Electromagnetically-driven low-pressure casting forming system

Abstract

The invention discloses an electrically-driven low-pressure casting forming system. The electrically-driven low-pressure casting forming system comprises a heat preserving furnace, a magnetic field system, an electric field system, a temperature control system, a cooling circulating water system and a control system, wherein the electric field system and the magnetic field system define an electrically-driven pump body, and are controlled by the control system; molten aluminum is stored in the heat preserving furnace; a charge hole is formed in the upper part of the heat preserving furnace; aradiation type heating device is arranged on the top of the heat preserving furnace; an opening is formed in the lower part of the heat preserving furnace, and the opening is connected to a bottom chute of the electrically-driven pump body; and an opening is formed in the top of the bottom chute, and the opening is in sealing connection with a riser tube. The electrically-driven low-pressure casting forming system drives molten aluminum forming by replacing compressed air with electromagnetic drive force, is stable in transmission in a casting process, does not generate turbulent flow and gasair entrainment, and is low in gas and slag content in molten aluminum; through the magnetic field effect, the molten aluminum improves structure performance of a casting, and does not need to repeatedly add gas for pressurization; and the molten aluminum in the heat preserving furnace is in a sealing state, oxidation and gas suction tendency is low, mechanical performance of the casting is improved, the production process is stable, and product consistency is good.

Description

technical field [0001] The invention relates to the technical field of low-pressure casting, in particular to an electromagnetically driven low-pressure casting molding system. Background technique [0002] Under the general trend of energy saving and consumption reduction and automobile lightweight, it is necessary to replace the high-density ferrous metal castings with low-density aluminum alloy castings. The traditional cast aluminum alloy parts cannot be replaced because the strength does not meet the requirements. At present, aluminum castings are all Using traditional low-pressure casting technology, compressed air is used as the driving force to drive molten aluminum to complete the casting. During the casting process, compressed air is filled into the holding furnace to compress the molten metal in the holding furnace and drive the molten metal to rise along the riser tube inserted into it. Drive the aluminum liquid to rise to the vicinity of the mold gate, continue ...

AI Technical Summary

Problems solved by technology

[0002] Under the general trend of energy saving and consumption reduction and automobile lightweight, it is necessary to replace the high-density ferrous metal castings with low-density aluminum alloy castings. The traditional cast aluminum alloy parts cannot be replaced because the strength does not meet the requirements. At present, aluminum castings are all Using traditional low-pressure casting technology, compressed air is used as the driving force to drive molten aluminum to complete the casting. During the casting process, compressed air is filled into the holding furnace to compress the molten metal in the holding furnace and drive the molten metal to rise along the riser tube inserted into it. Drive the aluminum liquid to rise to the vicinity of the mold gate, continue to increase the compressed air pressure, drive the aluminum liquid to fill the mold cavity, and form a complete contour of the casting, and then continue to increase the pressure, the aluminum liquid will feed the casting, and the air will be compressed during the whole process Oxygen in the aluminum is easy to react with the aluminum liquid, oxidize the slag, the water vapor of the compressed air is immersed in the aluminum liquid, pinholes and diffuse small pores are produced in the casting, and defects such as pores, pinholes, and slag holes appear in the formed casting. These microscopic Invisible defects are the main factor restricting the performance improvement of aluminum alloy castings, making it impossible to further expand the application to areas with higher strength requirements. The traditional pneumatic low-pressure casting will not only cause a large proportion of waste loss, but also the repeated filling of compressed air It will also cause aluminum burning and slag, increasing the loss of main raw materials and increasing production costs

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