JP4146137B2 - Hot-rolled plate pickling and finishing equipment and pickling and finishing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pickling and adjusting apparatus and method capable of performing not only pickling of strips (strips) of a hot-rolled sheet in strip units but also adjusting in a single line.
[0002]
[Prior art]
In the conventional method, strips (strips) of coiled hot-rolled sheets are unrolled from the uncoiler in strip units, pickling tanks that remove the oxide film on the surface, water-washing tanks that clean the surface, and dryers that dry the surface. After the treatment with the pickling apparatus consisting of the following, both ends (ears) in the width direction of the strip are cut (hereinafter referred to as “ear cuts”), and the strip is wound up into a coil in a coiler.
[0003]
In addition, when the strip unwound from the uncoiler is divided into a plurality of strips in the longitudinal direction and rewinded to the coiler in divided strip units, (1) the strip is divided in the longitudinal direction before the pickling tank, (2) The strip upstream from the dividing point (hereinafter referred to as the preceding strip) is divided, pickled, washed with water, dried, then stripped, and finally coiled back into a coiler. (3) The strip downstream from the dividing point (hereinafter referred to as the trailing strip) waits (stops) in front of the pickling tank until the strip is discharged from the coiler after completion of rewinding of the preceding strip. After paying out from the coiler, the plate is started again, pickled, washed and dried, strip stripped, and coiled around the coiler again. The reason why such a complicated process is required is that when the strip is stopped (stopped) in the middle of the pickling apparatus, a surface defect called so-called yellowing is generated.
[0004]
[Problems to be solved by the invention]
The above-described conventional method has the following several problems.
First, the final appearance inspection of the strip is not possible. The tension applying device necessary for rewinding to the coiler is generally composed of three bridle rolls. In this method, a binding force is generated in the strip width direction by the bridle rolls, immediately after the free loop. If the distance between the ear-cutting device and the ear-cleaving device installed is short, interference will occur with the binding force in the width direction of the strip of the ear-cleaving device. I had to install it. Using the space between the ear clip device and the bridle roll, an inspection table is installed to inspect the appearance of the strip. In this case, the strip is wound around the bridle roll and the tension necessary for rewinding it to the coiler is applied, and the burrs generated when the strip is cut off often cause wrinkles on the bridle roll. In this inspection table, the final inspection of the strip wound around the coiler could not be performed. For this reason, after winding around a coiler, another recoiling line was passed through and a final inspection had to be performed.
[0005]
Second, even if the occurrence of a defective portion is found by visual inspection on the inspection table, the strip portion must be stagnated in the pickling apparatus while the defective portion is cut and removed by the exit side shearing machine. As a result, surface defects such as yellowing occurred and it was difficult to sufficiently remove defective portions. Although a free loop is installed in front of the ear-cutting device, this is an initial operation of the ear-cutting device (setting of the shear blade of the ear-cutting device to the strip width direction position, biting of the shear blade into the strip, The strip in the pickling machine is used to move slowly without stopping even if the strip tip is stopped during post-processing of the cut ears). I couldn't use it.
[0006]
Thirdly, if the strip is divided into a plurality in the longitudinal direction, the divided subsequent strip is before the pickling tank until the divided preceding strip is rewound around the coiler and discharged from the coiler. Productivity was significantly hindered due to waiting.
[0007]
Thus, with the conventional pickling method for strips of coiled hot-rolled plates, it has been difficult to obtain a strip of good quality in a single step with high productivity.
SUMMARY OF THE INVENTION An object of the present invention is to provide a hot-rolled sheet pickling / settling apparatus and a pickling / settling method that can produce a high-quality strip in a single step with high productivity.
