JP2014069236A - Winding device and winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost required for eliminating a loop of a rolled material, and to stably wind the rolled material, as a result of this, by eliminating the loop of the rolled material by a simple device constitution.SOLUTION: A winding device on one mode of the present invention comprises a winding part for winding the rolled material, a cargo existence detection part for detecting the existence of the rolled material in a position separating by a predetermined distance in the carrying direction of the rolled material from the outlet side of a rolling machine, a computer and a control part. The computer calculates a loop generation quantity of the rolled material on the basis of a separate distance up to a detection position of the cargo existence detection part from the rolling machine outlet side and a moving distance of the rolled material in time up to passing through the detection position after the most tail end part of the rolling material slips out to the outlet side of the rolling machine. The control part controls the winding part so as to accelerate a winding speed of the rolled material in response to a calculation value of the loop generation quantity.

Description

  The present invention relates to a winding device and a winding method for winding a material to be rolled.

  Conventionally, in the steel field, a winding device for winding a hot-rolled steel sheet into a coil shape has been used. In general, in the hot rolling process, a slab heated to a predetermined temperature is roughly rolled to a predetermined thickness by a roughing mill, and then the steel sheet after the rough rolling is made to a desired thickness by a multi-stand continuous finishing rolling mill. Finish rolling. The steel plate after finish rolling is cooled to a predetermined temperature by a cooling device on the transport table while being transported by a transport table (hot run table) arranged on the exit side of the continuous finish rolling mill. The steel plate after cooling is wound into a coil by a winding device, whereby a hot rolled coil is manufactured.

  In the winding of a steel plate after hot rolling by a winding device, it is desired that the steel plate after finish rolling is stably conveyed by a conveying table. In particular, after the rearmost end portion of the steel sheet is pulled out to the exit side of the continuous finish rolling mill, the exit side steel sheet loses the backward tension applied from the continuous finish rolling mill. For this reason, out of the entire steel sheet to be wound by the winding device, the steel sheet is likely to be lifted (hereinafter referred to as a loop) in the steel sheet portion that is passing on the transfer table. When such a loop portion of the steel sheet is conveyed from the conveyance table toward the winding device, the loop portion is folded twice by the pinch roll between the conveyance table and the winding device, The steel sheet is wound into the mandrel of the winding device together with the folded portion (hereinafter, this phenomenon is referred to as a double folding phenomenon). Such a double folding phenomenon causes a significant reduction in the production yield of the rolled product, so it is extremely important to eliminate the steel sheet loop on the transport table.

  In addition, as a conventional technique regarding the winding of such a steel plate, for example, the amount of lift of the steel plate from the pass line is measured by a shape meter arranged in front of the pinch roll, and the measurement result of the amount of lift is used to measure the steel plate loop. When there is a steel plate loop, the presence / absence of the steel plate loop is determined to drive and control the pinch roll to apply tension to the steel plate (see Patent Document 1). Further, there is a method of measuring a steel strip loop amount with a distance detector and pulling the steel strip by accelerating the rotation speed of the mandrel when the measured loop amount exceeds a certain amount (see Patent Document 2). . Furthermore, there is a method of eliminating the loop by using a tiltable entry guide provided in front of the pinch roll (see Patent Document 3).

JP 2004-276110 A JP-A-5-192710 JP-A-6-262259

  However, in the above-described conventional technology, a device for measuring the loop amount of the steel plate, such as a shape meter or a distance detector exemplified in Patent Documents 1 and 2, must be installed in the vicinity of the transfer table. Alternatively, as illustrated in the entry guide described in Patent Document 3, a guide portion that directly presses the loop of the steel plate and a drive device for tilting the guide portion must be installed in front of the pinch roll. For this reason, the apparatus configuration necessary for eliminating the loop of the material to be rolled such as a steel plate becomes complicated, and as a result, there is a problem that a great deal of cost is required to eliminate the loop when winding the material to be rolled.

  The present invention has been made in view of the above circumstances, and it is possible to eliminate the loop of the material to be rolled by a simple apparatus configuration, and as a result, it is possible to reduce the cost required to eliminate the loop of the material to be rolled, and to be rolled An object of the present invention is to provide a winding device and a winding method capable of stably winding a material.

