JPH0810426Y2 - Roll width adjustment device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roll width adjusting device for adjusting a roll width in rolling H-section steel or the like.

2. Description of the Related Art Conventionally, in rolling H-section steel, a roll width adjusting device for moving rolling rolls divided in two in the axial direction toward and away from each other in order to cope with H-section steels having different dimensions is disclosed in Japanese Patent Laid-Open No. 60-726.
It is disclosed in Japanese Patent Laid-Open No. 03 and Japanese Patent Laid-Open No. 62-156007. These are such that at least one of the bisected rolls is fitted onto the roll shaft so as to be movable in the axial direction, and a screw or gear mechanism is provided at the end of the roll located outside the roll chock (opposite to the roll). To move the roll or the hollow roll in the axial direction.

However, according to the above configuration, since the adjusting drive unit for adjusting the width of the roll is disposed outside the roll chock, the roll neck or the roll for moving the roll by the drive unit is provided. The sleeve to which is fixed is externally fitted on the roll shaft, and this is present in the roll chock portion. Therefore, the roll neck bearing supports the roll shaft via the roll neck or sleeve. As a result, the roll neck bearing becomes larger in size, so that the roll diameter, roll chock, housing, etc. become larger, and there is a problem that the equipment cost increases significantly.

An object of the present invention is to solve the above-mentioned problems and to provide a roll width adjusting device which does not require the roll neck bearing and the like to be upsized and can reduce the equipment cost.

Means for Solving the Problems In order to solve the above problems, the present invention provides a roll shaft rotatably supported by a roll chock via a roll neck bearing, and a roll divided into two in the width direction. In a roll width adjusting device that adjusts the roll width by moving at least one of the rolls along the roll axis, an operation adjusting unit that moves the roll to the roll side with a roll chock interposed is provided, and the operation is performed on the opposite side of the roll. An adjustment drive unit for driving the adjustment unit is provided, and an operation shaft for interlockingly connecting the operation adjustment unit and the adjustment drive unit is disposed through the roll chock outside the roll neck bearing, and the adjustment drive unit is provided with the operation shaft. And a means for disconnecting the rotation of the output shaft between the output shaft and the operating pinion of the adjustment rotation driving device. A sleeve in which the roll is externally fitted to the roll shaft so as to be movable only in the axial direction of the roll shaft, and the roll is externally fitted and fixed to the operation adjusting portion, and a male screw portion for feeding formed on the roll chock side of the sleeve.
An operating ring, which is externally rotatably fitted to a roll shaft and formed with a female thread portion for feeding that is screwed to the male thread portion for feeding, and an operating ring attached to the operating shaft and formed on an outer peripheral portion of the operating ring. And an operating pinion that meshes with the bearing gear and rotates the operating ring.

Action In the above configuration, when adjusting the roll width, the adjustment drive force of the adjustment drive unit is connected from the disconnected state by the connection disconnection means, and the adjustment rotation drive device is rotationally driven to rotate the operating shaft penetrating the roll chock, The drive pinion of the operation adjustment unit rotates the operation ring via the passive gear, and the action of both feed screw portions moves the roll in the axial direction via the sleeve to adjust the roll width. Therefore, the roll neck bearing need only directly support the roll shaft, and it is not necessary to upsize the roll neck bearing.

Embodiment An embodiment of the roll width adjusting device according to the present invention will be described below with reference to the drawings.

1 is an upper horizontal roll 2 and a lower horizontal roll 3 in the rolling mill
In the H-shaped steel roll-formed by and, the upper horizontal roll 2 and the lower horizontal roll 3 have the same structure, and only the lower horizontal roll 3 will be described.

The lower horizontal roll 3 is provided with a pair of left and right lower rolls 4A and 4B divided into two in the width direction, and roll width adjusting devices 5A and 5B having the same structure are respectively arranged in the lower rolls 4A and 4B in symmetrical directions. The two lower rolls 4A and 4B are moved toward and away from each other in the axial center A direction so that the roll width can be adjusted according to the H-shaped steel 1 to be rolled.

