JP5598811B2 - Rolled material tension control device and rolled material tension control method - Google Patents

Description

  The present invention relates to a rolled material tension control device and a rolled material tension control method used when rolling a rolled material.

  In the cold rolling system, a rolling material tension control device called a looper that is electrically, electrically, or hydraulically driven is provided on the inlet side and the outlet side of the rolling mill with the rolling mill interposed therebetween.

  In a hot continuous rolling system, a rolling material tension control device is provided between a rolling stand and a rolling stand.

  By providing these rolled material tension control devices, a desired tension is always applied to the rolled material, and control is performed to keep the speed of the rolling mill constant.

  In these rolling material tension control devices, the tension of the rolling material that passes is measured by a tension measuring device, and the tension of the rolling material is adjusted based on the tension value.

  Patent Document 1 describes a tension measuring device in which a measuring roller is supported on a free end of a one-armed support lever that can swing around a stationary bearing.

  In Patent Document 2, a tension measuring device includes a contact roller that makes contact with a rolled material, a load sensor that detects a load applied to the rolled material by the contact roller, and an elevating unit that moves the contact roller up and down. Examples are described.

  Patent Document 3 describes that the tension of a rolled material is increased using a pair of fixed rollers and a movable roller, and using strip storage and driving means.

  Patent Document 4 describes a tension adjusting device including two fixed rolls and one movable roll.

Japanese Patent Publication No. 7-63746 JP-A-6-114425 JP 2004-344974 A JP 2009-95848 A

  In a conventional tension measuring device, a configuration is adopted in which a single abutting roller that swings or linearly moves in a vertical direction abuts on the rolled material.

  When using a contact roller that moves the contact roller in the vertical direction, the roll wrap angle of the rolled material continuously varies with the vertical movement of the contact roller. In addition to the need to correct the tension detection value, there is a problem in terms of accuracy in the tension detection value detected in such a transient state.

  On the other hand, when one abutting roller swings and abuts against the rolled material, the problem of correction due to the roll wrap angle of the rolled material is eliminated, but the weight of the rolled material is applied to the abutting roller as a load. In addition, it is necessary to perform correction based on load fluctuations on the tension detection value, and the tension detection value detected in such a transient state has a problem in terms of accuracy.

  In view of such points, the present invention solves the problem in the case of detecting in a transient state such as the roll winding angle of the rolled material and the load fluctuation of the rolled material, and improves the measurement accuracy to achieve a desired constant tension with high accuracy. The purpose is to control.

The present invention relates to a rolled material that is arranged on the inlet side of the rolling stand or the outlet side of the rolling stand, and that controls the rolling material's speed by controlling the speed of the rolled material by a driving machine based on the tension value of the rolled material. In the tension control device,
A drive for controlling the speed of the rolled material;
A rotating shaft connected to another drive machine and rotated;
A dancer arm that is fixed to the rotary shaft and that has a symmetrical shape about the rotary shaft and swings about the rotary shaft, and a symmetrical position of the dancer arm that has the same shape and that is centered on the rotary shaft A swing dancer provided with a pair of dancer rolls arranged at each free end and rolled around the rolled material in an S shape or an inverted S shape,
A swing angle measuring means attached to the rotating shaft,
When the plate length of the rolled material changes, the sag of the rolled material is measured by responding to the change in the swing angle, and rolling is performed by the driving force of the speed control drive machine corresponding to the sag. There is provided a rolled material tension control device characterized in that a plate length of a material is controlled and a swinging motion of the swing dancer about the rotation axis is controlled.

  The present invention also provides a rolled material tension control device, wherein the electric motor for speed control of the rolled material controls the unwinding speed or the winding speed of the rolled material, or the rolling speed.

  In the present invention, the rolling material tension control device may be provided between the rolling stand inlet side and the rolling mill unwinder, and between the rolling stand outlet side and the rolling material winder, or between the rolling stands. Provided is a rolling mill system that is arranged.

