KR20010047171A - Reversing cold rolling apparatus - Google Patents

Abstract

PURPOSE: A cool milling equipment is provided to integrate a coil preparing line and a reverse typed milling line without falling the efficiency of a cool milling operation. CONSTITUTION: A cool milling equipment contains an uncoiling unit(1); a welder(5) arranged under the uncoiling unit and to weld steel strips or the steel strip with a dummy material; a first steel strip coiling-uncoiling unit(20) arranged under the welder; a reverse typed mill(13) arranged under the first steel strip coiling-uncoiling unit and to cold-mill the steel strip; a second steel strip coiling-uncoiling unit(11) and a third steel strip coiling-uncoiling unit(12) arranged on and under the reverse mill; and an exchanging device to exchange the positions of the first steel strip coiling-uncoiling unit and the second steel strip coiling-uncoiling unit by interlocking each other. Thereby, a preparing time of a milling line is not increased.

Description

Reversible Cold Rolling Mill {REVERSING COLD ROLLING APPARATUS}

The present invention relates to a reversible cold rolling facility for producing stainless steel sheet, silicon steel sheet and the like using a reversible rolling mill.

In the case of cold rolling high strain resistance materials such as stainless steel and silicon steel, reverse rolling is generally performed using a reversible small diameter rolling mill such as a Zenzimir mill. That is, as illustrated in FIG. 1B, the coil strip 14 to be rolled is wound several times to several times in a pair of coiling-uncoiling units 11 and 12. The strip steel 14 is repeatedly rolled to shape to a predetermined thickness while executing.

However, at the time of the rewinding, it is necessary to always hold the longitudinal end (end) of the band steel 14 around the mandrel of each of the winding rewinding devices 11 and 12 in a state of being wound several times so as to secure tension. The part which has not been rolled to the last as it exists exists, and this part and a part of strip | belt steel 14 of the length equivalent to just below a work roll from a winding rewinder become a bad part called a unrolled part.

Therefore, in order to minimize the length of this defective part, as a preparatory process of rolling work conventionally, the dummy material called a leader material is welded to the both ends of a strip steel, respectively, or the weld ends of the strip steels directly or via a dummy material are welded together. The coil preparation line which lengthens a strip | belt steel is provided separately, and the said defective part is made small and the improvement of a yield is aimed at.

Moreover, a coil preparation line often has a side trimmer which cut | disconnects an ear | edge part in order to remove the defect which exists in the width direction edge part (ear | edge part) of a strip | belt steel, or to adjust strip width dimension.

Here, if the structural example of the said coil preparation line and a rolling line is demonstrated, the coil preparation line is a recoiling unit 1 for rewinding the strip | belt steel 10 from an upstream side, as shown in FIG. 1A, and rewinding. Is a rough leveler 2 for correcting the winding bend of the band steel 10, a shear 3 for cutting the end of the band steel 10 for welding, and a dummy not shown. a dummy material supply device 4 for supplying strips, a welder 5 for welding the ends of the strip steel 10 or the ends of the strip steel 10 and the ends of the dummy material, a grinder 6 for grinding and smoothing the weld portion, Side trimmer 7 for cutting the ears of the band steel 10, a masher roll 8 for correcting a burr of the cut surface caused by cutting to the side trimmer, and a band steel ( The winding device 9 for winding 10) is comprised by being arranged in series.

Reference numeral 30 denotes a deflector pinch roll.

Here, although the shearing machine 3, the dummy material supply device 4, the welding machine 5, and the grinding machine 6 constitute a joining apparatus according to the present invention, the grinding machine 6 is not an essential component. In addition, the side trimmer 7 and the masher roll 8 are also not essential components.

Moreover, a rolling line is comprised from the winding rewinding apparatus 11 of the inlet side, the rolling mill 13, and the winding rewinding apparatus 12 of the exit side, as shown to FIG. 1B. do. Reference numeral 15 denotes a deflector roll.

However, since the coil preparation line and the cold rolling line are each independent lines, there are problems such as the following?

That is, a full-time worker of each of the coil preparation line and the reversible cold rolling line is required.

(2) The strip steel having completed the work on the coil preparation line is once wound up by the winding machine disposed on the outlet side of the coil preparation line, taken out from the line, and temporarily placed in the coil mounting place. Thereafter, a handling operation is required in which one coil, which is waiting at the coil mounting place, is set in the winding rewinder of the cold rolling line and transported into the rolling line.

Moreover, in order to shorten a line stop time (preparation time), in the cold rolling line provided with a conveyer separately in the line entrance side, the coil temporarily mounted in the coil mounting place is set to this conveyer.

