JP3603702B2 - Rolling roll brake torque applying device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rolling roll brake torque applying device for applying a brake torque to a rolling roll in order to absorb backlash of a rotary driving force transmitting mechanism for transmitting a rotary driving force to the rolling roll.
[0002]
[Prior art]
Conventionally, as a device that absorbs backlash of a rotational drive transmitting mechanism such as a gear mechanism or a coupling that transmits a rotational drive to a rolling roll, for example, as disclosed in JP-A-62-77108, A brake motor provided on the roll via a sprocket is driven to apply a brake torque to the rotational driving force transmission mechanism, thereby absorbing backlash such as a gear mechanism backlash and causing a shock when the rolled material is bitten. A brake shoe is provided on the exit side of the rolling mill so as to be able to move forward and backward, and the brake shoe is moved forward to contact the upper and lower rolling rolls as described in Japanese Patent Application Laid-Open No. Hei 6-07371. By contacting the upper and lower rolling rolls, a braking torque is applied to the upper and lower rolling rolls. Those so as to prevent phase deviation is known.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional backlash absorbing device, it is necessary to consider not only the timing of applying the brake torque, but also the inconvenience that the structure of the device is complicated and the cost is increased.
The present invention has been made to solve such inconveniences, and it is not necessary to consider the timing of applying the brake torque, and it is possible to reduce the cost with a simple structure by applying a brake torque to a rolling roll. It is intended to provide a device.
[0004]
[Means for Solving the Problems]
To achieve the above object rotation, braking torque applying device for rolling rolls according to claim 1, by the rotation drive force transmission mechanism to absorb the backlash of the rotation drive force transmission mechanism for transmitting the rotation driving force to the rolling roll A rolling roll brake torque applying device that applies a braking torque to a rolling roll to which a driving force is transmitted, and is provided at both ends in the axial direction of the rolling roll so as to be integrally rotatable with the rolling roll. An impeller for generating rotation resistance by separating the supplied cooling liquid is provided.
[0005]
Rolling roll brake torque applying device according to claim 2, in claim 1, wherein the rolling rolls, lubrication of the roll bearings a rolling roll used in the four-roll rolling mill to perform an oil air or oil mist, the A seal member for preventing the cooling water from entering the roll bearing is provided on an end face of the rolling roll .
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a sectional view of an essential part showing a state in which an impeller as an example of an embodiment of the present invention is attached to both axial ends of a rolling roll of a four-roll rolling mill. FIG. 2 shows a state where the impeller is attached to an outer peripheral portion of a flinger. FIG.
[0007]
First, a description will be given of a four-roll rolling mill. In FIG. 1, reference numeral 1 denotes a fixed shaft, and a cylindrical rotary shaft 3 is rotatably fitted to the fixed shaft 1 via a roll bearing 2. A rolling roll 4 and a pair of flinger 5 are externally fitted and fixed to the rotating shaft 3. The flinger 5 is disposed at each of both ends in the axial direction of the rolling roll 4, and has a cylindrical portion 6 fitted and fixed to the rotating shaft 3 and a flange portion 7 provided at an end on the rolling roll 4 side. Is provided. The flange portion 7 is in contact with the end face of the rolling roll 4, and faces the side wall 8 a of the housing 8 which is disposed on both ends in the axial direction of the rolling roll 4 and is substantially parallel to the end face of the rolling roll 4. Between the side wall 8a of the housing 8 and the flange portion 7 of the flinger 5, a sealing member 9 for sealing between the end face of the rolling roll 4 and the roll bearing 2 is attached.
[0008]
Further, an annular plate-shaped impeller (a plurality of protrusions (here, square protrusions)) provided at predetermined intervals (here, equal intervals) in the circumferential direction on the outer peripheral portion of the flange portion 7 of the flinger 5. Rolling roll brake torque applying device) 11 is integrally attached to flange portion 7. The impeller 11 is disposed between the end face of the rolling roll 4 and the side wall 8 a of the housing 8, and the tip of the projection 10 is located radially inward of the rolling face of the rolling roll 4. The side wall 8b of the housing 8, which is radially outward from the tip of the projection 10, is disposed farther from the end face of the rolling roll 4 than the side wall 8a, and a step is formed between the side wall 8a and the side wall 8b.
[0009]
Then, the rotational driving force of a driving source (not shown) is transmitted to the rotating shaft 3 via a rotational force transmitting mechanism (not shown) such as a gear mechanism or a coupling, and thereby, the rolling roll 4 The roll bearing 2 is rotationally driven integrally with the jar 5 and the impeller 11, and the roll bearing 2 is lubricated by oil air or oil mist, so that the roll bearing 2 side of the seal member 9 is in a high pressure region. A large amount of cooling water is supplied.
[0010]
