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Extruding casting method for aluminum alloy motor shell

A technology of extrusion casting and motor housing, applied in the field of motor housing casting, can solve the problems of unstable size, low air tightness of parts, small drawing coefficient, etc., and achieve excellent mechanical properties and high dimensional accuracy. , the effect of reducing shrinkage porosity

Inactive Publication Date: 2017-12-15
安徽省含山县潮林铸管厂(普通合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the conventional casting process, shrinkage and shrinkage cavities are prone to occur inside the aluminum alloy motor shell parts, and the airtightness of the parts is low. The motor shell has a small drawing coefficient. The hardening is severe, and the parts cannot be annealed to relieve stress during the forming process, the internal stress is very serious, and the problem of dimensional instability after stress release is quite prominent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A squeeze casting method for an aluminum alloy motor housing, using an indirect squeeze casting process, comprising the following steps:

[0017] (1) Aluminum alloy is selected as the processing material, and the mass percentage of each element composition is: 8.5% silicon, 1.0% iron, 1.5% copper, 0.5% manganese, 0.3% magnesium, 0.5% nickel, zinc 1.0%, tin 0.2%, titanium 0.05%, rhenium 0.03%, and the rest is aluminum;

[0018] (2) After the aluminum and manganese are cleaned and dried, they are added to the electric furnace for smelting. After they are completely melted, they are stirred evenly. After the electric furnace is heated to 750°C, iron, copper, and magnesium are added. After 850°C, the remaining ingredients are added. After all melting, stir slightly, refining time is 15 minutes, after refining and degassing, let stand for 5 minutes to remove slag;

[0019] (3) Use the extrusion rod to quickly push the alloy liquid into the inner gate to remove the gas in th...

Embodiment 2

[0025] A squeeze casting method for an aluminum alloy motor housing, using an indirect squeeze casting process, comprising the following steps:

[0026] (1) Aluminum alloy is selected as the processing material, and the mass percentage of each element composition is: silicon 9.0%, iron 1.2%, copper 2.0%, manganese 0.6%, magnesium 0.4%, nickel 0.8%, zinc 1.1%, tin 0.3%, titanium 0.06%, rhenium 0.04%, and the rest is aluminum;

[0027] (2) After the aluminum and manganese are cleaned and dried, they are added to the electric furnace for smelting. After they are completely melted, they are stirred evenly. After the electric furnace is heated to 750°C, iron, copper, and magnesium are added. After 850°C, the remaining ingredients are added. After it is completely melted, stir slightly, and the refining time is 18 minutes. After refining and degassing, let stand for 8 minutes to remove slag;

[0028] (3) Use the extrusion rod to quickly push the alloy liquid into the inner gate to ...

Embodiment 3

[0034] A squeeze casting method for an aluminum alloy motor housing, using an indirect squeeze casting process, comprising the following steps:

[0035] (1) Aluminum alloy is selected as the processing material, and the mass percentage of each element composition is: 9.5% silicon, 1.5% iron, 2.5% copper, 0.8% manganese, 0.5% magnesium, 1.0% nickel, zinc Accounted for 1.2%, tin accounted for 0.4%, titanium accounted for 0.08%, rhenium accounted for 0.05%, and the rest was aluminum;

[0036] (2) After the aluminum and manganese are cleaned and dried, they are added to the electric furnace for smelting. After they are completely melted, they are stirred evenly. After the electric furnace is heated to 750°C, iron, copper, and magnesium are added, and after 850°C, the remaining ingredients are added. After it is completely melted, stir slightly, and the refining time is 20 minutes. After refining and degassing, let stand for 10 minutes to remove slag;

[0037] (3) Use the extrusio...

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Abstract

The invention relates to the technical field of motor housing casting, and discloses a squeeze casting method for an aluminum alloy motor housing. The indirect squeeze casting process is adopted to achieve the best casting effect by controlling the process conditions. The influence of pouring temperature and mold temperature on the internal and external quality, density, structure, mechanical properties and air tightness of motor casing castings reduces shrinkage porosity, round grain structure, and excellent mechanical properties. The prepared motor casing The body has high dimensional accuracy, no cracks, cold insulation and shrinkage on the surface, the compressive strength is greater than 240MPa, the elongation is greater than 1.0%, and the hardness is greater than 80HBW.

Description

technical field [0001] The invention belongs to the technical field of motor casing casting, and in particular relates to a extrusion casting method of an aluminum alloy motor casing. Background technique [0002] Due to the demand for energy saving and emission reduction, the motor housing is an important part of the motor drive system of new energy vehicles. Its material is replaced by aluminum alloy for cast iron, which not only reduces the weight of the car itself, but also improves the heat dissipation effect of the motor. However, under the conventional casting process, shrinkage and shrinkage cavities are prone to occur inside the aluminum alloy motor shell parts, and the airtightness of the parts is low. The motor shell has a small drawing coefficient. The hardening is severe, and the parts cannot be annealed to relieve stress during the forming process, the internal stress is very serious, and the problem of dimensional instability after stress release is quite prom...

Claims

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Application Information

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IPC IPC(8): B22D18/02C22C21/02C22C1/02
CPCB22D18/02C22C1/026C22C21/02
Inventor 张益涛
Owner 安徽省含山县潮林铸管厂(普通合伙)
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