JPS5973118A - Tracking device for tip end of strip for coiler - Google Patents

Abstract

PURPOSE:To avoid damaging a strip to be taken up on a mandrel by providing a revolution detector for pinch rolls, an acceleration detector for unit rolls, a temp. detector, etc. and knowing the tip end position of a strip. CONSTITUTION:A titled device consists of pinch rolls 2, a mandrel 1, plural unit rolls 5, 5a, 5b, and a control mechanism provided thereto. A revolution detector 18 is provided to the roll 2 and an acceleration detector 21 to the roll 5. A temp. detector 20 is provided in addition to said detectors, and the passage of the tip end of the strip 4 through the roll 5 is detected. An arithmetic device 16 is further provided to calculate the tip end position of the strip 4 with the signals from the detectors 18, 21, 20 and the preset slip and slack of the strip 4 and to transmit the result thereof to the above-described control mechanism. The roll 5 is advanced to press or detach the strip 4 by the above-mentioned mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a strip tip tracking device for a winding device, and is intended to prevent the strip being wound around a mandrel from being damaged.

A conventional strip winding device H equipped with unit rollers is shown in FIG. As shown in the figure, the mandrel 1 is a device that winds up the hot strip 4 that enters while being guided by the pinch roller 2 and the guide 3. In the meantime, the strip rotates at a leading speed relative to the threading speed of the strip 4, and after the winding is completed, it rotates in synchronization with the threading speed.

Unit rollers 5.5 a, 5 bi, j: are arranged around the mandrel l and apply a constant pressure to wrap the strip 4 around the mandrel l without loosening, and the strip 4ff: pusher in the direction of the mandrel; Like mandrel 1, it rotates at a slightly 1 nodding speed compared to the threading speed. The unit roller frame 6 to which the unit row 25 and its bearing are attached is connected to the unit frame 9 via the rotatable pin 8 and the buffer spring 7'5. unit frame 9b1
It can be rotated in place of a cylinder 0 attached to a housing (not shown), and is pressed in the direction of the cylinder by an actuator 13 connected to a piston 12 in a hydraulic cylinder 11. This hydraulic actuator is adjusted so that different set pressures can be maintained for each plate thickness. Note that the reference numeral 14 in the figure is a hydraulic system. Although not shown in the figure, the unit rollers 5a and 5b also
Similarly to (a), the same members as those shown in numerals 6 to 4 are provided.

FIG. 2 shows how the conventional winding device is wound. As shown in the figure, when the tip of the strip reaches the unit roller position, the unit roller 5 is suddenly pushed up due to the step at the tip of the strip. Otherwise, the tip of the strip may dig into the inner surface of the outwardly wound strip 4, causing scratches on the plate.

In addition, due to the challenge of the unit roller 5 during pushing up, the pressing time for the unit roller 5 to press the strip 4 against the mandrel 1 is reduced, and the strip 4 is pressed against the mandrel 1.
It is not possible to wind the strip tightly, and gaps occur between the strips just before the winding is completed, which can cause scratches and may also result in poor winding shape. Such a situation also occurs in the unit rollers 5a and 5b.

In view of the above-mentioned prior art, the invention BA makes the difference between the strips formed at the tip of the strip or the circumferential surface of the wound strip and the collision with the unit roller to prevent the strip from being damaged. The purpose is to provide strip tip tracking P2 position. The present invention achieves the above object.1. The rotation angle or rotation speed of the pinch roller, the acceleration of the unit roller, the unit roller f: the position of the tip of the strip after passing, and the amount of slack in the string determined from the speed of the strip. The first point (foundation) of the technical idea is to determine the position 79 of the tip of the strip from the amount of weight.

The present invention will be explained in detail below.

Figure 3 shows an embodiment of the present invention. As shown in the figure,
The pinch roller 2 and the mandrel 3 are each equipped with rotation detectors 18 and 19, each of which is a pulse generator that detects the rotation angle or rotation speed. Further, the unit roller frame 6 supporting the unit roller 5 is provided with an acceleration detector 21 for detecting the acceleration of the unit roller 5, and the unit frame 9 is provided with an infrared temperature detector 20. Similarly, although not shown, a company speed detector and an infrared temperature detector are also provided around the unit roller 5a and around the unit roller 5b, respectively. Furthermore, a front end detector 17 is installed in front of the pinch roller 2. And rotation detector engineer 8
A pulse signal corresponding to the rotation angle or rotation speed of the pinch roller 20 is sent out, and a pulse signal corresponding to the rotation angle or rotation speed of the mandrel j is sent out from the rotation detector 19. The detector 21 sends out a signal indicating that the high-temperature IJ tag has passed the unit roller 5, the acceleration detector 21 sends out a signal corresponding to the acceleration of the unit roller 5, and the tip detector 17 A signal indicating that the strip 4 has been sent is sent from tt1. The above signals are input to the computing unit 16.) The time at which the tip of the IJ knob reaches the position of the following unit roller is known. (This operation will be explained later).

