JP5074286B2 - Roll device and method of using the same - Google Patents

Description

The present invention relates to a roll apparatus including a group of rolls arranged on the entry / exit side of a slab reduction device of a continuous casting facility and a driving mechanism thereof, and a method of using the roll apparatus.

An internal defect exists in the center part of the slab cast by the continuous casting facility. For this reason, the quality of the center part of a slab is improved by installing the slab reduction apparatus which reduces a slab in the upstream part of a slab cutting device, and pressing down a slab.

A group of rolls for conveying the slab is arranged on the entry side and the exit side of the slab reduction device, respectively. When driving the front roll group arranged on the entry side and the rear roll group arranged on the exit side, a driving device is installed in each of the front roll group and the rear roll group and driven by a total of two drive devices ( There are two types, for example, refer to Patent Document 1) and a method in which the front roll group and the rear roll group are linked and driven by a single driving device.

Japanese Utility Model Publication No.59-114214

During slab reduction by the slab reduction device, the slab extends in the casting direction, so the slab movement speed differs between the entrance side and the exit side of the slab reduction device. When the driving device is installed in each group, the speeds of the front roll group and the rear roll group can be individually controlled. Therefore, it is possible to cope by changing the speeds of the front and rear roll groups. However, since the driving devices are installed in the front roll group and the rear roll group, respectively, equipment costs such as a mechanical driving device and an electric control device are required.

On the other hand, when the front roll group and the rear roll group are interlocked and driven by a single driving device, a speed difference is generated between the rear roll group and the slab. As a result, abnormal wear of the roll or excessive stress acts on the chain or sprocket that transmits the driving force to cause abnormal wear or damage.

The present invention has been made in view of such circumstances, and the front roll group and the rear roll group can be stably driven by a single drive device, and the equipment cost of the drive device can be greatly reduced. An object of the present invention is to provide a roll apparatus and a method for using the roll apparatus.

In order to achieve the above object, a roll device according to a first aspect of the present invention includes a plurality of rear rolls arranged on the exit side of a slab reduction device provided upstream of a slab cutting machine of a continuous casting facility, One of the plurality of front rolls arranged on the inlet side of the slab reduction device and one of the rotation shafts of the plurality of rear rolls as a first drive shaft and connected to one end of the first drive shaft And a second drive shaft connected to the other end of the first drive shaft via a clutch, and an endless chain is hung between sprockets respectively mounted on the rotation shaft of the rear roll. It is characterized in that an endless chain is stretched between sprockets that are respectively mounted on the rotary shaft of the front roll and the second drive shaft.

A roll device according to a second aspect of the present invention includes a plurality of rear rolls arranged on the exit side of a slab reduction device provided upstream of a slab cutting machine of a continuous casting facility, and the slab reduction device of the slab reduction device. A plurality of front rolls arranged on the entry side; a first connecting shaft connected to each rotary shaft via a gear box provided at one end of each rotary shaft of the plurality of rear rolls; A second connecting shaft connected to each rotating shaft through a gear box provided at one end of each rotating shaft of the front roll, and the first connecting shaft and the second connecting shaft are connected and disconnected. It is characterized by comprising a clutch to be connected, and one drive device connected to one end of the drive shaft, with one of the rotation shafts of the plurality of rear rolls as a drive shaft.

Moreover, 3rd invention is a usage method of the roll apparatus which concerns on 1st and 2nd invention, Comprising: While not operating the said slab reduction device, the said clutch is connected, At the time of the said slab reduction device operation | movement The clutch is disconnected.

Moreover, in the usage method of the roll apparatus which concerns on 3rd invention, it is suitable to drive the said back roll at the same speed as the moving speed of slab.

In the roll device according to the first invention and the method of using the same according to the third invention, the second drive shaft for driving the front roll group on the first drive shaft of one drive device for driving the rear roll group Can be connected via a clutch, so that the slab moving speed is the same on the entry / exit side of the slab reduction device. When the slab reduction device is not in operation, the clutch is connected and the rear roll group and the front roll are connected. The group is driven by a single drive unit, and the moving speed of the slab is different on the inlet / outlet side of the slab reduction device. When the slab reduction device is in operation, the clutch is disconnected and only the rear roll group moves. Can be driven at the same speed.

Even when the front roll group and the drive unit are disconnected when the slab reduction device is in operation, the front roll group rotates due to the contact frictional resistance with the slab, so slippage occurs between the front roll group and the slab. Without excessive stress on the endless chain or sprocket. Moreover, since the rear roll group is driven at the same speed as the moving speed of the slab, no slip occurs between the rear roll group and the slab.
Therefore, abnormal wear and breakage of the front and rear rolls, the endless chain and the sprocket can be prevented.

In the roll device according to the second invention and the method for using the third invention, the second connecting shaft for driving the front roll group is connected to the first connecting shaft for driving the rear roll group via the clutch. When the slab reduction device is not in operation, the clutch is connected and the rear roll group and the front roll group are driven by a single drive device. When the slab reduction device is in operation, the clutch is disconnected and Only the roll group can be driven at the same speed as the moving speed of the slab.

