JPH0839104A - Three-roller guide device for skin pass of bar and wire - Google Patents

Abstract

PURPOSE:To prevent the generation of miss roll in the tip part of a rolled stock, to prevent a guide roller from being scratched with the tip part of the rolled stock and to roll the rolled stock of high dimensional accuracy. CONSTITUTION:On a roller guide mechanism 1, guide rollers 12 are freely rotatably pivoted on respective eccentric shaft parts 13a of three support shafts 13... which are pivoted. The support shafts 13 are mutually interlockingly revolved and one support shaft 13A among them is connected with a cam shaft 22 of an opened/closed interval adjusting mechanism 2 for adjusting the opened position and closed position of the intervals V between the guide rollers 12. A driving mechanism 3 is connected with the opened/closed interval adjusting mechanism 2 and the intervals V between the guide rollers 12 which are adjusted with this opened/closed interval adjusting mechanism are moved to either opened position or closed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin pass three-roller guide which is installed on the exit side of a finish rolling mill and is used for skin pass rolling of a rod or wire rod.

[0002]

2. Description of the Related Art Conventionally, three planet gears are meshed with a gear that is rotatably provided in a casing, and a support shaft that axially supports a pinion gear and a guide roller provided in the planet gears. The eccentric shaft, which rotatably supports the guide roller at a high reduction ratio, is rotated via a worm gear provided on the worm gear so that the interval between these three guide rollers can be adjusted at the same time. Therefore, a skin pass three-roller guide is known in which the intervals between the three guide rollers are finely adjusted simultaneously in accordance with the dimensions of the rolled material to be skin-passed. According to this, by making it possible to adjust the intervals of the three guide rollers simultaneously and precisely, it is possible to shorten the time for adjusting the intervals of the guide rollers in accordance with the dimensions of the rolled material (actual fair 3-41848). Issue).

[0003]

However, in order to shape the rolled material, it is common to set the spacing of the guide rollers to be slightly smaller than the dimension of the rolled material. It is set narrower than the dimensions of the rolled material, and the tip of the rolled material is less likely to be caught in the guide roller, so misrolls occur or the tip of the rolled material collides with the guide roller and scratches the guide roller. However, there is a problem that the flaw is transferred to the surface of the product and causes a surface flaw.

Therefore, an object of the present invention is to prevent the occurrence of misroll at the tip of the rolled material, and to prevent the guide roller from being scratched by the tip of the rolled material. To provide.

[0005]

A feature of the present invention is to provide a roller guide mechanism capable of simultaneously adjusting the intervals of the guide rollers so that the tip end of the rolled material can be easily caught in the three guide rollers. This roller guide mechanism is provided with an opening / closing interval adjusting mechanism capable of adjusting the open position and the closed position of the guide roller interval, and further, a drive mechanism (a reduction mechanism) for driving the interval of the guide rollers to either the open position or the closed position. ) Is provided. The roller guide mechanism is rotatably supported by the guide box at intervals of 120 degrees.
A guide roller is rotatably supported on each of the eccentric shaft portions of the three supporting shafts, and the supporting shafts are interlocked with each other by interlocking means, and one of the three supporting shafts is rotated. The support shaft is connected to a cam shaft for opening and closing the gap between the guide rollers.

The open / close interval adjusting mechanism is characterized in that it is provided in the case, and a cam plate for defining an open position of the interval between the guide rollers and a stop pin movably provided in the cam plate. A rotating ring for adjusting the closed position of the interval, a worm that meshes with a worm wheel of the rotating ring for rotating the rotating ring in order to position the stop pin, and an open position defined by a cam plate. A cam that is rotatably provided between a closed position that can be adjusted by a stop pin, a cam shaft that has a cam and that is rotatably supported in the case, and an input side of the cam shaft. The power transmission means provided in the and the output shaft on the other end side of the cam shaft are connected to one support shaft of the guide roller.

