JPH0342101A - Rolling equipment, rolling method and rolling control method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to rolling equipment, a rolling method, and a rolling control method for manufacturing thin plate materials.

[Conventional technology]

In recent years, needs in the field of manufacturing thin sheet materials have been changing significantly from mass production to high-mix, low-volume production, and the demand for rolling ultra-thin materials, high-hardness materials, etc. is increasing. However, when rolling such materials, most of the base materials are already extremely thin or have high deformation resistance (high hardness materials), and even if you try to increase the rolling reduction, the rolling roll A state in which rolling cannot be achieved due to the elastic flattening of the material (in other words, even if force is applied to further increase the rolling reduction, the rolling roll flattens and the contact area between the rolling roll and the material increases, and the contact area between the rolling roll and the material increases.) (state where the surface pressure does not increase)
becomes. This phenomenon is common.

This is known as the rolling limit due to roll flattening. Conventionally, when rolling such materials, a method of reducing the roll diameter has been used in order to reduce the contact pressure between the rolling roll and the material and increase the contact pressure. This type of rolling mill includes, for example, Plasticity and Processing, 23 (1982) 26
3, the Sendzimir rolling mill discussed in P1123. However, when such small-diameter work rolls are used, the horizontal deflection of each work roll increases, which often has a negative effect on the properties of the plate, and the structure of the uniform rolling mill requires reinforcing rolls to prevent horizontal deflection. It becomes complicated, and its control also becomes complicated.

On the other hand, it is conceivable to perform rolling by heating the material with a winder to increase the temperature of the material and lower the deformation resistance value, such as in the Stellakel rolling mill. However, the two conventional techniques do not take into consideration the loss of 14 due to oxidation of the material, and if this technique is applied to positive ≦1 of 4 plates,
There were problems in that the plate lost a lot of sludge due to oxidation, making rolling impossible and making it impossible to obtain the desired plate material.

In addition, in the conventional technology, since the entire coil is heated, it takes time to maintain a uniform temperature even with an extremely thin material, and it is difficult to increase productivity.

The purpose of the present invention is to provide rolling equipment and a rolling method that can easily roll difficult-to-process materials such as ultra-thin materials and highly hard materials, and that cause extremely little loss due to oxidation of the material, and further , rolling equipment for highly productive ultra-thin materials and high-hardness materials.
The object of the present invention is to provide a rolling method.

Another object of the present invention is to provide a rolling equipment rolling method that can stably and easily roll ultra-thin materials and high-hardness materials with a relatively simple structure.

Still another object of the present invention is to provide rolling equipment and a rolling method that can adjust the quality of a plate material during rolling.

The inventors of the present invention have considered reducing the diameter of work rolls in order to actually roll 3-pole materials and high-hardness materials.

By reducing the diameter of the f1 work roll, rolling is possible, but horizontal deflection of the work roll is more likely to occur.
This adversely affects the properties of the board. Although it is possible to newly install reinforcing rolls to prevent horizontal deflection, the rolling equipment becomes complicated. In other words, it has been noticed that the smaller the work roll diameter is, the more complicated the rolling equipment becomes.

Therefore, the inventors changed their thinking and decided to investigate whether it would be possible to hot-roll ultra-thin materials, which had never been done before. Of course, if ultra-thin materials were hot-rolled using conventional methods, the sheets would quickly oxidize and turn into a mass of oxides. However, if oxygen could be blocked out, ultra-thin materials would be easier to heat because their surface area is larger than their volume, and heat would propagate in the thickness direction in a short period of time, resulting in a uniform temperature distribution. be.

[Means to solve the problem]

In order to achieve the above object, the present invention has a structure in which a heating device is provided on the entry side of the rolling mill to heat the plate immediately before rolling, thereby reducing the deformation resistance in a short time.

In addition, a heating device is installed on the exit side so that the material quality of the board can be adjusted.
Alternatively, a cooling device was installed to enable heat treatment of the plate material. Furthermore, in order to prevent loss of material during rolling due to oxidation, the rolling equipment was housed in a closed container 1 and constructed to be able to fill with inert gas. In other words, since the plate is placed in an airtight container of the rolling equipment and filled with inert gas, even if the plate is heated to high temperatures, it will not react with oxygen or the reaction will be small, preventing material loss due to oxidation and reducing the amount of material entering the rolling mill. - A heating and cooling device is installed on the exit side, and the structure is such that it is possible to control the plate temperature immediately before rolling and to heat-treat the plate material after rolling.

