JPS63104715A - Method and device for by-passing of metal strip continuously passing through line - Google Patents

Abstract

PURPOSE:To simply and surely transfer a metal strip to a by-path by cutting the strip passing in a line at the inlet and outlet sides of a specific treatment device and welding to connect ends of the strip to the front and rear ends of a dummy metal strip previously prepared in the by-path line. CONSTITUTION:In the case that a metal strip 1 being carried in a line consisting of many treatment devices is by-passed a specific treatment device including an annealing furnace 6 provided with a cooling device 7, the strip 1 is cut at the inlet and outlet sides of the furnace 6 by shearing machines 4a, 4b. The cut strip 1 is left in the furnace 6 with the strip 1 having no tension and both ends of the strip 1 are moved up by holding and moving devices 14, 15. Then, both ends of a dummy metal strip 1a previously prepared in a by-path line consisting of a roll group 16 are moved up by holding and moving devices 12, 13. Then, both the ends of the dummy strip 1a and both the cut ends of the strip 1 in the line are welded and connected by welding machines 5a, 5b. Thus, the strip 1 is transferred in the by-path line and the residual metal strip in the furnace 6 is prevented from breaking.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to bypass threading and passing of a metal strip through a line consisting of a large number of metal strip processing devices, which does not allow the strip to pass through a specific processing device in the line. The present invention relates to a bypass method for a metal strip that continuously passes through a line that can be converted into two states of continuous threading, and a device for carrying out the method.

[Conventional technology]

Generally, a line consisting of a large number of metal strip processing devices is used as a processing line for gold GT strip.

For example, a metal strip such as a hot-rolled stainless steel strip is passed through a continuous annealing and pickling line that is equipped with an annealing device mainly consisting of an annealing furnace and a pickling device consisting of a pickling tank. It was being processed. That is, as shown in FIG. 6, the hot-rolled and wound coil 2 is mounted on the payoff reel 3 on the entry side. The metal strip 1 that is unwound from the coil 2 and passed through the line has its front end sheared by a shearer 4, and then the rear end of the preceding metal strip 1 whose rear end was sheared by the shearer 4. After welding with the welding machine 5, the sheet is passed through an annealing furnace 6 and then through a cooling device 7. Next, the scale adhering to the surface is removed in a pickling tank 8, and the front and rear ends are cut by a shearer 9 on the outlet side, and the tension reel 10 is
It was wound up one after another as a coil 11.

However, taking as an example the case where a stainless steel strip is processed by such a continuous annealing and pickling line, it is generally 5 US
Austenitic stainless steel strips represented by 304, martensitic and ferritic stainless steels such as 5US410 and 5US430, which are generally annealed in a batch-type bell-shaped annealing furnace after hot rolling. Naturally, in the case of steel strips, annealing in the annealing furnace 6 is not necessary in the continuous annealing and pickling line, so annealing in the annealing furnace 6 was stopped and only pickling was performed with the main purpose of removing scale. . In addition, if the metal strip to be treated on such a continuous annealing and pickling line is a titanium strip, the hot rolled titanium strip has a thick oxide film formed on its surface, so it is necessary to go through the continuous annealing and pickling line twice. It may be necessary to pass the board.

In that case, first annealing and pickling treatment is performed to anneal and remove the oxide film on the surface layer, and then the plate is passed through the continuous annealing and pickling line again to completely remove the oxide film on the surface. During the second pass, since annealing in an annealing furnace was not necessary, annealing in an annealing furnace was stopped and only pickling was performed with the main purpose of removing the oxide film.

[Problem that the invention seeks to solve]

As mentioned above, when a metal strip is continuously passed through a line consisting of a large number of metal strip processing devices and there is no need to pass it through a specific processing device in the line 1. For example, an austenitic stainless copper steel strip is used in a continuous annealing and pickling line. When changing the metal strip that has been annealed and pickled to a ferritic stainless steel strip that does not require continuous annealing, it is necessary to prevent the transformation of the ferritic stainless steel strip. In order to prevent oxidation on the strip surface, it is necessary to wait until the temperature inside the annealing furnace drops below a certain temperature or close to room temperature, which not only significantly reduces the operating efficiency of the line, but also reduces the temperature. The ferritic stainless steel strip passed through the annealing furnace at a lower temperature carries out the residual heat inside the annealing furnace, further lowering the temperature inside the annealing furnace.

