KR100825304B1 - Hot rolling mill - Google Patents

Abstract

The present invention relates to a hot rolling mill including a movable side guide device and a defective strip bar extracting device capable of preventing bending of the strip bar at the same time as the defective strip bar drawing operation in the hot rolling process.

In order to achieve this, the present invention is a movable side guide device that can be moved back and forth along the sliding base 31 installed on the side of the Al Oti 4 of the hot rolling mill and can be moved up and down by the vertical cylinder (35), It provides a hot rolling mill including a defective strip bar extracting device made of a roller-type pass table 20 installed to have a certain inclination by mounting the cylinder 21 on one lower side.

The present invention having the configuration as described above can prevent the strip bar 3 from interfering with the bearing block 7 on the Alti 4 and bend the surface of the Alti O roller 5 when a bad strip is generated. There is an effect that can be quickly pulled out on the stacking table 40 without generating any defect.

Hot Rolling Mill, Removable Side Guide, Bad Strip Pullout, Al Oti

Description

Hot Rolling Mill {HOT ROLLING MILL}

1 is a diagram illustrating the occurrence of bending of a strip bar in a conventional hot rolling mill;

Figure 2 is an illustration of a defective strip bar drawing operation in the conventional hot rolling mill,

3 is an exemplary view showing a state in which a bad strip bar is stacked on a loading table in a conventional hot rolling mill;

4 is a perspective view illustrating an installation state of a hot rolling mill including a defective strip bar extracting device and a movable side guide device according to the present invention;

5 is a perspective view of a defective strip bar drawing device according to the present invention,

6 is an exploded perspective view of a defective strip bar extraction apparatus according to the present invention;

7 is a perspective view of a removable side guide device according to the present invention,

8 is an exploded perspective view of a movable side guide device according to the present invention;

9 is a perspective view of a defective strip bar loading table according to the present invention,

10 is a perspective view of an operation state of a movable side guide device according to the present invention;

11 is an exemplary view of a defective strip bar drawing operation according to the present invention.

Explanation of symbols on the main parts of the drawings

1: finishing mill 2: rough mill

3: strip bar 4: run out table                 

20: passtable 21: cylinder

22: drawing out roller 23: slider joint

24: housing 25: connecting rod

26: moving plate 27: cylinder

28: connecting pin 30: removable side guide

31: sliding base 32: support frame

33: horizontal cylinder 34: roller

35: vertical cylinder 40: loading table

41: enemy ship 42: Cloud Roller

The present invention relates to a hot rolling mill including a movable side guide device and a defective strip bar extracting device in a hot rolling process. More specifically, the present invention relates to a movable strip that can be moved back and forth to prevent bending of the strip bar at the same time as drawing out a defective strip bar. It relates to a hot rolling mill including a side strip device and a defective strip bar take-out device composed of a roller-type pass table having a cylinder mounted on one side of the lower side.

In general, the hot rolling process is to charge the slab (slab) produced by continuous casting or rolling of the steel in a heating furnace to reheat to 1150 ~ 1250 ℃ and then to adjust the width in the rough mill and the thickness in the finishing mill Through this rolling process, the defective strip bars are pulled out from the Al Oti phase.

Here, the run out table refers to a section consisting of a plurality of feed rollers between the roughing mill and the finishing mill, and a bearing block for driving the rollers is installed at the side.

1 is a diagram illustrating the occurrence of warpage of strip bars in a conventional hot rolling mill, and FIG. 2 is a view illustrating a draw strip stripping operation in a conventional hot rolling mill, and FIG. 3 is a state in which a bad strip bar is mounted on a loading table in a conventional hot rolling mill. It is an illustration.

In the prior art, as shown in FIGS. 1 to 3, a strip bar is provided on a drive side that is one side of an run out table 4 installed between the rough mill 2 and the finishing mill 1 in the hot rolling facility. Fixed side guides (6) are provided to prevent the bending of 3), but the side guides could not be installed on the work side for taking out the defective strip bar (15).

Therefore, the strip bar 3 is frequently bent toward the work side and interferes with the bearing block 7 so as to be bent or the strip bar 3 rushes over the loading table 9 so that worker safety accidents and equipment accidents around the loading table 9 are caused. The risk was great.

In addition, the scratches on the surface of the Al Oty roller 5 caused by the defective strip bar generated in the process of forcibly pulling the defective strip bar 15 over the loading table 9 by using the cobble 8 on the AlOTI 4 are Thereafter, there is a problem of causing secondary surface defects of the strip bar 3 to be rolled.

 In order to solve the above problems, the present invention provides a bearing block by using a hot rolling mill including a movable strip guide device capable of moving forward and backward and a defective strip bar drawing device including a roller-type pass table to which direction change and lifting functions are applied. It prevents the bending of strip bar caused by interference with the strip, and when removing the defective strip bar on Alti, it can quickly take out the strip strip without any damage on the surface of the Al Oti roller. It is an object of the present invention to provide a hot rolling mill including a movable side guide and a strip stripping device which can improve the rolling productivity in the manufacturing process by reducing secondary defects as well as preventing large equipment accidents.

