JPH08215704A - Method of adjusting camber in cold skin-pass rolling mill - Google Patents

Abstract

PURPOSE: To simplify adjustment of camber by fixedly providing two deflector rolls between auxiliary rolls for adjusting camber and zigzag arranging these respective rolls on the upper and lower surfaces of a steel sheet along the threading direction. CONSTITUTION: The deflector rolls 13, 14 for changing the advancing direction of the cold rolled sheet 3a are arranged between the auxiliary rolls 11, 12 for adjusting camber so that the deflector rolls are mutually regulated their separation and vertical movement and are zigzag to the upper and lower surfaces of the cold rolled sheet 3. At the time of adjusting the camber of the cold rolled sheet 3 with the auxiliary rolls 11, 12 for adjusting camber, even when intermesh on one side is changed by vertically moving the auxiliary roll 11 or 12 for adjusting camber, the contact angle of the cold rolled sheet 3 to the other auxiliary roll 12 or 11 for adjusting camber is made to be un-changeable. In this way, the change of intermesh with the auxiliary rolls 11, 12 for adjusting camber is independently executed and the adjustment of upward camber and downward camber is simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp adjusting device for a cold temper rolling mill.

[0002]

2. Description of the Related Art In temper rolling of a tin plate (cold rolled steel sheet), a temper rolling mill generally composed of two stands is used. By the way, the tin plate has a thickness of 0.15
Since it is as thin as 0.60 mm, warpage is likely to occur in the temper rolling process. As a device for adjusting this warp, for example, a device described in Japanese Patent Publication No. 6-245 is known.

This device, as shown in FIG. Two
Between the work roll b of the stand a and the bridle roll c arranged on the exit side of the work roll b, the cold rolled steel plate d
The two warp adjusting auxiliary rolls e and f which are provided separately from each other along the traveling direction of
The warp adjusting auxiliary rolls e and f are individually moved up and down to change the intermesh (the relationship between the upper and lower contact positions of the cold-rolled steel plate with respect to the rolls), and the L of the cold-rolled steel plate d is changed by the tension leveler effect by the tensile bending at the time of change. The vertical warpage of warpage (longitudinal warpage) and C warpage (widthwise warpage) is adjusted.

[0004]

When the two warp adjusting auxiliary rolls e and f are installed between the work roll b and the bridle roll c, the work roll b is usually used.
Side warp adjusting auxiliary roll e on the lower surface side of the cold rolled steel plate d,
The warp adjusting auxiliary rolls f on the bridle roll c side are arranged in a staggered manner on the upper surface side of the cold rolled steel sheet d, and the cold rolled steel sheet d is wound around.

However, in such a warp adjusting apparatus, when the warp adjusting auxiliary roll e on the work roll b side is moved up and down to change one intermesh in order to adjust the warp, the cold-rolled steel plate of the warp adjusting auxiliary roll f is changed. There is a problem that the winding angle of d changes and the other intermesh changes, resulting in difficulty in adjusting the vertical warp of the cold-rolled steel sheet d.

The present invention has been made in order to eliminate such inconvenience, and an object of the present invention is to provide a warp adjusting device for a cold temper rolling mill, which can easily adjust vertical warp of a cold rolled steel sheet. To do.

[0007]

In order to achieve such an object, a warpage adjusting device for a cold temper rolling mill according to a first aspect of the present invention comprises a work roll and a bridle roll arranged on the exit side of the work roll. Between the two, there are provided two warp adjustment auxiliary rolls that are provided apart from each other in the traveling direction of the cold-rolled steel sheet, and each warp adjustment auxiliary roll is individually moved up and down to assist each warp adjustment. In a warp adjusting device of a cold temper rolling mill adapted to adjust the warp of the cold rolled steel sheet wound around a roll, the traveling direction of the cold rolled steel sheet is changed between two warp adjusting auxiliary rolls. A fixed deflector roll is provided, and each warp adjusting auxiliary roll and each deflector roll are alternately arranged in a staggered manner on the upper and lower surfaces of the cold-rolled steel sheet along the traveling direction of the cold-rolled steel sheet. And

