公开(公告)号：US20230201900A1

公开(公告)日：2023-06-29

申请号：US18020926

申请日：2021-06-30

Applicant: SMS group GmbH

Inventor： Walter KIRCHNER ,  Paolo MARIN ,  Patrizio RINALDI

IPC: B21B25/02 ,  B21B17/04

CPC classification number: B21B25/02 ,  B21B17/04

Abstract: A device for handling mandrel rods in a rolling plant for rolling seamless tubes comprises an inserter. The inserter moves a mandrel rod in a rolling direction such that the mandrel rod, starting from an initial state, is pushed into a tube blank situated upstream of the mandrel rod. A retaining device has a fixing unit that is movable along the rolling line and is designed to temporarily hold the mandrel rod at an action point at a rear end of the mandrel rod and to carry out a working stroke. The mandrel rod can be inserted into the rolling mill in the rolling direction and pulled out of the rolling mill counter to the rolling direction by the retaining device. The retaining device is designed such that the starting position of the fixing unit lies between the two ends of the mandrel rod in the initial state.