③ Since both lines of the coil preparation line and the reversible cold rolling line are independent, useless cycles of winding and conveying are repeated, so that when the rolling of the preceding band steel is completed, the next coil can be immediately passed through the rolling line. It is also necessary to process several coil in advance by the coil preparation line, and to make it wait in a predetermined place.

(4) In addition, there is a fear that the steel strip may be damaged during the handling.

In order to solve the above problems, it is conceivable to form a single line in which the coil preparation line and the cold rolling line are simply continuous, that is, the band steels or the band steels and the dummy material are welded, and then the cold rolling is continued. However, there are the following problems.

(5) Since it is necessary to stop the band steel during the welding work, the rolling work must also be stopped, resulting in a decrease in the productivity of the rolling work.

(6) Since the distance from the rewinder to the work roll becomes longer, and the length of the dummy material has to be lengthened by that amount, the dummy material supply device becomes large and the cost increases as the dummy material length increases.

(7) It is also possible to arrange a plurality of rolling mills in series and change from reverse rolling to one-way rolling, but equipment cost is high.

For this reason, for the reason of (1)-(7), it is the present situation that the installation which used the coil preparation line and the reversible cold rolling line as a single line conventionally is not constructed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and aims to solve the above problems by integrating the coil preparation line and the cold rolling line without degrading the efficiency of the rolling operation.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, this invention is arrange | positioned downstream of the strip | belt-steel rewinder, the said strip | belt-steel rewinder, bonding device which bonds strip | belt steels together, or bonds strip | belt steel and a dummy material, and arrange | positioned downstream of the said bonding device. A first band steel winding rewinder, a reversible rolling mill disposed downstream of the first band steel winding rewinder, and cold rolling the band steel, and a second band steel winding respectively disposed upstream and downstream of the reversible rolling mill. A rewinder and a third strip rewinder are provided, and at the same time, the first strip rewinder and the second strip rewinder are interlocked with each other to move the first strip reel and the second strip reel. It is to provide a cold rolling facility characterized by having a replacement means for replacing the position of.

According to the present invention, during the cold rolling operation on the preceding strip steel, the bonding of the dummy material to the end of the subsequent strip steel is performed independently of the cold rolling operation, that is, without stopping the rolling mill, and thus rewinding the first winding. Is wound on the device.

Then, when the current cold rolling operation is completed and wound up in the third winding rewinding device, by operating the replacement means, the first winding rewinding device becomes the second winding rewinding device, and the second winding rewinding device becomes the first winding rewinding device. Replaced. This simplifies the conventionally performed handling operation for the trailing strip steel.

That is, by employ | adopting the cold rolling facility of this invention, there exists an effect that a coil preparation line and a reversible rolling line can be integrated, without reducing the efficiency of a cold rolling operation.

1A and 1B are diagrams showing examples of configurations of a conventional coil preparation line and a reversible rolling line, in which FIG. 1A shows a coil preparation line, and FIG. 1B shows a reversible rolling line, respectively;

Figure 2 is a view for explaining the reversible cold rolling equipment according to an embodiment of the present invention, a view showing a state in which the dummy material welded to the trailing strip steel end,

3 is a view for explaining a cold rolling facility according to an embodiment of the present invention, showing a state in which a dummy material is welded to a trailing strip steel end;

4A and 4B are views illustrating the replacement of the first winding rewinder and the second winding rewinder, in which FIG. 4A is a state in which the rolling of the preceding band steel is completed, and FIG. 4B is a replacement of the winding rewinder to roll the trailing strip steel. Respectively showing a state in which

5 is a view for explaining a replacement means of another winding rewinding device.

Description of the main parts of the drawing

1: rewinder 5: welding machine

7: side trimmer 8: masher roll

10, 14: steel strip 11: second winding rewinder

12: 3rd winding rewinder 13: rolling mill

20: first rewinder 21: frame

23: pile material CP: coil preparation section

CRM: rolling section

Next, embodiments of the invention will be described with reference to the drawings. In addition, about the apparatus similar to the said prior art example (FIG. 1), the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

2 shows a cold rolling facility according to an embodiment of the present invention.

The basic configuration of the coil preparation section (CP) and the rolling section (CRM: Cold Reverse Mill) are the same as in the related art, but the winding device 9 on the outlet side of the coil preparation line and the rolling line inlet side of the coil preparation line in the related art are conventional. The second winding rewinder 11 is connected to constitute a so-called carousel winding rewinder having two winding rewinders 20 and 11, thereby producing a coil preparation section CP and rolling. Sections (CRM) are connected.

In other words, the first winding rewinding device 20 and the first winding rewinding device 20 and the winding rewinding device 11 (hereinafter, The second winding rewinder) is supported on the same frame 21.

