JPH0732014A - Roll width adjustment device - Google Patents

Abstract

(57) [Summary] [Objective] To provide a roll width adjusting device having a sufficient roll width adjusting amount at a low cost. [Configuration] On the outer circumference of the roll shaft supported by roll bearings,
Hollow shafts fitted with roll sleeves are fitted axially movably with respect to the roll shafts at axially symmetrical positions with respect to the center of the line, and rotational directions are connected by a slide key. Install a hydraulic cylinder inside the hollow shaft so that the rod faces the line center and is axially symmetric with respect to the line center.
Flange the rod end. Furthermore, a read head of a magnescale is installed inside the hollow shaft, a magnescale rod is installed so as to follow the flange of the hydraulic cylinder end, and position control is performed so that the stroke of the hydraulic cylinder is constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll width adjusting device capable of arbitrarily adjusting the width of a horizontal roll.

[0002]

2. Description of the Related Art In rolling H-section steel, H of different sizes is used.
In order to roll the shaped steel, it is necessary to change the width of the horizontal roll of the universal mill or the edging mill, and conventionally, a roll corresponding to the dimension of the H-shaped steel to be rolled was prepared and rolled. However, such a method has a drawback in that the number of rolls to be prepared is large, and it is necessary to change each rolling size, which requires a great amount of time for changing.

Therefore, in order to reduce the number of roll preparations,
Conventionally, roll width adjusting devices having various structures have been proposed.

For example, in Japanese Unexamined Patent Publication No. 62-156007, a roll shaft is divided into a solid shaft and a hollow shaft, each roll shaft is fitted so as to be movable in the axial direction, and the rotation direction is connected by a slide key. In addition, there is disclosed a roll width adjusting device in which a roll width adjusting screw is provided at the bearing outer end of the hollow shaft so as to be able to be pressed against the bearing outer shaft end of the solid shaft.

Further, Japanese Patent Laid-Open No. 61-17310 discloses that
The roll shaft is divided into a solid shaft and a hollow shaft, each roll shaft is fitted so as to be movable in the axial direction, and the rotation direction is connected by a slide key. There has been proposed a roll width adjusting device in which a roll width adjusting hydraulic cylinder is provided between the bearing outer shaft ends.

Further, in Japanese Unexamined Patent Publication No. 62-176604, two roll sleeves are fitted to a roll shaft, one roll sleeve is movably in the axial direction, and the rotation direction is connected by a slide key.
A roll width adjusting device is disclosed in which the other is fixedly fitted in both the axial and rotational directions and a roll width adjusting screw is provided between the roll sleeves.

In Japanese Utility Model Laid-Open No. 4-108902,
A hollow shaft is fitted to the outer circumference of the roll shaft so that it can move in the axial direction.
A roll width adjusting device is disclosed in which the rotation direction is connected by a slide key and a roll width adjusting screw is provided between a hollow shaft and a roll shaft at a bearing inner neck portion of the roll shaft.

Further, in Japanese Patent Laid-Open No. 61-9906,
Two roll sleeves are tightly fitted to the roll shaft, a passage for introducing high pressure fluid is provided on the fitting surface of the roll shaft and each sleeve portion, and normally the rolling torque is obtained by the tight fit between the roll shaft and each sleeve portion. When the roll width is adjusted, the high-pressure fluid is introduced into the high-pressure fluid introduction passage, the fitting between the roll shaft and each sleeve part is released, and the roll width adjustment device provided between the two sleeves adjusts the roll width. A roll width adjusting device is disclosed.

[0009]

Thus, although roll width adjusting devices of various structures have been proposed, none of them can be said to have sufficient functions and effects at present. Remaining.

For example, Japanese Unexamined Patent Application Publication No. Sho 6-96 mentioned in the section of the prior art.
In the 2-156007 publication, since the roll width adjusting device is provided outside the roll bearing, the total length of the roll becomes long,
Furthermore, since the axial length of the hollow roll shaft that requires highly accurate machining on both the inner surface and the outer surface becomes long, the equipment cost tends to increase.

Also, in the case of Japanese Patent Laid-Open No. 61-17310, the axial length of the hollow roll shaft, which requires highly accurate machining on both the inner surface and the outer surface, becomes long and the equipment cost becomes high.

Further, in the one disclosed in Japanese Patent Laid-Open No. 62-176604, since the roll width adjusting screw is provided between the roll sleeves, the minimum roll width that can be adjusted tends to be large, and the web height is low. Dimensional restrictions on the material to be rolled become large, such as the inability to manufacture shaped steel.

