JP3245503B2 - 3-roller guide device for skin pass of rod wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, three planet gears mesh with the inside of a gear rotatably provided on a casing, and a support shaft which supports a pinion gear provided on the planet gear and a guide roller. The eccentric shaft that rotatably supports the guide rollers at a high reduction ratio is rotated through the worm gear provided in the above, so that the distance between the three guide rollers can be simultaneously finely adjusted. Thus, there is known a skin-pass three-roller guide that simultaneously fine-adjusts the distance between three guide rollers in accordance with the dimensions of the rolled material to be skin-passed. According to this, since the distance between the three guide rollers can be adjusted simultaneously and precisely, the time for adjusting the distance between the guide rollers according to the size of the rolled material can be reduced (actually 3-41848). No.).

[0003]

However, in order to shape the rolled material, it is general to set the distance between the guide rollers slightly smaller than the size of the rolled material. It is set narrower than the size of the rolled material, and the leading end of the rolled material is difficult to bite into the guide roller, so misrolling occurs, or the leading end of the rolled material collides with the guide roller and scratches the guide roller In addition, there has been a problem that the flaws are transferred to the product surface and cause surface flaws.

Accordingly, an object of the present invention is to prevent the occurrence of misrolling at the leading end of a rolled material, and furthermore, to provide a three-roller guide device for skin pass of a rod or wire rod which does not damage a guide roller caused by the leading end of the rolled material. Is to provide.

[0005]

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

A feature of the opening / closing interval adjusting mechanism is provided in the case, a cam plate for determining an open position of an 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 meshing with a worm wheel of the rotating ring for rotating the rotating ring for positioning the locking pin, and an open position defined by the cam plate. A cam rotatably provided between a closed position provided by a stop pin so as to be adjustable in position, a cam shaft having the cam and rotatably supported in a case, and an input side of the cam shaft And the output shaft at the other end of the cam shaft are connected to one support shaft of the guide roller.

The driving mechanism is characterized by a housing, a ring gear rotatably supported by the housing, a pinion, a planetary gear, an output shaft, and a driving shaft that is rotationally driven by a rotational driving 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, the output shaft supports the planetary gear, and the opening / closing interval adjustment mechanism And the teeth of the drive shaft are in mesh with the planetary gears.

[0008]

The rotation of the worm 25 of the opening / closing interval adjusting mechanism 2 adjusts 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, the stop pin 24 is rotated counterclockwise to contact the cam 22a, and the closing position is adjusted. Open position 21A
Is fixed at the fixed position in the shape of the cam plate 21. If the closed position is determined by the above operation, the open position and the closed position are determined. Therefore, the hydraulic motor 35 of the drive mechanism 3 is rotated to rotate the guide rollers 12. The position of the interval V is adjusted to either the open position or the closed position.

The drive mechanism 3 guides the guide rollers 12.
By driving the opening and closing of the interval, the interval between the guide rollers is made to stand by at the open position determined by the opening and closing interval adjusting mechanism 2 until the leading end portion of the rolled material bites into the guide roller,
Until the rolled material bites into the guide roller and comes off the tail, the interval between the guide rollers is set to the closed position determined by this opening / closing interval adjusting mechanism, and then the rolled material is shaped. After the trailing edge is removed, the interval between the guide rollers 12 is returned to the open position 21A.

[0010]

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 roughly classified as shown in FIG.
It comprises a roller guide mechanism 1, an opening / closing interval adjusting mechanism 2, and a driving mechanism 3 of the adjusting mechanism.

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

In FIG. 1, a bearing chamber 11 formed in a guide box 10 is radially formed at an equal angle in three directions. In this bearing chamber, a bearing chamber 11 is provided in the same vertical plane perpendicular to a pass line of a rod material. Three guide rollers 12, 12,
12 is rotatably supported via support shafts 13, 13 and 13A, respectively. Support shafts 13, 13, 13A
Are rotatably supported in the bearing chamber 11, and each of the guide rollers 12 is rotatably supported on the eccentric shaft portion 13a of the support shaft via a bearing (not shown). . Further, one end of the two support shafts 13 and 13 is connected to the other one.
Bevel gears 14 of the interlocking means are axially mounted on both ends of the support shaft 13A, respectively. Since the bevel gears mesh with each other, one of the support shafts 13A is connected to the support shaft 13A. When rotated, the other support shafts 13, 13 also rotate in conjunction with this. By this rotation, the eccentric shaft 1
Three guide rollers 12 rotatably supported by 3a
Move in the bearing chamber 11 back and forth, and the distance V between the guide rollers can be adjusted.

Next, a specific configuration 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
Are adjusted to adjust the position where the mutual interval V is maximum, that is, the position that is narrower than the open position, that is, the position of 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 opening / closing 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
Are rotatably supported. Further, a stop pin 24 protrudes from the rotating ring 23 and is located in an adjustment hole 21 a formed in the cam plate 21. A worm wheel 23a is engraved on the outer periphery of the rotating ring 23, and a worm 25 is rotatably provided on the upper part of the case 20, and the worm 25 is attached to the worm wheel 23a of the rotating ring 23. By rotating the worm, the rotation ring 23 can be rotated left and right in accordance with the rotation direction, and the installation position of the stop pin 24 can be determined. The cam plate 21 is integrally formed with a chevron-shaped open position 21A that penetrates into the adjustment hole 21a.