  In order to solve the above-described problems and achieve the object, a winding device according to the present invention includes a winding unit that winds up a material to be rolled that has been rolled by a rolling mill, and the rolled material from the outlet side of the rolling mill. A detection unit that detects the presence or absence of the material to be rolled at a position separated by a predetermined distance in the conveying direction of the material, a separation distance from the exit side of the rolling mill to the detection position of the detection unit, and a maximum distance of the material to be rolled. The material to be rolled based on the distance traveled by the material to be rolled in the conveying direction during the time from when the tail end portion has come out to the exit side of the rolling mill and after passing through the detection position of the detection unit. A calculator for calculating the amount of generated loop, and a control unit for controlling the winding unit so as to accelerate the winding speed of the material to be rolled according to the calculated value of the amount of generated loop. Features.

  Further, in the winding device according to the present invention, in the above invention, the control unit is configured to reduce the winding speed after acceleration at a predetermined timing after accelerating the winding speed. It is characterized by controlling the part.

  In the winding device according to the present invention, in the above invention, the detection unit is a center in the conveyance direction of a conveyance table that conveys the material to be rolled from the exit side of the rolling mill toward the winding unit. It arrange | positions rather than the position of the said rolling mill side rather than.

  Further, the winding method according to the present invention detects the presence or absence of the material to be rolled at a position that is spaced a predetermined distance in the conveying direction of the material to be rolled from the exit side of the rolling mill that rolls the material to be rolled. The separation distance from the exit side of the mill to the presence / absence detection position of the material to be rolled, and the time from the end of the rolled material exiting the exit side of the rolling mill to the passage of the presence / absence detection position A loop generation amount calculating step for calculating a loop generation amount of the material to be rolled based on a moving distance in which the material to be rolled has moved in the transport direction, and according to the calculated value of the loop generation amount, And an accelerating step for accelerating the winding speed of the winding unit for winding the rolled material.

  Further, the winding method according to the present invention is characterized in that, in the above invention, the winding method further includes a decelerating step of decelerating the winding speed after acceleration at a predetermined timing after the winding speed is accelerated. .

  Further, the winding method according to the present invention is the above invention, wherein the presence / absence detection position is in the transport direction of a transport table that transports the material to be rolled from the exit side of the rolling mill toward the winding unit. It is a position closer to the rolling mill than the center.

  According to the present invention, the loop of the material to be rolled can be eliminated by a simple device configuration, and as a result, the cost required for the loop of the material to be rolled can be reduced and the material to be rolled can be stably wound. There is an effect.

FIG. 1 is a block diagram illustrating a configuration example of a winding device according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the difference in the behavior of the rearmost end portion of the material to be rolled, which differs depending on whether or not a loop has occurred in the material to be rolled. FIG. 3 is a flowchart showing an example of a winding method according to the embodiment of the present invention. FIG. 4 is a diagram illustrating the timing of the winding speed control of the material to be rolled in the present invention.

  Exemplary embodiments of a winding device and a winding method according to the present invention will be explained below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiment.

(Embodiment)
First, the structure of the winding device concerning embodiment of this invention is demonstrated. FIG. 1 is a block diagram illustrating a configuration example of a winding device according to an embodiment of the present invention. The winding device 1 according to the present embodiment is a device that winds up a material to be rolled 15 that has been finish-rolled by a continuous finish rolling mill of a hot rolling line into a coil shape. In addition, the rolling mill 11 shown in FIG. 1 is a rolling mill at the last stage among the multiple-stand rolling mills constituting the continuous finish rolling mill. Moreover, the conveyance table 13 is comprised using the some conveyance roll etc. which are arrange | positioned along the conveyance direction of the to-be-rolled material 15, and conveys the to-be-rolled material 15 along a predetermined | prescribed conveyance direction.

  As shown in FIG. 1, the winding device 1 guides the rolled material 15 from the conveying table 13 side to the winding unit 2 side, and the winding unit 2 that winds the rolled material 15 after finish rolling into a coil shape. The pinch roll 3 to be performed, the load detection unit 4 for detecting the presence or absence of the material to be rolled 15 on the transport table 13, the calculator 5 for calculating the loop generation amount of the material to be rolled 15, and the winding of the material to be rolled 15 An input unit 6 for inputting various information, a storage unit 7 for storing various information necessary for controlling the winding speed of the material to be rolled 15, and a control unit 8 for controlling the winding speed of the material to be rolled 15 Is provided.

