Ultrasound-assisted semisolid die-casting molding device and method for complex thin-wall aluminum alloy pieces

Abstract

The invention discloses an ultrasound-assisted semisolid die-casting molding device and method for complex thin-wall aluminum alloy pieces. The ultrasound-assisted semisolid die-casting molding device comprises a die-casting machine, a die-casting die, an ultrasonic vibration system and a cooling system. The die-casting die is mounted on the die-casting machine. A press-jet assembly penetrates through a static die fixing plate and is connected with the die-casting die. The ultrasonic vibration system is connected to a movable die of the die-casting die and directly acts on the movable die for semisolid die-casting molding through ultrasonic assistance. The movable die is provided with the cooling system connected with the ultrasonic vibration system. By adoption of the ultrasound-assisted semisolid die-casting molding device and method, the solid phase agglomeration degree can be effectively lowered, the flowing capacity and mold-filling capacity of semisolid metal are improved, grains can be refined, the density of the castings is improved, the mechanical property and heat conductivity of the aluminum alloy castings are further improved, and a novel molding method is provided for the complex thin-wall aluminum alloy piece casting.

Description

technical field [0001] The invention relates to the field of semi-solid forming of metal materials, in particular to an ultrasonic-assisted semi-solid die-casting forming device and method for complex thin-walled aluminum alloy parts. Background technique [0002] In recent years, with the rapid development of information technology and communication industry, complex thin-walled aluminum alloy castings have a wide demand in the electronic communication industry, such as: mobile phone casings, LED lamp radiators, communication base station casings, etc., such as figure 1 shown. Such parts usually have complex cavity structures and thin-walled features. The wall thickness is usually <4.0mm, and the wall thickness in local areas is <0.5mm. In addition, such aluminum alloy castings are often composed of multiple large planes or curved surfaces, which are difficult to achieve by traditional die-casting or cutting methods. [0003] At present, the common manufacturing pro...

AI Technical Summary

Problems solved by technology

This invention uses the characteristics of segregation and separation of liquid phase and solid phase in semi-solid extrusion forming to prepare and process high-performance thin-walled complex-shaped high-silicon aluminum alloy electronic packaging shells, but the process of this invention is mostly simple shell parts, which is difficult Processing of complex thin-walled aluminum alloy castings with high aspect ratio

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