Ishikawajima-harima Jukogyo Kabushiki Kaisha

Ihi Corporation

Other

Nippon Steel Corporation

Isao Imai

Hiroyuki Shiozaki

Heiji Kato

Ujihiro Nishiike

Tsuyoshi Tosho

Toshinori Ota

Tsukasa Oyauchi

Masao Nitanda

Kouiti Fujita

Kazuyuki Sato

Yasuhiro Fujii

Satoshi Murata

Nobuhiro Tazoe

Hiroki Yoshizawa

Takao Kawanami

Sadakazu Masuda

Yoichi Motoyashiki

Toshio Iwanami

Kenichi Ide

Hisashi Sato

Shozo Ikemune

Yasushi Dodo

Hiroshi Sekine

Shigeki Narushima

Hiromasa Hirata

Masao Mikami

Shuichi Yamashina

Kinichi Higuchi

Yasuhiro Omura

Toshihiko Obata

Mitsuhiko Ichikawa

Masujiro Yoshida

Takaaki Mori

Kohei Hosoi

Hirold Yoshizawa

Mitsuru Muto

A metal mixture is prepared, in which an excess amount of Te is added to a (Bi&#x2014;Sb)Tebased composition. After melting the metal mixture, the molten metal is solidified on a surface of a cooling roll of which the circumferential velocity is no higher than 5 m/sec, so as to have a thickness of no less than 30 &#x3bc;m. Thus, a plate shaped raw thermoelectric semiconductor materialsare manufactured, in which Te rich phases are microscopically dispersed in complex compound semiconductor phases, and extending directions of C face of most of crystal grains are uniformly oriented. The raw thermoelectric semiconductor materialsare layered in the direction of the plate thickness. And the layered body is solidified and formed to form a compact. After that, the compactis plastically deformed in such a manner that a shear force is applied in a uniaxial direction that is approximately parallel to the main layering direction of the raw thermoelectric semiconductor materials. As a result, a thermoelectric semiconductorhaving crystal orientation in which extending direction of C face and the direction of c-axis of the hexagonal structure are approximately aligned. As a result, the crystalline orientation is improved, and the thermoelectric Figure-of-Merit is increased.

Thermoelectric semiconductor material, thermoelectric semiconductor element using thermoelectric semiconductor material, thermoelectric module using thermoelectric semiconductor element and manufacturing method for same

A material to be shaped is reduced and formed by bringing dies with convex forming surfaces, when viewed from the side of the transfer line of the material close to the transfer line from above and below the material in synchronism with each other, while giving the dies a swinging motion in such a manner that the portions of the forming surfaces of the dies, in contact with the material are transferred from the upstream to the downstream side in the direction of the transfer line.

Plate reduction press apparatus and methods

Axially extending liquid-tight tapered spaces are defined in the barrel of a roll body. Tapered pistons are fitted in the spaces for engagement and disengagement with a bore inner surface defining the tapered spaces. A liquid under pressure is supplied through liquid passages to some of liquid pressure chambers at opposite ends of the tapered pistons so that the barrel of the roll body is increased or decreased in diameter. When the rolling forces are removed from the roll body, the roll body returns to its initial straight state.

Roll for rolling mill

Longitudinal axial positions in a roll longitudinal axis of ring pistons fitted into a profile-variable rolling roll are detected with a higher degree of accuracy. In response to outputs representative of the detected longitudinal axial positions of the ring pistons, the positions of the ring pistons can be controlled with a high degree of accuracy, whereby controllability of shape of the rolling roll is enhanced.

Rolling roll with variable profile and of the tapered piston type

In a sheet rolling mill having work rolls and backup rolls, rolling of flat sheets is facilitated by controlling constant the transverse rigidity or deflection in the direction of width of rolls. The rolling force is detected, and based on the rolling force thus detected, the value for correcting the crown of the work roll is calculated by a transverse rigidity coefficient and a function determined by sheet thickness to control the transverse rigidity.

Method and apparatus for variably controlling transverse rigidity of

A rolling process wherein a pair of working rolls are driven at different peripheral velocities so that the peripheral velocity ratio may be varied, and the peripheral velocity ratio is so controlled that the rolling torque of each of the working rolls may be within a maximum tolerable torque which the working roll may transmit, thereby reducing the rolling force.

Rolling process

A device for blasting descaling slurry jets against the surfaces of sheet metal is disclosed, thereby descaling the same prior to cold rolling.

Mechanical descaling device

A continuous rolling mill capable of rolling a sheet metal under a reduced rolling force without wrapping it around work rolls wherein, at each of rolling stands, the upper and lower work rolls are rotated at different peripheral speeds in such a way that the peripheral speed of one of said pair of rolls which is rotated faster than the other may be substantially equal to the velocity of the metal sheet leaving said pair of rolls while the peripheral speed of said other roll which is rotated slower than said one roll may be substantially equal to the velocity of the metal sheet entering the pair of rolls.

Continuous rolling mill

Disclosed is a hydraulic servomechanism including a control loop consisting of an input device, an adder-amplifier, a servovalve, a cylinder or actuator and a load operatively connected in the order named for controlling the position of the load, a position feedback loop and an acceleration feedback loop. In one embodiment of the invention, the hydraulic servomechanism further includes a feedback loop wherein an output from an accelerometer or pressure sensor for detecting a differential pressure across a piston in the cylinder and an error signal from the adder-amplifier are arithmetically processed and fed back to the adder-amplifier. In another embodiment, the hydraulic servomechanism further includes an additional feedback loop wherein an output from a two-input adder to which are applied a signal representative of a supply pressure of working oil to be delivered from the servovalve to the cylinder and a signal representative of a pressure difference across a piston of the cylinder is arithmetically processed and fed back to a divider inserted between the adder-amplifier and the servovalve. In both embodiments, shocks are substantially eliminated in a hydraulic system.

Hydraulic servomechanism

A rolling mill wherein a pair of upper and lower work rolls are rotated at different peripheral velocities with the peripheral velocity ratio being substantially equal to an elongation ratio at which a sheet metal is rolled, and the tensions exerted to the sheet metal entering and leaving the pair of work rolls are controlled in such a way that the velocity of the sheet metal entering the work rolls may be maintained equal to the peripheral velocity of one of the pair of work rolls which is rotated slower than the other while the velocity of said sheet metal leaving the work rolls may be maintained equal to the peripheral velocity of said the other work roll. Rolling may be accomplished without the need of wrapping the sheet metal around the work rolls, and the rolling pressure may be reduced to a degree comparable RD process.

Rolling mill

A rolling mill capable of rolling a sheet metal into a final product under a low rolling pressure without the need of wrapping the sheet metal around a pair of work rolls. The pair of work rolls are rotated at different peripheral velocities, and the tensions exerted to the sheet metal entering and leaving the pair of work rolls as well as the degree of reduction are so controlled that the ratio of the peripheral velocity of one of the pair of work rolls which is rotated faster than the other work roll to the peripheral velocity of the other work roll may be substantially maintained equal to the elongation ratio of the thickness of the metal sheet entering the pair of work rolls to the thickness of the metal sheet leaving the work rolls.

Growing community of inventors

Yokohama, Japan

Isao Imai