JPS637841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll bending device, and more particularly to a roll bending device that can be easily disassembled and assembled.

Generally, a rolling mill has work rolls 1 and 2 and backup rolls 3 and 4, as shown in FIGS. 1 and 2, and these rolls 1 and 4 are supported by jocks 5 and 8, respectively. I have to. Further, the chocks 5 to 8 are housed within a housing 9. Such a rolling mill is equipped with a roll bending device for adjusting the elongation state of the rolled material 10 (FIGS. 3 to 5), and the work rolls 1 and 2 are shaped into concave crowns by this device. Give day crease bending (3rd
(Fig. 4) and increases bending to create a convex crown (Fig. 4). These operations are carried out using the day crease cylinder 11 interposed between the work roll jocks 5, 6 and the backup roll jocks 7, 8, or the ink cylinder 11 interposed between the upper and lower work roll jocks 5, 6. This is done by the Leeds cylinder 12.

By the way, in the above-mentioned conventional roll bending device, as shown in FIG. 5, due to the structure of the back-up roll jocks 7 and 8, holes 13 and lubricating oil holes 14 are provided in the bearing portions. Since it is located at the mounting position of the day crease cylinder 11 and at the point of force application, there are restrictions on the cylinder arrangement and the magnitude of the bending force. For this reason, roll bending devices have been proposed that provide day crease and increase bending only between the work roll jocks 5 and 6.

A conventional roll bending device is shown in FIGS. 6-8. Such a device includes a piston rod 15 interposed between upper and lower work roll jocks 5 and 6.
and a piston part 1 at the end inserted into the lower chock 6.
6 and provided in the lower chock 6
7, the piston rod 15 is moved up and down by hydraulic pressure. On the other hand, for the upper choke 5, a mounting bracket 18 integrally attached to the piston rod 15 is inserted into an insertion hole 19. The mounting bracket 18 has a hammer head portion 20 at its tip, which allows the upper chock 5 to be pressed upward. Further, the upper chock 5 has a horizontal hole 21 that communicates with the upper part of the insertion hole 19, and a U-shaped socket 22 is inserted into the horizontal hole 21. The lever 22 is fitted into the lower small diameter portion 23 of the hammer head portion 20 inserted into the insertion hole 19, connects the piston rod 15 and the upper chock 5, and supports the day crease bending force. be. Therefore, in such a roll bending device, increase bending is performed by pressing the upper work roll yoke 5 through the hammer head portion 20 by upward movement of the piston rod 15, and day increase bending is performed by moving the piston rod 15 upwardly to press the upper work roll chock 5. This is done by attracting the upper chock 5 through the hammer head 20 and the lever 22 by moving it downward.

However, the roll bending device described above has a drawback that it is extremely difficult to use in practice. That is, when replacing rolls, it is necessary to disassemble and assemble the roll bending device, but this work is extremely complicated. Specifically, the upper and lower work roll chock 5 and 6 are assembled outside the mill, but the upper chock 5 is attached to the lower work roll assembly from above. At this time, operate the hydraulic system to push up the piston rod 15, and insert the lever 22 by hand into the upper chock 5.
3 must be fitted. For this reason, conventional equipment always requires hydraulic operation.
There is a risk of hydraulic oil leakage, and since it is necessary for the worker to attach the clasp 22, there is a problem that the work efficiency is extremely poor. in this case,
Although it is possible to perform pneumatic operation instead of hydraulic operation, it cannot be applied to the roll bending device because air is enclosed by the subsequent supply of hydraulic oil and vibrations and vapor lock phenomena occur.

SUMMARY OF THE INVENTION The present invention focuses on the problems of the conventional apparatus and aims to provide a roll bending apparatus that can efficiently perform assembly and disassembly operations.

In order to achieve such an object, the roll bending device according to the present invention is particularly provided with a hammer head portion at the tip of the piston rod, through which the hammer head portion is penetrated and which can lock the hammer head portion by its rotation. A receiving seat is provided in the choke insertion hole, and an actuating shaft having a protrusion that can be fitted to and removed from the hammer head and capable of transmitting rotation is arranged along the axial direction of the piston rod, and the actuating shaft is adjacent to the actuating shaft. A double cylinder body with a built-in spring is provided, and one end of the double cylinder body can be elastically biased. The roll bending device is equipped with an air cylinder device, and the roll bending device can be disassembled and assembled in one operation.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings from FIG. 9 onwards.

