JPS6225043B2 - - 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 contained within the 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. Because the day crease cylinder 11 is installed and located at the point of force application, there are restrictions on the cylinder arrangement and the magnitude of the bending force.For this reason, conventionally, the day crease and bending were performed only between the work roll jocks 5 and 6. Roll bending devices that provide increased bending have been proposed.

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 the above object, the roll bending device according to the present invention includes a piston rod having a piston portion and a hammer head portion having a tapered surface on the front end side line and a locking step portion on the rear end side at the end thereof. One chock which is interposed between the work roll chock and into which the piston part is inserted is formed with a cylinder part that allows the piston rod to move in the axial direction, and the other chock is provided with an insertion hole for the hunt head. At the same time, a locking pawl is provided that is elastically projected by a spring from a horizontal hole formed on the inner wall side of the insertion hole, and the locking pawl has a locking pawl at the tip thereof on the side that contacts the tapered surface of the hammer head portion. Forming a tapered surface for the locking pawl to be pushed and spread, and forming a stepped portion on the side that engages with the locking stepped portion of the hammer head after the locking pawl is pushed and spread and the hammer head is inserted, and the locking A flange is formed at the rear end of the claw,
An air passage is provided for supplying air to a gap formed between the flange portion and a step portion located in front of the flange in the side hole, and the hammer head portion is communicated with the air passage. It is constructed with a pressurable air cylinder mechanism, and when the roll bending device is assembled, the hammer head is fixed by the reciprocating movement of the locking pawl, and when disassembled, the engagement between the locking pawl and the hammer head is released by air pressure feeding. In addition, the hammer head can be pushed down to simplify assembly and disassembly work.

Embodiments of the present invention will be described in detail below with reference to the drawings from FIG. 9 onwards.

The roll bending device according to this embodiment has a piston rod 15 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 side and the cylinder part 17 formed in the lower chock 6. There is. Hydraulic oil supply/discharge ports 24A, 24B are bored in the cylinder portion 17, sandwiching the piston portion 16. Hydraulic oil is supplied to or discharged from a hydraulic device (not shown) to these supply/discharge ports 24A, 24B. This is used to move the piston rod 15 up and down.

On the other hand, the upper end of the piston part 15 is inserted into the upper work roll chock 5 together with a mounting fitting 25 integrally connected to the upper end of the piston rod 15. This mounting bracket 25 is screwed coaxially to the piston rod 15, and has a mounting base 26 to this rod 15.
A small diameter portion 27 extends upward from the small diameter portion 27, and a hammer head portion 28 is formed at the upper end of the small diameter portion 27. A tapered surface 29 is formed at the tip side edge of the hammer head portion 28, and a locking step portion 30 is formed between it and the other small diameter portion 27. 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 pair of horizontal holes 32A and 32B bored in the upper chock 5 are opened midway through the insertion hole 31. The horizontal holes 32A, 32B are orthogonal to the insertion hole 31, and the openings thereof are formed at positions 180 degrees opposite to the insertion hole 31.

Cylinders 33A, 33B with open ends are installed in the horizontal holes 32A, 32B, respectively, and locking claws 34A, 34B are slidably inserted into the cylinders 33A, 33B. Focusing on one cylinder 33A and locking pawl 34A (right side in FIG. 11), the tip of the locking pawl 34A can be inserted into and taken out from the insertion hole 31, and the hammer head portion 28 is in a protruding state from the tip. A step portion 35A that can engage with the locking step portion 30 to prevent it from coming off is formed in the upper half. Further, a tapered surface is formed on the lower surface side of the tip. Also, a lid body 36 that closes the rear end portion of the locking claw 34A and the external opening of the cylinder 33A.
A spring 37A is disposed between A and A. This spring 37A always urges the locking pawl 34A to protrude into the insertion hole 31. Further, the inner diameter of the cylinder 33A is such that the front half on the opening side to the insertion hole 31 is a small diameter section 38A, and the rear half on the lid body 36A side is a large diameter section 39A. The main body of the locking pawl 34A is attached to the key 40 in the small diameter portion 38A.
A and a guide 41A to allow sliding movement in the axial direction while being regulated. Further, a piston flange portion 42A formed on the outer peripheral edge of the rear end of the locking claw 34A is inserted into the large diameter portion 39A, and the piston flange portion 42A and the large diameter portion 39A form a piston cylinder mechanism. . This mechanism is for moving the locking pawl 34A backward.
By supplying working fluid to the gap 43A formed between the step between the small diameter section 38A and the large diameter section 39A of the cylinder 33A and the piston flange section 42A, it is possible to retreat against the spring 37A. It is said that Note that the above-mentioned configuration includes the other cylinder 33B and the locking claw 34B (left side in FIG. 11).
Since the same applies to , the same number and the same reference numeral B will be used and the explanation will be omitted.

