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A Differential Extrusion Die for Magnesium Alloy High Performance Cup

A technology of extrusion forming and cup-shaped parts, applied in the direction of metal extrusion dies, metal extrusion mandrels, etc.

Active Publication Date: 2018-09-18
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From this point of view, there are certain technical limitations in the patent "Mold and Method for Angular Extrusion Forming of Annular Channel of Magnesium Alloy Cup-Shaped Components"

Method used

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  • A Differential Extrusion Die for Magnesium Alloy High Performance Cup
  • A Differential Extrusion Die for Magnesium Alloy High Performance Cup
  • A Differential Extrusion Die for Magnesium Alloy High Performance Cup

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] Take the preparation of an AZ31 magnesium alloy cup with an outer diameter of 200 mm and an inner diameter of 170 mm as a specific example.

[0056] The blank size used is H=360mm, diameter D 1 =80mm, "T" shape upper die 4 cavity diameter D 2 = 90mm, D 1 2 . The whole mold is preheated to 400°C for 2 hours, and the magnesium alloy billet is heated to the forming temperature of 350°C and held for 2 to 4 hours. The extrusion speed of the punch is 1 mm / s.

[0057] Such as Figure 3-1 As shown, 4 to 8 vertical holes are provided on the upper end of the "T" shaped upper die 4 along the axial equidiameter as the small holes for feeding lubricant.

[0058] Such as Figure 3-2 As shown, the length L2 of the sizing belt of the "T"-shaped upper die 4 is 8.8mm, and the length L1 of the sizing belt of the "U"-shaped lower die 5 is 24mm; Considering the pressure angle, the connection surface between the sizing belt at the lower end of the "T"-shaped upper die 4 and the horizo...

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Abstract

The invention discloses a differential extrusion forming die of a high-performance magnesium alloy cup-shaped part and relates to the technical field of metal plastic machining processes and forming. A combined type female die comprising a T-shaped upper female die body and a U-shaped lower female die body is adopted. A cylindrical cavity is formed inside the T-shaped upper concave die body mounted on the U-shaped lower concave die body, and the cross section of a formed revolution body cavity is shaped like the Chinese character 'shan'. Staggered ladder type differential extrusion steps are arranged at the bottom of the extrusion cavity shaped like the Chinese character 'shan'. The magnesium alloy cup-shaped part is extruded through the extrusion cavity shaped like the Chinese character 'shan' and the staggered ladder type differential extrusion steps at the bottom of the cavity, so that the forming capacity of a magnesium alloy material is improved greatly, a high compact structure and large plastic deformation are obtained, the grain refining effect is significant, the effect of removing grain dual modality distribution of the cylinder wall of the cup-shaped part is obvious, and the manufacturing process of the high-performance magnesium alloy cup-shaped part is accelerated.

Description

technical field [0001] The invention relates to the technical field of metal plastic processing and forming, in particular to a differential extrusion forming die used for extrusion forming and modification of magnesium alloy materials. Background technique [0002] Cup-shaped components are one of the most representative structural forms in the fields of aerospace, national defense, transportation, etc., and are typical parts of reverse extrusion technology. For the manufacture of cup-shaped parts, most of them use reverse extrusion forming technology. Reverse extrusion technology is an advanced less-cutting processing technology, which not only improves the shape and dimensional accuracy of forgings, saves metal materials, but also because of the metal fiber streamline The profiling improves the mechanical properties of this type of parts. It has the characteristics of "high efficiency, high quality, and low energy consumption". It has high use value in technology and econ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C25/08B21C23/18
CPCB21C23/18B21C25/08
Inventor 薛勇吴耀金陈帅帅张治民李国俊张宝红任璐英
Owner ZHONGBEI UNIV
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