  The winding unit 2 winds the material 15 to be rolled that has been rolled by the rolling mill 11, and is configured using a mandrel 2a and a drive unit 2b as shown in FIG. The mandrel 2a is rotationally driven by the action of the drive unit 2b, whereby the material to be rolled 15 is wound into a coil shape. The driving unit 2b causes the mandrel 2a to perform rotational driving at the rotational speed instructed by the control unit 8. The winding speed of the material to be rolled 15 corresponds to the rotation speed of the mandrel 2a due to the action of the drive unit 2b.

  As shown in FIG. 1, the pinch roll 3 is comprised using a pair of roll which clamps the to-be-rolled material 15 in the thickness direction, and is arrange | positioned between the conveyance table 13 and the mandrel 2a. The pinch roll 3 sequentially guides the rolled material 15 after finish rolling conveyed by the conveying table 13 to the mandrel 2a side.

  The in-stock detection unit 4 is realized by using a detection mechanism such as an HMD (Hot Metal Detector) that detects the presence / absence or passage of an object without contact. As shown in FIG. 1, the presence detection unit 4 is disposed within the range of the conveyance path of the material to be rolled 15 by the conveyance table 13. The presence detection unit 4 detects a position that is a position between a plurality of transport rolls that configure the transport table 13 and that is separated from the exit side of the rolling mill 11 by a predetermined separation distance L in the transport direction of the material to be rolled 15. It is set as a position, and the presence or absence of the material 15 to be rolled at this detection position is detected. Note that the separation distance L between the detection position of the occupancy detection unit 4 and the exit side of the rolling mill 11 is a fixed distance determined by the relative arrangement relationship between the occupancy detection unit 4 and the rolling mill 11. . The stock detection unit 4 transmits a stock signal indicating that the material to be rolled 15 exists at the detection position to the control unit 8 when the material to be rolled 15 on the transport table 13 exists at the detection position. To turn on the stock signal. On the other hand, when the material 15 to be rolled on the transport table 13 is not present at the detection position, the stock detection unit 4 stops sending the stock signal to the control unit 8 and turns the stock signal off. .

  Here, the installation position of the above-described stock detection unit 4 is determined in consideration of the moving speed of the material 15 to be rolled on the transport table 13 and the calculation processing time for calculating the loop generation amount by the computer 5. That is, before the loop portion 16 of the material to be rolled 15 is wound on the pinch roll 3, the computer 5 completes the calculation processing of the amount of generated loop of the material to be rolled 15, and the control unit 8 performs the amount of loop generated by the computer 5. The separation distance L between the detection position of the load detection unit 4 and the exit side of the rolling mill 11 is determined so that the winding speed of the material to be rolled 15 can be accelerated according to the calculated value. Such a load detection unit 4 is configured so that the loop generation amount is calculated as early as possible after the rearmost end portion 15a of the material 15 to be rolled out to the exit side of the rolling mill 11. It is desirable to arrange at a position closer to the rolling mill 11 than the center in the conveying direction. FIG. 1 illustrates an example in which the occupancy detection unit 4 is arranged at a position closer to the rolling mill 11 than the center of the conveyance table 13 in the conveyance direction.

The computer 5 calculates a loop generation amount of the material to be rolled 15. Specifically, the computer 5 acquires the moving speed of the material to be rolled 15 on the conveyance table 13 (hereinafter referred to as a material moving speed _VMD ) constantly or every predetermined time. The computer 5 may acquire the conveyance roll rotation amount from the conveyance table 13, calculate the material movement speed _VMD based on the conveyance roll rotation amount, and manage the manufacturing conditions and the like of the material 15 to be rolled. The material moving speed V _MD may be acquired from a process computer (not shown) or the control unit 8. Alternatively, the computer 5 controls the winding speed V _r as the material moving speed V _MD based on the winding speed V _r and the material moving speed V _{MD of the} material 15 to be rolled by the winding unit 2 being the same speed. You may acquire from the drive part 2b of the part 8 or the winding part 2. FIG. The computer 5 uses the separation distance L shown in FIG. 1 and the movement distance (hereinafter referred to as material movement distance) of the material to be rolled 15 calculated based on the material movement speed _VMD described above, and the following equation (1 ) To calculate a loop generation amount L _loop of the material 15 to be rolled.

