JPS62203604A - Method and apparatus for special rolling of metallic sheet - Google Patents

Abstract

PURPOSE:To prevent the necking down rupture of a metallic sheet and to stabilize rolling by rolling the metallic sheet while supplying a lubricating and cooling liquid between roll faces of a non-driven floating roll provided between >=2 pieces of driving rolls and the metallic sheet to be rolled. CONSTITUTION:An auxiliary roll 14 and floating roll 19 are disposed to the driving rolls 17, 18. The cooling liquid is ejected from lubricating and cooling liquid ejection nozzles 21, 22, 23, 24 provided near said roll. Both the front and rear faces of the strip 20 and the roll faces of the rolls 17, 18, 19 are surely lubricated and cooled in the inlet side rolling region and outlet side rolling region of a rolling mill 11 by the effect of the cooling liquid. The generation of the necking down rupture of the metallic sheet is prevented and the stable rolling is executed by the above-mentioned method.

Description

[Detailed Description of the Invention] [Industrial Application Field] Unreleased 1! +1 relates to special rolling methods and equipment for metal sheets.

[Prior art] Conventionally, as a special rolling equipment with different circumferential speeds, for example, U.S. Pat.
CBSC Cor+ta as shown in No. 23875B
ct-bend-3tretch) rolling equipment has been proposed.

As shown in Fig. 2, the different circumferential speed rolling equipment is equipped with large-diameter driving contact rolls I and rolls 1 and 2, and near the gap between the two contact rolls 1.2, a roll with a diameter slightly larger than the gap is installed. A non-driven floating roll 3 having a sufficiently smaller diameter than both contact rolls 1 and 2 is arranged, and the strip 4 is threaded as shown in FIG. T2 is applied, and the peripheral speed of the input side contact roll 1 (low speed side) is driven and rotated so as to be slower than the peripheral speed of the output side contact roll 2 (high speed side), and the non-driven floating roll 3 and The strip 4 can be rolled in the gap between the inner contact roll 1.2 and the inner contact roll 1.2. 5 is an unwinding machine, and 6 is a winding machine.

”2 According to the special rolling equipment for different peripheral speeds, since floating rolls 3 with a relatively small diameter are used and rolling is performed at different peripheral speeds, it can be used for ordinary 2-high rolling, 4-high rolling and
Compared to PV rolling as shown in No.-10825,
The rolling cocoon weight and rolling torque are reduced, making it possible to efficiently roll ultra-thin metal sheets.

[9. Problems to be solved by Ming] However, when manufacturing the strip 4 for a long time using 1.1-speed rolling equipment, the temperature rise of the non-driven floating roll 3 and the entrainment of worn metal powder may occur. As a result, the coefficient of friction within the roll bite between the contact rolls 1 and 2 and the non-driven floating roll 3 increases, and the entrance gap between the contact roll 1 and the non-driven floating roll 3 as shown by 3A in FIG. The tension acting on the strip 4 in the area sandwiched by the exit gap between the contact roll 2 and the non-driven floating roll 3 is reduced. This decrease in tension causes the strip 4 in this region to separate from the non-driven floating roll 3, and furthermore, the buckled portion of the strip 4 that occurs in the radial direction is caught in the exit gap, causing breakage due to so-called squeezing, making rolling impossible. There is a risk of this happening.

In addition, in the different circumferential speed rolling equipment, since the strip 4 is wound around the non-driven floating roll 3, cooling of the floating roll 3 is a problem. Note: Narrowing down is likely to occur.

Further, in the above-mentioned different circumferential speed rolling equipment, the lubricant cooling liquid spouting nozzle for lubricating and cooling the floating roll 3 is installed at the second
As shown by 3B in the figure, it is also conceivable to arrange the strip 4 to face the front surface of the unwound floating roll 3. According to this lubricating coolant jet nozzle 3B, the nozzle 3B
The lubricating cooling liquid supplied from (1) is applied between the strip 4 and the roll surface of the floating roll 3, which is rolled in the entry rolling region formed by the floating roll 3 and the contact roll 1, to the entry rolling region. 12) The exit rolling area formed by the floating roll 3 and the contact roll 2 is introduced relatively easily because the direction in which the lubricating coolant is ejected matches the moving direction of the floating roll 3 and the contact roll 1. Between the strip 4 to be rolled and the roll surface of the floating roll 3,
The direction of the lubricant cooling liquid spouting to the exit rolling area and the floating roll 3
Since the direction of movement of the contact roll 2 and the direction of movement of the contact roll 2 are opposite to each other, it is difficult to introduce it. The floating roll 3 cannot be sufficiently cooled, and an appropriate amount of lubricating cooling liquid cannot be supplied to the exit rolling region around the floating roll 3.

