Hitachi, Ltd.

Kawasaki Steel Corporation

Mitsuo Nihei

Toshiyuki Kajiwara

Tomoaki Kimura

Yoshio Takakura

Kenichi Yasuda

Takehiko Saito

Kenjiro Narita

Yukio Hirama

Hideyuki Nikaido

Tadashi Nishino

Yasutsugu Yoshimura

Keiichi Kuniya

Takao Funamoto

Masahisa Sobue

Fuminori Ishikawa

Shinichi Kaga

Hidetoshi Nishi

Kimihiko Akahori

Hironori Shimogama

Toshimi Sasaki

Takashi Kamoshita

Takashi Mashiko

Sensuke Okada

Atsushi Komori

Gen Nagakubo

Yusutsugu Yoshimura

Toshiyasu Shinmura

Kenji Yamamoto

Kenji Horii

Takayuki Naoi

Kouji Satou

Kouichi Seki

Toyotsugu Masuda

Yoshihiko Iida

Minoru Igari

Kenichi Yoshimoto

Naoi Takayuki

Ryohei Konose

There are disclosed a rolling mill capable of keeping a uniform plate of thickness distribution and manufacturing a good-quality plate, and a rolling method. The rolling mill comprises working rolls movable in roll axis directions, profile-measuring means for measuring the profile of each of the working rolls, profile-estimating means for estimating the profile thereof, and a grinder for grinding each of the working rolls. The rolling mill also comprises instructing means for sending a command of grinding to the grinder at a time when the measured profile value or the estimated profile value regarding each of the working rolls reaches a given value.

Rolling mill and rolling method

The invention intends to always maintain a distance between a hydrostatic pressure bearing and a roll even in a transient state before and after the start of rolling, thereby sufficiently and surely preventing damage of those components upon contact with each other, and to prevent a lowering of yield. In a plate rolling mill comprising upper and lower work rolls, and hydrostatic pressure bearings for supporting barrel portions of idler rolls in a non-contact manner with fluid pressure substantially along the horizontal direction, the idler rolls supporting the work rolls substantially along the horizontal direction, gap restraining rolls are provided to prevent gaps between the hydrostatic pressure bearings and the idler rolls from becoming lower than a predetermined value.

Plate rolling mill

There are disclosed a rolling mill capable of keeping a uniform plate thickness distribution and manufacturing a good-quality plate, and a rolling method. The rolling mill comprises working rolls movable in roll axis directions, profile-measuring means for measuring the profile of each of the working rolls, profile-estimating means for estimating the profile thereof, and a grinder for grinding each of the working rolls. The rolling mill also comprises instructing means for sending a command of grinding to the grinder at a time when the measured profile value or the estimated profile value regarding each of the working rolls reaches a given value.

The work rolls of two sets of roller groups are held within one-piece metal chock in a rolling mill. A one-piece metal chock in which the driving side and operating side are separate then provides support at the upper part of the rolling material, with support similarly being provided at the lower part using another pair of single piece metal chocks. Two sets of roll groups can then be arranged close to each other, strip walking and strip curving can be prevented, and a rolling mill, rolling method and rolling installation that are easy to maintain and provide superior rolling efficiency can be provided.

Rolling mill and rolling method and rolling equipment

A bonding apparatus for bonding metal plates, includes an overlapping mechanism for overlapping end portions of the metal plates, at least two supports for supporting the overlapped portion of the metal plates at one side of the metal plates, and a shearing blade disposed opposite the supports so as to sandwich the overlapped portion of the metal plates therebetween, wherein a moving mechanism is provided for relatively moving at least one of the shearing blade and the supports so as to press the shearing blade into the overlapped portion of the metal plates disposed between the supports and the shearing glade. A method for bonding is characterized by bonding metal plates by using the above apparatus.

Method of bonding metal plates, apparatus therefor and hot strip mill

There are provided a rolling machine and a rolling method in which the strip crown and shape control capability for a narrow-width strip is improved, so that the adequate strip crown and shape control capability for strips of various widths from a narrow width to a larger width can be secured. In the rolling machine, a pair of upper and lower working rolls are supported respectively by a pair of upper and lower intermediate rolls, and the intermediate rolls are supported respectively by a pair of upper and lower reinforcing rolls. The reinforcing rolls have an effective barrel length which is smaller than an effective barrel length of the working rolls and the intermediate rolls, and is larger than a width of a minimum-width strip to be rolled. The intermediate rolls are arranged in such a manner that their axes, disposed respectively in substantially horizontal planes, cross each other, and are crossed relative to the working rolls and the reinforcing rolls. The maximum cross angle of the intermediate rolls are increased and decreased in accordance with the width of the strip.

