Stirring head for metal semi-solid stirring casting

Abstract

The invention discloses a stirring head for metal semi-solid stirring casting, and relates to a stirring head for casting. The stirring head for metal semi-solid stirring casting is characterized by comprising a step stirring shaft, an upper-layer lower pushing 60-degree blade inclined straight blade stirring paddle and a lower-layer upper pushing 60-degree blade inclined straight blade stirring paddle; upper-layer lower pushing blades are assembled to the step stirring shaft through a thread connecting mode, and are positioned by upper shaft shoulders; lower-layer upper pushing blades are assembled on the step stirring shaft through a thread connecting mode, and are positioned by lower shaft shoulders; the top of a step shaft and the bottom of an extension shaft are connected through a thread; and tooth blades are arranged on the extension shaft. The stirring head is reasonable in arrangement and high in mixing efficiency, achieves a main shaft cooling function, can lower the temperature of the main shaft of a motor, effectively protects the motor, is provided with a feeder and a protective gas channel for convenient and safe feeding, and can reduce the melt surface oxidation probability.

Description

technical field [0001] The invention relates to a casting stirring head, in particular to a stirring head for metal semi-solid stirring casting. Background technique [0002] The stirring casting process is to carry out strong stirring during the solidification process of liquid metal, so that the dendrite network skeleton that is easy to form in ordinary casting is broken to form a dispersed granular structure, thereby making semi-solid molten metal, and then die-casting Into blanks or castings, alloys prepared by stirring casting are generally called non-dendritic alloys. The products produced by this technology have the characteristics of high quality, high performance and high alloying. Compared with ordinary liquid casting, they have many obvious characteristics: the solidification shrinkage of castings is reduced, the castings have high dimensional accuracy, good appearance quality, and reduce mechanical stress. The amount of processing is reduced, and the columnar gr...

AI Technical Summary

Problems solved by technology

Usually, the traditional stirring equipment used in this process is a downward-pressing single paddle stirring rod and a speed-regulating motor, which are assembled and fixed on the support frame. This type of equipment is not conducive to the crushing of semi-solid metal dendrites and the uniform dispersion of the dispersed phase, and due to The motor is directly connected to the stirring rod, which will cause the heat of the melt to be directly transferred to the motor shaft, thereby reducing the life of the motor

When traditional mixing equipment performs semi-solid compound mixing, it is difficult to make the semi-solid metal liquid form a complete and complex flow field, so it is necessary to increase the stirring speed, but the increase of the stirring speed will cause too much air to be brought in, which will cause excessive air bubbles in the casting. Many, forming obvious defects

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