Method for controlling aldural stretch forming covering surface quality

A technology of stretch forming and surface quality, which is used in the field of controlling the surface quality of materials in the stretch forming of high-strength aluminum alloy skins. Crystal and other problems, to avoid uneven distribution of internal stress, good plasticity

Inactive Publication Date: 2009-01-14
CHENGDU AIRCRAFT INDUSTRY GROUP
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the contradictory problem that the surface of high-strength aluminum alloy skin parts is often prone to coarse grains due to large deformation, or the accuracy of skin shape is poor due to insufficient stretch deformation, the task of the present invention is to Provide a method that can effectivel

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] The present invention will be further described below in conjunction with the embodiments. According to the present invention, a 7075-"O" state aluminum alloy plate that needs to be stretched is taken, and the wool to be stretched is correctly installed on the stretch forming machine tool and tooling, and the machine tool is adjusted. The curvature of the jaws and the curvature, height and inclination of the stretch forming tooling surface. The correct installation on the stretch forming machine tool and the forming tool refers to adjusting the curvature of the machine tool jaw to the shape of the stretch forming tool during the pre-stretching and final stretch forming process of the high-strength aluminum alloy sheet. The curvature of the surface is basically the same, and the height and inclination of the jaws of the machine tool are also adjusted to match the extension surface of the tooling surface, so that the material is in a uniform plastic stretching deformation ...

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

No PUM Login to view more

Abstract

The present invention relates to a method for controlling the surface quality of the stretching forming coating of high-strength aluminum alloy, and comprises the steps that the stretching formed roughcast is correctly arranged on the stretching forming lathe and the work station; stable and middle stretching forming speed is adopted for the operation; the deformation volume of the pre-stretching forming is controlled within the range of 1 percent to 1.5 percent; the pre-stretching formed roughcast is undertaken the solid-melting processing, and is aged for 20 to 25 hours at the room temperature, and then is performed the second (final) stretching forming. Through the correct installation of the material on the work station and the device, the material stays at the uniform plastic deformation status during the stretching forming process, so that the appearance of the coating is obtained with the minimum extension rate; through the control of the pre-stretching forming deformation volume, the problems such as the large plastic deformation and large material crystal grain are prevented during the solid-melting processing heating process. The problems that the appearance accuracy is poor for large crystal grain appears on the surface or for the less stretching deformation volume are resolved during the stretching forming of the high-strength aluminum alloy coating.

Description

technical field [0001] The present invention relates to a method for controlling the surface quality of high-strength aluminum alloy skin during stretch forming, more specifically, the present invention relates to a method for controlling high-strength 7075-"O" state aluminum alloy sheet during stretch forming Process method to ensure shape accuracy and control material surface quality. The 7075-"O" state aluminum alloy sheet described in the present invention includes, but is not limited to, the 7075-"O" state aluminum alloy sheet, and may also be a high-strength aluminum alloy sheet in the LC4-"M" state. Background technique [0002] The commonly used high-strength aluminum alloy sheet material in the prior art has a certain relationship between the recrystallized grain size and the degree of deformation under a certain temperature condition. High-strength aluminum alloys generally do not recrystallize when the degree of deformation is small, and the grains remain in thei...

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
IPC IPC(8): B21D22/20C22F1/04
Inventor 伍惠董锦亮邵洋
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap