FIELD: metallurgy.
SUBSTANCE: invention relates to stamping, particularly facilities for manufacturing of protective flapping diaphragms. Rod with cargo is lifted by screw clamp relative to plane of band blank for height, less then defined height of diaphragm dome. Under the influence of compressed air diaphragm dome contact to contact disk and lift for defined height, defined by optoelectronic position detector, which controls threshold element. By changing of cargo value and lift of diaphragm dome under action of cargo it is formed diaphragm with defined value of critical pressure.
EFFECT: it is increased product yield.
3 cl, 4 dwg, 4 tbl
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