JPS6021123A - Method for controlling relative position of rolling material and laying head - Google Patents

Abstract

PURPOSE:To control ideally the relative position of a rolling material and a laying head by determining the lead rate of the laying head just before the rear end of the rolling material passes through a finishing mill and after passing therethrough and predicting and calculating the discharging position of the rear end of the rolling material. CONSTITUTION:A lead rate KLM of a laying head during finishing mill on with respect to a rolled material is determined from the ratio between pulse counters CTR2 and CTR4 before the rear end of the rolled material passes through a finishing mill in an arithmetic device 2. The lead rate K'LH of the laying head after passing through the finishing mill with respect to the rolling material is then determined from the ratio between pulse counters CTR6 and CTR4 after the rear end of the rolling material passes through the finishing mill. The two values are outputted to an arithmetic device 6 which predicts and calculates the discharging position of the rear end of the 2nd and succeeding rolling materials of the same lot and outputs a speed correction signal 7 for the speed reference of the laying head. The rear end of the rolling material is thus always discharged from the optimum position of the discharge port provided to the laying head.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a device for winding a wire rod from a finishing mill of a wire rod rolling mill into a coil shape using a laying head and then placing the coiled wire rod on a conveyor. In particular, a relative position control method of a laying head on a rolled material, which controls the position of the hard material and the position of the laying head discharge port so that the rear end of the wire is in a fixed position when the wire is discharged from the rain head. 1y to.

[Technical background of the invention and its problems]

In this divine rolling machine, the rolling line including the finishing mill, laying pinch rolls, laying head, and belt conveyor of the wire rod rolling machine is constructed as shown in Figure 1.

In FIG. 1, the wire X passes through the finishing mill FM and the laying pinch roll LP, and then is driven in the direction of the arrow Y and supplied to the laying head LH. The wire X is wound into a coil while passing through this laying head LH, and becomes a coil CL. The coil CL is continuously placed on a belt conveyor BL driven in the direction of arrow Y'. Belt competition T
The coil CL placed on the BL is the belt conveyor BL
They are bundled and bundled at the end (not shown) before being shipped.

The laying head LH has a conical shape as shown in FIG.
H is fixed, and this ohm wheel WH meshes with an ohm W coupled to the rain head drive motor M2ζ.

That is, the rain head LH is rotated by the electric motor M2. A coil-shaped vibe PI is fixed inside the rain head LH as shown by the dotted line, and the wire X that enters from the entrance end is wound into a continuous ring-shaped coil CL by the rotation of the rain head LH. Meanwhile, it is discharged from the discharge port E of the laying head LH and placed on the belt conveyor BL.

Figure 2(b) shows the laying head L shown in Figure 2(a).
It is a side view of H seen from the direction of arrow 2B, and illustration of the ohm wheel WH and ohm W is omitted. Figure 2(b)
The symbols LS, F, , H shown in will be described later.

3(a) and 3(b) each show a state in which the wire X passes through the laying head LH and the formed coil CL is placed on the belt conveyor BL. 143
1fi As shown in (a), at the position where the rear end A of the coil CL protrudes outside the coil CL, the belt conveyor BLζ
When this is placed, the coil CL comes into contact with a peripheral device (not shown) of the belt conveyor BL, resulting in a state where the "CIf 1+L line has no choice but to be shut down."

It is preferable that the rear end A of the coil CL is placed on the belt conveyor BL so that the rear end A of the coil CL is located at the rear end A of the coil CL, as shown in FIG. 3(b). For this reason, conventionally, the terminal end of the coil CL placed on the conveyor BL and running is cut manually, and the rear end of the coil is cut off as shown in FIG. 3(b).
It had to be located at point A shown in .

Recently, as a solution to the above problem, by controlling the rotational speed of the laying head LM, the relative running speed with respect to the wire material X is controlled. A method of controlling the relative position of the rolling material and the laying head has been devised, which automatically controls the rotational angle position of the ink head Ll (Ll) so that the rotational angle position of the ink head Ll is always constant and the terminal end A of the coil CL is ejected inside the coil CL. .

