JP3318113B2 - Vertical roll drive for universal rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal rolling mill having a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls disposed on an axis perpendicular to the axis of these horizontal rolls. And a device for driving a vertical roll.

[0002]

2. Description of the Related Art In a conventional general rolling mill, a pair of right and left vertical rolls is a so-called idle roll which is not driven, and therefore stops until a material to be rolled such as an H-beam or an I-beam is engaged. The rotation started when the material to be rolled was engaged. Therefore, when the material to be rolled bites into the vertical roll, there is an impact between the material and the vertical roll.
Due to a considerable time lag, during this time, the surface of the vertical roll and the material to be rolled is scratched or unevenly worn due to slippage due to a speed difference between the vertical roll and the material to be rolled.

Therefore, the vertical roll is forcibly driven,
2. Description of the Related Art A rolling mill has been proposed that aims to make the peripheral speed of rotation of a vertical roll coincide with the traveling speed of the material to be rolled when the rolled material bites between the vertical rolls. Examples of this type of rolling mill include, for example, JP-A-51-105959 and JP-A-52-26.
No. 635 is disclosed. The former has a structure in which a number of blades are arranged at equal intervals in a circumferential direction with respect to a vertical roll, and the vertical roll is rotated by applying pressure fluid blown out from a fluid jet nozzle attached to a vertical roll chock to the blades. In the latter case, a friction drive wheel for rotational driving is brought into contact with the surface of the vertical roll, and the friction wheel is fixed to a housing outside the vertical roll chock by a drive shaft and a bevel gear that penetrates the vertical roll chock. It consists of a structure to rotate.

[0004]

However, the vertical roll driving devices in the universal rolling mills described in the above publications have the following disadvantages.

A. JP-A-51-105959: Since the structure is such that a heavy vertical roll is indirectly rotated by a pressurized fluid, the vertical roll may not rotate. A difference occurs in the rotation performance of the vertical roll due to the shape of the blade and the sealing performance of the pipe for the pressure fluid. Therefore, it is difficult to grasp the rotation performance of the vertical roll at the design stage. Vertical roll inertia,
Speed control (synchronization with the running speed of the material to be rolled) is difficult because the rotation speed fluctuates due to the fluctuation of the rotation resistance. Pressure fluid may leak out, resulting in large losses. Since the blades are attached to the vertical roll, the height of the vertical roll and the vertical roll chock are increased, and the size of the apparatus is increased.

B. Japanese Utility Model Application Laid-Open No. 52-26635: A vertical friction roller is brought into contact with the surface of the vertical roll, and the vertical roll is rotated using frictional force. That is, since the surface of the vertical roll gradually becomes dirty or wears due to the contact of the material to be rolled, slipping occurs with a friction wheel, and the vertical roll may not be able to rotate. Since a drive device is provided outside the vertical roll chock, it is necessary to provide a rotation transmission mechanism that extends over the vertical roll chock and the housing, and the structure of the vertical roll chock becomes complicated. Increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and in a universal rolling mill, a vertical roll is reliably rotated as required, and the peripheral speed of the rolled material and the vertical roll is reduced when the rolled material is engaged. It is an object of the present invention to provide a vertical roll driving device capable of eliminating a speed difference between the vertical roll and the vertical roll.

[0008]

In order to achieve the above object, a vertical roll driving device according to the present invention comprises a pair of upper and lower horizontal rolls and an axial center perpendicular to the axes of these horizontal rolls. A vertical roll driving device for a universal rolling mill having a pair of left and right vertical rolls, and a drive device for transmitting a rotational driving force to the vertical rolls from the inside thereof is provided in a shaft portion of the vertical roll chock that supports the vertical rolls. Then
In addition, the internal gear can be integrally rotated on the inner peripheral surface of the vertical roll.
Provided, through a plurality of gears meshing with this internal gear
Driven by a drive device and the center position of the internal gear
The vertical roll is rotated by the drive gear arranged at
It is characterized in that that.

