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

A method for simultaneous friction stir spot welding-brazing-diffusion welding of aluminum and magnesium dissimilar materials

A technology of friction stirring and dissimilar materials, applied in the direction of welding/welding/cutting items, welding equipment, welding equipment, etc., can solve the problems of low strength and difficult to meet the demand, so as to improve the tensile shear force and increase the effective bearing area , the effect of less energy consumption

Active Publication Date: 2018-02-23
NANCHANG HANGKONG UNIVERSITY
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no metallurgical reaction between the chemical glue and the metal substrate, and the combination between them is carried out by physical adsorption. Therefore, the strength is low and it is difficult to meet the demand

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 method for simultaneous friction stir spot welding-brazing-diffusion welding of aluminum and magnesium dissimilar materials
  • A method for simultaneous friction stir spot welding-brazing-diffusion welding of aluminum and magnesium dissimilar materials
  • A method for simultaneous friction stir spot welding-brazing-diffusion welding of aluminum and magnesium dissimilar materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Such as Figure 1-4 Shown, the present invention is implemented in this way, a method for synchronously realizing the "friction stir spot welding-brazing-diffusion welding" composite welding joint of aluminum / magnesium dissimilar materials, which includes a stirring head 1, an upper metal 2, a brazing sheet 3 and the lower metal 4, which are characterized in that: the shoulder of the stirring head 1 presses the upper metal 2 while maintaining high-speed rotation, the stirring needle penetrates the upper metal 2 and directly contacts the lower metal 4, the stirring head 1 and the upper metal 2 The heat generated by mutual friction is conducted to the brazing filler metal 3 through the upper metal 2; the brazing filler metal 3 is pressed against the upper metal 2 and the lower metal 4 at the interface to realize element diffusion and form a diffusion welding seam. The temperature in the nearby area is high, and the brazing filler metal melts to form a brazed joint. At th...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A method for synchronously realizing friction stir spot welding-brazing-diffusion welding of aluminum and magnesium dissimilar materials. Both sides of the blank are respectively in contact with the aluminum plate and the magnesium plate. Friction stir spot welding is performed on the fixed overlapping structure. During the welding process, on the one hand, the friction stir spot welding of the aluminum plate and the magnesium plate is realized through the action of the stirring pin on the stirring head and the plate below; Under the action of heat generated by shaft shoulder friction and forging pressure, the temperature in the area close to the stirring pin is high, the brazing sheet melts, and a brazed connection is formed between the aluminum plate and the magnesium plate; Under the action of heat, atomic diffusion occurs between aluminum plate / solder sheet and magnesium plate / solder sheet to form diffusion welding. The invention can form brazing and diffusion welding joints at the same time of friction stirring spot welding, increase the effective bearing area of ​​solder joints, and improve the tensile shear force of the joints.

Description

technical field [0001] The invention relates to welding of aluminum / magnesium dissimilar materials, in particular to a method for synchronously realizing friction stir spot welding-brazing welding-diffusion welding of aluminum and magnesium dissimilar materials. Background technique [0002] At present, the welding methods commonly used at home and abroad for the spot welding of aluminum / magnesium dissimilar materials mainly include resistance spot welding, laser welding, and friction stir spot welding. Since aluminum / magnesium are relatively active metals, defects such as pores, inclusions, and cracks are likely to occur in the joints when welding by resistance spot welding or laser welding; at the same time, brittle metals are easily formed when the two materials are welded. Intercompound Al 3 Mg 2 and Al 12 Mg 17 , a large amount of intermetallic compounds will make the weld embrittlement, and it is difficult to obtain a spot welded joint with ideal shear performance....

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): B23K31/02B23K20/12B23K20/02B23K1/00B23K20/24
CPCB23K1/00B23K20/023B23K20/12B23K20/24B23K31/02B23K2103/18
Inventor 陈玉华谢吉林曹文明刘东亚
Owner NANCHANG HANGKONG UNIVERSITY
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