JPH084828B2 - Line of output equipment for cold rolling process line - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line of equipment for straightening a warp in the longitudinal direction of a cold rolled steel strip on the exit side of a cold rolled steel strip process line.

[0002]

2. Description of the Related Art In recent years, cold-rolled steel strip process lines have become facilities for which automation and continuation techniques have been further improved for the purpose of quality improvement and productivity improvement. As for the line configuration, although the facility configuration of the central section differs depending on the processing content on that line, the facility configuration on the inlet side and the facility configuration on the outlet side are the same and there is no great difference.

FIG. 5 shows a typical equipment layout of a straight line processing line, and FIG. 6 shows a typical equipment layout of a turnback processing line. In either case, loopers 3 and 4 are provided on the inlet and outlet sides of the central section 2 in order to keep the processing conditions constant. The number of payoff reels 5 and tension reels 6 installed varies depending on the processing capacity of the line. Since the entrance side equipment is continuously processed in the central section 2, the defective part of the cold-rolled steel strip (hereinafter referred to as strip) 1 is removed by the entrance side shear 7 and welded by the welder 8 for continuous connection. The equipment on the delivery side inspects the products that have been processed, and the output side shears 9 for each order.
The equipment is divided by and wound up. In the figure, 10 is a notcher and 11 is an oiler.

In the above strip process line, up to the connection of the strip 1 with the welder 8 on the inlet side,
Further, after the cutting by the shear 9 on the delivery side, the strip 1 is passed through in a separated state, so that there is a problem that the tip of the strip 1 hits a guide, an apron or the like during the passing or is caught. However, there was a problem in that the operation of the central section 2 was hindered.

Further, the strip 1 is wound around a large number of rolls and repeatedly bent to generate internal strain, which causes warpage. In the middle of the line, since the strip 1 is continuous, there is a warp in the plate width direction (C warp), but after cutting at the outlet shear 9, a warp with a large radius of curvature in the longitudinal direction (hereinafter referred to as L warp). It causes a problem in the threading after shear cutting.

Various measures have conventionally been taken against these problems. With respect to the problem of correcting winding curl at the tip end portion of the strip coil and improving stripability in the entrance side equipment, for example, JP-B-61-57088, JP-A-56-5
Devices such as 6727 and Japanese Patent Laid-Open No. 61-132218 have been proposed, and this problem has been almost solved.

Further, in the outlet side equipment, a shearing device capable of correcting the tip of the strip into a nose-bent shape suitable for winding when the strip is sheared is a practically open shearing machine 60-1.
Proposed and implemented in 09813. However, the problem of the L warp that occurs after cutting at the delivery side shear 9 has not been solved yet.

[0008]

DISCLOSURE OF THE INVENTION The present invention can prevent the tip of the strip from sticking out or protruding when tensionless stripping is performed after the shearing at the delivery side due to the L warp of the strip as described above. The purpose is to provide a line of equipment.

[0009]

The present invention provides a tension generator for a continuous process such as a bridle roll (12) in order from the upstream side in an outlet side facility of a cold rolling process line,
A load cell (17), a roller leveler (16, 16 '), a pinch roll (14), and a strip output side shear (9) are arranged, and the roller leveler is a pair of rolls (16a, 16b, 16d, 16d).
16e) and one roll (16c, 16f) facing the roll
Each of the pair of rolls is arranged on the L-warp side of the steel plate before the roll passage, and the tension generator side rolls (16b, 16e) of the pair of rolls.
Are arranged on the load cell (17) in the cold rolling process line.

[0010]

The roll diameter of the cold-rolling process line is determined by the following formula (1) that prevents the waist from breaking when the strip is wrapped around the roll, depending on the material and plate thickness of the strip processed in the line. Diameter.

