JP2004136328A - Multiple rolling mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple rolling mill for changing the work roll diameter over an extensive range by one rolling mill. <P>SOLUTION: When dissimilar materials of different deformation resistance are rolled by using one multiple rolling mill, the roll stage number and the work roll diameter of the rolling mill are changed to the roll stage number and the diameter suitable for the deformation resistance of the material. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a multi-high rolling mill used for sheet metal rolling.
[0002]
[Prior art]
When a very thin plate (foil) having a thickness of 0.1 mm or less is rolled using a multi-high rolling mill, a hard material having a large deformation resistance, such as a stainless steel material, uses a work roll having a small diameter of at least about 20 mm, and copper or the like. In the case of the soft material, a large work roll having a maximum diameter of about 200 mm was used.
As such a multi-high rolling mill for ultra-thin sheet rolling, there are a 12-high rolling mill and a 20-high rolling mill each having a plurality of backup rolls above and below (see Patent Document 1).
[0003]
These 12-high rolling mills and 20-high rolling mills have higher lateral rigidity than 4-high or 6-high rolling mills, and are capable of rolling ultra-thin plates (foil) in good shapes. Further, in these 12-high and 20-high rolling mills, it was possible to change the work roll diameter from the minimum diameter to the maximum diameter in the range of about 2 to 4 times, but the work roll diameter was wide in the range of 20 mm to 200 mm. Could not be changed.
Therefore, since a single rolling mill could not roll materials having greatly different deformation resistances, it was necessary to provide a rolling mill dedicated to stainless steel and a rolling mill dedicated to copper alloy.
[0004]
[Patent Document 1]
Japanese Patent Publication No. 5-5561
[Problems to be solved by the invention]
In the conventional technique, when rolling materials having greatly different deformation resistances, rolling equipment corresponding to the materials must be provided (for example, when rolling two types of materials having significantly different deformation resistances, two types of rolling equipment are required). Equipment was required), the cost of capital investment increased, and it was not economical.
Therefore, an object of the present invention is to provide a multi-high rolling mill in which the work roll diameter can be changed over a wide range with one rolling mill.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has taken the following measures. That is, the feature of the present invention is that, when different materials having different deformation resistances are rolled using one multi-high rolling mill, the number of roll stages and the work roll diameter of the rolling mill are adjusted to the deformation resistance of the material. The point is that the number of steps and diameter can be changed.
Further, a feature of the present invention is that in a multi-high rolling mill including a pair of upper and lower rolls each including a work roll, an intermediate roll, and a backup roll, the multi-stage rolling mill includes four upper and lower backup rolls, and And the intermediate rolls are exchanged to switch between a 14-high rolling mill and a 20-high rolling mill.
[0007]
Further, a feature of the multi-high rolling mill of the present invention is that a roll group having a work roll, two intermediate rolls supporting the work roll, and four backup rolls supporting the intermediate roll is provided. It has a pair of upper and lower parts to constitute a 14-high rolling mill.
The work roll and the intermediate roll are divided into another work roll, two first intermediate rolls supporting the work roll, and three third intermediate rolls supporting the first intermediate roll and supported by the backup roll. By replacing with two intermediate rolls, the 14-high rolling mill can be changed to a 20-high rolling mill.
[0008]
Preferably, the two intermediate rolls of the 14-high rolling mill are used as they are as the left and right second intermediate rolls in the 20-high rolling mill after switching.
In the 14-high rolling mill, a roll diameter of the work roll can be changed in a range of 65 mm to 200 mm.
In the 20-high rolling mill, a roll diameter of the work roll can be changed in a range of 20 mm to 80 mm.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The one shown in FIG. 1 is a 14-high rolling facility, for example, in which tough pitch copper (C1100) is rolled into a foil having a thickness of about 9 μm by cold reverse rolling.
The reverse rolling equipment includes a multi-high rolling mill 1 disposed at the center in the left-right direction of FIG. 1, a wiping device 2 disposed on both sides of the multi-high rolling mill 1, and a sheet thickness disposed outside the wiping device 2. It has a measuring device 3, a shape detecting roller 4a disposed outside the plate thickness measuring device 3, a deflector roller 4b and a winding / rewinding device 5 disposed outside the shape detecting roller 4a.
