| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for accurately press-forming small metal part having a complicated shape which is provided with shaft parts and spring pegs. SOLUTION: The metal parts 1 are roughly blanked by forming U-shaped slit 21 and rectangular slits 22a-22c on the base stock 10 of a metallic sheet (P1-P7). The main body part 2 is press-formed in a roughly blanked portion 31 in which the metal parts are formed (P8, P9). Next, the spring pegs 7, 8 are press-formed on the spring beg parts 37, 38 on both ends of the portion 31 in which the metal parts are formed by repeating trimming and pressing (P10-P18) and, after that, the shaft parts 5, 6 are formed by pressing the shaft part forming portions 35, 36 into a circular cross section (P19-P22). Again, after pressing and forming the shaft parts 5, 6 and the spring pegs 7, 8, the metal parts 1 are obtained by cutting off the portion 31 in which the metal parts are formed from the base stock 10 of the metal sheet. COPYRIGHT: (C)2008,JPO&INPIT
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