The present invention is provided between the entrance side of the rolling stand and the rolled material unwinder, or between the exit side of the rolling stand and the rolled material winder, and by controlling the speed of the motor, the rolled material The tension control of
An electric motor for controlling the speed of the rolled material, a rotating shaft connected to another electric motor and rotated,
Each of the dancer arms fixed to the rotation shaft, having a symmetrical shape about the rotation axis and swinging about the rotation axis, and having the same shape, each of the dancer arms centered on the rotation axis In a rolling material tension control method by a rolling material tension control device comprising a swing dancer provided with a pair of dancer rolls arranged at the end and rolled material is wound in an S shape or an inverted S shape,
When the length of the rolled material changes, the amount of slack in the rolled material is measured by responding to the change in the swing angle, and a driving force corresponding to the amount of slack is given to the electric motor for speed control. Then, the electric motor performs speed control of the rolled material so that constant tension control of the rolled material is performed, and swing motion about the rotation axis of the swing dancer is controlled.
A rolling material tension control method is provided.

  As described above, the present invention has the same shape, and a roll is provided at each free end at the target position of the support member around the rotating shaft, and the rolled material is S-shaped or inverted S-shaped. Since the swing dancer is designed to be wound around, the problem of detecting in the transient state of the rolled material roll winding angle and the rolled material load fluctuation is solved, and the fluctuation of the rolled material length That is, it is possible to provide a rolled material tension control device and a rolled material tension control method capable of performing desired constant tension control with high accuracy by improving the measurement accuracy of tension.

The figure which shows the outline of the rolling mill system which is an Example of this invention. The figure which shows the structure of the rolling-material tension | tensile_strength control apparatus which is an Example of this invention. The side view of a figure. The figure which shows a rocking | fluctuation state.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a schematic configuration of a rolling mill system according to an embodiment of the present invention.

  In FIG. 1, a rolling mill system includes a rolling mill 1, a rolling material unwinding machine 2 before rolling, a rolling material winding machine 3 after rolling, an inlet side of the rolling mill 1, for example, a rolling mill 1 and an unwinding machine. 2, a swing dancer 4 that swings and swings in accordance with the amount of slack generated when the length of the rolled material is increased, and the exit side of the rolling mill 1, for example, the rolling mill 1. The rolling material tension control device 100 provided with a rolling material swinging dancer 4A disposed between the winding machine 3 and the winding machine 3 is a rolling machine 5 that is unrolled from the unwinding machine 2. 1 is passed through, rolled into a desired shape, and finally taken up by a winder 3. A guide roll 6 is appropriately provided between the unwinder 2 and the winder 3. In the case of reverse rolling for rewinding, the unwinder becomes a winder and the winder becomes an unwinder. Winders and unwinders are sometimes called unwinders. Each of the unwinder 2 and the winder 3 is a speed control drive machine (for example, a drive machine driven by electric, air, or hydraulic pressure. In this example, an electric motor. Hereinafter, the electric motor will be described as an example). Is connected.

  The plate length variation of the rolled material 5 conveyed between the unwinding machine 2 and the rolling mill 1 is measured by the sag measuring means 7 described in detail later provided in the swing dancer 4 and corresponds to the size of the sag. The speed of the electric motor 8 which is an electric motor is controlled. Therefore, the measurement of the size of the sag and the measurement of the length variation of the rolled material are synonymous. The speed of the rolled material is controlled in accordance with the speed control of the electric motor 8, and the speed of the rolled material is controlled, whereby the tension of the rolled material is controlled to be constant on both the inlet side and the outlet side. In addition to the sag control by the electric motor 8, that is, the length control of the rolling mill, speed control by the electric motors 12 and 13 connected to the rolling mill may be performed corresponding to the obtained sag signal.

  “Sag” appears as a large amount of tension. Therefore, here, the sag can be read as the tension, and the measurement of the sag is synonymous with the tension measurement. In addition, the measurement here includes a case where the measurement value appears in a numerical value and a case where the measurement value is not converted into a numerical value, and includes both correspondence to a physical and mechanical position.

