JPH0729146B2 - Forming roll equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a forming roll device.

[Prior Art] In a welded pipe, a strip plate is sequentially formed into a cylindrical shape by an edge bend roll 1, a break down roll 2, a side roll 3, and a fin pass roll 4 in a pipe making line as shown in FIG. Edges are welded by the squeeze rolls 5, heat treatment is then applied to the welded portions, and the final sizing rolls are formed to have a constant diameter and a perfect circle.

At this time, break roll 2 and fin pass roll 4
As shown in FIG. 12, the forming roll device including the upper and lower forming rolls 10 and 11 penetrates the upper and lower forming rolls 10 and 11 through the upper and lower roll shafts 8 and 9 supported by the drive side stand 6 and the operation side stand 7. I support it by putting it on. In FIG. 12, 12 is a bed, 13 is a chock for the roll shafts 8 and 9, and 14 and 15 are upper and lower universal joints.

[Problems to be Solved by the Invention] By the way, in the conventional forming roll device, when the roll is replaced with a change in the size of the pipe (especially, the outside diameter is changed), the forming roll is
Slide 10 and 11 onto the roll shafts 8 and 9,
Since the structure is removed from No. 9, it takes a lot of time to replace the rolls, and the operation rate of the pipe making line is lowered.

In addition, as the conventional roll exchange method, the following (1),
There is (2).

(1) As shown in FIG. 10, the operation side stand 7 is removed, and the roll shafts 8 and 9 are kept supported by the drive side stand 6, and the forming rolls 10 and 11 are set to the shafts of the roll shafts 8 and 9. Slide in the direction and pull out. This method is often used for small diameter mills.

(2) As shown in FIG. 11, the roll shafts 8 and 9 and the universal joints 14 and 15 are removed from the stands 6 and 7, the top caps on both sides of the stands 6 and 7 are removed, and the roll shafts 8 and 9 and the forming roll 10 are removed. , 11 are assembled in the chock 13 and removed from the stands 6 and 7 upward. This method is often used for medium-sized mills.

As described above, the roll exchange of (1) and (2) is performed every time the size of the pipe is changed, and when this is performed in all the mills of the pipe making line, it takes 5 to 6 hours to operate the mill. This leads to a decrease in the rate and productivity.

It is also proposed to prepare a set of a spare stand, a forming roll, and a bed assembly, and remove the set from the coupling portion of the mill drive shaft to replace the set. However, this method requires large-scale capital investment and also requires a large storage space for spare assembly parts.

It is an object of the present invention to easily perform roll exchange in a short time without involving large-scale capital investment, and to improve the operation rate of a pipe making line.

[Means for Solving the Problems] The present invention relates to a forming roll apparatus configured by supporting a forming roll on a roll shaft supported by a drive side stand and an operating side stand, wherein the roll shaft is a drive side roll shaft. It is divided into the operation side roll shaft, at least one of the drive side roll shaft and the operation side roll shaft is movable in the axial direction, and is formed at the roll supporting end portions of the drive side roll shaft and the operation side roll shaft facing each other. Both ends of the roll are clamped to support the forming roll.

[Operation] The conventional forming roll device is a system in which the forming roll is provided with a roll shaft through hole and is supported by mounting the forming roll on the roll shaft in a penetrating state. Was.

Therefore, in the present invention, the method of stopping the slide of the forming roll from the roll shaft and removing it, and not forming the roll shaft through hole in the forming roll and sandwiching both end surfaces of the forming roll by the left and right divided roll shafts And Then, at least one of the left and right roll shafts divided into two is structured to be slidable in the axial direction, and the forming roll is slid in the axial direction without pulling out the forming roll from the roll shaft each time the roll is replaced. Easy to support and remove.

FIG. 1 shows a method for detaching a forming roll device according to the present invention.

The upper and lower roll shafts 8 and 9 are divided into drive-side roll shafts 8A and 9A and operation-side roll shafts 8B and 9B with the forming rolls 10 and 11 interposed therebetween, and these left and right roll shafts 8A and 8B, 9A and 9B. The forming rolls 10 and 11 are sandwiched between and the forming rolls 10 and 11 are supported. When removing the forming rolls 10 and 11, as shown in FIG. 1B, the driving-side roll shafts 8A and 9A and the operating-side roll shafts 8B and 9B are slid in the axial direction to remove the forming rolls 10 and 11.
Release 11 and remove forming rolls 10, 11. Forming roll
When assembling 10 and 11, the reverse operation is performed, and the forming rolls 10 and 11 are set at predetermined positions on the roll shaft cores of the roll shafts 8A, 8B, 9A, and 9B, and as shown in FIG. As shown in a)
The drive side roll shafts 8A, 9A and the operation side roll shafts 8B, 9B are slid in the axial direction to sandwich both end surfaces of the forming rolls 10, 11.
You will be bound.

