JPH07106372B2 - Roll width adjustment device - Google Patents

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.

[0002]

2. Description of the Related Art In order to reduce roll rearrangement for rolled materials of different sizes, for example, Japanese Patent Laid-Open No. 1-317607.
There is an issue. This technique operates a hydraulic motor 35 as shown in FIG. 3, and a nut 36 through a reduction gear 34 and a connecting shaft 33.
To rotate. For this reason, the meshing screw rod 3
7, the roll shaft 38 connected thereto moves along the axial direction while sliding on the through hole H of the sleeve roll 39 and the bearing 40. The roll width of the drive-side roll LR fixedly held by the sleeve roll 41 is changed to an expanding direction like the lower horizontal roll 42B.

On the other hand, in the technique of Japanese Patent Laid-Open No. 62-156007, as shown in FIG. 4, the rotational force of the roll width adjusting motor 50a installed on the opposite drive side is transmitted to the screw 56a via the clutch 51a and the screw 56a and the hollow shaft. Since 52a is connected by a screw, the structure is such that the screw 56a moves the roll 53a in the axial direction. In the figure, 54a is a key, and 55 is a roll shaft.

[0004]

[Problems to be Solved by the Invention]

(1) In the roll width adjusting mechanism like Japanese Patent Laid-Open No. 1-317607, for example, the H-shaped steel is not set in the mill center, so when the roll width adjusting device is installed in a part of the tandem arrangement, the front and rear mills are Since the rolling is based on the mill center, it is necessary that the threading positions do not match and that the roll width be changed and the mill guide be automatically changed or the size of the mill guide be changed. (2) In the roll width adjusting mechanism as disclosed in Japanese Patent Laid-Open No. 62-156007, the clutch slides in the axial direction with the member integrated with the screw while transmitting the rotational force, so that the frictional heat generated between the two becomes large. , There is a problem with the durability of the clutch,
Since there is no rotation prevention mechanism for the hollow shaft, stable roll width adjustment is difficult. Further, since the roll width adjusting motor and the motor mount are installed on the non-driving side, the device becomes long in the axial direction, and it becomes necessary to secure a maintenance space when the rolls are reassembled, which deteriorates maintainability. Further, there is a type of rolling mill in which the roll is inclined by the amount of movement of the transfer box of the bearing box, but in this type, the dimensional accuracy of the product deteriorates.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and as shown in FIG. 1, one of the horizontal rolls 4a divided into two in the axial direction. Is fixed to the roll shaft 7 and the other roll 4b is fixed to the drive side end of the hollow shaft 5b fitted to the roll shaft 7 via the slide gear 6b so as to be movable and rotatable in the axial direction. The roll shaft 7 has its driving side slidably supported by the bearing housing 8a by the slide bearing 16a and has a spherical seat 17 (which may be a concave surface) formed on the end face on the side opposite to the driving side, and the hollow shaft 5b has the central portion thereof. Slide bearing 16b
And a screw 19 is provided on the inner peripheral surface of the non-driving side of the bearing box 8b so as to be slidably supported by the bearing box 8b, and the tip end surface is in contact with the spherical seat 17 so that the body portion is screwed with the screw 19. The roll width adjusting screw shaft 18 provided with 18a is screwed into the hollow shaft 5b with the screw 18a, and the outer periphery of the hollow shaft 5b on the non-driving side is pressed by the centering casing 29 via the thrust bearing 24.
9 is provided with a screw 23 and a gear 22 on the outer peripheral surface and is screwed to the inner peripheral surface of the bearing box 8b by the screw 23. The clutch drum 11 is provided on the opposite drive side of the screw shaft 18 via a slide key 31. The bearing box side front meshing type clutch fixed tooth 9a of the clutch drum 11 which meshes with the bearing box side front meshing type clutch moving tooth 9b, the hollow shaft side front meshing type clutch fixed tooth 10a which meshes with the hollow shaft side front meshing type clutch moving tooth 10b. Is provided, and the bearing box 8b
A hydraulic cylinder 33 for moving the front meshing type clutch drum 11 in the axial direction is provided on the outer periphery of the bearing, a hydraulic cylinder 25 for moving the roll shaft 7 in the axial direction is provided in one bearing box 8a, and a bearing cylinder 8b is provided in the other bearing box 8b. Is the casing 29
21 that meshes with the gear 22 of this and this pinion 21
A motor (may be a hydraulic motor) for rotating the motor 20
Is a roll width adjusting device.

Further, the drive side shaft of the roll shaft 7 is fitted into the spindle coupling 32, and the detector 2 for measuring the moving amount of the screw shaft 18 is provided at the end of the bearing box 8b.
It is desirable to provide 6. In the figure, 1 is rolled material, 2a, 2
b is a left and right vertical roll, 3a and 3b are upper horizontal rolls divided into two, 15 is an inner gear, 27 and 28 are bushes,
30 is a ball bearing.

[0007]

The operation when the lower horizontal roll width W is increased and set on the mill center line will be described below with reference to FIG. First, depressurize the hydraulic cylinder 25,
When the hydraulic cylinder 33 is moved forward and the clutch drum 11 is shifted, the bearing box side front meshing type clutch fixed teeth 9a and the moving teeth 9b are meshed with each other, and then the mill motor is rotated, through the spindle coupling 32. The roll shaft 7 rotates, and the hollow shaft 5b and the hollow roll 4b connected by the slide gear 6b rotate.
Bearing mesh side front meshing type clutch fixed tooth 9a and moving tooth 9
The clutch drum 11 is fixed through the bearing box 8b by meshing b, and since the clutch drum 11 and the roll width adjusting screw shaft 18 are integrated with the key 31, the roll width adjusting screw shaft 18 is prevented from rotating. ing. Therefore, by the rotation of the hollow shaft 5b, the roll width adjusting screw shaft 18 pushes the roll shaft 7 toward the spindle via the spherical seat 17, and the amount of movement is detected by the detector 26 and moved by a preset value W. By the way, stop and change of the roll width is completed. (A in FIG. 2).

