ROCKER ARM AND METHOD OF PRODUCING THE ARM

摘要

The invention relates to a rocker arm obtained by applying cold forging to a blank in the form of a metal wire, wherein cold forging is applied to a blank obtained by cutting a metal wire into predetermined lengths to provide a second intermediate blank (34b) having a pair of lateral walls (2a) and a base (39) connecting these two lateral walls (2a) at one of their respective widthwise ends. Punching is applied to the base (39) of this second intermediate blank (34b) to form first and second joints. Assuming that inwardly of the second intermediate blank (34b) to have this punching applied thereto, a roller (35) is disposed at a position corresponding to the position at which the roller (35) is disposed in a rocker arm to be obtained, it is arranged that this roller (35) and the base (39) do not interfere with each other. This improves the performance of an engine incorporating this rocker arm.