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A kind of hollow piston of automobile air-conditioning compressor and its production method

A technology of hollow piston and automobile air conditioner, which is applied in the direction of mechanical equipment, machine/engine, liquid displacement machinery, etc., can solve the problems that affect the performance and service life of hollow piston, high microporosity, unstable quality, etc., and achieve The effect of increasing the number of crystallization nuclei, improving elongation, and improving strength at room temperature and strength at high temperature

Active Publication Date: 2017-01-04
SHANDONG HUICHUAN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary welding process has low welding tension, low production efficiency and unstable quality. Later, high-speed laser welding process was used, which increased the welding tension, improved the welding mechanical properties, reduced material consumption, improved production efficiency, and stabilized product quality.
However, there are also deficiencies in high-speed laser welding, mainly because there are many micropores and high microporosity, which seriously affects the performance and service life of the hollow piston.

Method used

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  • A kind of hollow piston of automobile air-conditioning compressor and its production method
  • A kind of hollow piston of automobile air-conditioning compressor and its production method
  • A kind of hollow piston of automobile air-conditioning compressor and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Add a certain quality of pure aluminum ingots into the crucible, heat to 780°C, melt the pure aluminum ingots into a melt, and then add Al-Cr master alloy, Al-Cu master alloy, Al -Ni master alloy, Al-Mn master alloy, Al-RE master alloy, Al-Si master alloy, Al-Zn master alloy, Al-Ti master alloy, heat up to 840°C, keep it warm for 6 hours, and wait until the solid alloy is completely melted Stir, turn on the electromagnetic stirrer, stir for 1 hour, and add 0.5% of the composite phosphorus modifier of the melt quality, then cool down to 760°C, add Al-C master alloy and Al-Mg master alloy according to the proportion, and start again Electromagnetic stirrer, stirring for 1 hour, degassing with nitrogen for 20 minutes, after the performance index is reached through the test, the melt is cast into an aluminum alloy ingot. The aluminum alloy ingot includes the following components in weight percentage: Si: 11%, Cu: 3.5%, Mg: 0.2%, Ni: 0.8%, Cr: 0.1%, C: 0.1%, Mn: 0.08%, Zn :...

Embodiment 2

[0090] Add a certain quality of pure aluminum ingots into the crucible, heat to 785°C, melt the pure aluminum ingots into a melt, and then add Al-Cr master alloy, Al-Cu master alloy, Al -Ni master alloy, Al-Mn master alloy, Al-RE master alloy, Al-Si master alloy, Al-Zn master alloy, Al-Ti master alloy, heat up to 845°C, keep warm for 6 hours, after the solid alloy is completely melted Stir, turn on the electromagnetic stirrer, stir for 1 hour, and add a composite phosphorus modifier of 1% of the melt mass, then cool down to 765°C, add Al-C master alloy and Al-Mg master alloy according to the proportion, and start again Electromagnetic stirrer, stirring for 1 hour, degassing with nitrogen for 20 minutes, after the performance index is reached through the test, the melt is cast into an aluminum alloy ingot. The aluminum alloy ingot includes the following components in weight percentage: Si: 12%, Cu: 4.0%, Mg: 0.35%, Ni: 1.1%, Cr: 0.2%, C: 0.2%, Mn: 0.08%, Zn : 0.4%, Ti: 0.14%, ...

Embodiment 3

[0097]Add a certain quality of pure aluminum ingots into the crucible, heat to 790°C, melt the pure aluminum ingots into a melt, and then add Al-Cr master alloy, Al-Cu master alloy, Al -Ni master alloy, Al-Mn master alloy, Al-RE master alloy, Al-Si master alloy, Al-Zn master alloy, Al-Ti master alloy, heat up to 850°C, keep it warm for 6 hours, and wait until the solid alloy is completely melted Stir, turn on the electromagnetic stirrer, stir for 1 hour, and add 2% of the composite phosphorus modifier of the melt quality, then cool down to 770°C, add Al-C master alloy and Al-Mg master alloy according to the proportion, and start again Electromagnetic stirrer, stirring for 1 hour, degassing with nitrogen for 20 minutes, after the performance index is reached through the test, the melt is cast into an aluminum alloy ingot. The aluminum alloy ingot includes the following components in weight percentage: Si: 13%, Cu: 4.5%, Mg: 0.5%, Ni: 1.5%, Cr: 0.3%, C: 0.3%, Mn: 0.08%, Zn : 0....

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Abstract

The invention discloses an automobile air conditioner compressor hollow piston, which comprises aluminum alloy prepared from the following ingredients in percentage by weight: 11 to 13 percent of Si, 3.5 to 4.5 percent of Cu, 0.2 to 0.5 percent of Mg, 0.8 to 1.5 percent of Ni, 0.1 to 0.3 percent of Cr, 0.1 to 0.3 percent of C, 0 to 0.1 percent of Mn, 0 to 0.5 percent of Zn, 0 to 0.15 percent of Ti, 0.1 to 0.3 percent of RE and the balance Al. The invention also provides a production method of the automobile air conditioner compressor hollow piston. Through the selection and the control on elements in the aluminum alloy for the hollow piston, the intensity and the hardness of the piston are improved; through further improvement on the laser welding process, the welding seam fine porosity rate is reduced, the welding tension is enhanced, and the welding quality is improved, so the use performance of the hollow piston is improved, and the service life of the hollow piston is prolonged.

Description

technical field [0001] The invention relates to the technical field of the automobile industry, in particular to a hollow piston of an automobile air-conditioning compressor and a production method thereof. Background technique [0002] With the continuous improvement of people's living standards, the demand for automobiles is increasing, and the requirements for automobile performance are also getting higher and higher, which leads to the rapid development of the domestic automobile industry and the continuous improvement of the localization of auto parts. [0003] The air conditioner compressor is the heart of the air conditioner refrigeration system. Its function is to maintain the circulation of refrigerant in the air conditioner, suck in the low-temperature and low-pressure gaseous refrigerant from the evaporator, compress it into a high-temperature and high-pressure state, and send it to the condenser. Air-conditioning compressors can be divided into different internal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02B23P15/10F04B39/00
Inventor 解居麟魏忠任勇包庆新
Owner SHANDONG HUICHUAN AUTO PARTS
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