FIG. 9 shows a sectional view of the roll bending device according to this embodiment in an assembled state. As shown in this figure, a piston rod 15 constituting a roll bending device is interposed between jocks 5 and 6 that support a pair of upper and lower work rolls 1 and 2. The lower end side of this piston rod 15 is inserted into the lower work roll chock 6, and a piston cylinder mechanism is formed by the piston part 16 provided at the insertion end and the cylinder part 17 formed in the lower chock 6. . The cylinder part 17 has a piston part 1
Hydraulic oil supply/discharge ports 24A, 24B are bored between the piston rods 6 and 6, and the piston rod 15 is moved up and down by supplying or discharging hydraulic oil from a hydraulic device (not shown) to the supply/discharge ports 24A, 24B. It is something.

On the other hand, the upper end of the piston rod 15 is inserted into the upper work roll chock 5 together with a mounting fitting 25 integrally fitted to the upper end of the piston rod 15. A guide groove 26 parallel to the axial direction of the piston rod 15 is formed on the outer side of the mounting bracket 25.
On the other hand, a guide piece 28 that fits into the guide groove 26 is provided in the gland portion 27 that closes the cylinder portion 17 . The guide means constituted by the guide groove 26 and the guide piece 28 serves to guide and restrict the piston rod 15 from rotating when it moves upward, and after the piston rod 15 has moved upward a certain distance. The guidance is being lifted. Further, a small diameter portion 29 and an oval-shaped hammer head portion 30 provided at the tip of the small diameter portion 29 are formed on the upper end side of the mounting bracket 25. An insertion hole 31 is bored in the upper choke 5 so that the piston rod 15 equipped with such a mounting fitting 25 can be inserted therein. A seat 32 is provided in the middle of the insertion hole 31 to allow the hammer head portion 30 to pass therethrough. This catch 32
As shown in FIG. 14, a pair of semilunar seats 33 are formed by boring a pair of semilunar seats 33 to face each other in an insertion hole 31 having a circular cross section, and the pair of semilunar seats 3
3, an oval-shaped through hole 34 is formed. The through hole 34 is sized to allow the hammer head 30 to pass therethrough, and is set such that the hammer head 30 exits the through hole 34 at a position where the guide means consisting of the guide groove 26 and the guide piece 28 is released. . The through hole 34 is adjusted so that the hammer head 30 can be inserted therethrough only when it is regulated by the guide means. Also, catch seat 3
The innermost part of the insertion hole 31 divided by 2 is made large enough to accommodate the hammer head 30 that has passed through the through hole 34.
By rotating 90 degrees, both ends of the hammer head portion 30 are supported by the catch seat 32. By this rotation of the hammer head portion 30, the piston rod 15 and the upper chock 5 are connected. A stopper 35 is provided at one end of each half-moon seat 33 corresponding to a 180-degree symmetrical position of the through hole 34 for stopping the hammer head 30 that has passed through it at a 90-degree rotation position.

Further, in the upper work roll chock 5, an insertion hole 31 is located at the axial center position of the piston rod 15.
A small-diameter through hole 36 that opens at the bottom of the shaft is provided, and an actuating shaft 37 is inserted into the through hole 36.
This operating shaft 37 is freely rotatable in the axial direction and rotation within the through hole 36, and is
It is movable up and down together with the hammer head 30 inserted into the shaft. A protrusion 38 having a rectangular cross section is provided on the lower end surface of the operating shaft 37.
8 is a square hole 3 drilled in the top surface of the hammer head 30
9, it can be inserted and removed. Therefore, the piston rod 15 and the operating shaft 37 are connected to the square hole 3.
By fitting the protrusion 38 into the projection 9, rotation can be transmitted to each other, and axial movement can also be transmitted. The operating shaft 37 has a spline 40 formed in its upper half, and a rack 41 extending in the circumferential direction in its lower half. This operating shaft 37 has a spline 3
A pinion gear 42 is fitted into the upper chock 5 and is rotatable at a fixed position in the upper chock 5.
rotation is now taking place. Further, a pinion gear shaft 43 disposed perpendicularly to the operating shaft 37 is mounted on the rack portion 41 of the operating shaft 37.
are meshed and connected, and the pinion gear shaft 43 is rotated as the actuating shaft 37 moves in the axial direction. This pinion gear shaft 43 is integrally provided with a pinion gear portion 44 on the vehicle.

