JPS6264408A - Method and apparatus for special rolling of metallic sheet - Google Patents

Abstract

PURPOSE:To efficiently and stably roll a metallic sheet in the stage of rolling the metallic sheet with a differential circumferential speed special rolling installation by setting inlet and outlet side tension in such a manner that the sheet speed on the inlet and outlet side of a rolling mill is made equal to the circumferential speed of the driving rolls on the inlet and outlet side. CONSTITUTION:A strip 20 which is un-wound is successively wound on the respective circumferential surfaces of a contact roll 17, floating roll 19 and contact roll 18 of a rolling mill 11 of a rolling installation 10 and is then coiled. The rolling mill 11 drives the rolls 17, 18 in the same direction and at the circumferential speed of the former lower than the circumferential speed of the former lower than the circumferential speed of the latter so as to exert the inlet and outlet side tension to the strip 20, thereby rolling the strip in the gap between each of the rolls 17, 18 and the roll 19. An arithmetic controller 23 detects the circumferential speeds V1, V2 of the rolls 17, 18 from the results of the measurement by tachometers 21, 22 provided to the rolls 17, 18 and similarly detects the strip speeds V3, V4 of deflector rolls 14, 15. The controller 23 controls the strip tension on the inlet and outlet sides so as to attain V1=V3, V2=V4.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a special rolling method and apparatus for metal plates.

[Prior Art] Conventionally, a different circumferential speed special rolling system 19 is disclosed in, for example, US Pat. No. 7,753,238,756. F, U & CB
S (Contact-Bend-Stretch) rolling equipment has been proposed.

”; As shown in Figure 2, the circumferential speed rolling equipment has large PM
In addition to disposing the driving contact roll 1.2, a non-driven stagnation/flying plate with a diameter slightly larger than the gap and sufficiently smaller than both contact rolls 1.2 is placed near the gap between the two contact rolls 1.2. The roll 3 is placed, the strip 4 is passed through as shown in Fig. 2, and an input tension of 1' l and an output tension of T2 are applied to the strip 4. The circumferential speed of the output side - 1) is lower than the circumferential speed of the tact roll 2 (high speed side).
KE・ζ Driving rotating, non-driving floating roll:
3,'+,! 4 contact rolls 1, 2. It is possible to roll the roller 4 at any gap between the contact rolls 1 and 2. 5 is an unwinding machine, and 6 is a winding machine.

According to the peripheral speed special rolling 1 described in 1, it is necessary to use a floating roll 3 with a relatively small diameter, and if the difference is ≧F! 1, the rolling load and rolling torque are small compared to normal two-high rolling, four-high rolling, and PV rolling as shown in Japanese Patent Publication IV (No. 50-10825). ,
This makes it possible to efficiently roll ultra-thin metal plates.

1 shot 1! The problem that li tries to solve] [1, or I7
However, when manufacturing a metal plate using the above-mentioned different circumferential speed rolling equipment, it is difficult to set the input tension Tl and the output tension T2, and if the tension is too small, the plate thickness will be The metal plate is not rolled to a thickness corresponding to (side roll circumferential speed/inlet roll circumferential speed), and the metal plate slips on the input or output rolls, causing a problem in which stable rolling cannot be performed.

Moreover, when the tension is too large, problems such as breakage of the metal plate have occurred.

An object of the present invention is to enable efficient and stable rolling of a metal plate.

[Means for Solving the Problems] The special method for rolling a metal plate according to the present invention is such that two or more drive rolls are arranged with a gap in between, and a roll is placed in the vicinity of the gap -h from the gap. In a special rolling method for metal plates, which uses a rolling mill equipped with large non-driven floating rolls and rolling the metal plate in the gap between both driven rolls and the floating roll, Measure the board bed, set the board tension on the entry side so that the peripheral speed of the entry side drive roll and the board bed on the entry side are equal, and set the tension on the board so that the peripheral speed of one of the exit side drive rolls and the board speed on the exit side are equal. The plate tension is set.

The special rolling machine for metal sheets according to the present invention has two or more drive rolls arranged with a gap in between, and a non-uniform floating roll that is slightly larger than the spread in the vicinity of the gap F, In a special rolling machine for metal plates that uses a rolling mill that rolls a metal plate in the gap between both driving rolls and a floating roll,
A first stage for detecting the circumferential speed of the inlet drive roll and the circumferential velocity of the outlet drive roll of the rolling mill; Set the plate tension on the entry side so that the circumferential speed and the plate floor on the entry side are equal,
And control "F"l, which sets the plate tension on the outlet side so that the circumferential speed of the outlet drive roll and the outlet plate speed are equal to hyaluronic acid. : t
: It was made as follows.

r effect 1 (According to the invention, the metal By rolling the plate, it is possible to reduce the rolling load and roll the metal plate efficiently.In addition, the tension on the entry side is
By setting the circumferential speed of the inlet drive roll and the inlet plate bed to be equal, and setting the outlet tension to equalize the circumferential speed of the outlet drive roll and the outlet plate speed, slippage of the metal plate can be reduced. It is possible to perform stable rolling without causing any problems.

