JPH02169455A - Passing plate controller - Google Patents

Abstract

PURPOSE:To detect the winding deflection and correct the winding deflection by installing a material detector on the outlet side of a final stand and installing a shifting device onto the material detector and providing the function for judging shift to the position corresponding to the plate width. CONSTITUTION:The aimed transfer quantity of a detector for a present material is obtained by a detector stop position calculating circuit according to the plate width which is determined by a plate width calculating circuit. The actual position of the detector is calculated from the detector position calculating circuit by the signal of the input of a pulse detector connected with a material detection shifter, and position control is carried out so that the difference from the aimed shift quantity obtained by the detector stop position calculating circuit becomes zero. The winding the deflection is detected by a winding deflection detector 4 according to the input signal supplied from a PH sensor 2, which judges the winding deflection direction of DS or WS, and the pressing-down quantity is corrected for a standard value supplied from a pressing-down quantity calculating circuit 6, and the winding deflection detection and the passing plate control for correction are carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet threading control device that detects and corrects winding deviation in winding control of various plants.

[Conventional technology]

Figure 3 shows the flock control conventionally used to prevent strip meandering and ensure stable strip threading. , (3) is a rolling down device that performs rolling according to the rolling 1i reference value of rolling amount reference value (7) (described later), (4) is a meandering detector that detects meandering by input from a PH sensor, (5)
(6) is a meandering correction calculation circuit that performs a meandering correction calculation based on the amount of meandering detected by the meandering detector; (6) is a reduction amount calculation circuit such as AGC control; (8) is the final stand (n 5TAND), (91 is the stand before the final stand (n-I 5TAND)).

Next, the operation will be explained. Finishing stand (81+91
In order to prevent strip meandering during strip threading and ensure stable strip threading, a meandering correction calculation circuit (5 ), and by adding correction to the calculated reduction amount standard 4fi+71 using a reduction amount calculation circuit, etc., the reference value for the reduction device (3) of n-I 5TAND is corrected, and the reduction amount is Through control, the deviation between the mill center and the strip center is controlled to be zero.

[Problem to be solved by the invention]

Since the conventional sheet threading control device is configured as described above, the sheet threading control on the exit side of the final stand is not performed.
Therefore, correction and detection of winding misalignment is also performed at the operator's discretion, and when winding misalignment occurs, there is a problem that rewinding is required in a downstream process.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sheet threading control device that can detect winding misalignment and correct winding misalignment.

[Means to solve the problem]

The sheet threading control device according to the present invention has a material detector installed on the exit side of the final stand, a moving device attached to the material detector, and a judgment function for moving the sheet to a position according to the width of the sheet. .

[Effect]

The strip threading control device according to the present invention detects winding misalignment based on a signal from a detector that moves according to the strip width, and corrects winding misalignment by feeding back the signal and a reference value to the rolling control.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram of a winding misalignment correction function, and FIG. 2 is a block diagram of a winding misalignment detection function.

1 to 2, (11 is a winding coil, (11 is a winding coil,
2) is a PH sensor, (3) is a lowering device, (4) is a winding deviation detector that detects winding deviation by human power from the PH sensor,
(5) is a winding misalignment correction calculation circuit that performs winding misalignment correction calculation based on the amount of winding misalignment detected by the winding misalignment detector, and (6) is an AG
A reduction amount calculation circuit such as C control, (7) is a reduction RE F which adds the correction amount from the winding deviation correction calculation circuit to the reduction calculation circuit.
, +81 is n 5TAND , f (11 is n-I
5TAND, 01m is TR mandrel, al is winding coil, (2) is threading strip center position, al is P
H sensor, 0xun is the material detection mover, 0!9 is the pulse detector input at the PH sensor position, 0[9 is the pulse detector input (
5) a detector position calculation circuit that calculates the detector position by
αη is the plate width calculation circuit, 0m is the detector stop position calculation circuit that calculates the detector movement amount from the plate width, α flaw is the detector movement IR
This is a speed controller that controls the material detection mover α0 so that the deviation of FBK determined from EF and the detector position calculation circuit αQ is zero.

The operation of this invention will be explained based on FIGS. 1 and 2. In accordance with the board width determined by the board width calculation circuit α7), a target movement amount of the detector relative to the current material is determined by the detector stop position calculation circuit Ql. The actual position of the detector is calculated from the detector position calculation circuit Ql based on the signal from the pulse detector manual Q'9 connected to the material detection mover α0,
Position control is performed so that the deviation from the target movement amount determined by the detector stop position calculation circuit θ is zero.

When the position control is completed, the winding misalignment detector (4) determines whether the winding misalignment has been detected based on the input signal from the PH sensor (2).
The direction of the winding deviation is determined by the PH sensor (2). Based on this determination, the roll reduction amount is corrected with respect to the reference value from the roll reduction amount calculation circuit (6), and the sheet threading control device for detecting and correcting winding deviation is performed.

In the above embodiment, the explanation is given regarding sheet threading control in a steel line, but similar effects can be obtained in other lines that perform sheet threading and winding control.

[Effects of the Invention] As described above, according to the present invention, by installing a movable winding misalignment detection sensor on the TR on the exit side of the final stand, winding misalignment detection and correction becomes possible. This eliminates the need for repairs, improves product quality, and reduces dead time.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a winding misalignment correction function according to an embodiment of the present invention, Fig. 2 is a block diagram of a winding misalignment detection function according to an embodiment of the present invention, and Fig. 3 is a block diagram of conventional sheet threading control. It is. In the figure, +11 is the winding coil, (2) is the PH sensor, (3) is the rolling reduction amount r, (4) is the winding deviation detector, (5) is the winding deviation correction calculation circuit, and (6) is the rolling reduction amount calculation. circuit, (7)
is the reduction I-reference value, (81+91 is the stand, OI is the mandrel, Qa is the material detection mover, a!9 is the PLO input, a@ is the detector position calculation circuit, α is the board width calculation circuit, α
The barrel is the detector stop position calculation circuit, and the α-thorn is the speed controller. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1

Claims (1)

[Claims] A material detector, a mover that moves the detector position, a position detector attached to detect the detector position, and a detector stop target position calculated from the material detector movement position and plate width. The circuit is equipped with a circuit that outputs a control signal to the moving device according to the deviation of A threading control device that corrects winding misalignment by detecting the direction of the misalignment and feeding back a deviation signal to the lowering device of the front stand.