In this formula (1), the separation distance L is the distance from the exit side of the rolling mill 11 to the detection position of the load detection unit 4 as described above. The second term of the right side of the expression (1), the timing T of the outermost tail part 15a of the rolled material 15 passes the detection position of the timing T _MO from load presence detector 4 exiting the outlet side of the rolling mill 11 _This is a calculation term for the distance (material movement distance) that the material to be rolled 15 has moved in the conveyance direction during the time (elapsed time) until _DO . In this calculation section wood movement distance of the material to be rolled 15 is calculated by the time integral of wood moving velocity V _MD of the material to be rolled 15 at the elapsed time from the timing T _MO to the timing T _DO.

The timing _TMO corresponds to the timing at which the load signal from the load cell 12 shown in FIG. 1 is switched from the on state to the off state. The load meter 12 measures the rolling load of the rolling mill 11. The load meter 12 transmits a load signal indicating the rolling load of the material to be rolled 15 to the control unit 8 while the rolling mill 11 is biting (rolling) the material to be rolled 15, and turns on the load signal. Put it in a state. Thereafter, the load meter 12 stops transmitting the load signal to the control unit 8 at the timing when the rearmost end portion 15a of the material to be rolled 15 is pulled out to the exit side of the rolling mill 11, and turns off the load signal. . On the other hand, the timing T _DO corresponds to the timing at which the stock signal by the stock detection unit 4 described above switches from the on state to the off state. The stock detection unit 4 transmits the stock signal to the control unit 8 to turn on the stock signal as described above, and then the rearmost end portion 15a of the material to be rolled 15 is detected by the stock detection unit 4. At the timing of passing the position, transmission of the stock signal to the control unit 8 is stopped and the stock signal is turned off.

Here, after the rearmost end portion 15a of the material to be rolled 15 has come out to the exit side of the rolling mill 11, the behavior of the rearmost end portion 15a depends on whether or not a loop has occurred in the material 15 to be rolled. Different. FIG. 2 is a diagram for explaining the difference in the behavior of the rearmost end portion of the material to be rolled, which differs depending on whether or not a loop has occurred in the material to be rolled. As shown in FIG. 2, in a normal state in which no loop is generated in the material to be rolled 15 on the conveyance table 13, the rearmost end portion 15 a of the material to be rolled 15 has come out to the exit side of the rolling mill 11, A movement time ΔT1 is required to move in the transport direction by a separation distance L from the extraction position (position X0) to the detection position (position X3) of the in-stock detection unit 4. On the other hand, in a state in which a loop is generated in the material to be rolled 15 on the conveying table 13 (loop generation state), the rearmost end portion 15a of the material to be rolled 15 comes out to the exit side of the rolling mill 11, and then the material to be rolled. The length of the 15 loop portions 16 is forcibly drawn in the conveying direction of the material to be rolled 15 (see the thick arrow in FIG. 2). For this reason, as shown in FIG. 2, the position X2 of the rearmost end portion 15a in the loop occurrence state is forcibly preceding the position X1 of the rearmost end portion 15a in the normal state described above. Due to this, in the loop occurrence state, the movement time ΔT2 of the rearmost end portion 15a from the position X0 on the exit side of the rolling mill 11 to the position X3 of the load detection unit 4 is the movement in the normal state described above. Shorter than time ΔT1. As a result, the movement distance of the rearmost end portion 15a during the movement time ΔT2 is shorter than the movement distance (= separation distance L) of the rearmost end portion 15a in the normal state. The moving distance of the rearmost end portion 15a after being extracted from the rolling mill 11 corresponds to the material moving distance according to the second term on the right side of the above-described formula (1). That is, as shown in Expression (1), by subtracting the material movement distance of the rearmost end portion 15a at the elapsed time (= movement time ΔT2) between the timings T _MO and T _DO from the separation distance L, FIG. The length of the loop portion 16 shown in 1 and 2, in other words, the loop generation amount L _loop of the material to be rolled 15 can be calculated.

The input unit 6 is realized using an input device such as a keyboard and a mouse. The input unit 6 inputs various information to the control unit 8 in response to an input operation by the operator. Examples of the input information of the input unit 6 include various information related to winding of the material to be rolled 15 such as a speed correction value for accelerating and correcting the winding speed V _r of the material to be rolled 15.

