Multiple punch unit for punch presses
AssigneeEuromac S.p.A.
InventorEugenio Lenzotti
Life of this patent
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Abstract
A multiple punch apparatus for punch presses having a provision for preventing undesired damage to a work-piece includes a housing having a plurality of separate punches that include at least one inactive punch and one active punch, each inactive punch being supported in an elevated position by retention magnet means having flux lines oriented to extend into at least each inactive punch when the active punch is in a position in which it is driven into engagement with a work-piece, whereby each inactive punch is magnetically supported to prevent any unintended contact with the work-piece.
Claims13
A multiple punch apparatus for punch presses configured to prevent unintended damage to a work-piece, the apparatus comprising:
- a housing having a plurality of separate punches that comprise an inactive punch and an active punch,
- wherein each inactive punch is supported in an elevated position by retention magnet means having flux lines positioned to extend into each inactive punch when the active punch is positioned for being driven into engagement with a work-piece.
A punching apparatus to be used in punching presses, the punching apparatus comprising:
- an upper rotatable section rotating about a vertical central axis relative to a lower non-rotatable section;
- a pair of punches mounted for reciprocation in the lower non-rotatable section along axes that are spaced outwardly from a central axis;
- a punch carousel as a part of the rotatable section that has retention magnetic means thereon, the carousel being positioned for selective alignment with each of the punches responsive to rotation of the punch carousel;
- a punch striker mounted for reciprocation in the rotatable section for driving a selected one of the punches axially to an operating position into engagement with a work-piece while each of another of the punches is held in a retracted position by at least one of the retention magnetic means, and
- biasing magnetic means that bias the selected one of the punches to a retracted position for withdrawing the selected one of the punches from the work-piece, whereby each non-selected punch is held in an elevated position by magnetic attraction to prevent unintended contact between each punch that is not in use and the work-piece.
Dependencies are inferred from the claim text.