JPH04238610A - Device for adjusting width of roll - Google Patents

Abstract

PURPOSE:To stably and speedily adjust the width of roll with high accuracy by providing the detent mechanism at the screw shaft for adjusting the roll width, and detecting the moving quantity of the screw shaft for adjusting roll width. CONSTITUTION:A hydraulic oil cylinder 25 is depressurized, the air of a clutch B tube 10 is bled, and the air is supplied to a clutch A tube 9. A mill motor 20 is rotated, a roll shaft 7 is rotated through a spindle coupling 32, a hollow shaft 5b and a hollow roll 4b are rotated. The clutch A tube 9 locks the clutch A drum 11 through a bearing box 8b by supplying the air, and stops the rotation of a screw shaft 18 for adjusting the roll width. Therefore, the roll shaft 7 is pushed to the spindle side through a spherical seat 17 with the screw shaft 18 for adjusting the roll width by rotating the hollow shaft 5b, and by detecting its moved amount by a detecting unit 26, the roll 4b is stopped at the position where the roll 4b is moved by a prescribed value W. Therefore, the width between the rolls 4a, 4b can be adjusted accurately.

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

[Prior Art] In order to reduce the number of roll changes for rolled materials of different dimensions, for example, Japanese Patent Laid-Open No. 1-317607
There is a number. This technique operates a hydraulic motor 35 as shown in FIG.
Rotate. For this reason, this meshing screw rod 3
7, and the roll shaft 38 connected thereto moves along the axial direction while sliding through the through hole H of the sleeve roll 39 and the bearing 40. The roll width of the drive-side roll LR fixedly held on the sleeve roll 41 is changed in the direction of expansion like the lower horizontal roll 42B.

On the other hand, the technique disclosed in Japanese Patent Application Laid-Open No. 62-156007 transmits the rotational force of a roll width adjusting motor 50a installed on the non-drive side to a screw 56a via a clutch 51a, as shown in FIG. Since the rolls 52a are connected by screws, the roll 53a is moved in the axial direction by the screw 56a. 5 in the diagram
4a is a key, and 55 is a roll shaft.

0004

[Problems to be solved by the invention] (1) JP-A-1-31
With a roll width adjustment mechanism such as 7607, for example, H-shaped steel is not set at the mill center, so if a roll width adjustment device is installed in some mills with a tandem arrangement, the front and rear mills will roll with the mill center as a reference. Therefore, the threading position does not match, and at the same time as changing the roll width, it is necessary to automatically change the mill guide or change the setting to match the size. (2) In a roll width adjustment mechanism such as that disclosed in JP-A-62-156007, the clutch slides in the axial direction with a member integrated with the screw while transmitting rotational force, so 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 adjustment motor and the motor frame are installed on the non-drive side, the device becomes long in the axial direction, and maintenance space is required to be secured when changing the rolls, which deteriorates maintainability. Furthermore, there is also a mill with a rolling structure in which the rolls are tilted by the amount of movement of the receiving box, but in this type, the dimensional accuracy of the product deteriorates.

[0005]

[Means for Solving the Problems] The present invention has been made to solve the problems of the prior art, and as shown in FIG. is fixed to the roll shaft 7, and the other roll 4b is fixed to the drive side end of a hollow shaft 5b fitted to the roll shaft 7 so as to be movable and rotatable in the axial direction via a slide gear 6b. The roll shaft 7 has its drive side supported by a bearing box 8a in a slidable manner by a slide bearing 16a, and has a spherical seat 17 (a concave surface is also acceptable) formed on the end surface on the non-drive side, and the hollow shaft 5b has a central portion thereof. Slide bearing 16b
The screw 19 is slidably supported on the bearing box 8b through the bearing box 8b, and a screw 19 is provided on the inner circumferential surface on the non-drive side, and the tip surface is shaped to abut the spherical seat 17 and is screwed into the body with the screw 19. A roll width adjusting screw shaft 18 provided with a roll width adjustment screw shaft 18a is screwed onto the hollow shaft 5b by the screw 18a, and the outer periphery of the hollow shaft 5b on the non-drive side is held down by a centering casing 29 via a thrust bearing 24.
9 is provided with a screw 23 and a gear 22 on the outer circumferential surface, and is screwed into the inner circumferential surface of the bearing box 8b by the screw 23, and the clutch A drum 11 is provided on the non-drive side of the screw shaft 18 via a sliding key 31. At the same time, a clutch A tube 9 is interposed between the outer circumference of the clutch A drum 11 and the bearing box 8b, and a clutch B is inserted between the inner circumferential surface of the clutch A drum 11 and the bearing box 8b via 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 one bearing box 8a is provided with a hydraulic cylinder 25 for moving the roll shaft 7 in the axial direction. This roll width adjusting device is characterized in that the other bearing box 8b is provided with a pinion 21 that meshes with the gear 22 of the casing 29 and a motor (which may be a hydraulic motor) 20 that rotates the pinion 21. . Further, the driving side shaft of the roll shaft 7 is fitted into the spindle coupling 32, and it is desirable to provide a detector 26 for measuring the amount of movement of the screw shaft 18 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, and 30 is a ball bearing.