The piston cylinder mechanism for moving the locking claws 34A, 34B backwards is operated by supplying working fluid through a fluid passage. That is,
One cylinder 33A has a first groove 44A formed in its outer peripheral surface corresponding to the small diameter portion 38A, and a second groove 45A corresponding to the large diameter portion 39A. The first groove 44A has a supply air passage 4 for introducing high pressure air as a working fluid from the outside.
6 and 47 are connected. This passage 46, 47
A hole is formed in the upper choke 5, and air can be introduced by connecting the passage 46 to high-pressure air supply means (not shown). Moreover, this first groove 44A is connected to the cavity 43A through the ventilation hole 48A.
The piston flange portion 42A is opened to allow air to be sent toward the piston flange portion 42A. A ventilation hole 49A is opened in the second groove 45A and communicates with the cavity 43A at a position where the locking claw 34A moves backward.

Further, a similar first groove 44B and a second groove 45B are formed for the other cylinder 33B, but the first groove 44B of this cylinder 33B is connected to the connecting air passage 50 bored in the upper choke 5. ,51
The second groove 45A of the cylinder 33A is communicated with the second groove 45A of the cylinder 33A. This first groove 44B further includes a cavity 43B.
The piston flange portion 42B of the left locking pawl 34B is in communication with the piston flange portion 42B of the left locking pawl 34B. Further, the second groove 45B has a cavity 43B at the backward movement position of the locking pawl 34B.
A ventilation hole 49B communicating with is opened. Further, as shown in FIG. 10, the second groove 45B communicates with air passages 52 and 53 bored in the upper part of the upper chock 5.
3 is in communication with an air cylinder mechanism 54 provided at the upper center of the upper choke 5.

The air cylinder mechanism 54 includes a cylinder portion 55 coaxially drilled in the upper part of the upper choke 5 with the center axis of the insertion hole 31, and a piston 56 inserted into the cylinder portion 55.
The piston 56 is pushed down by air pressure supplied from the piston 3. piston 5
6 is integrally provided with a rod 57 at the center of its lower surface, and a through hole 58 of this rod 57 is provided between the cylinder portion 55 and the insertion hole 31. Therefore, as the piston 56 descends, the rod 57 protrudes from the bottom of the insertion hole 31 and can press the top surface of the hammer head 28 accommodated within the insertion hole 31.

The above-mentioned structure is composed of the upper and lower chock 5 and 6 arranged at one end of the work rolls 1 and 2, but the upper and lower chock arranged at the other end are also constructed in the same way, and both Air flow passages are provided to interlock with each other. That is, as shown in FIG. 13, the first groove 44A of the right cylinder 33A
The supply air passage 46 further branches into communication air passages 59 and 60, and this branch passage 60 is introduced into the work roll chock at the other end of the roll.

The assembly and disassembly work of the roll bending device configured as described above is performed as follows. That is, when assembling the roll bending device by combining the upper and lower work roll jocks 5 and 6 by replacing the rolls, etc., insert the piston rod into the insertion hole 31 from above by inserting the upper work roll jolt 5 into the lower work roll chock 6. It is installed by inserting the upper end of 15. At this time, the ends of the pair of locking claws 34A and 34B are located inside the insertion hole 31, and the spring 37
It is biased by A and 37B and protrudes. When the piston rod 15 is inserted, the mounting bracket 25 provided at the upper end of the piston rod 15 moves upward, and the hammer head portion 28
and the locking claws 34A, 34B come into contact with each other. However, since the hammer head portion 28 is formed with a tapered surface 29 and the protruding lower surfaces of the locking claws 34A and 34B are also provided with tapered surfaces, the hammer head portion 28 allows the pair of locking claws 34A and 34B to
are pushed out and the hammer head portion 28 is smoothly inserted until it comes into contact with the bottom of the insertion hole 31. After that, the locking claws 34A, 34B are released from contact with the hammer head portion 28, so the springs 37A, 34B are released again.
37B, the locking stepped portion 30 of the hammer head portion 28 engages with the stepped portions 35A, 35B of the locking pawl to prevent the hammer head portion 28 from coming off. In such a state, the upper and lower chock 5,
6 are connected by a piston rod 15. Therefore, increase bending is performed by the hammer head 28 pressing the bottom of the insertion hole 31, and day increase bending is performed by pressing the bottom of the insertion hole 31 with the hammer head 28.
This is done by pulling the upper yoke 5 through A and 34B.