An object of the present invention is to sufficiently cool a floating roll and supply an appropriate amount of lubricating cooling liquid to the exit rolling region around the floating roll, thereby enabling stable rolling of a metal plate.

[Means for Solving the Problems] The special method for rolling a metal plate according to the present invention includes arranging driving rolls north of the second tree with a gap in between, and disposing a non-driving roll in the vicinity of the gap that is larger than the gap. Place a floating roll of
In a special method for rolling a metal plate using a rolling mill that rolls a metal plate in the gap between both drive rolls and a floating roll, the metal plate is rolled in an exit rolling area formed by a floating roll and an exit drive roll; A lubricating cooling liquid is supplied between the floating roll and the roll surface.

The special rolling apparatus for metal sheets according to the present invention includes two or more drive rolls arranged with a gap in between, and a non-driven floating roll larger than the gap arranged in the vicinity of the gap,
In a special rolling machine for metal plates that uses a rolling mill that rolls a metal plate in the gap between both drive rolls and a floating roll, the inlet gap between the inlet drive roll and the floating roll is spaced apart from the floating roll. and an auxiliary roll for winding the metal plate sent out from the auxiliary roll and feeding the metal plate into the exit gap between the exit drive roll and the non-driven floating roll.

A connecting beam that supports the floating roll in a state where rotation is not transmitted and also supports the auxiliary roll in a state where no rotation is transmitted, and a connecting beam that is placed in a space between the floating roll and the auxiliary roll, and is connected to the floating roll and the exit drive roll. A lubricating coolant spouting nozzle for supplying lubricating coolant is provided between the metal plate rolled in the exit rolling area formed by the roll and the roll surface of the floating roll.

[Function] According to the present invention, the lubricating cooling liquid for the exit rolling region formed by the floating roll and the exit drive roll is applied between the metal plate rolled in the exit rolling region and the roll surface of the floating roll. It will be supplied to This ensures that the lubricating coolant is introduced into the exit rolling area around the floating rolls.

As a result, according to the present invention, the floating rolls are sufficiently cooled, and an appropriate amount of lubricating oil is supplied to the exit rolling area around the floating rolls, and the metal plate is squeezed and stably rolled in a state where no breakage occurs. becomes possible.

[Example] FIGS. 1A and 1B are schematic diagrams showing an example of a rolling mill 10 to which the present invention is applied. The rolling equipment 10 has rolling M
al1. It has @outer Jll 2, a-take 4113, auxiliary roll 14, and connection beam 15.

The rolling mill j l has two contact rolls 17.18 as drive rolls arranged with a gap between them, and a roll gap slightly larger than that of the single contact roll 17.18 near both contact rolls 17.18. A non-driven floating roll 19 is arranged, the diameter of which is significantly smaller than the diameter of both contact rolls 17,18.

The auxiliary roll 14 is spaced apart from the non-driven floating roll 19 and is wound with a strip 20 that is fed out from the entry gap (input rolling area) between the entry contact roll 17 and the non-driven floating roll 19. Thereafter, it is possible to feed the strip 20 into the exit nip (exit rolling area) between the exit contact roll 18 and the non-driven floating roll 19.

The connecting beam 15 supports the non-driven floating roll 19 in a state where rotation is not transmitted, and also supports the auxiliary roll 14 in a state where rotation is not transmitted.

As a result, the unwinding machine 12 disposed on the entry side of the rolling mill 11
The strip 20 unwound from
After passing through the circumferential surface of the auxiliary roll 14 and being wound around the circumferential surface of the output side contact roll 18, it is wound up on the winding fi 13 disposed on the output side. Further, the unwinding machine 12 and the winding machine 13 apply an inlet tension Tl and an outlet tension T2 to the strip 20, and the rolling mill 1
1, the contact rolls 17 and 18 are moved in the same direction at 7F so that the strip 20 moves toward the exit side, and the circumferential speed Vl of the contact roll 17 on the entry side is at least as high as that of the contact roll 18 on the exit side. 11 l+I+j contact roll 17 so that it is slower than leap speed v2
．． 18 are driven respectively, and the rolling g n( It is called Noh.

Therefore, this rolling equipment 10 is provided with lubricating coolant jetting nozzles 21, 22, 23, and 24.

The cooling liquid jet nozzle 21 is arranged in front of the floating roll 19 on which the strip 20 is not wound.

The lubricating coolant supplied from the nozzle 21 is applied to the floating roll 1
9 and the contact roll 17 to the input rolling area and the direction of movement of each roll 19, 17 are the same, so that the input pressure kL? It is reliably and easily introduced between the strip 20 rolled in the n-zone and the roll surface of the floating roll 19.

