Hitachi, Ltd.

Research Institute of Industrial Science & Technology

Pohang Iron & Steel Co. Ltd.

Yasutsugu Yoshimura

Tadashi Nishino

Toshiyuki Kajiwara

Shigeru Mori

Hiroyuki Shiraiwa

Shigetoshi Kondoh

Yasuharu Imagawa

Yoshio Takakura

Kenji Horii

Shinichi Kaga

Takao Sakanaka

Ken-ichi Yasuda

Hironori Shimogama

Tokuji Sugiyama

Koichi Seki

Yutaka Fukui

Tomoaki Kimura

Satoshi Hirano

Mitsuo Nihei

Takao Funamoto

Hideyo Kodama

Kenjiro Narita

Ryohei Kinose

Chukichi Hanzawa

Akira Goto

Kenji Yamamoto

Yukio Saito

Junji Sakai

Yukio Hirama

Fuminori Ishikawa

Mitsuo Nakagawa

Teruo Sekiya

Hidetoshi Nishi

Toshiyuki Yoshimura

Kouji Satou

Takashi Kamoshita

Kouichi Seki

Jung-Sik Lee

Jong-Sub Lee

Yoshihiko Iida

Takashi Mashiko

Osamu Shitamura

Toyotsugu Masuda

Yujirou Kobayashi

Hidekazu Tabata

Jong-Keun Kim

Takehisa Kimura

Takayoshi Tomino

Ryohei Konose

Ki-Chol Kim

Hwang-Kyu Hwang

Jin-Hee Kim

Tadayuki Watanabe

Shinichi Yasunari

Shigekazu Nagashima

Ken-ichi Yoshimoto

Mituru Onose

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

In a molten metal plating apparatus all surfaces of a sinking roller and a supporting roller to be in contact with a molten metal are coated with iron silicide films. A bearing comprises a holder made of a heat resistant steel and lined with a carbon-carbon fiber complex material. A surface of the holder is coated with an Fe,Si film similar to the sinking roller. There is an Fe,Si film on a surface of a shaft portion, and the Fe,Si is in contact with and slides on the carbon-carbon fiber complex material.

Molten metal plating apparatus

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 cluster type rolling mill comprises a pair of work rolls, intermediate rolls, backing rolls, backing roll chock movable in the up and down directions, intermediate roll chocks held by the backing roll chocks work roll chocks held by the intermediate roll chocks hydraulic cylinders for shifting the intermediate rolls in the axial direction and hydraulic cylinders for applying bending force to the intermediate rolls and work rolls.

Cluster type rolling mill and rolling method

A work roll crossing type rolling mill has back-up rolls arranged in such a manner that their axes are not inclined in a horizontal plane. Work rolls are constructed in such a manner that their axes can be inclined in a horizontal plane relative to the backup rolls such that the axes of the work rolls cross the axes of the back-up rolls and such that the axes of the work rolls cross each other. A lubricant supply device is provided for supplying a lubricant between each work roll and each back-up roll combination to greatly reduce the thrust exerted to the work rolls, whereby the rolling mill is given an excellent ability of controlling the crown of the material to be rolled.

Rolling mill, hot rolling system, rolling method and rolling mill

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

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 work roll cross type rolling mill comprises a pair of work rolls and a pair of back-up rolls for backing up the work rolls. The back-up rolls are so arranged that their axes can be inclined within horizontal planes only to three or four specific angular positions. The work rolls are allowed to be inclined within horizontal planes with respect to the back-up rolls such that the axes of the work rolls cross the axes of the associated back-up rolls and cross each other. The nip between each the work roll and the associated back-up roll is lubricated so as to reduce axial thrust generated therebetween due to the crossing of the rolls. The cross angle between the work rolls is set and controlled during rolling operation only when the roll peripheral speed or the rolling speed is 50 m/min or higher. Advantages of work roll cross type rolling mill are fully extended to realize stable rolling without trouble so as to ensure high quality of the rolled product while achieving higher rate of operation of the mill with facilitated operation.

Rolling mill and method of using the same

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

Growing community of inventors

Hitachi, Japan

Yasutsugu Yoshimura