On the other hand, when the roll bending device is disassembled, this can be easily done by injecting high pressure air into the supply air passage 46. That is, the supplied air passes through the supply air passages 46 and 47 and passes through the 10th to 11th
It is first supplied to the first groove 44A of the cylinder 33A on the right side of the figure. Since this first groove 44A communicates with the cavity 43A through the ventilation hole 48A, the high pressure air acts on the piston flange portion 42A of the locking pawl 34A and moves the locking pawl 34A backward against the spring 37A. . This action causes the hammer head portion 28 to disengage from the locking pawl 34A. Also, due to the retreat of the locking claw 34A, the second groove 45A and the cavity 4
The first groove 4 of the left cylinder 33B is in communication with the second groove 45A, and the first groove 4 of the left cylinder 33B is in communication with the second groove 45A.
Air is supplied to 4B. This first groove 44B
Similarly, the air supplied to the locking pawl 34B moves backward through the ventilation hole 48B to release the engagement with the hammer head portion 28. In this way, the engagement state between the hammer head portion 28 and both locking claws 34A and 34B is released, but as the left locking claw 34B retreats, communication occurs between the second groove 45B and the cavity 43B.
As a result, the air flowing through the air passages 52 and 53 operates the air cylinder mechanism 54. This action causes the piston 56 to force the rod 57 to press the top surface of the hammer head portion 28 downward, thereby facilitating the removal of the upper chock 5.

As described above, according to this embodiment, the disassembly and assembly work of the roll bending device can be performed in one operation, and work efficiency can be improved. In particular, during assembly, it is only necessary to cover the upper chock 5 from above, and during disassembly, it is only necessary to supply high-pressure air to the air passage 46, so it is possible to perform simple work, and in particular, it is possible to perform hydraulic operation. This is not necessary and can be done very easily.

This equipment is not only suitable for 4-high rolling mills, but also for other 2-high rolling mills.
Of course, it can also be applied to high and 6-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 diagram of the roll arrangement of the rolling mill, Figure 2 is a side view of the rolling mill, Figure 3 is a schematic diagram of the increasing bending state, Figure 4 is a schematic diagram of the increasing bending state, and Figure 5 is a schematic diagram of the increasing bending state. 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. Cross-sectional view FIG. 9 is a cross-sectional view of the assembled state of the roll bending device according to this embodiment, and FIG.
11 is a sectional view taken along the line XI--XI of FIG. 10, FIG. 12 is an exploded perspective view of the roll bending device of this embodiment, and FIG. 13 is an air flow path diagram. 1, 2... Work roll, 5, 6... Work roll chock, 15... Piston rod, 16...
... Piston part, 17 ... Cylinder part, 25 ... Mounting bracket, 28 ... Hammer head part, 29 ... Tapered surface, 30 ... Locking step, 31 ... Insertion hole, 32
A, 32B...Side hole, 34A, 34B...Latching claw, 37A, 37B...Spring, 42A, 4
2B... Piston flange part, 46-47, 50
~53...Air passage, 54...Air cylinder mechanism.

Claims (1)

[Claims] 1. A roll bending device that applies day crease bending or increase bending to a roll by moving a pair of work roll jocks provided in a rolling mill closer to each other and away from each other,
A piston rod having a piston portion and a hammer head portion having a tapered surface on the tip side line and a locking step portion on the rear end side at the end is interposed between both work roll jocks, and the piston portion is inserted. One chock is formed with a cylinder part 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, and a horizontal hole formed on the inner wall side of the insertion hole is used to generate an elastic force using a spring. A locking pawl is provided that protrudes from the hammer head, and a tapered surface is formed at the tip of the locking pawl to allow the locking pawl to be pushed and spread on the side that contacts the tapered surface of the hammer head portion, and the locking pawl is A stepped portion is formed on the side of the hammer head that engages with the locking step after the hammer head is inserted into the hammer head, a flange is formed at the rear end of the locking pawl, and the flange portion and the inside of the horizontal hole are formed. An air cylinder mechanism is provided with an air passage for supplying air to a gap formed between the flange and the stepped portion located in front of the flange, and is capable of pressing the top surface of the hammer head that is communicated with the air passage. A roll bending device characterized by being provided with.