Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Rotary Extrusion Die for Light Alloy Cup Parts

A technology of extrusion forming and cup-shaped parts, which is applied in the direction of metal extrusion dies, etc., can solve the problems of easy folding or cracking, poor forming effect, etc., and achieves reduction of performance anisotropy, large plastic strain, and enhanced deformation and strengthening. effective effect

Active Publication Date: 2019-04-09
ZHONGBEI UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the defects and deficiencies of the prior art, and to provide a light alloy cup-shaped rotating extrusion forming die, the purpose of which is to improve the formability of magnesium alloys, obtain large plastic deformation, and improve the comprehensive mechanical properties of formed components. Overcoming the poor forming effect in the traditional rotary extrusion forming process, which is prone to defects such as folding or cracks

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Rotary Extrusion Die for Light Alloy Cup Parts
  • A Rotary Extrusion Die for Light Alloy Cup Parts
  • A Rotary Extrusion Die for Light Alloy Cup Parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] Using a cylindrical solid blank to prepare 7075 aluminum alloy cups with an outer diameter of 200mm and an inner diameter of 170mm is a specific example, and a method of rotary extrusion forming of a light alloy cup with a "fan"-shaped structure boss die surface is introduced in detail .

[0040] The specific process dimensions of the mold components used in the embodiment are as follows: Figure 7 As shown, the diameter D1 of the working belt 13 of the punch 1 is 170mm, the bottom chamfer R1 of the working belt 13 is 10°, the thickness H1 of the working belt 13 is 20mm, and the inclination angle α0 of the “fan-blade”-shaped boss 14 is 30°. The bottom fillet R0 of the “leaf” shaped boss 14 is 5°; Figure 5 , 7 As shown, R4=D1 / 2=85mm, L0=L1 / 2=15mm, R3=55mm; see Figure 8 As shown, the height of the forming cavity 2 is H2=200mm, the draft angle of the inner cavity side wall is 0.5°, the opening angle of the arc surface groove 12 on the side wall is 120°, and the arc surface g...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
Login to View More

Abstract

The invention provides a rotating extrusion forming die for a light alloy cup-shaped piece. The rotating extrusion forming die comprises a plunger chip, a forming female die, a die pad, a lower die plate, a jacking block and a jacking rod. The plunger chip is designed through a symmetrical semicircle displacement fan-shaped structure boss die face, metal flowing during rotating extrusion is facilitated, and therefore a blank is subjected to relatively-large torque, in the pressure-torsion process, the blank is forced to form compression deformation in the height direction and shear deformation in the cross section, the deleterious effect of friction in the extrusion forming is eliminated, and the blank is forced to generate large plastic deformation. The forming female die is an annular revolution body, a plurality of curved grooves which are evenly distributed are formed in the side wall of an inner cavity of the female groove, the situation that different degrees of damage to the surface of the blank is caused when the blank revolves in the pressure-torsion process is prevented, and torsion transmission of the large-height-diameter ratio blank in rotating extrusion forming is facilitated. A certain draft angle is set for the side wall of the inner cavity of the female die, metal flowing in the blank anti-extrusion forming process and taking-out of the cup-shaped piece from the female die after extrusion is completed are facilitated.

Description

Technical field [0001] The invention relates to the technical field of metal plastic processing and forming, in particular to a rotary extrusion forming die for a light alloy cup-shaped piece with a fan-shaped structure boss die surface. Background technique [0002] The cup-shaped component is one of the most representative structural forms in the fields of aerospace, defense and military industry, transportation and other fields, and is a typical part of reverse extrusion technology. Inverse extrusion forgings have precise shape and dimensional accuracy, less cutting allowance, and good comprehensive mechanical properties. They have the characteristics of "high efficiency, high quality, and low energy consumption", and have high technical and economic use value. The cup-shaped component prepared by the traditional back-extrusion forming process requires multiple upsetting and long-drawing to achieve the desired grain refinement strengthening effect, and the production efficienc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21C25/02
CPCB21C25/02
Inventor 薛勇张治民徐健王强赵熹李国俊
Owner ZHONGBEI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com