JP2653535B2 - Roll width adjustment device for variable width split rolls - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roll width adjusting device for a variable width split roll used as a horizontal roll or the like for a universal mill of an H-shaped steel rolling facility.

[Conventional technology]

In a universal mill for rolling an H-section steel, a forging mill for forming a square tube, and the like, it is necessary to change the width of the horizontal roll according to the size of the final product. For this reason, conventionally, rolls having a width corresponding to each size of the rolled material are prepared, and the rolls are rearranged and rolled for each size change.

However, according to this conventional method, the number of rolls to be prepared increases, maintenance and management are troublesome, and a large facility cost is required.
As a result, it takes a considerable amount of time to change the size of each roll, so that a reduction in production efficiency is inevitable. In addition, in recent years, the flow of high-mix low-volume production has demanded a reduction in reassembling time, and it has been necessary to change the roll width online. However, such a request cannot be met.

Therefore, a horizontal roll for a universal mill of a rolled H-section steel rolling facility as shown in FIG. 3 has been developed. This horizontal roll is divided into two in the roll axis direction so that the roll width can be adjusted in accordance with the in-flange distance of the rolled material 25. A drive shaft 26 is fitted into the center of each of the roll splits 1A and 1B, and is locked in the roll rotation direction via a guide mechanism 3 (spline mechanism) provided between the roll splits 1A and 1B. The roll divisions 1A and 1B can approach and separate from each other in the roll axis direction. Roll split bodies 1A, 1B
The roll width can be adjusted by the approach / separation operation of
A drive shaft 26 is provided at each roll shaft end of the roll split bodies 1A and 1B.
The cap nuts 27A and 27B fitted and fixed above are screwed together, and the cap nuts 27A and 27B are rotatable independently of each other via separate gear mechanisms 28A and 28B.

[Problems to be solved by the invention]

When performing the roll width adjustment, it is necessary to rotate the cap nuts 27A, 27B via the gear mechanisms 28A, 28B by the roll width adjustment driving device independently on the roll split body 1A side and the roll split body 1B side, It is difficult to control the amount of movement of the roll divisions 1A and 1B equally, and the center of the roll width may be shifted from the material path center O (mill center). It is difficult to detect the shift amount of the roll width center from the material path center O and the roll width adjustment amount online. Also, on one roll split body 1A (or 1B) side, a roll split body 1
A drive unit (a reduction gear, a motor, etc.) for rotating A and 1B via a drive shaft 26 at the center of the roll shaft, and a roll width adjustment drive unit for moving the one roll split body 1A (or 1B) are provided. It was necessary to do this, but this was inevitably inconvenient in terms of space and maintenance.

[Object of the invention]

The present invention has been made to solve the above problems,
An object of the present invention is to make it possible to quickly adjust the roll width on the operation side while making the center of the roll width coincide with the material path center, and to enable detection of the roll width adjustment amount.

[Means for solving the problem]

A roll width adjusting device for a variable width split roll according to the present invention comprises two roll split bodies 1 as shown in FIG. 1 and FIG.
One of A and 1B is a drive side, and the other is an operation side. An adjustment shaft 2 is fitted into the center of both roll divided bodies 1A and 1B from the operation side, and screw portions formed on the opposite shafts of the adjustment shaft 2 are opposite to each other. 8
a, 8b, screw parts 9A, 9B provided at the center of both roll divided bodies 1A, 1B are screwed respectively, and roll divided bodies 1A, 1B
The split rolls 1A and 1B are provided so as to be able to approach and separate from each other in the roll axis direction by being locked in the roll rotation direction via a guide mechanism 3 provided therebetween, and the operation-side split roll 1A is provided on the adjustment shaft 2. The driven body 12 facing the roll shaft end 4A is fitted and fixed, and the adjustment shaft 2 can be moved only in the axial direction between the driven body 12 and the roll shaft end 4A of the operation side roll split body 1A. A clutch 24a, 24b is provided between the clutch shaft 20 and the driven body 12, and between the clutch shaft 20 and the roll shaft end 4A of the operation-side roll split body 1A. A clutch switching drive device (in the embodiment, the fluid pressure cylinder 22) that is capable of moving one 20 to engage one clutch 24a (24b) and disengaging the other clutch 24b (24a).
And a roll width adjusting drive device 14 for rotating the driven body 12, and the above-mentioned object is achieved by this configuration.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

In the drawing, reference numeral 1A denotes an operation-side roll split body, and 1B denotes a drive-side roll split body, and an adjustment shaft 2 is rotatably fitted into the center of both roll split bodies 1A and 1B from the operation side.