[0008]
[Means for Solving the Problems]
The gist of the present invention is as follows:
(1) In a hot-rolled sheet pickling and finishing device, an uncoiler for unwinding a coiled strip, an inlet shear device for cutting the leading end of the unwound strip, and the surface of the strip The pickling device to remove the scale, the ear-slicing device to cut both ends (ears) in the width direction of the pickled strip, and the tension necessary to rewind the ear-striped strip into a coil. A tension applying device, an inspection table for inspecting the external shape of the strip, a stripping device for cutting and removing the defective portion of the strip based on the result of the inspection table, and dividing the strip in the longitudinal direction, and the defective portion unrealized said tensioning device and a coiler for cutting and removing strips for take again wound into a coil is pressed from above and below the strip without constraining the plate width direction of the strip And by an application of a tension, trimmed device, tensioning device, examination table, exit side shear device pickling, finishing line equipment for hot-rolled sheet, I characterized in that it is arranged in order.
( 2 ) In the hot-rolled sheet pickling apparatus according to (1), the width direction of the strip is upstream or / and downstream of a tension applying device that applies tension necessary for rewinding the strip. A hot-rolled sheet pickling and refining device, characterized in that a side guide for regulating the movement of the hot-rolled sheet is provided.
( 3 ) In the hot-rolled sheet pickling apparatus as described in (1) or (2) above, the hot-rolled sheet pickling / refining apparatus is characterized in that the exit side shearing machine is a running shearing machine. .
( 4 ) In the pickling and refining method for hot-rolled sheets, the coiled strip is unwound, the leading end of the unwound strip is cut, the scale on the surface of the strip is pickled, and the coil Cut both ends (ears) in the width direction, give the strip the necessary tension to rewind it in a coil shape, perform an appearance inspection of the pickled strip, and cut and remove the defective part based on the appearance inspection result Then, the strip from which the defective portion has been cut and removed is re-wound into a coil shape, and processed in the order of cutting both ends (ears), applying tension, visual inspection, and cutting and removing the defective portion. Pickling and refining plate.
( 5 ) In the hot-rolled sheet pickling and finishing method described in ( 4 ) above, the cutting and removal of the defective portion of the strip is performed between runs at a strip passing speed of 30 mpm or more. Pickling and refining method for sheet metal.
It is.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a semi-schematic isometric view of a typical prior art pickling facility for pickling coiled hot strip strips. It should be understood that such a line is more complex than that shown.
[0010]
However, the main elements of such a line are the uncoiler 1 for loading and unwinding the coiled hot-rolled strip 60, correcting the shape of the strip tip, Tip treatment device 2 for facilitating the plate and assisting the passage of the strip, shearing of the strip tip, splitting in the longitudinal direction of the strip, shearing of the tail of the strip, shearing of the tail of the strip, the strip tip is an acid Corner shearing machine 9 that cuts off the corners of the ends of the strips so that it can be easily passed through the washing tanks 10A to 10C and the washing tanks 11A to 11C, and pickling tanks 10A to 10C used to remove scales from the surface of the strips , Water washing tanks 11A to 11C for cleaning the acid and scale remaining on the surface of the pickled strip, and drying the surface of the strip whose surface has been cleaned A layer 12, an edge cutting device 15 for cutting the strip, an inspection table 16 for inspecting the surface appearance of the strip, a portion where the corner of the strip is cut by the corner shearing machine 9, and a sample are repeatedly cut and removed in batches. It consists of a side shearing machine 17 and a coiler 18 for rewinding the strip into a coil.
[0011]
In addition, ringer rolls 31A to 31J in which a pair of upper and lower rolls are stacked are installed on the entrance / exit side of each pickling tank / water washing tank to assist the passage plate of the strip 60 and strip the pickling liquid / water washing liquid. Is prevented from taking out.
Further, an upstream free loop 6 and an outgoing free loop 14 are installed with the side guides 32A and 32B upstream of the corner shearing device 9 and the edge cutting device 15, respectively. Control is performed so that the center position in the width direction of the strip 60 is the line center at the 15 entrance positions. When passing the leading end of the strip, the leading end passing plate devices 41 and 42 are raised to the pass line position of the strip, the leading end passes through the leading end passing plate devices 41 and 42, and the pinch rolls 30A and 30C are passed. , The leading edge passing plate devices 41 and 42 are lowered to form a free loop, and when the trailing edge of the strip reaches just before the leading edge processing device 2 and the pinch roll 30B in front of the free loop, the leading edge again The devices 41, 42 are raised to the pass line position of the strip and the tail end is passed through.
