Tension control system for continuous annealing apparatus of steel strip

• Main Authors: IMANAKA, SHIGEKAZU, ONO, MASAO, KATOH, HARUMI, HONDA, TOSHIMITSU, TAMIYA, TSUTOMU, HATTORI, YOSHITAKA, KITAWAKI, YASUO, GOSHI, HIROOHITAKA
• Format: Patent
• Language: English; French; German
• Published: 18.08.1999
• Edition: 6
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

In a continuous process line for manufacturing a soft steel strip for drawing, etc., the present invention relates to a tension control system for a continuous annealing apparatus of a steel strip for preventing the occurence of heat buckling, scratching and walking of the steel strip and improving productivity and quality. In a continuous process line of a steel strip disposing a pair of out-furnace bridle rolls facing each other at an entry side and/or delivery side of a treating equipment, a tension control system of a steel strip characterized in that a first bridle roll, a second bridle roll and a buffer roll coming into contact with said steel strip between both of said bridle rolls are disposed, said buffer roll can move in circle in a direction crossing a pass line connecting rolls before and after said buffer roll in accordance with a tension variation of said steel strip, and said tension is regulated by an angle alpha between an arm of said buffer roll and said pass line.