CN201543966U

CN201543966U - Stirring head for friction stir welding

Info

Publication number: CN201543966U
Application number: CN2008203035623U
Authority: CN
Inventors: 乔凤林; 唐众民; 余书平; 鄢江武; 燕翔; 魏宝华; 徐晓东; 王国忠; 黄天曙; 罗晓梅; 刘礼军; 毛克祥
Original assignee: STATE-RUN HONGYANG MACHINE FACTORY
Current assignee: STATE-RUN HONGYANG MACHINE FACTORY
Priority date: 2008-12-22
Filing date: 2008-12-22
Publication date: 2010-08-11
Anticipated expiration: 2018-12-22

Abstract

A stirring head for friction stir welding relates to a special tool for friction stir welding. At present, when utilizing a single-shaft-shoulder structure stirring needle to weld seams of a friction stir welding lapping structure and a T-shaped joint structure, pressing lines of lapping faces of the welding seams extend towards inner portions of the welding seams. The technical scheme of the utility model includes that a stirring head with double shaft shoulders is selected to weld welding seams of lapping joints and T-shaped joints, and a second shaft shoulder of the stirring head can be used for performing friction stir welding for pressing boundaries, thereby resolving the problem that pressing lines of the lapping joints and the T-shaped joints extend towards the inner portions of the welding seams, increasing seam welding quality and stabilizing seam welding property. Tests prove that the stirring head for friction stir welding effectively resolves the problem that the welding seam pressing lines of lapping structures and T-shaped joint structures extend towards the inner portions of the welding seams, is stable in using effect, can guarantee stable welding seam quality by 100 %, and then is favorable for popularization and application.

Description

The stirring-head of friction stir welding

Technical field

The utility model relates to the specific purpose tool that a kind of friction stir welding uses.

Background technology

Under the certain prerequisite of welding condition, influencing agitating friction welding quality has two big principal elements, and the one, the structure of stirring-head, the 2nd, stir the bracing or strutting arrangement in the welding process of rubbing.For banjo fixing butt jointing, selecting reasonable technological parameter combination for use, effectively stirring-head structure and frock can be welded out qualified weld seam, defectives such as its weld seam inside does not all exist pore, incomplete fusion, lack of penetration, crackle, is mingled with, weak combination.But for lap joint shown in Figure 1 and T junction shown in Figure 2, at present, the stirring-head structure of diagram 3 of using is the Triflut structure, be helicla flute helicitic texture single shaft shoulder stirring-head, owing to have the pressing interface between joint, in the friction stir welding welding process, when adopting Triflut structure stirring-head to weld, the pressing alignment weld seam of its overlap joint and T shape welding seam faying surface is inner to be extended, and causes the weld seam overall performance to descend, and influences product and uses.

The utility model content

At present, when friction stir welding welded lap structure and T shape access node structure weld seam, selected stirring-head structure is the Triflut structure, it is helicla flute helicitic texture mixing needle, when carrying out the weld seam welding, the pressing alignment weld seam of the faying surface of its weld seam is inner to be extended, and causes Weld Performance to reduce, and influences product and uses.

The technical scheme that the utility model provides is that the stirring-head structure is improved, because all there is the pressing interface in the commissure of lap joint and T junction, therefore, select for use the stirring-head of twin shaft shoulder to carry out the weld seam welding of lap joint and T junction, wherein, be positioned at the cross-sectional diameter of the shaft shoulder (second shaft shoulder) cross-sectional diameter of front end less than the rear end shaft shoulder (first shaft shoulder), like this, utilize second shaft shoulder of stirring-head in the friction stir welding welding process, friction welding to be carried out at the pressing interface, thereby the inner extension problem of the pressing alignment weld seam that solves lap joint and T junction improves weldquality, the weld seam stabilizing performance.

The beneficial effect of this patent:

Because in the friction stir welding welding process, its pressing line extends to weld seam inside in the mixing needle rotary course of stirring-head, this patent provides a kind of twin shaft shoulder structure stirring-head, utilize second shaft shoulder on the mixing needle to push down the pressing line, eliminate the inner extension of pressing alignment weld seam through the rotation in the welding process, welding, extend problem thereby solved the pressing line, improved product quality and Weld Performance, guaranteed the stability of product in welding process effectively.

Twin shaft shoulder structure stirring-head is compared with traditional single shaft shoulder structure stirring-head, can effectively eliminate the inner extension of bridging arrangement and T shape access node structure weld seam pressing alignment weld seam, its result of use is stable, can stablize by 100% assurance weldquality, can not occur therefore being beneficial to and applying owing to the inner extension of pressing alignment weld seam causes the product rejection problem.

Description of drawings

Fig. 1 is a bridging arrangement weld seam schematic diagram;

Fig. 2 is a T shape access node structure weld seam schematic diagram;

Fig. 3 is a helicla flute helicitic texture single shaft shoulder stirring-head;

Fig. 4 is twin shaft shoulder structure stirring-head schematic diagram;

Wherein,

1-twin shaft shoulder stirring-head first shaft shoulder;

2-twin shaft shoulder stirring-head second shaft shoulder;

3-twin shaft shoulder stirring-head first mixing needle;

4-twin shaft shoulder stirring-head second mixing needle;

5-stirring-head transition region;

6-stirring-head retained part;

The 9-single shaft shoulder stirring-head shaft shoulder;

10-single shaft shoulder stirring-head mixing needle.

The specific embodiment

The utility model adopts the stirring-head of twin shaft shoulder structure, and during application, first shaft shoulder contacts with product external surfaces and rotates and produces auxiliary frictional heat; The also relative rotation with the stitching surface contact between part of second shaft shoulder produces auxiliary frictional heat.After the application of passing through test piece for welding, stablizing, utilize twin shaft shoulder structure stirring-head to carry out the overlap joint and the welding of T shape access node structure circumferential welded seam of type product by technological requirement, through after the trial production of type product, the discovery welding process is stable, weldquality is reliable, can guarantee effectively that type product friction stir welding 100% is qualified.

In addition; above-mentioned embodiment is the protection domain that the exemplary illustration of this patent is not limited it; those skilled in the art can carry out the change of some unsubstantialities to it; so long as do not exceed the spiritual essence of this patent; all be considered as the replacement that is equal to, therefore all within the protection domain of this patent to this patent.

Claims

1. the stirring-head of a friction stir welding is characterized in that described stirring-head is a twin shaft shoulder structure.

2. the stirring-head of friction stir welding according to claim 1 is characterized in that being positioned at the cross-sectional diameter of the shaft shoulder cross-sectional diameter of front end less than the rear end shaft shoulder.