[0012]
In such pickling equipment, in principle, the strips 60 unwound from the uncoiler 1 are sequentially sent downstream to be processed in strip units.
First, the front end of the strip 60 is sent to the front end processing device 2, and the defective portion (crop or the like) at the front end is removed by the entry side shearing machine 3. Next, the sheet is fed by a pinch roll 30A, guided to the corner shearing machine 9, and the corner at the tip of the strip is cut and sent downstream. Further, the tip end of the strip is passed through the pickling tank, the water washing tank and the dryer while being sequentially fed by the ringer rolls 31A to 31J and the pinch rolls 30B and 30C, and is temporarily stopped in front of the ear-cutting device 15, and then the ear-cutting device 15 After the initial operation, the plate is re-threaded while the ear is cut by the ear cut device 15, and further fed by the bridle roll 25 and the deflector pinch roll 33 to reach the coiler 18 and rewinding is started. Finally, the entire length of the strip is re-wound around the coiler 18. The strip is paid out from the coiler after rewinding to the coiler.
The inspection table 16 performs a simple appearance inspection, and also serves as a preparation work for a refining work in a recoiling line performed in the next process.
[0013]
The strip to be processed next is loaded on the uncoiler 1 while the tail end of the strip being processed passes through the uncoiler 1, reaches the coiler 18, and is rewinded. Then, it is led to the corner shearing machine 9, the corner at the tip of the strip is cut, and it passes through to the pickling tank entrance side, and waits (stops). After the strip being processed is discharged from the coiler 18, the next strip to be processed that is waiting before the pickling bath is re-passed from the pickling bath.
[0014]
In addition, when dividing the strip 60 in the longitudinal direction, it is divided by the entry side shearing machine 3. At this time, while the divided preceding strip is rewinded around the coiler 18, the divided subsequent strip is fed by the pinch roll 32A and guided to the corner shearing machine 9, where the corner of the end of the strip is cut, and the pickling tank Pass through to the entry side and wait (stop). It is common for the trailing strip to be re-passed from the pickling tank after the leading strip has been dispensed from the coiler 18.
The strip discharged from the coiler is sent to the recoiling line, which is the next process, and is subjected to final inspection and cutting / removal of defective parts (refinement work) to become a final product.
[0015]
FIG. 2 is a semi-schematic isometric view of a coiled hot-rolled sheet pickling and adjusting apparatus according to one embodiment of the present invention. Compared with the conventional line in FIG. 1, (1) a thickness gauge 13 is installed at a position between the dryer 12 and the pinch roll 30B, and (2) an equipment configuration between the edge-cutting device 15 and the deflector roll 33. However, the difference is that the tension applying device 26, the inspection table 16 ', and the exit side running shear 27 are arranged in this order, and (3) the two coilers 18 and 19 are arranged.
The line in FIG. 2 is similar to the line in FIG. 1, and the same parts are given the same numbers.
[0016]
The thickness gauge 13 is for final inspection of the thickness of the strip 60. The defective portion is cut and removed by the downstream exit side shearing machine 27 and discharged to the waste disposal carriage 52 '. The waste disposal cart 52 'has a large capacity so that the defective portion can be sufficiently removed as compared with the conventional one.
[0017]
The tension applying device 26 does not restrain the strip width direction of the strip, but has a structure for pressing the strip up and down. Even if it has a structure that owns the drive system itself, it does not own the drive system and may secure the tension of the strip with the coiler. Since there is no restraining force in the plate width direction, it does not interfere with the upstream ear clip device 15 and the side guide 30C, and can be installed immediately after the ear clip device 15 downstream. In addition, since the strip is pressed up and down and is not wound around the strip, the ear-cutting device 15 is less likely to be damaged by burrs on the ears of the strip, and the impact of the dust on the strip is also minimal. is there.
[0018]
The inspection table 16 ′ is disposed downstream of the tension applying device 26, and there is no roll around which the strip is largely wound on the downstream side of the inspection table 16 ′, so that the appearance of the strip 60 can be finally inspected. . On the basis of the inspection result, the defective portion is deleted by the downstream exit side running shear 27 and discharged to the waste disposal cart 52 ′. Since this inspection table is the final inspection, the length is longer than the conventional one. In addition, it is also effective to arrange automatic inspection equipment such as flaw detection as necessary.
