JP4027010B2 - Universal rolling mill top horizontal roll cooling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an upper horizontal roll of a universal rolling mill that facilitates adjustment by changing the roll width and roll height direction of the cooling nozzle according to the size of the upper horizontal roll after replacement when the upper horizontal roll is replaced. The present invention relates to a cooling device.
[0002]
[Prior art]
The universal rolling mill is used for rolling, for example, H-section steel, I-section steel, and invert, and includes an upper and lower horizontal roll that lowers the web from the upper and lower sides, and a vertical roll that lowers the flange from the left and right. The upper and lower horizontal rolls are configured to be movable up and down corresponding to the thickness of the rolled material.
Since the rolling material at the time of rolling is squeezed at a high temperature of 950 to 1050 degrees, for example, the horizontal roll and the heel roll are also heated to raise the temperature. When the temperature rise continues, wear and cracks of the roll occur, and therefore means for preventing the temperature rise by applying cooling water to the roll by a cooling device is taken.
[0003]
For example, a horizontal roll cooling device for a universal rolling mill disclosed in Japanese Utility Model Publication No. 55-92405 has a fixed pipe disposed along the outer peripheral surface of the horizontal roll, and the fixed pipe is provided on the outer peripheral surfaces of both horizontal rolls. A large number of nozzles for cooling the outer peripheral surface of the roll that spray cooling water toward each other are provided, a guide body is disposed along the axis of both horizontal rolls, and guided by the guide bodies to the axis of both horizontal rolls. A roll side surface cooling nozzle that is movable along the roll side surface is provided, and the roll side surface cooling nozzle and the fixed pipe are communicated by a flexible hose.
It is described that such a configuration can appropriately cool the roll side surface even if the roll width is changed.
[0004]
[Problems to be solved by the invention]
However, since the conventional horizontal roll cooling device for a universal rolling mill is movable only in the axial direction, it is necessary to remove the roll side cooling nozzle and the guide body when replacing the horizontal roll by moving it in the axial direction. . And after attaching the roll to set up newly, it was necessary to set it manually according to the roll width.
In addition, since the nozzle for cooling the outer peripheral surface of the roll is provided in a fixed pipe, the nozzle position does not change even if the height of the roll is changed, and it cannot follow the change in the thickness of the rolled material during reduction. It was. Furthermore, adjustment according to the web width could not be performed, and the roll could not be efficiently cooled.
The present invention has been made in view of such circumstances, and can be adjusted in the roll height and roll width direction, can follow the fluctuation of the roll height at the time of rolling down, and is an upper horizontal roll of a universal rolling mill that does not get in the way when replacing the roll. An object is to provide a cooling device.
[0005]
[Means for Solving the Problems]
The upper horizontal roll cooling device for the universal rolling mill according to the present invention that meets the above-mentioned object is provided with a frame provided on a balance beam that moves up and down in synchronization with the upper horizontal roll, and an axial direction of the upper horizontal roll on the frame. A horizontal movement rail provided along the horizontal movement rail, first and second roll width direction position adjusting means provided so as to be able to advance and retreat in opposition to each other, and the first and second rolls. The first and second roll height position adjusting means, which are provided in the width direction position adjusting means and are provided so as to be movable up and down in synchronization with each other, are attached to the first and second roll height position adjusting means. , Provided on at least one of the first and second flange cooling pipes and a plurality of first and second flange cooling pipes provided with a plurality of nozzles each capable of jetting cooling water on both side surfaces of the upper horizontal roll. The horizontal roll above And a web cooling pipe having a plurality of nozzles capable of jetting a cooling water on the peripheral surface, is movable to follow the vertical movement at the time of reduction of the upper horizontal roll.
[0006]
Here, the first and second roll width direction position adjusting means can be configured, for example, by forming a rack in each and engaging each rack with a pinion provided in the center. For example, a hydraulic jack can be used as the first and second roll height position adjusting means.
Since the upper horizontal roll cooling device is provided on the balance beam that moves up and down in synchronization with the upper horizontal roll, it can move following the vertical movement when the upper horizontal roll is reduced, and the position and dimensions of the cooling water can be adjusted. Without change, the upper horizontal roll can be efficiently cooled with the minimum amount of water. Therefore, although the cooling capacity increases by increasing the amount of cooling water of the upper horizontal roll, the problem that the cooling water remains on the web being rolled and causes uneven cooling can be solved.
