JPH1015615A - Device for controlling position of coil plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange the shape of the package of a coil by enable exact position control to a coil plate in real time. SOLUTION: The position A of the top face of the coil 7 of a rolled wire on the coil plate 9 which is lowered at reference speed set by speed setting means 2 is detected in real time by position detecting means 1, this actual position is compared with a prescribed position where is set in accordance with the set reference speed by position setting means 5 by speed correcting means 3, the reference speed is corrected based on the deviation and the position of the coil plate 9 is controlled based on the reference speed correcting the position of the coil plate 9 by speed controlling means 4 so that a head at the time of falling in a coil binding device 8 becomes constant. In the position detecting means 1, a masking for erasing a detected information to an object which is moved at a faster speed as compared with a precasted fluctuating speed of the position A of the top face of the coil 7 of the rolled wire 7 on the coil plate 9 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil concentrating device for converging a rolled wire formed in a wire rolling facility and rolled into a coil on a conveyor, and receives a rolled wire coil falling into the device. For this purpose, the present invention relates to a coil plate position control device for controlling the position of a coil plate provided movably in the vertical direction.

[0002]

2. Description of the Related Art A typical prior art of a coil plate control device is disclosed in Japanese Patent Application Laid-Open No. 55-88928 (conventional example 1), Japanese Patent Publication No. 2-40401 (conventional example 2) and Japanese Patent Publication No.
There is a known example disclosed in JP-A-62-2690 (conventional example 3).

Conventional example 1 is realized with a photoelectric detector for detecting that the upper surface of a rolled material coil deposited on a coil plate has reached a certain height, with reference to the publication, particularly to FIG. A material detector 8, a position control device 10 for receiving a signal output from the photoelectric detector 8 and generating a speed reference signal for lowering the coil plate, and a speed reference signal for receiving the speed reference signal from the position control device 10. A speed control device 9 for controlling a descending speed, the lowering speed of the coil plate is corrected depending on whether the upper surface of the rolled material coil exists on the upper surface or the lower surface of the detection position of the photoelectric detector 8, and The upper surface position of the material coil is made substantially constant.

[0004] Conventional example 2 refers to the publication, especially FIG. 1, in which first, second and third photoelectric detectors are sequentially detected from the top to detect the upper surface of a rolled material coil deposited on a coil plate. 7a, 7b and 7c are compared with the output signal of the speed detector 5e for detecting the feedback speed of the descending coil plate and the output signal of the photoelectric detectors 7a, 7b and 7c. A correction operation device 8 that corrects and calculates the descent speed, measures the moving time and distance of the upper surface of the rolled material coil, and corrects the coil plate descent speed by the actually measured ascending or descending speed of the upper surface of the rolled material coil, The upper surface position of the rolled material coil is made substantially constant.

In the prior art 3, the volume and speed of the wire sent to the coil concentrator are measured, and the product of the specific space factor (m / m ³ ) of the wire and the volume / speed is determined by the coil. The plate speed reference calculation device 4 calculates the reference descent speed of the coil plate, and controls the descent speed of the coil plate based on the reference descent speed so that the upper surface position of the rolled material coil is substantially constant.

[0006]

SUMMARY OF THE INVENTION Conventional Example 1 and Conventional Example 2
In the course of focusing of the rolled material coil, it is difficult to accurately detect the upper surface of the rolled material coil on the coil plate since the photoelectric detector inevitably detects the falling coil. Further, if a large time lag of the output of the photoelectric detector is taken in consideration of the reliability, when the upper surface of the rolled material coil is actually detected, the detection lag occurs due to the time lag. That is, it is difficult to accurately detect the position and the moving speed of the upper surface of the rolled material coil. Therefore, the upper surface of the coil to be controlled is not fixed at a fixed position but fluctuates. Further, in both the Conventional Example 1 and the Conventional Example 2, it is difficult to set the target position with respect to the upper surface of the rolled material coil to one point in the above-described control method. Absent.

