KR20060077423A - Apparatus for polishing hearth roll - Google Patents

Abstract

The present invention relates to a polishing apparatus for annealing rolls, comprising: a polishing roll disposed between an up annealing roll and a down annealing roll in an annealing furnace to polish an annealing roll, wherein the polishing roll has a cooling water flow in which cooling water flows. A main pipe on which an additional portion is formed; A suction pipe disposed on an outer surface of the main pipe and having a plurality of dust suction holes formed therein; An abrasive stone surrounding the main pipe and the suction pipe so that the dust suction port is exposed to the outside; It is characterized in that the dust pipe consisting of a dust pipe that is connected to the discharge pipe is possible, because it can be easily polished in the annealing furnace without drawing the annealing roll out of the annealing furnace, so that the surface of the annealing roll is easy to manage The surface quality of the annealing strip can be obtained, and the effect of minimizing the production of the product due to the annealing roll grinding or exchange can be minimized.

Dust Inlet, Dust Pipe, Grinding Stone, Main Pipe, Coolant

Description

Apparatus for polishing hearth roll}             

1 is a cutaway perspective view of an annealing furnace in which a conventional annealing roll is shown;

2 is a cutaway perspective view of an annealing furnace in which a polishing roll is mounted between the annealing rolls according to the present invention;

3 is a perspective view of a partially cut polishing roll of the polishing apparatus according to the present invention;

Figure 4 is a side cross-sectional view of the configuration of the abrasive roll dust intake in accordance with the present invention.

5 is a cross-sectional view showing the main body of the polishing roll according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10: polishing roll

11: main pipe

11a: inner pipe

12: abrasive stone

20: dust pipe

22: dust intake

23: suction pipe

24: partition                 

25: connection piping

30: up-down motor

31: up-down screw

32: drive motor

34: bearing block

35-a, 35-b: Sensor

40: coolant rotary joint

41: cooling water inlet

42: cooling water outlet

100: annealing furnace

The present invention relates to a polishing apparatus for annealing rolls for supporting continuous annealing of strips in a continuous annealing furnace. More particularly, the annealing roll has a surface formed by a high temperature inside the annealing furnace and a scale formed on the surface of the strip. The annealing roll polishing apparatus which can grind | cure the annealing roll which hardened | cured or which is progressing uneven wear on the surface by the friction of a strip | bridging inside an annealing furnace.

In general, a hearth roll is provided inside the continuous annealing furnace to support the advancing strip. That is, referring to FIG. 1, a strip (not shown) for annealing is supported by annealing rolls 110-a and 110-b while passing through the inside of a high temperature annealing furnace. The annealing rolls (110-a, 110-b) is moved up and down the inside of the annealing furnace through a chain 114 driven by a hoisting motor 113 installed on the upper part of the annealing furnace. Reference numeral 111 is an annealing roll driving motor, 112 is a universal joint connecting the drive motor and the annealing roll, 120a and 120b is a hearth roll sensor.

Annealing rolls (110-a, 110-b) is the surface of the annealing roll (110-a, 110-b), such as the surface is hardened or uneven wear progresses due to the surface friction between the high temperature atmosphere of the annealing furnace and the advancing strip, etc. In the event of a defect, the surface quality of the advancing strip is degraded. At this time, in order to remove the surface defects of the annealing roll (110-a, 110-b), the surface after drawing the annealing roll (110-a, 110-b) from the annealing furnace through the roll gate 115 conventionally Polished.

That is, when the surface of the up annealing roll 110-a supporting the strip running inside the annealing furnace is hardened and a flaw occurs in the surface of the strip, the surface of the up annealing roll 110-a supporting the strip is polished. In order to up the down annealing roll (110-b) to be used to support the strip, and instead of the up annealing roll (110-a) supporting the strip down. Thereafter, the annealing furnace is extinguished or the annealing furnace temperature is minimized to open the roll gate 115 in a state in which the flame inside the annealing furnace does not come out, and the surface is hardened to remove the annealing roll 110-a and polish the surface. It was.

Therefore, in order to produce a strip having good surface quality in a continuous annealing furnace, at least one of the two annealing rolls 110-a and 110-b in pairs must always maintain the best roll surface. However, the conventional method is difficult to manage the annealing rolls (110-a, 110-b) due to the above problems, it is difficult to obtain a good strip surface quality.

In detail, since the annealing roll having the surface defects is involved in the transfer of the strip in the annealing furnace, there is no way to take a prompt action even if the surface of the annealing roll has a great influence on the strip quality.