On the other hand, as shown in FIG.
A through hole 45 is formed in a direction perpendicular to both of the holes 3 and 3. A double cylindrical body consisting of an inner cylinder 46 and an outer cylinder 47 is inserted into the through hole 45, and a compression coil spring 48 is provided inside the double cylindrical body to move the two cylindrical bodies 46, 47 away from each other. It is energizing. In such a double cylinder body, the outer cylinder 47
A rack portion 49 is provided in the longitudinal direction of the lower surface thereof, and is meshed with the pinion gear portion 44 of the pinion gear shaft 43 facing into the through hole 42. Similarly, a rack portion 50 is provided in the longitudinal direction of one side of the inner tube 46, and the rack portion 50 is exposed through a window portion 51 formed in the side wall of the outer tube 47. The rack portion 50 is meshed with the pinion gear 42 facing into the through hole 45. Therefore, in response to the axial movement of the actuating shaft 37, the outer cylinder 47 moves in the axial direction within the through hole 45, and on the other hand, in response to the rotation of the actuating shaft 37, the inner cylinder 46 also moves within the through hole 45. It can be moved in the axial direction. Naturally, the window part 51 of the outer cylinder 47 is connected to the rack part 50 and the inner cylinder 4.
It is formed so as not to inhibit the movement of 6.

Furthermore, an air cylinder device 52 is attached to one end side of the through hole 45 provided in the upper work roll chock 5, and is capable of elastically biasing the one end side of the double cylinder body. Specifically, as shown in FIGS. 10 and 12, a cylinder 53 that closes the through hole 45 is fixed to the outer wall of the upper chock 5 in a protruding state, and a piston shaft is installed in the cylinder 53. 5
4 is interpolated. The piston shaft 54 has an air supply hole 55 provided on the protruding end surface of the cylinder 53.
By injecting air into the through hole 45 , the end face of the double-cylindrical inner cylinder 46 can be pressed against the spring 48 .

The roll bending device according to this embodiment configured as described above operates as follows. That is, when replacing the rolling rolls and assembling the upper and lower work roll jocks 5 and 6 to assemble the roll bending device, the upper work roll jocks 5 are inserted into the lower work roll jocks 6 from above through the insertion holes 31. The upper end of the piston rod 15 is inserted into and installed. At this time, attach the mounting bracket 25 at the tip of the rod 15 to the guide piece 28 and the guide groove 26.
Insert with guidance restrictions. When the mounting bracket 25 moves upward through the insertion hole 31, the hammer head 30 moves into the catch seat 3.
The square hole 39 fits into the protrusion 38 of the actuating shaft 37 which is inserted into the through hole 34 between the two and at the same time awaits the hammer head 30. Then, when the upper chock 5 descends until the guide groove 26 and the guide piece 28 are disengaged, the piston rod 15 moves relatively upward, and the operating shaft 3
7 move up at the same time. This upward movement of the operating shaft 37 rotates the pinion gear shaft 43 and moves the outer cylinder 47 toward the air cylinder device 52 side. Due to this movement of the outer cylinder 47, the spring 48
Although the inner cylinder 46 is also biased in the same direction via the hammer head, the oval parallel portion of the hammer head is guided by the inner wall of the hole 34, so the operating shaft 37 does not rotate. When the hammer head is completely removed, the inner cylinder 46 is moved by the spring 48. At this time, by leaving the air supply hole 55 of the air cylinder device 52 open, the inner cylinder 46 moves smoothly. This movement of the inner cylinder 46 is simultaneously carried out by the pinion gear 4.
13A, and the hammer head 30 is rotated from the state shown in FIG. 13A to the state shown in FIG. . This rotation of the hammer head 30 is stopped by a stopper 35, and the hammer head 30 is locked to the catch seat 32. In this state, the hammer head 30 does not come out of the insertion hole 31 downward, so the upper choke 5 is connected.
Assembly of the roll bending device is completed.