[0011]

[Equation 1]

Here, D: roll diameter, t: plate thickness, E: Young's modulus, Yp: yield stress, β: coefficient. Basically, the roll diameter D that satisfies the above formula is selected, but other factors such as empirical factors, roll commonality, driving force, and economic efficiency also come in, and the final roll size is determined to be as small as possible. To be done. In this way, basically, the roll diameter is selected so that plastic strain does not occur in the strip even if the strip is wound around the roll, but in reality bending causes the internal stress state of the strip to change and warpage occurs. To do. The thicker the strip, the more significantly the warp occurs. The warp in the middle of the line may be a problem, but as described above, the warp of the strip after being cut by the outlet shear becomes the L warp, which causes trouble to the strip.

The L-warp occurs in a substantially constant direction depending on whether the surface of the strip wound around the deflector roll or the bridle roll final roll before the exit shear is the front side or the back side. For example, FIG. 7 is an enlarged view of the outlet equipment of FIG. 5, and in this arrangement, the winding direction of the strip 1 around the final roll 12a of the bridle roll 12 before sheer, that is, the warp. Become.

Further, FIG. 8 is an enlarged view of the outlet equipment of FIG. 6, and in this arrangement, the strip 1 is wound around the deflector roll 13, that is, the warp is performed. In FIGS. 7 and 8, 9 is an exit side shear, and 14 is a shear front pinch roll.

Therefore, as a device for correcting the L warp in the present invention, one unit is provided in one of the vertical direction with respect to the strip.
It is necessary to arrange a roller leveler having two rollers on the book and the other on the other side so as to correct the warp direction.
FIG. 3 is an apparatus train for correcting the L warp that occurs in the equipment of FIGS. 5 and 7, so that the upper warp of the lower roll 15c of the sheer front bridle roll 12 can be corrected by winding the final roll 12a. The roller leveler 15 having the upper rolls 15a and 15b arranged in front and back is installed, the strip 1 is passed between the upper rolls 15a and 15b and the lower roll 15c of the roller leveler 15, and the lower roll 15c is bent from the back side of the strip 1, Correct the above warp. FIG. 1 shows a layout of the device of the present invention in which the function of the device for correcting the warp in FIG. 3 and the tension detecting device (load cell) are combined. As shown in FIG. 1, the tension generated by the bridle roll 12, the shear front pinch roll 14 and the lower roll 16c is
L is detected by using load cell 17 with roll 16b
The amount of warp can be estimated to determine the amount of reduction of the lower roll 16c.

Similarly, FIG. 4 is an apparatus train for correcting the L warpage that occurs in the equipment of FIGS. 6 and 8. In this case,
Roller leveler 15 'with lower rolls 15d and 15e arranged before and after upper roll 15f is installed, and lower roll of roller leveler 15' is installed.
Pass strip 1 between 15d and 15e and upper roll 15f,
Bend from the surface side of strip 1 with upper roll 15f,
Correct the warp.

FIG. 2 is a layout view of the device of the present invention in which the function of the device for correcting the warp in FIG. 4 and the tension detecting device (load cell) are combined. As shown in FIG. 2, the tension generated by the bridle roll 12, the shear front pinch roll 14 and the upper roll 16f is detected using the load cell 17 in which the roll 16e is arranged, and the amount of L warp is estimated,
The amount of reduction of the upper roll 16f can be determined.

[0018]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a layout diagram of an embodiment in which the present invention is applied to the conventional linear processing line shown in FIGS. In FIG.
From the upstream side, the bridle roll before shear 12, the tension meter (load cell) 17, the roller leveler 16, the pinch roll 14, and the outlet shear 9 are arranged in this order. In this embodiment, as shown in FIG. 1, the roller leveler 16 is composed of a pair of rolls 16a and 16b and a roll 16c facing the rolls, and the pair of rolls 16a and 16b.
Are arranged on the L-warp side of the steel plate before the roll threading. Further, of the pair of rolls, the roll 16b on the sheer front bridle roll 12 side is disposed on the load cell 17.

The bridle roll 12 is a device for generating tension for a continuous treatment process such as a continuous electroplating line. Laura leveler 16 bridle roll
The upper rolls 16a and 16b of the roller leveler 16 are for correcting the warp caused by the winding of the 12 final rolls 12a.
Strip 1 between the lower roll 16c and the lower roll 16c
Bend from the back side of the roll with the lower roll 16c to correct the above warp. As shown in FIG. 1, the bridle roll 12
The tension generated by the front pinch roll 14 and the lower roll 16c is applied to the load cell 17 in which the roll 16b is arranged.
It is possible to determine the amount of L warp and to determine the amount of reduction of the lower roll 16c.

