Cutting – With product handling means – Including means to form or hold pile of product pieces
Reexamination Certificate
1997-11-05
2001-04-17
Rachuba, M. (Department: 3724)
Cutting
With product handling means
Including means to form or hold pile of product pieces
C083S094000, C083S096000, C083S153000, C083S167000, C083S277000, C083S916000
Reexamination Certificate
active
06216572
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a machine tool for machining sheet metal.
Known machine tools for machining sheet metal comprise a worktable; a punch unit located on the worktable at a work station; a first and second store on either side of the worktable; a first handling device for transferring the sheets from the first store onto the worktable; and a second handling device for transferring the sheets from the worktable to the second store.
Such machines also comprise a positioning device for positioning the sheet at the work station; and a control unit for controlling the handling devices, the positioning device and the punch unit to automatically machine the sheets. More specifically, the positioning device is movable over the worktable to receive a sheet from the first handling device, position at least a portion of the sheet at the work station, and, finally, transfer the sheet to the second handling device.
The main drawback of machines of the above type is their size, which is out of all proportion to the size of the sheets that can be machined.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a machine tool of compact design.
According to the present invention, there is provided a machine tool for machining sheet metal, and comprising a worktable; a punch unit located on said worktable at a work station; a sheet feeding and positioning device for feeding and positioning at least one sheet at said work station; and a control unit for controlling said punch unit and said sheet feeding and positioning device; said punch unit comprising a ram located over the worktable at said work station; at least one punch located between said worktable and said ram at the work station; and a counterpunch located on the worktable at said work station and aligned with said punch; said sheet feeding and positioning device positioning at least a portion of said sheet on the worktable, between said punch and said counterpunch; and said machine tool being characterized by comprising two stores located beneath the worktable; each of said stores being located beneath a respective opening formed in said worktable; and said opening comprising movable closing means for selectively enabling the corresponding store to communicate with the top of said worktable.
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Rachuba M.
Rainer S.r.l.
Shlesinger & Arkwright & Garvey LLP
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