FIELD: mechanical engineering. SUBSTANCE: method of helical broach of sheets includes supply and basing of sheet block, hole puncture with the help of perforation mechanism, winding of helical thread and its intake into block holes. The intake is carried out in synchronism with block displacement with step equal to this displacement. The intake of each loop is fulfilled in synchronism with winding of corresponding loop. The puncture is exercised alternately one hole at a time by means of discrete step-by-step displacement of block relative to mechanism of perforation. EFFECT: facilitated manufacture. 2 dwg
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