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

Preparation method of friction stir brazing of composite pipe/pipe and composite plate

A friction stir and brazing technology, used in welding equipment, non-electric welding equipment, manufacturing tools, etc., can solve problems such as inability to obtain firm joints, and achieve the effect of suppressing IMC and thermal stress, reducing thermal expansion coefficient, and expanding application fields.

Active Publication Date: 2022-08-09
XI AN JIAOTONG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent contradiction between torsional film removal and heat input, it is impossible to obtain a firm joint without cracking after welding only by optimizing the specification parameters, and a new breakthrough must be sought

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
  • Preparation method of friction stir brazing of composite pipe/pipe and composite plate
  • Preparation method of friction stir brazing of composite pipe/pipe and composite plate
  • Preparation method of friction stir brazing of composite pipe/pipe and composite plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0055] (1) Process design

[0056] Based on the smooth periphery of the square tube base material, it can theoretically form a large area of ​​contact friction with the shoulder of the friction stir welding tool (stirring head), which is expected to generate enough friction heat to melt the brazing filler metal and make the composite tube. Friction Brazing (FSB) Method The process of welding two pre-formed U-shaped claddings (eg, bent from aluminum sheet) to a square base pipe (eg, square steel pipe) to produce a single composite square pipe (eg, , aluminum-clad steel composite square tube).

[0057] The technological process of preparing a composite square tube by friction stir brazing mainly includes material preparation and assembly, and a welding process consisting of friction stir brazing without needles on both sides and friction stir bra...

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
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for friction stir brazing of composite pipes / pipes and composite plates: a square pipe is used as an inner pipe, two groove-shaped preforms are used as a material for forming an outer pipe; The welding of the groove bottom plane / finished square tube plane lap interface is realized by friction stir brazing without needle tool, and the groove wing side plane / finished square tube plane lap interface and groove are simultaneously realized by friction stir brazing with needle tool. Welding the butt interface of the wing / slot wing to obtain a composite square tube by welding the side of the square tube to form a composite plate; a plurality of composite square tubes are welded by friction stir brazing or argon arc welding to obtain a composite tube. The invention utilizes the aluminothermic reaction induced by friction stir to increase the welding temperature of the lap joint interface, so as to ensure the smooth melting of the Si-containing aluminum-based brazing filler metal, and at the same time realize the double mechanism of mechanical and metallurgical film removal, restrain the excessive thickening of the intermetallic compound and restrain the thermal stress. .

Description

technical field [0001] The invention relates to the application of friction stir brazing, in particular to a preparation method of the friction stir brazing of composite pipes / pipes and composite plates. Background technique [0002] Friction stir brazing (Friction Stir Brazing: FSB) technology is to solve the narrow welding width (only the diameter of the stirring needle) and the hook-shaped defects in the interface of the stirring zone (Friction Stir Lap Welding: FSLW). The original surface of the lower plate is easy to extend vertically into the parent material of the upper plate or horizontally into the stirring core area, resulting in the reduction of the effective bearing thickness of the upper plate), the difficulty of vertical mixing in the stirring area, and the wear of key holes and tools. The brazing technology proposed in 2011 (Zhang Guifeng, et al. Friction stir brazing: A novel process for fabricating Al / steel layered composite and for dissimilar joining of Al ...

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): B23K20/12
CPCB23K20/12B23K20/122Y02E30/30
Inventor 张贵锋刘旭杨小辉石盛范蒙
Owner XI AN JIAOTONG 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