To suitably adopt a method of manufacturing a press formed body when manufacturing small parts which require high accuracy to an outside shape and outside dimensions, for example, a rotary body in which movement to the axial center is not allowed, especially, a gear or the like having the small outside diameter thereof in the press formed body (half-finished product or in-process product) which is manufactured with a transfer press.
By punching a blank 10 from a band-plate-shaped strip 2, by making the blank 10 after punching push back to a punched hole 11 which is formed on the strip 2 so that only a part of thickness is engaged with the inner peripheral surface of the punched hole 11, a projecting part 3 which projects the blank 10 is formed on one surface of the strip 2, and a recessed part 4 which closes the punched hole 11 with the blank 10 is formed on the opposite surface of the strip 2.
JPH05161926A | 1993-06-29 | |||
JP2003126924A | 2003-05-08 | |||
JPH05161926A | 1993-06-29 |
Mikio Yasuda
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