The drive mechanism is characterized by a housing, a ring gear rotatably supported on the housing, a pinion, a planet gear, an output shaft, and a drive shaft that is rotationally driven by a rotary drive source. The ring gear has gears on the outer and inner circumferences, the pinion meshes with the ring gear, the planetary gear meshes with the ring gear, and the output shaft supports the planetary gear to support the opening / closing interval adjustment mechanism. Is connected to the power transmission means, and the tooth portion of the drive shaft is in mesh with the planet gear.

[0008]

The worm 25 of the opening / closing interval adjusting mechanism 2 is rotated to adjust the position of the stop pin 24 to a position (180 degree position) where the guide roller interval in the case is minimized.
The distance V between the guide rollers 12 by the pinion 37 of the drive mechanism
Is adjusted according to the dimensions of the rolled material. Next, warm 2
5 is rotated to rotate the stop pin 24 counterclockwise to abut the cam 22a to adjust the closed position. Open position 21A
Has a fixed position due to the shape of the cam plate 21, and if the closed position is determined by the above work, the open position and the closed position are determined. Therefore, the hydraulic motor 35 of the drive mechanism 3 is rotated and The distance V is adjusted to either the open position or the closed position.

The drive mechanism 3 guides the guide rollers 12 ...
By opening and closing the space between the guide rollers, the interval between the guide rollers is kept waiting at the open position determined by the opening and closing interval adjusting mechanism 2 until the leading end of the rolled material bites into the guide roller.
From the biting of the rolled material to the trailing edge of the rolled material, the distance between the guide rollers is adjusted to the closed position determined by this open / close interval adjustment mechanism, and the rolled material is shaped. After slipping out, the gap between the guide rollers 12 ... Is returned to the open position at the open position 21A.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The structure of the three-roller guide device according to the present invention can be broadly classified as shown in FIG.
It is composed of a roller guide mechanism 1, an opening / closing interval adjusting mechanism 2 and a drive mechanism 3 of this adjusting mechanism.

First, the specific structure of the roller guide mechanism 1 will be described.

In FIG. 1, a bearing chamber 11 formed in a guide box 10 is radial at equal angles in three directions. In this bearing chamber, in the same vertical plane orthogonal to the pass line of the rod and wire, 3 guide rollers 12, 12,
12 are rotatably supported by support shafts 13, 13 and 13A, respectively. Support shafts 13, 13, 13A
Are rotatably supported in the bearing chamber 11, and the eccentric shaft portion 13a of the support shaft is rotatably supported by the guide rollers 12 through bearings (not shown). . Further, one end of the two support shafts 13 and 13 and the other one
Bevel gears 14 of interlocking means are rotatably attached to both ends of the support shaft 13A, and the bevel gears mesh with each other. Therefore, one of the support shafts 13A is supported. When the support shafts 13 and 13 are rotated, the other support shafts 13 and 13 also rotate in conjunction with this. By this rotation, the eccentric shaft portion 1
Three guide rollers 12 rotatably supported by 3a
Is moved back and forth in the bearing chamber 11, and the distance V at which the guide rollers are close to each other can be adjusted.

Next, a specific structure of the opening / closing interval adjusting mechanism 2 will be described with reference to FIGS.

The opening / closing interval adjusting mechanism 2 includes a guide roller 12
It adjusts the position where the mutual interval V is farthest away from each other, that is, the position where it is narrower than the open position, that is, the closed position.

In FIG. 1, a case 20 is fixed to a guide box 10, and a cam plate 21 is fixedly installed in the case as shown in FIG. The open / close range of the interval between the rollers 12 is determined. A cam shaft 22 is rotatably supported at the center of the case 20. The cam shaft is connected to one support shaft 13A of the roller guide mechanism 1 described above. The shaft has a rotating ring 23
Is rotatably supported. Further, a stop pin 24 is provided on the rotary ring 23 so as to project, and is positioned in an adjustment hole portion 21 a formed in the cam plate 21. A worm wheel 23a is engraved on the outer periphery of the rotary ring 23, and a worm 25 is rotatably provided on the upper portion of the case 20. The worm 25 is attached to the worm wheel 23a of the rotary ring 23. Since they are engaged with each other, by rotating the worm, the rotating ring 23 can be rotated left and right according to the rotating direction, and the installation position of the stop pin 24 can be positioned. The cam plate 21 is integrally formed with a chevron-shaped open position 21A that is inserted into the adjustment hole 21a.

