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

Friction stir welding method for reversely rotating stirring needle and shaft shoulder

A friction stir, welding method technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the asymmetry of joint performance, reduce the bearing capacity of welded structures, temperature field, joint structure and residual stress distribution asymmetry, etc. problems, to achieve the effect of improving mechanical properties, reducing asymmetry, and reducing torque effects

Inactive Publication Date: 2010-11-24
HARBIN INST OF TECH
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of asymmetric temperature field, joint structure and residual stress distribution in the existing friction stir welding method, the present invention leads to asymmetric joint performance and reduces the bearing capacity of the welded structure, and further proposes a stirring needle and shoulder Counter-rotation friction stir welding method

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
  • Friction stir welding method for reversely rotating stirring needle and shaft shoulder
  • Friction stir welding method for reversely rotating stirring needle and shaft shoulder
  • Friction stir welding method for reversely rotating stirring needle and shaft shoulder

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific implementation mode one: as Figure 1~3 As shown, the agitating needle and the shaft shoulder described in this embodiment

[0015] The friction stir welding method with reverse rotation is realized according to the following steps:

[0016] Step 1. Set the first workpiece 4 to be welded and the second workpiece 5 to be welded butt-connected and both are located on the same horizontal plane (that is, the first workpiece to be welded 4 and the second workpiece to be welded 5 are paired), and clamped on the On the workbench; the first workpiece to be welded 4 and the second workpiece to be welded 5 are plates;

[0017] Step 2, the stirring needle 1 of the stirring head 3 is rotated at a speed of 100 to 3000 rpm Plunge into the part to be welded (that is, the butt surface of the first workpiece to be welded 4 and the second workpiece to be welded 5); the rotation direction of the shaft shoulder 2 of the stirring head 3 is opposite to that of the stirring needle...

specific Embodiment approach 2

[0020] Specific embodiment two: In step two of this embodiment, the rotation speed of the stirring needle 1 It is 200~2500 rpm. The rotation speed of the shoulder can be selected according to the specific conditions of the first welded workpiece 4 and the second welded workpiece 5 , in order to reduce the resistance of the mixing head and the forward movement. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment three: In step two of this embodiment, the piercing speed of the stirring head 3 is 2-4 mm / min. The penetration speed of the stirring head 3 can be selected according to the specific conditions of the first workpiece 4 and the second workpiece 5 to be welded, so that the stirring head is easy to penetrate into the workpiece to be welded. Other steps are the same as those in Embodiment 1 or 2.

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 invention discloses a friction stir welding method for reversely rotating a stirring needle and a shaft shoulder, relates to a friction stir welding method, and solves the problems that the conventional friction stir welding method has asymmetrical temperature field, joint structure and residual stress distribution so as to cause asymmetrical joint performance and reduce the bearing capacity of the welding structure. A first welded workpiece and a second welded workpiece are butted and clamped on a working table; the stirring needle pricks a part to be welded at the rotating speed of 100 to 3,000 revolutions per minute; the rotating direction of the shaft shoulder of the stirring head is opposite to that of the stirring needle, and the rotating speed of the shaft shoulder of the stirring head is the same as that of the stirring needle; and when reaching the set pricking depth, the stirring head moves along the weld joint direction at a speed of 100 to 5,000 mm per minute. The directions of driving forces of the stirring needle and the shaft shoulder on the flowing welded materials are opposite, the asymmetry of the friction stir welding head structure and performance is reduced, and the mechanical property of the friction stir welding joint is improved.

Description

technical field [0001] The invention relates to a friction stir welding method. Background technique [0002] Friction stir welding is a new type of solid-phase joining technology, which overcomes the problems of welding defects such as cracks and pores in the fusion welding method, and enables some materials that were difficult to weld in the past to achieve high-quality welding, and has become aluminum, magnesium and other materials in one fell swoop. The preferred welding method for its alloys. However, there is a certain difference in the material flow behavior on both sides of the existing friction stir welding stirring head. The linear velocity of the advancing side stirring head relative to the material to be welded is the sum of the rotating linear speed of the stirring head and the welding speed, while the retreating side of the stirring head is relatively The linear velocity of the material to be welded is the difference between the linear velocity of the stirring...

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): B23K20/12B23K20/24
Inventor 刘会杰张超群李金全赵运强张会杰
Owner HARBIN INST OF TECH
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