DIE FOR BENDING TRANSPORTATION GRID BRANCH Russian patent published in 2002 - IPC

FIELD: plastic working of metals. SUBSTANCE: die for bending transportation wire grid has matrix with slot for spring-loaded plank, which is movable by pin, punch composed of parts pivotally connected and fixed in punch holders, and cylindrical guides mounted on punch holders. Pressure devices are fixed on stems of stamping cylinders of drive and movable along cylindrical guides. Eyelets fixed on outer parts of punch are provided with slots for receiving spindles engageable with stem forks of retaining cylinder of drive. Height of matrix working surface is less than height of part to be stamped. Such construction allows formation of sickle-shaped parts to be avoided. EFFECT: increased efficiency and improved quality of article. 7 dwg