On the other hand, when disassembling the roll bending device, this can be easily done by injecting air through the air supply hole 55 of the air cylinder device 52.
That is, when the piston shaft 54 is driven by air injection and presses the inner cylinder 46, the inner cylinder 46 moves the actuating shaft 37 via the pinion gear 42 to the thirteenth
Rotate 90 degrees from the state shown in Figure B to the state shown in Figure A.
Further, since the movement of the inner cylinder 46 simultaneously urges the outer cylinder 47 to move in the same direction by the action of the spring 48, the rack portion 49 of the outer cylinder 47 is moved immediately after the hammer head 30 is in the state A. causes the actuating shaft 37 to move downward. Through this series of operations, the hammer head 30
2 and exits from the through hole 34. After this operation is completed, the upper chock 5 is removed from the lower chock 6, thereby completing the disassembly of the roll bending device.

In this way, in this embodiment, it is possible to disassemble and assemble the roll bending device in one operation, and the operation can be performed efficiently. Furthermore, by increasing the efficiency of the disassembly and assembly work of the roll bending device, the time required for changing rolls can be shortened.

It should be noted that this apparatus is of course applicable not only to the four-high rolling mill as in the embodiment, but also to other two-high and six-high rolling mills.

As described above, according to the present invention, it is possible to efficiently assemble and disassemble a roll bending device.

[Brief explanation of the drawing]

Figure 1 is a roll arrangement diagram of the rolling mill, Figure 2 is a side view of the rolling mill, Figure 3 is a schematic diagram of the decrease bending state, Figure 4 is a schematic diagram of the increase bending state, and Figure 5 is a diagram of the roll arrangement of the rolling mill. is a schematic configuration diagram of a general roll bending device, FIG. 6 is a sectional view of a conventional roll bending device, FIG. 7 is a sectional view taken along the - line in FIG. 9 is a sectional view of the roll bending device according to the present embodiment in an assembled state, FIG. 10 is a sectional view taken along the line - in FIG. 9, and FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10. , FIG. 12 is an exploded perspective view of the roll bending device of this embodiment, FIGS. 13A and 13B are plan views showing the before and after rotation of the hammer head portion, and FIG. 14 is a perspective view of the catch portion. 1, 2... Work roll, 5, 6... Work roll chock, 15... Piston rod, 16...
... Piston part, 17 ... Cylinder part, 25 ... Mounting bracket, 30 ... Hammer head part, 31 ... Insertion hole, 32 ... Seat, 37 ... Operating shaft, 38
... Protrusion, 39 ... Square hole, 46 ... Inner cylinder, 47
... Outer cylinder, 48 ... Spring, 52 ... Air cylinder device.

Claims (1)

[Claims] 1 In a roll bending device that applies day crease or increase bending to a roll by moving a pair of work roll jocks close to each other and away from each other, a piston rod having a piston portion and a hammer head portion at the end is interposed between the two work roll jocks. One chock into which the piston portion is inserted is formed with a cylinder portion that allows the piston rod to move in the axial direction, and the other chock is provided with an insertion hole for the hammer head portion, and the insertion hole is provided with a hole through which the hammer head portion passes. A catch is provided to lock the hammer head when the hammer head rotates, and an actuating shaft is connected to the piston rod shaft. a double cylinder that is movable and rotatable in the axial direction along the center direction, and includes a cylinder that responds to the axial movement of the actuating shaft; a cylinder that responds to the rotation; and a spring interposed between the cylinders. 1. A roll bending device, characterized in that a body is provided adjacent to an operating shaft, and an air cylinder device is provided on one end side of the double cylinder body to enable the double cylinder body to be elastically biased.