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| Number | Title | Issue Date |
| 8186195 | Operating method for a multi-stand rolling mill train with strip thickness determination on the basis of the continuity equation A strip is fed a rolling stand of a multi-stand rolling mill with a known inlet thickness and exits with a strip thickness. Measurement parameters are determined that are characteristic of the inlet-side and outlet-side strip velocities. With the measurement paramet... | 05/29/2012 |
| 7296450 | Apparatus and method for production of tapered steel pipe A production apparatus for a tapered steel pipe which holds the two ends of the steel pipe by shafts on carriers and moves it in the axial direction while rotating it to draw it to a taper by an intermediate working roll, wherein the shaft of the working roll is inc... | 11/20/2007 |
| 7225656 | Process for forming a workpiece and rolling machine In the transverse wedge rolling machine as claimed in the invention the drive motor is a permanent magnet motor, especially a torque motor. Furthermore the rotational speed of the rollers is controlled depending on their rotary position. ... | 06/05/2007 |
| 7185519 | Methods and apparatus for monitoring and conditioning strip material Methods and an apparatus for monitoring and conditioning strip material are disclosed. The disclosed methods and apparatus receive encoder signals and sensor data to monitor a condition of a strip material. If an undesired material condition is detected, a material ... | 03/06/2007 |
| 7100411 | Device for reshaping and/or folding bodies of cans A can body is fitted to an inner shaping tool rotatable adjacent a freely rotatable outer shaping tool outside the can body. An arm having an outer end rotatably carrying the outer shaping tool and an inner end is pivotal about its inner end. The inner tool and the ... | 09/05/2006 |
| 6810706 | Apparatus for reducing tension variations in a metal strip The invention provides apparatus and methods for coiling and uncoiling a metal strip in which the angular position of a coiler is measured and an actuator is provided for a moveable roll, the moveable roll position being varied as a function of the coiler. The prese... | 11/02/2004 |
| 6526792 | Method for minimizing thickened ends during the rolling of pipes in a stretch reducing mill The invention relates to a method for minimizing thickened ends during the rolling of tubes in a stretch-reducing mill by means of a change in time of the torque of individual driven roll stands when the tube front end and the tube rear end run through th... | 03/04/2003 |
| 6349585 | Method and arrangement for operating rotating starting shears A method and an arrangement for operating a rotating starting shear operating in a start-stop operation on rolling stock travelling at different speeds in wire mills, light-section mills, medium plate mills and billet mills, wherein the shear, whose gear ... | 02/26/2002 |
| 6311532 | Method and device for reducing or compensating rotational speed losses during insertion or rolling stock in a roll stand Method and device for the reduction and/or compensation of speed drops when threading rolled stock into a roll stand whose rolling speed is controlled with a controller, the controller outputting a predefined supplementary value independently of its input... | 11/06/2001 |
| 6286348 | Strip thickness controller for rolling mill A strip thickness controller for a rolling mill, which is capable of reducing a delivery-side strip thickness deviation due to an eccentricity of a backup roll even in a rolling mill incapable of easily performing a kiss-roll. The strip thickness controll... | 09/11/2001 |
| 6263714 | Periodic gauge deviation compensation system A control system is provided for a rolling mill that feeds sheet material from an unwind reel to a rewind reel, passing it between a pair of work rolls. The control system includes a speed sensor for sensing speed of the sheet material and a sensor for me... | 07/24/2001 |
| 6240756 | Path scheduling method and system for rolling mills A tandem rolling mill (FM) has mill stands (Fi; i=1 to 7) to be controlled in conformity with given rolling conditions (j) to execute a given path schedule for a coil (1) to be rolled by rolls (WR) of the mill stands (Fi) to scheduled thicknesses (hi... | 06/05/2001 |
| 6185967 | Strip threading speed controlling apparatus for tandem rolling mill A strip threading speed controlling apparatus for a tandem rolling mill is constructed to calculate a speed set value of two adjacent rolling stands by using a forward slip predicted considering a back tension without considering a front tension in an ups... | 02/13/2001 |
| 6128934 | Stretch reduction mill A method and apparatus that provides a multiple-stand stretch reduction mill. A single master controller monitors and controls the roll speed at each roll stand in the mill, automatically and simultaneously maintaining each stand's roll speed at a pre-det... | 10/10/2000 |
| 6079242 | Control process for continuous skin pass operation for metal strip 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 su... | 06/27/2000 |
| 5809817 | Optimum strip tension control system for rolling mills A system and method for achieving an optimum interstand strip tension providing substantially equal loading of adjacent stands of a tandem rolling mill where such optimum tension is determined by the expression ##EQU1## where A1 and B1 are, respectiv... | 09/22/1998 |
| 5806357 | System and method for rolling tapered slabs A method and a device are provided for rolling a slab, in particular a slab whose thickness varies over its length, using at least two roll stands with a substantially constant and preferably low tension being maintained in the slab between the first and ... | 09/15/1998 |
| 5520037 | Roll stand adjusting method Rolling schedule computing method for adjusting the desired roll force and desired roll gap of a roll stand, in which before rolling a strip (1) of a prescribed quality from an expected material hardness (MH*) and before a relative desired pass reduction ... | 05/28/1996 |
| 5103662 | Tandem rolling mill tension control with speed ratio error discrimination A method is provided for controlling interstand tension by roll gap adjustment to reduce gage variations caused by unplanned rolling velocity changes wherein a signal proportional to the tension changes produced by deviations from the desired speed ratio ... | 04/14/1992 |