Using this calculation result, the control device 15. Hydraulic equipment 14
A control mechanism consisting of a hydraulic cylinder 11 and the like causes each unit roller 5* to be moved just before the tip of the strip reaches the unit roller position of each unit roller 5, 5a, 5b.
5at 5be is released to avoid the strip step from colliding with the unit roller, and after the strip 4 passes the unit roller position, the unit rollers 5, 5a.

5b can be quickly pressed to ensure a predetermined pressing force. By such an operation, it is possible to avoid the strip level difference without causing the strip level difference to collide with the unit rollers 5, 5a, 5b, and the strip level difference can be realized.
It is possible to reduce scratches on the strip 4 caused by collisions between the strips 5a and 5b, and to ensure the pressing time, it is possible to reduce scratches and improve the winding appearance.

Here, the principle of the above-mentioned tip position tracking will be explained with reference to No. 41\l. The amount by which the strip 4 is fed by the pinch roller 2 can be calculated from the signal of the rotation detector 18 attached to the shaft of the pinch roller 2.
The position of the tip of the J-tube is determined as the amount of feed of the strip 4 from the pinch roller 2. The gap generated when the pinch roller 2 feeds the strip 4 is a function of the strip speed at the time when the infrared temperature sensor 2 attached to the unit frame 9 detects the strip 4.
Using all the distances between the sag moon and the binder roll 2 and the mandrel 1, find and correct the slack correction value. Further, when the strip 4 passes the unit roller 5, if a signal is generated in the acceleration detector 21 placed on the exit side of the unit roller 5, this signal is compared with the output of the infrared temperature detector 20. Calculate the reference value, calculate the amount of slack found as a function of the speed of the strip 4, the distance between the pinch roller 2 and the mandrel 1), and the amount of slack between the pinch roller 2 and the strip 40. The strip tip position R determined as the feed amount of the strip 4 from ~22 is corrected.

The following sequential unit rollers 5a, 5b are stripped 4
The strip tip position can be determined while correcting the strip tip position each time the strip passes.

The tip detector 17 is used to predict the time I-2 for the strip 4 to get caught in the pinch roller, and to generate an emergency signal U7 when the rotation detector 18 of the pinch roller 2 malfunctions if possible. Also, is the rotation e set on mandrel 1? ) 19 is used for tracking the tip of the strip 1-IJ at the time when the speeds of the strip 4 and the mandrel l are synchronized.

This has been specifically explained above along with the embodiments. 1: Since the height of the strip tip Kl can be tracked, collision between the strip step and the unit roller can be avoided, and the strip will not be damaged.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1(t) is a schematic diagram showing a conventional winding device, Fig. 2 is an explanatory diagram showing its mode during winding, and Fig. 3 is a schematic diagram showing an embodiment of the present invention. , FIG. 4 is an explanatory diagram for explaining the principle of operation. In the drawing, l is a mandrel, 2 is a pinch roller, 4 is a strip, 5.5a, 5b are cornit rollers, 11 is a hydraulic cylinder, 12/r1. Piston, 13 actuators, 14 is a hydraulic system, 15 is a control device, 6 is a computing unit, 17 is a tip detector, 18.19 is a rotation detector, 20 is an infrared temperature detector, 21 is an acceleration detector . Patent applicant: Mitsubishi Heavy Industries, Ltd. Lee M Representative Patent Attorney Mitsuishi Shibu

Claims (1)

[Claims] A pinch roller that guides the hot strip, a mandrel that winds up the strip, a plurality of unit rollers arranged around the mandrel that presses the strip toward the mandrel, and a plurality of unit rollers that move forward to press the strip. Move back and away from the strip [1
The winding device is equipped with a control mechanism provided on each unit roller so as to rotate the winder! The strip tip tracking device includes a rotation detector installed on the pinch roller and transmitting a signal corresponding to the rotation angle or rotation speed of the pinch roller, and a rotation detector that detects the entire acceleration of the unit roller and responds to this acceleration. an acceleration detector that sends a signal; a temperature sensor that detects that the tip of the strip has passed through unit o5 and sends a signal; and signals sent from the rotation detector, acceleration sensor, and temperature sensor. A winding device comprising: a nailer that calculates the position of the tip of the strip from the length and slack of the string determined from each signal and the speed of the strip, and sends the calculation result to the control mechanism. strip tip tracking device.