Patent ID: 7832102

Claim:
A method of manufacturing a link rod which comprises an arm portion having a longitudinally extending configuration, and a bracket for mounting a bush being joined to an end in the longitudinal direction of said arm portion, wherein said arm portion has a pair of first and second walls parallel extending to each other and a third wall connecting between said first wall and said second wall, comprising the steps of forming a notch on an end of said third wall in the longitudinal direction thereof, forming an engaging projection on said bush mounting bracket, engaging said engaging projection with said notch to support said first and second walls, butting each of ends in the longitudinal direction of said first and second walls against said bush mounting bracket such that a wall of said bush mounting bracket is butted against each of the ends of said first and second walls so as to form a plane tool traveling surface, and joining said arm portion to said bush mounting bracket by friction stir welding along the butt portion between each of the ends of said first and second walls and said bush mounting bracket.