JPH0249167B2 - ATSUENKINOROORUKUDOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an apparatus for driving the rolls of a rolling mill, and particularly to an apparatus for driving upper and lower rolls by separate drive machines.

[Background of the invention]

When connecting the roll and motor of a rolling mill, the outer diameter of the spindle coupling on the roll side is generally limited by the outer diameter of the work roll, so a gear type spindle coupling with a large transmission capacity is used. If the upper and lower rolls are driven by separate motors, the positions of the upper and lower motors will interfere, and the difference between the distance between the axes of the upper and lower rolls and the distance between the output shafts of the upper and lower motors will become large. becomes large, making it difficult to use a gear type spindle coupling (the angle of inclination that can be used with a gear type spindle coupling is small, within a few degrees). There is a method described in Japanese Utility Model Application Publication No. 11261/1983 that solves these problems. This is by connecting the output shaft of the motor and the drive spindle using an offset gear box to avoid interference between the upper and lower motors and to reduce the angle of inclination of the drive spindle. However, this method has a problem in that the moment of inertia due to the transmission gear increases and acceleration/deceleration performance deteriorates.

[Purpose of the invention]

An object of the present invention is to provide a roll drive device for a rolling mill that can connect the upper and lower rolls of a rolling mill to separate drive machines using gear type spindle couplings without reducing acceleration/deceleration performance. It is in.

[Summary of the invention]

The present invention achieves the above object by connecting the upper and lower rolls of a rolling mill to separate drive machines via a gear type spindle coupling, a connecting shaft supported by support means, and a universal joint. be. Here, the gear type spindle coupling is a drive spindle with a gear type spindle coupling provided on the shaft end, and the universal joint is a drive spindle with a universal joint provided on the shaft end.

According to the present invention, interference with the vertical drive machine is avoided by using a universal joint that can be used in a large range of inclination angles on the drive machine side where there is space to increase its outer diameter. A gear type spindle coupling is connected to the upper and lower rolls of the rolling mill through a connecting shaft supported by a support means, and this gear type spindle coupling is connected to the upper and lower rolls of the rolling mill. It becomes possible to use type spindle couplings in a small range of inclination angles. That is, it becomes possible to connect the upper and lower rolls of the rolling mill to separate drive machines using gear type spindle couplings without reducing acceleration/deceleration performance.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an overall side view of a rolling mill that is an embodiment of the present invention. The rolling mill main body 1 includes upper and lower work rolls 11, 21, and upper and lower work rolls 11, 21.
Upper and lower back-up rolls 1 supporting each
2, 22, and a housing 2 containing these roll groups. Upper work roll 1
1 is upper gear type spindle coupling 1
3. Upper connecting shaft 14, upper universal joint 1
5. It is connected to the upper motor 16 via an extension shaft 17 and a gear coupling 18, and is configured to be driven by the upper motor 16. The lower work roll 21 is configured to be driven by a lower motor 26 via a lower gear type spindle coupling 23, a lower connecting shaft 24 and a lower universal joint 25. FIG. 2 is a diagram showing details of the upper and lower gear type spindle couplings 13, 23. A roll-side inner cylinder 33 is inserted so as to mesh with the gear part inside the roll-side outer cylinder 31, and a bellows 33 is provided between the outer cylinder 31 and the inner cylinder 33 to prevent lubricating oil from scattering. There is. One end of an intermediate shaft 34 is connected to the inner cylinder 33, and the other end of the intermediate shaft 34 is provided with a motor-side inner cylinder 35, a bellows 36, and a motor-side outer cylinder 37, similar to the roll side. . This gear type spindle coupler has excellent power transmission ability, so it can improve the power transmission ability of the drive system by using it on the roll side where the outer diameter of the spindle coupler is limited by the roll diameter. .
3 and 4 are views showing details of the support device for the upper and lower connecting shafts 14, 24. FIG. Connecting shaft support device 4
0 is a case in which an upper case 41, a middle case 42, and a lower case 43 are integrated with bolts 46. The upper connecting shaft 14 is held between the upper case 41 and the middle case 42 via a bearing 44. The lower connecting shaft 24 is held between the middle case 42 and the lower case 43 via a bearing 45. Covers 47 and 48 are provided on both sides of the case. FIG. 5 is a diagram showing details of the universal joint, which is composed of a roll side boss 51, a roll side cross joint 52, an intermediate shaft 53, a motor side cross joint 54, and a motor side boss 55. Although this universal joint has inferior power transmission ability when the outside diameter is the same as that of a gear type spindle coupling, it has the advantage of being usable over a large range of inclination angles. Incidentally, since this universal joint is used on the motor side where the outer diameter of the spindle coupling is not limited, a reduction in power transmission capability can be avoided by increasing the outer diameter. Further, the outer diameter of the roll side of the universal joint is increased by tilting the gear type spindle coupling within a range that does not interfere with use.

