JPS59101226A - Controlling method of wire rod winding-up device - Google Patents

Abstract

PURPOSE:To control a falling position of the tip of a wire rod correctly in high speed rolling by finding the difference of distance from an estimated position of wire rod discharge end to a falling controlling position and the distance from the estimated position to the actual falling position of a laying type winding-up device and correcting the next falling controlling position. CONSTITUTION:When P1 represents the estimated position of wire rod discharge of the laying pipe of the laying type winding-up device, rotation of a laying cone is shifted by S1 to make the falling control position P2. Then, actual falling position P3 is determined. At this time, since the distance from P1 to P3 is the actual amount of shifting, S1-S2 becomes the difference between estimation and actual result. Accordingly, the next controlling is corrected basin on this difference.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling a laying type winder in a conveying and cooling device for rolled wire rods, and in particular to a method for controlling a falling position of the tip of a wire rod discharged from a laying type winder onto a cooling conveyor. The present invention relates to a method for controlling a laying type winding machine so that the winding speed is within the range of .

The present inventors previously proposed a method for controlling a laying type winder in Japanese Patent Application No. 51903/1983. The outline will be explained below.

Referring to FIG. 1, we will first explain the laying type winder in a general wire rod conveying and cooling device.The wire rod S rolled to a predetermined size by a finishing mill 1, which is the final stand, is passed through a guiding device 2. It is guided to a laying pipe 32 in a rotating laying type winder 31 and placed on the conveyor 4 while being formed into a continuous ring shape. Here, the speed of the guiding device 2 and the laying pipe 32 is controlled so that they rotate in synchronization with the speed of the finishing rolling mill 1, that is, the speed of the wire rod S. As a method of this speed control, the first method is
The speed regulator 6 controls the speed of the drive motor 7 of the rolling mill 1 according to the set speed from the speed reference setting device 5 as shown in the figure, and the speed regulator 9 controls the speed of the drive motor 10 of the induction device 2. controlling the speed of a driving motor 13 of a laying pipe 32 by a speed regulator 12;
Alternatively, although not shown, the speed of the drive motor of the induction device is controlled by the speed detection value of the drive motor of the finishing rolling mill, and the speed of the drive motor of the laying pipe 32 is controlled by the speed detection value of the drive motor of the induction device. There are ways to control it. In the figure, 7°10.13 indicates each drive motor, 8,
11.14 is a speed detector.

For such a wire rod conveying and cooling device, the invention of the above application transfers the wire rod S from the finishing rolling mill 1 to a laying type winder 31.
In conveying and cooling the wire which is formed into a continuous ring shape and placed on the conveyor 4, an absolute rotary engoder 15 is connected to the drive motor 13 of the laying pipe 32 in the winder 31 via a gear 16. Detectors 171 and 172 provided in front of the winding machine 31 detect the position on the rotational circumference of the discharge end of the laying pipe 32 at the time when the passage of the wire rod tip is detected, and the moving speed of the wire rod S is detected. The position of the discharge end of the laying pipe 32 on the rotational circumference at the time when the wire tip reaches the discharge end of the laying pipe 32 is calculated and predicted using the rotational speed of the laying pipe 32, and the predicted position is set in advance on the conveyor 4. When the falling position of the wire rod tip is out of the range corresponding to the target falling position range of the wire rod tip set above, the rotational speed of the laying pipe drive motor 13 is temporarily accelerated or decelerated so that the falling position of the wire rod tip is within the target position range. It is controlled as follows.

In this way, the laying pipe drive motor 13 is used to control the falling position of the tip of the wire S discharged from the laying winder 31 onto the cooling conveyor 4 within a predetermined range during transportation and cooling of the rolled wire. rotary encoder 1
5 is connected to detect and predict the position on the rotating circumference of the discharge end of the leifugu pipe 32 within a very short time, making it possible to accurately control the falling position of the wire tip even during high-speed rolling. .

However, in actual operation, even if the above control is carried out, even if it does not fall to the predicted position due to unforeseen circumstances, the result is not confirmed and the operation continues. continued,
In addition, it was found that there was a potential problem with the overall accuracy as there was no feedback on problems that occurred when only one of these deviations occurred.

The present invention has been made with the aim of solving such problems, that is, improving the control method of the invention of the above application to one with even higher precision; the gist thereof is: The wire rod (S) from 1) is formed into a continuous ring shape by a laying winder (31) and placed on the conveyor (4) during transportation and cooling.
A rotary encoder (15) is connected to the drive motor (13) of the laying pipe (32) in the winder (31), and the detector (17, 172) installed in front of the first winder detects the tip of the wire. The position on the rotational circumference of the discharge end of the laying pipe (32) at the time when the passage is detected is detected, and the tip of the wire is detected by using the moving speed of the wire (S) and the rotational speed of the laying pipe (32). The position on the rotational circumference of the emitting end of the vibrator (32) at the time of reaching the emitting end of the vibrator (32) is determined by the operator, and the predicted position is set in advance on the hair (4). When the tip of the wire falls outside the range corresponding to the target falling position range, the rotational speed of the rain vibe drive motor (13) is temporarily accelerated or decelerated so that the falling position of the tip of the wire falls within the target position range. In controlling the wire winding machine to be controlled; a distance S1 of the vibrator discharge end from the predicted position P1 to the drop control position P2 as shown in FIG. 2; and a distance S2 from the predicted position P1 to the actual drop position P3. difference Δ
S is determined, and the next drop control position is corrected based on this difference.

