| 摘要 |
PROBLEM TO BE SOLVED: To provide a simply structured forging apparatus that can perform forging on spiral bevel gear teeth with extreme high accuracy and with stability, that has smooth operation in each constituent with deviation hardly caused, and that provides dies with a long life as well as providing desirable applicability for forging of spiral bevel gears with a non-circular center hole. SOLUTION: A die body 11 having a spiral bevel teeth mold is held in a die holder 12 in a manner movable in the axial direction and freely rotatable in the circumferential direction, while a punch body 21 is held freely rotatably in the circumferential direction in the punch holder. Between the rear end of the die body 11 and the inner depth end of the die holder, there are interposed a plurality of compression coil springs 4A evenly in the circumferential direction, wherein the compression coil springs 4A are pressurized through thrust bearings 5A, 5B to the rear end of the die body 11 and the inner depth end of the die holder 12. On the side of the die, there are installed a knock-out pin 6 movable in the axial direction and a forward/backward moving means of the knock-out pin 6. COPYRIGHT: (C)2011,JPO&INPIT
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