Mold capable of measuring internal temperature of castings directly in extrusion casting process

Abstract

The invention discloses a mold capable of measuring the internal temperature of castings directly in an extrusion casting process, which comprises an T-shaped upper mold and a concave lower mold matched with the T-shaped upper mold, wherein a movable ejecting rod is arranged in the lower mold; at least one groove is formed in an concave area of the lower mold, a thermocouple fastening boss is arranged in each groove, a thermocouple passes through the thermocouple fastening bosses and forms close fit with the thermocouple fastening bosses, a through hole is formed in the lower mode in a vertical direction, the lead of the thermocouple passes through the through hole and is connected with a data recorder, a casting is formed in the concave area of the lower mold and the thermocouple measures the temperature of the casting and transmits temperature information to the data recorder; and in a demolding process performed at the end of solidification, the casting, the thermocouple and the thermocouple fastening bosses separate from the lower mold with the ejection of the ejecting rod, and in a temperature measurement process of next time of casting, the thermocouple fastening bosses are replaced or reused. The mold avoids leading to difficult demolding due to the arrangement of the thermocouple and can realize continuous multiple times of temperature measurement.

Description

technical field [0001] The invention relates to the technical field of metal casting forming technology and molds, in particular to a mold for directly measuring the internal temperature of a casting in a squeeze casting process. Background technique [0002] Squeeze casting (also known as liquid die forging), is characterized in that the liquid metal is solidified and formed under high external pressure after being filled smoothly, and the obtained castings are dense inside and have excellent mechanical properties. This process is suitable for the production of stressed structural parts with high mechanical performance requirements. At present, squeeze casting has become an important means of producing high-grade non-ferrous metal parts in the automotive, aerospace, aviation and other industrial fields, and has a good development prospect. [0003] The temperature change inside the casting during squeeze casting has an important influence on the structure and properties of...

AI Technical Summary

Problems solved by technology

[0006] Direct processing of temperature measuring holes (1, In-Sung Cho, Chun-Pyo Hong, Modeling of microstructural evolution in squeeze casting of Al-4.5 mass% Cu alloy, ISIJ International, 1997, Vol.37, 1098-1106; 2, D.J. Britnell, K. Neailey, Macrosegregation in thin walled castings produced via the direct squeeze casting process. Journal of Materials Processing Technology, 2003, Vol.138, 306-310; 3. J.H.Lee, H.S.Kim, C.W.Won, B.Cantor, Effect of the gap distance on the cooling behavior and the microstructure of indirect squeeze cast and gravity die cast 5083 wrought Al alloy, Materials Science and Engineering, 2002, Vol.A338, 182-190; 4. Alfred Yu, Shuping Wang, Naiyi Li , Henry Hu, Pressurized solidification of magnesium alloy AM50A, Journal of Materials Processing Technology, 2007, Vol.191, 247-250), to fix the thermocouple with tight fit, after pressurized solidification, the thermocouple is not only solidified in the casting, but also tightly It is fixed in the mold, which makes it difficult to demould the casting and easily damage the mold, which is not conducive to continuous multi-mode temperature measurement

Therefore, the existing methods are difficult to be applied to monitor the temperature inside the casting during the continuous multi-mode monitoring process.

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