At this time, the cooling water is swept by the projections 10 of the rotating impeller 11, and a braking torque is applied to the rolling roll 4 by rotation resistance generated in the impeller 11 at the time of the swaging, thereby absorbing backlash such as backlash of the gear mechanism. Then, a substantially uniform driving force is transmitted to the four rolling rolls 4 from the time of biting of the material to be rolled to the time of removal of the material. As a result, for example, when transmitting the driving force from one driving source to a plurality of rolling rolls, It is possible to prevent the drive system from being broken due to the drive force being concentrated on one of the rolls and the torque being not transmitted to the other rolls, thereby improving the life of the drive system. In the steel bar rolling, the node pitch is equalized and the quality can be improved.
[0011]
Further, since a negative pressure region is formed in a portion where the cooling water is separated by the projection 10 of the rotating impeller 11, it is possible to prevent the cooling water from entering the high pressure region on the roll bearing 2 side via the seal member 9. As a result, the sealing performance of the sealing member 9 can be maintained satisfactorily, and the lubrication of oil air or oil mist can be improved because the negative pressure region reduces the back pressure. Even when the seal member 9 is damaged, the cooling air enters through the seal member 9 into the high-pressure region of the roll bearing 2 because oil air or oil mist flows out of the high-pressure region of the roll bearing 2 into the negative pressure region. Can be prevented.
[0012]
As described above, in this embodiment, when the cooling water is swept by the projections 10 of the rotating impeller 11, a braking torque is applied to the rolling roll 4 by the rotation resistance generated in the impeller 11, and the backlash of the gear mechanism is reduced. Therefore, it is not necessary to consider the timing of applying the brake torque, and the cost of the apparatus can be reduced with a simple structure.
[0013]
In the above embodiment, the case where the impeller 11 is attached to the rolling roll of a four-roll rolling mill is taken as an example. However, the present invention is not limited to this. For example, the rolling roll of a normal rolling mill and the rolling of a two-roll rolling mill are used. The impeller 11 may be attached to a roll or a rolling roll of a three-roll rolling mill.
Further, in the above embodiment, the annular plate-shaped impeller 11 provided with the plurality of protrusions 10 at predetermined intervals in the circumferential direction is taken as an example, but the shape of the impeller does not necessarily need to be this way. It can be changed as appropriate within a range in which a braking torque can be applied to the rolling roll 4 by the rotational resistance when the cooling water is swept.
[0014]
Further, in the above embodiment, the case where the impeller 11 is attached to the outer peripheral portion of the flange portion 7 of the flinger 5 is taken as an example. However, the present invention is not limited to this, and the impeller may be directly attached to the end face of the rolling roll 4. Alternatively, when the flinger 5 is not used, an impeller may be attached to the rotating shaft 3.
[0015]
【The invention's effect】
As is apparent from the above description, according to the first aspect of the present invention, when the cooling liquid is swept by the rotating impeller, a braking torque is applied to the rolling rolls by the rotational resistance generated in the impeller, thereby transmitting the rotational driving force. Since the backlash is absorbed, it is not necessary to consider the timing of applying the brake torque, and it is possible to reduce the cost of the apparatus with a simple structure.
[0016]
According to the second aspect of the present invention, in addition to the first aspect, the negative pressure region is formed in a portion where the cooling liquid is swept by the rotating impeller. Can be prevented from entering, and as a result, the sealing performance of the sealing member can be maintained well, and the lubricating property of oil air or oil mist is improved because the negative pressure region reduces the back pressure. Further, even when the seal member is broken, since oil air or oil mist flows out from the high-pressure region on the roll bearing side to the negative pressure region, cooling is performed through the seal member to the high-pressure region on the roll bearing side. The effect that water can be prevented from entering can be obtained.
[Brief description of the drawings]
FIG. 1 is an essential part cross-sectional view showing a state in which an impeller as an example of an embodiment of the present invention is attached to both axial ends of a rolling roll of a four-roll rolling mill.
FIG. 2 is a plan view showing a state where an impeller is attached to an outer peripheral portion of a flinger.
[Explanation of symbols]
2 ... Roll bearing 4 ... Rolling roll 9 ... Seal member 11 ... Impeller (rolling roll brake torque applying device)

Claims (2)

In the rotational driving force braking torque applying device for rolling rolls to impart braking torque to the rolling roll rotation driving force is transmitted by said rotational drive power transmitting mechanism to absorb the backlash of the transmission mechanism for transmitting the rotational driving force to the rolling roll So,
A roll provided with impellers provided at both ends in the axial direction of the roll so as to be able to rotate integrally with the roll, and generating a rotational resistance by pushing a cooling liquid supplied to the roll; Brake torque applying device. The rolling roll is a rolling roll used in a four-roll rolling mill that lubricates a roll bearing with oil air or oil mist, and prevents an end face of the rolling roll from infiltrating the cooling water into the roll bearing. The brake torque applying device for a rolling roll according to claim 1, wherein a sealing member is provided.

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