The first and second flange cooling pipes and the web cooling pipe are arranged in the width direction and the height direction by the first and second roll width direction position adjusting means and the first and second roll height position adjusting means. Since it can move, the nozzle position can be adjusted according to the width and height of the upper horizontal roll after the rearrangement. Further, since the upper horizontal roll can be retracted to the outside in the radial direction at the time of rearrangement, it is not necessary to remove the upper horizontal roll cooling device from the housing for roll rearrangement.
In the upper horizontal roll cooling device of the universal rolling mill according to the present invention, the first and second flange cooling pipes are supplied with cooling water formed inside the first and second roll height position adjusting means. It is also possible to connect to a passage.
For example, when a hydraulic cylinder is used for the first and second roll height position adjusting means, a cooling rod is passed through a cooling water feed passage formed inside the hollow rod. Therefore, the temperature rise of the hydraulic cylinder can be prevented and the reliability of the apparatus can be increased.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.
First, a configuration of a universal rolling mill 11 to which an upper horizontal roll cooling device 10 according to an embodiment of the present invention is attached will be described with reference to FIG.
The universal rolling mill 11 connects a pair of left and right portal-shaped housings 12 and 13 with tie rods 15 and 15a with hydraulic cylinders 14 and 14a so that the width between the housings 12 and 13 can be adjusted.
A balance beam 26 is suspended above the housings 12 and 13 via reduction balance cylinders 24 and 25. The ends of the upper roll chocks 20 and 21 are hooked on both ends of the balance beam 26, respectively.
In addition, reduction cylinders 18 and 19 are provided on the upper portions of the housings 12 and 13 so that the upper roll chocks 20 and 21 can be reduced downward.
An upper horizontal roll 23 is rotatably attached to the upper roll chocks 20 and 21 via an upper roll shaft 22. The driving device is not shown.
[0008]
The reduction balance cylinders 24 and 25 support the weight of the upper horizontal roll 23 upward via the balance beam 26 and the upper roll chock 20 and 21.
During operation of the universal rolling mill 11, the reduction cylinders 18 and 19 generate a large force for reducing the web 29 of the material 28 to be rolled. At this time, the upper roll chock 20, 21 pushes down the balance beam 26 against the force of the reduction balance cylinders 24, 25, and when the force of the reduction cylinders 18, 19 decreases, the balance beam is generated by the force of the reduction balance cylinders 24, 25. 26 is pulled upward together with 26. Accordingly, the balance beam 26 moves up and down in synchronization with the upper horizontal roll 23. Further, the upper horizontal roll cooling device 10 provided on the balance beam 26 is also configured to be able to move following the vertical movement of the upper horizontal roll 23 when the upper horizontal roll 23 is pressed down.
[0009]
A lower horizontal roll 30 is provided below the upper horizontal roll 23 with a web 29 of the material 28 to be rolled interposed therebetween. The lower horizontal roll 30 is attached to the lower roll chock 32, 33 via the lower roll shaft 31, and the lower roll chock 32, 33 can be rolled up by the press-up cylinders 34, 34a provided at the lower portions of the housings 12, 13. It is configured.
On the sides of the left and right flanges 35 and 36 of the material 28, rolls 37 and 38 are provided so as to be able to press the flanges 35 and 36, respectively. The driving unit is not shown.
Next, the upper horizontal roll cooling device 10 attached to the universal rolling mill 11 will be described in detail with reference to FIGS.
[0010]
The upper horizontal roll cooling device 10 includes a gantry 40 provided on the balance beam 26 and horizontal moving rails 41 to 44 provided on the gantry 40. The horizontal movement rails 41 to 44 are respectively provided in parallel along the axial direction of the upper horizontal roll 23.
Between the horizontal movement rail 41 and the horizontal movement rail 42 of the gantry 40, elongated holes 45 and 46 are formed along the direction of the horizontal movement rail 41, and similarly between the horizontal movement rail 43 and the horizontal movement rail 44. Long holes 47 and 48 are formed.
