Agitating friction spot welding device and method for dissimilar metal

A technology of friction stirring and dissimilar metals, applied in metal processing equipment, welding equipment, non-electric welding equipment, etc., can solve the problems of high plastic deformation resistance of welding materials, poor welding performance, and low welding quality of spot welding joints, so as to improve plasticity Flow ability, reduce welding pressure, improve the effect of welding quality

Inactive Publication Date: 2013-04-03
SHANGHAI DIANJI UNIV
View PDF9 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of friction stir spot welding, when the lower plate is made of high-strength high-strength steel, due to the high resistance to plastic deformation of the welding material, a large welding force is requir

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
  • Agitating friction spot welding device and method for dissimilar metal
  • Agitating friction spot welding device and method for dissimilar metal
  • Agitating friction spot welding device and method for dissimilar metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0021] Such as figure 1 As shown, a dissimilar metal friction stir spot welding device of the present invention includes a stirring sleeve 2, a stirring needle 1 in the stirring sleeve 2, a clamping sleeve 3 clamped outside the stirring sleeve 2, and a welding pad 4 , between the clamping sleeve 3 and the welding pad 4 is a welding workpiece, which is characterized in that an annular brush 5 is arranged on the top of the welding pad 4, and a T-shaped through hole is provided in the center of the welding pad 4, and the installation conductive The rod 6 and the conductive rod 6 are flush with the upper surface of the welding pad 4, and the annular brush 5 and the conductive rod 6 are respectively connected to the positive pole and the negative pole of the controllable DC power supply throu...

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 provides an agitating friction spot welding device for dissimilar metal. The device comprises an agitating sleeve, an agitating needle arranged in the agitating sleeve, a clamping sleeve clamped outside the agitating sleeve, and a welding cushion block; a welding workpiece is arranged between the clamping sleeve and the welding cushion pad; an annular electric brush is arranged at the top of the welding cushion block; a T-shaped through hole is formed in the center of the welding cushion block; a conductive rod is arranged in the welding cushion block; the conductive rod is flush with the upper surface of the welding cushion block; and the annular electric brush and the conductive rod are respectively connected with an anode and a cathode of a controllable direct current power supply through a lead. The invention further provides an agitating friction spot welding method for dissimilar metal. The method comprises the following steps of plastically softening metal material, respectively connecting the annular electric brush and the conductive rod with a direct current power supply which has the reversed polarity, so as to conduct a welding loop, and then finishing the welding by adopting a spot welding process. According to the device and the method provided by the invention, as certain welding current is applied to the welding material which is high in lower layer strength during the agitating friction spot welding process of the dissimilar metal, the material is more easily and plastically distorted, the welding pressure is reduced and the welding quality is improved.

Description

technical field [0001] The invention relates to a device for friction stir spot welding of dissimilar metals and a method for performing stir spot welding using the device. Background technique [0002] With the increasingly severe global resource supply and environmental protection, automobile lightweight has attracted more and more people's attention, and has become the main direction of the development of today's automobile industry. The use of light alloys such as aluminum and magnesium and high-strength steel materials is an important measure to achieve lightweight. However, the physical properties of light alloys such as aluminum and magnesium and high-strength steel materials are quite different, and hard and brittle intermetallic compounds are easily formed during welding. Therefore, the joint welding quality is poor when using traditional resistance spot welding methods. [0003] Friction stir spot welding technology is a new type of solid-phase joining technology,...

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): B23K20/12B23K20/26B23K20/22
Inventor 杨洪刚
Owner SHANGHAI DIANJI UNIV
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