According to the embodiments described above, it is possible to connect the upper and lower work rolls of a rolling mill to individual motors by means of gear-type spindle couplings, without using an offset gearbox. Therefore, it is possible to fully utilize the excellent power transmission ability of the gear type spindle coupling relative to the outer diameter, and since no offset gearbox is used, acceleration/deceleration performance is improved, leading to improved rolling efficiency. is planned. Furthermore, maintenance and inspection of the offset gearbox, which was necessary in the past, is no longer necessary, and the entire drive device is simplified, making maintenance and inspection extremely easy. Additionally, the area of the installation building can be reduced.

Next, other embodiments of the present invention will be described.

In this embodiment, the connecting shaft support device 400 is
As shown in the figure and FIG. 7, the distance between the upper and lower connecting shafts is variable. In other words, in a rolling mill where the vertical movement of the upper and lower work rolls is large,
This prevents the angle of inclination of the gear type spindle coupling from becoming large. The connecting shaft support device 400 supports the upper connecting shaft 14 via a bearing 44.
The upper support stand 49 that holds the lower connection shaft 24, the lower support stand 410 that similarly holds the lower connection shaft 24, the upper support stand 49 and the lower support stand 410
A column 412 that slides and guides the holder in the vertical direction via a bush 411, an upper holder 49, a lower holder 410
It is composed of cylinders 413 and 414 that move up and down. 8 and 9 are overall side views of a rolling mill to which this connecting shaft support device 400 is applied, and the same members as in FIG. 1 are designated by the same symbols. FIG. 8 shows a state where the thickness of the rolled material 3 is thin;
FIG. 9 shows a state in which the rolled material 3 is thick. As can be seen from FIGS. 8 and 9, the upper and lower connecting shafts are
By changing the gap between the upper and lower gear type spindle couplings 13 and 24, the upper and lower gear type spindle couplings 13 and 23 can be used with a small angle of inclination. At this time, since the inclination angle of the upper and lower universal joints 15, 25 changes, the length in the horizontal direction also changes, but this length change is caused by the two axes of the intermediate shaft 53 of the universal joint shown in FIG. Compensation can be achieved by spline connection.

The vertical movement of the upper and lower connecting shafts 14 and 24 is controlled by upper and lower gear type spindle couplings 13 and 24.
When synchronizing with the vertical movement of , it is more effective to perform the control as shown in FIG. The positions of the upper and lower work rolls 11 and 21 are detected by upper and lower work roll position detectors 101 and 102 installed in the housing 2, respectively. This detected value is input to the calculation device 4, and the command calculated by the calculation device 4 is sent to the cylinders 413, 4
Solenoid valves 415, 416 that operate 14
Output to. Therefore, when the roll diameter changes or the thickness of the rolled material changes, for example, when the thickness of the rolled material increases, the upper and lower work rolls 1
The positions of 1 and 21 are moved to the side where the gap becomes larger, and the gear type spindle coupling 13,
The inclination angle of 23 increases, but this inclination angle changes because the cylinders 413, 414 are operated by the above-mentioned control system so that the distance between the upper and lower supports 49, 410 increases in synchronization with the gap between the rolls. There's nothing to do. That is, the gear-type spindle coupling that connects the connecting shaft to the work roll can be used in a small range of inclination angles at all times because the connecting shaft moves in sync with the movement of the work roll. In the above-described embodiment, a cylinder is used as a means for moving the upper and lower supports, but an electric motor may also be used.

