Metal deforming – With means to drive tool – With means to selectably control movement of tool
Patent
1998-07-20
2000-08-29
Jones, David
Metal deforming
With means to drive tool
With means to selectably control movement of tool
72446, 83552, B21D 2820, B21D 2836
Patent
active
061090905
ABSTRACT:
The machine comprises a work surface on which sheet metal rests, a fixed structure which supports the work surface, a work station provided with a hammer movable along a vertical axis to punch the sheet metal, punch units defined by a first holder and a punch tool, and die units defined by a second holder and a die tool. The machine includes a first rotatable table which carries the punch units and which transfers a punch unit to the work station, and a second rotatable table which carries the die units and which transfers a die unit to the work station. It includes a first structure for centering the punch unit with respect to the axis by securing the first holder to the fixed structure and means for centering the die unit with respect to the axis by securing the second holder to the fixed structure, excluding the tables from this securing which are therefore not affected by the mechanical stresses generated during punching, which are transmitted by the centering structure directly to the fixed structure.
REFERENCES:
patent: 4285259 (1981-08-01), Jelinek et al.
patent: 5072620 (1991-12-01), Hill et al.
patent: 5848563 (1998-12-01), Saito
patent: 5934165 (1999-08-01), Chatham
Jones David
Rainer S.r.l.
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