11tl m The coolant jet nozzle 24 starts winding the strip 20 around the inlet contact roll 17/
It is located in area l11. The lubricant cooling liquid supplied from the nozzle 24 is reliably and easily introduced between the roll surface of the contact roll 17 and the strip 20 because its ejecting direction matches the moving direction of the contact roll 17, and then is suspended. The strip 20 is moved to the entry rolling region defined by the roll 19 and the contact roll 17, and is supplied between the 9-round surface of the contact roll 17 and the strip 20 to be rolled in the entry rolling region. Note that the lubricating cooling liquid supplied from the nozzle 24 does not pass through any other rolling area before reaching the entry rolling area, so it is supplied to the entry rolling area without degrading the lubricating cooling performance. reach

The lubricant coolant jet nozzle 22 is used to contact the exit rolling region formed by the floating roll 19 and the contact roll 18.・
It is located between the roll 18 and the strip 20. Since the direction in which the lubricating coolant supplied from the nozzle 22 coincides with the direction in which the rolls 19 and 18 move, the lubricant coolant is ejected from the nozzle 22 in a direction between the strip 20 being rolled in the exit rolling area and the roll surface of the contact roll 18. be introduced reliably and easily.

The n71 slip cooling liquid jetting nozzle 23 is arranged in a space 24 sandwiched between the floating roll 19 and the auxiliary roll 14.

The lubricating coolant supplied from the nozzle 23 is applied to the floating roll 1
This is because the direction in which the lubricating coolant is ejected to the exit rolling region between the contact rolls 9 and the contact rolls 18 coincides with the movement direction of each roll 19 and 18.

The strip 20 is reliably and easily rolled between the strip 20 to be rolled in the exit rolling area and the roll surface of the floating roll 19.

Therefore, in the above-mentioned rolling equipment 1O, by the action of each lubricant cooling liquid spouting nozzle 21, 22, 23, 24, both the front and back surfaces of the strip 20 and each roll in the inlet rolling area and the outlet rolling area of the rolling fill. It is possible to reliably lubricate and cool the roll surfaces of 17, 18, and 19. That is, the floating roll 19 is sufficiently cooled, and the floating roll 1
By supplying an appropriate amount of lubricating coolant to the rolling area from the entry side to the exit side around the strip 9, it is possible to squeeze the strip 20 and stably roll it without causing any breakage.

FIG. 3(A) shows the auxiliary roll 14 of the rolled film #1110.
, a perspective view showing the connecting beam 15 and the floating roll 19, and 25 is a support beam that supports the auxiliary roll 14 and the floating roll 19 freely in the horizontal direction and without vibration in the vertical direction. be.

FIG. 3(B) shows a modification of the connection structure between the auxiliary roll 14 and the floating roll 19. This modification includes a plurality of backup rolls 26 for preventing benzo ink from floating rolls 19, and the backup rolls 26 and the auxiliary roll 14 are connected by a connecting beam 27.

FIG. 4 is a diagram showing the implementation results of the present invention in comparison with the conventional example.
According to the present invention, the coefficient of friction does not increase even when a metal plate is rolled for a long time, and stable rolling is possible.

Note that the present invention is not only applied to the rolling equipment IO equipped with the rolling mill 11 shown in FIG. 1, but also shown in FIG.
It is also widely applicable to rolling equipment equipped with rolling mills shown in each of ) to (H).

FIG. 5(A) shows that in the different circumferential speed special rolling mill 11,
FIG. 3 is a schematic diagram showing a rolling method in which the winding angle of the strip 20 around the circumferential surface of the contact roll 18 is made smaller. Moreover, FIG. 5(B) is a schematic diagram showing a rolling method in which the winding angle of the strip 20 with respect to the circumferential surface of the contact roll 17 is minimized in the same rolling mill 11. Moreover, FIG. 5(C) is a schematic diagram showing a rolling method in which the winding angle of the strip 20 with respect to the circumferential surfaces of both the contact rolls 17 and 18 is made smaller in the same rolling a11.

In FIG. 5(D), a first driving roll 31, a second driving roll 32, and a third driving roll 33 are arranged in tandem, and a first floating roll is placed near the gap between the first driving roll 31 and the second driving roll 32. 34 and a second floating roll 35 near the gap between the second drive roll 32 and the third drive roll 33. FIG. The strip 20 is rolled in gaps formed between each of the first driving roll 31 and the second driving roll 32 and the first floating roll 34, and is rolled in the gaps formed by the second driving roll 32 and the third floating roll 34, respectively.
Rolling is performed in the gap formed between each of the drive rolls 33 and the second floating roll 35.

