LOW-WASTE TWO-ROW CUTTING OF BLANKS FROM STRIP (VERSIONS) Russian patent published in 2014 - IPC B21D28/06 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to cutting of blanks. First, the pattern of two-row staggered arrangement at the strip without webs of one configuration of blanks of design shape in the first row and the same or other configuration of design shape blanks in second row are designed to define the strip width. Then, one blank is cut by male dies and top blades by design contours of blanks with actual contour from top row, male dies and blades being mounted at the first die top position at strip and top blades feed pitch from vertical axis of previous blank in top row. In compliance with another version, second blank is cut with actual contour from bottom row. Then, for cutting of the next one or two blanks, strip or cutting die are displaced in crosswise direction by such magnitude that make male dies and top blades extend beyond the strip edge. The strip is fed by pitch in lengthwise direction. At die first bottom position, one blank with actual contour from bottom row is cut to design contours of blanks at strip feed pitch by bottom blades. Similarly, strip or cutting die are displaced downward in crosswise direction, strip is fed by pitch in lengthwise direction to automatically repeat cycles of cutting of one or two blanks at every pitch of equipment.

EFFECT: higher precision of cut blanks and durability of cutting die.

7 cl, 7 dwg