| 摘要 |
PROBLEM TO BE SOLVED: To provide a forging apparatus for forming a crankshaft with good yield by changing the allocation amount of compression at an arm part in an upset process and an offset process according to a shape of an integrated type crankshaft. SOLUTION: The forging apparatus for integrated type crankshaft comprises: a pair of gripping dies for gripping a journal part of a partially heated round bar-like material; a hold-down punch for holding down a pin part between the arms of a material, the upper ends of which are connected to a cross head; an inclined board 14 disposed in a sliding table 3 for supporting each of the pair of gripping dies; and an inclined sliding member sliding with respect to the inclined board for axially compressing the two arm parts of the bar-like material, and for driving the pair of gripping dies in an each approaching direction in linkage with the pressurization of the cross head. Respective inclination anglesθof the inclined board 14 and the inclined sliding member are made variable using an inclination angle adjusting means. COPYRIGHT: (C)2008,JPO&INPIT
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