JP2737353B2 - Roll for rolling and method for rolling thin sheet using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a thin sheet material, particularly an ultra-thin sheet material having a thickness of 0.1 mm or less, called a foil, having a uniform thickness and a meandering amount. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll for rolling capable of rolling while keeping it small, and a method for rolling a thin plate using the same.

[Prior art] It is very difficult to roll a thin sheet material, especially an ultra-thin sheet material such as a foil, and even if there is a slight warp of a work roll or a difference in a roll gap in a sheet width direction, a uniform sheet thickness is obtained. In addition to the rolling, it is not possible to obtain a sound rolling material because of the occurrence of ear waves of the rolled plate material and the meandering of the whole rolled material.

Therefore, each rolling mill maker has tried to cope with the above-mentioned sheet rolling by increasing the number of rolls having different diameters. So far, a Y-type rolling mill, a lone multi-high rolling mill, or a Sendjimiya multi-high rolling mill has been proposed. I have.

Such a multi-high rolling mill makes the diameter of the work roll as small as possible, reduces the area of the work roll in contact with the rolled material, concentrates the rolling force of the rolling mill on the work roll, and enables foil rolling. As work rolls, rolls having high hardness, low bending resistance and small surface flat deformation have been developed and used.

[Problems to be Solved by the Invention] In the multi-high rolling mill described above, a number of intermediate rolls and reinforcing rolls are arranged behind the work rolls.
The intermediate roll and the reinforcing roll prevent the work roll from bending as much as possible, and are configured so that a flat foil can be rolled.

However, in the above case, since the number of intermediate rolls and reinforcing rolls is large, the adjustment thereof is very complicated and troublesome, and it requires a high level of skill, skill and time to adjust the rolls before rolling. There was a problem.

Therefore, it can be said that an HC mill having a six-stage configuration or a modified version thereof as a rolling mill that does not dispose a large number of rolls as described above and that exhibits rolling performance equal to that of a conventional rolling mill having a large number of rolls. A UC mill was proposed.

 FIG. 12 is an explanatory front view showing the configuration of the HC mill.

That is, in the HC mill, as shown by the arrow in FIG. 12, the intermediate roll 2 shifts in the axial direction of the roll, and the work roll 1 'has a bending mechanism. Since the intermediate roll 2 can be shifted, the work roll 1 ′ can be pressed not at the roll middle portion where warpage is likely to occur but at the roll end portion where warpage is unlikely to occur. In order to make the distribution uniform, the bending mechanism is adjusted to obtain a nearly flat plate material.

FIG. 13 is an explanatory front view of the UC mill, and FIG. 14 is an explanatory side view thereof.

This UC mill has essentially the same configuration as the HC mill described above, but as shown by the arrow in FIG. 13, the intermediate roll 2 shifts in the axial direction and can be bent, so that finer adjustment is possible. It is configured to be able to. A UC mill having a support roll 4 as shown in FIG. 14 has been developed in order to cope with the longitudinal deflection during rolling due to the reduction in the diameter of the work roll 1 '.

As described above, the HC mill or the CU mill has the shift mechanism and the roll bending mechanism for the intermediate roll 2, and has excellent correcting ability. However, while having such a high correction capability, there is a problem that the operation parameters of the rolling mill are many and handling is difficult as in the multi-high rolling mill described above.

In particular, when rolling an extremely thin strip called a foil, the adjustment of the above control parameters is extremely severe.

Furthermore, in the case of copper foil rolling, the above-mentioned HC mill or UC
Another problem is that the shift of the intermediate roll 2, which is the largest feature of the mill, cannot be set over the entire range that can be mechanically set.

In other words, since it can be set mechanically,
As shown in FIG. 11 (only the upper half is shown here), the roll end 2a of the intermediate roll 2 is a strip plate to be rolled.
When the roll is adjusted to a state where it is inserted into the inside of the sheet edge 10a by only -l, the gloss of the rolled foil becomes different from the roll end 2a at the position of -l. Since such a difference in gloss deteriorates the quality of the product, such setting of the intermediate roll 2 must be avoided. For this reason, as shown in FIG. 10, the position of the roll end 2a of the intermediate roll 2 is set outside the plate edge 10a by + l, and the intermediate roll 2 is set in a range where it is unavoidable to correct the shape. I have to. As described above, correction of the shape in the HC mill or the UC mill is performed by the bending mechanism of the work roll 1 ′ or the intermediate roll 2 in addition to the shift of the intermediate roll 2.
There are many combinations of both bending powers,
If the set position of the roll end 2a of the intermediate roll 2 is restricted as described above, it is very difficult to select an appropriate combination.