On the other hand, even if an attempt is made to change the metal strip from a state where only continuous pickling treatment was performed on ferritic stainless steel strip to an austenitic stainless steel strip that requires continuous annealing and pickling treatment, the annealing furnace It takes a long time and a large amount of thermal energy to raise the temperature inside the line to a temperature at which annealing can be carried out, which has the problem of lowering the operating efficiency of the line and making it uneconomical. These problems also occur when a titanium strip is passed for the second time after the first pass, and when a new titanium strip is passed for the first time again after the first pass. This was a problem.

Among the problems that have arisen when metal strips that are continuously passed through a line consisting of a large number of metal strip processing devices do not need to be passed through a specific processing device in the line, there is a decrease in the operating efficiency of the line. Even if we try to prevent this problem, if the specific processing equipment is a furnace that maintains a high temperature state such as an annealing furnace, there is a risk of damage to the bricks that make up the inner wall of the furnace. It is impossible to raise the temperature rapidly.

In addition, in order to raise the temperature of a furnace that has cooled to room temperature to a processing temperature, for example, in the case of an annealing furnace, it takes 5
ooo 12 is also necessary, and in order to deal with this economical problem, there is a method of increasing the types of metal strips to be threaded as much as possible and threading only the same type of metal strips that undergo the same processing. However, grouping only metal strips of the same type in this way resulted in a serious problem in that the amount of work in progress would increase and would impede smooth production planning.

[Means for solving problems]

The inventors of the present invention have conducted intensive research to solve the conventional problems as described above, and have found that it is necessary for the metal strip to be passed through a specific processing device in the line to be passed through a line consisting of a large number of metal strip processing devices. In the case of a certain metal strip, it is passed through the line as before, but for metal strips where it is not desirable to pass the strip through a specific processing device, if the specific processing device is bypassed and passed through, the specific processing device is in a high temperature state like a furnace. In the case of processing equipment that is maintained at Focusing on the fact that one line can be used efficiently and for multiple purposes even when the processing equipment is not in use, in order to pass this bypass, we installed a bypass route for metal strips in which it is not desirable to pass through a specific processing equipment in advance. Prepare a dummy metal strip, and when changing to a metal strip that does not pass through a specific processing device, connect the metal strip that is allowed to pass through the specific processing device to the input and exit sides of the specific processing device. The front end of the dummy gold fijt strip and the rear end of the cut metal strip are welded together on the output side of the specific processing equipment, and the rear end of the dummy metal strip is welded on the input side of the specific processing equipment. By welding and joining the front end of a metal strip that does not allow the specified processing device to pass through, it is possible to pass the specified processing device by bypass. The front end of the metal strip that was left in the specific processing device after cutting the metal strip at the input and exit sides of the specific processing device, and the rear end of the cut metal strip At the same time, the rear end of the metal strip left in the specific processing device on the entry side of the specific processing device and the front end of the metal strip through which the specific processing device is passed are welded and connected for continuous passage. They completed the present invention by discovering that by installing a plate, it was possible to quickly shift to the bypass route.

In other words, the present invention provides two methods of passing metal strips through a line consisting of a large number of metal strip processing devices: bypass strip threading in which the metal strip does not pass through a specific processing device in the line, and continuous strip threading in which the strip passes through a specific processing device in the line. When converting to board state.

In the line through which the specific processing equipment is passed, a dummy metal strip is cut at the input and exit sides of the specific processing equipment and is prepared in advance on a bypass route where the specific processing equipment is not passed through. If you prepare a metal strip and change it to a metal strip that does not allow the sheet to pass through the specified processing device, the metal strip that is allowed to pass through the specified processing device should be prepared at the entrance and exit sides of the specified processing device. The front end of the dummy metal strip and the rear end of the cut metal strip are welded together on the exit side of the specific processing device, and the rear end of the dummy metal strip and the back end of the cut metal strip are welded together on the inlet side of the specific processing device. By welding and joining the front end of the metal strip that does not allow the specified processing device to pass through, it is possible to pass the specified processing device by bypass. The front end of the metal strip that was left in the specific processing device on the exit side of the specific processing device by cutting the metal strip at the entrance and exit sides of the specific processing device, and the rear end of the cut metal strip At the same time, the rear end of the metal strip left in the specific processing device on the entry side of the specific processing device and the front end of the metal strip through which the specific processing device is passed are welded and connected to create a continuous flow. The present invention provides a bypass method for a metal strip that is continuously passed through a line, characterized in that the metal strip is continuously passed through a line, and a bypass device for a metal strip that is continuously passed through a line for carrying out the method.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bypass method and apparatus for a metal strip that is continuously passed through a line according to the present invention will be described in detail below with reference to embodiments shown in the drawings in the case where the specific processing equipment is an annealing furnace.

