Magnesium alloy thin plate strip blank extruding die

Abstract

The invention discloses a magnesium alloy thin plate strip blank extruding die which comprises a die body, wherein the die body is internally provided with a material storage cavity and an extruding channel communicated with the material storage cavity, the cross section of the extruding channel is rectangular, the two walls of the extruding channel in the thickness direction and two intersection lines of the material storage cavity are mutually staggered along the extruding direction, when the die is in use, extrusion on the upper part of magnesium alloy entering into the extruding channel is inconsistent with the extrusion on the lower part of the magnesium alloy, speed difference is formed, and a shearing force is produced, thus a basal plane is inclined and the texture of the basal plane is weakened, the follow-up processing of a plate strip blank can be convenient, and the stamping property of a plate can be improved. Besides, smooth transition is formed between the material storage cavity and the extruding channel, no dead angle or raw material retention is formed, raw materials can pass smoothly, and cleaning is easy; and meanwhile, the raw materials smoothly enter into the extruding channel by virtue of a transitional channel, and the influence on the flow of the raw materials is less.

Description

technical field [0001] The invention relates to a die, in particular to an extrusion die for magnesium alloy forming. Background technique [0002] Magnesium alloy is currently the lightest metal material in industrial applications. It has the advantages of light weight, high strength, good rigidity, good processing performance, high dimensional stability, impact resistance, wear resistance, good attenuation performance and easy recycling. It can replace Plastic, steel and other materials meet the requirements of lightness, thinness and integration of products, and their applications in many fields have grown rapidly in recent years. [0003] Most magnesium alloys have a close-packed hexagonal structure, so magnesium alloys are considered to be a metal material that is difficult to plastically deform and has poor pressure forming properties. At the same time, most magnesium alloys have good casting properties, so that the current magnesium alloy products are mostly castings...

AI Technical Summary

Problems solved by technology

During the extrusion process, the magnesium alloy grains slide along the extrusion direction. Since the basal plane of the magnesium alloy is the closest-packed plane, the critical shear stress required for sliding is the smallest, resulting in the basal plane 4 of the magnesium alloy grains being squeezed Aligned in the compression direction, forming a very strong basal texture (such as Figure 5 shown), in the subsequent rolling process, this basal texture will be further strengthened, leading to the deterioration of the stamping performance of the produced magnesium alloy sheet

In addition, this kind of flat mold structure is easy to form a dead zone at a, resulting in residual magnesium alloy raw materials in some corners of the storage cavity, which is not easy to clean, and will also cause uneven flow of magnesium alloy during extrusion, reducing the production of magnesium alloy. The quality of the alloy sheet

Especially when extruding magnesium alloy thin slabs with a thickness of 1-1.5mm, the required extrusion force is relatively large, which even leads to the interruption of the extrusion process

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