These roll split bodies 1A and 1B are mutually locked in the roll rotation direction via a guide mechanism 3 (spline mechanism in the embodiment) provided between them, and are combined concentrically, and milled via respective roll shafts 4A and 4B. It is supported by chocks 6A, 6B provided on the post 5 of the housing. Both chock 6
A and 6B are connected by a tie rod 6 'at a position away from the outer periphery of the roll split bodies 1A and 1B. Then, the roll split bodies 1A and 1B can be simultaneously rotated by the driving device 7 (only the universal spindle is shown) via the roll shaft 4B of the driving roll split body 1B. Further, screw portions 9A and 9B provided at the center of the roll split bodies 1A and 1B are screwed to screw portions 8a and 8b of the opposite screws provided on the adjustment shaft 2, respectively.
Rolled body 1 via guide mechanism 3 by forward and reverse rotation of
A and 1B can approach and separate from each other in the roll axis direction.

Reference numeral 10 denotes a thrust bearing, which is mounted on a mounting frame 11 provided on the post 5 and supports an operation-side end of the adjusting shaft 2.

Reference numeral 12 denotes a gear of the driven body, and a bearing is provided on the operation side end of the adjustment shaft 2.
It is fitted immovably in the axial direction via 13 and is fixed to face the roll shaft end 4A of the operation side roll split body 1A.

Reference numeral 14 denotes a roll width adjusting driving device, which includes a driving gear 15 meshed with the driven gear 12, and a motor 16 connected to the driving gear 15, and is mounted on the mounting frame 11.

Reference numeral 17 denotes a roll width detecting device, which includes a detecting gear 18 meshed with the driven body 13 and a detector 19 connected to the detecting gear 18, and is mounted on the mounting frame 11.

Reference numeral 20 denotes a clutch shaft, which is fitted to the adjustment shaft 2 and can be moved only in the axial direction between the driven gear 12 and the roll shaft end 4A of the operation side roll split body 1A by a slide key mechanism 21 or the like. .

Reference numeral 22 denotes a clutch switching drive device (a fluid pressure cylinder in the embodiment), which is mounted on the mounting frame 11. The clutch rod 20 is fixed to the center of the piston rod via a bearing 23 so as not to move in the direction of the piston rod. Penetrates.

Reference numeral 24a denotes a clutch, in which the driven gear 12 and the clutch shaft 20 face each other and face each other at the same pitch in an annular manner at the opposite end faces. Reference numeral 24b denotes a clutch, which is an operation-side roll split body 1A.
The roll shaft end 4A and the end face of the clutch shaft 20 that are opposed to each other are formed with ring-shaped teeth at the same pitch in an annular shape. One clutch 24a (24b) can be engaged and the other clutch 24b (24a) can be disengaged by the axial movement of the clutch shaft 20 by the drive device 22.

In the above configuration, the driving device 22 controls the clutch shaft 20.
Is moved rightward in the figure, the clutch 24a is engaged,
The clutch shaft 20 is connected to the driven gear 12 and
24b is cut off and separated from the operation side roll split body 1A, so that the adjustment shaft 2 is connected via the clutch shaft 20 and the slide key mechanism 21.
Is connected to the driven gear 12.

Next, when the adjusting shaft 2 is rotated by the motor 16 of the roll width adjusting drive device 14 via the driving gear 15 and the driven gear 12, the screw portions 9A and 9B provided on the roll split bodies 1A and 1B are screwed together. Since the threaded portions 8a and 8b of the opposite threads are rotated, the roll divided bodies 1A and 1B simultaneously approach and separate by an equal amount along the guide mechanism 3 via the respective screw mechanisms, and the center of the roll width is the material. There is no deviation from the pass center O.
During this roll adjustment operation, the rotation of the driven gear 12 causes the detection gear to rotate.
Since the 18 is rotated, the roll width adjustment amount can be detected by the detector 19 via this gear mechanism. The clutch 24a
Since the engagement between the chevron teeth is shifted due to the repetition of the on-off operation, a detection error occurs. To avoid this, the pitch of the chevron teeth of the clutch 24a may be made sufficiently small.

