Precision molding device and molding technology for magnesium alloy automobile hub

Abstract

The invention relates / belongs to the technical field of precision molding devices, in particular to a precision molding device and molding technology for a magnesium alloy automobile hub, and solves the problems of shrinkage porosity, shrinkage cavity, cold lap, large grain size, and the like in the casting process of the magnesium alloy automobile hub. The precision molding device comprises an upper mold assembly and a lower mold assembly, and is characterized in that: the upper mold assembly is provided with a push-and-pull oil cylinder perpendicular to the motion direction of a mold; the push-and-pull oil cylinder is connected with an upper mold connected base plate; an upper mold head is fixed on the lower part of the upper mold connected base plate; and the lower mold assembly is provided with a molding area and a demolding area, wherein the molding area comprises a molding slider and a lower mold core; the molding slider is arranged in a barrel-shaped mold bed, and an outer surface of the barrel-shaped mold bed is provided with a barrel-shaped insulating device; an ejector rod mechanism is arranged in the demolding area. The precision molding device and the molding technology for the magnesium alloy automobile hub have the advantages of less allowance for machining, simple process, convenient operation, fine and dense crystal grains of a wheel, high intensity, and excellent rigidity.

Description

technical field [0001] The invention relates to the technical field of precision forming devices, in particular to a precision forming device for a magnesium alloy automobile wheel hub and a process thereof. Background technique [0002] Magnesium alloy is a green and environmentally friendly material in the 21st century. Its weight is 1 / 4 of steel and 64% of aluminum, and its rigidity and strength are relatively good. Compared with other metal materials, magnesium alloy used to make automobile wheels has better impact resistance and vibration absorption Shock absorption and damping performance are superior to other metal materials, and it is the wheel material with the most outstanding lightening effect after steel wheels and aluminum wheels. At present, the automobile industry is facing the constraints of energy and exhaust emissions. Realizing the lightweight of the automobile itself is an important direction for the development of the automobile industry. It is the devel...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a magnesium alloy automobile wheel hub precision forming device and its process in order to solve the problems of shrinkage porosity, shrinkage cavity, cold shut, and coarse crystal grains in the casting process of the existing magnesium alloy wheel hub. The combination of the preforming punch and the forming punch is used to form the hub banner at one time, without subsequent punching and extrusion processing; the barrel-shaped mold bed is designed with positioning guide holes, which is stable and firm; the mold is locked with four inclined sliders, and extrusion The size of the magnesium alloy wheel is close to the net value; the machining allowance is small, the process is simple, the operation is convenient, the grain of the wheel is fine and dense, the strength is high, and the rigidity is good

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