In addition, when rolling by actively applying tension during rolling,
If the plate temperature becomes too high than the set value, the plate may break due to tension.

To solve this problem, the present invention can prevent the plate from breaking. In other words, plate temperature detectors are installed on the inlet and outlet sides of the rolling mill, or on both sides, the detected value and the set value are compared, and the heating device is adjusted to cancel out the difference.
The tension was adjusted to prevent the plate from breaking. Therefore, even if the plate temperature were to rise due to some kind of disturbance, breakage of the plate material can be prevented and stable rolling can be performed.

〔Example〕

Hereinafter, the present invention will be explained in more detail using an example. FIG. 1 is a diagram showing an embodiment of the present invention, in which a rolling mill 42, a winding machine capable of unwinding, 5.degree. heating device 2. Board material 3
is housed in a closed container 1, and an inert gas 6 is sealed in the closed container 1. When the plate material 3 is heated by the heating device 2 on the entry side of the rolling mill 4, since the plate material 3 is thin, the temperature is uniformly raised in a short time, and the deformation resistance of the plate is reduced. Further, since the inert gas 6 is sealed inside the closed container 1, oxidation of the plate material 3 can be prevented. The plate material 3 with reduced deformation resistance is rolled 4i! 4, it is easily rolled.

According to this embodiment, loss due to oxidation of the plate material 3 can be prevented, and extremely thin materials and highly hard materials can be easily rolled.

Furthermore, by providing a heating device on the exit side, rapid cooling of the plate material 3 after rolling can be prevented, heat treatment of slopes [E] can be performed, and reverse rolling in which the rolling direction is changed can also be performed easily.

According to the present invention, it is possible to heat-treat the plate material 3, and further,
Reverse rolling can also be easily performed.

FIG. 2 is a diagram showing another embodiment of the present invention, in which the rolling mill 42
Rewindable winder5. Heating device 2゜Cooling device 7. A plate material 3 is housed in a closed container l, and an inert gas 6 is sealed therein. When the plate material 3 is heated by the heating device 2 on the entry side of the rolling mill 4, since the plate material 3 is thin, the temperature is uniformly raised in a short time and the deformation resistance is uniformly reduced. Moreover, since the inert gas 6 is sealed in the closed container 1, oxidation of the plate material 3 can be prevented. The plate material 3 with reduced deformation resistance is easily rolled by the rolling mill 4. Furthermore, the plate material 3 after rolling is heated by a heating device 2 provided on the exit side. Appropriate heat treatment is performed by cooling device 7.

According to this embodiment, loss due to oxidation of the plate material 3 can be prevented, extremely thin materials or highly hard materials can be easily rolled, and heat treatment can be performed after rolling. Further, by repeatedly performing reverse rolling in which the rolling direction is changed, there is an effect that the same rolling can be performed repeatedly.

In addition, by using high frequency heating as the heating device 2 in FIGS. 1 and 2, it becomes possible to heat the plate material 3 from within, and it is possible to raise the temperature of the plate material 3 more uniformly, making it possible to increase the temperature of the plate material 3 even if the plate thickness is somewhat thick. Also, rolling can be carried out easily in the same way.

FIG. 3 is also a diagram showing another embodiment of the present invention, and the essence of the invention is not different from the embodiment described in FIG. 1, and is a diagram illustrating an embodiment in tandem rolling. That is, in the figure, a rolling mill 42, a winding machine 5 that can unwind. Heating device 2. The plate material 3 is placed on a closed container, and an inert gas 6 is sealed inside the closed container↓. Heating bag on the 4-person side of the rolling machine!
+122, when the plate material 3 is heated, the thickness of the plate material 3 becomes dull, so the temperature is uniformly raised in a short time and the deformation resistance of the plate is reduced.

Further, since the inert gas 6 is sealed in the closed container 1, oxidation of the plate material 3 can be prevented. The plate material 3 with reduced deformation resistance can be easily rolled by the rolling mill 4.

According to this embodiment, loss due to oxidation of the plate material 3 can be prevented, and extremely thin materials and highly hard materials can be easily rolled.

Further, by providing a heating device on the exit side, rapid cooling of the plate material 3 after rolling can be prevented, and the plate material can be heat-treated, and reverse rolling in which the rolling direction is changed can be similarly easily performed.

According to this embodiment, the plate material 3 can be heat treated, and reverse rolling can also be easily performed.