In addition, in copper foil rolling, the difference in roll gap between the driving side and the operation side of the rolling mill is relatively large compared to the sheet thickness, and the difference in reduction becomes large accordingly.
The rolled material tends to meander in the roll axis direction,
Meandering also occurs due to the left-right imbalance of the tension, the off-center of the material, the left-right imbalance of the material itself, and the like.

An object of the present invention is to solve the problems of the prior art as described above, and to provide a novel rolling roll capable of rolling an extremely thin plate material more flat and without meandering or generating an ear wave. An object of the present invention is to provide a method of rolling a thin sheet material using the same.

Means for Solving the Problems The present invention is configured such that the outer diameter of the rolled portion of the work roll is smaller than the outer diameter of the non-rolled portion, and a roll kiss occurs in the non-rolled portion during rolling. Or a tapered surface that tapers in the direction of the rolled portion in the non-rolled portion, so that the reaction force when roll kissing is further increased, and The work roll having such a configuration is incorporated in a rolling mill of 4 to 20 stages, and a roll kiss is generated to perform rolling.

[Operation] If the outer diameter of the non-rolled portion of the work roll is larger than that of the rolled portion, a roll kiss can be easily generated at the end of the work roll during strip rolling.

By kissing the work roll in this way, if a reaction force is generated by the roll kiss, the deflection of the work roll is reduced by the adverse effect of the reaction force, making it possible to roll ultrathin strips with a flatter shape than before Becomes

Also, in kiss rolling, the load on the narrower roll gap at the roll kiss portion increases, and the reaction force increases.As a result, the parallelism between the upper and lower work rolls improves, and a rolled material with a small meandering amount can be obtained. Also.

[Examples] Hereinafter, the present invention will be specifically described in order with reference to the drawings of the examples.

FIG. 1 is an explanatory front view showing an embodiment of the work roll 1 according to the present invention. Work roll 1 is more in a non-rolling portion 1b which is not involved in the rolling and the rolling unit 1a for rolling a strip, non the radial direction of the outer diameter D ₂ of the rolling portion 1b is larger than the outer diameter D ₁ of the rolling portion 1a is configured so that, between the two D ₁ -D ₁ =
A diameter difference of ΔD is formed. This large non-rolled portion 1b generates a roll kiss during strip rolling.

FIG. 6 shows a conventional work roll 1 ′ having the same outer diameter from the rolled portion to the non-rolled portion without increasing the diameter of the non-rolled portion as described above, and a four-stage combination of this and a reinforcing roll 3. FIG. 7 is an explanatory front view showing a state where the strip 10 is being rolled using a rolling mill, and FIG. 7 is an explanatory side view thereof.

In this conventional apparatus, the work roll 1 'has a bending mechanism as shown by an arrow in FIG. 6, and has a structure to cope with thermal expansion during rolling and deflection of the roll. However, such shape correction only by bending the work roll has limitations in shape control such as quarter buckle and middle end elongation, especially in the case of foil rolling, in the case of the conventional HC mill or UC mill already described. Similarly, the condition setting becomes extremely severe,
The meandering in the roll axis direction is likely to occur due to the difference in roll gap between the drive side and the operation side of the rolling mill.

FIG. 5 is an explanatory front view showing a state where the strip 10 is being rolled by the four-high rolling mill according to the present invention, which is configured to solve the above-mentioned problems.

In FIG. 5, the work roll according to the present invention is configured such that the outer diameter of the non-rolled part is larger than the outer diameter of the above-described rolled part rather than the same diameter over the entire length as in the conventional example. 1 is used. When the strip 10, especially a thin strip called a foil, is rolled by the work rolls 1, 1, the non-rolled portions having large diameters at both ends easily come into contact with each other to form a so-called roll kiss state.

FIG. 4 is an explanatory diagram showing a stress distribution in the non-rolled portion 1b when the strip 10 is rolled by the work rolls 1 and 1 according to the present invention as described above to generate a roll kiss 1c.

The stress distribution increases toward the outside of the roll 1, but if the stress distribution increases toward the outside in this manner, a reaction force against the rolled portion 1a of the roll is generated correspondingly, and the deflection of the rolled portion 1a is increased. Is corrected, and a reaction to keep the rolling section 1a horizontal is effected. Due to the generation of this reaction force, the strip 10 as the material to be rolled is rolled to a very flat state.

If there is a difference in the roll gap between the left and right work rolls 1 and 1 in the drawing, the smaller the gap, the greater the reaction force due to the roll kiss, and the reduction force caused by the difference in the roll gap automatically occurs due to the reaction force. Is corrected, and the meandering of the rolled material seen when using the conventional work roll having the same outer diameter is thereby avoided.