FIG. 2 shows a specific method of roll exchange. This method uses an arm type roll carrying device (hereinafter referred to as arm 20).

When the forming rolls 10 and 11 incorporated in the stands 6 and 7 are taken out, the arm 20 located at the position (1) in the figure can be mounted with the forming rolls 10 and 11 incorporated in the stands 6 and 7 ( The height is lowered to 2), and as shown in (3) in the figure, the arm 20 is inserted between the forming rolls 10 and 11 to support the forming rolls 10 and 11. As shown in FIG. 1 (b), with the forming rolls 10 and 11 supported at (3) in the figure, the drive side roll shafts 8A and 9A and the operation side roll shafts 8B and 9B.
Is slid in the axial direction to release the forming rolls 10 and 11. Next, as shown in (4) in the figure, the arm 20 is raised, the forming rolls 10 and 11 are discharged from the stands 6 and 7, the arm 20 is moved to the roll storage place, and the forming rolls 10 and 11 are exchanged. .

When assembling the forming rolls 10 and 11 into the stands 6 and 7,
The arm 20 on which the forming rolls 10 and 11 are placed is lowered from the position (4) in the figure to a predetermined position on the roll shaft center of the roll shafts 8A, 8B, 9A and 9B (3) in the drawing. Set as shown in. In the state of (3) in the figure, as shown in FIG. 1 (a),
The drive-side roll shafts 8A and 9A and the operation-side roll shafts 8B and 9B are slid in the axial direction to sandwich the forming rolls 10 and 11. Next, the arm 20 is moved in the order of (2) to (1) in the figure.

FIG. 3 shows a concrete method of roll exchange by a clamp type roll conveying device (hereinafter referred to as a clamp arm 30).

When taking out the forming rolls 10 and 11 assembled in the stands 6 and 7, the clamp arm 30 at the position (1) in the drawing is used.
Is lowered to a height at which the forming rolls 10 and 11 can be clamped, and then, as shown in (3) in the figure,
Clamp the forming rolls 10 and 11. With the forming rolls 10 and 11 clamped at (3) in the figure, as shown in FIG. 1 (b), the drive side roll shafts 8A and 9A and the operation side roll shafts 8B and 9B
Is slid in the axial direction to release the forming rolls 10 and 11.
Next, the clamp arm 30 is raised as shown in (4) in the figure, and the forming rolls 10 and 11 are taken out from the stands 6 and 7.
Move the clamp arm 30 to the roll storage area
Replace 10 and 11.

When assembling the forming rolls 10 and 11 into the stands 6 and 7,
Contrary to the above procedure, (4), (3), (2),
The operation may be performed in the order of (1).

By performing roll exchange using the method shown in FIG. 2 or 3, roll exchange time can be greatly reduced.

In the practice of the present invention, in order to strengthen the binding of the joint between the forming rolls 10 and 11 and the roll shafts 8A, 8B, 9A and 9B, as shown in FIGS. The end surface and the end portions of the roll shafts 8A, 8B, 9A, 9B have a concave-convex fitting structure, and in order to prevent slipping of the forming rolls 10 and 11, as shown in FIG. A key groove is provided in the fitting portion of the end surface of 11 and the roll shafts 8A, 8B, 9A, 9B, or
Alternatively, as shown in FIG. 5 (b), it is preferable that the end faces of the forming rolls 10 and 11 and the roll shafts 8A, 8B, 9A and 9B are fitted in a polygonal cross section. Forming rolls 10 and 11 and roll shaft 8A,
The fitting accuracy of 8B, 9A and 9B is required to be + 0.2mm or less. In addition, drive side roll shafts 8A, 9A and operation side roll shafts 8B, 9B
It is required that the deviation of the roll shaft core heights that are opposite to each other be ± 0.1 mm or less. The material of the forming rolls 10 and 11 is equivalent to SKD11. The material of the roll shafts 8A, 8B, 9A, 9B is S45C equivalent or low alloy material.

FIG. 6 shows a comparison of the forming roll diameter for the same product size by the conventional structure and the structure of the present invention. Since the forming roll of the present invention does not penetrate the roll shaft, the roll throat diameter a is smaller than the roll throat diameter a0 of the conventional structure, and as a result, the roll flange diameter b is smaller than the roll flange diameter b0 of the conventional structure. The forming roll having the structure of the present invention can be made smaller than the forming roll having the conventional structure, and the roll manufacturing cost can be reduced. Further, since the forming roll can be made small, the forming stand becomes compact.

[Embodiment] (First Embodiment) In the roll forming apparatus 40 shown in FIG. 7, the operating side stand 7 can be slid in the roll axial direction by a hydraulic device 41. Moreover, the operating side stand 7 can be clamped to the bed 12 by the hydraulic device 42.

