Ishikawajima-harima Heavy Industries Co., Ltd.

Castrip, LLC

Other

Ishikawajima-harima Jukogyo Kabushiki Kaisha

Kawasaki Steel Corportion

Hiroaki Kuwano

Hideyuki Nikaido

Hisahiko Fukase

Heiji Kato

Nobuhiro Tazoe

Hisashi Sato

John Albert Ziegelaar

Toshio Imazeki

Brett Gray

Taichi Kukizaki

Kiyoshi Ueda

Makoto Shitomi

Shinji Tanaka

Katsumi Okada

Katsumi Kawakami

Tetsuo Shima

Kouji Shirakawa

Takeshi Fujitsu

Hiroshi Takase

Toshirou Matsushita

Strip material is fed to a reduction rolling mill by a steering device in the form of a pinch roll stand comprising pinch rolls to which strip gripping forces are applied by hydraulic cylinder units located at the ends of the pinch rolls. A reduction mill is similarly provided with a pair of hydraulic cylinder units which are independently operable to vary the pressure applied by the reduction rolls across the strip. Sensors sense the position of the strip at a first location in advance of the pinch rolls and a second location in advance of the rolling mill. This output of sensors is fed to a controller which controls operation of both sets of hydraulic cylinder units to steer the strip.

Method and apparatus for steering strip material

A control unit of hydraulic pinch rolls comprises: position detectors that detect position of right and left cylinder pistons ; an arithmetical unit that calculates a difference of output from the position detectors; a controller that processes a calculated value to make correction output; and add-subtract units that add/subtract the correction output from the controller such that the correction output is added to an end portion of the pinch rolls having a wider gap in a direction to push the gap and the correction output of the same amount is subtracted from the opposite end portion, by which the set values of pressing force control provided for right and left independently are corrected. Thus, a defective winding shape can be suppressed.

Control method of hydraulic pinch roll and control unit thereof

A pinch roll assembly that may be used for feeding hot metal strip comprises a pair of parallel pinch rolls. At least one of the rolls comprises a copper or copper alloy tube providing the external peripheral roll surface and internal water cooling passages to cool the cylindrical tube by flowing water through the passages. The copper or copper alloy tube is fitted to a cylindrical arbor formed with end shafts for mounting the roll in journal bearings. Shaft is provided with a rotary drive coupling and shaft is fitted with a rotary water coupling for flow of cooling water to the water flow passages.

Feeding strip material

A take-up equipment and a take-up method for a finish rolling mill for dividing a strip into a plurality of coiled products when taking up the strip on the exit side of the finish rolling mill are provided. A plurality of take-up machines (,K,, K,) are disposed at the downstream side of a hot finish rolling mill; a shearing machine (,) is provided on the upstream side of a pinch roll (,) of the take-up machines (,K,) at the uppermost stream end; and a strip passing device (,) is provided between the shearing machine and the pinch roll at the uppermost stream to prevent a strip from rising. The strip passing devices are guiding devices for restricting the height of the rise of the strip or the airflow suction type strip passing devices for drawing in a strip under suction using airflow. The plurality of take-up machines are down coilers or carousel type reels having two winding drums (,).

Hot rolled material take-up equipment and take-up method

A guiding method and apparatus are presented for preventing the generation of lateral curving in a rolled slab produced in a roughing mill train, consisting of an edging mill and a horizontal mill in tandem, for example. The apparatus basically includes a first side guide placed upstream at the entrance to the edging mill, a second side guide placed downstream at the exit of the horizontal mill and a third side guide placed between the edging mill and the horizontal mill. The first side guide at the entrance to the edging mill synchronously closes the separation distance of the guide components upon the entry of the rolled slab into the first side guide, leaving a narrow space between the guide and the rolled slab. The third side guide closes the separation spacing based on slab exit timing representing the instant the tail end of the rolled slab passes through the edging mill. The second side guide assumes a narrow separation distance when the head end of the rolled slab enters therebetween. The restraining force provided by the narrow separation distance prevents lateral shifting to occur during the rolling process thereby reducing snaking of the rolled slab.

Guiding apparatus for roughing mill

A tension controller is disposed on an entry side or both on entry and exit sides of a rolling mill to quickly suppress tension fluctuation due to change of roll gap.

Thickness control system for rolling mill

Growing community of inventors

Yokosuka, Japan

Hiroaki Kuwano