| 5085065 | Universal roll stand and method of operating same A workpiece is advanced through a succession of universal roll stands each having a pair of rotatably positively driven horizontal rolls engaging horizontal surfaces of the workpiece and a pair of idling vertical rolls engaging vertical surfaces of the wo... | 02/04/1992 |
| 5040395 | Looper control system for continuous rolling mill There is disclosed a looper control system for a continuous rolling mill comprising: a section for performing the integral operation of respective deviations between measured values and target values with respect to the tension and the looper angle, and t... | 08/20/1991 |
| 4907433 | Apparatus and method for adaptive control of a rolling mill The method of controlling a velocity dependent factor of strip material being processed in a mill includes the steps of simultaneously determining the apparent velocity of material prior to, between and subsequent to spaced apart work rolls. Input slip is... | 03/13/1990 |
| 4850211 | Method of controlling elimination of roll eccentricity in rolling mill and device for carrying out the method A rolling load signal is detected during a few rotations of a top and a bottom backup roll at different detection time points at which the top and bottom backup rolls are out of phase from each other and then are analyzed by Fourier analysis so as to dete... | 07/25/1989 |
| 4843854 | Rolling mill roll eccentricity control The invention relates to the control of rolling mill backup roll eccentricity by combining the load carrying characteristics of rolling mill tapered roller bearing assemblies during rolling with prescribed levels of axial thrust to effect a controlled def... | 07/04/1989 |
| 4831854 | Steel strip descaler The rolling mill for mechanical descaling of hot rolled steel is constructed according to the slidable roll process with reducing rolls so that a unform operation with different and/or changing shape steel strips can obtained. This is attained when the ro... | 05/23/1989 |
| 4771621 | Speed control apparatus for equipment for continuous processing of steel plates Speed differential is detected between the entrance side and exit side of a looper, which is provided either on the feed side or on the delivery side of a central processing unit in continuous processing equipment and operates as a continuously supplying ... | 09/20/1988 |
| 4763273 | Apparatus for detecting eccentricity of roll in rolling mill An apparatus for detecting a roll eccentricity in a rolling mill includes mark pulse generators each provided for upper and lower rolls from which an eccentricity is to be detected, the mark pulse generator generating one pulse per one rotation of the rol... | 08/09/1988 |
| 4706479 | Tandem rolling control system A system for controlling interstand tension of a tandem rolling mill includes a detector for directly detecting a travelling speed of a work between two neighboring stands. A value of a speed of the work thus obtained is processed by a tandem rolling cont... | 11/17/1987 |
| 4665729 | Thickness control method and system for a single-stand/multi-pass rolling mill In a method and system for controlling a final thickness of a strip material being rolled in a single-stand/multi-pass rolling mill having an adjustable main parameter affecting the final thickness and one or more auxiliary parameters affecting an interme... | 05/19/1987 |
| 4656855 | Crown control method for a multi-roll rolling mill A method is set forth for use in crown control in a multi-roll rolling mill, the method including the steps of: setting in advance a shape of a thermal crown of a work roll corresponding to various rolling conditions and a changing gradient of a mechanica... | 04/14/1987 |
| 4633694 | Automatic control on strip continuous processing lines Gradual acceleration/deceleration of continuous strip processing lines is achieved by suspending manual selected acceleration/deceleration control in favor of predetermined low acceleration/deceleration rates when the line speed is below a pre-established... | 01/06/1987 |
| 4625536 | Method of controlling unequal circumferential speed rolling A set-up method for unequal speed circumferential rolling. The setting values of the circumferential speeds of a higher speed roll and a lower speed roll and the roll position are obtained by using, as rolling parameters in a rolling schedule, the inlet a... | 12/02/1986 |
| 4521859 | Method of improved gage control in metal rolling mills In a metal rolling mill of the type employing automatic gage control (AGC) to control the gap between the rolls utilized to reduce the thickness or gage of a workpiece passed between the rolls, there is provided a method for compensating for roll irregula... | 06/04/1985 |
| 4512169 | Automatic plate thickness control device A thickness control device and method for maintaining the thickness of the rolled material which is passed between the rollers of a rolling mill, in which the rollers above and below the rolling material are rotated at different speeds VH and V... | 04/23/1985 |
| 4471639 | Roll orientation control system for straightening machines Angular orientation of a straightener machine roll relative to the vertical axis thereof is achieved through the use of a pair of single acting hydraulic actuators imposing force against a roll support member on laterally opposite sides of a vertical plan... | 09/18/1984 |
| 4365496 | Rolling process 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 ma... | 12/28/1982 |
| 4255954 | Device for controlling shape of strip or sheet being rolled A device for controlling the shape of the strip or sheet being rolled comprises at least two sets of rollers positioned in pairs on both sides of the strip or sheet across the width thereof and incorporating speed actuators for tensioning said strip of sh... | 03/17/1981 |
| 4159572 | Dynamic gage averaging and length determining device and method for continuous sheet material Method and apparatus for dynamically determining average gage of continuous sheet material passing about a work roll for subsequent winding or coiling upon a take-up reel. The apparatus includes pulse tachometers for both the work roll, of known diameter,... | 07/03/1979 |
| 4145901 | Rolling mill 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 th... | 03/27/1979 |
| 4134283 | Strip-processing lines with cold-rolling stands A strip-processing line for the continuous after-rolling of metal strip between a pair of bridles. According to the invention the drive motors of the upper and lower cold-rolling rollers are hydraulically driven, the rollers are controlled by the speed of... | 01/16/1979 |
