CUTTING OFF AND BENDING DIE SET Russian patent published in 1997 - IPC

FIELD: plastic metal working, namely manufacture of complex-shape bent products. SUBSTANCE: die set includes upper plate 1 with bending punch 2 and two cutting inserts 3,4 and lower plate 5 with die 6 and cutters 9,10. Inserts 3,4 are placed in plate 1 at the same side of punch 2, they are mutually spaced by distance L and arranged in level of bending plane of punch 2. Cutters 9,10 are mutually spaced by distance L and arranged in different levels. When upper plate 1 moves downwards, at first part 14 is cut off from strip 12 by means of insert 4 and cutter 10 and then said part is deformed by means of bending punch 2 and die 6. At the end of punch stroke interpart bridge 13 is cut off and immediately it is removed along slope. Process of cutting off ready part is realized by two stages at the beginning and at the end of last bending operation. Ready part 14 is removed from working level as moved by stroke of fed strip 12. EFFECT: improved design. 1 dwg