Rolling machine and rolling method

A rolling mill is provided with a pair of work rolls 2, a pair of intermediate rolls 3 and a pair of backup rolls 4 in a mill stand 5, wherein the pair of backup rolls are arranged so that their axial lines cross perpendicularly a plate travelling direction and do not incline to the direction in a horizontal plane, the intermediate rolls and work rolls are arranged so that the axial lines of the intermediate rolls and the axial line of the work rolls incline to (cross) the axes of the backup rolls in a counter direction to each other in a horizontal plane, and a lubricant supplying apparatus 6 is provided for supplying a lubricant to the roll surfaces.

A rolling mill drive apparatus for driving any rolls of a pair of work rolls, 2 to 4 intermediate rolls and 2 to 4 backup rolls comprises a drive roller without tooth, rotated by an electric motor, at least one driven roller without tooth, contacting with the drive roller, a load imparting device for imparting a contact load between the drive roller and the driven roller to rotate the driven roller with frictional force caused by the contact load, and a spindle connected to at least the driven roller of the drive roller and the driven roller and transmitting rotation of the driven roller to the rolls. A rolling mill uses the rolling mill drive apparatus. A rolling method is for rolling using the rolling mill.

Rolling mill drive apparatus, rolling mill and rolling method

A bonding apparatus for bonding metal plates, includes an overlapping mechanism for overlapping end portions of the metal plates, at least two supports for supporting the overlapped portion of the metal plates at one side of the metal plates, and a shearing blade disposed opposite the supports so as to sandwich the overlapped portion of the metal plates therebetween, wherein a mechanism is provided for moving relatively moving at least one of the shearing blade and the supports so as to press the shearing blade into the overlapped portion of the metal plates disposed between the supports and the shearing blade. A method for bonding is characterized by bonding metal plates by using the above apparatus.

In a continuous process for continuous casting and hot-rolling of metal sheet, off-line storage of a slab takes place in a thermally insulated storage chamber located alongside a thermally insulated zone through which the slab lengths travel in the production line between a cutter for the slab and the hot-rolling mill train. On stoppage of the hot-rolling mill train, at least one slab length is transferred laterally to the off-line thermally insulated storage chamber. To improve ductility, an induction heating stage is combined with a subsequent temperature-maintaining stage in the furnace for homogenization of temperature within the slab. Both these stages are performed on the slab at its casting thickness.

Method and apparatus for continuous casting and hot-rolling

A roller for rolling mill comprising an entirely non-metallic sintered body composed principally of at least one material selected from silicon carbide, silicon nitride, sialon, alumina and zirconia and having a relative density which is at least 96% of the theoretical density, the roller having an initial crown in the range of -300 .mu.m to +300 .mu.m, is provided. This roller for rolling mill has a high hardness and high wear resistance and can be used as a work roll.

Rollers for rolling mills

A press apparatus for reducing widths of hot slabs comprises a pair of anvils movable toward and away from each other in width directions of the hot slabs, width reduction heads to which the pair of anvils are attached, respectively, and eccentric presses for reciprocatively driving the width reduction heads through sliders, respectively. The apparatus further comprises width adjusting means incorporated in the eccentric presses, respectively, for changing distances between the width reduction heads and the sliders. Each of the anvils has a parallel portion in parallel to a feeding direction of the hot slabs and an inclined portion on an entry side in the feeding direction. With this arrangement, the reducing distance can be set according to the desired distance of reduction in width in continuous width reduction and the reduction in width can be continuously effected with the set reducing distance with high efficiency. The press apparatus preferably further comprises buckling preventing means such as rollers controlled by hydraulic cylinders for urging at least two locations of the slab along a central longitudinal line of the slab and on upstream and downstream sides of a line connecting junctions of the parallel portions and the inclined portions of the anvils, thereby preventing any buckling of the slab occurring in reduction in width of the slab.

Press apparatus for reducing widths of hot slabs

A roller for rolling mill comprising an entirely non-metallic sintered body composed principally of at least one material selected from silicon carbide, silicon nitride, sialon, alumina and zirconia and having a relative density which is at least 96% of the theoretical density of the sintered body, the roller having an initial crown in the range of -300 .mu.m to +300 .mu.m, is provided. This roller for rolling mill has a high hardness and high wear resistance and can be used as a work roll.

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Hitachi, Japan

Mitsuo Nihei