FIG. 1 is a schematic explanatory diagram showing a state in which a metal strip is passed through a specific processing device consisting of an annealing furnace in the method of the present invention, and FIG. A schematic explanatory diagram showing a state in which the plates are attached, and FIGS. 3 to 5 are one embodiment of the apparatus of the present invention installed on the inlet and outlet sides of a specific processing apparatus for carrying out the method of the present invention. FIG. 3 is a side view illustrating the operation.

In the drawing, 4a is a shearing machine that is installed on the entry side of a specific processing device 6 (an annealing furnace in the illustrated embodiment) and cuts the metal strip 1 that is being passed through the line, and 5a is a shearing machine that changes the threading state. The front end of a new metal strip 1 whose front end has been cut by a shearer 4a to be processed, and the dummy metal strip 1a prepared in advance on the bypass path or the metal strip 1 left in the specific processing equipment 6. A welding machine 7 for welding and joining the rear end is a cooling device provided on the outlet side of the annealing furnace 6. In this way, the shearing machine 4a, the welding machine 5a, the annealing furnace 6, and the cooling device 7
It is no different from a conventional continuous line in that it is provided with.

The fundamental difference in the present invention from conventional lines is that a dummy gold IA prepared in advance in the bypass path
A pair of holding and moving devices 1 each capable of holding the band 1a on the entry side and the exit side of the specific processing bag M6 and moving it in the front and rear directions, and also moving it in the up and down direction with respect to the bypass path.
The holding devices 12a, 13a and pinch rolls 12b, 13b forming ovals 2 and 13 hold the metal strip 1 left in the specific processing device 6 at the entrance and exit sides of the specific processing device 6, respectively. Holding devices 14a and 1 constituting each pair of holding and moving devices 14 and 15 that can be moved in the front-back direction and vertically with respect to the pass line;
5a, pinch rolls 14b and 15b, a roll group 16 that is on the bypass path and supports and guides the dummy metal strip 1a, and a roll group 16 that is installed on the exit side of the specific processing device 6 and is passed through the line. Shearing machine 4 for cutting metal strip 1
b, and a dummy metal strip 1a or specific processing device f! prepared in advance at the rear end of the metal strip 1 cut by the shearing machine 4b and the bypass route. A welding machine 5b is installed to weld and join the front end of the metal strip 1 remaining in the metal strip 16.

[Effect]

The operation of carrying out the method of the present invention using the bypass device for a metal band that continuously passes through the line according to the present invention having such a structure will be described below.

When changing the metal strip 1 that passes through the specific processing device 6 to a metal strip 1 that does not allow the specific processing device 6 to pass through, the metal strip 1 that is passed through the specific processing device 6 should be changed to the exit side and the inlet side of the specific processing device 6. Then the metal strip 1 is cut as shown in FIG. 3 using shears 4a and 4b, and the front and rear ends of the metal strip 1 left in the specific processing device 6 that have been cut by the shears 4a and 4b are held and moved. The front end of the metal band 1 is moved backward and the rear end is moved forward while being held between the pinch rolls 14b and 15b that constitute the devices 14 and 15, respectively, and then the front end of the metal band 1 is moved by the holding devices 14a and 15a. and the rear ends are held and moved in the vertical direction on the side opposite to the side where the dummy metal band 1a exists with respect to the pass line in the line where the sheet is passed continuously,
Next, a holding device 112a constituting the holding and moving devices 12 and 13 holds the inlet side and the outlet side of the specific processing device 6 of the dummy metal band 1a prepared in advance on the bypass path.
and 13a, the holding device 12a is moved vertically with respect to the bypass path as shown in FIG.
Then, the state held by the dummy metal band 1a is released, and the front end of the dummy metal band 1a is moved forward and the rear end of the dummy metal band 1a is moved backward by the pinch rolls 12b and 13b, which are holding the dummy metal band 1a. On the exit side of the processing device 6, the front end of the dummy metal strip 1a and the rear end of the cut metal strip 1 are welded together using a welder 5b, and at the same time, on the entry side of the specific processing device 6, the rear end of the dummy metal strip 1a is welded together. and the front end of the metal strip 1, which is not allowed to pass through the specific processing device 6, are welded together using a welding machine 5a, and bypass passing is performed as shown in FIG.