In the roll device according to the present invention and the method of using the roll device, the drive mechanism of the front roll group is connected to one drive device that drives the rear roll group via a clutch. The clutch is connected and the rear roll group and the front roll group are driven by one drive unit. When the slab reduction device is in operation, the clutch is disconnected and only the rear roll group is driven at the same speed as the slab moving speed. Therefore, abnormal wear and breakage of the front and rear rolls and the driving force transmission mechanism can be prevented. As a result, the equipment cost of the drive device can be greatly reduced.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

[First Embodiment]
FIG. 1 shows a partial longitudinal sectional view of a curved continuous casting equipment 10 provided with a roll device 20 according to a first embodiment of the present invention.
The continuous casting equipment 10 is composed of a ladle (not shown), a tundish 11, a mold 13, a secondary cooling zone 14, a drawing straightening device 15, a slab reducing device 17, a slab cutting machine (not shown), and the like. Yes.

Molten steel in the tundish 11 flows into the mold 13 through the immersion nozzle 12 installed at the bottom of the tundish 11. The mold 13 is always water-cooled, and the molten steel that has flowed into the mold 13 comes into contact with the mold 13 and is rapidly cooled to form a thin solidified shell made of fine granular crystals. The slab 16 that has exited the mold 13 while containing the unsolidified molten steel is further cooled by passing through the secondary cooling zone 14 and the drawing straightening device 15. And in the slab reduction device 17, after improving the quality by preventing the internal defect of the slab 16, it is cut into a predetermined length by the slab cutting machine.

2 and 3 are a plan view and a side view of the slab reducing device 17 and the roll device 20, respectively. In the following description, when the roll device 20 is viewed from the upstream side in the conveyance direction of the slab 16, the right side is referred to as “right” and the left side is referred to as “left” for convenience.

The slab squeezing device 17 has an upper pressure lowering roll 22 and a lower pressure lowering roll 23 that are horizontally arranged in a direction orthogonal to the slab conveying direction X in the housing 21. ), And the slab 16 disposed on the lower pressure reduction roll 23 can be reduced.

A plurality of rear rolls 18 are arranged on the exit side of the slab reduction device 17 and a plurality of front rolls 19 are arranged horizontally at predetermined intervals along the conveyance direction X of the slab, respectively. The rotary shafts 28 and 29 of the rear roll 18 and the front roll 19 are set in a direction orthogonal to the slab conveying direction X, and are rotatably supported by a pair of bearings 33.

The rotary shaft 28 of the rear roll 18 closest to the slab reducing device 17 is a first drive shaft 25, and a drive device 24 is connected to the left end of the first drive shaft 25.
A second drive shaft 27 is connected to the right end portion of the first drive shaft 25 via a clutch 26.

Sprockets 31 are respectively mounted on the right side of the rotation shaft 28 of the rear roll 18 including the first drive shaft 25, and the endless chain 32 is spanned between the sprockets 31 of the rotation shaft 28 of the adjacent rear roll 18. Has been.
A sprocket 31 is also mounted on the right side of the second drive shaft 27 and the rotation shaft 29 of the front roll 19, respectively, and the rotation shaft 30 provided at the lower part of the housing 21 of the slab reduction device 17 is mounted on the rotation shaft 30. Between the sprocket 31 of the second drive shaft 27 and the sprocket 31 of the rotary shaft 29 of the front roll 19 adjacent thereto, and between the sprocket 31 of the rotary shaft 29 of the adjacent front roll 19 via the sprocket 31 formed Further, an endless chain 32 is stretched over.

The clutch 26 transmits or receives the rotational force of the first drive shaft 25 to the second drive shaft 27 by connecting or disconnecting the first drive shaft 25 and the second drive shaft 27. It is a device for stopping, and either a friction clutch or an electromagnetic clutch may be used.

When the drive device 24 is operated with the clutch 26 connected, the rotational force of the drive device 24 is transmitted from the first drive shaft 25 to the rotary shaft 28 of the rear roll 18 via the endless chain 32 and It is transmitted from the second drive shaft 27 to the rotary shaft 29 of the front roll 19 via the endless chain 32.
On the other hand, when the drive device 24 is operated with the clutch 26 disconnected, the rotational force of the drive device 24 is transmitted from the first drive shaft 25 only to the rotary shaft 28 of the rear roll 18 via the endless chain 32. Is done.

Next, the usage method of the roll apparatus 20 which has the said structure is demonstrated.
(1) When the slab reducing device 17 is not in operation, the clutch 26 is connected, and the plurality of rear rolls 18 and the plurality of front rolls 19 are driven by the driving device 24 to convey the slab 16.
(2) When the slab reduction device 17 is operated, only the plurality of rear rolls 18 are driven at the same speed as the moving speed of the slab 16 after being reduced by the slab reduction device 17 with the clutch 26 disconnected.

