JP2002028703A - Equipment with side trimmer for finishing steel strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment with a trimmer for finishing a steel strip with which the cost of equipment is reduced, cycle time is shortened and defective trimming is prevented. SOLUTION: This equipment is provided with a movable base 20 on which a side trimmer 6 is placed and supported and also with which the side trimmer 6 is integrally moved in the width direction of the steel strip 9, a sensor 5 for detecting the center position in the width direction of the steel strip 9 before trimming the steel strip with the side trimmer 6, a hydraulic cylinder 22 for moving and driving the movable base 20 and a controller 23 for controlling the hydraulic cylinder 22 so that the center in the width direction of the side trimmer 6 is made to coincide with the center in the width direction of the steel strip 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel strip finishing equipment with a side trimmer, and more particularly to an apparatus for moving a side trimmer in a width direction so as to align a center of the steel strip in the width direction with the steel strip.

[0002]

2. Description of the Related Art In a steelmaking plant, as a steel strip finishing equipment of a batch system, for example, a steel strip finishing equipment such as a push-pull pickling line (PPPL) or a slitter line is known. And a side trimmer for trimming unnecessary portions of both side edges of the steel strip.

By the way, before the steel strip is trimmed by the side trimmer, the steel strip must be centered in order to secure a trimming allowance of a predetermined width on both sides of the steel strip.
Various techniques for this purpose have been put to practical use. As the centering technique, there are a technique using a side guide, a technique using a steering roll, and a technique using a combination of these side guide and steering roll (see Japanese Patent Publication No. 3-5926).

[0004] As shown in FIG. 7, the side guide 50 is supported on a slide bed 51 and on the slide bed 51 so as to be movable in the width direction of the steel strip 52, and can guide both side edges of the steel strip 52. A pair of guide members 5 sandwiched between
3, 54, and a screw shaft 55 screwed to the guide members 53, 54. A forward screw is formed in the left half and a reverse screw is formed in the right half. ,
It has a ball screw mechanism having a screw shaft 55 with which each is screwed, and a drive motor 56 connected to one end of the screw shaft 55 and driving the pair of guide members 53 and 54 to open and close.

When the side guide 50 is applied to the steel strip finishing equipment, a looping pit 57 and a pinch roll (not shown) are provided as shown in FIG.
After the tension in the transport direction of the steel strip 52 is released by the above, the steel strip 52 is centered by the side guide 50. Thereafter, the steel strip 52 is pinched by a pinch roll and trimmed by a side trimmer 59.

[0006]

In the centering technique using the conventional side guide, it is necessary to equip the steel strip finishing equipment with a looping pit and a pinch roll, and the equipment cost is higher than in the present invention. In addition, since the pinch rolls are provided, the motor capacity of the entire line increases. Further, since the steel strip must be slackened by the looping pit by a predetermined length, the cycle time is lengthened, and the land conditions for installing the looping pit are restricted. An object of the present invention is to reduce equipment costs in a steel strip finishing equipment, to shorten a cycle time, and the like.

[0007]

The steel strip finishing equipment with a side trimmer according to claim 1 is a steel strip finishing equipment having side trimmers for trimming unnecessary portions of both side edges of a steel strip, wherein the side trimmer is mounted. A movable base that supports and can move the side trimmer integrally in the width direction of the steel strip, a steel strip center detection unit that detects a center position in the width direction of the steel strip before trimming by the side trimmer, and the movable base. And a control means for receiving the detection signal of the steel strip center detecting means and controlling the driving means such that the center of the side trimmer in the width direction is the center of the steel strip in the width direction. It is characterized by the following.

When the steel strip finishing equipment finishes the steel strip, the center position in the width direction of the steel strip is detected by the steel strip center detecting means, and the control means receives this detection signal and receives the detection signal. The driving means is controlled so that the center is the center in the width direction of the steel strip. That is, by moving the movable platform, that is, the side trimmer, by the driving means, the center in the width direction of the side trimmer is matched with the center in the width direction of the steel strip, and unnecessary portions of both side edges of the steel strip are trimmed.

In particular, instead of moving the steel strip in the width direction so that the center in the width direction of the conventional steel strip coincides with the center in the width direction of the side trimmer, a centering function is added to the side trimmer itself, and Since the side trimmer is moved in the width direction according to the change in the band width, the conventional side guide or steering roll is not required. Looping pits, pinch rolls, etc. can also be omitted.

