DEVICE FOR PRODUCING CORRUGATIONS ON THE INNER SURFACE OF A CYLINDRICAL SHELL Russian patent published in 2023 - IPC B21K21/08 B21J5/12 B21J13/00 B21C37/20 

FIELD: pressure treatment.

SUBSTANCE: production of cylindrical shells, on the inner surface of which a grid of diamond-shaped corrugations is applied. The device consists of a container with a spring-loaded puller and a pusher located in the container in contact with the pusher. There is a shank with a tool rod mounted in bearings with a working mandrel made with spiral wedge ledges with a lead angle of not more than 45°. The device is equipped with a guide column fixed in the container and made with spiral cavities. The angle of elevation of the depressions is equal to the angle of elevation of the spiral wedge protrusions of the working mandrel. The tool rod is made hollow and equipped with guide ledges that can be located in the spiral cavities of the guide column.

EFFECT: process capabilities of the device are expanded and the quality of the corrugated surface is improved.

1 cl, 7 dwg