  The swing dancer 4A disposed on the exit side of the rolling mill 1 constituting the rolling system has the same configuration as the swing dancer 4 and performs the same function. The description of the dancer 4A is incorporated, and the swing dancer 4A is referred to as necessary. Note that each configuration of the swing dancer 4 </ b> A is given “A” corresponding to the configuration of the swing dancer 4.

  The rolling mill 1 constituting the rolling system includes a pair of rolling rolls 9, a rolling stand 10 that accommodates the pair of rolling rolls 9, and a driving device (not shown), as is generally well known. The rolling roll 9 may be provided with an intermediate roll and further a backup roll such as a reinforcing roll, but the configuration of the rolling mill 1 is well known and will not be further described.

  2 and 3 show details of the swing dancer 4, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof.

  In these drawings, as described above, the swing dancer 4 swings in response to the slack formed by the potentiometer and may be described as a slack swinging device 7 (hereinafter, potentiometer 7) that swings. ). Further, the swing dancer 4 is directly connected to the electric motor 11.

  The swing dancer 4 is fixed to the rotating shaft 15 and both sides of the rotating shaft 15, has a symmetrical shape around the rotating shaft 15, and rotates within a certain range around the rotating shaft 15, that is, swinging motion. The dancer arms (support members) 18 and 19 have the same shape and are arranged at the free ends 20 and 21 at the symmetrical positions of the dancer arms 18 and 19 around the rotation shaft 15 that is a fixed shaft. A pair of dancer rolls 16 and 17 are provided. The swing dancer 4 vibrates by a rotational motion around the center, and swings to show a behavior as if dancing. The dancer arms 18 and 19 have a rhombus shape with a narrow free end as shown in the figure. The shape of the dancer arms 18, 18 </ b> A is not limited to a rhombus, but may be a rectangular shape or other shapes, and may be a shape that fixes a pair of dancer rolls and can be rotated at the center. Here, it swings symmetrically up and down around the central axis. And this rocking | fluctuation is characterized by rocking | fluctuating symmetrically up and down centering on the rotating shaft 15. FIG. The dancer arm and dancer roll can be read as the swing arm and swing roll, respectively.

  The rolled material 5 is wound around a pair of dancer rolls 16 and 17 in an S shape or an inverted S shape.

  A rolling building (not shown) is provided with a pedestal 21, and a tip bracket 22 is placed on the left side of the pedestal 21, and a drive unit pedestal 23 is placed on the right side. A support member 24 is attached to the distal end bracket 22, and another support member 25 is attached on the drive unit base 23.

  The rotary shaft 15 is attached to and held by the support members 24 and 25 with a bearing (not shown) interposed therebetween. Accordingly, the dancer arms 18 and 19 are interposed between the main components of the rotary shaft 15 and the support members 24 and 25 on both sides of the rotary shaft 15.

  The dancer arms 18 and 19 are configured to be fixed to the rotary shaft 15 at the center and to support the dancer rolls 16 and 17 on the free ends 20 and 21 via bearings (not shown). As a center, the dancer rolls 16 and 17 can swing vertically in a direction perpendicular to the longitudinal direction of the dancer rolls 16 and 17. That is, the swing dancer 4 swings around the rotation axis.

  In addition to the support member 25 described above, a pair of clutch brackets 27 and an electric motor frame 28 are mounted and attached on the upper side of the drive unit frame 23. The electric motor 8 is mounted on the electric motor base 28. The rotating shaft of the electric motor 8 rotates at a constant speed in one direction. On the right side of the rotation shaft 15 and on the right side of the support member 25, a potentiometer attachment 29 for attaching the potentiometer 7 is attached to the extension 31 of the rotation shaft 15. In this way, the potentiometer 7 is attached to the swing dancer 4 as a slack swinging device via the rotary shaft 15 and can rotate according to the swing angle of the dancer rolls 16, 17. It functions as a moving angle measuring means (swing angle detector). The potentiometer 7 extracts the swing angle as a swing angle signal.