[0010]
The wiping device 2 efficiently removes the rolling oil used in the rolling mill 1 and uses a three-roller roller wiper or the like. The plate thickness measuring device 3 measures the thickness of a plate during rolling, and uses an X-ray type thickness gauge. The shape detection roller 4a detects a plate shape. By performing feedback control of a shape control actuator such as a lateral adjustment device or a crown control device of the rolling mill 1 based on the detected value of the plate shape, the plate shape can be controlled within a predetermined range.
[0011]
FIG. 2 shows a roll arrangement of the multi-high rolling mill 1, and includes a work roll 6, two intermediate rolls 7 supporting the work roll 6, and four backup rolls supporting the intermediate roll 7. 8 and a pair of upper and lower rolls is configured in 14 stages.
The path between the pair of upper and lower work rolls 6 is a pass line through which the rolled material 9 passes. The pair of upper and lower rolls are vertically symmetrically arranged with the pass line interposed therebetween, and are symmetrically arranged with a vertical center line orthogonal to the pass line and passing through the center of the upper and lower work rolls 6 interposed therebetween.
[0012]
All of the intermediate rolls 7 are drive rolls, and the other rolls 6, 8 are idle rolls. Since the intermediate rolls 7 are arranged far apart in the left-right direction, the size of the drive spindle can be increased. As a result, the critical rotation speed of the spindle increases, and high-speed rolling in the 800 to 1000 m / min class becomes possible, and a large transmission power can be obtained.
The intermediate roll 7 has a lateral adjustment device that has one end formed in a tapered shape and is capable of shifting in the axial direction.
[0013]
The backup roll 8 includes a plurality of bearings arranged on the support shaft along the axial direction. Roll-down devices are provided on the backup rolls 8a on the left and right sides on the lower side. As this rolling device, a wedge type rolling device is adopted. Crown adjustment devices are provided on the backup rolls 8b on both the left and right sides of the upper part. As the crown adjusting device, one that extrudes the axis of the support shaft of the backup roll 8 at a plurality of positions in the axial direction and bends the support shaft is employed.
Each of the rolls 6, 7, and 8 can be exchanged, and the work roll 6 can be changed from 65 mm to 200 mm in diameter. In addition, as the roll changing device, for example, a changing device described in JP-A-7-256317 can be used.
[0014]
In order to reverse roll the drawn copper using the above-mentioned rolling equipment, the copper roll is rolled using a small-diameter work roll 6 and, if necessary, a skin pass is performed using a large-diameter work roll 6 of, for example, 130 to 200 mm in a final pass.
Next, a case where stainless steel (SUS304) is rolled into a 10-μm-thick foil using the above-mentioned rolling equipment will be described.
In this case, the 14-high rolling mill is used as a 20-high rolling mill.
That is, the roll is changed to a 20-high rolling mill having the roll arrangement shown in FIG.
[0015]
The roll change from the 14th stage to the 20th stage is performed as follows.
First, a large-diameter work roll 6 is extracted from a 14-high rolling mill. The intermediate roll 7 is left as it is used as the second intermediate roll 7 of the next 20-high rolling.
A new small-diameter work roll 6a and two first intermediate rolls 10 supporting the work roll 6a are inserted. Then, a new second intermediate roll 7a is inserted between the left and right second intermediate rolls 7 left. The second intermediate rolls 7 and 7a support the first intermediate roll 10 and are supported by the backup roll 8.
[0016]
Of the three second intermediate rolls 7 and 7a, the left and right rolls are drive rolls, and the central roll is a free roll. The drive system is the same as in the case of the above-described 14 stages. At the time of the roll change, the left and right drive rolls can also be changed to new ones.
The diameter of the work roll 6a in this 20-high rolling mill can be changed in a range of 20 mm to 80 mm, more preferably in a range of 25 to 65 mm.
[0017]
When a 20-high rolling mill is used by switching to a 14-high rolling mill, the rolls may be changed in the reverse procedure.
According to the embodiment, a stainless steel material having a large deformation resistance and a different material such as a copper alloy having a small deformation resistance are obtained by changing the number of steps and the diameter of a work roll by using a single rolling facility. Can be rolled.