On the other hand, in the conventional example 3, since the volume and speed of the wire are actually measured, it is necessary to detect the speed of the laying device and the conveyor on the upstream side of the coil focusing device, and complicated calculations must be performed. In addition, since the space factor itself differs depending on the wire size and steel type, the space factor table with a large number of values corresponding to the size and steel type must be prepared for practical use. It cannot be implemented, and therefore, the size of the apparatus becomes large, and the disadvantage of high cost is inevitable. In addition, since the compression deformation due to the coil's own weight in the coil concentrator occurs even in one wire rod, the space factor in the coil concentrator is not constant. Inaccuracies make it virtually impossible to keep the position of the coil top surface constant. If the drop between the conveyor on which the coil falls and the upper surface of the coil deposited on the coil plate is not within a certain range, the coiled rolled material will expand, the coil diameter will decrease, and the core of the focusing device will come off and the inside of the device will be removed. Or get entangled.

The present invention has been made to solve such problems, and an object of the present invention is to provide a wire rod having a diameter,
In order to always keep the coil top position at a fixed position accurately without being affected by changes in the rolling speed and conveyor speed, it is possible to precisely control the position of the coil plate in real time. An object of the present invention is to improve the packing of the coil by eliminating defects such as overflowing, facilitating the focusing operation, and preventing the occurrence of the collapse of the load and the favorable shape of the stacked ring.

[0009]

The present invention has the following configuration to achieve the above object. That is, the present invention relates to a coil concentrating device that converges a rolled wire rod that is wound into a coil shape on a conveyor after being formed in a wire rod rolling facility on a coil plate that is provided so as to be vertically movable. Speed setting means for setting the speed, and a predicted fluctuation speed corresponding to an estimated fluctuation speed of the upper surface of the rolled wire rod coil deposited on the coil plate displaced under the reference speed set by the speed setting means. Position detecting means for detecting the position of the upper surface by a detection element which performs masking for erasing detection information for an object moving at a high speed; and a predetermined position on the upper surface of the rolled wire coil corresponding to the set reference speed. A position setting means for setting the position in advance, and calculating a speed difference between an actual upper surface position detected by the position detection means and a predetermined position set by the position setting means. Speed correction means for correcting the reference speed signal output from the setting means by the deviation, and a speed signal corrected by the speed correction means is introduced and the rolled wire on the conveyor is deposited when falling into the coil concentrator. And a speed control means for controlling a position of the coil plate so that a drop from the upper surface of the coil becomes constant.

According to the present invention, in the position control device for a coil plate described in the preceding paragraph, the position detecting means sets the masking level to be different depending on the conditions of the diameter of the rolled wire coil and the reference speed of the coil plate. A plurality of detection element units are formed, and according to a change in the diameter of the coil of the rolled wire rod and the reference speed of the coil plate, the detection element unit corresponding thereto is selected and operated. And

According to the present invention, there is also provided a position control device for a coil plate as described in the preceding paragraph or the preceding paragraph, wherein the position detecting means comprises a detection area between a predetermined low limit position and a high limit position in the coil focusing device. It is characterized in that the detection function is limited so that the position of the upper surface of the rolled wire coil can be detected inside and the detection cannot be made outside the detection region.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIG. 1 showing an embodiment. The position control device for a coil plate according to the present invention includes a position detection unit realized by a distance detector 1, a speed setting unit realized by a speed setting unit 2, and a speed correction unit realized by a speed correction unit 3. , A speed control unit realized by the speed controller 4 and a position setting unit realized by the position setting unit 5.

The distance detector 1 has a detection end of a detection element disposed above the coil concentrator 8 and is directed to a coil plate 9 provided in the concentrator 8 so as to be movable in the vertical direction. The position of the upper surface A of the rolled wire rod coil 7C deposited thereon is detected by the distance from the detection end to the upper surface A, and an electric signal corresponding to the distance is output. Note that, as the distance detector 1, a range finder having a laser interferometer, an ultrasonic interferometer, or the like as an element is specifically used.

The distance detector 1 is a masking device for erasing detection information for an object that moves faster than the predicted fluctuation speed of the upper surface a of the rolled wire coil 7C, such as the rolled wire coil 7 immediately after falling from the conveyor 6. Therefore, it is possible to measure (detect) the position of the upper surface a of the rolled wire coil 7C accurately and in real time without detecting the falling coil. Here, the predicted fluctuation speed refers to a rolled wire rod coil 7 estimated to be generated when the coil plate 9 moves at a reference speed set by the speed setting unit 2 described later.
This is a value corresponding to the fluctuation speed at which the upper surface A of C is displaced.