The upper horizontal roll cooling device 10 is provided with first and second roll width direction position adjusting means 49 and 50 that can move forward and backward in opposition to the horizontal moving rails 41 to 44, respectively. The second roll width direction position adjusting means 49 and 50 are respectively provided with first and second roll height position adjusting means 51 and 52 which are provided so as to be able to move up and down synchronously. The first roll height position adjusting means 51 includes a biaxial hollow cylinder 53 provided between one side of the horizontal movement rail 41 and the horizontal movement rail 42, and one side of the horizontal movement rail 43 and the horizontal movement rail 44. It is provided at the middle position between the double-shaft hollow cylinder 54 and the double-shaft hollow cylinders 53, 54, and is connected to the upper end of the lift rod 56 of the double-shaft hollow cylinder 54. And a lift position sensor 55 for detecting the position. In addition, the lower part of each raising / lowering rod 56 of both shaft hollow cylinders 53 and 54 penetrates the long holes 45 and 47 of the mount frame 40, and protrudes below.
Each of the two-axis hollow cylinders 53 and 54 is connected to a hydraulic pressure source (not shown) and can raise and lower each lifting rod 56 in synchronization. Further, the vertical position of the lifting rod 56 can be confirmed by the lifting position sensor 55.
The second roll height position adjusting means 52 includes a biaxial hollow cylinder 54 provided between the horizontal movement rail 41 and the other side of the horizontal movement rail 42, and the other of the horizontal movement rail 43 and the horizontal movement rail 44. It has a double-shaft hollow cylinder 53 provided between the sides and a lift position sensor 55, and has the same configuration as the first roll height position adjusting means 51.
[0011]
Further, the first roll width direction position adjusting means 49 connects the upper parts of the double-shaft hollow cylinders 53, 54, and a connecting member 57 that supports the lift position sensor 55 in the middle thereof, and the double-shaft hollow cylinders 53, 54. The bracket 60 is connected to the lower end flanges 58 and 59 and supports the hollow cylinders 53 and 54 and is mounted on the horizontal movement rails 41, 43 and 44, respectively. Further, the bracket 61 for placing the double-shaft hollow cylinder 53 on the horizontal movement rail 42 extends to the vicinity of the center of the horizontal movement rail 42, and a rack 62 is formed on the surface of the horizontal movement rail 43 side.
Since the configuration of the second roll width direction position adjusting unit 50 is the same as that of the first roll width direction position adjusting unit 49, the description thereof is omitted.
The bracket 63a of the double-shaft hollow cylinder 53 of the second width direction position adjusting means 50 disposed opposite to the bracket 61 of the first roll width direction position adjusting means 49 extends from the other end of the horizontal movement rail 43 to the vicinity of the center. Extendingly, a rack 63 is formed on the surface of the horizontal moving rail 42, and between the rack 62 and the rack 63, pinions 64 that mesh with the racks 62 and 63 are provided. A hydraulic motor 65 that rotates the pinion 64 is provided below the pinion 64, and a rotational position detection device 66 is provided above the pinion 64.
[0012]
By operating the hydraulic motor 65, the racks 62 and 63 can be moved in the opposite directions by substantially the same distance. When the necessary moving distance is known, a rotation angle of the pinion 64 corresponding to the moving distance is calculated using a predetermined pitch circle diameter of the pinion 64, and the hydraulic motor 65 is calculated by the calculated rotation angle. The position can be accurately moved by a predetermined distance while the current position is confirmed by the rotational position detector 66.
A plurality of nozzles 67 attached to the first and second roll height position adjusting means 51 and 52 at the lower part of the upper horizontal roll cooling device 10 and capable of jetting cooling water to both side surfaces of the upper horizontal roll 23, First and second flange cooling pipes 68 and 69 each having 67a are provided, and the first flange cooling pipe 68 has a number of nozzles capable of jetting cooling water to the peripheral surface of the upper horizontal roll 23. A web cooling pipe 71 having 70 is provided.
[0013]
The first flange cooling pipe 68 is provided at the lower end of the cooling water feed passages 72 and 73 respectively formed in the lift rods 56 of the biaxial hollow cylinders 53 and 54 of the first roll height position adjusting means 51. While being connected in communication, it is formed in an arc along the upper end of one side of the upper horizontal roll 23.