According to a second aspect of the present invention, there is provided a warp adjusting device for a cold temper rolling mill, wherein a horizontal distance between centers of the warp adjusting auxiliary roll on the work roll side and the deflector roll on the work roll side is L ₂ , When the horizontal distance between the centers of the warp adjusting auxiliary roll on the bridle roll side and the bridle roll side is L ₄ , and the roll diameter of the warp adjusting auxiliary roll is D, 1.5 ≦ L
It is characterized in that the relations of ₂ / D ≦ 3 and 1.5 ≦ L ₄ / D ≦ 3 are satisfied.

According to a third aspect of the present invention, there is provided a warp adjusting device for a cold temper rolling mill, wherein the center-to-center horizontal distance between the work roll and the warp adjusting auxiliary roll on the work roll side is L ₁ , the bridle roll and the When the horizontal distance between the center of the bridle roll side and the warp adjusting auxiliary roll is L ₅ , and the roll diameter of the warp adjusting auxiliary roll is D, L ₁ / D ≧
3 and L ₅ / D ≧ 3 are satisfied.

[0010]

According to the invention of claim 1, two deflector rolls are fixedly provided between the two warp adjusting auxiliary rolls,
Also, by alternately staggering the rolls on the upper and lower surfaces of the cold-rolled steel sheet along the traveling direction of the cold-rolled steel sheet, the work roll side or bridle roll side warp adjustment auxiliary rolls are moved up and down to move one of the inter rolls. Even if you change the mesh
The wrap angle of the cold-rolled steel sheet of the other warp adjusting auxiliary roll is not changed so that the intermesh can be independently changed by each warp adjusting auxiliary roll.

According to the invention of claim 2, in addition to the invention of claim 1, the work roll is satisfied by satisfying the relations of 1.5 ≦ L ₂ / D ≦ 3 and 1.5 ≦ L ₄ / D ≦ 3. The distance between the warp adjusting auxiliary roll and the deflector roll on the side and the distance between the warp adjusting auxiliary roll and the deflector roll on the bridle roll side are proper. That is, when L ₂ / D (L ₄ / D) is less than 1.5, the distance between the warp adjusting auxiliary roll and the deflector roll is too narrow, and an elevating device for raising and lowering the warp adjusting auxiliary roll is attached to the warp adjusting auxiliary roll. Becomes difficult, while L ₂ / D (L ₄
/ D) is more than 3, the interval between the warp adjusting auxiliary roll and the deflector roll is too wide, and the elevating stroke of the elevating device when elevating each warp adjusting auxiliary roll to obtain a predetermined intermesh increases. As a result, a large lifting device is required, which causes a rise in equipment costs.

According to the invention of claim 3, in addition to the invention of claim 1 or 2, by satisfying the relationship of L ₁ / D ≧ 3, the work rolls periodically replaced and the warp of the work roll side Reduces the amount of one-sided warp (difference between the L-warp on the operation side and the L-warp on the drive side of the warp adjustment auxiliary roll) and twist caused by misalignment of orthogonality and parallelism with the adjustment auxiliary roll Then, the warp adjusting work by the warp adjusting auxiliary roll is more easily performed. Also, L ₅ / D
By satisfying the relation of ≧ 3, one-sided warp or twist of the cold-rolled steel sheet caused by misalignment of orthogonality and horizontality between the bridle roll and the warp adjusting auxiliary roll on the side of the bridle roll due to the installation accuracy of the bridle roll The amount of the warp is reduced to more easily perform the warp adjustment work by the warp adjustment auxiliary roll.

