FIELD: machine building.
SUBSTANCE: hollow one-piece blank with bottom is pressed from a bar section, local bulges are provided on the bottom on the outer and/or inner side. The following operations are performed: machining of the blank internal and external surfaces, rotary drawing with thinning with permissible deformation degree, thermal treatment and finishing machining. The local bulges shall exceed the minimal thickness of the shell by at least 10 times.
EFFECT: improved strength characteristics.
2 dwg
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