METHOD OF COLD PRESSING OF SUPPORT TRUNNIONS INTO MOUNTING SEATS OF BARRELS OF MILLING ROLLS Russian patent published in 2024 - IPC B23P11/02 

FIELD: machine building.

SUBSTANCE: method of cold pressing of support trunnions into mounting seats of barrels of milling rolls using external pressure includes pressing of support trunnions into mounting seats with diameter of 160 mm at depth of 165 mm, which are located along the axis of the mill roll barrels. Trunnions with seating diameter of 0.10–0.12 mm larger than diameter of the seating seat of the drum barrel are cooled in a container with liquid nitrogen to temperatures of minus 180–200 °C. Immediately after cooling, the trunnions are removed from the container by a cantilever crane and inserted into the seat of the barrel of the roll, installed in a vertical position, and 10 minutes after completion of the pressing process, the roll barrel is turned through 180° and the second support trunnion is pressed into its mounting seat from the opposite end surface of the roll by analogy with the first one.

EFFECT: accuracy and strength of connection of support trunnion with barrel of flour mill is provided.

4 cl