The storage unit 7 is realized using a storage device such as a hard disk that stores information in an updatable manner. The storage unit 7 stores the information instructed to be stored by the control unit 8 and transmits the information instructed to be read by the control unit 8 to the control unit 8. Examples of information stored in the storage unit 7 include input information of the input unit 6, information on the normal winding speed _Vst of the material 15 to be rolled, information on the calculated value of the loop generation amount L _loop , and the like. Various information required for winding control of the material 15 is mentioned. The normal winding speed V _st is a winding speed of the material to be rolled 15 that is normally set according to specifications such as the composition and dimensions of the material 15 to be rolled.

The control unit 8 is realized using a memory that stores a program or the like for realizing the function of the winding device 1 and a CPU or the like that executes the program in the memory. The control unit 8 controls each operation of the drive unit 2b, the computer 5, and the storage unit 7 of the winding unit 2, and controls input / output of electric signals to / from these components. For example, the control unit 8 controls the calculation processing and execution timing of the loop generation amount L _loop by the computer 5. Further, the control unit 8 controls the winding unit 2 so as to accelerate the winding speed of the material to be rolled 15 according to the calculated value of the loop generation amount L _loop by the computer 5. Further, the control unit 8 controls the winding unit 2 to decelerate the winding speed after acceleration at a predetermined timing after accelerating the winding speed of the material 15 to be rolled.

Next, a winding method according to the embodiment of the present invention will be described. FIG. 3 is a flowchart showing an example of a winding method according to the embodiment of the present invention. FIG. 4 is a diagram illustrating the timing of the winding speed control of the material to be rolled in the present invention. In FIG. 4, “load relay” indicates the timing of the on / off state of the load signal by the load cell 12. The on-off timing of the load signal, the timing T _MO the outermost tail portion 15a of the rolled material 15 exits the outlet side of the rolling machine 11 is shown. “Site detection” indicates the timing of the on / off state of the stock signal by the stock detection unit 4. The timing T _{DO at} which the rearmost end portion 15a of the material to be rolled 15 passes the detection position of the in-stock detecting unit 4 is indicated by the on / off timing of the in-stock signal. The line A1 shows a correlation of the winding speed V _r versus time t in the case of setting the winding speed V _r of the rolled material 15 to the normal winding speed V _st. Line A2 shows the correlation of the winding speed V _r versus time t in the case of correcting the winding speed V _r of the rolled material 15 in accordance with the loop amount of generated L _loop. Hereinafter, a method for winding the material to be rolled 15 according to the present embodiment will be described with reference to FIGS. 1 and 3 and 4 described above.

In the winding method according to the present embodiment, the material to be rolled 15 is wound in a coil shape while eliminating the loop of the material to be rolled 15 using the winding device 1 shown in FIG. That is, as illustrated in FIG. 3, the winding device 1 first starts winding the finish-rolled material 15 (step S <b> 101). In step S101, the material to be rolled 15 is transported by the transport table 13 while being finish-rolled by a continuous finish rolling mill (not shown). The pinch roll 3 guides the material 15 to be rolled to the mandrel 2a of the winding unit 2 sequentially from the front end portion to the rear end portion. The mandrel 2a is rotated by the action of the drive unit 2b, and starts to wind up the material to be rolled 15 from its tip portion. As shown in FIG. 4, the control unit 8 transmits a speed command signal for instructing the normal winding speed _Vst to the drive unit 2b when the load relay is in an on state (that is, a period until time t1). The drive unit 2b rotates the mandrel 2a based on the speed command signal from the control unit 8 so as to wind up the material to be rolled 15 at the normal winding speed _Vst . Control unit 8 through the control of the driving unit 2b, for controlling the winding speed V _r of the rolled material 15 by the mandrel 2a to the normal winding speed V _st. On the other hand, the stock detection unit 4 detects the presence or absence of the material to be rolled 15 at a detection position separated by a predetermined separation distance L from the exit side of the rolling mill 11. The detection position of the presence or absence of the material to be rolled 15 is such that the loop generation amount L _loop is calculated as soon as possible after the rearmost end portion 15a of the material to be rolled 15 comes out to the exit side of the rolling mill 11. Moreover, it is desirable that the position is closer to the rolling mill 11 than the center of the transport table 13 in the transport direction.

