Laminated punch and die assemblies

Details Laminated punch and die assemblies Laminated punch and die assemblies

1998-02-09

1999-03-09

Jones, David

Metal deforming

Tool and/or tool holder

Having unitary tool-face

72381, 723893, 72413, B21D 502, B21D 3702

Patent

active

058786198

ABSTRACT:
A laminated punch assembly (20) is adapted for use in a press brake to bend sheet metal (M) interposed between a punch and die when the punch and die are moved relatively toward one another. The improved punch assembly includes a plurality of plate-like members (24). Each member has large-area obverse and reverse faces (30, 31), and has a peripheral surface. A slot extends into each member from a portion of its peripheral surface, and communicates the two faces. The plurality of members are arranged in face-to-face area contact to define an elongated laminated punch assembly, with the slots of each member being aligned to form an elongated slot in the punch assembly. An elongated insert (26) is adapted to be slidably inserted into the punch assembly slot, and has an exposed bending surface (63) adapted to engage the sheet material when the brake is used.
The invention also provides an improved die assembly for use in such a press brake. The improved die assembly similarly includes a plurality of plate-like members (28), with each member having large-area obverse and reverse faces (65, 66) and having a peripheral surface. A slot extends into each member from a portion of the peripheral surface, and communicates the two faces. A plurality of the members are arranged in face-to-face area contact to define an elongated laminated die assembly, with the slots of each member being aligned to form an elongated slot in the die assembly. An elongated insert (29) is adapted to be slidably inserted into the die assembly slot. The insert has a die surface adapted to engage the sheet material when the brake is used.

REFERENCES:
patent: 271178 (1883-01-01), Wieser
patent: 3323348 (1967-06-01), Pearson
patent: 3474657 (1969-10-01), Spiegel

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