Abstract:
A refractory metal plate is provided. The plate has a center, a thickness, an edge, a top surface and a bottom surface, and has a crystallographic texture (as characterized by through thickness gradient, banding severity; and variation across the plate, for each of the texture components 100//ND and 111//ND, which is substantially uniform throughout the plate.
Abstract:
A contactless looper for a metal substrate includes an entrance, an exit, and at least one deflection device between the entrance and the exit. The contactless looper is configured to receive a metal substrate moving in a processing direction from the entrance to the exit and impart a deflection along the processing direction in a metal substrate such that a position of the metal substrate at the at least one deflection device is vertically offset from a height of the metal substrate at the entrance of the looper. A method of processing a metal substrate with the contactless looper includes receiving the metal substrate at the entrance of the contactless looper along a passline, imparting a deflection in the metal substrate with the looper, and passing the metal substrate out the exit of the contactless looper.
Abstract:
The present invention provides a method of controlling the height of a looper in an inter-stand section of a hot strip mill that overcomes the problem of looper instability due to looper inertia without the need for the controller of upstream rollers to have a reduced gain. The inter-stand section of the hot strip mill comprises a pair of upstream rollers driven by a main motor and a looper driven by a looper motor. The method comprises the steps of: calculating a desired speed trim to be applied by the main motor; estimating the inertia of the looper; calculating a torque necessary to overcome the inertia of the looper from the speed trim, the estimated inertia of the looper and a sensitivity calculated from the geometry of the looper; and controlling the main motor to apply the speed trim to the upstream rollers and controlling the looper motor to apply the calculated torque to the looper.
Abstract:
The present invention relates to a production method for a hot rolled strip in a hot rolling line. An object of the present invention is to ensure stable running of a hot rolled strip on a hot runout table, and to prevent excessive displacement of the hot rolled strip above a pass line, and, for example, a head folding defect and a tail folding defect resulting from the displacement. In the method of the present invention, a fluid jet is squirted above a hot rolled strip conveyed by a hot runout table so as to pass over the hot rolled strip running without touching a surface of the hot rolled strip running on a pass line (a strip-conveying surface of the hot runout table). A strip portion displaced upward from the pass line beyond a predetermined level collides with the fluid jet, and the displacement of the strip portion is thereby corrected. Since the fluid jet passes over the normally running hot rolled strip without touching therewith, the strip portion is properly prevented from being displaced by squirting the fluid jet.
Abstract:
The present invention relates to a production method for a hot rolled strip in a hot rolling line. An object of the present invention is to ensure stable running of a hot rolled strip on a hot runout table, and to prevent excessive displacement of the hot rolled strip above a pass line, and, for example, a head folding defect and a tail folding defect resulting from the displacement. In the method of the present invention, a fluid jet is squirted above a hot rolled strip conveyed by a hot runout table so as to pass over the hot rolled strip running without touching a surface of the hot rolled strip running on a pass line (a strip-conveying surface of the hot runout table). A strip portion displaced upward from the pass line beyond a predetermined level collides with the fluid jet, and the displacement of the strip portion is thereby corrected. Since the fluid jet passes over the normally running hot rolled strip without touching therewith, the strip portion is properly prevented from being displaced by squirting the fluid jet.
Abstract:
An apparatus and a method for influencing the frictional conditions between an upper roll and a lower roll of a roll stand of a hot-rolling train for wide strip or a cold-rolling train for strip. The apparatus includes a spraying device arranged at the entry side of the roll stand for spraying a defined quantity of liquid in the direction of the roll gap and a control device for determining the quantity and discharge of this liquid, wherein used as a control variable is a predetermined or also computed variable in connection with the actual roll torque of the lower roll or/and the upper roll.
Abstract:
Apparatus to control and adjust the drawing action in a rolling mill provided with rolling stands through which a product passes. A video monitoring system acquires frames of the product; a processing system that processes the frames and defines a normal rolling range within which the product being rolled must be positioned; identifies the position of the product and its geometric characteristics; and identifies a possible variation of the position of the product being rolled over time based on the analysis of the sequence of frames acquired. An automation system is associated with the rolling mill, configured to receive data relating to the position of the product to determine the continuation of the rolling if the product is correctly positioned in the range, or a variation of the rolling parameters if the position of the product being rolled is able to generate a cobble which is outside of the range.
Abstract:
A refractory metal plate is provided. The plate has a center, a thickness, an edge, a top surface and a bottom surface, and has a crystallographic texture (as characterized by through thickness gradient, banding severity; and variation across the plate, for each of the texture components 100//ND and 111//ND, which is substantially uniform throughout the plate.
Abstract:
The present invention provides a method of controlling the height of a looper in an inter-stand section of a hot strip mill that overcomes the problem of looper instability due to looper inertia without the need for the controller of upstream rollers to have a reduced gain. The inter-stand section of the hot strip mill comprises a pair of upstream rollers driven by a main motor and a looper driven by a looper motor. The method comprises the steps of: calculating a desired speed trim to be applied by the main motor; estimating the inertia of the looper; calculating a torque necessary to overcome the inertia of the looper from the speed trim, the estimated inertia of the looper and a sensitivity calculated from the geometry of the looper; and controlling the main motor to apply the speed trim to the upstream rollers and controlling the looper motor to apply the calculated torque to the looper.