According to a second aspect of the present invention, the negative of the vertical roll
The position where the load acts or the position where the load is expected to act
Immediately before the detection of biting of the material to be rolled or
Install a sensor that can predict
Stop the rotation drive of the drive unit and idle the vertical roll.
It is good to be constituted so that it may be made .

[0010]

[0011]

According to the vertical roll driving device of the present invention having the above-described configuration, the rotational driving force of the vertical roll is transmitted from the inside of the vertical roll, and therefore, unlike the conventional device for transmitting the rotational driving force from the surface of the vertical roll. As a result, the surface of the vertical roll is not affected by dirt and abrasion caused by dirt, so that the vertical roll can be reliably rotated. Therefore, when the material to be rolled bites into the vertical roll, the rotation peripheral speed of the vertical roll can be rotated so as to match the running speed of the material to be rolled. In addition, the surface of the vertical roll and the material to be rolled can be prevented from being scratched or unevenly worn. In addition, since the driving device is provided in the shaft portion supporting the vertical roll, the vertical roll chock can be used with almost no change in the conventional structure,
The structure is not complicated and the weight hardly increases.

Further, since the rotational driving force of the driving device can be transmitted to each other via a gear meshing with the internal gear of the vertical rolls, less transmission loss, rotational driving force is transmitted surely to the vertical rolls.

According to the vertical rolls driving apparatus according to claim 2, All you need to start the rotation of the vertical rolls before the material to be rolled is biting between the vertical rolls, the material to be rolled is bitten between the vertical rolls At the same time or immediately before, the state can be detected by a sensor and the vertical roll can be automatically switched to the idle state.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vertical roll driving device for a universal rolling mill according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a universal rolling mill provided with a vertical roll driving device according to the present embodiment, as viewed from an outlet side of a material to be rolled, and a part of the rolling mill is omitted. FIG.
1 is a right side view of the rolling mill of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. 4 is an enlarged sectional view of a portion A of FIG.

As shown in FIG. 1, a universal rolling mill 1
When viewed from the front side of the exit side of the H-section steel C, a pair of upper and lower horizontal rolls 2.2 and right and left arranged on an axis M (FIG. 4) orthogonal to the axis L of these horizontal rolls 2.2 A pair of vertical rolls 3 are rotatably provided in the housing 4. As shown in FIG. 2, each horizontal roll 2 is axially mounted on a corresponding horizontal roll chock 5, and the upper horizontal roll chock 5 is lowered by a pressing-down device 6, and the lower horizontal roll chock 5 is driven by a lifting device 6 by a housing 4.
Is configured to be vertically movable.

Each of the vertical rolls 3 is arranged on a corresponding vertical roll chock 7, and the vertical roll chock 7 is exchangeably mounted on the housing 4. As shown in FIG. 3, the vertical roll chock 7 has a substantially rectangular shape in a plan view, has a U-shaped opening 7a formed on one side thereof, and a part of the vertical roll 3 projects outward and is supported in the opening 7a. I have. On one side (right side in FIG. 3) of the vertical roll chock 7, the base ends of the guides 8 are freely deployable with the tips of the pair of guides 8.8 facing the vertical roll 3 with the protrusion of the vertical roll 3 interposed therebetween. Support shaft 8
The guide 8 is arranged so that the tip of the guide 8 is close to the surface of the vertical roll 3 with a fastener such as a bolt (not shown).

[0018] The vertical roll 3 is made from the annular of the roll body, as shown in FIG.
As shown in FIG. 3, an internal gear 9 is mounted on the inner peripheral surface via a key 9a so as to be integrally rotatable. As shown in FIG. 4, the inner peripheral surface of the vertical roll 3 is rotatably supported by an annular bearing 10, and the bearing 10 is supported by a support shaft 11 fixed to the vertical roll chock 7. A center hole 11a is formed in the center of the support shaft portion 11 in a vertical direction, and a rotating shaft 3a is rotatably supported by a bearing 3b in a lower portion in the center hole 11a. And this rotating shaft 3a
Above the center hole 11a, a hydraulic motor 12 as a driving device is disposed. The drive shaft of the hydraulic motor 12 is connected to the rotary shaft 3a, and a drive gear 13 is attached around the upper portion of the rotary shaft 3a so as to be integrally rotatable.