In order to enhance the excellent effects that can occur by generating Rorukisu described above further do not form an outer periphery of the non-rolled portion 1b as shown in FIG. 1 in the same diameter D _2, as shown in FIG. 2 preferably formed on the tapered surface 1b ₁ which gradually tapers toward the rolling section 1a side. If formed in this way, the stress at the time of kissing at both ends of the roll is maximized,
The generation of a large reaction force and the effect of modifying the shape of the rolled material accompanying the generation of the reaction force can be expected.

However, if the tapered surface is formed as shown in FIG. 2, the kissed portion may be worn faster. In order to avoid this, as shown in FIG. 3, one part of the non-rolled portion 1b is made to be a surface parallel to the roll axis, and is directed to the rolled portion 1a from halfway. It may be formed on the stepped tapered surface 1b _2. In this case, there is an effect that can increase the reaction force of only the roll ends min with a step tapered surface 1b _2, yet has a feature that can reduce the wear of the roll ends by kiss to also have parallel faces.

Which shape of the work roll shown in FIGS. 1 to 3 is to be selected may be appropriately selected in consideration of the material of the roll, the material of the rolled material, the thickness thereof, and the like.

The above is an example in which the work roll according to the present invention is used in a four-high rolling mill, but it goes without saying that the rolling mill to be used is not limited to the four-high rolling mill.

FIG. 8 is an explanatory front view showing an example in which the work rolls 1, 1 according to the present invention are applied to the HC mill or UC mill which is the above-described six-high rolling mill. In this case, the above-described shape correcting action by rolling kiss works remarkably,
The necessity of the adjustment by the shift and bending of the intermediate roll 2 is significantly reduced, and a great advantage that the roll adjustment work can be further easily and simplified can be exhibited.

FIG. 9 is a diagram in which the stress distribution in the rolling direction under a certain rolling condition in the case of using the work roll of the conventional example having the same overall length and the work roll according to the present invention is numerically calculated and plotted. . From FIG. 9, it can be seen that in the present invention, since kiss rolling is performed, the stress distribution thereof is more uniform than in the conventional example.

FIG. 18 is an explanatory front view of a 12-high rolling mill, and FIG. 19 is an explanatory side view thereof.

FIG. 21 is an explanatory side view of a 20-high rolling mill, and FIG.
The figure is an explanatory front view showing the upper half thereof.

In the case of a 12-high rolling mill, in addition to the intermediate roll 2 being configured to be shiftable, the reinforcing roll 3 is divided and configured to be eccentric, and the shift mechanism of the intermediate roll 2 and the eccentricity of the reinforcing roll 3 are set. The structure has a high shape correcting ability by the mechanism.

In the case of a 20-high rolling mill, the structure thereof is not much different from that of the above-mentioned 12-high rolling mill except that it has the second intermediate roll 5, and similarly, the shift mechanism of the intermediate roll 2 and the eccentricity of the reinforcing roll 3 It has a configuration capable of exhibiting a high shape correcting ability by a mechanism.

However, in both the 12-high rolling mill and the 20-high rolling mill, there is a restriction on the shift amount of the intermediate roll 2 as described above in the HC mill and the UC mill.

That is, in the case of copper foil rolling or the like, since it can be set mechanically, as shown in FIG. 17, the roll end 2a of the intermediate roll 2 is located inside the plate edge 10a of the material 10 to be rolled. When the roll is adjusted to the state where it is inserted by -l, the gloss of the rolled foil becomes different from the roll end 2a at the position of -l. For this reason, as shown in FIG. 16, the position of the roll end 2a of the intermediate roll 2 is set at + l outside the plate edge 10a, and the intermediate roll 2 is set in a range where it is unavoidable to modify the shape. I have to.

This is the same as that described for the HC mill and the UC mill, but in the 12-high rolling mill or the 20-high rolling mill, a shape correcting function by the eccentric mechanism of the reinforcing roll 3 is further added thereto. If the shift amount of the intermediate roll 2 is restricted, the roll adjustment for correcting the shape becomes more complicated and the difficulty increases.

However, even in these 12-high rolling mill and 20-high rolling mill, by using the work roll according to the present invention,
The adjustment for correcting the shape can be greatly simplified.

FIG. 15 shows a work roll 1 according to the present invention in a 12-high rolling mill.
1, and FIG. 20 is an explanatory front view showing a state where the strip 10 is being rolled using the work rolls 1, 1 according to the present invention in a 20-high rolling mill.

Thus, even in the case of misalignment of a rolling mill having an extremely large number of stages such as the above-described 12-high rolling mill or 20-high rolling mill, the non-rolled portion 1b is roll-kissed and rolled, so that the reaction force based on the roll kiss described in detail above is obtained. The self-correcting effect is caused by this, it is possible to roll a flat strip without complicated roll adjustment, and it is possible to obtain a very healthy rolled sheet material with very little meandering. In this case, the problem due to the shift constraint of the intermediate roll 2 is greatly improved.