In a second aspect of the present invention, there is provided a steel strip finishing equipment with a side trimmer according to the first aspect of the present invention, wherein a payoff reel for feeding out a coiled steel strip to the side trimmer side and the payoff reel in a width direction of the steel strip. A reel supporting mechanism that movably supports the reel, a reel driving unit that drives the payoff reel to move in the width direction via the reel supporting mechanism, and a steel trimmer passing plate when receiving a detection signal of the steel strip center detecting unit. A reel control means for controlling the reel driving means so that the band position is located at the line center is provided.

In this steel strip finishing equipment, the steel strip is continuously fed from the pay-off reel, the center position in the width direction of the steel strip is detected by the steel strip center detection means, and the reel control means receives this detection signal and receives a side trimmer. At the time of threading, the reel driving means is controlled so that the position of the steel strip is at the line center. Compared to the case where the position control of the payoff reel is not performed, the amount of movement of the side trimmer in the width direction can be made as small as possible.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment relates to a push-pull pickling line (PP
PL) is an example in which the steel strip finishing equipment with a side trimmer of the present invention is applied to (PL). As shown in FIG. 1, the push-pull pickling line 1 (hereinafter referred to as finishing equipment 1) is provided in an installation space having a length of about 100 m and a width of about 20 m including the safety fence 2, and is provided along a transport path. A payoff reel 3, a pickling section 4, a steel strip center detection sensor 5, a side trimmer 6, a bridle unit 7, a tension reel 8, and the like are sequentially provided. The steel strip 9 supplied to the equipment 1 has a thickness of about 1.5 to 3.6 m.
m and a width of about 800 to 1300 mm, and is stretched between the payoff reel 3 and the tension reel 8.

Although not shown, the pickling section 4 occupies about 60% of the entire length of the transport path. In the pickling section 4, the scale of the steel strip surface is removed using an acidic solution such as sulfuric acid or a mixed acid (nitric acid, hydrofluoric acid, etc.).

The side trimmer 6 will be described. As shown in FIGS. 2 to 4, the side trimmer 6 is a device for trimming unnecessary portions on both side edges of the steel strip 9. As shown in FIG. The side trimmer 6 includes a slide bed 10, a pair of round blade holders 11 and 12, two pairs of rotary round blades 13 provided on the round blade holders 11 and 12, and two pairs of rotary round blades. 13
, A ball screw mechanism 15, and a drive motor 16 that symmetrically moves the pair of round blade holders 11 and 12 via the ball screw mechanism 15. As shown in FIG. 4, a pair of round blade holders 11, 1
2 is supported on the slide bed 10 so as to be movable in the width direction at predetermined intervals in the width direction of the steel strip 9, and a pair of upper and lower rotary round blades 13 is rotated by each round blade holder 11, 12. The steel strip 9 is provided so as to be capable of being sheared in cooperation with the steel strip 9.

A screw shaft 17 of a ball screw mechanism 15 is rotatably supported on the slide bed 10 by being screwed into the round blade holders 11 and 12. The screw shaft 17 has a forward screw in the right half and a reverse screw in the left half, and round blade holders 11 and 12 are screwed to the forward and reverse screws, respectively. Screw shaft 1
A gear 18 is fixed to one end of the gear 7, and a pinion gear 19 of an output shaft of a drive motor 16 is meshed with the gear 18 so that the drive motor 16 opens and closes a pair of round blade holders 11 and 12. I have. Although not shown, the two pairs of rotary round blades 13 are linked and connected by a plurality of gears and spline shafts, and are driven synchronously by a rotary drive motor 14.

A rectangular movable base 20 for integrally mounting and supporting the side trimmer 6 is provided. A plurality of wheels 20a are attached to the lower surface of the movable base 20, and the movable base 20 is controlled by the plurality of wheels 20a. The steel strip 9 is supported movably along the pair of rails 21 in the width direction of the steel strip 9. The driving means for moving and driving the movable base 20 will be described. In the vicinity of the movable base 20, a hydraulic cylinder 22 is fixedly installed on the floor side, and a rod of the hydraulic cylinder 22 is connected to the movable base 20;
The side trimmer 6 is configured to move in the width direction via the movable base 20.

The steel strip center detection sensor 5 (hereinafter referred to as sensor 5) as the steel strip center detection means will be described. The steel strip center detection sensor 5 is a sensor that continuously detects the center position in the width direction of the steel strip 9 in a non-contact manner before trimming by the side trimmer 6. The steel strip center detection sensor 5 includes a pair of variable capacitance sensors 5a, each of which detects the side edge of the steel strip 9 and controls the control device based on the detection signals of both variable capacitance sensors 5a. At 23, the center position in the width direction of the steel strip 9 is calculated.