Moreover, when changing to the metal strip 1 through which the specific processing device 6 passes, the operations from FIG. 3 to FIG. 5 described above may be performed in reverse. That is, the metal strip 1 which is bypass-passed through the specific processing device 6 is cut by the shears 4a and 4b on the exit side and the inlet side of the specific processing device 6.
The front and rear ends of the metal band cut at points a and 4b and left in the bypass path to form the dummy metal band 1a are pinched by pinch rolls 12b and 13b constituting the holding and moving devices 12 and 13. The front end of the metal band 1a is moved backward and the rear end is moved forward as shown in FIG. It is moved to the opposite side of the metal strip 1 that was left inside, and then the specific processing device 6 is removed.
The holding devices 14a and 15a which were holding the metal strip 1 left in the specific processing device 6 on the exit side and the inlet side of the l
After moving to the a side, that is, the pass line side for continuous sheet passing, the specific processing device 6 is used with pinch rolls 14b and 15b.
The front end of the metal strip 1 left inside the metal strip 1 was moved forward and the rear end was moved backward, and the metal strip 1 left inside the specific processing device 6 was cut with the front end of the gold [;FiFl] on the exit side of the specific processing device 6. The rear end of the metal strip 1 that has been removed is welded together using a welding machine 5b, and the rear end of the metal strip 1 left in the specific processing device 6 is passed through the specific processing device 6 on the entry side of the specific processing device 6. The front end of the metal strip 1 to be plated is welded and joined using a welding machine 5a, and the plate is continuously threaded as shown in FIG.

〔effect〕

The bypass method and device for a metal strip that is continuously passed through a line according to the present invention as described in detail above allows a metal strip that is continuously passed through a line consisting of a large number of metal strip processing devices to pass through a specific processing device in the line. It is possible to easily change to two threading conditions: a bypass threading state in which the sheet is not threaded, and a continuous threading state in which the threading is threaded.

Even if it is undesirable to pass a metal strip through that specific processing device, if it is bypass-passed on the same line, processing other than that by that specific processing device will be handled by other metal strip processing devices installed on that line. Since the processing can be carried out, the operating efficiency of the line can be increased, and even if it is not desirable to pass the metal strip through a specific processing device, it is possible to bypass it on the same line. The metal strip that was threaded before changing to the bypass threading state remains in the specific processing equipment, so when changing from the continuous threading state to the bypass threading state where the material passes through the specific processing equipment, Since there is no need to change the conditions within the specific processing equipment, such as by lowering the temperature or changing the liquid composition, there is almost no waiting time due to such changes, which significantly increases the operating efficiency of the line. In addition, as in the device of the present invention, the metal strips left inside the specific processing device can be held at the entrance and exit sides of the specific processing device, respectively. If a pair of holding and moving devices are provided that can be moved in the front-back direction and vertically relative to the pass line, the specific processing device will be in a state where tension is applied to the metal strip due to the high temperature, such as in an annealing furnace. Even in cases where there is a risk of the metal strip breaking if left as is for a long period of time, it is possible to change to bypass plate threading because the metal strip left in the specific processing equipment can be kept in a state where no tension is applied. It has various advantages such as not causing any problems, and its industrial value is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing a state in which a metal strip is passed through a specific processing device consisting of an annealing furnace in the method of the present invention, and FIG. A schematic explanatory diagram showing a state in which the plates are attached, and FIGS. 3 to 5 are one embodiment of the apparatus of the present invention installed on the inlet and outlet sides of a specific processing apparatus for carrying out the method of the present invention. FIG. 6 is a schematic explanatory diagram showing a conventional continuous annealing and pickling line. 1... Metal strip 1a... Dummy metal strip 2... Coil 3... Payoff reel 4... Shearing machine 4a... Shearing machine 4b... Front and rear side walls 5... Welding machine 5a... Welding machine 5b ... Welding machine 6 ... Specific processing equipment (annealing furnace) 7 ... Cooling device 8 ... Pickling tank 9 ... Shearing machine 10 ... Tension reel 11 ... Coil 12 ... Holding and moving device 12a ... Holding device 12b... Pinch roll 13... Holding and moving device 13a... Holding device 13b... Pinch roll 14... Holding and moving device 14a... Holding device 14b... Pinch roll 15... Holding and moving device 15a... Holding device 15b.・Pinch roll 16...Roll group 11'...
16Figure 3Figure 4