The second flange cooling pipe 69 is provided at the lower end of the cooling water feed passages 72 and 73 respectively formed in the lift rods 56 of the biaxial hollow cylinders 53 and 54 of the second roll height position adjusting means 52. The first flange cooling pipe 68 has the same shape as that of the first flange cooling pipe 68 and is formed in an arc shape along the upper end of the other side portion of the upper horizontal roll 23. The nozzles 67 and 67 a are disposed so as to face each other with their jet ports facing the side surface of the upper horizontal roll 23. The web cooling pipe 71 is connected to one end of the first flange cooling pipe 68 and extends in the axial direction of the upper horizontal roll 23.
With this configuration, the positions of the nozzles 67, 67a, and 70 can be arranged at appropriate positions in accordance with changes in the roll width and roll diameter, that is, the circumferential surface and side surface positions associated with the replacement of the upper horizontal roll 23. it can. And it can cool efficiently by evenly applying the minimum cooling water to the upper horizontal roll 23, and the temperature rise of the upper horizontal roll 23 can be prevented.
[0014]
Next, the configuration of piping connected to the upper horizontal roll cooling device 10 and the flow of cooling water will be described.
As shown in FIGS. 2 and 3, water cooling pipes 74 fixedly disposed on the housings 12 and 13 of the universal rolling mill 11 are provided above the two-shaft hollow cylinders 53 and 54 that are provided two by two. Yes. Each of the water cooling pipes 74 and the cooling water feed passages 72 and 73 of the double-shaft hollow cylinders 53 and 54 are connected by a flexible tube 75 so that they can follow the vertical and horizontal movements of the double-shaft hollow cylinders 53 and 54. Yes.
The cooling water sent from the water cooling pipe 74 passes through the cooling water feed passages 72 and 73 in the double-axis hollow cylinders 53 and 54 via the flexible tube 75, and is used for cooling the first and second flanges. Move to the pipes 68 and 69 and the web cooling pipe 71. The cooling water is ejected from the nozzles 67, 67 a, 70 to the upper part of the upper horizontal roll 23.
[0015]
The upper part of the universal rolling mill 11 provided with the upper horizontal roll cooling device 10 is a high temperature, high humidity, and a bad environment where scales and the like are generated. Since 72 and 73 are formed, the cooling effect can be enhanced and the reliability of the apparatus can be improved.
Further, the upper horizontal roll 23 moves up and down in accordance with the web thickness of the material 28 to be rolled, and the balance beam 26 moves following this, but the upper horizontal roll cooling device 10 is also provided on the balance beam 26. Therefore, even when the upper horizontal roll 23 moves up and down, the relative positions of the first and second flange cooling pipes 68 and 69 and the web cooling pipe 71 do not change. Therefore, the upper horizontal roll 23 can be cooled uniformly regardless of the rolling conditions.
[0016]
Next, the operation of the upper horizontal roll cooling device 10 when the upper horizontal roll 23 is replaced will be described.
First, the raising and lowering rods 56 of the two-bore hollow cylinders 53 and 54 are raised synchronously, and the upper end positions of the first and second flange cooling pipes 68 and 69 are made higher than the upper end position of the upper horizontal roll 23. .
Then, the upper horizontal roll 23 is pulled out in the axial direction, and a new roll is attached.
Next, the hydraulic motor 65 is operated, and the first and second roll width direction position adjusting means 49 and 50 are moved away from each other, and the distance between the first and second flange cooling pipes 68 and 69 is moved. Is wider than the width of the new roll.
Next, the lifting rods 56 of the two-bore hollow cylinders 53 and 54 are lowered synchronously, and the positions of the first and second flange cooling pipes 68 and 69 are set to a predetermined height position on the roll side portion newly provided. Move.
[0017]
Then, the hydraulic motor 65 is actuated to move the first and second roll width direction position adjusting means 49 and 50 in the approaching direction, and the first and second flange cooling pipes 68 and 69 are moved to the roll side portion. Move closer to the specified distance.
In this way, the upper horizontal roll 23 can be replaced without removing the upper horizontal roll cooling device 10. Moreover, since it is not necessary to attach or detach each cooling pipe, the roll replacement time can be shortened.
As mentioned above, although embodiment which concerns on this invention has been described, this invention is not limited to the said embodiment, For example, when the lower space of a universal rolling mill is sufficiently wide, it concerns on this invention. It is also possible to apply the upper horizontal roll cooling device to the lower horizontal roll.
Further, although the web cooling pipe 71 is provided at one end of the first flange cooling pipe 68, it may be provided in the second flange cooling pipe 69, or may be provided in both.