FIG. 4 is also a diagram showing another embodiment of the present invention, and the essence of the invention is not different from the embodiment explained in FIG.
It is a figure explaining an example in tandem rolling. That is, the rolling mill 42, the rewindable winder 5. Heating device 2
．． Cooling device7. A plate material 3 is housed in a closed container 1, and an inert gas 6 is sealed therein. Rolling V! ! When the plate material 3 is heated by the heating device 2 on the inlet side of the plate 3, the temperature of the plate material 3 is raised uniformly in a short time because the thickness of the plate material 3 is thin, and the deformation resistance is uniformly reduced. Also, since the inert gas 6 is sealed in the airtight container 1,
Oxidation of the plate material 3 can be prevented. Plate material 3 with reduced deformation resistance
is easily rolled by the rolling mill 4.

Furthermore, the plate material 3 after rolling is heated by a heating device 2 provided on the exit side.
．． Appropriate heat treatment is performed by cooling device 7.

According to this embodiment, loss due to oxidation of the plate material 3 can be prevented, extremely thin materials or highly hard materials can be easily rolled, and heat treatment after rolling can be performed. Further, by repeatedly performing reverse rolling in which the rolling direction is changed, the same effect can be repeatedly obtained.

FIG. 5 is also a diagram showing an embodiment of the present invention, and in the embodiment of the present invention shown in FIG.
This is what was installed. Receiving the signal from the temperature sensor 13,
The temperature is detected by the temperature detector 8 and the signal is sent to the tension/plate temperature command device 12.

When receiving the plate temperature signal, the tension/plate temperature command device 2 calculates the difference between the set temperature and the detected temperature, and sends a signal to the heating control device 9 to set this difference.If the detected temperature is higher than the set value, sends a signal to the winder controller 11 to reduce the tension. Upon receiving the signal, the heating control device 9 controls the plate temperature on the input side and controls the heat treatment on the output side. Upon receiving the signal to reduce the tension, the winder controller 11 reduces the torque of the winder motor 10 or the torque of the winder motor 10. Winder motor 10
By reducing the torque or rotational speed of the plate, the plate tension is reduced and plate breakage is prevented.

According to this embodiment, even if the plate temperature rises above a set value due to some disturbance, it is possible to prevent the plate from breaking.

FIG. 6 also shows another embodiment of the present invention, in which temperature sensors 13 are installed on the inlet and outlet sides of the rolling mill of the embodiment in FIG. 2. Upon receiving the signal from the temperature sensor 13, the temperature detector 8
Detects the temperature and sends the signal to the tension/plate temperature command device 12. Receiving the plate temperature signal, the tension/plate temperature command device 12 calculates the difference between the set temperature and the detected temperature, and sends a signal to the heating/cooling control device 14 to determine the difference, so that the detected temperature is higher than the set temperature. If so, a signal is sent to the winder controller II to reduce the tension. Upon receiving the signal, the heating/cooling control device 14 performs plate temperature control on the input side and heat treatment on the output side. When the winder controller 11 receives the signal to reduce the tension, the torque of the winder motor 10 is decreased by the rotation speed. By reducing the torque or rotational speed of the winder motor '-O, the plate tension is reduced and plate breakage is prevented.

According to this embodiment, even if the plate temperature rises above the set value due to some disturbance, it is possible to prevent the plate from breaking.

FIG. 7 is also a diagram showing an embodiment of the present invention, in which temperature sensors 13 are installed at the entrance and exit sides of the rolling mill in the embodiment of the invention shown in FIG. Upon receiving the signal from the temperature sensor 13, the temperature detector 8 detects the temperature and sends the signal to the tension/plate temperature command device 12. The tension/plate temperature command device 12 receives the plate temperature signal.
calculates the difference between the set temperature and the detected temperature, sends a signal to the heating control device 9 to set the difference, and if the detected temperature is higher than the set value, a new set value is set to reduce the tension at that position. Each rolling speed control device 15. It is sent to each winder control device 11. In response to the signal, the heating control device 9 adjusts the plate temperature. In response to the new set values, each rolling speed control device 15 and each winding machine control device 11 change the rotational speed of each rolling mill motor 16 and the rotational speed or torque of each winding machine motor 10 to new set values. , the tension in the plate will be reduced and breakage of the plate will be prevented.

According to this embodiment, even if the plate temperature rises above the set value due to some disturbance, it is possible to prevent the plate from breaking.

