One-piece forged type wheels of light alloy having a metal...

Details One-piece forged type wheels of light alloy having a metal... One-piece forged type wheels of light alloy having a metal...

B - Operations, Transporting

60

B

B60B 3/02 (2006.01) B60B 3/06 (2006.01)

Patent

CA 2068999

SUMMARY A one-piece type wheel of light alloy having such a metal flow metallo- graphic structure as having metal flows at least a part of which is continued from the periphery position of the disk part to the outermost diameter position of the outer rim said metal flows moving in a zigzag direction against the contour of the outer rim having a plurality of bending parts and being converged in the outermost diameter periphery part of tile outer rim. This wheel has a high strength and compact metal flows excellent in toughness as well as work- ability. This wheel having the above described metal flow metallographic strcture is produced by the use of a hot forging apparatus comprising an upper die 6 and a lower die 4, said upper die being provided with an electric heater 7 and with a flash 12 and a gutter 13. 1 5 -

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