Claims (1)

[Scope of Claims] 1 Two types of threading: bypass threading in which the metal strip is passed through a line consisting of a large number of metal strip processing devices, in which the metal strip is not passed through a specific processing device in the line, and continuous threading in which the metal strip is passed through the line. When converting to the state, a metal strip is cut in the line through which the sheet passes through the specific processing device and a bypass path that is cut at the entrance and exit sides of the specific processing device and does not pass through the specific processing device. If you prepare a dummy metal strip and change it to a metal strip that does not pass through the specific processing device, replace the metal strip that is allowed to pass through the specific processing device. The front end of the dummy metal strip and the rear end of the cut metal strip are welded together on the exit side of the specific processing equipment, and the dummy metal strip is cut on the entry side and the exit side of the specific processing equipment. The rear end of the metal strip and the front end of the metal strip that does not pass through the specified processing device are welded together to pass the metal strip by bypass, and when changing to a metal band that allows the specified processing device to pass through, the specified processing device is The metal strip that is passed through the bypass plate is cut at the entrance and exit sides of the specific processing device, and the front end of the metal strip left in the specific processing device is cut at the exit side of the specific processing device. At the same time, the rear end of the metal strip left in the specific processing device on the entry side of the specific processing device and the front end of the metal strip that is passed through the specific processing device are welded together. A bypass method for a metal strip that continuously passes through a line, which is characterized by welding and joining and continuously passing the strip. 2. A bypass method for a metal strip that continuously passes through a line according to claim 1, wherein the line is a continuous annealing and pickling line. 3. A bypass method for a metal strip that is continuously passed through a line according to claim 2, wherein the specific processing device is an annealing furnace. 4. A bypass method for a metal strip that continuously passes through a line according to claim 2 or 3, wherein the metal strip is a stainless steel strip. 5. A bypass method for a metal band that continuously passes through a line according to claim 2 or 3, wherein the metal band is a titanium band. 6. Conversion of a metal strip passing through a line consisting of a large number of metal strip processing devices into two threading states: bypass threading, in which the strip does not pass through a specific processing device in the line, and continuous threading, in which the strip passes through a specific processing device in the line. A shearing machine that cuts the metal strip that is passed through the line and is installed on the inlet and outlet sides of the specific processing equipment, and is converted at the inlet side of the specific processing equipment. A welding machine that welds together the front end of the metal strip and the rear end of the dummy metal strip prepared in advance on the bypass route or the metal strip left in the specific processing equipment, and the rear end of the cut metal strip. and a dummy metal strip prepared in advance on the bypass route or a front end of the metal strip left in the specific processing device; a pair of holding and moving devices that can be held and moved in the front and back directions at the entrance and exit sides of the specific processing device, respectively, and that can be moved in the vertical direction with respect to the bypass path; a pair of holding and moving devices capable of holding and moving the metal strips in the front and back directions at the entrance and exit sides of the specific processing device, respectively, and moving the metal strips in the vertical direction with respect to the pass line; A bypass device for a metal strip that continuously passes through a line, comprising a group of rolls that support and guide a dummy metal strip. 7. A bypass device for a metal strip that continuously passes through a line according to claim 6, wherein the line is a continuous annealing and pickling line. 8. A bypass device for a metal strip that is continuously passed through a line according to claim 7, wherein the specific processing device is an annealing furnace. 9. A bypass device for a metal strip that continuously passes through a line according to claim 7 or 8, wherein the metal strip is a stainless steel strip. 10. A bypass device for a metal band that continuously passes through a line according to claim 7 or 8, wherein the metal band is a titanium band.