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A device and method for measuring the gas content inside a die casting

A technology of die casting and gas content, applied in the direction of analyzing materials, instruments, etc., can solve problems such as measurement error, and achieve the effect of solving the problem of measurement error, conducive to design and optimization, high measurement accuracy and reliability

Active Publication Date: 2017-09-01
GUANGDONG HONGTU TECHNOLOGY (HOLDINGS) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a device and method for measuring the gas content inside the die casting, which solves the measurement error problem caused by inconsistent temperature and leakage during the measurement process, and has a high measurement accuracy. Precision and reliability to accurately evaluate porosity defects and internal quality in die castings

Method used

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  • A device and method for measuring the gas content inside a die casting
  • A device and method for measuring the gas content inside a die casting
  • A device and method for measuring the gas content inside a die casting

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Effect test

Embodiment 1

[0096] The AlSi10Mg alloy was subjected to ordinary die-casting and vacuum die-casting on a 2800KN horizontal cold chamber die-casting machine, and this device was used to test the gas content of the obtained parts. The comparative test results are shown in Table 1.

[0097] Table 1 AlSi10Mg alloy common die-casting and vacuum die-casting parts gas content (ml / 100g)

[0098]

[0099] It can be seen from Table 1 that the gas content in vacuum die castings is significantly smaller than that of non-vacuum ordinary die castings, which quantitatively verifies that the internal quality of vacuum die castings is better than that of ordinary die castings, providing a reference for process optimization.

Embodiment 2

[0101] Cut each part of the vacuum die casting, and test the air content of the parts, cake and overflow tank respectively. The test results are shown in Table 2.

[0102] Table 2 Air content of each part of the die casting (ml / 100g)

[0103]

[0104] It can be seen from Table 2 that even if vacuum die casting is used, the air content in different parts of the die casting is also different. At the same time, it proves that the air content of the die casting body is smaller than that of the cake, and the air content of the cake part is smaller than that of the overflow tank. . This provides a strong reference for the development and evaluation of structural components.

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Abstract

The invention discloses a device for measuring the gas content inside a die casting, which includes a heating system, a vacuum system and a quantitative gas supply system. The heating system includes a heating furnace and a crucible; the vacuum system includes a vacuum chamber, a first stop valve, a second shut-off valve, oil diffusion pump, first shut-off valve, third shut-off valve, fourth shut-off valve, mechanical pump, and first vacuum gauge; the vacuum chamber is connected with a temperature measuring thermocouple; the first vacuum gauge is connected to the A fifth cut-off valve is also arranged between the first cut-off valves, and the fifth cut-off valve communicates with the outside atmosphere through the first air communication pipe; the quantitative air supply system includes a seventh cut-off valve, a first quantitative pipe, The ninth shut-off valve, the ninth shut-off valve, the second quantitative pipe, and the tenth shut-off valve. The invention can quickly and accurately measure the gas content inside the die casting, and the operation is simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of die casting, and more particularly relates to a device and method for measuring the gas content inside a die casting. Background technique [0002] Die casting forming is to pour the molten alloy liquid into the pressure chamber of the die-casting machine, and then press the metal liquid into the cavity of the metal mold at high speed by the punch, so as to cast parts with a certain shape and size. Since the molten metal fills the mold cavity in a high-speed and high-pressure state during the die-casting process, a large amount of gas in the mold cavity is too late to be discharged and is involved in the turbulent molten metal and becomes a pore defect. In addition, there is also dissolved hydrogen in the molten metal. The hydrogen is precipitated due to the decrease in the solubility of the molten metal due to the decrease in the temperature of the molten metal. If the precipitated hydrogen is not discha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/00
Inventor 徐飞跃张百在余亮汪学阳陈振宇廖仲杰万里
Owner GUANGDONG HONGTU TECHNOLOGY (HOLDINGS) CO LTD
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