JPH07164008A - Pickling-cold rolling equipment - Google Patents

Abstract

PURPOSE:To enable executing the individual operation of pickling equipment and the combined operation with cold rolling equipment at the same time by providing a looper on the outlet side of pickling tank, side trimmer, shear on the outlet side of pickling tank, coiler on the outlet side of pickling tank, uncoiler of cold rolling equipment, welder of cold rolling equipment and looper of cold rolling equipment in order between a pickling tank and a cold rolling mill. CONSTITUTION:In the case that a steel strip 19 is manufactured as a finished product by pickling, the individual operation of pickling is executed and, when pickling is executed in another line like a stailess steel material or in the case of the individual operation of cold rolling, continuous operation is respectively possible even when the cold rolling equipment is individually operated. Then, the degree of freedom in operation is increased, correspondence to special products which have rules on equipment and process is easy, further the generation of defective biting and running-out is restricted at the time of start and completion of operation, the generation of roll mark and off-gage is reduced and operation rate is improved. Since, at the time of continuous operation from pickling to cold rolling, it is not necessary to stop the pickling tank even when the inlet side of the cold rolling equipment is stopped by changing the width of trimmer or the like. Then, the change in color in the pickling tank and over-pickling are not generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, pickling-cold rolling equipment for strip metal plates.

[0002]

2. Description of the Related Art A technique for directly connecting a pickling facility for a strip-shaped metal plate and a cold rolling facility on the same line to make them continuous is described in, for example, Japanese Utility Model Publication No. 53-86443 and Japanese Utility Model Publication No. 2-16201. As is known. FIG. 14 is a pickling rewinder 1, a pickling tank inlet shear 2, a pickling welding machine 3, a pickling tank inlet looper 4, a pickling tank 5, a pickling tank outlet looper 6, a side trimmer 7, Pickling facility 14 including pickling tank outlet shear 8 and pickling winder 9, cold rolling facility rewinder 10, cold rolling mill 11, cold rolling facility outlet shear 12, cold rolling This is an example in which a cold rolling equipment 15 including equipment winding machines 13a and 13b is directly connected. FIG. 15 shows a conventional pickling equipment 1
4 is an example in which the cold rolling equipment looper 16, the cold rolling equipment 11, the cold rolling equipment delivery shear 12 and the cold rolling equipment winder 13 are directly connected to each other. In each of the above techniques, the moving speed of the strip-shaped metal plate in the pickling tank during the combined operation in which pickling and cold rolling are continuously operated is as shown in FIG.
As shown in the control block diagram in Fig. 2, the speed of the cold rolling equipment looper determined by the cold rolling equipment speed setting is determined by the speed of the cold rolling equipment looper correction and pickling tank exit looper correction. It In addition, the cold rolling equipment entrance speed is
It is determined by the speed of the cold rolling equipment looper corrected by the cold rolling equipment speed reference. Conventional pickling-cold rolling equipment is configured as described above, connecting the strip metal plate,
By continuously operating pickling and cold rolling, it is possible to eliminate the crop generated for each coil. And each facility can operate independently or simultaneously.

[0003]

The conventional pickling and cold rolling equipment as described above are installed in the same line so that pickling and cold rolling can be continuously operated. It is possible to make pickled products and cold-rolled products separately by switching between single pickling operation and pickling-cold rolling combined operation, but when pickling single operation, cold rolling operation becomes batch operation. . That is, in the case of producing only pickled products, it is sufficient to stop the cold rolling equipment and wind the strip-shaped metal plate after pickling with a pickling winder, so that no problem occurs. However, when cold-rolled products are manufactured at the same time, each strip-shaped metal plate bites into the cold-rolling mill and slips out, which results in (1) a shorter roll life. (2) The plate thickness in the vicinity of the front end and the rear end of the strip-shaped metal plate does not become the target plate thickness (hereinafter referred to as off gauge). (3) Problems such as low availability occur. Further, during the combined pickling-cold rolling operation, the cold rolling mill must be stopped when the width is changed in the side trimmer, and an off gauge is generated in the cold rolling mill. Further, in the equipment shown in FIG. 15, the cold rolling operation must be stopped when the pickling is operated alone. There is a problem. Further, as described above, the moving speed of the strip-shaped metal sheet in the pickling tank during the combined operation of continuously operating pickling and cold rolling is determined by the cold rolling equipment speed setting as shown in FIG. Since the speed of the cold rolling equipment looper is corrected and the pickling tank exit side looper is corrected based on the speed standard of the cold rolling equipment, the speed of the pickling side is defined by the cold rolling equipment speed setting. Therefore, when changing the speed of the pickling tank section or the side trimmer section, the speed of the cold rolling mill has to be changed. Further, when the cold rolling equipment is stopped by changing the rolls of the cold rolling mill or the like, the pickling is stopped, and as is clear from FIG. 13 which shows the degree of danger associated with the steel strip stop time in the pickling tank, Overpickling and discoloration occurred in pickling, and there were cases where plate breakage occurred when cold rolling these quality defect points.