[0019]
The exit side shearing machine 27 cuts and removes a defective portion such as the thickness and appearance of the strip 60 without stagnation of the strip in the pickling section, and is performed at a strip passing speed of 30 mpm or more. . If it is less than 30 mpm, yellowing may occur at the pickling section. At this time, the plate passing speed of the pickling strip is reduced to the running shear speed (exit side).
Two coilers 18 and 19 are installed and used alternately.
[0020]
In this pickling facility, the strip 60 unwound from the uncoiler 1 is sequentially sent downstream to be processed.
First, the front end of the strip 60 is sent to the front end processing device 2, and the defective portion (crop or the like) at the front end is removed by the entry side shearing machine 3. Next, the sheet is fed by a pinch roll 30A, guided to the corner shearing machine 9, and the corner at the tip of the strip is cut and sent downstream. Further, the tip of the strip is passed through the pickling tank, the water washing tank and the dryer while being sequentially fed by the ringer rolls 31A to 31J and the pinch rolls 30B and 30C, and is temporarily stopped in front of the ear-cutting device 5, and the ear-cutting device 15 After the initial work, the plate is re-passed while cutting off the ear with the ear-cutting device 15, further passing through the tension applying device 26, being inspected with the inspection table 16 ′, and further fed with the deflector pinch roll 33, and the coiler 18. To start rewinding. Finally, the entire length of the strip is re-wound around the coiler 18. The strip is paid out from the coiler after rewinding to the coiler.
[0021]
If a defective portion of the strip 60 is found by appearance inspection using the thickness gauge 13 and the inspection table 16 ', the defective portion is cut and removed by the exit side shearing machine 27 and discharged to the exit side waste disposal cart 52'. During continuous cutting / removal of defective parts by the delivery-side feed shearing machine 27, the sheet feeding speed in the pickling apparatus for the strip is reduced to the cutting / removal speed of the delivery-side running-cutting machine 27.
[0022]
When the defective portion is cut and removed, the strip 60 starts to be rewound around the remaining unused coiler. In this way, even when the defective portion is cut and removed, the defective portion is not regenerated, and a high-quality strip can be rewinded around the coiler.
[0023]
The strip to be processed next is loaded on the uncoiler 1 while the tail end of the strip being processed passes through the uncoiler 1, reaches the coiler 18, and is rewinded. Then, it is led to the corner shearing machine 9, the corner at the tip of the strip is cut, and it passes through to the pickling tank entrance side, and waits (stops). When it becomes clear that the strip being processed can be processed by the coiler in use, it is possible to re-pass the strip to be processed next from the pickling tank before the pickling tank, greatly increasing productivity. Improved.
Further, when the strip 60 inserted into the uncoiler 1 is divided in the longitudinal direction, the strip division at the time of occurrence of a defective portion is the same. It is possible to suppress a decrease in productivity due to the division.
[0024]
It should be noted that the present invention does not necessarily assume that the strip is trimmed, and is effective even when the strip is not trimmed.
It is also effective to perform skin pass rolling and / or leveler treatment before pickling for the purpose of facilitating passage of the strip 60 in the pickling apparatus and improving pickling performance. In particular, when the thickness of the hot-rolled strip is thin and the shape is unstable, this effect is very large.
[0025]
FIG. 3 is a semi-schematic isometric view of a coiled hot-rolled sheet pickling apparatus according to another embodiment of the present invention. 2 except that a coil pretreatment device 56 is installed on the line entry side and a carousel reel 20 is installed on the line exit side instead of the two coilers.
[0026]
Before loading the coiled strip 60 on the uncoiler 1, the coil pre-processing device 56 cuts and removes the defective portion of the tip of the strip 60. By this pre-processing, the strip end processing time after strip loading on the uncoiler 1 is shortened, and at the pickling device position, the leading end strip of the strip to be processed next is completed from the completion of the trailing end strip passing through the strip. It is possible to shorten the waiting time until the start and further improve the productivity.
