FIELD: metallurgy.
SUBSTANCE: blank is cut in the press one pass without wastes with the help of die in the line symmetric about the reel axis. Upper part of said line starts from the straight line to be continued by the curve of definite geometry of worked blank curvature radius. Said curve is continued by the straight line turned from the vertical counter clockwise. Said straight line is continued by the curve continued by vertical straight line to the reel axis. Lower part of the reel cutting line, from the reel mirror axis to the reel lower side, is symmetric about the blank cutting line upper part. In compliance with all versions, cutting of shaped blanks is made without wastes and with previous blank shaped penetrating in the next blank outline.
EFFECT: decreased reel feed stroke, higher sheet outline precision and die durability.
12 cl, 6 dwg
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