Mitsubishi Jukogyo Kabushiki Kaisha

Kawasaki Steel Corporation

Toshihiro Takemasa

Nobuyuki Taniguchi

Keiichi Katayama

Namio Suganuma

Kazuyoshi Hashimoto

Muneo Moriya

Hiroyasu Yuasa

A roll rearranging apparatus is so constructed that an upper roll unit of a tension leveler can be taken in and out together with a lower roll group from a housing. In order to greatly reduce the rearranging time and improve the production efficiency by reduction of labor and the safety of work, the apparatus comprises an arm which is provided at a work side end of a roll support supporting a roll unit, the arm including a hole at a lower side thereof, and an engagement capable of being engaged with the hole of the arm and including a moving up and down mechanism.

Roll rearranging apparatus

A method of controlling a tension levelling equipment for correcting residual distortions in an extension of strip including a series of input and output bridle roll means for rendering a tension upon the extension of strip extending between the input and output sides of a levelling mill station for smoothing out the distortions, and slipping clutch means connecting the bridle roll means with driving means allowing a slipping motion therebetween, which comprises the steps of measuring a current tension rendered upon the extension of strip at both the input and output sides of either of the input and output bridle roll means, and controlling the engaging torques of the slipping clutches in such a manner that a current slipping motion produced between the extension of strip and the bridle roll means may be nullified or eliminated according to the result of measurement of tensions, whereby it can remove all possible defects such as flaws and scratches in the surface of a strip product caused from the slipping motions as encountered during the passing through the tension leveler, thus contributing a substantial improvement in the surface condition and quality of the strip product.

Method of controlling a tension levelling equipment

A method of correcting distortions existing in a rolled strip product by using a tension leveling equipment including a leveling mill station for smoothing out distortions remained in the strip product by producing a permanent elongation through the repetition of bending procedures rendered upon the strip while passing under tension therethrough, a pair of bridle units disposed on the both input and output sides of the leveling mill station, and means for rendering a tension upon the strip from a predetermined rate of elongation under the effect of a difference in the feeding velocities of the bridle units, which comprises the steps of detecting the distortions in the shape of the strip product upon the delivery thereof from the output bridle unit, obtaining detection signals, and controlling the rate of intermeshing in the leveling mill station and the rate of elongation of the strip product to a required range in accordance with the detection signals. With this improved method, it can afford a high precision correction of distortions in the strip product, following closely the possible fluctuations in the physical conditions which are generally particular to the strip product, thus making it possible in practice to obtain a high-quality strip product, accordingly.

Method of correcting distortions in a rolled strip product

Growing community of inventors

Hiroshima, Japan

Toshihiro Takemasa