JPH07106371B2 - 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]

(1) JP-A-1-31
In a roll width adjusting mechanism such as 7607, for example, H-shaped steel is not set in the mill center. Therefore, when a roll width adjusting device is installed in a part of tandem mills, the front and rear mills perform rolling based on the mill center. Therefore, it is necessary to change the roll width and to automatically change the mill guide at the same time as the roll width is changed, or to change the set that matches the size. (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, and the clutch A drum 11 is provided on the counter drive side of the screw shaft 18 via a slide key 31. At the same time, the clutch A tube 9 is interposed between the outer circumference of the clutch A drum 11 and the bearing box 8b, and the clutch B is interposed between the inner peripheral surface of the clutch A drum 11 and the bearing box 8b through the bearings 13 and 14. A drum 12 is interposed, a clutch B tube 10 is interposed between the clutch B drum 12 and the clutch A drum 11, and a hydraulic cylinder 25 for axially moving the roll shaft 7 is provided in one bearing box 8a. The other bearing box 8b is provided with a pinion 21 that meshes with a gear 22 of the casing 29 and a motor (may be a hydraulic motor) 20 that rotates the pinion 21. DOO is a roll width adjustment device according to claim. Further, it is desirable that the drive side shaft of the roll shaft 7 is fitted into the spindle coupling 32, and a detector 26 for measuring the moving amount of the screw shaft 18 is provided at the end of the bearing box 8b. In the figure, 1 is a rolled material, 2a and 2b are left and right vertical rolls, 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.

[0006]

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 clutch B tube 10 is released from air, the clutch A tube 9 is supplied with air, and then the mill motor is rotated, the roll shaft 7 is rotated via the spindle coupling 32 and is connected by the slide gear 6b. The hollow shaft 5b and the hollow roll 4b rotate. The clutch A tube 9 expands due to the supply of air, and the bearing box 8b
The clutch A drum 11 is fixed via the roller A, and the clutch A drum 11 and the roll width adjusting screw shaft 18 are integrated by the key 31, so that the roll width adjusting screw shaft 18 is prevented from rotating. 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 with 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, by releasing the air from the clutch A tube 9 and supplying the air to the clutch B tube 10, the rotation stop of the screw shaft 18 is eliminated, and the rolling standby state is set. (C in FIG. 2).

[0008]

As described above, according to the present invention, by providing the rotation preventing mechanism for the roll width adjusting screw shaft and detecting the moving amount of the roll width adjusting screw shaft, stable, quick and accurate operation can be achieved. High roll width adjustment and centering adjustment are possible, and by installing slide bearings on the drive side and the counter drive side, the roll width can be adjusted without the roll tilting. It is possible to expect great effects such as reduction and reduction of roll width adjustment time.

[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 shaft 8a, 8b Bearing box 9 Clutch A tube 10 Clutch B tube 11 Clutch A drum 12 Clutch B drum 13,14 Bearing 16a, 16b Sliding 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

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoji Suda 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture Nippon Steel Co., Ltd., Machinery & Plant Division (72) Inventor Shizuo Kohinata Kimitsu, Kimitsu City, Chiba Prefecture No. 1 Nippon Steel Co., Ltd. Kimitsu Works (56) Reference JP-A-1-317607 (JP, A) JP-A-62-156007 (JP, A) JP-A-5-104113 (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 by means of a screw, a clutch A drum is provided on the opposite drive side of the screw shaft via a slide key, and a clutch A tube is provided between the outer periphery of the clutch A drum and the bearing box. And the clutch B drum is interposed between the inner peripheral surface of the clutch A drum and the bearing box via a bearing, and the clutch B
A clutch B tube is interposed between a drum and a clutch A drum, one bearing box is provided with a hydraulic cylinder for axially moving a roll shaft, and the other bearing box is provided with a pinion and a gear that meshes with a gear of the casing. A roll width adjusting device provided with a motor for rotating the pinion. 2. The drive shaft of the roll shaft is fitted to the spindle coupling, and a detector for measuring the moving amount of the screw shaft is provided at the end of the counter drive bearing box. 1. The roll width adjusting device according to 1.