Centrifugal casting method and device of magnesium alloy hub

Abstract

The invention relates to a centrifugal casting method of a magnesium alloy hub, which belongs to the technical field of casting. The prior gravity and low-pressure casting method for casting the magnesium alloy hub exists the easily occurred casting defects of incompleteness of mould filling, shrinkage cavity, cold shut, hot cracking, shrinkage cracking, and the like. An upper die, a side die and a lower die of a die are matched and then held into a whole, then gravity center casting is carried out for the matched die, the die is enabled to rotate around the axes thereof for a set time and then stop before cast magnesium melt solidifies, the cast mode can be divided into casting before die rotating and casting after die rotating according to the technological requirements of concrete products, and the die is opened to take out a cast after the magnesium alloy melt solidifies. With the method, the magnesium melt in the die can rapidly fill shrinkage towards peripheral parts under the action of centrifugal force to enable cast products to be full and compact, and the method has the advantages of low production rejection rate, compact structure of casts, improvement of quality of workpieces, and the like.

Description

technical field [0001] The invention belongs to the technical field of casting, in particular to a magnesium alloy hub centrifugal casting method and device. Background technique [0002] At present, aluminum alloy wheels are realized by gravity center casting. Gravity casting refers to the method of pouring molten metal into the cavity of the mold to form a casting through crystallization and solidification. This method relies on the action of gravity to make the molten metal fill the cavity of the mold and then crystallize and solidify; center casting is in the precast casting. The central part of the casting (for wheel hub products, generally at the position corresponding to the axis of the hub) is poured; while the gravity center pouring is to combine the characteristics of gravity pouring and center pouring to implement gravity pouring at the center of the pre-cast casting. This casting method The equipment cost is low, the mold manufacturing cycle is short, and the st...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved and the technical task proposed by the present invention are to overcome casting defects such as incomplete mold filling, shrinkage cavity, cold shut, hot crack and shrinkage crack that exist in casting magnesium alloy hubs in existing gravity and low pressure casting methods, and provide A magnesium alloy wheel hub centrifugal casting method and device, for this purpose, the present invention adopts the following technical solutions:

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