The details are described below.

FIG. 2 is a conceptual diagram when the rotation locus of the discharge end of the laying pipe 32 is projected onto the conveyor 4.

Note that arrow A indicates the traveling direction of the conveyor 4, and arrow B indicates the rotation direction of the discharge end of the lay leg pipe 32.

Based on the plan that the wire tip should be released when it reaches the release end position of the laying pipe 32 or between D1 and D2, first, in this control, if the predicted position is 21 points, the target The rotation of the laying cone is shifted by 81 so that it is in the desired position, namely the drop control position P2.

Next, the results are confirmed, for example, 23 actual fall positions are determined. In this case, since the distance S2 from the 21st point to the 23rd point is the actual movement amount, the difference between the two, 5l-s2=ΔS, is the difference between the predicted and actual movement. Theoretically, this difference is zero, that is, 1, and the discharge end position of the laying pipe 32 is supposed to be the wire tip falling position, but in reality, a slight deviation occurs.

Therefore, it is advisable to correct the next control based on the value of the deviation. To do this.

As shown in FIG. 3, the predicted position P+ for the current material is grasped by the rotary encoder 15 and the calculator 18,
The value of the moving distance S1 is output to the speed regulator 12 and processed. As a result, the rotary encoder 15 outputs and holds the discharge end position of the laying pipe 32 at the time when the wire tip is actually discharged. Therefore, this information, the value of part distance S2, is input to the calculator 18 as shown by the broken line in FIG. 3, and the calculator 18 combines the corresponding value of Sl and the value of 82 to calculate the phase shift error. 19, here S, -
52-±ΔS is calculated, and then the phase shift correction calculator 20 calculates the correction value ΔS'=[distance to be shifted next time (S+')/current phase shift distance of the laying vibe (S2))X(±ΔS)・
K is calculated and the result is input to the calculator 18.

Here, K is a correction coefficient that varies depending on the material size, and is usually K=O to -1.

Therefore, in the next control, first, the distance 81' to be phase shifted is determined by the calculator 18 using the conventional technique for the next wire newly detected by the passing detector 17, and the distance 81' to be phase shifted is determined by the arithmetic unit 18 using the above-mentioned correction value ΔS'. After correcting this, the signal is sent to the speed regulator 12, and this operation is repeated thereafter.

As described above, the present invention uses a rotary encoder in the laying pipe drive motor to control the fall position of the tip of the wire discharged from the laying winder onto the cooling conhair within a predetermined range during transportation and cooling of the rolled wire. The position of the laying vibrator discharge end on the rotating circumference can be detected and predicted within an extremely short time by connecting the wire rods, and the position of the wire rod tip can be accurately controlled even during high-speed rolling. It is something that can be done.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an example of a speed control system from a finishing rolling mill to a laying type winder in a conventional wire rod conveying and cooling device. FIG. 3 is a block diagram showing the speed control system of the present invention. 1: Finishing rolling mill 2: Guidance device 31:
Laying type winding rock 32 Nirayink vibe 4: Conveyor 5: Speed reference setting device 6: Speed regulator 7: Rolling mill drive motor 8, I
L 14: Speed detector 9: Speed adjustment [Yes] 10:
Induction device drive motor ″, 2: Speed regulator 13: Renong vibe drive motor 1.5H rotary gear> coater -6 = gear 17, .1
72: Wire detector 18: Computing unit 19: Phase shift error computing unit 20: Phase shift J, 1 positive computing unit S: Wire
Pl: So-called position P2: Falling king control position
P3: Actual drop position, -D3: Release end position
sl:pl p, Distance s2: p, -p, Distance Patent Applicant: Nobuoki Sugi, Patent Attorney, Nippon Steel Co., Ltd.

Claims (1)

[Scope of Claims] When the wire from the finishing mill is transported and cooled by forming it into a continuous ring shape using a laying type winding machine and placing it on a conveyor, a driving motor for a laying pipe in the winding machine is used. A rotary encoder is connected to detect the position on the rotating circumference of the discharge end of the laying pipe at the time when the passage of the wire rod tip is detected by a detector installed in front of the winder, and also to detect the moving speed and the wire rod. Using the rotational speed of the laying pipe, the position of the discharge end of the laying pipe on the rotational circumference at the time when the tip of the wire reaches the discharge end of the laying pipe is calculated and predicted, and the predicted position is set in advance for the wire rod on the conveyor. A wire winding device that temporarily accelerates or decelerates the rotational speed of the laying pipe drive motor to control the falling position of the wire tip to be within the target position range when the tip is out of the range corresponding to the target falling position range. In controlling the machine; from the predicted position P1 of the pipe discharge end to the fall control position P2
distance S1 from the predicted position P1 to the actual fall position P3
A method for controlling a wire winding machine, characterized in that the difference ΔS from the distance S2 up to the point S2 is calculated, and the next drop control position is corrected based on this difference.