FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may be used in producing thin-wall shells from maraging steel. Hollow shaped workpiece is made from bar section by extruding and cutting. Shaped workpiece consists of large and small cylinders jointed by adapter cone and features wall thickness varying in height. Large cylinder wall thickness is twice is lathe as that of adapter cone. That workpiece is subjected to extrusion and thermal treatment for stress relief to make thin-wall shell. Rotary extrusion is carried out in three stages with tolerable strain of thin-wall shell. At first stage, workpiece large cylinder is machined to wall thickness equal to or smaller than that of adapter cone. Then local rotary swaging of larger cylinder and final machining are performed.
EFFECT: reduced metal consumption, higher quality of final products.
3 cl, 6 dwg, 1 ex
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