JPS6037205A - Roll driving device of rolling mill - Google Patents

Abstract

PURPOSE:To prevent the performance of speed regulation from lowering and to improve the capability of power transmission by connecting each of upper and lower rolls to an independent driver through a gear-type spindle coupling, a connecting shaft, and a universal joint. CONSTITUTION:Upper and lower work rolls 11, 21 of a mill main body 1 are connected to independent drivers 16, 26 through upper and lower gear-type spindle couplings 13, 23, upper nd lower connecting shafts 14, 24 supported by supporting means, and upper and lower universal joints 15, 25, respectively. Further, the positions of shafts 14, 24 in the vertical directions are made freely adjustable so as to synchronize with the positions of roll 11, 21, and are adjusted in accordance with the detected results of the positions of rolls 11, 21.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a device for driving rolls of a rolling mill.
The present invention relates to a device that drives upper and lower rolls using separate drive machines.

[Background of the invention]

When connecting the roll and motor of a rolling mill, the outer diameter of the roll side spindle coupling 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 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, resulting in a large spindle inclination angle. This makes 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. 55-11261 that solves these problems. This is achieved by connecting the motor output shaft and drive spindle using an offset gearbox.
This avoids interference between the vertical motors and reduces the tilt angle of the drive spindle. However, with this method,
There is 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 is capable of connecting the upper and lower rolls of a rolling mill to separate drive machines using a one-yard spindle coupling without reducing acceleration/deceleration performance. There is a particular thing.

[Summary of the invention]

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

According to the present invention, 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, interference with the vertical drive machine is avoided, and the universal joint is supported by the universal joint. The gear type spindle coupling is connected via the connecting shaft supported by the means, and the gear type spindle coupling is connected to the upper and lower rolls of the rolling mill, so the gear type spindle cup can be connected without using an offset gear box. It becomes possible to use the ring 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,
It is composed of upper and lower backup rolls 12 and 22 that support the upper and lower work rolls 11 and 21, respectively, and a housing 2 that encloses these roll groups. The upper work roll 11 is connected to the upper motor 16 via an upper gear type spindle coupling 13, an upper connection M 14 , an upper universal joint 15, an extension shaft 17 and a gear coupling 18, and is driven by the upper motor 16. It is configured. The lower work roll 21 has a lower gear type spindle coupling 23 and a lower connecting shaft 24.
and the lower motor 2 via the lower universal joint 25.
6. FIG. 2 is a diagram showing details of the upper and lower gear type spindle coupling 13.23. The roll side inner cylinder 33 is inserted so as to mesh with a part of the gear inside the roll side outer cylinder 31, and this outer cylinder 3
A bellows 33 is provided between 1 and the inner cylinder 33 to prevent lubricating oil from scattering. 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, just as on the roll side. There is. Since this gear type spindle coupling has excellent power transmission ability, it is possible to improve the power transmission ability of the drive system by using it on the roll side where the outer diameter of the spindle coupling is limited by the roll diameter. 3 and 4 show details of the support device for the upper and lower connecting shafts 14.24. ``The connecting shaft support device 40 is constructed by integrating an upper case 41, a middle case 42, and a lower case 43 with bolts 46. The upper connecting shaft 14 is held between the upper case 41 and the middle case 42 via a bearing 44. A bearing 4 is installed between the middle case 42 and the lower case 43.
The lower connecting shaft 24 is held via the lower connecting shaft 5. cover 47
．． 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 post 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 a lower power transmission ability than a gear type spindle coupling at the same outer diameter, it has the advantage of being usable over a wide range of inclination angles. This universal joint is used on the motor side where the outer diameter of the spindle coupling is not limited. Therefore, a decrease in power transmission capacity can be avoided by increasing the outer diameter. Furthermore, 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 embodiment described above, it is possible to connect the upper and lower work rolls of a rolling mill to individual motors by gear type spindle couplings without using an offset gear box. 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. It will be done. Furthermore, there is no need for maintenance and inspection of the offset gearbox, which was necessary in the past, 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 configured so that the distance between the upper and lower connecting shafts is variable as shown in FIGS. 6 and 7. That is, in a rolling mill in which the vertical movement of the upper and lower work rolls is large, the inclination angle of the gear type spindle coupling is prevented from becoming large. The connection shaft support device 400 includes an upper support 49 that holds the upper connection shaft 14 via a bearing 44, a lower support 410 that similarly holds the lower connection shaft 24, and a bush 411 that connects the upper support 49 and the lower support 410. A column 412 that slides and guides in the vertical direction via
, and cylinders 413 and 414 that move the upper holder 49 and the lower holder 410 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 in which the rolled material 3 is thin, and FIG. 9 shows a state in which the rolled material 3 is thick. This figure 8 and 9
As can be seen from the figure, by changing the gap between the upper and lower connecting shafts 14°24 in accordance with the gap between the upper and lower work rolls 11.
．． 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. This can be compensated by spline connection.

