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Combined cooling process for aluminum alloy castings

A technology of aluminum alloy casting and cooling process, applied in the field of aluminum ingot processing technology for remelting, can solve the problems of easy formation of cracks, generation of waste products, etc., and achieve the effect of slowing down the condensation speed

Inactive Publication Date: 2018-05-15
重庆嘉萌鸿业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, a large temperature difference is formed between the middle part of the casting and the outer layer of the casting, which causes stress concentration in the casting, so the casting is easy to form cracks after it is completely cooled, resulting in waste products

Method used

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  • Combined cooling process for aluminum alloy castings
  • Combined cooling process for aluminum alloy castings
  • Combined cooling process for aluminum alloy castings

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Embodiment Construction

[0038] This embodiment provides a combined cooling process for aluminum alloy castings, the structure of which is shown in the figure.

[0039] The combined cooling process of aluminum alloy castings includes:

[0040] S1: Prepare molten aluminum, put the aluminum ingot into the aluminum melting furnace and heat until it turns into molten aluminum. The process is:

[0041] Feeding, put the aluminum ingots in piles and place them in the aluminum melting furnace. The aluminum ingots are stacked layer by layer, and the aluminum ingots on two adjacent layers are arranged crosswise along the length direction. The aluminum ingots on the same layer are parallel to each other, and The distance between two adjacent aluminum ingots on the same layer is not less than one-fifth of the width of the aluminum ingots, and the aluminum ingots are stacked into a boss shape, that is, the geometric area formed by each layer of aluminum ingots becomes smaller along with the height of the aluminum ...

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Abstract

The invention discloses a combined cooling process for aluminum alloy castings, and relates to the technical field of aluminum ingot machining processes for re-melting. The combined cooling process for the aluminum alloy castings comprises the following steps including S1. molten aluminummolten aluminum preparation: placing an aluminum ingot in an aluminum melting furnace and heating to transformthe aluminum ingot into molten aluminumthe molten aluminum; S2. furnace transfer: transferring the molten aluminummolten aluminum into a heat-insulation furnace; S3. heat-insulation temporary storage:a temperature in the heat-insulation furnace is 700-750 DEG C, a pressure in the furnace is 2-3 times of a standard atmospheric pressure, humidity in the furnace is not greater than 75%, and a heat-insulation time is 10 min-20 min; S4. die-casting: injecting the molten aluminum subjected to heat-insulation treatment into a corresponding die through a die-casting machine; S5. cooling: taking off the die and carrying out cooling treatment so as to gradually form the molten aluminum in the die; and S6. burr polishing: opening the die, taking out the castings and polishing burrs on the castings through manual treatment to obtain blanks. According to the scheme, the number of air holes in the blanks can be reduced, and the case of breakage of the blanks is reduced, so that the rejection rate is lowered.

Description

technical field [0001] The invention relates to the field of processing technology of aluminum ingots for remelting, in particular to a combined cooling technology for aluminum alloy castings. Background technique [0002] "Aluminum ingot billet" refers to the process of using aluminum ingot as raw material, making aluminum water through high temperature, and then injecting it into the corresponding mold through a die-casting machine, cooling and forming, and finally obtaining an aluminum alloy blank. [0003] Aluminum water refers to liquid aluminum formed by melting aluminum ingots at high temperatures. [0004] The process is roughly as follows: [0005] Preparation of aluminum water, heat preservation and storage of aluminum water, injection of aluminum water into the mold through a die-casting machine, cooling of the mold, final demoulding and grinding of burrs. [0006] Among them, in the process of cooling the mold, the traditional air cooling method is adopted. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/22C22B21/06C22B9/10
CPCB22D17/2218C22B9/10C22B21/06
Inventor 张贵鸿
Owner 重庆嘉萌鸿业科技有限公司
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