摘要:
The invention relates to a device for lateral guidance of a rolled strip transported on a roller bed, particularly a hot rolled strip in front of a winding device (3), having parallel first and second side guides provided on both sides of the rolled strip, said side guides being movable toward or away from one another by adjusting means that are adjustable independently of one another; the invention is characterized in that a control device (14, 15, 16), to which operating forces and/or positions of the side guides and/or of the rolled strip can be fed as output values in the guidance of the rolled strip, is provided for damping the periodic deviation of the rolled strip, and in that the control device (14, 15, 16) controls the positions of the side guides and/or forces that the side guides exert on the rolled strip based on the measured output values.
摘要:
The invention relates to a Steckel hot rolling mill comprising at least one reversing roll stand (1) as well as coilers (6,7) which are positioned upstream and downstream and present torque-controlled drives. The aim of the invention is to improve such a hot rolling mill in such a way that it optimally counteracts variations in tension and/or mass flow caused by changes in process parameters and allows for high quality hot rolling, especially of very thin hot rolled strips. To this end the invention provides for a looper (8,9) to be positioned between both the coilers (6,7) and the reversible roll stand (1), which supplies actual values for adjusting tension and mass flow.
摘要:
A method for improving the running-out of a metal rolled strip (1), the rolled trailing strip end (1a) of which exits out of a respectively last roll stand (2) of a multistand rolling mill (3) at a rolling speed, wherein during rolling between two consecutive roll stands (F1, F2, F3 . . . Fn) the strip tension (a) is adjusted to stabilize the strip position, provides that shortly before the rolled trailing strip end (1a) exits the developing rolling force differences are measured separately for each roll stand (F1, F2, F3 . . . Fn), that from this the pivot value (16) and the pivot direction are derived for forming a corrective value for the adjustment of the rolls (10, 11) and that the adjustment is corrected.
摘要:
The invention relates to a device for lateral guidance of a rolled strip transported on a roller bed, particularly a hot rolled strip in front of a winding device (3), having parallel first and second side guides provided on both sides of the rolled strip, said side guides being movable toward or away from one another by adjusting means that are adjustable independently of one another; the invention is characterized in that a control device (14, 15, 16), to which operating forces and/or positions of the side guides and/or of the rolled strip can be fed as output values in the guidance of the rolled strip, is provided for damping the periodic deviation of the rolled strip, and in that the control device (14, 15, 16) controls the positions of the side guides and/or forces that the side guides exert on the rolled strip based on the measured output values.
摘要:
A method for improving the running-out of a metal rolled strip (1), the rolled trailing strip end (1a) of which exits out of a respectively last roll stand (2) of a multistand rolling mill (3) at a rolling speed, wherein during rolling between two consecutive roll stands (F1, F2, F3 . . . Fn) the strip tension (a) is adjusted to stabilize the strip position, provides that shortly before the rolled trailing strip end (1a) exits the developing rolling force differences are measured separately for each roll stand (F1, F2, F3 . . . Fn), that from this the pivot value (16) and the pivot direction are derived for forming a corrective value for the adjustment of the rolls (10, 11) and that the adjustment is corrected.
摘要:
The invention relates to a device (1) for measuring the width (B) and/or the position of a metal strip (2) or a slab, which has at least two measuring systems (3, 4), with each located on a side (5, 6) of the metal strip (2) or the slab, wherein each measuring system (3, 4) has a sensor (7) designed to detect the lateral end (8, 9) of the metal strip (2). To make the measuring device robust and to enable dynamic measurement, according to the invention the sensor (7) is located on a moving element (10) with which it can be moved in a straight line in a direction (Q) at right angles to the longitudinal direction (L) of the metal strip (2).
摘要:
The invention relates to a method for calibrating a rolling stand (3), wherein in order to determine the relative pivot position of the roller set for setting a symmetrical roll gap and/or for determining the extension of the rolling stand (3) before the actual rolling process, the roller set is pressed against each other under a radial preset force and the resulting deformation of the rolling stand is preferably measured on the piston-cylinder unit (6, 7). The pivot position of the roller set and/or the frame module (M) determined based thereon are mathematically used during the subsequent rolling of a rolling stock between the working rollers (1, 2) for adjusting the roller set. In order to attain a higher accuracy during rolling, the invention provides for the working rollers (1, 2) to be axially adjustable relative to each other starting from a zero position that is not axially displaced, wherein the determination of the pivot position for setting a symmetrical roll gap and/or the determination of the frame module (M) are carried out in a relative displacement position of the working rollers (1, 2) that is not equal to the zero position (calibration position), wherein the determined pivot position and/or the value for the frame module (M) are stored and mathematically used for further calculating the pivot position and/or the adjustment of the roller set during rolling of the rolling stock.
摘要:
The invention relates to a cooling device (100) for cooling a metal strip (200) after a forming in a cold rolling stand (200) having at least one nozzle (112) for spraying a cooling medium (400) onto the surface of the metal strip (200). In order to make such known cooling device more effective and efficient, it is proposed according to the invention to provide a plate (500), which in an operating position is arranged parallel to the surface of the metal strip (200) in the run-out of the cold rolling stand (300) and to arrange the nozzle in the operation position in such a manner that the cooling medium is sprayed at an acute spray angle α into a cavity between the surface of the metal strip and the opposing plate, with a spray direction (R) opposite to the running direction (L) of the metal strip.
摘要:
The invention relates to a method for the hot dip coating of a metal strip (1), in particular a steel strip, according to which the metal strip (1) is fed vertically through a container (3) that holds the molten coating metal (2) and a guide channel (4) that is connected upstream. According to the invention, to retain the coating metal (2) in the container (3) in the vicinity of the guide channel (4), an electromagnetic field is generated by means of at least two inductors (5) that are situated on either side of the metal strip (1) and to stabilise the metal strip (1) in a central position in the guide channel (4), the electromagnetic excitation of the inductors (5) is modified and/or an electromagnetic field that overlaps the electromagnetic field of the inductors (5) is generated by means of at least two correction coils (6) that are situated on either side of the metal strip (1). The aim of the invention is to control the centring of the metal strip in a manner that is not susceptible to interference. To achieve this, the stabilisation of the central position of the metal strip (1) in the guide channel (4) takes place in a closed-loop control circuit by the sequence of the following steps: a) measurement of the force (FH) that acts in a horizontal direction and that the metal strip (1) exerts on a force measuring element (7) when it leaves the central position; b) the induction current (II) in the inductors (5) and/or on the induction current (II) in the correction coils (6) is influenced in accordance with the measured force (FH), in order to hold the metal strip (1) in a central position in the guide channel (4). The invention also relates to a device for the hot dip coating of a metal strip.
摘要:
When rolling hot-rolled strips, different draughts per pass might occur during the rolling operation over the length of the roll gap, due to changes in the hardness of the rolling stock, to the roll gap itself or to the geometry of the incoming rolling stock. These different draughts per pass lead to lateral deviations and shifts of the rolling stock in the roll stand and to a lateral bending of the outgoing hot-rolled strip. In order to avoid these defects by intentionally influencing the geometry of the rough-rolled strip, it is proposed to interconnect in at least one roughing-down stand a dynamic positioning in the roughing-down stock (1) with fast and powerful lateral guides (8,9) arranged before and after the roughing-down stand (1), by corresponding regulation operations, in such a way that a grainy or tapering bloom (4) is shaped into a straight and taper-free roughed-down strip (5) in one or more passes, in continuous or reciprocating operation.