FIELD: plastic metal working, possibly manufacture of cylindrical articles from sheet blanks by action of compressed air pressure.
SUBSTANCE: method comprises steps of making flat sheet blanks of different width; discretely securing less width blanks to surface of wide blank; simultaneously imparting to blank cylindrical form and forming hollow lengthwise ribs; on formed cylindrical articles forming lengthwise straight edges arranged in parallel relative to vertical longitudinal plane by cold deforming, for example by means of punch.
EFFECT: lowered metal and labor consumption for forming articles, increased rigidity and carrying capacity.
3 dwg, 2 ex
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