FIG. 5(E) shows the upper roll 41, the first drive roll 42,
FIG. 4 is a schematic diagram showing a rolling method using a special rolling mill 40 with different circumferential speeds, in which a second drive roll 43 and a lower roll 44 are arranged in tandem, and a floating roll 45 is arranged near the gap between both drive rolls 42 and 43. The strip 20 is carried on one drive roll 42.
43 and the floating roll 45, and the -1- roll 41 and the first driving roll 42
and the gap between the second drive roll 43 and the lower roll 4
The gap between 4 and 4 is extended for a day.

In FIG. 5(F), a first drive roll 51, a second drive roll 52, and a third drive roll 53 are arranged in a triangular shape, and each of the drive rolls 51 to 53 floats in the center of the gap between them. Different circumferential speed special rolling mill 50 with rolls 54 arranged
FIG. The strip 20 is connected to each of the driving rolls 51-53 and the floating roll 54.
It is rolled in the gap formed by the .

FIG. 5(G) shows a rolling mill 50 similar to FIG. 5(F) in L.
, the strip 20 is transferred to a first drive roll 51 . FIG. 6 is a schematic diagram illustrating a rolling method in which rolling is performed in gaps formed between each of the third drive rolls 53 and a floating roll 54.

FIG. 5(H) shows the first drive roll 61. The second driving roll 62 and the third driving roll 63 are arranged in a triangular shape, and the first floating roll 64 and the second floating roll 65 are arranged approximately at the center of the gap formed between each of the driving rolls 61 to 63. FIG. 2 is a schematic diagram showing a rolling method using a special rolling mill 60 with different circumferential speeds. The strip 20 is connected to the first drive roll 61 and the first
A gap between the floating roll 64, a gap between the second driving roll 62 and the first floating roll 64, a gap between the first floating roll 64 and the second floating roll 65, and a third driving roll 63.
and the second floating roll 65.

[Effects of the Invention] As described above, according to the special rolling method and apparatus for metal sheets according to the present invention, the floating rolls are sufficiently cooled and an appropriate amount of lubricating cooling liquid is applied to the exit rolling area around the floating rolls. It is possible to supply the metal sheet, squeeze the metal plate, and stably roll it in a state where no breakage occurs.

[Brief explanation of drawings]

Figures 1 (A) and (B) are schematic diagrams showing an example of rolling equipment to which the present invention is applied, Figure 2 is a schematic diagram showing an example of a special rolling mill with different circumferential speeds, and Figure 3 (A) is a schematic diagram showing an example of rolling equipment to which the present invention is applied. 3(B) is a perspective view showing a modified example of FIG. 3(A); FIG. 4 is a line diagram showing the results of implementing the present invention;
Figures (A) to (H) are schematic percentage formulas showing other examples of different circumferential speed special rolling mills. 13... Winder, 14... Auxiliary roll, 15...
Connecting beam, 17.18... Contact roll, 19
...Floating roll, 20...Strip, 23...
Lubricating coolant jet nozzle. Agent Patent Attorney Osamu Shiokawa Figure 1 (A) Figure 1 (B) Figure 2 Figure 3 (A) Figure 3 CB) Figure 4 Time < 1) Figure 50 (A) Figure 5 ( 8) Article 50(C)

Claims (2)

[Claims] (1) Two or more drive rolls are placed with a gap in between, and a non-driven floating roll that is larger than the gap is placed near the gap, and the metal plate is rolled in the gap between both drive rolls and the floating roll. In a special method for rolling a metal plate using a rolling mill, a lubricating cooling liquid is applied between the metal plate to be rolled in the exit rolling area formed by the floating roll and the exit drive roll and the roll surface of the floating roll. A special rolling method for metal sheets characterized by supplying. (2) Two or more drive rolls are arranged with a gap in between, and a non-driven floating roll larger than the gap is arranged near the gap, and the metal plate is rolled in the gap between both drive rolls and the floating roll. In a special rolling machine for metal plates using a rolling mill, the metal plate is placed at a distance from the floating roll and is fed out from the entry gap between the entry drive roll and the floating roll. An auxiliary roll that feeds the plate into the exit gap between the exit drive roll and the non-driven floating roll, and a connecting beam that supports the floating roll in a state where rotation is not transmitted and also supports the auxiliary roll in a state where rotation is not transmitted. , is placed in the space between the floating roll and the auxiliary roll, and a lubricating cooling liquid is applied between the roll surface of the floating roll and the metal plate to be rolled in the exit rolling area formed by the floating roll and the exit drive roll. 1. A special rolling equipment for metal plates, comprising: a lubricant cooling liquid jetting nozzle for supplying lubricating cooling liquid;