JPH1119717A - Method for controlling coiling metallic strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a top mark in coiling the coil of the final products such as a cold rolled steel sheet and surface treated steel sheet. SOLUTION: In control for positioning the tip of a metallic strip with the stepped position of a stepped sleeve of a winding mandrel, the kind of steel, width and thickness of the metallic strip and amount of lubrication are taken as the information of the metallic strip, size and specification are taken as the information of the stepped sleeve, correction of deviation in positioning control corresponding these conditions is determined, this correction is stored in a controller as a table and, based on this correction of deviation, the stepped position at the time of positioning control is corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling winding of a metal strip, and more particularly to a technique for preventing top mark flaws in winding a coil of a final product such as a cold-rolled steel sheet or a surface-treated steel sheet.

[0002]

2. Description of the Related Art Generally, in a control for aligning the leading end position of a metal band with the stepped position of a stepped sleeve of a winding mandrel, the leading end position of the metal band is detected and a pulse oscillator directly connected to a bridle roll driving motor is used. To the arithmetic unit to calculate and track the movement of the tip of the metal band, while inputting the signal from the pulse oscillator directly connected to the winding mandrel drive motor to the arithmetic unit,
Calculates and tracks the stepped position of the stepped sleeve attached to the take-up mandrel so that the metal band tip position matches the stepped position of the stepped sleeve when winding the metal band.
There is known a method of controlling a stepped position by controlling a winding mandrel speed.

[0003]

In the above-described method, the positioning control including an error due to the slack of the metal band occurring between the tracking start position and the winding position of the front end of the metal band is performed. As a result, good alignment control is difficult. SUMMARY OF THE INVENTION It is an object of the present invention to improve such a drawback and to provide a method capable of accurately aligning a metal band tip position with a stepped position of a stepped sleeve in a metal band winding control method. .

[0004]

The present invention comprises the following technical means in order to solve the above-mentioned problems.
That is, in the present invention, in the control for aligning the leading end of the metal band with the stepped position of the stepped sleeve of the winding mandrel, a deviation amount between the metal band leading end position and the stepped position is detected, and the deviation amount is determined. A metal band winding control method characterized by storing as a deviation correction amount corresponding to the metal band and the sleeve condition, and correcting a stepped position at the time of winding the subsequent material based on the deviation correction amount. is there.

The inventor of the present invention has found that the deviation between the tip position of the metal strip and the stepped position of the stepped sleeve of the take-up mandrel depends on the steel type, width, thickness, etc. of the metal strip for each size and standard of the stepped sleeve. The present inventors have found that there is a strong correlation with the present invention, and as a result of investigation, completed the present invention. In the present invention, as the metal strip information, the steel type, width, thickness, and oil amount of the metal strip are taken, and the size / standard is taken as the stepped sleeve information, and the misalignment of the alignment control corresponding to these conditions is performed. The correction amount is stored as a table in the control device, and the stepped position during the alignment control is corrected based on the deviation correction amount.

[0006]

FIG. 1 shows a control circuit diagram of an example of an apparatus for implementing the method of the present invention. The traveling metal strip 1 is wound on a mandrel 8 of a winder via a bridle roll 3. Bridle Roll 3 Drive Motor 4
A traveling speed signal of the metal strip 1 is input to the arithmetic and control unit 6 from a pulse oscillator 5 directly connected to the control unit 6. The metal band front end detector 2 detects the front end 1 a of the metal band 1 and inputs it to the arithmetic and control unit 6. The arithmetic and control unit 6 starts tracking by this input, and calculates and calculates the tip position of the metal band from the tracking position.
Track. A signal from a pulse oscillator 10 directly connected to a drive motor 9 of the winding mandrel 8 is input to the arithmetic and control unit 6. The arithmetic and control unit 6 includes a winding mandrel 8
Calculates and tracks the stepped position 8a of the stepped sleeve attached to the end of the metal band 1 and the stepped sleeve 8
The speed of the winding mandrel 8 is controlled by outputting a signal to the mandrel electric motor control device 11a so that the stepped position 8a coincides with the stepped position 8a. In some cases, the bridle roll speed can be controlled by the bridle roll drive motor control device 11b. After controlling the stepped position 8a as described above and winding the metal band 1 around the stepped sleeve mounted on the winding mandrel 8, the position of the metal band tip 1a is determined using the metal band tip detector 12. The amount of deviation from the stepped position 8a is measured. The shift amount is stored in the control device as a shift correction amount of the alignment control corresponding to the metal band information (size / standard / oiling amount) and the stepped sleeve information (size / standard) at that time. For example, it is stored as a table 20. Since the stepped position 8a at the time of the alignment control after the next material is corrected by the deviation correction value, the alignment control after the next material can be accurately performed.

FIGS. 2 and 3 show a stepped position 8 of a stepped sleeve of a metal band tip 1a and a mandrel 8 due to the slack of the metal band 1. FIG.
It is a figure showing that a is shifted. The difference between the line indicating the position of the stepped position 8a of the stepped sleeve 8a of the mandrel 8 (stepped position 21) and the tip end position 22 of the metal band is the tracking shift amount 23. 4 and 5 show FIGS. 2 and 3 respectively.
FIG. 9 is a diagram showing that the stepped position 21 and the leading end position 22 of the metal band coincide with each other by correcting the tracking shift amount 23 generated in the above as a shift correction amount, and good alignment control was performed.

[0008]

According to the present invention, the slack of the metal band between the tracking start position and the winding position is used as the correction amount of the stepped sleeve stepping position control at the time of winding, so that the metal band tip and the stepped sleeve stepped position are adjusted. Alignment control of, and good alignment control became possible.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of an apparatus for implementing the method of the present invention.

FIG. 2 is an explanatory diagram of a shift amount between a tip end of a metal band and a stepped position.

FIG. 3 is an explanatory diagram of a shift amount between a tip end of a metal band and a stepped position.

FIG. 4 is an explanatory diagram of the embodiment.

FIG. 5 is an explanatory diagram of the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal strip 1 a metal strip tip 2 metal strip tip detector (for tracking start) 3 bridle roll 4 drive motor 5 bridle roll pulse transmitter 6 arithmetic control unit 7 bell trapper 8 mandrel 8 a stepped sleeve stepped position 9 drive Motor 10 Mandrel pulse transmitter 11a Mandrel motor control device 11b Bridle roll drive motor control device 12 Stepped position detector 13 Metal band tip detector 20 Table 21 Stepped position 22 Tip position of metal band 23 Tracking deviation

Claims (1)

[Claims] In a control for aligning the tip of a metal strip with a stepped position of a stepped sleeve of a winding mandrel, a shift amount between a metal strip tip position and a stepped position is detected, and the shift amount is determined by the metal. A method for controlling the winding of a metal band, comprising storing as a shift correction amount corresponding to a band and the sleeve condition, and correcting a stepped position at the time of winding of a subsequent material based on the shift correction amount.