  Since the rolled material 5 is wound around the pair of dancer rolls 16 and 17 in an S shape or an inverted S shape as described above, the weight associated with the mass of the rolled material acting on the rolled material 5. The action is canceled by a pair of upper and lower dancer rolls 16 and 17 that rotate about a central central axis, and the swing angle excluding the weight action is measured by the potentiometer 7. The roll winding angle of the rolled material becomes substantially constant due to the S-shaped or reverse S-shaped winding, and it is not particularly necessary to perform correction associated with fluctuations in the winding angle.

  A clutch 30 is attached to the extension 31 of the rotary shaft 15 between the pair of clutch brackets 27. The clutch 30 generates a tension that controls the rotational torque of the swing dancer 4. The winding tension is set by this control. By using a powder clutch as the clutch, it becomes possible to slip 100%. The extension 31 of the rotating shaft 15 and the rotating shaft 32 of the electric motor 11 are coupled by a coupling 33. A pulling force is applied to the rolled material 5 by the rotational force of the electric motor 11, and the swing associated with the swing of the rotating shaft 15 appears as the swing angle of the dancer arms 18 and 18A.

  In the configuration described above, if the rolling length of the rolling material 5 varies due to rolling in the rolling mill 1 or due to the unwinding machine 2, the winding machine 3, and other causes, the varying plate length 4, the pair of dancer rolls 16 and 17 are rotated and oscillated around the rotating shaft 15 in the clockwise direction and the counterclockwise direction by the action of the electric motor 11 of constant rotation, as shown in FIG.

  In this embodiment, the maximum swing angle is set to ± 40 °. The potentiometer 7 rotates and swings together with the rotary shaft 15 corresponding to the swing angle, and generates an accurate angle signal corresponding to the swing angle. This angle signal is associated with the sag tension value, and the angle signal is output as a sag value and a sag signal. The maximum swing angle can be appropriately determined in the vicinity of 40 °. The same applies to the swing dancer 4A.

  The detected sag magnitude signal is used as a control signal for a rotation control device (not shown) of the electric motor 8, and the driving force of the electric motor 8 is sent to the unwinder 2 and / or the winder 3 in response to this control signal. Each is given to control the unwinding speed and the winding speed. As a result, the swing motion of the slack and the swing dancers 4 and 4A is controlled.

  For example, if the tension becomes smaller than a predetermined tension and a large amount of sag is generated, and swings in the clockwise direction, that is, in the direction of the winder 3 in FIG. 3, the sag is decreased and the tension is increased, that is, When the pair of dancer rolls 16 and 17 are swung by the rotation control of the electric motor 8 in the counterclockwise direction, the sag of the rolled material 5 is reduced, and the pair of dancer rolls 16 and 17 is counterclockwise about the rotation shaft 15. It rotates and returns to the initial upright position, that is, the neutral point, and the constant tension control is performed. When the sag becomes larger than the predetermined sag, the reverse action is performed, and the swing dancers 4 and 4A are returned to the upright positions.

  In FIG. 3, when the rolled material between X and Y is loosened, the dancer rollers 16 and 17 rotate toward B.

  At this time, the electric motor 11 is rotating constantly. The powder clutch 30 generates tension and slips more torque than necessary. At this time, the tension does not change.

  The potentiometer 7 sends an angle change signal to the winder 3 to increase the rotational speed of the winder 3 so that the dancer rollers 16 and 17 are neutral.

  When the rolling machine between XY stretches, the dancer rollers 16 and 17 fall toward A.

  The rotation of the electric motor 11 does not change. The slip amount of the powder clutch 30 increases and the tension does not change. By the angle change command of the potentiometer 7, the motor rotation speed of the winder 3 is reduced, and the dancer rollers 16 and 17 are returned to the neutral point.