In Japanese Utility Model Laid-Open No. 4-108902, since the roll width adjusting screw is provided at the bearing inner neck portion of the roll shaft, the maximum roll width that can be adjusted tends to be small, and the height of the web is high. Dimensional restrictions on the material to be rolled become large, such as the inability to manufacture shaped steel.

Also, in the case of Japanese Unexamined Patent Publication No. 61-9905, since the roll width adjusting device is provided between the roll sleeves, the minimum roll width that can be adjusted tends to be large, and the material to be rolled is large. Dimensional restrictions become large, and the fitting between the roll sleeve and the roll shaft is released by high-pressure fluid when adjusting the roll width, which requires a high-pressure fluid generator and its introduction path, which increases equipment costs. In addition, the torque that can be transmitted between the roll sleeve and the roll shaft is limited to the range in which the inner diameter of the roll sleeve can be expanded by the high-pressure fluid, and the restriction on the rolling torque tends to increase.

As described above, it cannot be said that any of the technologies still has sufficient functions and effects in terms of dimensional restrictions of rolled material and equipment cost.

An object to be solved in the present invention is to provide a roll width adjusting device having a sufficient roll width adjusting amount at a low cost.

[0017]

SUMMARY OF THE INVENTION According to the present invention, a hollow shaft is fitted to a roll shaft so as to be movable in the axial direction, and the rotation direction is connected by a slide key. A hydraulic cylinder for roll width adjustment is provided in the hollow shaft.

[0018]

[Operation] Since the roll width adjustment actuator is installed near the fitting part of the roll shaft and the hollow shaft, the total length of the roll is the same as that of an integrated roll, and the shaft length of the hollow shaft, which requires high-precision machining, is short. Therefore, the equipment cost is low. Further, between each hollow shaft, since there is no complicated roll width adjusting device between the hollow shaft and the roll bearing, there are few restrictions on the minimum roll width and the maximum roll width that can be adjusted, and as a result,
A large amount of roll width adjustment can be taken.

[0019]

FIG. 1 is a diagram showing an example of an embodiment of the present invention. The roll shaft 1 is a solid roll similar to the arbor shaft of an integral roll, and is supported by roll bearings 2a and 2b. on the other hand,
Hollow shafts 3a and 3b are fitted around the outer periphery of the roll shaft 1 at axially symmetric positions with respect to the line center so as to be movable in the axial direction with respect to the roll shaft 1.
Connect at 4b. Roll sleeves 5a and 5b, which are in direct contact with the material to be rolled, are fitted around the outer circumferences of the hollow shafts 3a and 3b. Further, inside the hollow shafts 3a and 3b, the hydraulic cylinder 6 is arranged such that the rod sides of the piston rods 6a and 6b face the line center and are axially symmetric with respect to the line center. It is installed so as to be connected by the flanges 7a and 7b provided on the rod end. Further, read heads 8a, 8b are fixed to the hollow shaft side at one location outside the hydraulic cylinder 6 inside the hollow shafts 3a, 3b, and the magnescale rods 9a, 9b are so arranged as to follow the flange ends of the hydraulic cylinder rods. Set up. The stroke of each hydraulic cylinder 6 is a magnet scale 8
a, 9a, 8b, 9b, and position control is performed so that the stroke is constant.

In normal times, the horizontal rolling reaction force passes from the roll sleeves 5a, 5b through the hollow shafts 3a, 3b to the hollow shafts 3a, 3b.
It is transmitted from the roll shaft 1 to the roll bearings 2a and 2b and further to the bearing housings 10a and 10b through the fitting surface between the roll shaft 1 and 3b. As for the axial rolling reaction force, the horizontal rolling reaction force passes from the roll sleeves 5a, 5b through the hollow shafts 3a, 3b, and the hollow shafts 3a, 3b and the hydraulic cylinder / piston rods 6a, 6b.
b through the pressure liquid between the piston rods 6a, 6b
To pass through the contact surfaces of the rod end flange sleeves 7a and 7b to form a loop. The rolling torque is transmitted from the roll shaft 1 to the hollow shafts 3a and 3b and the roll sleeves 5a and 5b through the slide keys 4a and 4b between the roll shaft 1 and the hollow shafts 3a and 3b. At this time, since the position control is performed so that the stroke of each hydraulic cylinder 6 becomes constant, the roll width is kept constant.

When adjusting the roll width, the position command value of the stroke of each hydraulic cylinder 6 is set to a value corresponding to the roll width to be set, and constant position control is performed. At this time, in the hydraulic cylinder 6, the rod sides of the piston rods 6a and 6b face the line center and are axially symmetrical with respect to the line center, and the piston rods 6a and 6b are provided with flanges 7a, which are provided at the rod ends. Since they are installed so as to be connected at 7b, if the position command values of the respective cylinders are made the same, the roll width can be adjusted evenly distributed to the center of the line.

