ROTATION TOOL FOR JOINING INNER CORNER AND JOINING INNER CORNER METHOD USING THE SAME

摘要

The present invention provides an economic rotation tool for joining a pair of metal members which form an inner corner by abutting the pair of metal members (1) each other, and a joining inner corner method using the same. The rotation tool for joining the pair of metal members which form an inner corner (1) by abutting the pair of metal members each other to perform friction stir welding on an inner corner portion formed by abutting a pair of metal members against each other comprising: a stirring pin (3) to be inserted into the inner corner portion; and a base block (2) supporting the stirring pin (3) and to be brought into contact with one and the other of the pair of metal members respectively, wherein the base block (2) includes: a body portion (4) having a taper shape; and a shoulder portion (5) formed detachably at a tip of the body portion, and the body portion (4) and the shoulder portion (5) are penetrated by the stirring pin (3).