A conventional embodiment will be described below with reference to FIG. E4
In the figure, parts that are the same as those in FIG. 1 are given the same reference numerals and their explanations will be omitted.

In FIG. 4, the finishing mill FM is driven by a finishing mill driving electric motor M1, and this electric motor M1 is equipped with a pulse transmitter PCI. Rain Pinch Roll L
P is driven by an electric motor M3 for driving a rain pin roll, and a pulse transmitter PG3 is attached to this electric motor M3. The laying head LH is driven by an electric motor M2 for driving the laying head, and a pulse generator PG2 is attached to this button and the driving motor M2.

Further, a limit switch LS is attached to the pulse generator PG2.

On the upper plate of the finishing mill FM, distance 1' from the rain head LH.
; I L +1 (converted to finishing mill exit wire rod, etc.'i
The detector HDI of the rolled material, that is, the wire rod, is located at lr+ downstream of the finishing mill F.
1 separation L1 separation 1 mil li' M・2 exit) position i
A detector If D 2 attached to l'2 is located at a distance T, 2 immediately in front of the rain pinch roll LP, and a wire detector 1 (
D3 are provided respectively. The rear end A of the I prompt 44'X is the detector EI D1, HD2, HD3
Therefore, each time V is detected.

As shown in FIG. 2(b), the discharge port E1 of the laying head
In other words, the end of the pipe PI has rotated 02 times from the reference position F.
When the material discharge target point B is reached, it is possible to make the material come to a desired position (0≦θ≦1).

Here, in the rolling line configured as described above, the relative position control between the rolled material and the layer/rad is performed by momentarily predicting the rear end discharge position θ and correcting the rain head speed, thereby controlling the predicted discharge position θ. This is done by reducing the difference between the target position θa and the target position θa to zero.

FIG. 5 shows a schematic block configuration for explaining such a conventional control method. In FIG. 5ζ, the pulse value of the pulse generator PCI is determined by the pulse counter CTRI,
It is counted by CTR2. The counter CTRI is connected to the gate G1ζ (not shown) or the detector HD1 to the coil C.
When the backside detection signal of L is input, the counter bond is cleared at that timing. That is, the counter CTRL counts a value proportional to the trailing end travel distance 14fi4 after the detector HDI detects the trailing end of the coil c. Also, counter CTR2 is gate G20
This clock signal is input, and the counter CT
R2 is now cleared. That is, the count value of the counter CTR2 indicates the quick production of the finishing mill. The pulse value of the pulse generator PG3 is determined by the pulse counter C.
It is counted in TR5. This pulse counter CTR5
is cleared when the rear end detection signal n is input from the gate G5G detector HD2, and the detector HD2 outputs "il C"
LO) Rear end driving after taking out the rear end! i! Count the flu proportional to f. Pulse transmitter 1”
The pulse value of G2 is determined by the pulse counter C'l'R3°CT
It is counted in R4. The pulse counter CTR3 is set at the discharge port base i% position FM.
Cleared when the output signal of switch LS is input,
Ejection mIl: 1EO) Current value θl, a value proportional to H is counted. A clock signal is input to the gate G4 of the pulse counter CTR4, and its count value indicates the head speed of one link.

On the other hand, numerals 1 to 4 in the figure are arithmetic units; The calculation devices 1 to -7 perform the following calculations.

ν]j'f-), the arithmetic unit 1 is a pulse counter CTFL
I.

The distance l traveled by the rear end of the coil CL from the rear end tracking starting point is calculated by inputting the output signal of CTR5, the output signal of detector MDI, and the output signal of HD2.・・・・・・(1) I'm confused. Here, Pl is the pulse count value of the pulse counter CTRI after the start of tracking; After the edge is detected, the output signal of pulse counter CTR5? (input in the calculation area). In addition, C is a furnace pulse counter (I-value, not shown) per pulse.
1lII] length, the pulse generator PG2. It's like PG3, and it's ¥1kn. Threshold calculation device g4 z is the output signal of pulse counter CT R2, CT R4 and detector HDI,
By inputting the same output signal of HD2, the pulse count 1 of the pulse counter CTR4 which is delayed by HD21 from the detector HDI of the material is made true, and the pulse count 1 of the pulse counter CTR2 of the same control is made true. The lead rate KLH of the laying head rotational speed at which the wire is laid can be calculated from the ratio of these two integrated values.