The present invention was made in order to solve the above problems, and it is possible to simultaneously perform a single pickling operation and a combined operation of cold rolling equipment, and at the same time, perform a combined pickling and cold rolling operation. The purpose is to obtain a pickling-cold rolling facility.

[0005]

The pickling-cold rolling equipment according to the present invention is a pickling equipment in which the pickling equipment and the cold rolling equipment are directly connected-
In cold rolling equipment, between pickling tank and cold rolling mill, pickling tank exit side looper, side trimmer, pickling tank exit side shear, pickling tank exit side winder, cold rolling equipment rewinding Machine, a welding machine for cold rolling equipment, and a cold rolling equipment looper.

[0006]

In the present invention, when a steel strip is manufactured as a pickled product, the pickling is carried out independently, and when pickling is carried out in a separate line such as stainless steel, or when cold rolling is carried out alone. Can operate continuously even if the cold rolling equipment is operated independently, so the degree of freedom of operation is increased, it is easy to deal with special products with equipment failure, equipment repair, equipment process restriction, The number of occurrences of tail slipping is limited only at the start and end of the operation, and the occurrence of roll flaws, off-gauges, etc. is reduced, and the operation rate is improved. Even if the cold rolling equipment entrance side is stopped due to the trimmer width during continuous operation of pickling-cold rolling, it is not necessary to immediately stop the pickling tank, so discoloration in the pickling tank, peracid Washing does not occur, so the plate thickness fluctuation (off gauge) in the cold rolling mill,
Plate breakage is reduced. Similarly, in the cold rolling mill, fluctuations in plate thickness due to speed fluctuations and occurrence of roll flaws are reduced. The pickling tank is composed of a pickling tank, a washing tank of water or hot water spray and / or a washing tank of hot water tank. When the equipment is stopped or low temperature operation occurs in this part, the metal plate is overpickled and discolored.

[0007]

【Example】

Example 1. FIG. 1 is a layout of pickling-cold rolling equipment according to an embodiment of the present invention. 1 is a pickling rewinding machine, 2 is a pickling tank entrance side shear, 3 is a pickling tank entrance side welding machine, and a flash butt welding machine is adopted. Reference numeral 4 is a pickling tank entry side looper, and 5 is a pickling tank. 6a and 6b are pickling tank exit side loopers, which can reduce the load on the trimmer knife in the side trimmer,
The trim ear is a free loop type with good quality, and the steel strip stops and discolors in the pickling tank due to trouble on the pickling tank entry side or troubles on the pickling tank exit side such as the side trimmer.
Other types such as a loop car type may be adopted as they reduce the excessive pickling. Numeral 7 is a side trimmer, which aligns the width of the coil, changes the width, and removes the defective part of the ear. By using it as the outlet side of the pickling loop, the abrasion of the trimmer knife due to the surface scale is reduced and the processing speed is stabilized. The burden on the trimmer knife is constant. If the side trimmer 7 is connected to the pickling tank 5, the steel strip will stop in the pickling tank each time the plate thickness is changed, the lap margin is adjusted, the gap is changed when the plate thickness is changed, or the width is changed. Therefore, the quality is deteriorated. 8 is a shear on the outlet side of the pickling tank, and in the case of pickling alone or cold rolling, respectively,
This is for dividing the pickling to adjust the coil unit weight, collecting material test pieces or removing connecting parts of different widths, and removing defective parts that pass through pickling and can be detected after pickling. 9 is a pickling-side winder.