A cam 22a is integrally formed on the cam shaft 22. This cam has one side formed in a square shape and the other side formed in an arc shape. This arc surface slides on the tip of the open position 21A. This cam is movable, and can rotate within a range from 0 degree to a maximum of 180 degrees while the stop pin 24 is located from the open position 21A of the cam plate 21. Therefore, the support shaft 13A of the roller guide mechanism 1 connected to the cam shaft 22 can be rotated within an arbitrary opening / closing range of 0 ° to 180 ° to open / close the interval V between the guide rollers 12. it can. A specific method of adjusting the gap between the guide rollers 12 by the opening / closing gap adjusting mechanism 2 will be described later.

The case 20 is attached to the drive mechanism 3 side (left side in FIG. 1).
A bevel gear 26, which is a power transmission means, is provided at the input portion of the cam shaft 22 that is inserted through the shaft of the cam shaft 22, and is meshed with a bevel gear 34 (FIG. 5) that is axially attached to the output shaft 32 of the drive mechanism. ing.

Next, a specific structure of the drive mechanism 3 will be described.

As shown in FIGS. 4 and 5, a housing 30 of the drive mechanism 3 is fixed to the guide box 10, and a ring gear 31 is rotatably supported in the housing. A tooth portion is formed on the outer circumference and the inner circumference of the ring gear. An output shaft 32 is inserted in the hollow portion of the ring gear 31, and four planet gears 33 (FIG. 4) are rotatably supported on the output shaft. The one end 32a projects from the housing 30 toward the opening / closing interval adjusting mechanism 2 side (right side in FIG. 5), and the bevel gear 34 is axially mounted on the projecting portion a. Further, as shown in FIG. 5, the output shaft 36 of the hydraulic motor 35 is formed with a tooth portion 36 a, and this output shaft is located in the hollow portion of the rotation center of the ring gear 31 and the output shaft 32. The tooth portions 36 a mesh with each of the planetary gears 33. Also, the housing 3
At the upper part of 0, a pinion 37 is rotatably supported, and this pinion meshes with the outer teeth of the ring gear 31, and when this pinion is rotated, the bevel gear 34 is moved to the left and right according to the rotation direction. It can be rotated.

Next, the usage of the present invention will be described.

In order to skin-pass-roll a rolled material using the roller guide device 1, it is necessary to lightly reduce the rolled material as described in the above-mentioned conventional example. Therefore, the distance V between the guide rollers 12 ... It is necessary to set the width slightly smaller than the size of the rolled material, but if this space between the guide rollers is narrowed, there is a problem that the leading end of the rolled material easily hits the guide roller.

In the present invention, the interval V between the guide rollers is set until the leading end of the rolled material passes the guide rollers 12.
Is extended to the open position and made to stand by, and the interval V between the guide rollers is narrowed to the closed position until the trailing edge of the rolled material passes through the guide roller and the trailing edge of the rolled material is slipped off. However, after the rolled material has slipped out, it is returned to the open position and is on standby.

Therefore, in the present invention, the hydraulic motor 35 of the drive mechanism 3 is controlled, but the opening / closing interval V of the guide rollers 12 is adjusted by the opening / closing interval adjusting mechanism 2.

Now, a method of adjusting the distance between the guide rollers 12 by the opening / closing distance adjusting mechanism 2 will be described. The worm 25 is rotated to rotate the rotary ring 23, and FIG.
21A from the position (open position) of 0 degrees to the position of 180 degrees shown by the solid line in this drawing, the stop pin 24 is installed to minimize the distance V between the guide rollers 12 (closed position). To That is, as shown in FIG. 2, when the stop pin 24 is moved to the limit position in the clockwise direction, that is, the position shown by the solid line, and adjusted, the cam 22a rotates right from the open position 21A to hit the stop pin. 180 until touching and stopping
It is possible to rotate it once.