Each variable capacitance sensor 5a is composed of a steel U-shaped frame 31, and a glass plate (insulator) fixed to the inner surface of the U-shaped frame 31 on the steel strip 9 side. The open concave portions of the pair of U-shaped frames 31 are arranged so as to face each other, the side edges of the steel strip 9 are introduced into the open concave portions of each of the U-shaped frames 31, and each of the variable capacitance sensors 5a detects The capacitance between the edge and the edge is measured, and the detection signal is output to the control device 23.

Next, the hydraulic system of the hydraulic cylinder 22 and the control device 23 will be described. As shown in FIG. 4, a hydraulic supply unit 32 including a hydraulic pump, a motor, a tank, and the like,
Control valve 2 with direction switching function and flow control function
4 is connected to the hydraulic cylinder 22. The control device 23 moves the center of the steel trimmer 9 in the width direction calculated based on the detection signal of the steel strip center detection sensor 5 to the center of the side trimmer 6 in the width direction (the rotating circular blade 13 on one side and the rotating circular blade on the other side). The hydraulic cylinder 22 is controlled via the control valve 24 so that the center positions between the blades 13 coincide.

Next, the payoff reel 3 will be described. As shown in FIGS. 1 and 5, the payoff reel 3 has a function of feeding out a steel strip 9 wound in a coil shape to the side trimmer 6 side. A reel support mechanism 25 for supporting the payoff reel 3 so as to be movable in the width direction of the steel strip 9 is provided,
A rotary cylinder 26 is provided as reel driving means for driving the payoff reel 3 to move in the width direction via the reel support mechanism 25.

The reel support member of the reel support mechanism 25 includes:
The steel strip 9 is rotatably driven by a motor 28 via a speed reducer 27 so that the steel strip 9 can be fed and unwound. The piston and the piston rod of the rotary cylinder 26 are integrally connected to the shaft of the reel support member, and the axial position of the reel support member can be adjusted while allowing the piston and the piston rod to rotate.

Next, the hydraulic system of the rotary cylinder 26 and the reel control device 29 will be described. As shown in FIG. 5, a hydraulic supply unit 33 including a hydraulic pump, a motor, a tank, and the like is connected to the rotary cylinder 26 via a control valve 30 having a direction switching function and a flow rate control function. The reel control device 29 receives the detection signal of the steel strip center detection sensor 5 in the side trimmer section, calculates the width direction center of the steel strip 9, and controls the steel strip position to be the line center when the side trimmer is passed. The rotary cylinder 26 is controlled via the valve 30.

Next, the side trimmer 6 of the finishing equipment 1
The operation when trimming the steel strip 9 will be described. The steel strip 9 is continuously fed from the payoff reel 3,
Steel strip center detection sensor 5 in side trimmer section is steel strip 9
Is detected and fed back to the reel control device 29,
Based on the data, the rotary cylinder 29 is controlled via the control valve 30 so that the position of the steel plate when the side trimmer is passed is located at the line center.

Thereafter, immediately before trimming by the side trimmer 6, the control device 23 detects the center position in the width direction of the steel strip 9 based on the detection signal from the sensor 5, and the center of the side trimmer 6 in the width direction is determined. The hydraulic cylinder 22 is controlled via the control valve 24 so as to be located at the center in the width direction. At this time, the movable platform 20 and the side trimmer 6 are moved by the hydraulic cylinder 22 so that the side trimmer 6 is moved.
The center of the steel strip 9 in the width direction is made to coincide with the center of the steel strip 9 in the width direction.

As described above, the centering function is added to the side trimmer 6 itself, and the side trimmer 6 is moved in the width direction in accordance with the change of the band width of the steel strip 9, so that the center of the side trimmer 6 is aligned with the steel strip 9. Since it is made to coincide with the center in the width direction, a conventional side guide or steering roll is not required, and a looping pit, a pinch roll and the like can be omitted. Therefore, it is possible to remarkably reduce the equipment cost in the steel strip finishing equipment, shorten the transport route of the steel strip 9, shorten the overall length of the finishing equipment 1, and reduce the motor capacity even in the entire line. Can be reduced, and the cycle time can be reduced.