Pickling equipment line 14 comprising the above equipment
Following, cold rolling equipment 15 consisting of the following equipment
Are lined up. 10 is a cold rolling equipment rewinding machine, which is used for cold rolling alone or for pickling and coil supply at the time of each independent operation. Each independent operation is a constraint on the process quality capability of each of pickling and cold rolling. Therefore, when continuous operation is not possible, or one of them is a major problem, it is possible to prevent line suspension during regular reassembling such as roll change. Numeral 17 is a cold rolling equipment welding machine, which is a MIG, TIG, or laser welding machine for special metals, for connecting special metals and steel, and for continuous production of special materials only for cold rolling. A butt welder may also be used, in which case an in-machine shear, an in-machine side trimmer, and a shear on the inlet side are required, and welding of special materials is not possible. When the cold rolling equipment welding machine 17 is a laser welding machine, the points welded by the flash butt welding machine on the inlet side of the pickling tank and the singular points detected by the industrial monitor TV are directly cold rolled. In some cases, shear cutting and re-welding can be performed when the operator judges that the pipe will break. 16 is a cold rolling equipment looper, 11 is a cold rolling mill,
Reference numeral 12 is a shear on the outgoing side of the cold rolling equipment, and 13 is a winder for the cold rolling equipment. In the pickling equipment and the cold rolling equipment, the course of the steel strip 19 is changed by the helical turners 18a, 18b, 18c for the convenience of layout. As shown in FIGS. 2 and 3, the helical turner 18a includes a conversion roll 21 and an auxiliary roll 22 or 22 arranged side by side.
The steel strip 19 is fed around the outside of each roll consisting of a and 22b so that the front and back sides of the steel strip 19 are aligned. The side trimmer 7 is shown in FIG.
As shown in, the steel strip 19 has the delivery shift guide 3
0, the clipper 31, the trimmer front shift guide 32, and the plate retainer 33 are guided in the aligned state.

The operation method and control method in the pickling-cold rolling combined operation are as follows. FIG. 5 shows a particularly preferable control block during combined pickling and cold operation. That is, the speed of the pickling tank unit, the cold rolling equipment speed standard determined by the cold rolling equipment speed setting determined by the cold rolling equipment speed setting of the cold rolling equipment looper determined by the cold rolling equipment speed setting It is determined by the smaller speed of the corrected speed and the pickling tank speed setting. In addition, the cold rolling facility entrance side speed is set to the smaller speed of the speed set in the cold rolling facility looper based on the cold rolling facility speed reference and the pickling tank speed setting, whichever is smaller. Is determined by the speed at which the correction is applied. When the speed on the outlet side of the pickling tank is decreased by changing the width of the trimmer knife, the pickling tank part speed and the cold rolling mill speed are constant, so the picker tank exit side looper 6 is stored. Cold rolling equipment looper 1
6 is a payout operation. According to this control block,
In order to control the looper recovery from this state, first, the pickling tank speed is set to the pickling tank speed, the cold rolling equipment inlet speed is set to the pickling tank speed setting, and the pickling tank exit looper is corrected. It will follow the applied speed, but if the cold rolling equipment looper synchronizes, it will switch to the cold rolling equipment speed standard. During continuous operation of pickling-cold rolling equipment, the picker tank exit looper is controlled so that it is returned to the cold rolling equipment entrance side to stabilize the pickling tank speed and discolor the pickling tank.・ Since per-pickling is reduced, strip breakage and gauge fluctuation in the cold rolling mill are reduced.

FIG. 6 shows the equipment related to the pickling tank outlet side winder 9 and the cold rolling equipment rewinder 10. 40 is a bending roll, 42 is a gate table, 43 is a telescopic guide, 4
4 is a pinch roll, 45 is a leveler, 46 and 49 are inspection equipment, 47 is a notch puncher, 48 is a bead grinder, and 50 is a bridle roll, and they are the operations during single pickling and cold rolling operations or in a combined operation. As described below, the steel strip can be directly connected / cut between the pickling-side winder and the cold rolling facility-side rewinder. FIG. 7 and FIG. 8 show the case of shifting from the independent operation to the combined operation, in which the cold rolling facility rewinder 10 is emptied from the individual operation state (a), and the steel strip 19 is removed by the shear 8 on the pickling side. To be in the state of (b). Next table 42
Steel strip 19 from the pickling equipment side to the cold rolling equipment side
From the state of feeding (c) to (d), the steel strip 19 is abutted against the stopper of the cold rolling equipment welding machine 17, and then the steel strip 19 is continuous by a series of welding operations following the butt welding (e). )
~ (G) shifts to the combined operation. 9 and 10 show a case of shifting from the combined operation to the independent operation. From the combined operation state (a), the leveler 45 is pressed down and the steel strip 19 is sheared by the shear 8 on the delivery side of the cold rolling equipment (b). ) State. Next, the table 42 is tilted to wind the steel strip 19 on the pickling equipment side to the pickling tank exit side winding machine 9 and the tip of the expansion / contraction guide 43 is engaged with the cold rolling equipment rewinding machine 10 (c). From the state of (d), on the cold rolling equipment side, after the steel strip 19 has passed to a predetermined position, the cold rolling equipment 10 is installed in the cold rolling equipment rewinding machine 10 for cold rolling. After being sent to the welding machine 17 and abutting the steel strip 19 against the stopper, the steel strip 19 is continued in a series of welding operations following the butt welding, and the steel strips 19 are individually operated, shifting to states (e) to (g). . FIG. 11 and FIG. 12 show shear cutting / rewelding operations in the case of performing rewelding when it is judged by the operator that the connection portion of the steel strip 19 will be broken when cold rolled as it is. The steel strip 19 is stopped, and the re-welded portion of the steel strip 19 is cut by a shear in the cold rolling facility welding machine 17. Next, the steel strip 19 on the pickling side is inchingly fed and abutted against the stopper, and after a desired state, the steel strip 19 is continuous in a series of welding operations following butt welding (e) to (g). Restart complex operations.

