METHOD OF MANUFACTURE OF HIGH-PRESSURE CYLINDERS Russian patent published in 2008 - IPC F17C1/00 B21D51/24 

FIELD: plastic metal working.

SUBSTANCE: invention relates to methods of manufacture of high-pressure cylinders, such as fire extinguisher cylinders. According to proposed method, thick-walled cylindrical tube blank of required length is cut off, blind bottom plate and bottom plate with neck for connecting shutoff valve are fitted relative to edges of tube blank, bottoms are upset from both sides in tube cylindrical blank to form lock joints and to provide adequate sealing of joints. Prior to fitting of bottoms relative to edges of blacks inner diameter of tube cylindrical blank is calibrated and blank is subjected to cold rolling with thinning out by reverse rotary drawing over entire length of cylindrical tube blank. Upsetting into lock joint of blind bottom plate and bottom plate with neck in tube cylindrical blank is carried out in succession from each side of blank. After cutting off of cylindrical tube blank, cleaning of blank from scale and rust is carried out. After rolling of cylindrical tube blank, it is subjected to turning in lathe to remove head.

EFFECT: improved quality of article owing to higher accuracy of manufacture, reduced cost of articles owing to reduction of material usage.

3 cl, 4 dwg