In addition, about the shape of the non-rolled part side of the work roll,
Although an example in which the taper surface is described earlier, this taper angle is not limited to a single inclination angle, but may be changed to a plurality of angles, or the entire surface may be changed in an arc shape.

In any case, the present invention is based on the premise that roll kiss occurs, and in that sense, the diameter of the rolled portion
It is a matter of course that what value is the difference ΔD between D ₁ and the diameter D ₂ of the non-rolled portion is the most important.

Further, in the present invention, both the upper and lower pair of work rolls are not configured with the work roll according to the present invention in which the outer diameter of the non-rolled portion is larger, but one of them is configured as such and the other is a conventional example. The use of a roll having a single outer diameter over the entire length as described above is acceptable. However, it is needless to say that it is desirable to use the roll having the shape according to the present invention for both the upper and lower sides in order to expect a greater effect.

Further, the object to be rolled is not limited to the illustrated copper, but can be applied to stainless steel, aluminum, and all other rollable materials that can be rolled.

[Effects of the Invention] As described above, according to the rolling roll and the rolling method according to the present invention, a great contribution is made to the uniformity of the plate thickness and the improvement of the flatness thereof as compared with the conventional example, In addition to improving the rolling workability, such as facilitating and simplifying the adjustment of the roll, the ability to obtain a flat sheet material enables the use of a substrate on a printed circuit board to be used in, for example, copper foil. Such as improving the adhesion
Numerous industrial advantages can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing an embodiment of a work roll according to the present invention, FIGS. 2 and 3 are explanatory front views showing another two embodiments, and FIG. FIG. 5 is an explanatory view showing a state of stress distribution at the time of rolling in a state in which
FIG. 1 is an explanatory front view showing a situation in which the present invention is applied to a four-high rolling mill. FIG. 6 is an explanatory front view of a conventional four-high rolling mill.
Fig. 8 is an explanatory side view, Fig. 8 is an explanatory front view showing a situation where the present invention is applied to a 6-high HC mill or UC mill, and Fig. 9 is a rolling method according to the present invention in a 6-high rolling mill and a conventional method. Diagrams plotting the results of numerical calculation of the stress distribution when the rolling method in the example is applied, FIGS. 10 and 11 are explanatory diagrams showing the positional relationship between the roll edge of the intermediate roll and the edge of the rolled strip, 12 is an explanatory front view of an HC mill, FIG. 13 is an explanatory front view of a UC mill, FIG. 14 is an explanatory side view thereof, and FIG. 15 is an explanatory front view showing a state where the present invention is applied to a 12-high rolling mill. , 16th
And FIG. 17 is an explanatory view showing the positional relationship between the intermediate roll end and the strip end of the strip in the twelfth or 20-high rolling mill, FIG. 18 is an explanatory front view showing the conventional configuration of the 12-high rolling mill, and FIG. Fig. 20 is an explanatory side view thereof, Fig. 20 is an explanatory front view showing a state where the present invention is applied to a 20-high rolling mill, Fig. 21 is an explanatory side view showing a configuration of a conventional 20-high rolling mill, and Fig. 22 is It is explanatory front view which shows the upper half. 1: Work roll, 1a: Rolled part, 1b: Non-rolled part, 1b ₁ : Tapered surface, 1b ₂ : Step tapered surface, 1c: Roll kiss part, 2: Intermediate roll, 3: Reinforcement roll, 10: Strip.

Claims (6)

(57) [Claims] At least one of a pair of work rolls,
The outer diameter of the rolled portion of the work roll is configured to be smaller than the outer diameter of the non-rolled portion, and the pair of work rolls is configured to generate a roll kiss in the non-rolled portion during rolling. Roll for rolling. 2. A non-rolled portion of a work roll configured such that the outer diameter of the rolled portion is smaller than the outer diameter of the non-rolled portion, wherein a tapered surface tapering in the direction of the rolled portion is formed on the non-rolled portion. The roll for rolling according to claim 1, wherein 3. A method for rolling a thin sheet material comprising using a pair of work rolls according to claim 1 or 2 and incorporating the work rolls into a four-high rolling mill to produce roll kisses. 4. A method for rolling a thin plate material comprising using a pair of work rolls according to claim 1 or 2 and incorporating the work rolls into a six-high rolling mill and rolling in a state where roll kisses are generated. 5. A method for rolling a thin sheet material, comprising using a pair of work rolls according to claim 1 or 2 and incorporating the work rolls into a 12-high rolling mill to produce roll kisses. 6. A method for rolling a thin sheet material comprising using a pair of work rolls according to claim 1 or 2 and incorporating the work rolls into a 20-high rolling mill and rolling in a state where roll kisses are generated.