The speed setter 2 is a speed commander for setting a reference speed of the coil plate 9 in advance. The reference speed is determined by the diameter of the rolled wire rod coil 7 and the conveyor 6 for conveying the coil 7. A value determined by the transport speed and the like, and the set reference speed is output to the speed corrector 3 as a command signal.

The position setting device 5 is a setting device for previously setting a predetermined position on the upper surface A of the rolled wire rod coil 7C deposited on the coil plate 9, and detects a detection element of the distance detector 1. It is formed so that it can be set as an electric signal corresponding to the distance from the end to the predetermined position. The predetermined position in this case is a value determined in relation to the set reference speed, and the drop of the coil falling from the conveyor 6 is also determined by this.

The speed compensator 3 is formed by a comparison operation circuit, and the rolled wire rod coil 7 obtained by the distance detector 1
The actual position of the upper surface A of C is compared with a predetermined position of the upper surface A set by the position setting device 5 to calculate the deviation and to add the deviation to the reference speed signal output from the speed setting device 2. It has become. Then, the result of the addition is output to the speed controller 4 in the next stage.

The speed controller 4 is an output circuit for providing an electric output to a drive motor 10 for moving the coil plate 9 up and down. The speed signal obtained by correcting the reference speed signal in the speed corrector 3 is introduced. Then, the speed of the drive motor 10 is controlled in accordance with the corrected speed signal, and the lowering speed of the coil plate 9 is controlled.

The operation of the coil plate position control device having such a configuration will be described below. The speed of the rolled wire coil 7 immediately after falling onto the coil plate 9 from the conveyor 6 is much faster than the moving speed of the upper surface B of the rolled wire coil 7C deposited on the coil plate 9. The distance detector 1 does not perform position detection on the rolled wire coil 7 falling at the high moving speed because the masking process is performed in the detection circuit.
The actual position of the upper surface a of the rolling wire coil 7C moving at a lower speed than that immediately after the drop is detected accurately and in real time. The position detection signal at this time is as shown by the line A1 in FIG.

The position of the upper surface A thus detected in real time and the predetermined position set by the position setting device 5 (see line A2 in FIG. 2) are input to the speed corrector 3 and compared. (See line A3 in FIG. 2) is added to the speed command output from the speed setting device 2, and the resulting corrected speed output is introduced to the speed controller 4, and the speed controller 4
Then, an output of acceleration or deceleration is output (see line A4 in FIG. 2), whereby the lowering speed of the coil plate 9 is controlled according to the output of the speed corrector 3. In this way, it is possible to aim and control at one point so that the converged coil upper surface a is always stabilized at a fixed position.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 3 is a flowchart illustrating the operation of the distance detector 1 according to the second embodiment of the present invention.
The second embodiment is substantially the same as the first embodiment shown in FIG. 1 except that the distance detector 1 has an additional element in the configuration. That is, the distance detector 1 is formed so that two or more detection element units are provided in parallel, and one necessary element is selected from among these detection element units and detected. There is a feature in the point.
In this case, as the detection element units, those having different levels for masking corresponding to the conditions of the diameter of the rolled wire coil 7 on the conveyor 6 and the reference speed of the coil plate 9 are combined, In response to changes in the initial conditions such as the coil diameter and the reference speed, one corresponding detection element unit is selected and activated.

For example, if a device for regulating the outer diameter and inner diameter of the coil is installed for the purpose of increasing the density of the bundled rolled wire coil 7C or improving the packing, the operation of the device causes the state of the upper surface of the coil to be improved. May change, and the output of the distance detector 1 may fluctuate in synchronization with the movement of the device, and the control level may fluctuate. In this case, two or more detection element units are set in accordance with a plurality of similar coil surfaces which appear differently by the operation of the apparatus, and the movement of the apparatus (Step S1, Ste
By switching and controlling the corresponding detection element unit as in Step S4, Step S5, or Step S6 of FIG. 2 in synchronization with pS2 or Step S3), the stability is improved without being affected by the fluctuation of the control level. Position control is possible.

FIG. 4 is a flowchart illustrating the operation of the distance detector 1 according to the third embodiment of the present invention. This third
The embodiment is substantially the same as the embodiment shown in FIGS. 1 and 2 except that there is an additional component in the configuration of the distance detector 1. That is, the feature is that the detection function is limited so that the distance detector 1 can detect the position of the coil upper surface a only in a preset detection area in the coil focusing device 8.

