| 摘要 |
PROBLEM TO BE SOLVED: To prevent a stepped part from being left in the state where the stepped part is generated between the inside of a through hole 23 formed in order to house a roller by punching and the inner side face part 2 of each side wall part 2, further, to increase the the range of selection of the thickness of the metallic sheet which comprises a rocker arm made of the sheet metal and also to stably raise the shape accuracy of the inner side face of each side wall part 2. SOLUTION: A first intermediate base stock having a pair of the side wall parts and a connecting part is made by applying a bending work to a blank having a prescribed external size on the basis of press working. Through holes 23 are formed by applying a punching work to the connecting parts of this first intermediate base stock and, after that, a shaving work is applied to the intermediate part in conformity with the through hole 23 about the length direction on the inner side faces of the pair of the side wall parts 2. COPYRIGHT: (C)2007,JPO&INPIT
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