Тернопольский Национальный Технический Университет Имени Ивана Пулюя
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A method of manufacturing screw blanks, in which a flat blank is cut from sheet metal in the form of a multi-turn tape helix with subsequent forming a helical coil and its calibration for a pitch. Forming the helical spiral is carried out by asymmetric reduction of the multi-turn spiral on its width by means of rolls that form between them a wedge-shaped slit.
UAU201008770U2010-07-142010-07-14Method of manufacturing screw blanks
UA56791U
(en)