Next, the winding device 1 calculates a loop generation amount L _loop of the material to be rolled 15 after finishing rolling is finished (step S102). In step S <b> 102, the rear end portion of the material to be rolled 15 is rolled by the rolling mill 11. The rear end side portion of the material to be rolled 15 is sequentially conveyed by the conveyance table 13, passes through the pinch roll 3, and is then wound by the mandrel 2 a. In this way, the winding of the material to be rolled 15 proceeds in sequence, and finally the rearmost end portion 15a of the material to be rolled 15 comes out to the exit side of the rolling mill 11. The rearmost end portion 15 a moves along the transport table 13 as the material to be rolled 15 is wound, and passes through the detection position of the load detection unit 4. The stock detection unit 4 continues to detect the presence or absence of the material to be rolled 15 at this detection position, and transmits the stock signal to the control unit 8 until the rearmost end portion 15a passes through this detection position to send the stock signal. Turn on the. Thereafter, the stock detection unit 4 stops transmission of the stock signal to the control unit 8 at a timing T _DO when the rearmost end portion 15a has passed this detection position and turns the stock signal off.

The control unit 8 monitors the on / off state of the load signal by the load meter 12 and the on / off state of the load signal by the load detection unit 4. Control unit 8, the timing of the load signal is switched from the ON state to the OFF state, i.e., to grasp the time t1 of the timing T _MO the outermost tail portion 15a comes out on the outlet side of the rolling mill 11 of the material to be rolled 15. Next, the control unit 8 has a timing at which the above-described in-stock signal is switched from an on state to an off state, that is, a timing T _DO at which the rearmost end portion 15a of the material to be rolled 15 passes the detection position of the in-stock detection unit 4. The time t2 is grasped. Control unit 8, the timing T _MO time t1 shown in FIG. 4, a speed command signal for instructing the speed reduction along the normal winding speed V _st and transmitted to the driving unit 2b, the material to be rolled 15 by the mandrel 2a The winding speed V _r is controlled. Next, the control unit 8, the timing T _DO of time t2 shown in FIG. 4, the processing for instructing a processing loop generating amount L _loop with time information indicating a time t2 of time t1 and the timing T _DO timing T _MO A command signal is transmitted to the computer 5.

According to the calculation processing command signal from the control unit 8, the calculator 5 is configured such that the separation distance L from the exit side of the rolling mill 11 to the detection position of the rolled material 15 and the rearmost end portion 15 a of the rolled material 15 are the rolling mill 11. Occurrence of a loop of the material 15 to be rolled based on the distance (material movement distance) that the material 15 has moved in the conveying direction during the time (t2-t1) from when the material has come out to the exit side to the detection position The quantity L _loop is calculated. In this processing, computer 5, a distance L, and the time t1 of the timing T _MO, and the time t2 of a timing T _DO, using a wood moving velocity V _MD of the material to be rolled 15, the above Expression (1) Based on the above, the loop generation amount L _loop is calculated. The computer 5 transmits a signal indicating the calculated value of the loop generation amount L _loop to the control unit 8.

After executing step S102 described above, the winding device 1 accelerates the winding speed V _r of the material to be rolled 15 according to the calculated value of the loop generation amount L _{loop in} step S102 (step S103). In step S103, the control unit 8 acquires the calculated value of the loop generation amount L _loop from the computer 5, and the winding unit so as to accelerate the winding speed V _r of the material to be rolled 15 according to the acquired calculated value. 2 is controlled. Specifically, the control unit 8 determines that a loop has occurred in the material to be rolled 15 when the calculated value of the loop generation amount L _loop exceeds the zero value. In this case, the control unit 8 adds preset speed correction value (> 0) to the normal winding speed V _st, the speed command signal for instructing the winding speed V _r after the addition processing in the driving unit 2b Send. Through the control of the driving portion 2b, the control unit 8, the winding speed V _r of the rolled material 15 by the mandrel 2a, raised to a higher speed than the normal winding speed V _st (see line A2 in FIG. 4) . The control unit 8 executes acceleration control of the winding speed V _r for a predetermined time (for example, instantaneously). Tension (for example, rear tension) is generated in the material to be rolled 15 whose winding speed V _r has been accelerated in step S103 due to friction between the conveyance roll of the conveyance table 13 and the lower surface of the material to be rolled 15. The loop portion 16 of the material to be rolled 15 is pulled in the longitudinal direction of the material to be rolled 15 by this tension. As a result, the loop portion 16 becomes substantially flat, and the loop of the material to be rolled 15 is eliminated.

