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Preparation method of aluminum alloy casting with cavity filled with foamed aluminum

A foamed aluminum and aluminum alloy technology, applied in the field of aluminum alloy casting, can solve the problems of large investment, difficulty in mass production, and large pollution, and achieve the effects of improving overall strength, improving production efficiency, and reducing wall thickness

Inactive Publication Date: 2020-06-19
CITIC DICASTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic movement pollutes the environment a lot, which will damage the health of the workers. At the same time, the increasingly stringent environmental protection requirements further lead to an increase in investment in environmental protection equipment.
Although the inorganic movement can effectively reduce the pollution to the environment, there are still great difficulties in the domestic inorganic movement technology from the stable mass production.
The core technology of inorganic movement is in the hands of developed countries in Europe and the United States, and the import of corresponding equipment requires a lot of investment, which will increase the production cost of aluminum alloy cavity castings and make the products lose competitiveness

Method used

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  • Preparation method of aluminum alloy casting with cavity filled with foamed aluminum
  • Preparation method of aluminum alloy casting with cavity filled with foamed aluminum

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preparation example Construction

[0033] The preparation method of aluminum foam filled aluminum alloy cavity casting according to the present invention generally comprises the following steps:

[0034] (1) Preparation and pretreatment of foamed aluminum: process the foamed aluminum into the shape of the core by sawing or machining, preheat to 160-180°C, spray flux, and then heat-preserve and dry at about 200°C , and then spraying, repeated three times, and finally heat the molded aluminum foam to 600-660 ℃ and keep it warm for use;

[0035] (2) Preparation of aluminum alloy liquid: sequentially including melting, refining, composition adjustment, refinement and modification, and slag and hydrogen measurement steps, and finally keep the aluminum alloy liquid at 660-700°C for use;

[0036] (3) Mold preparation: preheat the mold to 260-300°C, spray a layer of paint, put the shaped aluminum foam with flux on the surface into the mold for fixing, and make the mold fit in place;

[0037] (4) Casting molding: After...

Embodiment 1

[0040] A certain type of automobile cab beam: the casting dimensions are 100×70×600mm, the alloy used is A356, the weight is 2.98kg, and the basic wall thickness is 7mm. Among them, the automobile cab beam includes its aluminum alloy cavity casting part and the foam aluminum part filled inside the cavity casting, such as figure 1 As shown, specifically, the beam 11 and the aluminum foam 12 filled in the beam are respectively. The dimensions of the filled aluminum foam are 86×60×600mm, the material is pure aluminum, the weight is 1.51kg, and the equivalent volume density is 0.2~0.5g / mm 3 . Casting process: low pressure casting.

[0041] The specific steps are:

[0042] (1) Preparation and pretreatment of foamed aluminum: process the foamed aluminum into a core shape by sawing and machining, spray a layer of flux on the surface after preheating, heat and keep it warm, and set aside;

[0043] (2) Preparation of aluminum alloy liquid: melting, refining (degassing and slag remo...

Embodiment 2

[0052] A certain type of automobile crash box: the dimensions of the casting are 120×64×200mm, the alloy used is A356, the weight is 1.2kg, and the basic wall thickness is 5mm. Among them, the automobile crash box includes its aluminum alloy cavity casting part, and the foam aluminum part filled inside the cavity casting, such as figure 2 As shown, specifically, the crash box 21 and the foamed aluminum 22 filled in the crash box. The dimensions of the filled aluminum foam are (32, 50, 18) × 54 × 600mm, the material is pure aluminum, the weight is 0.27kg, and the equivalent volume density is 0.2-0.5g / mm 3 . Casting process: low pressure casting.

[0053] The specific steps are:

[0054] (1) Preparation and pretreatment of foamed aluminum: process the foamed aluminum into a core shape by sawing and machining, spray a layer of flux on the surface after preheating, heat and keep it warm, and set aside;

[0055] (2) Preparation of aluminum alloy liquid: melting, refining (dega...

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Abstract

The invention discloses a preparation method of an aluminum alloy casting with cavity filled with foamed aluminum. The preparation method comprises the following steps of providing formed foamed aluminum with soldering flux on the surface; fixing the formed foamed aluminum with the soldering flux on the surface in a mold; and casting through using a molten aluminum alloy. According to the preparation method of the foamed aluminum filled aluminum alloy cavity casting, the foamed aluminum is used for replacing a traditional sand core, so that higher strength is obtained while lightweight requirements are met, procedures of sand vibrating, shakeout, sand blowing, sand recovering and the like are further omitted, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of aluminum alloy casting, and in particular relates to a method for preparing an aluminum alloy cavity casting filled with foamed aluminum. Background technique [0002] Since the 21st century, under the background of economic globalization and technological progress, the world's automobile industry, especially my country's automobile industry, has entered a period of rapid development. However, the large scale of automobile production and consumption has brought severe energy security. The situation and the huge pressure of environmental protection determine that the automobile industry must take the road of developing new energy vehicles and realizing the lightweight of vehicles. [0003] At present, the more practical automobile lightweight is mainly achieved through three methods, namely, material lightweight, structural lightweight and manufacturing process lightweight. Aluminum alloy materials are widely used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22D18/04C22C1/08
CPCB22D19/0081B22D19/16B22D18/04C22C1/08C22C1/083
Inventor 韩星刘海峰孙宇李鑫磊
Owner CITIC DICASTAL
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