In other words, when L ₁ / D is less than 3, the gap between the work roll and the warp adjusting auxiliary roll on the side of the work roll is too small, and the effect of the misalignment becomes large, and as a result, the cold rolled steel sheet. The amount of unilateral warp and twist increases, which makes it difficult to adjust the warp by the warp adjusting auxiliary roll. If L ₅ / D is less than 3, the gap between the bridle roll and the warp adjusting auxiliary roll on the bridle roll side is too narrow, and the effect of the misalignment becomes large.
Similarly, the amount of one-sided warp or twist of the cold-rolled steel sheet increases, which makes it difficult to adjust the warp by the warp adjusting auxiliary roll.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic side view of a cold temper rolling mill equipped with a warpage adjusting device according to an embodiment of the present invention, and FIG. 2 shows the relationship between the amount of one-sided warpage σ and L ₁ / D, L ₅ / D. FIG. 3 is a graph showing the relationship between L ₂ / D, L ₄ / D and L ₁ / D, L ₅ / D.

As shown in FIG. 1, the cold temper rolling mill 1
The tin plate 3 unwound from the coil of the pay-off reel 2 was passed through the tension roll 2a and then moved to No. 1 stand 4 and No. 1 2 cold rolled by the stand 5, and then vertical warp (L warp, of the cold rolled steel plate 3a (cold rolled steel plate)
(C warpage) 2 Adjust the warp adjusting device 7 provided on the exit side of the work roll 6 of the stand 5 and wind up the tin plate 3a whose warp is adjusted by the tension reel (not shown) via the bridle roll 8. It is configured. In FIG. 1, reference numerals 9 and 10 are backup rolls. As the mill driving method, a work roll driving method or a backup roll method is appropriately selected.

Next, the warp adjusting device 7 which is the gist of the present invention
Will be described. The warp adjusting device 7 is No. Two warp adjusting auxiliary rolls 11 and 12 are provided between the work roll 6 and the bridle roll 8 of the two stands 5 and are rotatably provided apart from each other in the traveling direction of the tin plate 3a. Both the warp adjusting auxiliary rolls 11 and 12 can be raised and lowered. In this embodiment, the warp adjusting auxiliary roll 11 on the work roll 6 side is provided on the lower surface side of the original plate 3a, and the warp adjusting auxiliary roll 12 on the bridle roll 8 side.
The tin plate 3a is wound around by arranging them in a staggered manner on the upper surface side of the tin plate 3a. Elevating devices (not shown) such as electric or hydraulic drives are attached to the warp adjusting auxiliary rolls 11 and 12, respectively, so that the warp adjusting auxiliary rolls 11 and 12 can be individually moved up and down by driving of the elevating devices. It has become. Then, the inter-mesh of each of the warp adjusting auxiliary rolls 11 and 12 is changed by the ascending / descending to adjust the L warp and the C warp vertical warp of the tin plate 3a.

Between the respective warp adjusting auxiliary rolls 11 and 12, two deflector rolls 13 and 14 for changing the traveling direction of the tin plate 3a are provided separately from each other in the traveling direction of the tin plate 3a. ing. Each of the deflector rolls 13 and 14 is fixedly provided and its vertical movement is restricted. Further, in the present embodiment, the roll diameters of the deflector rolls 13 and 14 are made larger than the roll diameters of the warp adjusting auxiliary rolls 11 and 12 in order to ensure rigidity and the like. The deflector roll 13 on the work roll 6 side has the contact top with the tin plate 3a located on the upper surface of the tin plate 3a below that of the warp adjusting auxiliary roll 11, while the deflector roll 8 on the bridle roll 8 side. 14 The tin plate 3a is provided on the lower surface of the tin plate 3a.
The apex of the tin plate 3a is wound around the deflector roll 13 and the warp adjusting auxiliary roll 12 with their contact vertices above. As a result, the advancing direction of the tin plate 3a is changed by the deflector rolls 13 and 14, and the warp adjusting auxiliary roll 11, the deflector roll 13, the deflector roll 14 and the warp adjusting auxiliary roll 12 of the tin plate 3a are changed. Zigzag patterns are alternately arranged on the upper and lower surfaces of the tin plate 3a along the traveling direction.