The frame 21 has a rotating shaft 22 disposed at the midpoint of a line segment connecting both mandrels of the first winding rewinder 20 and the second winding rewinder 11, and the frame 21 is illustrated. An actuator (hydraulic motor, hydraulic cylinder device, etc.) that is not rotated is rotated about the rotation shaft 22, and the position of the first winding rewinder 20 and the second winding are rotated by rotating the frame 21 by 180 degrees. The position of the rewinder 11 is smoothly replaced.

Here, the replacement means is constituted by the frame 21 and an actuator not shown.

Here, in order to enable the welding of the dummy material 23 to the tip of the trailing band steel 10 during the rolling of the preceding band steel 14, the welder 5 is considered in consideration of the maximum length of the dummy material 23. And the relative dimensions of the positions of the first and second winding rewinders 20, 11 are determined.

In addition, as shown in FIG. 2, the coil preparation section CP of the present embodiment has an edge grinding machine 8 in place of the side trimmer 7 and the masher roll upstream of the welding machine 5, unlike the conventional example. ') Is arranged, but as in the conventional example, the side trimmer 7 and the masher roll 8 (which may be the edge grinding machine 8') may be disposed downstream of the welding machine 5. That is, the structure of the coil preparation line other than the winding-up apparatus 9 by the exit side in the past may be any other structure. Next, the effect | action of the cold rolling facility of the said structure is demonstrated.

In the rolling section CRM, the preceding strip steel 14 is repeatedly wound and rewound in the second winding rewinding device 11 and the third winding rewinding device 12 to thereby roll the preceding strip steel 14 into a rolling mill. During reverse rolling in (13), the reinforcing strip 1 is wound by the rewinder 1 independently of the rolling operation in the same manner as in the related art, and the dummy material 23 at the tip end by the welding machine 5. ), (Refer FIG. 2), it winds up to the 1st winding rewinding apparatus 20 sequentially, and also welds the dummy material 23 to the rear end of the strip steel 10 (refer FIG. 3), and 1st winding The coil preparation process of winding up the rewinder 20 and welding the dummy material 23 to the end of the strip steel 10 is completed.

In this way, despite connecting the coil preparation section CP and the rolling section CRM, the rolling mill is used to weld the dummy material 23 without degrading the efficiency of rolling the preceding band steel 14. The welding joining operation | work of the dummy material 23 to the front end part and the rear end part of the following strip | belt steel 10 can be performed, without stopping.

In addition, when the rolling operation is completed with respect to the preceding band steel 14 and is wound up in the third winding rewinder 12, as shown in FIG. 4, the frame 21 is rotated 180 degrees and the second winding rewinder ( 11) is replaced with the first winding rewinder and the first winding rewinder 20 is replaced with the second winding rewinder.

Subsequently, the new strip steel 14 is rewound from the first winding rewinding device 20 to pass through the rolling mill 13 and to the third winding rewinding device 12 to start a new rolling operation.

In this way, the preparation time, that is, the line stop time, which is an important factor that influences the efficiency of the rolling work, can be set at a level substantially equivalent to that of the conventional case provided by the rolling line alone.

That is, in the case where the coil preparation section CP and the rolling section CRM are simply connected, an extra line before the end of one pass of the preceding band steel in order to join the dummy material to the rear end of the preceding band steel during rolling. Downtime occurs. On the other hand, by using the rotating frame as in the present invention, the extra line stop time does not occur by joining the dummy material to the rear end of the trailing band steel during the rolling of the preceding band steel. Further, even if only the frame 21 is rotated, the trailing strip steel 10 in which the dummy material 23 is welded and joined in the coil preparation section CP is inserted into the rolling section CRM, so that the coil preparation section CP is inserted. The operation of transitioning the strip steel 10 to the rolling section (CRM) from < RTI ID = 0.0 > (CRM) < / RTI > is carried out simply and smoothly, while the coil is once removed from the mandrel of the take-up rewinder 20 and set in a separate device or in a standby area (coil Since it is not necessary to make it stand by once in a mounting place, the possibility that a flaw may arise in the strip | belt steel when moving a strip | belt steel from a coil preparation section CP to a rolling section CRM is greatly reduced.

In the coil preparation section CP, trimming is performed by installing a side trimmer for cutting the ear and a masher roll for correcting the rough portion of the cut surface caused by the cutting with the side trimmer, or a grinding machine for grinding and smoothing the weld. Scratches are prevented from occurring in the work roll of the rolling mill 13 by the bead of the roughened portion or the welded portion of the end portion. As a result, even if the coil preparation section CP and the rolling section CRM are unified, cold rolling can be performed favorably.

