Title:
ROLLING EQUIPMENT OF ROD MATERIAL
Document Type and Number:
Japanese Patent JP3649025
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To easily execute the tension control at high accuracy with a simple reconstruction of equipment by regulating the ratio of the rated capacity (Wf) of a mill motor in a finishing mill and the rated capacity (Ws) of a mill motor at the upmost stream side of a sizing mill to a specified value or more.
SOLUTION: It is desirable to regulate the ratio Wf/Ws of the rated capacities Wf and Ws of the motors to ≥5. After finish-rolling a wire rod 1 with the finishing mill 2, this rod is sizing-rolled with the sizing mill 4 through a water cooling zone 3 and the necessary water-cooling is executed with the water cooling zone 3 and the wire rod is wound with a coiler. Under consideration to the rated capacity balance of both mill motors, the balance of the rated capacities is made to out of balance in the range of developing no trouble on the equipment, and the rated capacity of the mill motor Ms for sizing mill at the upmost stream side is made smaller in comparison with that of the mill motor Mf for finishing mill. In this way, a comparatively small stress variation is made to be treated as a relatively large current variation, and thus, the tension control of high accuracy can easily be executed.
Inventors:
Sakurai, Tomoyasu
Ogawa, Takao
Ogawa, Takao
Application Number:
JP1999000065847
Publication Date:
February 25, 2005
Filing Date:
March 12, 1999
Export Citation:
Assignee:
KAWASAKI STEEL CORP
International Classes:
B21B35/04; B21B1/16; B21B35/00; B21B37/48; B21B37/52; B21B1/18; (IPC1-7): B21B35/00; B21B1/16; B21B37/48