Ultrasonic coaxial assisted dual-shaft-shoulder friction stir welding method

A friction stir welding and friction stir technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of affecting the strength of joints, large heat affected zone of the weld, and reducing the service life of the stirring head. The effect of utilization
CN110681979AInactive Publication Date: 2020-01-14JIANGSU UNIV OF TECH
8 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU UNIV OF TECH
Publication Date
2020-01-14
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of welding, and particularly relates to an ultrasonic coaxial assisted dual-shaft-shoulder friction stir welding method. The ultrasonic coaxial assisted dual-shaft-shoulder friction stir welding method comprises the following steps: (1) placing a to-be-welded workpiece on a welding platform in a butt-joint form, and clamping and fixing a workpiece; (2)regulating a stirring needle of a dual-shaft-shoulder friction stir welding head to align to the butt-joint position of the workpiece, regulating an ultrasonic tool bit and a lower shaft shoulder to be on coaxial positions, and enabling the ultrasonic tool bit and the lower shaft shoulder to be in a pressing state in a welding process; (3) firstly starting the dual-shaft-shoulder friction stir welding head, then, starting the ultrasonic generator, and enabling the dual-shaft-shoulder friction stir welding head and the ultrasonic generator to synchronously move relative to the workpiece to forma friction stir welding seam to realize welding while the stirring needle and the ultrasonic tool bit are in a stable coupling state. A way of applying coaxial ultrasonic vibrations to the bottom ofthe lower shaft shoulder of the dual-shaft-shoulder friction stir welding head is adopted, so that the method increases an ultrasonic energy utilization rate and guarantees quality of a welded joint.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of welding, and in particular relates to an ultrasonic coaxial auxiliary double-shoulder friction stir welding method. Background technique

[0002] Friction stir welding (FSW) belongs to a solid phase joining method, which can obtain higher quality welded joints than conventional fusion welding methods, and is especially suitable for structural manufacturing fields such as aluminum alloys and magnesium alloys. Since the method was invented by the British Welding Institute in 1991, it has been widely used in rail transportation, aerospace, shipbuilding and other fields. However, in the traditional friction stir welding process, a large pressure is often applied, so the back of the workpiece usually needs to be rigidly supported, which will bring problems such as difficulty in clamping and high cost of fixtures. At this time, the double-shoulder friction stir welding technology came into being as a new type ...

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