After adjusting the roll width, when the clutch shaft 20 is moved leftward in the figure by the driving device 22, the clutch 24b is engaged, the clutch shaft 20 is connected to the operation-side roll split body 1A, and the clutch 24a is disengaged and driven. Since it is separated from the gear 12, the adjustment shaft 2 is connected via the clutch shaft 20 and the slide key mechanism 21.
Is connected to the operation-side roll split body 1A.

Thereafter, when the drive device 7 rotates the drive-side roll split body 1B, the drive-side roll split body 1B and the operation-side roll split body 1A connected thereto via the guide mechanism 3 are integrally rotated. After that, rolling is performed in a state where the roll width is adjusted in accordance with the in-flange distance of the rolled material 25. At the time of rolling, as described above, the adjusting shaft 2 is the operation side roll split body 1A.
And is rotated therewith, so that the roll width does not change during rolling. The horizontal force generated during rolling is transmitted to the adjusting shaft 2 via the screw portions 9A, 9B, 8a and 8b,
The difference between the left and right horizontal forces is supported by the post 5 via the thrust bearing 10 and the mounting frame 11. As shown, the guide mechanism 3 is divided into an operation-side roll split body 1A and a drive-side roll split body.
If a spline mechanism is provided at the fitting section of 1B, the vertical reaction force during rolling is supported not only by the adjustment shaft 2 but also by the two roll divided bodies 1
Since both A and 1B are supported, the rigidity of the entire roll assembly can be increased, which is preferable.

〔The invention's effect〕

As described above, according to the present invention, the roll width can be quickly adjusted from the operation side of the mill by the simultaneous approach / separation operation of the left and right roll divided bodies centered on the material path center, and the detector is provided on the drive device side. By providing the roll width adjustment amount, the roll width adjustment amount can be easily detected, so that the roll width adjustment can be performed online. In addition, since the adjusted roll width can be maintained during rolling, the rolling operation can be reliably performed. Accordingly, it is possible to improve the efficiency of the roll width adjustment operation and the dimensional accuracy of the product.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention in an upper half section, FIG. 2 is a plan view of a main part in FIG. 1, and FIG. 3 is a front view showing a conventional example in an upper half section. 1A: Operation side roll split body, 1B: Drive side roll split body, 2: Adjustment shaft, 3 ... Guide mechanism, 4A, 4B ... Roll shaft end, 5: Mill housing post, 6A, 6B …… Chock, 7… Drive device, 8a, 8b, 9A, 9B …… Screw,
10 ... thrust bearing, 11 ... mounting frame, 12 ... gear of driven body, 13 ... bearing, 14 ... drive for roll width adjustment, 17 ... roll width detection device, 20 ... clutch shaft, twenty one…
… Slip key mechanism, 22 …… Drive device for clutch switching,
23 ... Bearing, 24a, 24b ... Clutch.

 ──────────────────────────────────────────────────の Continuation of the front page (56) References JP-A 3-111403 (JP, U) JP-B 1-333243 (JP, B2) JP-B 7-106372 (JP, B2) JP-B 7- 106371 (JP, B2) JP 7-83885 (JP, B2) JP 7-57366 (JP, B2) JP 8-2454 (JP, B2) Utility model registration 2529208 (JP, Y2)

Claims (1)

(57) [Claims] 1. One of two roll divided bodies is a drive side,
With the other side as the operating side, an adjusting shaft is fitted into the center of both roll divided bodies from the operating side, and a threaded portion formed in the opposite thread of the adjusting shaft is provided with a thread provided at the center of both roll divided bodies. Each of them is screwed together and locked in the roll rotation direction via a guide mechanism provided between the roll divided bodies, and both roll divided bodies are provided so as to be able to approach and separate from each other in the roll axis direction, and on the adjustment shaft, The driven body facing the roll shaft end of the operation side roll split body is fitted and fixed, and is movable only in the axial direction between the driven body and the roll shaft end of the operation side roll split body on the adjustment shaft. The clutch shaft is fitted, and a clutch is provided between one end of the clutch shaft and the driven body and between the other end of the clutch shaft and the roll shaft end of the operation-side roll split body. Clutch can be engaged and the other clutch A clutch switching drive apparatus capable off, roll width adjusting device of the variable width divided rolls, characterized in that a and roll width adjustment drive for rotating the driven member.