FIG. 7 shows the forming rolls 10 and 11 assembled in the stands 6 and 7. However, when replacing the forming rolls 10 and 11, the clamp of the stand 7 by the hydraulic device 42 is released, By moving the stand 7 to the operating side by the hydraulic device 41, the forming rolls 10 and 11 are released from the roll shafts 8A and 8B, 9A and 9B and can be taken out.

When assembling the forming rolls 10 and 11 into the stands 6 and 7, set the forming rolls 10 and 11 at predetermined positions on the roll shaft cores of the roll shafts 8A and 8B and 9A and 9B. The stand 41 is moved to the drive side by the device 41, and the forming rolls 10 and 11 are sandwiched by the roll shafts 8A and 8B, 9A and 9B, and then the hydraulic device.
The stand 7 is clamped by 42 and the forming rolls 10 and 11 are set.

When the material is roll-formed by using the roll-forming device 40 of the first embodiment, no problems are found in the forming characteristics such as roll flaws, edge waves, and insufficient bending, and the conventional forming stand shown in FIG. It was found that the material can be roll-formed with the same precision.

(Second Embodiment) In the roll forming apparatus 50 shown in FIG. 8, hydraulic devices 51 and 52 are incorporated in the upper and lower chocks 13 of the operating side stand 7, and the hydraulic devices 51 and 52 are used to control the operating side. Roll axis 8B, 9B
Can be slid in the axial direction.

FIG. 8 shows the forming rolls 10 and 11 assembled in the stands 6 and 7. However, when the forming rolls 10 and 11 are replaced, the roll shafts 8B and 9B are moved by the hydraulic devices 51 and 52. To the operating side and move the forming rolls 10 and 11 to the roll shafts 8A and 8B,
Release from 9A and 9B and remove.

Further, when the forming rolls 10 and 11 are incorporated into the stands 6 and 7, the forming rolls 10 and 11 are set at predetermined positions on the roll shaft cores of the roll shafts 8A and 8B and 9A and 9B, respectively. Device 5
The roll shafts 8B and 9B are moved to the driving side by the rollers 1 and 52, the forming rolls 10 and 11 are sandwiched, and the forming rolls 10 and 11 are set.

Even in the roll forming apparatus 50 of the second embodiment, the forming characteristics are good as in the forming roll apparatus 40 of the first embodiment, and the roll forming of the material can be performed with the same accuracy as the conventional forming stand. Was recognized.

[Advantages of the Invention] As described above, according to the present invention, the two drive-side and operation-side roll shafts are relatively moved in the axial direction so that both end surfaces of the forming roll can be pressed and released. As a result, the roll replacement work can be easily performed in a single time, the downtime of the pipe making function for the roll replacement work can be shortened, and the operating rate of the pipe making machine can be greatly improved.
Also, large-scale capital investment is no longer necessary.

The present invention can be applied not only to forming roll devices for electric resistance welded steel pipes, TIG welded steel pipes, etc., but also to other forming roll devices.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of a detaching method of a forming roll device of the present invention, FIG. 2 is a schematic diagram showing a roll replacing method using the forming roll device of the present invention, and FIG. 3 is a forming roll device of the present invention. Fig. 4 is a schematic diagram showing another roll exchange method using the, Fig. 4 is a schematic diagram showing a fitting structure of a forming roll and a roll shaft,
FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, and FIG. 6 is a schematic view showing the state of connection between the forming roll and the roll shaft in the conventional structure and the structure of the present invention, respectively, and FIG. Is a schematic diagram showing a forming roll device according to a first embodiment of the present invention, FIG. 8 is a schematic diagram showing a forming roll device according to a second embodiment of the present invention, and FIG. 9 is a welding steel pipe production line. Layout diagram, FIG. 10 is a schematic diagram showing a roll exchanging structure of a conventional forming roll device, FIG. 11 is a schematic diagram showing another roll exchanging structure of a conventional forming roll device, and FIG. 12 is a conventional forming roll device. It is a schematic diagram which shows. 6 …… Drive side stand, 7 …… Operating side stand, 8A, 9A …… Drive side roll shaft, 8B, 9B …… Operating side roll shaft, 10,11 …… Molding roll, 40 …… Roll forming device, 50 ...... Roll forming device.

Claims (1)

[Claims] 1. A forming roll apparatus constituted by supporting a forming roll on a roll shaft supported by a driving side stand and an operating side stand, wherein the roll shaft is divided into a driving side roll shaft and an operating side roll shaft. At least one of the drive-side roll shaft and the operation-side roll shaft is movable in the axial direction, and the opposite roll-supporting end portions of the drive-side roll shaft and the operation-side roll shaft clamp both end surfaces of the forming roll. A forming roll device supporting the forming roll.