This roll width adjusting device 5A, 5B is a roll chock 10A, 1
Roller chocks 10A and 10B, and an operation adjustment unit D that moves the lower rolls 4A and 4B to the lower rolls 4A and 4B with the 0B interposed therebetween.
On the opposite side of the lower rolls 4A, 4B, an adjustment drive unit E for driving the operation adjustment unit D, and operation shafts 21A, 21B interlockingly connected to the operation adjustment unit D and the adjustment drive unit E are provided. 21B is roll chock 10A, 10B outside the roll neck bearing 9A, 9B
Is arranged so as to penetrate through.

That is, in the operation adjusting section D, the lower rolls 4A, 4B are fitted onto the sleeves 6A, 6B by shrink fitting, keys, or splines, and the sleeves 6A, 6B are attached to the roll shaft 7 by the keys 8A, 8B (or splines). ) Is movably fitted only in the axial direction. The outer ends of these sleeves 6A and 6B are lower rolls 4A and 4B.
And the roll shaft 7 is rotatably supported via roll neck bearings 9A, 9B to the intermediate position of the roll chocks 10A, 10B, and the sleeves 6A, 6B have lower rolls 4A, 4B on the outer periphery for fixing the rolls. With the screw portions 11A and 11B being formed,
Male thread portions 12A and 12B for feeding are formed on the outer circumference of the outer end portion side.
The roll fixing male threads 11A and 11B have fixing nuts 13A and 1B.
3B is screwed on. Actuating rings 15A and 15B are rotatably fitted on the step portions 14A and 14B formed on the roll shaft 7 outside the sleeves 6A and 6B.
And the regulation groove 16 formed on the roll shaft 7 outside the stepped portions 14A and 14B
Movement in the axial center A direction is restricted by the split rings 17A and 17B fitted to the A and 16B. The actuating rings 15A and 15B include a ring body 15a fitted on the stepped portions 14A and 14B and sleeves 6A and 6B.
Is formed on the outer peripheral surface of the ring main body 15a. Is the passive gear 19A,
19B is formed all around. 20A and 20B are scale covers attached between the fixing nuts 13A and 13B and the sleeves 6A and 6B.

The working shafts 21A and 21B are arranged in through holes 22A and 22B which are formed in the roll chocks 10A and 10B near the positions where the roll neck bearings 9A and 9B are mounted, in parallel with the shaft center A. It is supported rotatably and freely in the directions of arrows B and C along the direction.

The adjustment drive unit E includes the passive gears 19A, 1B of the operating rings 15A, 15B at the inner ends of the operating shafts 20A, 20B protruding toward the lower rolls 4A, 4B.
The operation pinions 23A and 23B that can be meshed with the 9B are fixed, and the outer ends of the roll chock 10A and 10B projecting outward are interlockingly connected via gears to the speed reducers 24A and 24B arranged outside the roll chock 10A and 10B. To be done. The input shafts of the speed reducers 24A and 24B are connected to an adjustment drive motor (not shown) via flexible shafts 25A and 25B. Further, the outer ends of the operating shafts 21A and 21B are connected to the piston rod 27a of the moving cylinders (an example of connection breaking means) 27A and 27B, which are mounted on the speed reducers 24A and 24B via the mounting members 26A and 26B, and a joint 28A. , 28B and the operating pinions 23A, 23B are shown in solid line (a)
Can be moved between the disengagement position (b) indicated by the virtual line.

 Next, the operation of the roll width adjusting devices 5A and 5B will be described.

When changing the dimensions of the H-section steel 1 to be rolled, in the state before the rolling, the retracting cylinders 27A, 27B of the adjusting drive unit E are extended to move the operating pinions 23A, 23B at the separated position (B). Arrow C to the connecting position (a) that meshes with the passive gears 19A and 19B
Move in the direction. Then, the adjustment drive motor is driven to rotate the operating shafts 21A and 21B forward or reverse through the speed reducers 24A and 24B. Then, the operation rings 15A, 15B are rotated by the operation pinions 23A, 23B and the passive gears 19A, 19B of the operation adjusting section D. Then, the sleeves 6A and 6B are slid in the arrow B direction or the arrow C direction by the action of the feed female threads 18A and 18B and the feed male thread portions 12A and 12B to move the lower rolls 4A and 4B close to and away from each other. Then, the roll width W can be adjusted.
After the adjustment, the retracting cylinders 27A and 27B are contracted to return the operating pinions 23A and 23B to the separated position (b).