In this way, the two deflector rolls 1 are provided between the two warp adjusting auxiliary rolls 11 and 12.
When the warp adjusting auxiliary rolls 11 and 12 are used to adjust the vertical warp of the tin plate 3a, the warp adjusting auxiliary rolls 11 and the warp adjusting auxiliary rolls 12 are moved up and down by fixing and fixing the warp adjusting auxiliary rolls 11 and 12. Even if one of the intermesh is changed, the tin plate 3a for the other warp adjusting auxiliary roll 12 or the warp adjusting auxiliary roll 11 is changed.
The wrapping angle of is not changed. As a result, the inter-mesh change by the warp adjustment auxiliary rolls 11 and 12 can be independently performed on the work roll 6 side and the bridle roll 8 side, and each warp adjustment auxiliary roll 1
It is possible to easily adjust the upward warp and the downward warp by the numbers 1 and 12.

Here, in this embodiment, each roll 11, 1
3, 14 and 12, the horizontal distance between the centers of the warp adjusting auxiliary roll 11 and the deflector roll 13 is L ₂ , the horizontal distance between the center of the warp adjusting auxiliary roll 12 and the deflector roll 14 is L ₄ , and each warp adjustment is performed. When the roll diameter of the auxiliary rolls 11 and 12 is D, 1.5 ≦ L ₂ / D ≦ 3, 1.
The rolls are arranged so as to satisfy the relationship of 5 ≦ L ₄ / D ≦ 3, and the intervals between the rolls 11, 13, 14, 12 are made proper.

That is, when L ₂ / D is less than 1.5, when the above-described lifting device is attached to the warp adjusting auxiliary roll 11, the warp adjusting auxiliary roll 11 and the deflector roll 13 are too close to each other, and thus the attachment is difficult. Difficult, while L
_{When 2} / D exceeds 3, the distance between the warp adjusting auxiliary roll 11 and the deflector roll 13 is too wide, and the lifting stroke of the elevating device when elevating the warp adjusting auxiliary roll 11 to obtain a predetermined intermesh increases. As a result, a large lifting device is required, resulting in a high equipment cost.

Similarly, when L ₄ / D is less than 1.5, the warp adjusting auxiliary roll 12 and the deflector roll 14 when the above-mentioned lifting device is attached to the warp adjusting auxiliary roll 12 are mounted.
Is too close to make the installation difficult, while
If L ₄ / D exceeds 3, the distance between the warp adjusting auxiliary roll 12 and the deflector roll 14 is too wide, and the elevating device lifts when the warp adjusting auxiliary roll 12 is moved up and down to obtain a predetermined intermesh. As a result, a large lifting device is required, resulting in an increase in equipment cost. Therefore, in this way, 1.5 ≦ L ₂ / D ≦ 3,
By arranging the rolls 11, 13, 14 and 12 so as to satisfy the relationship of 1.5 ≦ L ₄ / D ≦ 3, it is easy to attach the lifting device to each of the warp adjusting auxiliary rolls 11 and 12. In addition, it is possible to obtain a predetermined intermesh with a small elevating device, and the equipment cost can be kept low.

By the way, No. The work rolls 6 of the two stands 5 are regularly replaced, but in this case, due to misalignment of orthogonality and parallelism between the work rolls 6 and the warp adjustment auxiliary rolls 11 due to the mounting accuracy at the time of replacement. The tin plate 3a is warped or twisted.
On the other hand, due to the misalignment of the orthogonality and the parallelism between the bridle roll 8 and the warp adjusting auxiliary roll 12 due to the installation accuracy of the bridle roll 8, the tin plate 3a is also warped or twisted.

Therefore, if the space between the work roll 6 and the warp adjusting auxiliary roll 11 and the space between the bridle roll 8 and the warp adjusting auxiliary roll 12 are too narrow, the effect of the above-mentioned misalignment increases and the misalignment occurs. As a result, the amount of one-sided warp or twist of the tin plate 3a on the warp adjustment auxiliary roll 11 side and the warp adjustment auxiliary roll 12 side increases. Therefore, even if the intermesh can be independently changed by the warp adjusting auxiliary rolls 11 and 12 as described above, the respective warp adjusting auxiliary rolls 11 and 12 are increased due to the increase in the amount of the one-sided warp or twist. It becomes difficult to adjust the vertical warp of the tin plate 3a by 12.

