Hitachi, Ltd.

Nisshin Steel Co., Ltd.

Kawasaki Steel Corporation

Research Institute of Industrial Science & Technology

Pohang Iron & Steel Co. Ltd.

Tadashi Nishino

Yasutsugu Yoshimura

Tomoaki Kimura

Toshiyuki Kajiwara

Shigeru Mori

Hiroyuki Shiraiwa

Shigetoshi Kondoh

Yasuharu Imagawa

Kenji Horii

Yoshio Takakura

Takao Funamoto

Hironori Shimogama

Fuminori Ishikawa

Takashi Mashiko

Koichi Seki

Yutaka Fukui

Satoshi Hirano

Mitsuo Nihei

Kenichi Yasuda

Hideyo Kodama

Kenjiro Narita

Gen Nagakubo

Yusutsugu Yoshimura

Chukichi Hanzawa

Akira Goto

Takashi Yoshida

Takashi Yamauchi

Tadahiko Nogami

Yukio Hirama

Teruo Sekiya

Shinichi Kaga

Sadayuki Saito

Ken-ichi Yasuda

Kouji Satou

Takashi Kamoshita

Jung-Sik Lee

Jong-Sub Lee

Jong-Keun Kim

Takayuki Nakanori

Tadayuki Watanabe

Takayoshi Tomino

Ken-ichi Yoshimoto

Ki-Chol Kim

Mituru Onose

Hwang-Kyu Hwang

Kenji Tabushi

Kazuyoshi Nishimura

Jin-Hee Kim

Tatsushi Aizawa, Deceased

An upper shearing blade equipped with a protrusion of a triangle-columnar shape and a lower shearing blade equipped with a protrusion of the same shape are applied onto the overlapped portion of metal plates to be bonded, and then pressed into the metal plates in an oblique direction inclined with respect to the thickness direction by a stroke in such a range that the metal plates are not completely cut off. The operating loci of the upper, shearing blade and the lower shearing blade are overlapped each other so that one falls inside the other, and the sheared surfaces of the metal plates are formed into a bonded portion by plastic flow deformation. Therein, since a compressive force is applied onto the portions to be bonded, the portion being defined by the amount of overlap, and the portions are compressed to form a compressed portion after completion of bonding, the bonding strength enhances. Besides, since the protrusions on the shearing blades generate a pressing force pressing the sheared surfaces onto each other, by an effect of their inclined surfaces, a compression force applied onto the bonded portion further increases.

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

A grinding head unit is constituted by a grinding wheel, a drive device for rotating the grinding wheel, and a movement device for moving the grinding wheel. When vibration of a mill roll is applied to the grinding wheel, a plain wheel integral with an abrasive layer of the grinding wheel and having an elastically deforming function is deflected to absorb the vibration energy. The contact force between the abrasive layer and the mill roll is measured for determining a profile of the mill roll. The mill roll can be thereby ground into a target profile while absorbing the vibration transmitted from the mill roll and measuring the profile of the mill roll, without causing any chattering marks.

Rolling mill equipped with on-line roll grinding system and grinding wheel

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.

Rolling mill equipped with on-line roll grinding system and grinding

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.

The apparatus is formed by confronting wide side mold walls and confronting narrow side mold walls, The narrow side mold walls are composed of an electrically conductive refractory material and are directly heated. Each of the narrow side mold walls include an upper squeezed portion and a lower parallel portion, The upper squeezed portion has a surface in contact with the molten metal which converges in width along a casting direction. The lower parallel portion has surface in contact with the molten metal which is substantially uniform in width.

Apparatus for and method of continuous casting

By rolling a slab with a thickness of 80 mm or less in a plant including a continuous casting machine and a hot strip rolling mill directly combined with each other, low-speed rolling can be achieved while suppressing a drop of the strip temperature and the occurrence of scales. After a slab 2 cast by a continuous casting machine 1 and being 80 mm or less thick is heated and descaled, it is rough-rolled into a bar with a thickness of 20 to 60 mm by a roughing mill 7 constructed as a 4H-twin mill. After being heated and descaled again, the bar is finish-rolled by finishing mills 19 to 21, each of which employs small-diameter work rolls having a diameter not larger than 500 mm, into a thin plate with a thickness in the range of 1.6 mm to 15 mm or a thick plate with a thickness in the range of 3 mm to 40 mm. The rolling speed on the delivery side of the finishing mills 19 to 21 is set to be as low as 350 m/minute or less with a result of small production scale, and the plant length is set to be not longer than 100 m with a result of small plant space.

Hot strip rolling plant and method directly combined with continuous

The integrated manufacturing system is formed by the combination of a continuous casting apparatus and hot rolling mills. The continuous casting apparatus is formed by confronting wide side mold walls and confronting narrow side mold walls. The narrow side mold walls are composed of an electrically conductive refractory material and are directly heated. Each of the narrow side mold walls include an upper squeezed portion and a lower parallel portion. The upper squeezed portion has a surface in contact with the molten metal which converges in width along a casting direction. The lower parallel portion has a surface in contact with the molten metal which is substantially uniform in width.

Integrated manufacturing system

In a system and method for manufacturing thin plate by hot-working, a splicing machine for continuously splicing the front edge of a following plate and the rear edge of a precedent plate is provided in the process precedent to a set of rolling mill stands having non-driven small diameter working rollers. By continuously splicing the plates, most portions of the rolled plates can be rolled under a steady state rolling condition, that is, an after-engaged rolling condition, and the thickness reducing amount of the plates in most portions of the rolled material is substantially increased, which substantially improves the rolling efficiency. Thereby, the diameter of the working rollers can be decreased smaller than the diameter of working roller used in a conventional rolling mill, rolling mill strands can be made small, and it can be realized to attain a small-scale system for manufacturing thin plate by hot working.

System and method for manufacturing thin plate by hot working

Guide roller units are made movable back and forth in the direction of thickness of a slab, allowing slab lagging covers to be inserted to and withdrawn from gaps formed between the guide roller units and the slab. Depending on the casting speed, those ones of the guide roller units and the slab lagging covers which are in proper positions are replaced from one to the other for selective use so that the respective lengths of a cooling zone and a heat keeping zone are adjusted to control the cooling rate of the slab in a positive manner. The slab temperature can be kept at a value capable of carrying out rolling regardless of change in the casting speed depending on variations in the amount of molten steel supplied.

Thin slab continuous casting machine and method

Growing community of inventors

Hitachi, Japan

Tadashi Nishino