In FIG. 5, the pinion 37 of the drive mechanism 3 is shown.
To rotate the ring gear 31, the planetary gear 33, the output shaft 32.
And the bevel gear 26 of the opening / closing interval adjusting mechanism 2 is rotated via the bevel gear 34, and the support shaft 13A connected to this cam shaft is rotated via the cam shaft 22 provided with this bevel gear. Let As a result, the distance V between the three guide rollers 12 provided on the eccentric shaft portion 13a is adjusted to a required dimension. This adjustment dimension is, for example, the position of the stop pin 24 in FIG.
Cam 22a is in the open position 21
Turn clockwise from A and come into contact with this stop pin until it stops 4
It is possible to rotate 5 degrees and it is necessary to position it. Therefore, when the stop pin 24 is adjusted to the position shown by the chain line in FIG. 2, the cam 22a rotates clockwise from the open position 21A and can rotate 45 degrees until it comes into contact with the stop pin at the position of this chain line and stops. Is.

Here, a concrete example is shown. The eccentric shaft portion 1
The eccentricity of 3a is set to 3 mm, and the cam 22a as shown in FIG.
When the eccentric shaft portion is assembled by combining the guide rollers 12 so that the distance between the guide rollers 12 is maximum when the eccentric shaft portion is rotated to the 180-degree position. , Guide roller 1 from open position to closed position
2 ... The amount of change in the distance V between them is 6 mm. Further, when the eccentric shaft portion 13a rotates to the position of 45 degrees, the guide roller 12 ... Interval V from the open position 21A to the closed position
Is about 0.9 mm. That is, since the amount of change between cores = the amount of eccentricity−the amount of eccentricity × COSθ, the amount of change is 180 °, the amount of change is 3−3COS, the degree is 180 °, and the amount of change is 645 °, the amount of change is 3−3COS, 45 °. It becomes 9.

The position of the stop pin 24 when the worm 25 is rotated can be confirmed by the scale marked on the worm.

For example, when the position of the cam 22a when adjusted to the required size, that is, the closed position of the interval V of the guide rollers 12 is the position shown by the chain line in FIG. 2, the worm 25 rotates the rotary ring 23. Is rotated to bring the stop pin 24 into contact with the cam 22a, the closed position of the mutual spacing of the guide rollers 12 is adjusted, and the open position 21A of this guide roller spacing is such that the cam 22a is moved by the cam plate 21. Since the guide rollers are in contact with each other, the distance between the guide rollers can be opened and closed between 0 degrees (that is, the open position) and 45 degrees (the closed position).

Next, the guide roller 12 by the drive mechanism 3
The opening / closing operation of the mutual interval will be described. After the opening / closing position of the opening / closing interval is adjusted by the opening / closing interval adjusting mechanism 2, the drive mechanism adjusts the opening / closing position of the rolled material to the roller guide, The distance between the guide rollers is adjusted to either the open position or the closed position. That is, until the tip of the rolled material passes the guide rollers 12, the hydraulic motor 35 is rotated to output the output shaft 32 of the drive mechanism.
By rotating the bevel gear 34 so that the cam 22a of the opening / closing interval adjusting mechanism 2 is at the open position 21A via the bevel gear 34, and the interval between the guide rollers is widened so that the leading end of the rolled material passes through the guide roller. From the beginning until the trailing edge part slips out, the hydraulic motor 35 is rotated in the reverse direction, and the interval between the guide rollers is narrowed so that the rolled material is lightly rolled at the closed position to skin-pass the rolled material. The hydraulic motor 35 is driven so as to return to the above-mentioned open position after slipping out.

[0031]

According to the present invention, the gap between the three guide rollers can be adjusted at the same time by the opening / closing gap adjusting mechanism and the driving mechanism provided in the roller guide device, and the progress of the rolled material can be further improved. Accordingly, it is possible to adjust the spacing of the guide rollers to either the open position or the closed position, and since the rolled material can be accurately guided to the hole shape of the rolling roll, the misroll at the tip of the rolled material can be prevented. It is possible to prevent this from occurring, and further to prevent the guide roller from being scratched by the leading end of the rolled material, and it is possible to roll the rolled material with high dimensional accuracy.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing the entire device.