FIG. 2 is a layout view of an embodiment in which the present invention is applied to the conventional folding processing line shown in FIGS.
In FIG. 2, from the upstream side, the bridle roll before the sheer
12, the deflector roll 13, the tensiometer (load cell) 17, the roller leveler 16 ', the pinch roll 14, and the delivery side shear 9 are arranged in this order. In this embodiment, as shown in FIG. 2, the roller levelers 16 'are a pair of rolls 16d.
16e and one roll 16f facing the roll, and each of the pair of rolls 16d and 16e is arranged on the L-warp side of the steel plate before the roll is threaded. Further, the roll 16e on the deflector roll 13 side of the pair of rolls is arranged on the load cell 17. The roller leveler 16 'is for correcting the warp caused by the winding of the deflector roll 13, and includes the upper roll 16f and the lower roll.
The strip 1 is passed between 16d and 16e, and the upper roll 16f is bent from the front side of the strip 1 to correct the warp.

As shown in FIG. 2, the bridle roll
12 and the shear front pinch roll 14 and the tension generated by the upper roll 16f are applied to the load cell in which the roll 16e is arranged.
It is possible to determine the amount of L warp by detecting the amount of warp by using 17, and to determine the amount of reduction of the upper roll 16f.

[0022]

As described above, according to the equipment row of the present invention, the L warp of the strip caused by the winding of the bridle roll before the sheer or the deflector roll can be effectively corrected, and after the cutting at the sheer on the outgoing side, In tensionless conveyance, it can be passed through without causing problems such as bumping and protrusion.

Further, when the strip wound with the L-warp still generated is subjected to the cutting plate processing of the coil wound by the tension reel in the next step, the L-warp occurs according to the present invention. It has disappeared and the process of the next step has become easier.

[Brief description of drawings]

FIG. 1 is a layout view of an apparatus showing an embodiment of the present invention.

FIG. 2 is a layout view of an apparatus showing an embodiment of the present invention.

FIG. 3 is a layout view of an apparatus for correcting L-warp.

FIG. 4 is a layout view of an apparatus for correcting L-warp.

FIG. 5 is a typical arrangement example of a linear processing line of a cold rolling process line.

FIG. 6 is a typical arrangement example of a folding processing line of a cold rolling process line.

FIG. 7 is an enlarged layout view of the outlet facility of FIG.

FIG. 8 is an enlarged layout view of the outlet equipment of FIG.

[Explanation of symbols]

 1 strip 2 center section 3 entrance looper 4 exit looper 5 payoff reel 6 tension reel 7 entrance side shear 8 welder 9 exit side shear 10 notcher 11 oiler 12 sheer front bridle roll 12a sheer front bridle roll final roll 13 deflector roll 14 Front Pinch Roll 15 Roller Leveler 15 'Roller Leveler 15a Top Roll 15b Top Roll 15c Bottom Roll 15d Bottom Roll 15e Bottom Roll 15f Top Roll 16 Roller Leveler 16' Roller Leveler 16a Top Roll 16b Top Roll 16c Bottom Roll 16d Bottom Roll 16e Bottom Roll 16f Top Roll 17 Tensiometer (load cell)

Claims (1)

[Claims] 1. In a cold rolling process line outlet facility, a tension generator for a continuous process such as bridle rolls (12), a load cell (17), a roller leveler (16, 16 '), and a pinch in order from the upstream side. A roll (14) and a strip output side shear (9) are arranged, and the roller leveler includes a pair of rolls (16a, 16b, 16d, 16e) and one roll (16c, 16f) facing the roll. Each of the pair of rolls is arranged on the L-warp side of the steel plate before passing the roll, and the rolls (16b, 16e) on the tension generator side of the pair of rolls are load cells ( 17) An outlet side equipment line of a cold rolling process line, which is arranged above.