A cam 22a is formed integrally with the camshaft 22. This cam has one side formed in a square shape and the other side formed in an arc shape, and this arc shape surface slides with the tip of the open position 21A. The cam is rotatable in a range from 0 degrees 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 degrees to open and close the interval V between the guide rollers 12. it can. A specific method of adjusting the distance between the guide rollers 12 by the opening / closing interval adjusting mechanism 2 will be described later.

The case 20 is moved to the drive mechanism 3 side (left side in FIG. 1).
A bevel gear 26 serving as a power transmission means is provided at an input portion of the camshaft 22 which is inserted into the camshaft 22, and meshes with a bevel gear 34 (FIG. 5) which is axially mounted on an output shaft 32 of the drive mechanism. ing.

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

As shown in FIGS. 4 and 5, a housing 30 of the driving 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 periphery and the inner periphery of the ring gear. An output shaft 32 is inserted in a hollow portion in the ring gear 31, and four (FIG. 4) planetary gears 33 are rotatably supported on the output shaft. One end 32a protrudes from the housing 30 toward the opening / closing interval adjusting mechanism 2 (right side in FIG. 5), and a bevel gear 34 is axially mounted on the protruding portion a. As shown in FIG. 5, a tooth portion 36 a is formed on the output shaft 36 of the hydraulic motor 35, and the output shaft is located in a hollow portion of the rotation center of the ring gear 31 and the output shaft 32. The teeth 36a mesh with the planetary gears 33, respectively. Also, housing 3
A pinion 37 is rotatably supported on the upper part of the ring gear 0. The pinion meshes with the external teeth of the ring gear 31, and when this pinion is turned, the bevel gear 34 is moved left and right according to the turning direction. Can be rotated.

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

In skin pass rolling of a rolled material using the roller guide device 1, it is necessary to slightly reduce the rolled material as described in the above-mentioned conventional example. Although it is necessary to set the width of the rolled material to be slightly smaller, there is a problem that if the distance between the guide rollers is reduced, the leading end of the rolled material is likely to strike the guide roller.

In the present invention, until the leading end of the rolled material passes through the guide rollers 12,...
Until the leading end of the rolled material passes through the guide roller and the trailing end of the rolled material passes through the guide roller, the distance V between the guide rollers is narrowed to the closed position, and the rolled material is skin-passed. Then, after the rolled material has come off, it returns to the open position and waits.

For this reason, in the present invention, the hydraulic motor 35 of the driving mechanism 3 is controlled, and the opening / closing interval V of the guide rollers 12 is adjusted by the opening / closing interval adjusting mechanism 2.

A method of adjusting the interval between the guide rollers 12 by the opening / closing interval adjusting mechanism 2 will be described. The worm 25 is rotated to rotate the rotating ring 23, and FIG.
From the 0 degree position (open position) indicated by 21A to the 180 degree position indicated by the solid line in this drawing, a position (close position) where the interval V between the guide rollers 12 is minimized. To That is, as shown in FIG. 2, when the stop pin 24 is moved to the clockwise limit position, that is, the position shown by the solid line and adjusted, the cam 22a rotates clockwise from the open position 21A and contacts the stop pin. 180 until touching and stopping
It is possible to rotate degrees.

In FIG. 5, the pinion 37 of the drive mechanism 3
, The ring gear 31, the planetary gear 33, the output shaft 32
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 the cam shaft is rotated via the cam shaft 22 provided with the bevel gear. Let it. Thereby, the interval V between the three guide rollers 12 provided on the eccentric shaft portion 13a is adjusted to a required size. If the adjustment dimension is, for example, the position of the locking pin 24 is as shown in FIG.
, The cam 22a is in the open position 21.
Rotate right from A to 4
It can be rotated 5 degrees and its position needs to be determined. 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 the chain line and stops. It is.

Here, a specific example will be described.
The eccentric amount of 3a is set to 3 mm, and as shown in FIG.
When the eccentric shaft portion is assembled in such a manner that the interval between the guide rollers 12 is maximized when the eccentric shaft portion is at the open position 21A, when the eccentric shaft portion rotates to the position of 180 degrees, , Guide roller 1 from open position to closed position
2... The amount of change in the interval V between them is 6 mm. When the eccentric shaft portion 13a rotates to the 45-degree position, the guide rollers 12 from the open position 21A to the closed position.
Is about 0.9 mm. That is, since the amount of change between the cores is equal to the amount of eccentricity−the amount of eccentricity × COSθ, the amount of change is 180 degrees, the amount of change is 3-3 COS, the amount of eccentricity is 180 degrees, the amount of change is 3-3 COS 45 degrees = about 0. It becomes 9.

