Importance

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Abstract

In a method of manufacturing link rod which integrally joins bushes to each end of pipe-shaped arm portion, an extrusion molded bracket material (14) is formed to have the length allowing N pieces of the arm portions to be arranged in a horizontal row. Engaging projections (7) provided on the bracket material (14) are engaged with ends of the arm portions (2). Then, the ends of the arm portions (2) are butted against mounting walls (15a) provided on a mounting projection (15) of the bracket material 14. N pieces of the arm portions (2) are arranged without clearance in a horizontal row with respect to the bracket material (14) to form butted portions in the shape of a continuous straight line. The friction stir welding is carried out along the butted portions. Then, the bracket material (14) is cut into the width of the bracket (4). The engaging projections (7) are formed by forming slits (18) at given intervals on a horizontal projection (17) extrusion molded integrally with the bracket material (14).

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First Claim