BANDAGED PART AND METHOD FOR MAKING IT Russian patent published in 2006 - IPC B21B27/03 B21B39/00 

FIELD: metallurgy, namely processes for making bandaged parts of metallurgical equipment in the form of bodies of revolution subjected to action of outer thermal loads, for example supporting rollers of rotary furnaces, drying drums, conveyer rollers, possibly in plants for continuous casting of metal combined with rolling mills.

SUBSTANCE: part includes inner cylindrical member having annular turning in its mounting surface and embracing its bandage. According to invention mounting surfaces of inner cylindrical member and bandage are double-step ones. Bandage includes two portions corresponding to its steps. Turning is formed along boundary of steps in central zone of inner cylindrical member. On inner edges of mounting surfaces of both portions of bandage there are shoulders corresponding to turning and having height consisting of 0.002 - 0.015 of diameter of mounting surfaces of bandage portions. Depth of turning exceeds height of shoulders of respective portions of bandage by 1.1 - 2 times. Method for making bandaged part comprises steps of forming mounting surfaces of inner cylindrical member and of bandage as double-step ones; forming bandage of two portions corresponding to said steps; forming turning on boundary of two steps in central zone of inner cylindrical member; forming on inner edges of mounting surfaces of both portions of bandage shoulders corresponding to turning and having height consisting of 0.002 - 0.015 of diameter of mounting surfaces of bandage portions; forming turning with depth exceeding height of shoulders of respective portions of bandage by 1.1 - 2 times.

EFFECT: improved operational reliability of joint in mode of high temperature and significant axial loads.

2 cl, 1 dwg, 1 ex