The arithmetic unit 3 calculates the rotational position θLH of the laying head ejection port E from the reference position by inputting the output signal of the pulse counter CTR3, and calculates the pulse count value of the pulse transmission 'E-p G2 by the pulse jy+'y-n* CTR3
Calculate the balance with limit switch LS (every rotation) (7
O$01 by setting 1J. + (1 between ≦1
Detected as direct. The arithmetic unit 4 is a detector (D I
, f-! 7.Depending on the input of the output symbol of D2. Izumi;
・iM From the tracking start point to the discharge port IC
A device that measures the distance 11Jl-, for example, a wire detector H.
If starting from D1, use the above distance.

I got 21 things directly from item 1, then 1! α out((1÷1(
]) When the rear end is detected in step 2, the front Mjj distance is taken as L1.

Reference numeral 5 denotes a storage device, and the storage device 5 stores the index position .theta. or is given from the outside.

Furthermore, 0 and 6 are arithmetic units, and this arithmetic unit 6 receives the arithmetic outputs l of each of the aforesaid arithmetic units 1 to 4.

1'(], 111θLH, L, θR and storage device 5
The memory output OR is manually generated, and based on these, the coil CL
The predicted ejection position θ (0≦θ≦1) at the rear end is determined by the following equation.

However, sDLH is the rotational diameter of the rain head discharge port E, and k is a correction term for setting the predicted discharge position θ to 0≦θ≦1, and is an integer value of 1, 2, 3, . . . .

Therefore, in the control device having such a configuration, in order to control the relative position between the rolled material and the laying head, the predicted discharge position θ of the rear end of the coil CL is determined from the equation (2) determined by the calculation device 6, and The constantly changing difference from the target position θB is converted by proportional control or proportional-integral control using the laying head rotational speed correction term 7. Although not shown in the figure, by adding it to the laying head speed reference, relative position control can be performed. It is done.

By the way, in the above-mentioned rolling line, if slack occurs in the rolled material X between the finishing mill FM and the laying vinyl roll LP, the rolled material is likely to be damaged between them and may cause misrolling. Furthermore, since the rolled material does not pass through a certain pass line, this may cause malfunction of the star detector.

Therefore, in order to eliminate such problems, in addition to the above-mentioned relative position control, the following control i1 is performed to generate tension in the rolled material between the finishing mill FM and the laying pinch roll LP. I try to be very talented. That is, the speed of the rain pinch roll LP is controlled based on the line speed, that is, the value obtained by adding the REET weight to the speed standard VFM of the finishing mill FM, and the speed is controlled based on the linearity dA. Drooping pre-stop is performed by feeding back the armature current of M3. However, when such control is performed, when the rolled material is caught in the upper mill FM, the speed of the rolled material is the speed of the finishing mill FM, and at the same time, the rolled material is caught in the laying vinyl roll LP. If you have one, use Raining Pinch Roll LP.
Although the actual speed of the finishing mill FM is synchronized with the pressure 4tg material,
The speed of VFM+ is suppressed. Therefore, if things continue as they are, an excessive armature current will be generated in the speed control system of the motor M3 for 1-ton operation of the raining pinch roll LP in an attempt to converge the deviation between the speed reference with the lead weight added and the actual speed feedback amount to 0. flows, and an electric motor (not shown) (M3 control device) is activated.

Therefore, as a countermeasure to this, when the current increases, the a LL M standard of the rain pinch roll LP is lowered to reduce the deviation from the actual speed and prevent the excessive 71 "d□lff1J child flow from flowing." .

Here, the speed reference VLP of the laying pinch roll LP is given by the following equation (3).

VLP == VFMX (1+K1.p)-Δ
VDR--(3) where KLP is the lead wheel amount of the laying pinch roll, and ΔVD is the true pink correction number given in proportion to the feedback amount ζ of the armature current.

