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PUM

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Abstract

The invention discloses a precision casting technology of a hard and wear-resistant automotive pump. The precision casting technology of the hard and wear-resistant automotive pump comprises the following steps: making a casting mould and casting a pump body, wherein a casting mould is formed by combing a cast mould and an inner mould which are connected by a high-temperature-resistant adhesive, and is filled with mixed quartz sand; the pump body casting step comprises the following steps: (1), selecting a casting raw material; (2), smelting the casting raw material; (3), rapidly casting; (4),annealing, quenching and tempering; (5), roughing, deburring, polishing and performing flaw detection; and (6), performing quality inspection. By the precision casting technology, the problem of lowhardness and wear resistance of a pump body cast by the conventional casting technology is solved, so that the hardness and the wear resistance of the pump body are improved; and in addition, throughoverall reformation of the casting mould, the possibility of impurity introduction in the casting process can be effectively reduced, so that the intrinsic quality of the pump body is also guaranteedand the service life of the pump body is prolonged.

Description

technical field [0001] The invention relates to the field of automobile component production, in particular to a precision casting process for a hard wear-resistant automobile pump body. Background technique [0002] As an important travel tool, with the development of society and the advancement of science and technology, the per capita share of automobiles is increasing day by day, and people pay more and more attention to their performance. Pumps, oil pumps, clutch pumps, etc.) are the most important components of a car, and their quality and performance directly affect the overall performance of the car. [0003] However, the pump body cast by the casting process in the prior art generally has the disadvantages of large differences in quality and performance. The hardness and wear resistance often cannot meet the application environment requirements of the pump, and it is easy to mix the mold material during casting, causing the pump The content of impurities in the bod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/06B22C9/02B22C9/22C21D1/26C21D1/18C21D5/00C21D9/00
CPCC22C37/06B22C9/02B22C9/22C21D1/18C21D1/26C21D5/00C21D9/0068
Inventor 张风祥张绍斌范宝明张晓燕
Owner TAIZHOU BOSHITE PRECISION CASTING CO LTD
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