The present invention has been proposed to solve the conventional problems as described above, it is necessary to position the polishing roll having an outer surface made of abrasive stone between the up annealing roll and the down annealing roll in the annealing furnace and to polish the annealing roll. It is an object of the present invention to provide a polishing apparatus for annealing rolls capable of maintaining the surface of the annealing rolls by performing the surface grinding work on the annealing rolls when there is.

In addition, an object of the present invention is to provide a polishing apparatus for the annealing roll that can absorb the dust generated when performing the surface polishing operation on the annealing roll inside the annealing furnace into the polishing roll and discharged to the outside of the annealing furnace. There is a purpose.

In order to achieve the above object, according to the present invention, the polishing apparatus of the annealing roll includes a polishing roll which is installed between the up annealing roll and the down annealing roll in the annealing furnace to polish the annealing roll, the polishing roll is A main pipe having a coolant flow portion through which coolant flows; A suction pipe disposed on an outer surface of the main pipe and having a plurality of dust suction holes formed therein; An abrasive stone surrounding the main pipe and the suction pipe so that the dust suction port is exposed to the outside; Characterized in that the dust pipe consisting of a dust pipe that is connected to the dust discharge to the suction pipe.

It is preferable that a small diameter inner pipe is installed inside the main pipe to allow the cooling water to flow.

Preferably, the dust pipe portion and the cooling water flow portion are divided by partitions installed in the main pipe.

Preferably, the polishing apparatus of the annealing roll further comprises a drive unit for rotating the polishing roll.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of the grinding | polishing apparatus of the annealing roll which concerns on this invention with reference to an accompanying drawing is demonstrated.

First, referring to FIG. 2, annealing rolls 110-a and 110-b are installed inside the annealing furnace to support a traveling strip. The polishing apparatus according to the present invention includes a polishing roll 10 installed between the up annealing roll 110-a and the down annealing roll 110-b in the annealing furnace to polish the annealing roll.

As shown in FIGS. 3 to 5, the polishing roll 10 includes a main pipe 11 having a cooling water flow passages 13-a and 13-b through which cooling water flows, and a main pipe ( 11, the suction pipe 23 disposed on the outer surface and having a plurality of dust suction ports 22 formed therein, and the abrasive stone 12 surrounding the main pipe 11 and the suction pipe 23 so that the dust suction ports 23 are exposed to the outside. ) And a dust pipe portion 20 which is connected to the suction pipe 23 to enable dust discharge.

The coolant flow passages 13-a and 13-b are divided by a small diameter inner pipe 11 a installed inside the main pipe 11. One end of the inner pipe 11a is connected to the cooling water inlet 41 of the main pipe 11 which is connected to the cooling water supply unit (not shown) to enable the cooling water flow, and the other end of the inner pipe 11a is the main pipe ( It is opened inside 11a). Accordingly, the coolant supplied from the coolant supply part flows along the flow passage 13-a inside the inner pipe 11a as indicated by the arrow A via the coolant inlet 41 of the main pipe 11. Later, it flows into the main pipe 11 through the open end of the inner pipe 11a.

Thereafter, the cooling water introduced into the main pipe 11 passes through the flow passage 13-b along the direction of the arrow B, and then passes through the cooling water outlet 42 provided at one end of the main pipe 11. Is discharged through. By the flow of such cooling water, the polishing roll 10 inside the annealing furnace is cooled.

On the other hand, a partition 24 is provided for closing the other side of the main pipe 12 adjacent to the open end of the inner pipe 11a. By the partition 24, the inside of the main pipe 12 is divided into a cooling water flow part and the dust piping part 20 demonstrated below.                     

The dust pipe 20 is connected to the dust collecting facility (not shown) through the connection pipe 25 to enable the discharge of dust. Reference numeral 21 is a rotary joint for maintaining the dust pipe 20 and the connection pipe 25 is connected while the polishing roll 10 is rotated. Both ends of the polishing roll 10 are rotatably supported by a bearing block, and one end of the polishing roll 10 is connected to the driving motor 32 through the driving chain 33.

The lower part of the bearing block is provided with an up-down motor 30, which is connected to the lower surface of the bearing block through an up-down screw 31. The updown screw 31 is changed in length by the operation of the updown motor 30. Therefore, the polishing roll 10 is rotated by the drive motor 32 and is moved up and down by the up-down motor 30. Reference numerals 35-a and 35-b are detection sensors for detecting a lifting operation of the polishing roll 10 by driving the up-down motor 30.