In order to achieve the above object, the present invention is installed between the Al Otyro roller on the Al Oti installed between the finishing mill and the rough mill, respectively, and the cylinder capable of lifting and lowering on one side to have a certain inclination to pull out the defective strip bar. And a corresponding pass table hingedly coupled thereto; A plurality of draw-out rollers arranged laterally on the pass table; A slider joint, which is a connection means with the pass table, to allow the draw roller to be turned in a 90 ° direction; A moving plate coupled to the housing side of each of the slider joints so as to be rotatable, and each connecting rod rotatably coupled thereto; A cylinder fixed to an upper portion of the pass table so as to be able to move forward and backward of the movable plate and connected to a lower roll of the movable plate; And a bad strip bar extracting device, characterized in that a plurality of long hatchs are arranged side by side to allow the bad strips to be stacked on the side of the Alotti, and comprising a loading table consisting of a plurality of rolling rollers.

In addition, a movable side guide having a long barrier shape and a plurality of semi-circular grooves are formed in the lower portion to prevent bending of the strip bar on the Al Oti between the finishing mill and the rough mill and installed on one side of the Al Oti; A pair of sliding bases installed to be inclined downward along the side of the bad strip loading table from an upper portion of the bearing block provided at the side of the Alti; A support frame installed at an upper portion of the sliding base and equipped with a roller at a lower portion thereof; A pair of horizontal cylinders installed at an upper portion of the sliding base to enable forward and backward movement of the support frame and connected to the support frame by connecting rods; It provides a hot rolling mill comprising a movable side guide device comprising a pair of vertical cylinders installed on both sides of the support frame to enable the movable side guides to move up and down and fixedly connected to the movable side guides.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view of an installation state of a hot rolling mill including a defective strip bar extracting apparatus and a movable side guide apparatus according to the present invention, FIG. 5 is a perspective view of a defective strip bar extracting apparatus according to the present invention, and FIG. 6 is a defect according to the present invention. An exploded perspective view of a strip bar takeout device.

7 is a perspective view of a movable side guide device according to the present invention and Figure 8 is an exploded perspective view of the movable side guide device according to the present invention.                     

9 is a perspective view of a defective strip bar loading table according to the present invention.

According to FIG. 4, the hot rolling mill according to the present invention is composed of a finishing mill, a rough rolling mill, and an AlOTi as in the prior art.

The defective strip bar extracting apparatus according to the present invention has a pass table (B) between the Al Oti roller (5) on the Al Oti (4) between the finishing mill (1) and the rough rolling mill (2) as shown in Figs. 20) are installed respectively. The workside end of the passtable 20 is hinged by a connecting pin 28 and a piston 21 is mounted on the lower side of the passtable 20 to raise and lower one side of the passtable 20 to achieve a constant inclination.

The reason why one side of the pass table 20 is elevated to achieve a constant inclination angle is to cause the bad strip to slide on the stacking table 40 by the inclination of the pass table 20 when a bad strip bar is generated.

Conventionally, in the process of forcibly pushing by the rack pinion gear type cobble 8 to draw out a defective strip, the surface of the Al Oti roller 5 is caused to scratch. However, the present invention provides the Al Oti roller 5 when the defective strip slips. A plurality of draw rollers 22 arranged in the lateral direction were installed on the upper part of the pass table 20 so as not to cause scratches on the surface.

In addition, in order to facilitate the process of moving the strip bar (3) from the roughing mill (2) to the finishing mill (1), each draw roller 22 on the pass table (20) can be turned 90 ° After the slider joint 23 is coupled to the lower part of the take-out roller 22 and the connection rods 25 respectively connected to the sides of the housing 24 of the slider joint 23 are flow-fixed to one moving plate 26. As the movable plate 26 moves forward and backward, a cylinder 27 is installed at the lower portion of the movable plate 26 so that the take-out roller 22 can be changed in direction.

As shown in FIG. 9, the stacking table 40 has a plurality of long bar-shaped stackers 41 on the upper surface of the stacking table 40 so that the strip bars can move on the stacking table 40 even when a plurality of defective strip bars occur. Is installed side by side and the rolling roller 42 was installed on the top of the loading rack (41).

In the movable side guide device according to the present invention, as shown in FIGS. 5 to 6, the defective strip loading table 40 is directed from the top of the Al Oti bearing block 7 between the finishing mill 1 and the rough rolling mill 2. Sliding base 31 is installed to be inclined downward.

The reason for the downward inclination is that the movable sidebar 30 must pass over the bearing block 7 on the side of the Alti 4 and be seated and fixed to the inside of the bearing block 7. This is because it can prevent bending due to interference with (7).

A horizontal cylinder 33 is fixedly installed on an upper surface of the sliding base 31, and a support frame 32 of a movable side guide is connected to an end of the fixed cylinder 33 by a connecting rod.

The lower portion of the support frame 32 is equipped with a roller 34 so as to be able to move back and forth by the operation of the cylinder, and a guide rail 36 is installed to prevent derailment of the roller 34.

In addition, a pair of vertical cylinders 35 are mounted on both sides of the support frame 32 so that the movable side guides 30 can be moved up and down, and the movable side guides 30 are mounted on the vertical cylinders 35. It is fixedly connected.

