JPH0639955U - Plate passing roll for continuous annealing furnace - Google Patents

Abstract

(57) [Summary] [Purpose] A strip for continuous annealing that prevents meandering and drawing of the strip running in the continuous annealing furnace. [Structure] A large number of gas suction nozzles are provided in a partition wall chamber that evenly divides the hollow roll by the roll contact length of a strip that rotates the hollow roll, and a pair of partition wall chambers that face each other via a roll shaft. A strip passing roll for a continuous annealing furnace, which is provided with suction gas discharge guide holes on the peripheral edge surface smaller than the strip contact length and on the axial center side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roll which is passed through a continuous annealing furnace while preventing the strip from meandering and drawing.

[0002]

[Problems to be solved by conventional techniques and devices]

 The strip travels while rolling around the central portion of a large number of sheet passing rolls provided inside and outside the continuous annealing furnace. However, due to the local defects in shape and the presence of discontinuities such as welds, the strip momentarily disengages from the completely running contact between the strip and the sheet passing roll, and travels while shifting in a direction perpendicular to the predetermined turning path. There was a problem of meandering. The strip that has passed through the continuous annealing furnace while meandering causes slip flaws on the surface of the rolling plate, and when trying to correct the meandering by increasing the tension, a difference in tension is locally generated and a throttling phenomenon occurs. However, there was a problem that reduced the product value, such as the occurrence of.

In order to prevent the occurrence of such a problem, for example, in Japanese Utility Model Laid-Open No. 2-3456, "Transfer roller for meandering correction, in which fluid ejection holes are arranged in a zigzag pattern on the circumferential surface of the body of a hollow roll" Many types of orthodontic rolls have been developed and used, such as Japanese Utility Model Laid-Open No. 2-3457, "A meandering orthodontic roll provided with a fluid ejection hole inclined around the body of a hollow roll and inclined in the axial direction of the roll". Has been done. Since such a roll is a method of constantly rotating the strip while ejecting a fluid, there is a problem that when the tension of the strip changes, the roll instantaneously shifts to the right angle direction to cause strip defects. Furthermore, as disclosed in Japanese Utility Model Laid-Open No. 62-157961, "The inside of a hollow roll having a nozzle formed on its peripheral surface is partitioned by a partition member to form a wall around which the strip is wound. A cooling roll has also been developed, which has a blowout chamber to prevent the nozzle holes from clogging while adsorbing the strip onto the roll.However, the air blowout chamber inevitably causes the strip to move in the direction perpendicular to the roll. It was difficult to obtain sufficient suction force to prevent the strip from meandering and squeezing the room.

[0004]

[Means for Solving the Problems]

 The purpose of the present invention is to provide a threading roll that prevents such problems from occurring and enhances the suction force of the strip, and its gist is the roll contact length of the strip that turns a hollow roll. A partition wall chamber that evenly divides the inside of the hollow roll is provided, and a large number of gas suction nozzles are installed in the pair of partition wall chambers facing each other via the roll axis on the roll peripheral surface that is smaller than the strip contact arc length. It is a continuous rolling furnace sheet rolling roll having suction gas discharge guide holes on the axial center side.

[0005]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings. 1 and 2 show an embodiment of the present invention in a roll axial sectional view (a) and an axial transverse sectional view (b). In the figure, reference numeral 1 is a hollow roll having various shapes such as a flat surface or a convex surface, which is provided at a turning position or a changing position of a strip 2 running in a continuous annealing furnace. Inside the hollow roll 1, partition wall chambers A and B for evenly dividing the inside of the hollow roll by a partition plate 4 by the roll contact length of the roll 1 of the strip 2 rotating around the peripheral surface of the roll 1 are provided. A large number of gas suction nozzles 3 are provided in the pair of compartments A and B facing each other via the roll axis, and the peripheral edge surface of the roll (60 to 120 degrees in FIG. 1, which is smaller than the strip contact arc length, In FIG. 2, 30 to 60 degrees, preferably about half of the strip contact arc length), and a suction gas discharge guide hole is provided on the axial center side, respectively, to form a continuous annealing furnace sheet passing roll. A large number of gas suction nozzles 3 are bored in various shapes such as the entire width (a) of the strip 2, both ends (b) or the center (c), and an antisymmetric system (d) as shown in FIG. ing.

In the present invention, however, the partition walls A and B to be divided are provided so that the suction force of the gas suction nozzle 3 where the strip 2 is wound around the hollow roll 1 is sufficiently exerted. In addition, if a large number of gas suction nozzles 3 are provided on the roll peripheral surface having a strip contact arc length or longer, the gas suction nozzles 3 that are out of the strip winding contact portion will significantly reduce the suction effect of the strip. , It becomes difficult to control the right angle movement of the strip. Therefore, the gas suction nozzle 3 is intended to maintain the suction state for at least 1/3 of the time required for one rotation of the roll, that is, the strip contact arc length or less.

[0007]

[Effect of device]

 The strip passing roll of the present invention as described above is provided at the direction changing or turning position of the traveling strip to stably control the meandering of the strip that occurs during traveling and prevent squeezing. It has the feature of continuing to operate.

[Brief description of drawings]

FIG. 1 is a sectional view in the axial direction of a roll and a sectional view in the axial direction of an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a roll shaft cross-sectional view (left side) of various sheet passing rolls having different gas suction nozzle hole shapes and a gas suction nozzle hole development view (right side) of the roll circumferential surface.

[Explanation of symbols]

 1 Hollow Roll 2 Strip 3 Gas Suction Nozzle 4 Partition Plate

Claims (1)

[Scope of utility model registration request] 1. A partition wall chamber that evenly divides the hollow roll by the roll contact length of a strip that rotates the hollow roll is provided, and a large number of partition wall chambers are provided in a pair opposite to each other via a roll axis. The continuous annealing furnace sheet-rolling roll characterized in that the gas suction nozzle is provided on the roll peripheral surface that is smaller than the strip contact length, and the suction gas discharge guide hole is provided on the axial center side.