Therefore, in this embodiment, the horizontal distance between the centers of the work roll 6 and the warp adjusting auxiliary roll 11 is L ₁ ,
When the horizontal distance between the centers of the bridle roll 8 and the warp adjusting auxiliary roll 12 is L ₅ , and the roll diameter of the warp adjusting auxiliary roll is D, the relationship of L ₁ / D ≧ 3, L ₅ / D ≧ 3 is obtained. Effects of misalignment on the work roll 6 side and the bridle roll 8 side are set by setting the distance between the work roll 6 and the warp adjustment auxiliary roll 11 and the distance between the bridle roll 8 and the warp adjustment auxiliary roll 12 so as to be satisfied. Is as low as possible.

More specifically, FIG. 2 shows experimental data obtained by the inventors of the present invention. The variation σ (standard deviation) of the amount of one-sided warp generated on the tin plate 3a is plotted on the vertical axis, and L ₁ / D and L ₅ are plotted. 6 is a graph showing the relationship between the two when the value of / D is plotted on the horizontal axis. Here, the roll diameter D of each of the warp adjusting auxiliary rolls 11 and 12 is 165 m, which is most common in a temper rolling mill that processes a tin plate 3a having a plate thickness of 0.15 to 0.60 mm.
m, 209 mm, and 200 mm were used.

As is apparent from FIG. 2, L ₁ / D, L ₅
When the value of / D is less than 3 (L ₁ / D, L ₅ / D <3), the work roll 6 and the warp adjusting auxiliary roll 11 are not affected by any type of warp adjusting auxiliary rolls 11 and 12. And the distance between the bridle roll 8 and the warp adjusting auxiliary roll 12 are too narrow, and the influence of misalignment becomes large, and the variation σ of the amount of one-sided warp exceeds 3 mm.

On the other hand, when the values of L ₁ / D and L ₅ / D are 3 or more (L ₁ / D, L ₅ / D ≧ 3), when any type of warp adjusting auxiliary rolls 11 and 12 is used Also, the distance between the work roll 6 and the warp adjustment auxiliary roll 11 and the distance between the bridle roll 8 and the warp adjustment auxiliary roll 12 are proper, and the influence of misalignment is reduced, and the variation σ of one-sided warp amount is 2 mm. Was less than. Therefore, the work roll 6 and the warp adjusting auxiliary roll 1 are formed so as to satisfy the relationship of L ₁ / D ≧ 3 and L ₅ / D ≧ 3.
When the vertical warpage of the tin plate 3a is adjusted by the respective warp adjustment auxiliary rolls 11 and 12 by setting the distance between the warp adjustment auxiliary roll 12 and the bridle roll 8 and the warp adjustment auxiliary roll 12, The influence of the above is reduced, and the vertical warp adjustment of the tin plate 3a by the warp adjustment auxiliary rolls 11 and 12 can be more easily performed.

In FIG. 3, the values of L ₂ / D and L ₄ / D are plotted on the vertical axis, and the values of L ₁ / D and L ₅ / D are plotted on the horizontal axis.
L ₂ ≦ 3D, 1.5D ≦ L ₄ ≦ 3D, L ₁ ≧ 3D, L ₅
6 is a graph in which a range satisfying the relationship of ≧ 3D is shown by hatching, and the hatched portion shows an application range of the present embodiment. By the way, in this embodiment, the roll diameters of the warp adjusting auxiliary rolls 11 and 12 are 200 mm and the deflector rolls 13 and 14 are 300 mm, and L ₁ = 800 mm and L ₂ = 5.
00 mm, L ₃ (horizontal distance between centers of deflector roll 13 and deflector roll 14) = 350 mm, L ₄
= 400 mm and L ₅ = 2600 mm.

[0029]

As is apparent from the above description, according to the first aspect of the invention, since the intermesh can be changed independently by the two warp adjusting auxiliary rolls, each warp adjusting roll can be adjusted. The effect that the vertical warp of the cold-rolled steel sheet can be easily adjusted by the auxiliary roll is obtained.