FIG. 2 is a vertical sectional view of an opening / closing interval adjusting mechanism.

FIG. 3 is a horizontal sectional view of an opening / closing interval adjusting mechanism.

FIG. 4 is a vertical sectional view of a drive mechanism.

FIG. 5 is an enlarged horizontal sectional view of a drive mechanism.

[Explanation of symbols]

 1 Roller Guide Mechanism 10 Guide Box 12 Guide Roller 13 Support Shaft 13a Eccentric Shaft 13A Support Shaft 14 Interlocking Means (Bevel Gear) 2 Opening / closing Interval Adjusting Mechanism 20 Case 21 Cam Plate 21A Open Position 22 Cam Shaft 22a Cam 23 Rotating Ring 23a Worm wheel 24 Stop pin 25 Worm 26 Power transmission mechanism (bevel gear) 3 Drive mechanism 30 Housing 31 Ring gear 32 Output shaft part 33 Planetary gear 34 Power transmission mechanism (bevel gear) 35 Rotation drive mechanism (hydraulic motor) 36 Drive shaft 36a Tooth 37 pinion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Otobe 12 Nakamachi, Muroran City, Hokkaido Inside Nippon Steel Co., Ltd. Muroran Works (72) Inventor Yu Miyata, 12 Nakamachi, Muroran City, Hokkaido Inside Japan Muroran Works

Claims (3)

[Claims] 1. A roller guide mechanism (1), a guide roller opening / closing interval adjusting mechanism (2), and a drive mechanism (3), wherein the roller guide mechanism (1) comprises a guide box (1).
0), three guide rollers (12 ...) Provided in the guide box, a support shaft (13 ...) Which supports the guide rollers, and a rotation interlocking means (1) of the support shaft.
4 ...), the guide rollers are arranged at equal angular intervals on the same vertical plane orthogonal to the pass line of the rod wire, and the support shaft has an eccentric shaft portion (13a). The guide box is rotatably supported, and each of the eccentric shafts rotatably supports the guide roller, and one of the support shafts (13A) is rotated. The other support shafts can be simultaneously rotated by means of the guide roller opening / closing interval adjusting mechanism (2).
The open position and the closed position of the interval (V) of the individual guide rollers can be adjusted, and the interval of the guide rollers is opened and closed according to the progress of the rolled material. The drive mechanism (3) is A three-roller guide device for a skin wire pass of a rod or wire, characterized in that the above-mentioned three guide rollers are driven to the open position and the closed position. 2. The guide roller opening / closing interval adjusting mechanism (2) according to claim 1 is provided in a case (20), and an open position (21A) between the guide rollers (12 ...) Is provided. ), A rotation pin (23) for adjusting the closed position of the space between the guide rollers, and a stop pin (24) movably provided in the cam plate. The worm wheel (23) of the rotating ring is used to rotate the rotating ring to position the pin.
a cam rotatably provided between a worm (25) meshing with a), an open position (21A) defined by the cam plate and a closed position adjustable by the stop pin (24). (22a), a cam shaft (22) provided with the cam and rotatably supported in the case (20), and a power transmission means (26) provided on the input side of the cam shaft.
And the output shaft on the other end side of the cam shaft is a guide roller (1
A three-roller guide device for skin path of a rod wire, which is connected to one support shaft (13A) of 2). 3. The drive mechanism (3) according to claim 1, wherein a housing (30), a ring gear (31) rotatably supported on the housing, a pinion (37),
A planetary gear (33 ...), an output shaft (32), and a drive shaft (36) that is rotationally driven by a rotary drive source (35). The ring gear includes gears on the outer circumference and the inner circumference. The pinion meshes with the ring gear, the planetary gear meshes with the ring gear, the output shaft pivotally supports the planetary gear, and the open / close interval adjusting mechanism (2) includes A three-roller guide device for a skin-pass of a wire rod, which is connected to the power transmission means (26), and a tooth portion (36a) of the drive shaft (36) is meshed with the planet gear.