  Thus, when the plate length of the rolled material 5 changes, the sag of the rolled material is measured by measuring the swing angle with good measurement accuracy, and this sag value is introduced as a control signal for speed control. The electric motor 8 causes the swinging motion to be accurately controlled around the rotating shaft 15 of the pair of dancer rolls 16 and 17 via the rotating shaft 15, thereby performing constant tension control of the rolled material.

  Then, when the sag of the rolled material 5 is measured and the size of the sag changes, the tension value is measured, and a tension signal is given to the motor 8 for speed control. The swinging motion of the rolls 16 and 17 around the rotating shaft 15 is controlled, and the constant tension control of the rolled material is performed.

  DESCRIPTION OF SYMBOLS 1 ... Rolling machine, 2 ... Unwinding machine, 3 ... Winding machine, 4 ... Swing dancer, 5 ... Rolled material, 6 ... Guide loan, 7 ... Potentiometer (oscillating angle measuring means, tension measuring means), 8 ... Speed control motor (drive machine), 11 ... other motors, 15 ... rotating shaft, 16, 17 ... dancer roll, 18, 19 ... dancer arm, 30 ... clutch (powder clutch), 100 ... tension control device.

Claims (4)

The inlet side of the rolling mill, or is disposed on the outlet side of the rolling mill, by controlling the speed of the rolled material by the driving motor based on the tension value of the rolled material, the rolled material tension controller for tension control of the rolled material ,
A drive for controlling the speed of the rolled material;
A rotating shaft connected to another drive machine and rotated;
A dancer arm that is fixed to the rotary shaft and that has a symmetrical shape about the rotary shaft and swings about the rotary shaft, and a symmetrical position of the dancer arm that has the same shape and that is centered on the rotary shaft A swing dancer provided with a pair of dancer rolls arranged at each free end and rolled around the rolled material in an S shape or an inverted S shape,
A swing angle measuring means attached to the rotating shaft,
If the plate length of the rolled material conveyed between the inlet side of the rolling mill and the rolled material unwinder or between the outlet side of the rolling mill and the rolled material winder changes, the swing angle changes. The size of the slack of the rolled material is measured by the correspondence, and the plate length of the rolled material is controlled by the driving force of the speed control driving machine corresponding to the size of the slack, and the rotation of the swing dancer Rolling material tension control device characterized in that swinging motion about an axis is controlled.   2. The rolling material tension control device according to claim 1, wherein the electric motor for controlling the speed of the rolled material controls an unwinding speed or a winding speed of the rolled material, or a rolling speed. Rolling material tension control device according to claim 1, between the between the inlet side and the rolled material unwinder of the rolling mill, and the outlet side of the rolling mill and the rolled material winders, or distribution in rolling mill A rolling mill system characterized by being installed. Disposed between between the rolling mill inlet side and the rolled material unwinder or the rolling mill outlet side, and the rolled material winder by controlling the speed for the motor, the tension control of the rolled material What to do,
An electric motor for controlling the speed of the rolled material, a rotating shaft connected to another electric motor and rotated,
Each of the dancer arms fixed to the rotation shaft, having a symmetrical shape about the rotation axis and swinging about the rotation axis, and having the same shape, each of the dancer arms centered on the rotation axis In a rolling material tension control method by a rolling material tension control device comprising a swing dancer provided with a pair of dancer rolls arranged at the end and rolled material is wound in an S shape or an inverted S shape,
Between the rolling mill inlet side and the rolled material unwinder or the plate length of the rolled material to be conveyed between the exit side of the rolling mill and the rolled material winder changes, the change in the swing angle, By measuring the amount of slack in the rolled material, a driving force corresponding to the amount of slack is applied to the motor for speed control, and the motor performs speed control of the rolled material, thereby rolling the material. A constant tension control of the material is performed, and the swing motion of the swing dancer around the rotation axis is controlled;
A rolling material tension control method.

Images