Patent ID: 9498812
Filing Date: 2016-11-22
CPC Classification: B21D

Claim Text:
1. A sheet metal forming device comprising: a female die (FD) tool with a FD corner and a male die (MD) tool with a MD corner, said MD tool dimensioned to slide at least partially within said FD tool during forming of a piece of sheet metal; and a MD roller, said MD corner of said MD die tool at least partially formed by said MD roller; an external mechanical force selected from the group consisting of an electric motor mechanically coupled to said MD roller and a gas powered motor mechanically coupled to said MD roller; said MD roller rotating forcibly relative to said MD die tool during forming of the piece of sheet metal by said MD die tool; wherein said external mechanical force is configured to forcibly rotate said MD roller relative to said MD tool after said MD tool stops sliding within said FD tool.