A preparation method of ultra-thin aluminum alloy motor back cover

An aluminum alloy and motor technology, applied in the field of aluminum alloys, can solve the problems that affect the internal structure and mechanical properties of the final product, the formed parts are prone to holes, porosity, segregation, and the viscosity of liquid aluminum liquid is low, so as to eliminate columnar crystals and coarse particles. The effect of dendrites, avoiding excessive grain growth and uniform distribution

Active Publication Date: 2019-11-22
NINGBO JIALILAI MACHINERY MFR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the back cover of the automobile motor is a thin-walled part, the forming of thin-walled parts for aluminum alloys is a difficult point in the die-casting industry. During traditional liquid die-casting, due to the low viscosity of liquid aluminum, the flow rate is relatively high
It is easy to form in a turbulent flow mode, so the formed parts are prone to defects such as holes, looseness, and segregation, which will affect the internal structure and mechanical properties of the final product

Method used

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  • A preparation method of ultra-thin aluminum alloy motor back cover

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Embodiment 1

[0026] The preparation method of the ultra-thin aluminum alloy motor back cover in this embodiment includes the following steps:

[0027] (1) Melting aluminum liquid: prepare raw materials according to the aluminum alloy with the following weight percentage components: 11.0% Si, 0.50% Fe, 0.25% Cu, 0.30% Mn, 0.40% Mg, 0.35% Zn, 0.50% Ti, 0.13% C. The balance is Al; first add Al-Si alloy, then add aluminum ingot and Al-Mn master alloy, heat to 730°C and melt, after the aluminum ingot is partially melted, add Zn, Al-Ti master alloy, graphite After the aluminum ingot is basically melted, cool down to 660°C, add Mg and Cu, and finally add nano-zirconia powder with a weight percentage of 1.2% of the aluminum liquid. The particle size distribution of nano-zirconia is 10-30nm, and stir evenly.

[0028] (2) Die-casting molding: the molten aluminum is sprayed to form aluminum alloy particles with a particle size distribution of 2-6 μm. The temperature of the sprayed aluminum alloy part...

Embodiment 2

[0031] The preparation method of the ultra-thin aluminum alloy motor back cover in this embodiment includes the following steps:

[0032] (1) Melting aluminum liquid: prepare raw materials according to the aluminum alloy with the following weight percentage components: 11.0% Si, 0.50% Fe, 0.25% Cu, 0.30% Mn, 0.40% Mg, 0.35% Zn, 0.50% Ti, 0.13% C. The balance is Al; first add Al-Si alloy, then add aluminum ingot and Al-Mn master alloy, heat to 700°C and melt, after the aluminum ingot is partially melted, add Zn, Al-Ti master alloy, graphite After the aluminum ingot is basically melted, cool down to 650°C, add Mg and Cu, and finally add nano-zirconia powder with a weight percentage of 0.3% of the aluminum liquid. The particle size of the nano-zirconia is 10-30nm, and stir evenly.

[0033] (2) Die-casting molding: the molten aluminum is made into aluminum alloy particles with a particle size of 2-6 μm by spraying. The temperature of the sprayed aluminum alloy particles is 520 ° C...

Embodiment 3

[0036] The preparation method of the ultra-thin aluminum alloy motor back cover in this embodiment includes the following steps:

[0037] (1) Melting aluminum liquid: prepare raw materials according to the aluminum alloy with the following weight percentage components: 11.0% Si, 0.50% Fe, 0.25% Cu, 0.30% Mn, 0.40% Mg, 0.35% Zn, 0.50% Ti, 0.13% C. The balance is Al; first add Al-Si alloy, then add aluminum ingot and Al-Mn master alloy, heat to 750°C and melt, after the aluminum ingot is partially melted, add Zn, Al-Ti master alloy, graphite After the aluminum ingot is basically melted, cool down to 670°C, add Mg and Cu, and finally add nano-zirconia powder with a weight percentage of 2% of the aluminum liquid. The particle size of the nano-zirconia is 10-30nm, and stir evenly.

[0038](2) Die-casting molding: The aluminum alloy particles are made into aluminum alloy particles with a particle size of 2-6 μm by spraying. The temperature of the sprayed aluminum alloy particles is ...

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Abstract

The invention relates to a method for preparing an ultra-thin aluminum alloy motor back cover, which belongs to the technical field of aluminum alloys. The preparation method of the present invention includes the following steps: S1, heating and melting the component raw materials of aluminum alloy into molten aluminum; S2, making the molten aluminum into aluminum alloy particles with a particle size of 2-6 μm by spraying, and injecting the aluminum alloy particles into Put it into the mold for pressure casting to get the finished motor back cover. The preparation method of the invention is not easy to entrain air during die-casting, reduces die-casting defects, improves the internal structure of the casting, and improves the mechanical properties of the product.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys and relates to a method for preparing an ultra-thin aluminum alloy motor back cover. Background technique [0002] The back cover of the automobile motor is a thin-walled part, which is generally made of metal materials. For the motor assembly, the aluminum alloy part is used for the back cover of the motor, which can enhance the strength and heat dissipation effect of the back cover of the motor, reduce the weight of the back cover of the motor, and meet the needs of automobiles. Lightweight requirements, aluminum alloy can be recycled and reused, which can improve resource utilization. However, since the rear cover of the automobile motor is a thin-walled part, the forming of thin-walled parts for aluminum alloys is a difficult point in the die-casting industry. During traditional liquid die-casting, due to the low viscosity of liquid aluminum, the flow rate is relatively high. It is ea...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03C22C1/10B22F9/08B22D17/00C22F1/043
CPCC22C1/1036C22C21/02C22F1/043B22D17/00B22F9/082C22C1/1047
Inventor 金华君顾成锋
Owner NINGBO JIALILAI MACHINERY MFR
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