METHOD FOR HELICAL ROLLING OF HOLLOW BLANKS WITH BOTTOM Russian patent published in 2016 - IPC B21B19/06 

FIELD: technological processes.

SUBSTANCE: invention relates to rolling of solid-section parts with bottom. Method includes the following operations: separating dimensional single-piece blanks, center-drilling along the end thereof, heating, feeding them into feed chute of screw rolling mill, moving along the chute with a pusher until blank front end comes in contact with working rolls, catching workpieces with rolls and rolling on mandrel forming semi-finished product with cavity, calibrating the bottom and walls of the semi-finished product with subsequent cooling. Pusher used to push blanks into working rolls after the beginning of the piercing process continues to move the blank by its rear end along the rolling axis with the specified speed until it pushes the blank to the outlet side of the mill after removal of the mandrel from the deformation zone.

EFFECT: higher stability of operation in automatic mode and elimination of auxiliary operations and equipment for dispensing blanks from piercing mill.

1 cl, 1 dwg, 1 ex