Here, although the said description (FIG. 3) demonstrated the case where the dummy material 23 is weld-joined to the edge part of the trailing strip steel 10 in the coil preparation section CP, the edges of the strip steel 10 are demonstrated. It may be a case where a coil preparation process is performed in which the band steel 10 is lengthened by welding by directly or through the dummy material 23.

In addition, the replacement means which replaces the 1st winding rewinding apparatus 20 and the 2nd winding rewinding apparatus 11 is a case where both winding rewinding apparatuses 11 and 20 support the same frame 21 as mentioned above. It is not limited. Any mechanism may be used as long as it is a mechanism capable of interlocking and replacing the positions of the two winding rewinders 11 and 20.

For example, the frame which supports the 1st winding rewinding apparatus 20 and the 2nd winding rewinding apparatus 11 is set as separate frame 21A, 21B, respectively, as shown in FIG. By the actuator, both frames 21A and 21B are moved along the arrows shown in FIG. 5 or both frames (1) are replaced so that both positions of the first winding rewinder 20 and the second winding rewinder 11 are interchanged with each other. It is also possible to employ a mechanism such as pivoting in conjunction with 21A and 21B).

In addition, about the first band steel of an operation start, you may pass directly to the rolling mill 13 side and wind it around the 3rd winding rewinding apparatus 12, without using the 1st and 2nd winding rewinding apparatus 20,11. .

Moreover, in the said Example, although the case where the rolling pass was even was demonstrated, it is a matter of course that it may be an odd pass. In this case, the coiled steel strip prepared by coiling is rolled by the rolling mill 13 while being reciprocally conveyed between the 2nd winding rewinding apparatus 11 and the 3rd winding rewinding apparatus 12, and after completion of rolling, the 2nd winding rewinding apparatus ( 11) is wound up.

As explained above, by employing the cold rolling facility of the present invention, there is an effect that the coil preparation line and the reversible rolling line can be integrated without reducing the efficiency of the cold rolling operation.

Moreover, the following effects also arise by integrating a coil preparation line and a reversible rolling line.

(1) The preparation time of the rolling line does not increase even if the carrier in the rolling line is omitted. That is, a conveyer can be omitted without reducing efficiency, and construction cost can be reduced.

② The number of workers can be reduced by integrating both lines of the coil preparation line and the reversible rolling line.

(3) The coil processed by the coil preparation line does not need to wait in multiple numbers for rolling.

(4) Since the transition of the coil from the coil preparation line to the rolling line is carried out loaded in the mandrel of the same winding rewinder, the probability of a flaw in the coil during the transition is greatly reduced.

Moreover, when employ | adopting invention of Claim 2, there exists an effect that a transition operation of a coil from a coil preparation section to a rolling section will be simplified.

Moreover, if the invention of Claim 4 or 5 is employ | adopted, even if it integrates a coil preparation line and a rolling line, there exists an effect that a rolling operation can be performed favorably without a flaw generate | occur | producing in the work roll of a rolling mill.

Claims (7)

With an uncoiling unit, A joining device disposed downstream of the strip rewinding device, the joining device for joining strip steels together or joining strip steels and dummy materials; A first strip coiling-uncoiling unit disposed downstream of the bonding apparatus; A reversible rolling mill disposed downstream of the first strip steel winding rewinder and cold rolling the strip steel; At the same time as having a second band steel winding rewinding device and a third band steel winding rewinding device disposed respectively upstream and downstream of the reversible rolling mill, Cold rolling, characterized in that it has a replacement means for moving the first belt reel winding device and the second belt reel winding device in association with each other, thereby replacing the positions of the first belt reel winding device and the second belt reel winding device. equipment. The method of claim 1, The replacement means, A cold rolling facility characterized by supporting the first strip reel winding device and the second strip reel winding device on the same frame so that the frame can be rotated or moved. The method of claim 1, The bonding device, A cold rolling facility characterized by joining the rear end of the preceding band steel and the trailing end of the trailing band steel, which are rewound by the rewinder, directly or via a dummy material, or joining the dummy material to the front end and the rear end of the band steel. The method of claim 1, The bonding device, And a shear for cutting an end portion of the strip steel, and a dummy material supply device for supplying a dummy material. The method of claim 4, wherein The bonding device, The grinding apparatus further comprises the grinding apparatus which grinds a junction part. The method of claim 4, wherein The bonding device, And a side trimmer for cutting the ear and / or a mesher roll for correcting the rough portion of the cut surface. The method of claim 6, The bonding device, Cold rolling equipment further comprises an edge grinding machine.