Therefore, by setting (VFM x KLP > ΔVt + a), a current corresponding to the extreme deviation of (VFMXKLP - ΔvD 几) will always flow to the electric pinch roll drive motor 4aM3, and the speed of the laying pinch roll LP will change to the finishing mill. It is possible to generate appropriate tension in the rolled material between the FMs and eliminate slack in the rolled material between the finishing mill FM and rain pinch rolls LP.

However, such a control method applies when the rolled material Therefore, the finishing mill speed standard VFM and true pink correction amount ΔV are
Hold D. Therefore, when the tension applied between the finishing mill FM and the rain pinch roll LP with respect to the pressure 1tL kA'
3) The value of Eq. will already be accelerated.

Therefore, the laying head lead ratio KLH in equation (2) that calculates the predicted rear end position is
The value changes between during rolling and after rolling, resulting in a problem that an error occurs in the preliminary calculation 11 for controlling the rear end discharge position of the rolled material.

[Purpose of the invention]

The purpose of the present invention is to accurately predict and calculate the rear end discharge position of the rolled material by calculating the laying head lead ratio after finishing mill removal and removal. The present invention provides a method for controlling the relative position of a rolling head and a rolling head that can be controlled so that the rear end is discharged from the optimal position of the laying head discharge port.

[Summary of the invention]

In order to achieve such an object, the present invention has the following objectives: 14T = ff 14T= for the first rolled material without controlling the relative position of the rain head; The ratios of the laying head speed, the rolling machine M degree, and the laying pinch roll speed detected at any timing after the trailing edge of the rolled material was detected by the measured timber depth detector are memorized, and the following ratios are stored. The running distance of the rolled material detected by the pulse transmitter of the rolling grinder or the laying pinch roll after the material detector detects the rear end of the rolled material during subsequent rolling of the rolled material and the rolling of the first rolled material The trailing edge tracking is performed based on the respective speed ratios memorized at the time, and the speed standard of the laying head is corrected so that the trailing end of the rolled material is discharged from the fourth position of the laying head. It is characterized by the relative position of the head.

[English ha1 example of starting point 1] An embodiment of the present invention will be described below with reference to the drawings. FIG. 6 is a diagram 1IIIJ (+l
This figure shows a schematic configuration example of the I device, and is the same as in Fig. 5. In the groove number part, (a, 1-gradient number is I"J' L, -C, the explanation "su" is omitted, Here, we can carry the different parts ζ.

In this embodiment e, a pulse counter CTR6 is provided to count the pulses output from the pulse generator PG3, and the count (+!-2+clock number 1a- is input to the control device 2) G61 is outputted. I can buy things. The count value of this pulse counter CTR6 indicates the speed of the rain pinch roll. Further, the output of a wire detector HD3 provided at a position immediately in front of one pinch roll LP is applied to the arithmetic unit 2.

On the other hand, the arithmetic unit 2 has inputs shown in the figure 5, that is, pulse counters CTR2, CTR4, and 4-material detector MDI.
. The ratio of the input from the PCI to the input from the pulse generator iPG 2 of the rain head LH determines the lead rate KLM of the rain head speed that is mowed during the rolling phase. After detecting the trailing edge, the lead Fe of the laying head speed relative to the rolling material speed is determined by the ratio of the input from the rain pinch roll LP pulse generator 1) G3 to the input from the rain head LH pulse generator PG 2. K L I (') Next, a method for controlling the relative position of the rolled material and the laying head in the control device configured as described above will be described.

First, the first rolled paulownia in the same lot is rolled without relative position control, and at this time, the rear end of the rolled material is synchronized with the rolling phase or finishing mill FM before it is removed by the finishing mill. , the lead for the rolled material of the laying head during finishing mill-on from the ratio of pulse counter C'rR2 and CT R,4.
r<I(L M is determined by equation (4).

・・・・・・・・・(4) However, the relationship between the pulse count and speed of kl (・C1N'r2, CR1'4 is constant θ. Next, the rear end of the pressure-treated material or the finishing mill FM After passing through, it synchronizes with the rolled material or the laying vinyl roll LP, so the pulse color: //CTR6
and the ratio with CTR4 to determine the lead ratio of the rolling head to the rolled material after finishing the finishing mill FM.
is determined by equation (5).

... (5) However, k2 is a conversion constant between the pulse count and speed of CTR4'' and CTR6.

