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Method for quickly cold die-casting aluminium alloy shell

An aluminum alloy and shell technology, applied in the field of casting, can solve the problems of high production efficiency, product deformation surface defects, coarse grains, etc., and achieve the effects of improving accuracy and qualification rate, saving manpower and time, and stabilizing the filling process.

Pending Publication Date: 2012-10-03
TAICANG HAIJIA VEHICLE FITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Currently, the production of such long-length products (product length 570mm, diameter 40mm, wall thickness 3-5mm) and thin wall thickness is mainly based on gravity casting or die-casting, and the control is single in the process of implementation.
Disadvantages of gravity casting: 1. It is difficult to feed the product, and it is easy to form loose or shrinkage defects, resulting in a low product qualification rate; 2. The weight of the product is much larger than that under the die-casting process, resulting in waste of raw materials; 3. The production cycle is slow and cannot meet the production capacity Require
The current disadvantages of die-casting production: 1. High production efficiency leads to poor control of the smelting process, there is no refining process of molten aluminum, and the coarse grains lead to substandard mechanical properties of the product; 2. There are too many human factors in process control and insufficient automation, resulting in product deformation and More surface defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: A quick-cooling die-casting method for an aluminum alloy shell includes the following steps:

[0022] (1) Select the material of the large camshaft cover, according to the percentage by weight: 8.0% for silicon Si, 0.05% for magnesium Mg, 0.1% for iron Fe, 2.0% for copper Cu, 0.1% for manganese Mn, and 0.1% for nickel Ni 0.2%, zinc Zn is 1%, lead Pb is 0.15%, tin Sn is 0.05%, titanium Ti is 0.2%, chromium Cr is 0.05%, and the rest is aluminum Al%.

[0023] (2) Heat the melting furnace to 600°C, add the materials described in (1) into the furnace, and continue heating. When the temperature of the materials rises to 720°C, add Huayu powdered non-toxic refining agent with an amount of 0.1% of the materials Refining;

[0024] (3) Use a bell jar to press the refining agent into the middle of the material liquid and perform circular stirring for 5 minutes, use argon gas with a purity of 99.99% for degassing operation for 3 minutes, obtain the material liquid af...

Embodiment 2

[0029] Embodiment 2: A quick-cooling die-casting method for an aluminum alloy shell includes the following steps:

[0030] (1) Select the material of the large camshaft cover, and the percentages by weight are: 11.0% for silicon Si, 0.55% for magnesium Mg, 1.3% for iron Fe, 4.0% for copper Cu, 0.55% for manganese Mn, and 0.55% for nickel Ni 0.55%, zinc Zn is 1.2%, lead Pb is 0.35%, tin Sn is 0.25%, titanium Ti is 0.25%, chromium Cr is 0.15%, and the rest is aluminum Al%.

[0031] (2) Heat the melting furnace to 700°C, add the materials described in (1) into the furnace, and continue heating. When the temperature of the materials rises to 730°C, add Huayu powdered non-toxic refining agent with an amount of 0.8% of the materials Refining;

[0032] (3) Use a bell jar to press the refining agent into the middle of the material liquid for 15 minutes of circular stirring, use argon gas with a purity of 99.99% for degassing operation for 20 minutes, obtain the material liquid after ...

Embodiment 3

[0037] Embodiment 3: a casting method of rapid cooling die-casting of an aluminum alloy shell, comprising the following steps:

[0038] (1) Select the material of the large camshaft cover: 9.0% for silicon Si, 0.4% for magnesium Mg, 0.9% for iron Fe, 3.0% for copper Cu, 0.25% for manganese Mn, 0.3% for nickel Ni, and 0.3% for zinc Zn 0.8%, lead Pb is 0.2%, tin Sn is 0.08%; titanium Ti is 0.16%, chromium Cr is 0.09%, and the rest is aluminum Al%;

[0039] (2) Heat the melting furnace to 650°C, add the material described in (1) into the furnace, continue heating, and when the temperature of the material rises to 710°C, add a three-in-one refining agent with an amount of 0.5% of the material for refining;

[0040] (3) Use a bell jar to press the refining agent into the middle of the material liquid for 10 minutes of circular stirring, use argon with a purity of 99.99% for degassing operation for 10-20 minutes, obtain the material liquid after slag removal, and stand still for 10...

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PUM

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Abstract

The invention discloses a method for quickly cold die-casting an aluminium alloy shell, which comprises material selecting, material smelting, material refining, degassing with high purity argon after the refining, automatic spraying within a die and ultra-low speed casting of liquid material. Through a modern simulation mode (mold flow analysis), the development cost is greatly lowered, the product percent of pass is high, the porosity is better than a common technological design, the product filling process is stable, the quality is improved, the service life of the die is also improved to a great extent, moreover, the automation is adopted, the manpower and time are greatly saved, and the precision and yield of the product are improved.

Description

technical field [0001] The invention relates to the field of casting, in particular to a quick-cooling die-casting casting method for an aluminum alloy shell. Background technique [0002] Existing such products with longer length (570mm in length, 40mm in diameter, and 3-5mm in wall thickness) and thinner in wall thickness are mainly produced by gravity casting or die casting, with single control in the process of execution. Disadvantages of gravity casting: 1. It is difficult to feed the product, and it is easy to form loose or shrinkage defects, resulting in a low product qualification rate; 2. The weight of the product is much larger than that under the die-casting process, resulting in waste of raw materials; 3. The production cycle is slow and cannot meet the production capacity Require. The current disadvantages of die-casting production: 1. High production efficiency leads to poor control of the smelting process, there is no refining process of molten aluminum, and ...

Claims

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Application Information

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IPC IPC(8): B22D17/00B22D17/32
Inventor 张晓杜秋峰
Owner TAICANG HAIJIA VEHICLE FITTINGS
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