According to the invention of claim 2, in addition to the invention of claim 1, by satisfying the relationships of 1.5 ≦ L ₂ / D ≦ 3 and 1.5 ≦ L ₄ / D ≦ 3, each warp It is possible to easily attach the lifting device to the auxiliary roll for adjustment, and it is possible to obtain a predetermined intermesh with a small lifting device, and it is possible to reduce the equipment cost. .

According to the invention of claim 3, in addition to the invention of claim 1 or 2, by satisfying the relationship of L ₁ / D ≧ 3, L ₅ / D ≧ 3, each of the warp adjusting auxiliary rolls cools down. When adjusting the vertical warp of the rolled steel sheet, reduce the influence of misalignment caused by the work roll and bridle roll mounting accuracy, etc., and more easily adjust the vertical warp of the cold rolled steel sheet by each warp adjustment auxiliary roll. The effect that can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a schematic side view of a cold temper rolling mill equipped with a warpage adjusting device according to an embodiment of the present invention.

[Fig. 2] Variation σ of one-sided warp generated in the tin plate
6 is a graph showing the relationship between (standard deviation) on the vertical axis and the values of L ₁ / D and L ₅ / D on the horizontal axis.

FIG. 3 shows the values of L ₂ / D and L ₄ / D on the vertical axis and L ₁ / D and L
The value of ₅ / D is plotted on the horizontal axis, and 1.5D ≦ L ₂ ≦ 3D, 1.
6 is a graph in which the range satisfying the relationship of 5D ≦ L ₄ ≦ 3D, L ₁ ≧ 3D, L ₅ ≧ 3D is shown by hatching.

FIG. 4 is an explanatory side view for explaining a warp adjusting device of a conventional cold temper rolling mill.

[Explanation of symbols]

 1 ... Cold temper rolling mill 3a ... Tin plate (cold rolled steel plate) 6 ... Work roll 7 ... Warp adjusting device 8 ... Bridle roll 11, 12 ... Warp adjusting auxiliary roll 13, 14 ... Deflector roll

Claims (3)

[Claims] 1. Two auxiliary rolls for adjusting warpage, which are provided between a work roll and a bridle roll arranged on the exit side of the work roll and are spaced apart from each other in the traveling direction of the cold-rolled steel sheet, and which can be moved up and down. A warp adjusting device for a cold tempered rolling mill, wherein the warp adjusting auxiliary rolls are individually moved up and down to adjust the warp of the cold-rolled steel sheet wound around the warp adjusting auxiliary rolls. Two deflector rolls for changing the traveling direction of the cold-rolled steel sheet are fixedly provided between the warp adjustment auxiliary rolls, and each warp adjustment auxiliary roll and each deflector roll are provided in the cold-rolled steel sheet. A warp adjusting device for a cold temper rolling mill, characterized in that staggered arrangements are alternately provided on the upper and lower surfaces of the cold rolled steel sheet along the traveling direction. 2. A center-to-center horizontal distance between the warp adjusting auxiliary roll on the work roll side and the deflector roll on the work roll side is L ₂ , the warp adjusting auxiliary roll on the bridle roll side and the bridle roll. When the horizontal distance between the center of the deflector roll and the deflector roll is L ₄ , and the roll diameter of each warp adjusting auxiliary roll is D, 1.5
_{≦ L 2 /D≦3,1.5≦L 4 / D ≦} 3 relationship, characterized by satisfying the claims 1 warp adjusting apparatus as cold temper rolling machine according. 3. The horizontal distance between the centers of the work roll and the warp adjusting auxiliary roll on the work roll side is L ₁ ,
When the horizontal distance between the centers of the bridle roll and the warp adjusting auxiliary roll on the bridle roll side is L ₅ , and the roll diameter of each warp adjusting auxiliary roll is D, L ₁ / D
3. The warpage adjusting device for a cold temper rolling mill according to claim 1, wherein the relationship of ≧ 3 and L ₅ / D ≧ 3 is satisfied.