In this way, the laying head lead rate KLn/'hn after finishing mill load off achieved in tWL 2.
is output to the arithmetic unit 6, and this arithmetic unit 6 uses the predetermined position σJ11(A
Used as a calculation. In this case, the prediction calculation of the end position is performed using equation (6) or equation (7) instead of the conventional equation (2).

Here, the equation (6) is a prediction equation while the finishing mill load is on, and the equation (7) is used after the finishing mill load is off. ni' in formula (7) is 0 like k in formula (6),
A correction term for 0≦O≦1, 1°2.3. ...
is the rectified value of

The above calculations are performed by the calculation device 6 shown in FIG. 6, and although not shown, a speed correction signal 7 is outputted with respect to the laying head speed reference. Therefore, by correcting the rain head speed reference using the correction signal 7 and controlling the relative position between the rolled material and the laying head, the rear end of the rolled material is always kept from the optimum position t of the laying head discharge port. It becomes possible to discharge.

〔Effect of the invention〕

As described above, according to the present invention, the rear end discharge position of the rolled material is accurately predicted by calculating the laying head lead ratio after the finishing mill exit III and the after removal of the rolled material. Therefore, it is possible to provide a method for controlling the relative position of a rolling head and a rolling head that can always discharge the rolled material from the rear end of the rolling head or from the optimal position of one wing head discharge port.

[Brief explanation of drawings]

Figure 1 is a conventional rolling line configuration diagram when a laying head is applied to a finishing slit of a wire rod rolling mill, and Figure 2 (a)
is a top view of the laying head shown in Fig. 1, gW Fig. 2 is a plan view showing the pulse count start point of the laying head and the wire discharge target point, Figs. 3 (a) and (b) are the laying head 4 is a block diagram of a rolling line to which the present invention is applied. FIG. 5 is a block diagram schematically showing a conventional control device. FIG. 1 is a schematic configuration diagram of a control device showing one embodiment for explaining the method of the present invention. FM...finishing mill (rolling mill), LP...laying pinge roll, LH...rain head , X...wire rod, A...rear end of equipment, BL...belt compare, P
GI~PG3...Pulse oscillator, GI, G2゜04~
G6...Gate, CTRI~CTR6...Pulse counter, HDI~HD3...Wire detector, L S...
・Limit switch, M1 to M3...drive motor,
1-4, 6... Arithmetic device, 5... Storage device. Applicant's agent Patent attorney Takehiko Suzue Figure 1 0-LS Figure 5

Claims (1)

[Claims] The rolled material rolled by the rolling mill is supplied to a laying head via rain pinch rolls, and when the rolling head is rotated, the rolled material is wound into a coil shape and taken out.
The position and rotation speed of the rain head are detected from the output of a pulse transmitter that detects the amount of rotation of the rolling head, and the running amount and speed of the rolling mill are determined from the output of the pulse transmitter that detects the amount of rotation of the rolling mill. Further, the traveling distance of the rolled material and the speed of the laying pinch roll are detected from the output of a pulse transmitter that detects the rotation amount of the rain pinch roll, and the laying head speed reference value is corrected based on these detected values. In the method of controlling the relative position of the rolled material and the laying head so that the rear end of the rolled material discharged from the laying head is in a fixed position, At the same time as rolling without relative position control, the rolling mill is turned on by 1 fl.
! l 7a: Detect the laying head speed, rolling mill speed, and laying pinch roll speed at any timing after the rear end of the rolled material is detected by the rolled material detector provided on the outlet side of the rolling stock, and detect each of them. The ratio is memorized, and after the rear end of the rolled material is detected by the rolled material detector during the rolling of the next rolled material, it is detected from the output of the pulse 'A signal 5 of the rolling mill or laying pinch roll. Rolled material traveling 1 and U A11He Tracking of the trailing edge of the rolled material is performed based on the speed ratio memorized during rolling of the first rolled material, so that the trailing end of the rolled material is discharged from the optimal position of the rolling head discharge port. A method for detecting the relative position of a rolling material and a laying head, comprising controlling the relative position of the rolling material and the laying head by correcting the speed base of the laying head.