A pair of opposed gears 14 meshing with the driving gear 13 are rotatably supported on support shafts 14a fixed in the support shaft portion 11, respectively.
5 are connected so as to be integrally rotatable. A gear 16 that meshes with the gear 15 and also meshes with the internal gear 9 at the same time,
A pair of gears are rotatably supported by support shafts 16a fixed in a support sleeve 17 externally fitted to the support shaft portion 11, and the drive gear 13 is rotated by a hydraulic motor 12 as shown in FIG. The rotational force is transmitted to the internal gear 9 of the vertical roll 3 via the gears 14 and 15 and the pair of gears 16 in order, and the vertical roll 3 is configured to rotate via the key 9a. Further, a pipe 17 for supplying pressure oil to the hydraulic motor 12 extends rearward from the upper end of the hydraulic motor 12 through a space above the vertical roll 3. This pipe 1
A connecting coupler (not shown) is attached to one end of the pipe 7 and is detachably connected to a pipe from a hydraulic source when the vertical roll chock 7 is replaced. Reference numeral 18 in FIG. 4 is a support sleeve.

Although not shown, the vertical roll 3 has H
As a sensor for detecting a state in which a material to be rolled such as a section steel C is engaged, for example, a load cell is interposed between the vertical roll chock 7 and the housing 4, and when the load cell detects the engagement of the H section steel or at the entrance of the rolling mill. For example, a photo sensor is provided in the vicinity, the photo sensor detects the H-shaped steel, and at a time when the material to be rolled is expected to bite into the vertical roll, the supply circuit of the pressure oil to the hydraulic motor 12 is opened, Further, a controller (not shown) for stopping the rotation of the vertical roll 3 and simultaneously switching the vertical roll 3 to the idle state is incorporated. This is because, after the material C to be rolled has caught between the vertical rolls 3, there is no need to drive the vertical rolls 3, and if the rotation of the vertical rolls 3 is continued, This is because there is a minus side such as damaging the roll surface when a difference in rotation speed occurs.

Next, the manner of use of the vertical roll drive device of the present embodiment configured as described above will be described. In FIG. 1, a material C to be rolled such as an H-section steel is a vertical roll 3.3.
Before biting in between, vertical roll 3 (and horizontal roll 2)
Is rotated in advance, but the rotation speed of the vertical roll 3 (including the horizontal roll 2) is substantially equal to the running speed of the rolled material C when the rolled material C is engaged. Adjust the rotation speed. Then, at the same time as the rolled material C is bitten between the vertical rolls 3, the vertical rolls 3 are switched to the idle state as described above. Since there is no speed difference between the rolled material C and the rotating peripheral surface of the roll 3 when the rolled material C is engaged, no slippage occurs between the rolled material C and the roll 3 surface. In particular, according to the driving device of the present embodiment, the rotation of the hydraulic motor 12 changes the driving gear 13 → the pair of gears 14 and 14 → the integrated gears 15 and 15 →
The pair of gears 16, 16 → the internal gear 9 is transmitted in that order, and the vertical roll 3 rotates integrally via the key 9 a, so that the rotational driving force of the hydraulic motor 12 is transmitted reliably.
In addition, since all of the gears 9, 13 to 16 are arranged in a sealed state inside the vertical roll 3, it is prevented that the cooling water for the material to be rolled is splashed or dust enters. You.

While the embodiment of the vertical roll driving device has been described above, the vertical roll driving device of the present invention can also be implemented as follows.

