Combined die for shearing, bending, compounding and deforming magnesium alloy board

Abstract

The invention discloses a combined die for shearing, bending, compounding and deforming a magnesium alloy board, and belongs to the technical field of magnesium alloy board plastic deformation. The combined die can be used for preparing high-performance deforming magnesium alloy. The die mainly comprises a shearing die body, a bending die body and swallow-tail-shaped keys, wherein the shearing diebody is divided into an upper shearing die body and a lower shearing die body, the bending die is divided into an upper bending die body and a lower bending die body, and all the die bodies are fixedly connected through the swallow-tail-shaped keys. The advantages of large shearing deformation and bending deformation are integrated, the flexibility is large, the die utilization rate is high, accumulative stress of composite deformation of shearing and bending under different technological parameters in the single rolling process of boards of different thicknesses can be achieved, therefore superfine and texture control of crystal is achieved, and excellent forming performance, mechanical performance and surface quality are represented.

Description

technical field [0001] The invention belongs to the technical field of plastic deformation of magnesium alloy plates, and in particular relates to a combined mold for shearing, bending and compound deformation of magnesium alloy plates. Background technique [0002] Magnesium alloy is known as "the most promising green engineering material in the 21st century" and has many unique advantages, such as light weight, high specific strength, impact resistance, damping and shock absorption, electromagnetic shielding, and good thermal and electrical conductivity. Aviation, aerospace, automobiles, high-speed rail, and national defense and military fields have broad application prospects, but the plastic deformation of magnesium alloys is limited by their own material properties. The basal surface texture effect of the magnesium alloy sheet obtained by conventional rolling is significant, making subsequent forming difficult, which greatly limits the promotion and application of wroug...

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Problems solved by technology

[0002] Magnesium alloy is known as "the most promising green engineering material in the 21st century" and has many unique advantages, such as light weight, high specific strength, impact resistance, damping and shock absorption, electromagnetic shielding, and good thermal and electrical conductivity. Aviation, aerospace, automobiles, high-speed rail, and national defense and military fields have broad application prospects, but the plastic deformation of magnesium alloys is limited by their own material properties. The basal surface texture effect of the magnesium alloy sheet obtained by conventional rolling is significant, making subsequent forming difficult, which greatly limits the promotion and application of deformed magnesium alloy materials

[0003] Studies have shown that the magnesium alloy with ultra-fine grain structure produced by the large plastic deformation technology has good subsequent formability. The equal diameter angular rolling process proposed by the Chen Zhenhua research group of Hunan University can continuously process plates with excellent performance. However, due to the ECAR process itself The characteristics of the magnesium alloy sheet (repeated rolling and heat preservation) make it difficult to achieve the coordination of grain refinement and texture control, while bending deformation has outstanding advantages in improving the microstructure and texture orientation of the sheet. On this basis, Chongqing The university research group successively proposed the multi-stage continuous angular shear deformation and rolling-shear-continuous bending deformation process, but because the multi-stage continuous angular shear deformation process is limited to the cumulative superposition of shear strain, the rolling-shear —Although bending deformation is added to the continuous bending deformation process, the mold process parameters are single, and it is difficult to dynamically adjust the mold structure parameters according to the actual working conditions, so as to realize the change of shearing and bending paths. To realize the above functions, it is necessary to The process requires reconfiguration, resulting in low mold utilization

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