[Example] FIG. 1 is a schematic diagram showing an example of a rolling equipment 10 to which the present invention is applied. The rolling equipment 10 includes a rolling mill 11 and an unwinding machine 1.
2, it has a winding fi 13, an inlet side deflector roll 14, an outlet side deflector roll 15, and a winding roll 16.

A rolling mill 111±, contacts as two drive rolls, and rolls 17 and 18 are arranged with a gap in between,
A non-driven floating roll 19 having a diameter slightly larger than the roll gap between both contact rolls 17.18 and sufficiently smaller than the diameter of both contact rolls 17.18 is arranged near both contact rolls 17.18. As a result, the strip 20 unrolled from the unwinder 12 disposed on the input side of the rolling mill 1 is wound around the peripheral surface of the input side contact roll 17, and then wound around the peripheral surface of the floating roll 19. Put it on,
Further, after being wound around the circumferential surface of the outlet contact roll 18, it is possible to pass through the first winding roll 16, the outlet deflector roll 15, and then wind it up on the winder 13 disposed on the outlet side. Moreover, the rolled fill is a strip 20
At the same time, both contact rolls 17 and 18 are moved in the same direction, and the peripheral speed of the contact roll 17 on the input side is applied so that the strip 20 advances toward the output side. Both contact rolls 17 and 18 are driven such that V1 is at least slower than the circumferential speed V2 of the contact roll 18 on the exit side,
The strip 20 can be rolled in the gap between each of the two contact rolls 17, 18 and the floating roll 19.

In this rolling equipment 10, each contact roll 17.18 on the entry side and the exit side has a rotation speed meter 21.22.
are attached, the measurement results are transmitted to the arithmetic controller 23, and the circumferential speed Vr1. of each contact roll 17.18 is determined. Vr2 can be detected. In addition, each deflector roll 14 on the entry side and the exit side. ．． Attach a tachometer 24.25 to 15,
The result of the measurement is transmitted to the arithmetic controller 23, and the rolling aII
Plate floor Vsl on the entrance and exit sides of the strip 20 N′,
Vs2 can be detected.

Furthermore, the arithmetic control 'jji23 sets the board tension T1 on the entry side so that the peripheral speed Vrl of the entry side contact roll 17 and the board floor Vsl on the entrance side are equal, and also sets the peripheral speed Vr2 of the exit side contact roll 18 and The plate tension T2 on the outlet side is set so that the plate floor V s2 on the outlet side is equal. Note that the arithmetic controller 23 calculates -1-plate tension T1, T2 for one unwinding machine 12.
, the desired state can be set by controlling the load current of each drive motor 26, 27 of the winder 13.

Note that the board measuring device shown in FIG. 1 is only one example of the present invention, and any other method such as board floor measurement using ultrasonic waves or the like may be used.

FIG. 3 shows the change in the plate floor on the entry and exit sides when the tension on the entry and exit sides in FIG. 1 is changed.

According to FIG. 3(A), when the inlet tension is increased from an outlet tension of 400 kgf, the inlet plate speed decreases, and when it becomes equal to the inlet drive roll circumferential speed, it stabilizes at that speed. When the tension is further increased, the entrance plate bed tries to drop below the peripheral speed of the entrance drive roll, but the tension becomes too high and it breaks.

On the other hand, the exit plate speed is almost unaffected by the tension on the entry side and matches the circumferential speed of the exit drive roll.

Also, according to Fig. 3 (B), when the outlet tension is increased under the inlet tension of 500 kgf, the outlet plate speed increases, matches the circumferential speed of the outlet drive roll, and becomes stable at that speed. .

If the tension is increased further, the plate will break and break.

That is, it can be seen that the following method is suitable for setting the tension in the present invention. First, set the tension on the entry side and exit side to the initial value of low tension, then compare the entrance side plate speed and the peripheral speed of the input side drive roll at that time, and if the input side plate speed is fast, the corresponding input side plate speed Increase the entry tension until it becomes equal to the peripheral speed of the entry drive roll. Further, the exit side plate speed and the peripheral speed of the exit side drive roll are compared, and if the exit side plate speed is low, the exit side tension is increased until the exit side plate speed becomes equal to the peripheral speed of the exit side drive roll. By setting the tension using this method, it is possible to reliably reach a stable rolling state, and moreover, it is possible to obtain an appropriate stable state without applying excessive tension that may lead to plate breakage.

Note that the tension is the value when the plate speed and the peripheral speed of the drive roll are equal (Tia and Toa in Fig. 3 (A) and (B)).
It is advantageous to allow a little more overload because a stable rolling state can be maintained even if tension fluctuations occur.

Hereinafter, the results of implementing a specific example of the present invention will be explained. Ultra-low carbon steel with a plate width of 50 h is 0.15 + m plate thickness.
It was rolled to a thickness of 1 m using the rolling equipment shown in Fig. 1. Figure 4 shows conventional method 1 (both tensions on the exit side are set at a low tension of 10 tons) and conventional method 2 (both tensions on the exit side are set at a low tension of 3.0 tons).
This figure shows the variation in plate thickness when the tension is set using the method of the present invention) and when the tension is set using the method of the present invention.