Next, when the motor 20 is rotated, the center ring adjusting casing 29 rotates via the gear 22 meshing with the pinion 21, and the center ring adjusting casing 29 meshes with the bearing box 8b by the screw 23. , The thrust bearing 24, the hollow shaft 5b, and the roll width adjusting screw shaft 18 move to the work side and are stopped at the point where the roll width variable amount detector 26 detects 1/2 W and then the roll width adjusting screw shaft 18 moves. The clearance between the spherical seat 17 and the spherical seat 17 generated by pressing the ball bearing 30 with the hydraulic cylinder 25 moves the roll shaft 7 until there is no clearance between the roll width adjusting screw shaft 18 and the spherical seat 17, and the centering adjustment is completed. (B in FIG. 2). Finally, the hydraulic cylinder 33 is retracted, and the clutch drum 11 is engaged with the hollow shaft side front meshing type clutch fixed tooth 10.
a front meshing type clutch moving tooth 10 by shifting to a
By engaging with a, the rotation stop of the screw shaft 18 is eliminated and the rolling standby state is entered. (C in FIG. 2).

[0009]

As described above, according to the present invention, the linear movement amount is measured by providing the rotation preventing mechanism for the roll width adjusting screw shaft and directly detecting the movement amount of the roll width adjusting screw shaft. Since there is no rotation error like an encoder and a highly accurate adjustment amount can be obtained, and the roll width adjustment amount and the centering adjustment amount can be measured with one detector, the bearing box circumference is simplified and maintainability is good. Moreover, by providing slide bearings on the drive side and the non-drive side, the roll width can be adjusted without roll inclination, so roll forming with high dimensional accuracy, drastic reduction of roll reassembly time, reduction of roll width adjustment time, etc. A great effect can be expected.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention with a partial cross section.

2 (A), (B) and (C) are sectional views for explaining the operation sequence of the present invention.

FIG. 3 is a sectional view showing an example of a conventional example.

FIG. 4 is a cross-sectional view showing another example of the conventional example.

[Explanation of symbols]

 4a, 4b Roll divided into two in the axial direction 5b Hollow shaft 6b Slide gear 7 Roll shafts 8a, 8b Bearing box 9a Bearing box side front meshing type clutch fixed tooth 9b Bearing box side front meshing type clutch moving tooth 10a Hollow shaft side front Mesh type clutch fixed tooth 10b Hollow shaft side front mesh type clutch moving tooth 11 Clutch drum 13,14 Bearing 16a, 16b Slide bearing 17 Spherical seat 18 Roll width adjusting screw shaft 19,23 Screw 20 Motor 21 Pinion 22 Gear 24 Thrust bearing 25 Hydraulic cylinder 26 Detector 27, 28 Bush 29 Centering adjustment casing 31 Sliding key 32 Universal joint 33 Hydraulic cylinder 34 Arm 35 Bearing

Front page continued (72) Inventor Takeshi Hioki 46-59, Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture Machinery & Plant Division, Nippon Steel Corporation (72) Inventor Makoto Abe 1 Kimitsu, Kimitsu-shi, Chiba New Japan Kimitsu Works, Ltd. (56) References JP-A-1-317607 (JP, A) JP-A-62-156007 (JP, A) JP-A-4-238610 (JP, A) JP-A-3 -210907 (JP, A) JP-A-4-33709 (JP, A)

Claims (2)

[Claims] 1. A horizontal roll, which is divided into two in the axial direction, has one roll fixed to a roll shaft and the other roll fitted to the roll shaft so as to be movable and rotatable in the axial direction via a slide gear. The roll shaft is fixedly mounted on the driving side end of the hollow shaft, the driving side of which is slidably supported by a slide bearing on a bearing box, and a spherical seat is formed on the non-driving side end face. The center part is slidably supported by a bearing box through a slide bearing, and a screw is provided on the inner peripheral surface of the non-driving side, and the tip end surface is abutted against the spherical seat, and is screwed to the body part. A screw shaft for roll width adjustment provided with a screw is screwed to the hollow shaft by the screw, and the outer periphery of the hollow shaft on the non-driving side is pressed by a centering casing via a thrust bearing. Set gear Screwed to the inner peripheral surface of the bearing box with a screw, and a front meshing type clutch drum is provided on the opposite drive side of the screw shaft via a slide key. A front meshing type clutch moving tooth on the bearing box side that meshes with the clutch fixed tooth and a front meshing type on the hollow shaft side that meshes with the clutch fixed tooth.A front meshing type clutch drum on the hollow shaft side that meshes with the clutch fixed tooth is provided. An axially moving hydraulic cylinder is provided, one bearing box is provided with an axially moving hydraulic cylinder for the roll shaft, and the other bearing box is provided with a pinion that meshes with the gear of the casing and a motor that rotates this pinion. A roll width adjusting device provided with. 2. The drive shaft of the roll shaft is fitted to the spindle coupling, and a detector for directly measuring the amount of movement of the screw shaft is provided at the end of the non-drive side bearing housing. Item 1. The roll width adjusting device according to item 1.