In the above embodiment, the roll sleeves 5 that are in direct contact with the material to be rolled are provided on the outer circumferences of the hollow shafts 3a and 3b in order to reduce the running cost by cutting the rolls.
Although the method of fitting a and 5b is shown, the hollow shafts 3a and 3b
Even if the roll sleeves 5a and 5b are integrated,
There is no difference in carrying out the present invention.

[0023]

According to the present invention, the hollow shaft is fitted to the roll shaft so as to be movable in the axial direction, and the rotation direction is connected by the slide key. Since a hydraulic cylinder for roll width adjustment is provided, the total length of the roll is the same as that of an integral roll, and the hollow shaft, which requires high-precision machining, has a short shaft length, so the equipment cost is low. Further, between each hollow shaft, since there is no complicated roll width adjusting device between the hollow shaft and the roll bearing, there are few restrictions on the minimum roll width and the maximum roll width that can be adjusted,
As a result, the roll width adjustment amount can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a roll width adjusting device of the present invention.

FIGS. 2 (a) and 2 (b) are roll width adjusting devices of the prior art, in which the roll shaft is divided into a solid shaft and a hollow shaft, and the respective roll shafts are fitted so as to be movable in the axial direction and rotated. FIG. 6 is an explanatory view of a structure in which the directions are connected by a slide key, and a roll width adjusting screw is provided at a bearing outer end portion of a hollow shaft so as to be capable of pressing the bearing outer shaft end of a solid shaft.

FIG. 3 is a roll width adjusting device of the prior art, in which the roll shaft is divided into a solid shaft and a hollow shaft, and the respective roll shafts are fitted so as to be movable in the axial direction, and the rotation direction is connected by a slide key. FIG. 3 is an explanatory diagram of a roll width adjusting hydraulic cylinder provided between a bearing outer end of a hollow shaft and a bearing outer end of a solid shaft.

FIG. 4 is a roll width adjusting device of the prior art, in which two roll sleeves are fitted so as to be movable in the axial direction, the rotational direction is connected by a slide key, and the other one is axially mounted on the roll shaft. Explanatory drawing of what was equipped with the roll width adjustment screw between each roll sleeve while being fixedly fitted in both rotation directions.

FIG. 5 is a roll width adjusting device of the prior art, in which a hollow shaft is fitted to the outer periphery of the roll shaft so as to be movable in the axial direction, the rotation direction is connected by a slide key, and a neck portion inside the bearing of the roll shaft is used. Explanatory drawing of what provided the roll width adjustment screw between the hollow shaft and the roll shaft.

FIG. 6 is a roll width adjusting device of a conventional technique,
Two roll sleeves are tightly fitted, a passage for introducing high pressure fluid is provided in the fitting surface of the roll shaft and each sleeve portion, and normally the rolling torque is transmitted by the tight fit between the roll shaft and each sleeve portion. At the time of width adjustment, high-pressure fluid is introduced into the high-pressure fluid introduction passage, the fitting between the roll shaft and each sleeve part is released, and the roll width is adjusted by the roll width adjusting screw provided between the two sleeves. .

FIG. 7 is a roll width adjusting device according to the related art,
Two roll sleeves are tightly fitted, a passage for introducing high pressure fluid is provided in the fitting surface of the roll shaft and each sleeve portion, and normally the rolling torque is transmitted by the tight fit between the roll shaft and each sleeve portion. FIG. 6 is an explanatory view of a case in which a high-pressure fluid is introduced into a high-pressure fluid introduction passage at the time of width adjustment, the roll shaft and each sleeve portion are disengaged, and a roll width is adjusted by a hydraulic cylinder provided between the two sleeves.

[Explanation of symbols]

1 ... Roll shafts 2a, 2b ...
Roll bearings 3a, 3b ... Hollow shafts 4a, 4b ...
Sliding key 5a, 5b ... Roll sleeve 6 ... Hydraulic cylinder 6a, 6b ... Hydraulic cylinder / rod 7a, 7b ... Hydraulic cylinder / Rod tip flange 8a, 8b ... Magnescale / reading head 9a, 9b ... Magnescale rod 10a, 10
b ... Bearing box

Claims (1)

[Claims] 1. A roll shaft is fitted with a hollow shaft so as to be movable in the axial direction, the rotation direction is connected by a slide key, and the roll width is adjusted in the hollow shaft near the fitting part of the roll shaft and the hollow shaft. A roll width adjusting device comprising a hydraulic cylinder.