In conventional method 1, not only is the thickness not reduced to the set thickness of O,l+w+*, but the thickness also fluctuates greatly.

In addition, in conventional method 2, although the plate thickness value is 0.1+us, it changes in the direction of becoming thinner due to tension fluctuations.
If this gets worse, the plate will break. On the other hand, in the method of the present invention, not only the exit side plate thickness is 0 and 11, which are the set thicknesses, but also the variation in plate thickness is reduced.

Note that the present invention is not only applied to the rolling equipment 10 equipped with the rolling mill 11 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 with respect to the curved surface of the contact roll 18 is made smaller. Further, FIG. 5 CB) 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. Further, 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 contact rolls 17 and 18 is minimized in the same rolling mill 11.

FIG. 5(D) shows the first drive roll 31, the second drive roll 32. The third drive rolls 33 are arranged in tandem, the first floating roll 34 is arranged near the gap between the first drive roll 31 and the second drive roll 32, and the first floating roll 34 is arranged near the gap between the second drive roll 32 and the third drive roll 33. FIG. 3 is a schematic diagram showing a rolling method using a different circumferential speed special rolling Ia30 in which a second floating roll 35 is arranged. The strip 20 has a first drive roll 31, a second drive roll 31, a second
It is rolled in the gaps formed between each of the driving rolls 32 and the first floating roll 34, and is rolled in the gaps formed between each of the second driving rolls 32 and third driving 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 driving roll 43 and a lower roll 44 are arranged in tandem, and a floating roll 45 is arranged near the gap between re-driving rolls 42 and 43. The strip 20 is transferred to a redrive roll 42.
43 and the floating roll 45, as well as in the gaps formed between the upper roll 41 and the first drive roll 42, and between the second drive roll 43 and the lower roll 44.

FIG. 5(F) shows the first drive roll 51. Different circumferential speed special rolling in which the second driving roll 52 and the third driving roll 53 are arranged in a triangular shape, and a floating roller 54 is arranged in the center of the gap formed by each of the driving rolls 51 to 53. machine 5
FIG. strip 20
is each of the driving rolls 51 to 53 and the floating roll 5.
It is rolled in the gap formed by 4.

Figure 5 (G) shows the rolling y15 similar to Figure 5 (F) above.
0, the strip 2o is transferred to the 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.

In FIG. 5(H), the first drive roll 61, the second drive roll 62, and the third drive roll 63 are arranged in a triangular shape, and each of the drive rolls 61 to 63 is placed approximately in the center of the gap formed between each other. FIG. 6 is a schematic diagram showing a rolling method using a different peripheral speed special rolling mill 60 in which a first floating roll 64 and a second floating roll 65 are arranged. 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 method and apparatus for rolling a metal plate according to the present invention, it is possible to roll a metal plate efficiently and stably.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing an example of rolling equipment to which the present invention is applied, Fig. 2 is a schematic diagram showing an example of a special rolling mill with different circumferential speeds, and Fig. 3 (A) and CB) show the entry and exit sides. Figure 4 is a diagram showing the influence of side tension on board speed at the entry and exit sides.
) is a schematic diagram showing another example of a special rolling mill with different circumferential speeds. lO... Rolling equipment, 11... Rolling machine, 12... Unwinding machine, 13... Winding machine, 17... Entry side contact roll, 18... Output side contact roll, 19. ...Floating roll, 20...Strip, 21.22.24.
25... Rotation speed meter, 23... Arithmetic controller. Agent Patent Attorney Osamu Shiokawa Figure 3 (A> Figure 3 (8) Time: 1 minute) Figure 5 (A) Figure 5 (81 5th cause (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 slightly larger than the gap is placed near the gap, and a metal plate is placed in the gap between both drive rolls and the floating roll. In a special rolling method for metal plates using a rolling mill, the plate speeds on the entry and exit sides of the rolling mill are measured, and the plate speed on the entry side is adjusted so that the circumferential speed of the entry drive roll and the entry plate speed are equal. A special rolling method for a metal plate, characterized in that the tension is set, and the plate tension on the exit side is set so that the circumferential speed of the delivery side drive roll and the plate speed on the exit side are equal. (2) Two or more drive rolls are arranged with a gap in between, and a non-driven floating roll that is slightly larger than the gap is placed near the gap, and the metal plate is held in the gap between both drive rolls and the floating roll. In a special rolling equipment for metal plates using a rolling mill, there is provided a means for detecting the circumferential speed of an inlet drive roll and an outlet drive roll of the rolling mill; A means for detecting the exit side plate speed, and setting the entrance side plate tension so that the peripheral speed of the input side drive roll and the input side plate speed are equal, and so that the peripheral speed of the exit side drive roll and the exit side plate speed are equal. 1. A special rolling machine for metal plates, comprising: a control means for setting the plate tension on the exit side;