On the other hand, the suction pipe 23 is provided on the outer surface of the main pipe 11 along its longitudinal direction, and the suction pipe 23 is provided with a plurality of dust suction ports 22. One end of the suction pipe 23 is closed while the other end is open, and the open end of the suction pipe 23 is an outer surface of the dust pipe 20, in particular the dust pipe 20 adjacent to the partition 24. The outer surface of the dust is connected to the possible communication. Therefore, dust generated while polishing the annealing rolls 110-a and 110-b by the polishing roll 10 flows into the suction pipe 23 through the dust suction port 22 and then follows the arrow C direction. It is introduced into the dust collecting pipe 20. Thereafter, it is discharged to the dust collecting equipment via the connecting pipe 25.

The abrasive stone 12 is a part for polishing the surfaces of the annealing rolls 110-a and 110-b, and constitutes an outer surface of the polishing roll 10. At this time, the protruding end of the dust collecting suction port 22 is exposed through the abrasive stone 12. This is for effectively inhaling dust generated during grinding of the annealing roll.

Hereinafter, the operation of the polishing apparatus of the annealing roll according to the present invention will be described.

The annealing rolls 110-a and 110-b and the polishing roll 10 are driven to be connected to the universal joint 112 so that the annealing rolls 110-a and 110-b are not bent at a high temperature inside the annealing furnace 100. It is always driven by the motor 111, and the polishing roll 10 is always driven by the polishing roll drive motor 32 and the drive chain 33.

Cooling water rotary joint 40 is assembled on one side to prevent bending of the polishing roll 10. The center of the cooling water rotary joint 40 is a coolant inlet 41 into which coolant enters and a coolant outlet 42 into which the coolant comes out. The coolant entering through the coolant inlet 41 enters the partition 24 through the coolant inner passage 13-a inside the polishing roll and exits through the coolant outer passage 13-b to cool the polishing roll 10. After exiting through the cooling water outlet 42.

In order to grind the surface of the annealing roll, the annealing roll which needs to be polished is down by the annealing roll up-down motor 113 connected with the annealing roll and the chain 114 until the annealing roll down detection sensor 120-b is detected. The polishing roll 10 connected to the polishing roll drive motor 32 and the drive chain 33 and constantly driven by the annealing roll driven by the annealing roll driving motor 111 connected to the joint 112 is driven down the driving polishing roll. Operating the polishing roll up-down motor 30 connected with the screw 31 up to raise the bearing block 34 assembled with the polishing roll up-down screw 31 to reach the current set in the polishing roll drive motor 32. Thus, the operation of the polishing roll up-down motor 30 is automatically stopped.

The up operation of the polishing roll up-down motor 30 is automatically performed whenever the annealing roll is polished and the contact coefficient between the polishing roll 10 and the annealing roll decreases so that the current of the polishing roll driving motor 32 falls short of the set value. Although it is made of a grinding roll pull-up detection sensor (35-a) is no longer up operation.

When the polishing roll 10 starts to rise out of the polishing roll pull-down sensor 35-b, the dust collecting equipment is operated, and the polishing roll 10 rises and comes into contact with the annealing roll so that the polishing stones 10 12) begins to grind the surface of the annealing roll, the dust generated at this time is the cooling water passage (13-a, 13-) to the partition 24 through the dust suction port 22 and the suction pipe 23 formed at regular intervals on the surface of the polishing roll. The dust is collected in the dust collecting pipe 20 separated from b) and the collected dust is collected in the dust collecting facility through a connection pipe 25 connected to the dust collecting rotary joint 21.

When the polishing is completed, the polishing roll 10 is operated to the down state until it is detected by the polishing roll pull-down detection sensor 35-b.

In this way, the surface of the annealing roll in use can be always maintained in the best condition in a short time.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. It should be recognized.

According to the present invention, since the annealing roll can be easily polished in the annealing furnace without drawing the annealing roll out of the annealing furnace for the purpose of polishing the annealing roll, it is easy to manage the annealing roll surface, thereby obtaining a high quality annealing strip surface quality. Therefore, there is an effect that can minimize the production failure due to the grinding or replacement of the annealing roll.

Claims (4)

A polishing roll installed between the up annealing roll and the down annealing roll in the annealing furnace to polish the annealing roll, The polishing roll includes a main pipe having a cooling water flow portion through which cooling water flows; A suction pipe disposed on an outer surface of the main pipe and having a plurality of dust suction holes formed therein; An abrasive stone surrounding the main pipe and the suction pipe so that the dust suction port is exposed to the outside; An apparatus for grinding an annealing roll, characterized in that the dust pipe portion is connected to the suction pipe to enable dust discharge. The method of claim 1, The inside of the main pipe is a grinding apparatus for the annealing roll, characterized in that the inner pipe of the small diameter is installed so that the cooling water can flow. The method of claim 1, And the dust pipe and the coolant flow part are divided by a partition installed inside the main pipe. The method of claim 1, An apparatus for polishing an annealing roll, further comprising a driving unit for rotating the polishing roll.

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