In addition, by installing a carousel reel on the exit side, the number of rolls in contact with the strip 60 can be reduced, and wrinkles caused by the rolls can be further reduced.
[0027]
Regardless of which example of the present invention is employed, it has become possible to process from pickling the strip of hot-rolled sheet to final inspection and cutting / removing the defective portion in one line.
[0028]
【The invention's effect】
According to the pickling, refining and method according to the present invention, it becomes possible to manufacture a strip of good quality in a single step with high productivity. Moreover, even if it divides | segments in a longitudinal direction within a coil, it is possible to ensure the same good quality and substantially the same productivity as when not dividing.
[Brief description of the drawings]
FIG. 1 is a semi-schematic isometric view of a typical prior art pickling facility for pickling hot rolled sheets.
FIG. 2 is a semi-schematic isometric view of a hot-rolled sheet pickling and finishing apparatus according to one embodiment of the present invention.
FIG. 3 is a semi-schematic isometric view of a hot-rolled sheet pickling and finishing apparatus according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Uncoiler 2 Tip processing device 3 Inlet side shearing machine 6 Inlet side free loop 9 Corner shearing machine 10A, 10B, 10C Pickling tank 11A, 11B, 11C Washing tank 12 Dryer 13 Thickness gauge 14 Outlet free loop 15 Ear-cutting device 16, 16 'Inspection table 17 Outgoing shearing machine 18, 19 Coiler 20 Carousel reel 20A, 20B Carousel reel coiler 25 Bridle roll 26 Tension applying device 27 Outgoing feed shearing machines 30A, 30B, 30C Pinch rolls 31A, 31B , 31C, 31D, 31E, 31F, 31G, 31H,
31I, 31J Ringer rolls 32A, 32B Side guides 33, 34 Deflector pinch rolls 41, 42 Tail end plate devices 51, 52, 52 'Waste treatment cart 56 Coil pretreatment device 60 Strip

Claims (5)

In the hot-rolled sheet pickling and refining device, an uncoiler that unwinds a coiled strip, an inlet shear device that cuts the leading end of the unwound strip, and a scale on the surface of the strip The pickling device to be removed, the ear-cutting device for cutting both ends (ears) in the width direction of the pickled strip, and the tension that gives the tension necessary to rewind the ear-cut strip in a coil shape An application device, an inspection table for inspecting the external shape of the strip, a defective portion of the strip based on the result of the inspection table, cutting and removing the strip, a shearing device for dividing the strip in the longitudinal direction, and a cutting and cutting of the defective portion the removed strip saw including a coiler for taking again wound into a coil, the tension device is to be pressed from the upper and lower strip without constraining the plate width direction of the strip More application of a tension, trimmed device, tensioning device, examination table, exit side shear device pickling, finishing line equipment for hot-rolled sheet, characterized in that it is arranged in order. 2. The hot-rolled sheet pickling apparatus according to claim 1 , wherein movement of the strip in the width direction is regulated upstream or downstream of a tension applying device that applies tension necessary for rewinding the strip. A hot-rolled sheet pickling and refining device, characterized in that a side guide is provided. 3. The hot-rolled plate pickling and adjusting apparatus according to claim 1 , wherein the outlet side shearing machine is a running shearing machine. In the hot-rolled sheet pickling and refining method, the coiled strip is unwound, the leading end of the unwound strip is cut, the scale on the surface of the strip is pickled, and the width direction of the coil is cut. Cut both ends (ears), give the strip the necessary tension to rewind it in a coil shape, conduct an appearance inspection of the pickled strip, and cut and remove the defective part based on the appearance inspection result. The strip of which the part has been cut / removed is re-wound into a coil shape, and is processed in the order of cutting both ends (ears), applying tension, visual inspection, and cutting / removing the defective part. Washing and refining method. 5. The hot-rolled sheet acid pickling and finishing method according to claim 4 , wherein the cutting and removal of the defective portion of the strip is performed between runs at a strip passing speed of 30 mpm or more. Washing and refining method.

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