The reel controller 29 detects the center of the steel strip 9 in the width direction based on the detection signal from the steel strip center detection sensor 5 and rotates the steel strip 9 to the line center when the side trimmer is passed. Since the cylinder 26 is controlled, the amount of movement of the side trimmer 6 in the width direction can be reduced as much as possible, and the accuracy of aligning the width center of the side trimmer 6 with the width center of the steel strip 9 can be increased.

Next, a modified embodiment in which this embodiment is partially modified will be described. 1) The steel strip finishing equipment of the present invention can also be applied to steel strip finishing equipment with a side trimmer other than the push-pull pickling line. 2) As the steel strip center detecting means, two sets of detectors including a light projector that projects light from below the steel strip near each side edge of the steel strip and a light receiver that receives light from the light projector are applied. It is also possible. In this case, for example, a fluorescent lamp is used as a light emitter, and a photoconductive element such as a CdS cell (cadmium sulfide cell) is used as a light receiver. The CdS cell detects each side edge of the steel strip based on the principle that the internal resistance changes when light is applied. Alternatively, a transmission coil that emits an alternating magnetic field from below the steel strip near each side edge of the steel strip,
An electromagnetic induction type two-set detector including a receiving coil for receiving an alternating magnetic field coming from the transmitting coil may be applied.
In addition, without departing from the spirit of the present invention, it is also possible to implement the above-described embodiment with various modifications.

[0028]

According to the first aspect of the invention, a centering function is added to the side trimmer itself, and the side trimmer is moved in the width direction according to a change in the width or position of the steel strip.
Since the center position of the side trimmer is made to match the center of the steel strip in the width direction, the conventional side guide or steering roll is not required, and the looping pit,
Pinch rolls and the like can also be omitted.

Therefore, the equipment cost of the steel strip finishing equipment can be remarkably reduced, and the transport route of the steel strip finishing equipment, that is, the entire length of the steel strip finishing equipment can be shortened. Motor can be reduced in size, and the cycle time can be shortened. Since the side trimmer has a centering function, it is possible to perform accurate and accurate trimming without erroneous trimming in a state where the center in the width direction of the side trimmer matches the center in the width direction of the steel strip.

According to the second aspect of the present invention, the steel strip is continuously fed from the payoff reel, and the reel control means detects the widthwise center position of the steel strip based on the detection signal from the steel strip center detection means, Since the reel driving means is controlled so that the widthwise center of the payoff reel is the widthwise center of the steel strip, the widthwise movement of the side trimmer can be reduced as much as possible, and the widthwise center of the side trimmer is adjusted to the widthwise center of the steel strip. Accuracy of matching with the center in the width direction can be increased. The other effects are the same as those of the first aspect.

[Brief description of the drawings]

FIG. 1 is a plan view of a steel strip finishing equipment with a side trimmer according to an embodiment of the present invention.

FIG. 2 is a front view of a side trimmer.

FIG. 3 is a plan view of a side trimmer.

FIG. 4 is a configuration diagram showing a configuration of a side trimmer, a detection system, and a control system.

FIG. 5 is a configuration diagram showing a configuration of a payoff reel and a control system.

FIG. 6 is a schematic side view of a conventional steel strip finishing equipment.

FIG. 7 is a schematic plan view of a main part of a conventional side trimmer and side guide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel strip finishing equipment 3 Payoff reel 5 Sensor 6 Side trimmer 9 Steel strip 20 Movable table 22 Hydraulic cylinder 23 Control device 25 Reel support mechanism 26 Rotary cylinder 29 Reel control device

Claims (2)

[Claims] 1. A steel strip finishing equipment having side trimmers for trimming unnecessary portions of both side edges of a steel strip, wherein the side trimmers are placed and supported, and the side trimmers can be integrally moved in the width direction of the steel strip. A movable base, a steel strip center detecting means for detecting a center position in a width direction of the steel strip before trimming by the side trimmer, a driving means for moving and driving the movable base, and a detection signal of the steel strip center detecting means. And control means for controlling the driving means such that the center of the side trimmer in the width direction is the center of the width of the steel strip. 2. A payoff reel for feeding a coiled steel strip to a side trimmer side, a reel support mechanism for supporting the payoff reel movably in a width direction of the steel strip,
A reel driving means for moving the payoff reel in the width direction via the reel supporting mechanism; and a reel for receiving the detection signal of the steel strip center detecting means so that the steel strip position becomes the line center when the side trimmer is passed. 2. The apparatus according to claim 1, further comprising a reel control means for controlling the driving means.
The steel strip finishing equipment with side trimmer according to 4.