Furthermore, although the four rails on which the first and second roll width direction position adjusting means 49 and 50 move are provided, they can be supported by two, and the first and second roll heights can be supported. Although a total of four double-shaft hollow cylinders are used for the position adjusting means 51 and 52, it is possible to use one by one.
[0018]
【The invention's effect】
In the upper horizontal roll cooling device of the universal rolling mill according to claim 1 and 2, the first and second flange cooling pipes and the web cooling pipe are the first and second roll width direction position adjusting means and Since the first and second roll height position adjusting means can move in the width direction and the height direction, the nozzle position can be adjusted in accordance with the width and height of the upper horizontal roll after the rearrangement. Moreover, since it can retract | save to the radial direction outer side of an upper horizontal roll at the time of a recombination, it is not necessary to remove and a recombination time can be shortened.
In addition, the upper horizontal roll cooling device is provided with a balance beam that moves up and down in synchronization with the upper horizontal roll. It can be efficiently cooled with the minimum amount of water. In particular, in the upper horizontal roll cooling device of the universal rolling mill according to claim 2, the first and second flange cooling pipes are formed in the first and second roll height position adjusting means. Since it is connected to the water supply passage, it is possible to prevent the temperature rise of the elevating means by passing the cooling water through the cooling water supply passage, to improve the reliability of the device, and to make the device compact.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a universal rolling mill to which an upper horizontal roll cooling device of a universal rolling mill according to an embodiment of the present invention is applied.
FIG. 2 is an explanatory view showing a mounting position of the upper horizontal roll cooling device of the universal rolling mill.
FIG. 3 is a perspective view showing a configuration of an upper horizontal roll cooling device of the universal rolling mill.
[Explanation of symbols]
10: Upper horizontal roll cooling device, 11: Universal rolling mill, 12, 13: Housing, 14, 14a: Hydraulic cylinder, 15, 15a: Tie rod, 18, 19: Reduction cylinder, 20, 21: Upper roll chock, 22: Upper Roll axis, 23: Upper horizontal roll, 24, 25: Reduction balance cylinder, 26: Balance beam, 28: Rolled material, 29: Web, 30: Lower horizontal roll, 31: Lower roll axis, 32, 33: Lower roll chock , 34, 34a: Uplift cylinder, 35, 36: Flange, 37, 38: Saddle roll, 40: Base, 41-44: Horizontal movement rail, 45-48: Long hole, 49: First roll width direction position Adjusting means, 50: second roll width direction position adjusting means, 51: first roll height position adjusting means, 52: second roll height position adjusting means, 53, 5 : Double shaft hollow cylinder, 55: Lift position sensor, 56: Lift rod, 57: Connecting member, 58, 59: Lower flange, 60, 61: Bracket, 62, 63: Rack, 63a: Bracket, 64: Pinion, 65 : Hydraulic motor, 66: rotational position detector, 67, 67a: nozzle, 68: first flange cooling pipe, 69: second flange cooling pipe, 70: nozzle, 71: web cooling pipe, 72, 73: Cooling water feed passage

Claims (2)

A stand provided on a balance beam that moves up and down in synchronization with the upper horizontal roll;
A horizontal movement rail provided on the gantry along the axial direction of the upper horizontal roll;
First and second roll width direction position adjusting means provided so as to be capable of advancing and retreating facing each other along the horizontal movement rail;
First and second roll height position adjusting means provided in the first and second roll width direction position adjusting means and provided so as to be vertically movable in synchronization with each other;
First and second flange cooling pipes which are attached to the first and second roll height position adjusting means and each include a plurality of nozzles capable of ejecting cooling water on both side surfaces of the upper horizontal roll;
A web cooling pipe provided on at least one of the first and second flange cooling pipes and provided with a number of nozzles capable of jetting cooling water on the peripheral surface of the upper horizontal roll;
An apparatus for cooling an upper horizontal roll of a universal rolling mill, wherein the upper horizontal roll cooling apparatus is provided so as to be able to move following the vertical movement of the upper horizontal roll during the reduction. The upper horizontal roll cooling device of the universal rolling mill according to claim 1, wherein the first and second flange cooling pipes are formed in the first and second roll height position adjusting means. An upper horizontal roll cooling device for a universal rolling mill characterized by being connected to a feeding passage.

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