On the other hand, in step S103 described above, the control unit 8 determines that no loop has occurred in the material 15 to be rolled when the calculated value of the loop generation amount L _loop obtained from the computer 5 is equal to or less than zero. In this case, the control unit 8 does not perform the acceleration control described above, and maintains the current normal winding speed _Vst .

After execution of step S103, the winding device 1 decelerates the winding speed V _r after acceleration by the step S103 (step S104). In step S104, the control unit 8, a predetermined timing after accelerating winding speed V _r, as described above, it controls the winding unit 2 so as to decelerate the winding speed V _r after acceleration. Specifically, as shown in FIG. 4, for example, the control unit 8 instructs the deceleration of the winding speed V _r at a timing when a predetermined time has elapsed from the time t2 at which the acceleration control of the winding speed V _r is started. The speed command signal to be transmitted is transmitted to the drive unit 2b. Through the control of the drive unit 2b, the control unit 8 performs the normal winding of the winding speed V _r after acceleration described above until the time t3 before the rearmost end portion 15a of the material to be rolled 15 passes through the pinch roll 3. Decelerate to take speed V _st . Thereafter, the control unit 8 controls the drive unit 2b so as to decelerate the rotation speed of the mandrel 2a along the normal winding speed _Vst . Next, the control unit 8 controls the drive unit 2b so as to stop the rotation operation of the mandrel 2a substantially simultaneously with the completion of winding of the material 15 to be rolled by the mandrel 2a, and ends this process. In addition, the winding apparatus 1 repeatedly performs each process step of step S101-S104 mentioned above for every to-be-rolled material rolled.

  As described above, in the embodiment of the present invention, the presence or absence of the material to be rolled is detected at a position (presence / absence detection position) that is separated from the exit side of the rolling mill by a predetermined distance in the conveyance direction of the material to be rolled. The separation distance from the exit side of the rolling mill to the presence / absence detection position of the material to be rolled, and the material to be rolled in the time from when the rearmost end portion of the rolled material slips out to the exit side of the rolling mill and passes the presence / absence detection position Based on the travel distance moved in the transport direction, the loop generation amount of the material to be rolled is calculated, and the winding speed of the material to be rolled is accelerated according to the calculated value of the loop generation amount. did.

  For this reason, it is not necessary to install a device for directly measuring the loop amount of the material to be rolled, such as a shaper or a distance detector, in the conveyance path of the material to be rolled from the exit side of the rolling mill to the pinch roll in front of the winding unit. The amount of loop generated in the material to be rolled can be grasped, and further, the amount of various lifts of the material to be rolled suspected of being a loop can be grasped as the amount of loop generated. In addition, without additional equipment such as a guide to hold down the loop of the material to be rolled, the loop generation amount of the material to be rolled can be reduced as much as possible by accelerating the winding speed of the material to be rolled by the existing winding unit. Can be reduced. Therefore, not only the loop of the material to be rolled, but also various floating states of the material to be rolled that are suspected of being a loop can be eliminated with a simple apparatus configuration. As a result, both the cost required for eliminating the loop of the material to be rolled and the labor required for equipment such as maintenance can be reduced, and the material to be rolled can be stabilized without causing the double folding phenomenon of the material to be rolled. Can be wound up. As a result, it is possible to easily suppress a decrease in manufacturing yield of rolled products (hot rolled coils, etc.) due to the double folding phenomenon.

  In the embodiment described above, acceleration control of the winding speed of the material to be rolled is performed according to the amount of loop generation by adding a predetermined speed correction value set in advance to the winding speed of the material to be rolled. However, the present invention is not limited to this, and the speed correction value is adjusted in accordance with the degree of loop generation of the material to be rolled, and the speed correction value after this adjustment is added to the winding speed to control the acceleration of the winding speed. You may go. In this case, the speed correction value may be calculated based on the loop generation amount, or a speed corresponding to the calculated loop generation amount using a data table in which the speed correction value is associated with each level of the loop generation amount. The correction value may be selected from the data table.