[0011]

As described above, according to the present invention, since the independent operation of the cold rolling equipment can be continuously operated, the efficiency can be improved and the degree of freedom of operation can be increased. Since the independent operation rate of the cold rolling facility is dramatically improved from 73% to 85.5%, the number of occurrences of the phenomenon as shown in FIG. 13 can be reduced,
The roll life of the cold rolling mill was extended from 0.371kg / ton to 0.289kg / ton in terms of roll weight per strip rolling amount.
Further, as shown in Table 1, the generation of off-gauge becomes equivalent to that in the pickling-cold rolling combined operation, and it has an excellent effect such that the occurrence of plate breakage during cold rolling is reduced.

[0012]

[Table 1]

[Brief description of drawings]

FIG. 1 is a layout view showing a pickling-cold rolling facility according to an embodiment of the present invention.

FIG. 2 is a schematic view showing an example of a helical turner of a pickling-cold rolling facility according to an embodiment of the present invention.

FIG. 3 is a schematic view showing another example of the helical turner of the pickling-cold rolling equipment according to the embodiment of the present invention.

FIG. 4 is a schematic diagram showing a side trimmer and peripheral equipment of a pickling-cold rolling facility according to an embodiment of the present invention.

FIG. 5 is a block diagram showing a control mode of a pickling and cold rolling facility according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a pickling tank exit side winding machine of a pickling-cold rolling equipment, a cold rolling equipment rewinding machine, and related equipment according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram of an operation form of a pickling-cold rolling facility according to an embodiment of the present invention.

FIG. 8 is an explanatory diagram of an operating mode of the pickling-cold rolling facility according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram of an operating mode of the pickling-cold rolling facility according to the embodiment of the present invention.

FIG. 10 is an explanatory diagram of an operating form of a pickling-cold rolling facility according to an example of the present invention.

FIG. 11 is an explanatory diagram of an operating form of a pickling-cold rolling facility according to an example of the present invention.

FIG. 12 is an explanatory diagram of an operating mode of the pickling-cold rolling facility according to an example of the present invention.

FIG. 13 is an explanatory diagram of an operating form of the pickling-cold rolling facility according to the subject of the present invention.

FIG. 14 is an explanatory diagram showing an example of conventional equipment.

FIG. 15 is an explanatory view showing another embodiment of the conventional equipment.

FIG. 16 is a block diagram showing a control mode of conventional equipment.

[Explanation of symbols]

 1 Pickling rewinder 2 Pickling tank inlet shear 3 Pickling tank inlet welding machine 4 Pickling tank inlet looper 5 Pickling tank 6a, 6b Pickling tank outlet looper 7 Side trimmer 8 Pickling tank outlet Shear 9 Pickling side winding machine 10 Cold rolling equipment rewinding machine 11 Cold rolling machine 12 Cold rolling equipment delivery side Shear 13 Cold rolling equipment winding machine 14 Pickling equipment row 15 Cold rolling equipment 16 Cold Rolling equipment Looper 17 Cold rolling equipment Welder 18a, 18b, 18c Helical turner 19 Steel strip

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Hajime Tanaka, 1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Steel Tube Co., Ltd. (72) Inventor, Hisaaki Kataoka 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Main Steel Pipe Co., Ltd.

Claims (1)

[Claims] 1. In a pickling-cold rolling facility in which a pickling facility and a cold rolling facility are directly connected, between a pickling tank and a cold rolling mill,
Pickling tank exit side looper, side trimmer, pickling tank exit side shear, pickling tank exit side winder, cold rolling equipment rewinder, cold rolling equipment welding machine, cold rolling equipment looper The pickling-cold rolling facility, which is provided in the.