FIG. 8 is also a diagram showing an embodiment of the present invention, in which temperature sensors 13 are installed at the entrance and exit sides of the rolling mill in the embodiment of the invention shown in FIG. Receiving the signal from the temperature sensor 13, the temperature detector 8 detects the temperature, and the signal is sent to the tension/plate temperature command device 1.
Send to 2. Upon receiving the plate temperature signal, the tension/plate temperature command device 12
Find the difference between the set temperature and the detected temperature, and send a signal to the heating/cooling control device 14 to set the difference. If the detected temperature is higher than the set value, a new set value is set to reduce the tension at that position. Each rolling speed control device 15. It is sent to each winder control device 11. Upon receiving the signal, the heating/cooling control device 14
Upon receiving the new set value, each rolling speed control device 15 and each winding machine control device 11 adjust the rotation speed of each rolling mill motor 16 and the rotation speed or torque of each winding machine motor to a new value. This setting value reduces the tension on the plate and prevents the plate from breaking.

According to this embodiment, even if the plate temperature rises above the set value due to some disturbance, the plate can be prevented from breaking.

〔Effect of the invention〕

According to the present invention, it is possible to stably and easily roll extremely thin materials and highly hard materials, and the quality of the plate material can be adjusted during rolling.

[Brief explanation of drawings]

1 to 8 are detailed explanatory diagrams of the present invention. 1... Airtight container, 2... Heating device, 3... Board material,
4... Rolling machine, 5... Winding machine capable of unwinding, 6...
...Inert gas, 7. Cooling device, 8. Temperature detector, 9. Heating control device, IO. Winding machine motor, 11. Winding machine control device, 12. ··tension·
Plate temperature command device, 13...Temperature sensor, 14...Heating/cooling control device, ■5...Fig. Red 2 Fig. Fig. Fig. 5 Fig. 6 Fig. 7

Claims (1)

[Claims] 1. In a rolling facility equipped with a rolling mill for rolling a plate material and a winding device for the plate material, the plate material can be heated on the entry side of the rolling mill, the exit side, or both sides thereof. 1. A rolling equipment comprising: a heating device; these devices are provided in a sealable container; and an inert gas is sealed in the container. 2. The rolling equipment according to claim 1, further comprising a cooling device for cooling the plate material on the entry side, exit side, or both sides of the rolling mill. 3. The rolling equipment according to claim 1, wherein the heating method is high frequency heating. 4. The rolling equipment according to claim 2, wherein the heating method is high frequency heating. 5. The rolling equipment according to claim 1, wherein the number of rolling mills and the number of heating devices are plural. 6. The rolling equipment according to claim 2, wherein the number of rolling mills, the heating device, and the cooling device are plural. 7. A rolling method characterized by using the rolling equipment according to claim 1 and heating the rolled material on the inlet side, the outlet side, or both sides of the rolling mill. 8. A rolling method using the rolling equipment according to claim 2, wherein the rolled material is heated and cooled on the entry side, exit side, or both sides of the rolling mill. 9. A rolling method comprising heating the rolled material using the rolling equipment according to claim 3. 10. A rolling method comprising heating and cooling the rolled material using the rolling equipment according to claim 4. 11. A rolling method characterized by heating the rolled material using the rolling equipment according to claim 5. 12. A rolling method comprising heating and cooling the rolled material using the rolling equipment according to claim 6. 13. In the rolling equipment according to claim 1, a plate temperature detector is installed on the inlet side or the outlet side of the rolling mill, or on both sides thereof, and the detected value and the set value are compared and the difference is canceled. A rolling control method characterized in that the heating device is adjusted so as to adjust the tension of the plate material. 14. In the rolling equipment according to claim 2, a plate temperature detector is installed on the inlet side or the outlet side of the rolling mill or on both sides thereof, and the detected value and the set value are compared, and the A rolling control method, comprising adjusting the heating device and the cooling device, as well as adjusting the tension of the plate material. 15. In the rolling equipment according to claim 5, a plate temperature detector is installed on the inlet side or the outlet side of the rolling mill, or on both sides thereof, and the detected value and the set value are compared and the difference is canceled. A rolling control method characterized by adjusting the heating device and adjusting the tension of the plate material. 16. In the rolling equipment according to claim 6, a plate temperature detector is installed on the inlet side or the outlet side of the rolling mill, or on both sides thereof,
A rolling control method comprising comparing a detected value and a set value, and adjusting the heating device and the cooling device as well as the tension of the plate material so as to cancel out the difference.