FIGS. 11 to 13 are diagrams showing examples in which the above embodiment is applied to various types of rolling mills. 1st
Figure 1 shows an example of application to a two-high rolling mill, which also has upper and lower work rolls 11, like the four-high rolling mill described above.
The upper and lower connecting shafts 14 and 24 move in synchronization with the movement of 21, and the upper and lower gear type spindle couplings 1
3 and 23 can be used in a small range of inclination angles. FIG. 12 shows an example applied to a 5-high rolling mill, and FIG. 13 shows an example applied to a 6-high rolling mill. Like the four-high rolling mill described above, these can also use gear type spindle couplings within a small range of inclination angles. Although the above-mentioned rolling mill has been described using a work roll drive system as an example, the above-described embodiment can be applied to a back-up roll drive system, and similar effects can be obtained. Further, in a rolling mill in which work rolls are shifted, the above embodiment can be applied by configuring a gear type spindle coupling as shown in FIG. 14, for example. A roll-side inner cylinder 302 is inserted inside the roll-side outer cylinder 301, and an intermediate shaft 303 is attached to the gear-shaped outer periphery of the inner cylinder 302 so as to be able to reciprocate. Further, the intermediate shaft 303 has a motor side inner cylinder 304.
are fastened together, and the inner cylinder 304 is connected to the motor side outer cylinder 3.
It is inserted in 05. Inside the inner cylinder 302,
Spring guides 307, 308, 309, and 310 are inserted to support the rod 306 passing through the inner cylinder 302, and springs 311, 312, and 313 are loaded between these spring guides. A support member 31 is provided between the inner cylinder 304 and the inner cylinder 304.
9 is provided. A ring 322 and a nut 323 are attached to the motor side of the rod 306 to adjust the biasing force of the spring. The outer cylinder 301 is provided with a plate 314 and a button 315 located at the center thereof, and the button 315 is in contact with one end of the rod 306. In addition, the outer cylinder 3
05 is provided with a plate 316 and a button 317 located in the center of the plate 316.
17 is in contact with a button 318 provided on the inner cylinder 304. Outer cylinder 301, inner cylinder 302, outer cylinder 30
5 and the inner cylinder 304 are each provided with a bellows 32.
0,321 is provided. By configuring the gear type spindle coupling in this way, when the roll shifts, the inner cylinder 302 slides within the intermediate shaft 303, and accordingly, the rod 3
06 also moves. At this time, springs 311, 312,
Although the length of 313 changes accordingly, it always includes the support member 319, the inner cylinder 304, the buttons 318, 317,
A pressing force is applied to the roll via the plate 316 and the outer cylinder 305. That is, the gear type spindle coupling can change its length to follow the shift of the rolls. Therefore, by using a gear-type spindle coupling that has such a simple structure and can follow the shift of the rolls, it becomes possible to apply the above-described embodiment to a roll shift rolling mill. It should be noted that the gear type spindle coupling that can follow the shift of the rolls is not limited to those mentioned above, and the above-described embodiments can be applied to, for example, conventionally used ones.

According to the above-described embodiment of the present invention, the upper and lower connecting shafts are movable, so that in a rolling mill in which the amount of vertical movement of the rolls is large, that is, in a rolling mill in which the distance between the upper and lower work rolls changes greatly, it is possible to It is possible to use gear type spindle couplings that were previously impossible to use. In other words, since the upper and lower connecting shafts move in synchronization with the movement of the work rolls, the inclination angle of the gear type spindle coupling can be kept constant or suppressed to small changes, and the inclination angle is always small. can be in the state of Therefore, it is possible to use a gear type spindle coupling which has excellent power transmission ability, and this also makes maintenance and inspection extremely easy.

〔Effect of the invention〕

According to the present invention described above, the upper and lower rolls of a rolling mill can be connected to individual drive machines using gear type spindle couplings without deteriorating acceleration/deceleration performance, thereby improving power transmission capability. I can do it.

[Brief explanation of drawings]

Fig. 1 is an overall side view of a rolling mill to which a roll drive device of a rolling mill is applied, which is an embodiment of the present invention, Fig. 2 is a detailed view of a gear type spindle coupling, and Fig. 3 is a detailed view of a connecting shaft support device. 4 is a cross-sectional view taken along the arrow in FIG. 3, FIG. 5 is a detailed view of the universal joint, and FIG. 6 is a detailed view of a connecting shaft support device applied in another embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the arrow in FIG. 6, FIGS. 8 and 9 are side views of the entire rolling mill to which other embodiments of the present invention are applied, and FIG. 10 is a vertical movement of upper and lower work rolls and upper and lower supports. System diagram of synchronization device for vertical movement of the table, No. 11
13 are side views of various rolling mills to which other embodiments of the present invention are applied, and FIG. 14 is a detailed view of a gear type spindle coupling. 11... Upper work roll, 21... Lower work roll, 13... Upper gear type spindle coupling, 23... Lower gear type spindle coupling, 14... Upper connecting shaft, 24... Lower connecting shaft, 15... ...Upper universal joint, 25...
...Lower universal joint, 16...Upper motor, 26...Lower motor, 40...Connection shaft support device.

Claims (1)

[Scope of Claims] 1. In a roll drive device for a rolling mill in which rolling rolls located above and below a rolled material are driven by separate drive machines, supporting means are provided between the upper and lower rolls and the drive machines, respectively. an upper and lower gear type spindle coupling that connects one end of the upper and lower connection shafts to the upper and lower rolls, and an upper and lower universal joint that connects the other end of the upper and lower connection shafts to the drive machine, respectively; A roll drive device for a rolling mill, comprising: 2. The roll drive of a rolling mill according to claim 1, wherein the vertical position of the upper and lower connecting shafts supported by the support means is adjustable so as to be synchronized with the positions of the upper and lower rolls. Device. 3. Claim 2, comprising: means for measuring the position of the upper and lower rolls; and means for moving the upper and lower connecting shafts up and down based on the measurement results to adjust the position of the upper and lower connecting shafts. A roll drive device for a rolling mill characterized by: 4. A roll drive device for a rolling mill according to claim 1, characterized in that the upper universal joint and the drive device are connected via an extension shaft.