Metal deforming – With means to drive tool – With means to selectably control movement of tool
Patent
1991-11-20
1993-04-06
Jones, David
Metal deforming
With means to drive tool
With means to selectably control movement of tool
72 7, 72389, 72441, 72452, B21J 732
Patent
active
051992930
ABSTRACT:
The press is of the type including a pair of tool holders mounted in a frame and carrying cooperating tools (die and punch). At least one of the tool holders is motor driven and is movable towards the other tool holder. According to the invention, the press includes a first driver arranged to make one of the tool holders travel a fairly long distance towards the other tool and a second driver, distinct from the first, for making this same tool holder or the other tool holder perform, a subsequent, fairly short working stroke to bend the sheet metal and to effect any coining of the bend. Preferably both of the tool holders are movable, the second driver being arranged to make the respective tool holder complete a fairly short bending stroke, and the press includes a third driver, distinct from the first and second, arranged to make the same tool holder and the other tool holder complete a vertical stroke for coining the bend.
REFERENCES:
patent: 3143007 (1964-08-01), Thompson
patent: 3707866 (1973-01-01), Brauer
patent: 3841140 (1974-10-01), Hryc
patent: 4559807 (1985-12-01), Gango et al.
patent: 4646555 (1987-03-01), Postupack
patent: 4838069 (1989-06-01), Walker et al.
patent: 4924693 (1990-05-01), College et al.
Dreis & Krump Manufacturing Co., "Select-a-Speed", Oct. 29, 1964, Iron Age, p. 104.
Catti Alberto A.
Sartorio Franco
Vergano Stefano
Amada Company Limited
Jones David
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