160results about "Tensioning/braking arrangements" patented technology

A rolling mill has roughing, intermediate and finishing roll stands on a first side of a billet reheating furnace, and a breakdown mill on an opposite second side of the furnace. Billets are heated to an elevated rolling temperature in the furnace and are then ejected to the second side of the furnace for rolling in the breakdown mill before being directed back through the furnace for continued rolling into finished products at the first side of the furnace in the roughing, intermediate and finishing roll stands.

An apparatus and method of removing scale from the surfaces of processed sheet metal employs high pressure jets of water directed from nozzles positioned in close proximity to the sheet metal surfaces.

A method of controlling a continuous skin-pass and reduction operation for a metal strip includes the steps of passing a strip through a gap between working rollers of at least two successive rolling stands, only an upstream one of the stands providing substantial thickness reduction of the strip; determining an extension rate of the strip provided by the upstream stand; determining a tension of the strip downstream of the upstream stand; adjusting the speed of the working rollers of the upstream stand compared to the speed of the working rollers of a downstream one of said stands according to the determination of the extension rate; and adjusting the squeezing force of the upstream stand according to the downstream tension determination. A response time to the step of adjustment of the squeezing force is longer than a response time to the step of adjusting the speed of the working rollers.

PCT No. PCT/EP97/05875 Sec. 371 Date Apr. 27, 1999 Sec. 102(e) Date Apr. 27, 1999 PCT Filed Oct. 24, 1997 PCT Pub. No. WO98/19804 PCT Pub. Date May 14, 1998An apparatus for stretch leveling thin metal strips, in particular aluminum strips between 0.1 and 0.5 mm thick, has a group of braking rollers that are interconnected via differential transmissions and controlled jointly with respect to speed to form a first leveling path with a downstream central speed-controlled leveling roller and that downstream a group of pulling rollers connected together by means of differential transmissions and controlled jointly with respect to speed form a second leveling path with the central leveling roller.

A continuous winding machine uses embedded controllers to monitor and control the winding settings in maximum speed applications. Power is supplied to the embedded controllers from a main power source through a rotary transformer. The control system can be operated either through wired connections to a local computer or processor, or through a wireless system, or a combination of both, depending on the specific application. The machine uses a high speed, closed loop tensioning system that includes the filament supply spools and the mandrel supply and takeup spools. The control system menu includes the various winding operations useful to each user. The control system menu can be accessed remotely via computer, or by telephone.

The present invention is to provide a tandem cold rolling method conducted by a tandem cold rolling mill, the number of rolling stands of which is not less than 4, wherein a rolling tension, the intensity of which is not lower than 30%, preferably not lower than 40% of the deformation resistance of material to be rolled, is given at least by the final rolling stand. The present invention is also to provide a tandem cold rolling mill satisfying the inequality of JC>=(0.375{overscore (h)}+0.275)JM, wherein the average thickness of a product sheet on the delivery side of the final rolling mill is {overscore (h)}, and an output of one coiler arranged on the delivery side of the tandem cold rolling mill, or a sum of an output of one coiler on the delivery side and an output of the bridle roller on the delivery side is JC, and an output of the main motor of the final rolling stand of the tandem cold rolling mill is JM.

The invention involves a tension device of tandem rolling system. It includes two guide rollers guiding rolling pieces move, floating roller is equipped between said two guide rollers and supports rolling pieces with constant force and makes the rolling pieces stretching force constant through moving up and down, the rolling pieces between said floating roller and said two guide rollers is vertical. Said floating roller can be connected with a hydraulic means which has constant support force, also can be connected with a counterweight body with constant stretching force through hanger rope. The invention proposes a technology program which ensures rolling pieces stretching force constant in rolling plant through changing storage rolling pieces length in rolling mill plant, has characteristics of simple structure, separately adjustment, fast dynamic response and high control precision, etc, it effectively solves the enormous puzzle and technical difficulty stopping tandem rolling technique development for years and years.

The invention relates to a method for rolling a product in a rolling train comprising at least two roll stands having a roll gap, the product to be rolled comprising a transition region. If a critical transition region crosses the rolling train, the roll gaps of the roll stands are successively opened and closed according to the position of the transition region moving at speed through the rolling train, in the direction of the direction of travel of the conveyor. The opening of the roll gaps occurs parallel to the position of the critical transition region when the product is displaced. A transition region is critical when the structure requires the roll gaps to be opened. The inventive opening of the roll gaps, when the device is moving, enables the controlled transition of a product to be rolled with extreme variations in dimensions and/or hardness, for a shorter length.

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.

A method for measuring and displaying the flatness of a rolled steel sheet is disclosed that includes the steps of measuring tension in the sheet at a plurality of locations on the surface of the sheet and determining a plurality of tension ranges into which the sensed tension level can fall. A color is associated with each of the tension ranges, and a representation of the sheet is produced that is made up of a plurality of regions, each region having a color corresponding to tension range into which the tension sensed at the corresponding location on the surface of the sheet falls. A device for carrying out this method is also disclosed.