[0006]

[Operation] Hereinafter, the operation when increasing the lower horizontal roll width W and setting it on the mill center line will be explained with reference to FIG. First, release pressure from the hydraulic cylinder 25,
When air is released from the clutch B tube 10, air is supplied to the clutch A tube 9, and the mill motor is then rotated, the roll shaft 7 rotates via the spindle coupling 32, and is connected by the slide gear 6b. The hollow shaft 5b and the hollow roll 4b rotate. Clutch A tube 9 is expanded by air supply, and bearing box 8b
Since the clutch A drum 11 and the roll width adjusting screw shaft 18 are integrated with a key 31, the rotation of the roll width adjusting screw shaft 18 is prevented. Therefore, due to 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 the roll width adjustment screw shaft 18 moves by a preset value W. At this point, the process stops and the change of the roll width is completed. (A in Figure 2)
.

Next, when the motor 20 is rotated, the center ring adjustment casing 29 rotates through the gear 22 that is engaged with the pinion 21, and the center ring adjustment casing 29 is engaged with the bearing box 8b by the screw 23. , moves to the work side together with the thrust bearing 24, the hollow shaft 5b, and the roll width adjustment screw shaft 18, is detected by the roll width variable amount detector 26, and stops at the point where it has moved 1/2W, and the roll width adjustment screw shaft 18 moves. The generated gap between the ball bearing 30 and the spherical seat 17 is removed by the hydraulic cylinder 25, and the roll shaft 7 is moved until the gap between the roll width adjustment screw shaft 18 and the spherical seat 17 disappears, and the centering adjustment is completed. (B in Figure 2). Finally, release the air in clutch A tube 9, and
By supplying air to the tube 10, the rotation of the screw shaft 18 is released, and the tube 10 becomes ready for rolling. (C in Figure 2).

[0008]

As explained above, according to the present invention, by providing a rotation prevention mechanism for the roll width adjustment screw shaft and detecting the amount of movement of the roll width adjustment screw shaft, the roll width adjustment screw shaft can be stably, quickly, and accurately. High roll width adjustment and centering adjustment are possible, and by providing slide bearings on the drive side and non-drive side, the roll width can be adjusted without tilting the rolls, resulting in rolling forming with high dimensional accuracy and significantly reducing the time required to reassemble the rolls. Great effects such as reduction in roll width adjustment time can be expected.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an embodiment of the present invention.

FIGS. 2A, 2B, and 2C are cross-sectional views illustrating the operating sequence of the present invention.

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

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

[Explanation of symbols]

4a, 4b Roll 5b divided into two in the axial direction Hollow shaft 6b Slide gear 7 Roll shafts 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 Slide bearing 17 Spherical seat 18 Roll width adjustment 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

Claims (2)

[Claims] Claim 1: One of the horizontal rolls divided into two in the axial direction is fixed to a roll shaft, and the other roll is fitted to the roll shaft via a slide gear so that it can move and rotate in the axial direction. Fixedly installed on the drive side end of the combined hollow shaft,
The roll shaft has its drive side slidably supported by a bearing box by a slide bearing, and a spherical seat is formed on the end surface of the opposite drive side, and the center portion of the hollow shaft is slidably supported by the bearing box via a slide bearing. A roll width adjusting screw shaft is mounted on the hollow shaft, which is supported by a screw shaft and has a screw on its inner circumferential surface on the non-drive side, and has a tip end surface in contact with the spherical seat, and a screw shaft that is screwed into the body to engage with the screw. The outer periphery of the non-drive side of the hollow shaft is held by a centering casing via a thrust bearing, and this casing has screws and gears on its outer periphery, and is screwed into the inner periphery of the bearing box by screws. A clutch A drum is provided on the opposite drive side of the screw shaft via a sliding key, and a clutch A tube is interposed between the outer periphery of the clutch A drum and the bearing box, and the inner peripheral surface of the clutch A drum is A clutch B drum is interposed via a bearing between the clutch B drum and the clutch A drum, and a clutch B tube is interposed between the clutch B drum and the clutch A drum, and the roll shaft is moved in the axial direction in one bearing box. 1. A roll width adjusting device comprising: a hydraulic cylinder for adjusting the width of a roll; the other bearing box being equipped with a pinion that meshes with a gear of the casing; and a motor that rotates the pinion. 2. A drive side shaft of the roll shaft is fitted into a spindle coupling, and a detector for measuring the amount of movement of the screw shaft is provided at an end of the non-drive side bearing box. 1. The roll width adjustment device according to 1.