An extrusion upsetting die, an extrusion upsetting processing method, and a magnesium alloy center jacket

Abstract

The invention discloses an extruding and upsetting die, an extruding and upsetting processing method and a magnesium alloy central jacket and relates to the technical field of plastic forming. The extruding and upsetting die is suitable for industrial production of large-scale and high-strength-plastic rods. In the extrusion process, the die exerts the effect of two refined crystal grain processesof conventional extrusion and upsetting; and the former is realized by reducing an inside diameter of an inner cavity of the die, and the latter is realized by the upsetting process of changing a diameter of a sample into a required size from a small diameter under the effect of a reverse extrusion force exerted by a prefabricated body placed in advance. The large-scale and high-strength-plasticrods can be prepared with the extruding and upsetting die and are suitable for the rail transit industry, the automobile industry, the exerciser industry, the numerical control machine tool industry and the like. The magnesium alloy central jacket is obtained through processing with the extruding and upsetting processing method. The magnesium alloy central jacket has the characteristics of low density, excellent vibration reduction and noise reduction, high cutting speed, high cutting precision and the like; and meanwhile, with micro-arc oxidation and electrophoresis surface treatment, the service life of the magnesium alloy central jacket can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of plastic forming, and in particular to an extrusion upsetting die, an extrusion upsetting processing method and a magnesium alloy center jacket. Background technique [0002] Fine-grained materials are a class of high-performance materials with both excellent strength and good ductility. People often prepare high-performance bars, profiles, plates, etc. by conventional plastic deformation methods such as extrusion, rolling, and forging. However, due to the limitation of extrusion equipment specifications and the size of high-quality billets to prepare large-scale bars through conventional extrusion processes, the extrusion ratio is relatively small, and the dynamic recrystallization phenomenon that occurs during the extrusion process is insufficient. There are still many elongated coarse deformed grains in the structure, which form a mixed crystal structure with some fine equiaxed grains formed by dynamic...

AI Technical Summary

Problems solved by technology

[0005] Although the extrusion and upsetting devices disclosed in the above invention patents all achieve the effect of upsetting, refine grains and improve performance to a certain extent, there are some common problems: 1) the above-mentioned extrusion and upsetting devices can only be equipped on a hydraulic press. Limited length of material, limited to laboratory use

In order to obtain good results, multiple passes of reciprocating extrusion and heading processes may be required, which makes the entire operation process relatively complicated and time-consuming

3) The above extruding equipment cannot be combined with industrially produced extruders, and is not suitable for industrialized continuous production of large-scale, high-strength plastic bars

[0006] In addition, at present, the jacket of the machining center on the CNC machine tool is usually made of copper alloy, which has high noise and vibration during work, which affects the machining accuracy and seriously restricts the replacement of products and industrial upgrading in this industry.

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