  In the above-described embodiment, when the calculated value of the loop generation amount exceeds the zero value, it is determined that a loop has occurred in the material to be rolled, and the acceleration control of the winding speed is performed. However, the present invention is not limited to this. That is, a threshold value related to the loop generation amount may be set in advance, and when the calculated value of the loop generation amount exceeds the set threshold value, it may be determined that a loop has occurred in the material to be rolled, and acceleration control of the winding speed may be performed. . Further, when the calculated value of the loop generation amount is equal to or less than the set threshold value, it may be determined that no loop has occurred in the material to be rolled and the winding speed is not accelerated.

  Further, in the above-described embodiment, the winding speed is accelerated for a predetermined time set in advance. However, the present invention is not limited to this, and the winding speed acceleration time is increased as the calculated value of the loop generation amount increases. The acceleration time of the winding speed may be decreased as the calculated value of the loop generation amount decreases.

  In the above-described embodiment, the winding speed is decelerated at a timing when a predetermined time has elapsed after the winding speed is accelerated. The winding speed may be reduced at the timing at which the material to be rolled is wound.

  Furthermore, in embodiment mentioned above, although the presence or absence of the to-be-rolled material 15 was detected by non-contact-type in-stock detection parts 4, such as HMD, not only this but the in-stock detection part 4 is a to-be-rolled material. The presence or absence of the material to be rolled 15 may be detected by detecting the load applied to the transport roll when 15 moves along the transport table 13. That is, in the present invention, the stock detection unit 4 may be a non-contact type or a contact type detection means.

  Further, the present invention is not limited by the above-described embodiment, and the present invention includes a configuration in which the above-described constituent elements are appropriately combined. For example, the rolled material to be wound may be a plate-shaped or strip-shaped steel material, or may be a metal material other than a steel material such as copper or aluminum. In addition, all other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the above-described embodiments are included in the present invention.

DESCRIPTION OF SYMBOLS 1 Winding device 2 Winding part 2a Mandrel 2b Drive part 3 Pinch roll 4 Existence detection part 5 Computer 6 Input part 7 Storage part 8 Control part 11 Rolling mill 12 Load meter 13 Conveying table 15 Rolled material 15a Endmost part 16 Loop part

Claims (6)

A winding unit for winding a material to be rolled that has been rolled by a rolling mill;
A detection unit that detects the presence or absence of the material to be rolled at a predetermined distance from the exit side of the rolling mill in the conveying direction of the material to be rolled;
The separation distance from the exit side of the rolling mill to the detection position of the detection unit, and from the end of the material to be rolled out to the exit side of the rolling mill until passing through the detection position of the detection unit A calculator that calculates the amount of loop occurrence of the material to be rolled based on the distance traveled by the material to be rolled in time in the transport direction;
According to the calculated value of the loop generation amount, a control unit that controls the winding unit to accelerate the winding speed of the material to be rolled,
A winding device comprising:   2. The winding according to claim 1, wherein the control unit controls the winding unit to decelerate the winding speed after acceleration at a predetermined timing after accelerating the winding speed. Taking device.   The detection unit is arranged at a position closer to the rolling mill than a center in the conveyance direction of a conveyance table that conveys the material to be rolled from the exit side of the rolling mill toward the winding unit. The winding device according to claim 1 or 2. The presence / absence of the material to be rolled is detected from the exit side of the rolling mill by detecting the presence / absence of the material to be rolled at a predetermined distance from the exit side of the rolling mill for rolling the material to be rolled. The to-be-rolled material moved in the conveying direction in the time from the separation distance to the detection position and the time when the rearmost end portion of the to-be-rolled material slips out to the exit side of the rolling mill and passes through the presence / absence detection position. Based on the movement distance, a loop generation amount calculating step for calculating a loop generation amount of the material to be rolled,
According to the calculated value of the loop generation amount, an acceleration step of accelerating the winding speed of the winding unit that winds up the material to be rolled,
The winding method characterized by including.   5. The winding method according to claim 4, further comprising a decelerating step of decelerating the winding speed after the acceleration at a predetermined timing after the winding speed is accelerated.   The presence / absence detection position is a position closer to the rolling mill than a center in the transport direction of a transport table that transports the material to be rolled from the exit side of the rolling mill toward the winding unit. The winding method according to claim 4 or 5.

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