In the third embodiment, as shown in FIG. 4, for example, a predetermined lower limit position, that is, the distance detector 1
And farthest distance D _max from the detection end of the detection elements, high limit position, i.e., whether the position of the coil upper face Lee in the detection area between the closest distance D _min is present, StepS1
The detection operation is performed in Step S13 when it is within the detection area, obtained by the determination of D _min ≤ D (position) ≤ D _max in 2. This is based on the following reason.

The vertical speed of the rolled wire coil 7 immediately before falling from the conveyor 6 to the coil plate 9 is zero. Then, a detection element that has been masked to erase detection information for an object that moves at a speed higher than the predicted fluctuation speed will also detect the rolled wire coil 7 immediately before the fall. However, it is clear that the position at which it is desired to keep the converged coil upper surface a constant is considerably lower than the coil position immediately before the fall. What is necessary is just to omit distance data. In other words, the distance to be measured has a width (a measurement range is set in advance), and other distance data may be canceled. In addition, as a supplement, since the coil immediately before the drop is traveling in the conveyor transport direction, the coil immediately before the drop is not always detected. That is, within the cycle condition that satisfies the required coil plate control response,
It suffices if the position of the coil upper surface a can be sampled, and canceling the distance data itself does not pose any problem on the control surface.

[0026]

The present invention has the structure as described above,
It has an effect and is faster than the predicted fluctuation speed corresponding to the fluctuation speed of the upper surface estimated to occur in the rolled wire rod coil deposited on the coil plate displaced under the reference speed set by the speed setting means. For an object moving at a speed, the position of the upper surface is detected by position detecting means such as a distance detector in which masking for erasing detection information is performed. The upper surface position can be accurately detected in real time, which leads to real-time and accurate position control of the coil plate.

Therefore, it is possible to control the position of the upper surface of the coil focusing with a single point which could not be conventionally achieved.
The device configuration is simple and the cost is low. From the above, the present invention has excellent effects such that the upper surface of the coil can be fixed at a target position during the coil focusing operation, and the package of the coil can be arranged. You.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a position control system according to a first embodiment of the present invention.

FIG. 2 is a time chart for explaining the operation of the embodiment shown in FIG. 1;

FIG. 3 is a flowchart illustrating the operation of a distance detector 1 according to a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating the operation of a distance detector 1 according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Position detection means 2 ... Speed setting means 3 ... Speed correction means 4 ... Speed control means 5 ... Position setting means 6 ... Conveyor 7 ... Rolled wire rod coil 7C ... Rolled wire rod coil 8 ... Coil collecting device 9 ... Coil plate 10 ... Drive motor

Claims (3)

[Claims] In a coil concentrating device for converging a rolled wire rod that is wound into a coil shape on a conveyor after being formed by a wire rod rolling facility on a coil plate provided to be vertically movable, a reference speed of the coil plate is provided. Speed setting means for setting the speed of the rolling wire rod deposited on the coil plate displaced under the reference speed set by the speed setting means, which is faster than the estimated fluctuation speed corresponding to the estimated fluctuation speed of the upper surface of the coil of the rolled wire rod. Position detecting means for detecting the position of the upper surface by a detection element which performs masking for erasing detection information for an object moving at a speed; and a predetermined position on the upper surface of the rolled wire coil corresponding to the set reference speed. The speed setting is performed by obtaining a deviation between an actual upper surface position detected by the position detecting means and a predetermined position set by the position setting means. Speed correction means for correcting the reference speed signal output from the setting means by the deviation, and the speed signal corrected by the speed correction means is introduced, and the rolled wire on the conveyor is deposited when falling into the coil concentrator. And a speed control means for controlling the position of the coil plate so that the drop from the coil upper surface is constant. 2. The method according to claim 1, wherein the position detecting means includes a plurality of detection element units each having a masking level set differently in accordance with conditions of a diameter of the rolled wire coil and a reference speed of the coil plate. 2. The coil plate position control device according to claim 1, wherein the detection unit is selected and operated in accordance with a change in the reference speed of the coil plate. 3. The position detecting means is capable of detecting the position of the upper surface of the rolled wire coil in a detection area between a preset low limit position and a high limit position in the coil focusing device,
3. The position control device for a coil plate according to claim 1, wherein a detection function is limited so that detection is impossible outside the detection region.