Further, since the center distance between the left and right drive rolls can be increased, the diameter of the drive spindle can be increased, and high-speed and high-torque rolling can be performed.
[0018]
The deformation resistance of the copper / copper alloy material is significantly different from that of the stainless steel material (for example, the deformation resistance of SUS301 at a total reduction ratio of 30% is about five times that of tough pitch copper (C1100). The deformation resistance of SUS304 is tough pitch. The deformation resistance of SUS301 is about 4.5 times that of tough pitch copper (C1100) at a total rolling reduction of 70%, and the deformation resistance of SUS304 is about 4 times that of tough pitch copper (C1100). Conventionally, it was difficult to roll both of them in a good shape with one rolling facility.
[0019]
That is, in the case of foil rolling with a thickness of 0.1 mm or less, in a case where a 10 μm foil of SUS304 material, which is often produced from stainless steel, is manufactured at a total draft of 50%, a work roll of about 25 mm must be used. However, even if it was rolled, it did not become thin (the work roll was flat and could not be rolled), and it could not be practically produced.
On the other hand, in an example of manufacturing a 10 μm foil of the softest tough pitch copper among copper materials at a total reduction of 50%, a rolling equipment having a large work roll diameter of about 70 mm to 130 mm is suitable, and a small work roll of 25 mm is used. Is difficult to obtain a good shape.
[0020]
However, according to the embodiment of the present invention, both can be rolled by one rolling facility.
By the way, conventionally, it has been possible to change the work roll diameter from a minimum diameter to a maximum diameter of about four times in a 12-high rolling equipment (for example, about 25 mm to 100 mm).
However, in this conventional method, since only the work roll diameter is simply increased, when the roll diameter is increased, most of the rolling load is applied to the backup roll at the center in the left-right direction, so the rolling load is limited. It can be used only in the state in which the skin pass is performed, and is limited to the use in the case of mainly performing a so-called skin pass.
[0021]
However, according to the embodiment of the present invention having the above-described configuration, since rolling is performed while changing the number of stages, the rolling load can be sufficiently supported.
Note that the present invention is not limited to the above-described embodiment.
[0022]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it is possible to switch from a hard material such as stainless steel to copper or the like by using one (one type) rolling equipment without using two (two types) rolling equipment dedicated to stainless steel and copper / copper alloy. It is possible to roll even soft materials.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a rolling facility showing an embodiment of the present invention.
FIG. 2 is a roll layout diagram of 14-high rolling.
FIG. 3 is a roll layout diagram of 20-high rolling.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Multi-high rolling mill 6 Work roll 7 Intermediate roll 8 Backup roll 10 1st intermediate roll

Claims (7)

When rolling dissimilar materials having different deformation resistances using one multi-high rolling mill, the number of roll stages and the work roll diameter of the rolling mill can be changed to the number of stages and diameters suitable for the deformation resistance of the material. A multi-high rolling mill. In a multi-high rolling mill provided with a pair of upper and lower rolls consisting of a work roll, an intermediate roll, and a backup roll,
A multi-high rolling mill having four upper and lower backup rolls, and switching between a 14-high rolling mill and a 20-high rolling mill by exchanging the work roll and the intermediate roll. A 14-high rolling mill comprising a pair of upper and lower rolls each including a work roll, two intermediate rolls supporting the work roll, and four backup rolls supporting the intermediate roll. And multi-high rolling mill. The work roll and the intermediate roll are divided into another work roll, two first intermediate rolls supporting the work roll, and three third intermediate rolls supporting the first intermediate roll and supported by the backup roll. The multi-high rolling mill according to claim 3, wherein the 14-high rolling mill is changed to a 20-high rolling mill by replacing with two intermediate rolls. The two intermediate rolls in the 14-high rolling mill are directly used as the rolls located on the left and right of the three second intermediate rolls in the 20-high rolling mill. Multi-high rolling mill. 4. The multi-high rolling mill according to claim 2, wherein in the 14-high rolling mill, a roll diameter of the work roll can be changed in a range of 65 mm to 200 mm. 5. 5. The multi-high rolling mill according to claim 2, wherein, in the 20-high rolling mill, a roll diameter of the work roll can be changed in a range of 20 mm to 80 mm. 6.

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