Mitsubishi Jukogyo Kabushiki Kaisha

Nippon Steel Corporation

Kazuyoshi Hashimoto

Takao Kawanami

Nobuyuki Taniguchi

Tsuneo Nakano

Toshihiro Takemasa

Goro Fukuyama

Yoshio Shimosato

Tetsuo Kajiwara

Koichi Mori

Kazutoyo Arita

An apparatus for changing the direction of travel of a web-like material without inverting the front and rear surfaces of the web-like material is improved in that a plurality of guide rotors are disposed on each of a plurality of spiral curves along an imaginary conical surface so as to be rotatable about axes intersecting at right angles with the corresponding spiral curve on the imaginary conical surface, and a conical surface formed by an enveloping surface of these guide rotors is used as a traveling path of the web-like material, whereby shortcomings inherent in such apparatus in the prior art can be eliminated.

Apparatus for changing the traveling direction of a web-like material

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

In a rolling mill in which at least one of paired work rolls for rolling metal strips is formed to have a small diameter and is backed up by a pair of first intermediate rolls which in turn are backed up either directly by a plurality of backup rolls or indirectly by a plurality of backup rolls through second intermediate rolls, the rolling mill of the present invention is characterized in that a bearing case containing bearings is provided to each end of the small diameter work roll and to each end of the pair of first intermediate rolls supporting the small diameter work roll so that these rolls are supported on the bearing cases through bearings, and hydraulic cylinders are provided for applying independent roll bending forces to the work roll bearing cases and the intermediate roll bearing cases.

Rolling mill

Growing community of inventors

Hiroshima, Japan

Kazuyoshi Hashimoto