The position of the stop pin 24 when rotating the worm 25 can be confirmed by a scale engraved on the worm.

For example, assuming that the position of the cam 22a when adjusted to the required size, that is, the closed position of the interval V between the guide rollers 12, is as shown by the chain line in FIG. Is rotated to bring the stop pin 24 into contact with the cam 22a, thereby adjusting the closed position of the guide rollers 12 to each other. , The guide rollers can be opened and closed at an interval of 0 degrees (that is, an open position) to 45 degrees (a closed position).

Next, the guide roller 12 by the driving mechanism 3
… The opening / closing operation of the interval between the members will be described. After the opening and closing positions of the opening / closing interval are adjusted by the opening / closing interval adjusting mechanism 2, the driving mechanism adjusts the rolled material to the roller guide according to the state of progress. The interval between the guide rollers is adjusted to either the open position or the closed position. That is, the hydraulic motor 35 is rotated until the leading end of the rolled material passes through the guide rollers 12.
Is rotated so that the cam 22a of the opening / closing interval adjusting mechanism 2 is at the open position 21A via the bevel gear 34 so that the distance between the guide rollers is increased, and the leading end of the rolled material passes through the guide roller. Until the trailing end of the rolled material is removed, the hydraulic motor 35 is rotated in the reverse direction, the distance between the guide rollers is reduced so that the rolled material is lightly reduced at the closed position, and the rolled material is skin-passed. After the butt has been pulled out, the hydraulic motor 35 is driven to return to the above-described open position.

[0031]

According to the present invention, the gap between the three guide rollers can be simultaneously adjusted by the opening / closing interval adjusting mechanism and the drive mechanism provided in the roller guide device, and the progress of the rolled material can be controlled. It is possible to adjust the distance between the guide rollers to either the open position or the closed position in accordance with this, and the rolled material can be accurately guided to the groove shape of the rolling roll. It is possible to prevent the occurrence of the occurrence and to prevent the guide roller from being flawed by the leading end portion of the rolled material, and it is possible to roll a rolled material having high dimensional accuracy.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view showing the entire apparatus.

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 driving mechanism.

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

[Explanation of symbols]

 Reference Signs List 1 roller guide mechanism 10 guide box 12 guide roller 13 support shaft 13a eccentric shaft portion 13A support shaft 14 interlocking means (bevel gear) 2 opening / closing interval adjustment mechanism 20 case 21 cam plate 21A open position 22 cam shaft 22a cam 23 rotation 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 33 Planetary Gear 34 Power Transmission Mechanism (Bevel Gear) 35 Rotary Drive Mechanism (Hydraulic Motor) 36 Drive Shaft 36a Tooth 37 pinion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-200426 (JP, A) JP-A-58-188509 (JP, A) JP-A-53-90032 (JP, U) 41848 (JP, Y2) Jiko 44-31237 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 39/14

Claims (3)

(57) [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) includes a guide box (1).
0), three guide rollers (12...) Provided in the guide box, support shafts (13...) That support the guide rollers, and interlocking means (1) for rotating 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 bar and wire, and the support shaft has an eccentric shaft portion (13a). Each of the eccentric shaft portions rotatably supports the guide roller, and rotates one of the support shafts (13A). By this, the other support shaft can be simultaneously rotated, and the opening / closing interval adjusting mechanism (2) for the guide roller is
The open position and the closed position of the interval (V) between the guide rollers can be adjusted, and the interval between the guide rollers is opened and closed in accordance with the progress of the rolled material. A three-roller guide device for skin pass of a rod or wire, wherein the distance between the three guide rollers is driven to an open position and a closed position. 2. The guide roller opening / closing interval adjusting mechanism (2) according to claim 1 is provided in a case (20), and the open position (21A) of the interval between the guide rollers (12...) Is provided. ), A stop pin (24) is movably provided in the cam plate, and a rotating ring (23) for adjusting a closed position of the guide roller interval; The worm wheel (23) of the rotating ring is used to rotate the rotating ring to position the pin.
a) a worm (25) meshing with a), and a cam rotatably provided between an open position (21A) defined by the cam plate and a closed position provided to be adjustable by the stop pin (24). (22a); a camshaft (22) having the cam and rotatably supported in the case (20); and a power transmission means (26) provided on an input side of the camshaft.
And an output shaft on the other end side of the cam shaft is connected to a guide roller (1).
2) A three-roller guide device for skin pass of a wire rod, which is connected to one support shaft (13A) of (2). 3. The drive mechanism (3) according to claim 1, wherein the housing (30), a ring gear (31) rotatably supported by the housing, a pinion (37),
A planetary gear (33 ...), an output shaft (32), and a drive shaft (36) driven to rotate by a rotary drive source (35). 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, the output shaft pivotally supports the planetary gear, and controls the opening / closing interval adjusting mechanism (2). A three-roller skin pass three-roller guide device, wherein the toothed portion (36a) of the drive shaft (36) is meshed with the planetary gear, which is connected to the power transmission means (26).