1) Instead of the hydraulic motor 12, for example, an air motor or an electric motor can be used.

2) The number of reduction gears 14 to 16 between the drive gear 13 and the internal gear 9 is two (one pair) as in the embodiment.
But well, or it may be three or more, respectively.

3) Instead of the reduction gears 14 to 16, the rotational driving force may be transmitted using a chain or a belt.

[0026]

As is apparent from the above description,
The vertical roll driving device according to the present invention has the following effects.

(1) Since the rotational driving force is transmitted from the inside of the vertical roll, unlike the conventional device, the rotational driving force is reliably transmitted to the vertical roll without being affected by dirt or wear on the surface of the vertical roll. Therefore, the vertical roll can be rotated reliably and at a desired rotation speed. For this reason, the speed difference between the roll peripheral surface and the rolled material at the time of the biting of the material to be rolled can be eliminated, and the surface of the vertical roll and the material to be rolled can be prevented from being damaged.
The driving device is provided in a shaft portion that supports the vertical roll.
Since each unit is independent, various types of motors such as a hydraulic motor and an electric motor can be used regardless of the type. Further, since the driving device is arranged in the space inside the support shaft portion of the vertical roll, the vertical roll chock of the conventional structure can be used with almost no change, and the structure is not complicated and the weight is hardly changed.

(2) Further , since all the rotation of the driving device is transmitted to the internal gear of the vertical roll via the gear, the rotational driving force is reliably transmitted to the vertical roll, and there is no transmission loss of the driving force.

(3) In the vertical roll driving device according to the second aspect , since the sensor detects the biting of the material to be rolled into the vertical roll and the vertical roll automatically becomes idle, the vertical roll is generated during material rolling. It is necessary to control the rotation speed of the vertical rolls to be equal to the material speed of the material to be rolled for possible fluctuations in the rolling speed.

[Brief description of the drawings]

FIG. 1 is a front view of a universal rolling mill provided with a vertical roll driving device according to an embodiment of the present invention as viewed from an outlet side of a material to be rolled, and a part of the rolling mill is omitted.

FIG. 2 is a right side view of the rolling mill of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1 and shows a vertical roll chock.

FIG. 4 is an enlarged sectional view of a portion A in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Universal rolling mill 2 Horizontal roll 3 Vertical roll 3a rotating shaft 4 Housing 7 Vertical roll chock 9 Internal gear 9a key 10 Bearing 11 Support shaft part 12 Hydraulic motor 13-16 Gear 18 Support sleeve

Continuation of the front page (56) References JP-A-63-49313 (JP, A) JP-A-51-105959 (JP, A) JP-A-63-104711 (JP, A) JP-A-59-125402 (JP, A) , A) Fully open 1979-26635 (JP, U) Fully open 55-92404 (JP, U) Fully open 1984-73003 (JP, U) Fully open 1984-73004 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 35/00 B21B 13/10

Claims (2)

(57) [Claims] 1. A vertical roll drive device for a universal rolling mill comprising a pair of upper and lower horizontal rolls and a pair of left and right vertical rolls disposed on an axis perpendicular to the axis of these horizontal rolls. In the shaft supporting the vertical roll of the vertical roll chock,
A drive device for transmitting rotational driving force from the inside of the vertical roll is provided on the vertical roll, and internal teeth are provided on an inner peripheral surface of the vertical roll.
A wheel is provided so as to be integrally rotatable, and a plurality of
Is rotationally driven by the driving device through the gears and
By the driving gear arranged at the center position of the internal gear,
A vertical roll driving device for a universal rolling mill, which rotates a vertical roll. 2. A sensor that detects the biting of the rolled material or that is capable of predicting the biting of the rolled material is installed immediately before the position where the load of the vertical roll acts on or immediately before the position where the load is expected to act. A contractor configured to stop the rotation of the driving device after the detection of the sensor and idle the vertical roll.
The vertical roll driving device for a universal rolling mill according to claim 1 .