The invention discloses a steel pilling-up protective method for a serial type rolling mill, belongs to the technical field of an automatic control method for a rolling mill and aims to provide the steel pilling-up protective method for the serial type rolling mill by which steel pilling-up in the rolling process of a rolled piece can be accurately judged in time, an alarm is given in time, and the rolling mill stops operating. According to the steel pilling-up protective method for the serial type rolling mill, hot metal detection elements are installed at a rolled piece inlet side and a rolled piece outlet side of each rack of the serial type rolling mill respectively and used for detecting whether the end of the rolled piece reaches the current position. When the system judges that the end of the rolled piece enters from the rolled piece inlet side and does not reach the rolled piece outlet side within a preset time, an alarming module is started. The steel pilling-up protective method for the serial type rolling mill is suitable for the serial type rolling mill to roll various rolled pieces, and especially suitable for steel pilling-up protection control over heavy steel rails and other rolled pieces prone to having a steel pilling-up phenomenon in the same class.

A method and device for rapid discharging of metallic plates (21, 22) particularly thick plates, from a rolling mill, to enable secure discharge of relatively short plates (21, 22) from the rolling mill at high velocity and low cycle times by transporting a first plate (21) on a roller bed (9, 13) in the transport direction (T), and preferably the first plate (21) is accelerated in the transport direction (T); depositing the first plate (21) on the roller bed (9, 13); transporting a second plate (22) on the roller bed (9, 13) in the transport direction (T); depositing the second plate (22) in the transport direction before the first plate (21) on the roller bed (9, 13); and discharging the first and the second plates (21, 22) from the roller bed (9, 13) onto a storage (24), wherein the discharging occurs crosswise to the transport direction (T).

The invention fixes a pair of carrying roller on the intake of the rolling machine to lead the mill bar between another pair of roller which is respectively up and down the machine also. With such a device, front of the mill bar can be rolled leaving few disfigurements though using no film on it.

The invention discloses a tension roll group system at entrance of a continuous rolling mill and a control method thereof. The tension roll group system consist of a tension roll, a press roll and an auto control system used for controlling the tension roll group system at the entrance of the continuous rolling mill. The press roll is connected with a power device. The invention changes the press roll of the tension roll into belt drive control and controls the tension roll system through the control method which is to adjust speed and torque of the press roll according to the speed, loop tension and the working status of the equipment at the entrance of a continuous rolling mill, prevent strip from sliding at the tension roll group and protect the surface quality of the strip and the surface of the tension roll, thereby reducing scratching of the strip tail.

The invention provides a method for handling stacked steel due to strip breakage on a rolling mill and is applied to the technical field of production and processing of rolling mills. Strip steel of the rolling mill is wound through a winding component after being rolled out of gaps between working rolls. The handling steps for stacked steel due to strip breakage include that: when steel stacking due to strip breakage occurs to the rolling mill, the gap of each working roll assembly is controlled to clamp stacked steel; the working rolls of the rolling mill are controlled to rotate reversely, and the working rolls which clamp the stacked steel pour back the strip steel in the direction opposite to the rolling direction; and the working roll assemblies drive the stacked steel to quit a steel rolling port to finish handling of the stacked steel due to strip breakage. By means of the method, time for handling strip breakage can be saved, the production efficiency can be improved, the safety of operators and devices in an accident handling process can be guaranteed, and the labor intensity and operating time of the operators can be reduced.

The invention relates to an ultra-thin steel strip coiling tension control method. The technical problem that tension is difficult to control in the ultra-thin steel strip rolling process is solved. The tension control method comprises the following steps that firstly, static tension is established for an uncoiler and a coiler before a steel rolling unit operates; secondly, after the steel rolling unit operates, a tension value of a steel belt is detected, and a detection result is used for adjusting the output torque of a motor of the coiler; and thirdly, in the ultra-thin steel strip rolling process, torque compensation is conducted on the coiler, the tension of the steel strip is made to be constant, and the load torque MZ of the coiler comprises the steel strip tension torque MF, the rotational inertia torque MD, the steel strip bending torque Mw and the transmission system friction torque Mf. According to the technical scheme provided by the invention, strip drawing and strip breakage are avoided in the ultra-thin steel strip coiling process, so that a steel coil can be tightly and neatly coiled, the performance requirement of a product is met, and the production efficiency is also improved.

Disclosed is a rolling mill for copper wire. The rolling width of the mill roller can be automatically and accurately regulated by using the signal from the thickness measurement sensor, so that a copper wire with precise size can be obtained all the time. In addition, the copper wire can be kept tension by means of a plurality of tension regulation device, and then can be winded equably by the precise measure of the thickness of the copper wire.

A wire winding apparatus for winding a wire on a bobbin includes a forming device forming the wire having a rounded cross section to have a polygonal cross section and a winding device winding the wire formed by the forming device on the bobbin.