The movable side guide 30 has a long barrier shape and a semi-circular groove is machined at each position corresponding to the rolling roller 42 of the defective strip bar holder 41 at the bottom thereof.

The reason why a plurality of semi-circular grooves are machined in the lower portion of the movable side guide 30 is to prevent interference with the rolling roller 42 of the defective strip bar loading zone 41 in the forward and backward process of the movable side guide 30. to be.

The present invention made up of such a configuration has the following operational relationship.

In normal operation, as shown in FIG. 10, the horizontal cylinder 33 mounted on the sliding base 31 is advanced to move the support frame 32 up to the bearing block 7 and then to the support frame 32. The movable side guide 30 is lowered by the vertical cylinder 35 mounted on the side of and is seated on the side of the AOTI roller 5.

Therefore, the strip bar (3) moving past the roughing mill (2) is guided along the movable side guide (30), so that the strip bar (3) interferes with the bearing block (7) and bends or rushes around the loading table (40). It can prevent safety accidents that occur.

In addition, the pass table 20 having the withdrawal roller 22 attached to the upper portion according to the present invention improves the flowability of the strip bar 3 on the AlOTI 4.

11 is an exemplary view of a defective strip bar drawing operation according to the present invention.

If a bad strip is generated, the movable side guide 30 is raised by the vertical cylinder 35 mounted to the side of the support frame 32, and then the upper portion of the sliding base 31 is shown in FIG. The mounted horizontal cylinder 33 operates to move the movable side guide 30 fixed to the support frame 32 to the inside of the loading table 40.

Subsequently, the movable plate 26 is moved backward by the cylinder 27 mounted on the upper part of the pass table 20 so as to load the take-out roller 22 coupled to the housing 24 of the slider joint 23. 90 degrees in the direction of (), and one side of the pass table is lifted by the vertical cylinder 35 mounted on one side lower portion of the pass table 20 so that the pass table 20 has a constant inclination to be inclined downward in the loading table direction.

Therefore, the defective strip bar is moved onto the loading table 40 without friction by the pull-out roller 22 on the upper part of the pass table 20. At this time, the rolling roller 42 is also mounted on the loading table 41 upper portion of the loading table 40 so that the defective strip bar may be placed on the loading table 40 without scratching.

The hot rolling mill according to the present invention can prevent the strip bar from bending by interfering with the bearing block on the AlOTy by the above-described configuration and action, and in the case of a defective strip, without causing any defect on the surface of the AlOTI roller at all. Can be withdrawn onto the loading table.

Therefore, it reduces the secondary defects of the strip bar due to the defect of the Al Oti roller and minimizes downtime, thereby improving rolling productivity and preventing rolling failure and safety accidents caused by the strip bar being bent toward the work side. have.

Claims (4)

It is installed between each of the Al Oti rollers (5) on the Al Oti (4) installed between the finishing mill (1) and the rough mill (2), and lowered on one side lower side to have a constant inclination to pull out the defective strip bar (15) Passable cylinder 21 is mounted and the other side is hinged coupled to the pass table (20); A plurality of take-out rollers 22 arranged laterally arranged on an upper portion of the pass table 20; It characterized in that it comprises a defect strip bar take-out device consisting of a loading table 40 consisting of a plurality of elongated loading racks (41) arranged side by side so as to be able to load the defect strip 15 on the side of the AOTI (4) Hot rolling mill. 2. The pass table (20) according to claim 1, further comprising: a pull-out roller (22) connected by a slider joint (23) to enable a 90 degree turn; A moving plate (26) coupled to the housing (24) side of each of the slider joints (23) by means of a connecting rod and mounted with a roller (29) at the bottom thereof; Hot rolling mill, characterized in that the cylinder 27 is fixed to the upper portion of the pass table (20) connected to the lower roller (29) of the moving plate (26) to enable forward and backward movement of the moving plate (26). The hot rolling mill according to claim 1, wherein the stacking table (40) is additionally provided with a plurality of rolling rollers (42) on top of the loading rack (41) to enable smooth movement of the defective strip. 4. The hot rolling mill according to any one of claims 1 to 3, wherein the hot mill has a strip bar (3) interfering with the bearing block (7) on the Alti (4) between the finishing mill (1) and the rough mill (2). A movable side guide 30 having a long barrier shape to prevent bending and having a plurality of semi-circular grooves formed at a lower portion thereof and installed at one side of the ALOTI 4; A pair of sliding bases 31 installed to be inclined downward along the side of the defective strip loading table 40 from an upper portion of the bearing block 7 provided at the side of the AOTI 4; A support frame 32 installed above the sliding base 31 and having a roller 34 mounted on the bottom thereof; A pair of horizontal cylinders 33 installed at an upper portion of the sliding base 31 so as to be able to move forward and backward of the support frame 32 and connected to the support frame 32 by a connecting rod; It includes a movable side guide device which is installed on both sides of the support frame 32 so that the movable side guide 30 can be raised and lowered and composed of a pair of vertical cylinders 35 to which the movable side guide 30 is fixedly connected. Hot rolling mill, characterized in that.

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