Since the slab reducing device 17 and the plurality of front rolls 19 and rear rolls 18 according to the present invention are provided upstream of a slab cutting machine (not shown), the slab 16 is a continuous body. For this reason, even if the plurality of front rolls 19 are not driven, the slab 16 is pushed out by the driving rolls such as the secondary cooling zone 14 and the drawing straightening device 15 which are the pre-stage equipment of the plurality of front rolls 19, The slab 16 can be transported because it is pulled out by the slab squeezing device 17, which is the subsequent equipment of the roll 19.

Since the plurality of front rolls 19 rotate with contact frictional resistance with the slab 16, no slip occurs between the front roll 19 and the slab 16, and excessive stress is applied to the endless chain 32 and the sprocket 31. There is no effect. Further, since the plurality of rear rolls 18 are driven at the same speed as the moving speed of the slab 16, no slip occurs between the plurality of rear rolls 18 and the slab 16.

[Second Embodiment]
In FIG. 4, the top view of the roll apparatus 40 which concerns on the 2nd Embodiment of this invention is shown. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the roll device 40 according to the present embodiment, each rotary shaft 28 is connected to the first connecting shaft 43 via a gear box 42 installed at the right end portion of the rotary shaft 28 of the plurality of rear rolls 18. At the same time, each rotary shaft 29 is connected to the second connecting shaft 45 through a gear box 42 installed at the right end of the rotary shaft 29 of the plurality of front rolls 19. The first connecting shaft 43 and the second connecting shaft 45 are rotatably supported by bearings 46, respectively, and a clutch 44 is interposed between the first connecting shaft 43 and the second connecting shaft 45. ing. The second connecting shaft 45 may be a single shaft penetrating the plurality of gear boxes 42 or may be configured by a plurality of shafts connected by the gear box 42.

The rotation shaft 28 of the rear roll 18 closest to the slab reduction device 17 is a drive shaft 41, and the drive device 24 is connected to the left end portion of the drive shaft 41.
When the driving device 24 is operated with the clutch 44 connected, the rotational force of the driving device 24 is transmitted from the driving shaft 41 to the rotating shaft 28 of the rear roll 18 via the first connecting shaft 43, and It is transmitted to the rotating shaft 29 of the front roll 19 through the second connecting shaft 45.
On the other hand, when the drive device 24 is operated with the clutch 44 disconnected, the rotational force of the drive device 24 is transmitted from the drive shaft 41 only to the rotary shaft 28 of the rear roll 18 via the first connecting shaft 43. Is done.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations described in the above-described embodiments, and is considered within the scope of the matters described in the claims. Other embodiments and modifications are also included.

It is a fragmentary longitudinal cross-sectional view of the curved type continuous casting installation provided with the roll apparatus which concerns on the 1st Embodiment of this invention. It is a top view of the roll apparatus and a slab reduction apparatus. Is a side view thereof. It is a top view of the roll apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

10: continuous casting equipment, 11: tundish, 12: immersion nozzle, 13: mold, 14: secondary cooling zone, 15: drawing straightening device, 16: cast slab, 17: cast slab reduction device, 18: rear roll, 19: front roll, 20: roll device, 21: housing, 22: upper pressure lower roll, 23: lower pressure lower roll, 24: drive device, 25: first drive shaft, 26: clutch, 27: second drive shaft , 28, 29, 30: rotating shaft, 31: sprocket, 32: endless chain, 33: bearing, 40: roll device, 41: drive shaft, 42: gear box, 43: first connecting shaft, 44: clutch, 45: Second connecting shaft, 46: Bearing

Claims (4)

A plurality of rear rolls arranged on the exit side of the slab reduction device provided upstream of the slab cutting machine of the continuous casting facility, a plurality of front rolls arranged on the entry side of the slab reduction device, and One of the rotation shafts of the plurality of rear rolls is used as a first drive shaft, one drive device connected to one end of the first drive shaft, and a clutch on the other end of the first drive shaft. A second drive shaft connected via
An endless chain is spanned between the sprockets respectively looped around the rotation shaft of the rear roll, and an endless chain is spanned between the sprockets ringed around the rotation shaft of the front roll and the second drive shaft. A roll apparatus characterized by being made. A plurality of rear rolls arranged on the exit side of the slab reduction device provided upstream of the slab cutting machine of the continuous casting facility, a plurality of front rolls arranged on the entry side of the slab reduction device, and A first connecting shaft connected to each rotating shaft through a gear box provided at one end of each rotating shaft of the plurality of rear rolls, and one end of each rotating shaft of the plurality of front rolls. A second connecting shaft connected to each rotary shaft via a gear box, a clutch for connecting and disconnecting the first connecting shaft and the second connecting shaft, and a plurality of rear rolls One of the rotating shafts is a drive shaft, and the roll device includes one drive device connected to one end of the drive shaft. It is the usage method of the roll apparatus of any one of Claim 1 and 2, Comprising:
A method of using a roll device, wherein the clutch is connected when the slab reducing device is not operated, and the clutch is disconnected when the slab reducing device is operated. 4. The method of using a roll device according to claim 3, wherein the rear roll is driven at the same speed as the moving speed of the slab.

Images