A friction stir welding tool

CN224543432UActive Publication Date: 2026-07-24AIKEDI (MAANSHAN) NEW ENERGY AUTO PARTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
AIKEDI (MAANSHAN) NEW ENERGY AUTO PARTS CO LTD
Filing Date
2025-08-22
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing friction stir welding, the stirring head is prone to forming hook-shaped and cold lap defects during the welding process, resulting in uneven material flow, which leads to a decrease in the tensile and shear performance of the joint. Furthermore, if the rotation direction is incorrect, it is easy to produce voids and incomplete penetration defects.

Method used

A stirring head is designed with a first external concave thread and a first groove on the side of the stirring pin, and a second external concave thread and a second groove on the side of the shaft shoulder. These structures improve material flowability and heat transfer, and reduce defect formation.

Benefits of technology

It improves the fluidity and mixing degree of materials, reduces or eliminates hook and cold lap defects, enhances the effective lap width and tensile shear strength of joints, and avoids voids and incomplete penetration defects.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224543432U_ABST
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Abstract

The utility model discloses a kind of stir friction welding stirrers, the stir friction welding stirrer includes stir head shaft, the shaft shoulder of being set at the end surface of the stir head shaft, the stir needle of being set at the end surface of the shaft shoulder;The side of the stir needle is formed with first outer concave thread;The side of the stir needle is also formed with first recess;The side of the shaft shoulder is formed with second outer concave thread;The end surface of the shaft shoulder is formed with second recess.The stir head provided in the utility model can effectively increase the heat between the stir head and material during the process of stir friction lap welding, so that the material is more fully melted, the flow of material is promoted, the concentrated area of material at the tip of stir needle is avoided, the hook-shaped structure, cold lap defect is reduced or even eliminated, the width of welding zone can be improved, the width of effective lap is improved, so that the tensile shear strength of joint is improved.
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