 Adjust the roll width of the upper horizontal roll in the same manner.

According to the above-described embodiment, the adjustment drive force of the adjustment drive section E is transmitted to the operation adjustment section D by the operation shafts 21A and 21B penetrating the roll chocks 10A and 10B, and the operation pinions 23A and 23B and the passive gears 19A and 19B. Since the actuating rings 15A, 15B are rotated via the and the lower rolls 4A, 4B are moved toward and away from each other by the screw mechanism, the roll shaft 7 can be directly supported by the roll neck shafts 9A, 9B. Therefore, there is no need to upsize the roll neck bearings 9A and 9B as in the conventional case, and there is no fear of increasing equipment costs.

In the above embodiment, the output / return cylinders 27A, 27B were used as means for disconnecting the power transmission to the operating rings 15A, 15B, but the input shafts of the speed reducers 24A, 24B and the output shaft of the adjustment drive motor are An electromagnetic clutch may be interposed between the shafts and the operating shafts 21A and 21B.

As described above, according to the present invention, the adjustment driving force of the adjustment driving unit provided on the opposite side of the roll of the roll chock is applied to the roll side of the roll chock by the operation shaft that penetrates the roll chock near the roll neck bearing. Since it is configured to be transmitted to and driven by the provided operation adjusting portion, the roll shaft can be directly supported by the roll neck bearing. Therefore, unlike the conventional case, the roll shaft is not supported by the roll neck bearing through the roll neck portion or sleeve, so that it is not necessary to upsize the roll neck bearing, and the roll diameter, roll chock, housing, etc. There is no need for modeling, and equipment costs can be reduced.

[Brief description of drawings]

FIG. 1 is a half sectional view of a lower horizontal roll showing an embodiment of the present invention. A: roll axis, D: operation adjustment part, E: adjustment drive part, 1 ... H-shaped steel, 2 ... upper horizontal roll, 3 ... lower horizontal roll, 4A, 4B ... lower roll, 5A, 5B …… Roll width adjusting device, 6A, 6B …… Sleeve, 7 …… Roll shaft, 8A, 8B …… Key, 9A, 9B …… Roll neck bearing, 10A, 10B …… Roll chock, 12A, 12B… … Feed male thread, 15A, 15B …… Actuation ring, 15b …… Cylinder, 17A, 17B …… Split ring, 18A, 18
B: Female thread for feed, 19A, 19B: Passive gear, 21A, 21B
...... Actuating shaft, 22A, 22B ...... Through hole, 23A, 23B ...... Operating pinion, 24A, 24B ...... Reducer, 27A, 27B ......

Claims (1)

[Scope of utility model registration request] 1. A roll shaft rotatably supported by a roll chock via a roll neck bearing is provided with rolls divided into two in the width direction, and at least one of these rolls is moved along the roll axial center. In a roll width adjusting device for adjusting the roll width, an operation adjusting unit for moving the roll is provided on the roll side with the roll chock interposed therebetween, and an adjustment drive unit for driving the operation adjusting unit is provided on the opposite side of the roll for adjusting the operation. And a drive shaft for interlocking with the adjustment drive unit are arranged outside the roll neck bearing through the roll chock, and the adjustment drive unit has an adjusting rotary drive device for rotationally driving the operating shaft, and an adjusting rotary drive. And a means for disconnecting the rotation of the output shaft between the output shaft of the drive unit and the operating pinion, wherein the operation adjusting unit moves only in the axial direction of the roll shaft. A sleeve to which the roll is externally fitted and fixed, a male thread portion for feeding formed on the roll chock side of the sleeve, and a male threaded portion for external rotation only on the roll shaft to be screwed to the male thread portion for feeding. An operating ring formed with a female screw portion for feeding, and an operating pinion that is attached to the operating shaft and meshes with a passive gear formed on the outer peripheral portion of the operating ring to rotate the operating ring. Characteristic roll width adjusting device.