When the vertical movement of the vertical connecting shaft 14.24 is synchronized with the vertical movement of the vertical gear type spindle coupling 13.24, it is more effective to perform the control as shown in FIG. 10.

The positions of the upper and lower work rolls 11 and 21 are respectively 7%.
, 102. This detected value is calculated by the calculation unit 4.
The commands inputted to and calculated by the calculation device 4 are sent to the solenoid pulp 4 that operates the cylinders 413 and 414.
15,416. 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 11°21
The position of the cylinders 413 and 414 moves to the side where the gap becomes larger, and the angle of inclination of the carrier type spindle coupling 13.23 becomes larger. , 410 is operated so as to increase in synchronization with the gap between the rolls, so it does not change. 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. Figure 11 shows an example applied to a two-high rolling mill, in which the upper and lower connecting shafts 14 and 24 move in synchronization with the movement of the upper and lower work rolls 11°21, similar to the above-mentioned four-high rolling mill, and are of the upper and lower gear type. The spindle coupling 13.23 can be used in a small range of angles of inclination. 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. These can also use gear type spindle couplings in a small range of inclination angles, similar to the above-mentioned four-high rolling mill. In addition, although the above-mentioned rolling mill was explained by taking the work roll drive method as an example, the above-mentioned embodiment can be applied to the backup roll drive method, and the same effects can be obtained. Further, the above embodiment can be applied to a rolling mill in which work rolls are shifted 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 reciprocatably mounted on the gear-shaped outer periphery of the inner cylinder 302. Further, a motor-side inner cylinder 304 is fastened to the intermediate shaft 303, and the inner cylinder 304 is inserted into a motor-side outer cylinder 305. Spring guides 307, 308, 309, and 310 are inserted inside the inner cylinder 302 to support a rod 306 passing through the inner cylinder 302.
Between these spring guides are springs 311, 312, 31.
3 is loaded, a support member 319 is provided between the spring guide 310 and the inner cylinder 304. 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 includes a button 314 and a button 3 located in the center thereof.
15 is provided, and the button 315 abuts one end of the rod 306. In addition, the outer cylinder 305 has a plate 3.
16 and a button 317 located at the center thereof, and the button 317 of the toilet is in contact with a button 318 provided on the inner cylinder 304. outer cylinder 301 and inner cylinder 302,
A bellows 3 is provided between each of the outer cylinder 305 and the inner cylinder 304.
20°321 is provided. By configuring the gear type spindle coupling in this manner, when the roll shifts, the inner cylinder 302 slides within the intermediate shaft 303, and the rod 306 also moves accordingly. At this time, the lengths of the springs 311, 312, and 313 change accordingly, but the lengths of the springs 311, 312, and 313 always change with the support member 319, the inner cylinder 304, and the button 318.
, 317, the plate 316, and the outer cylinder 305 to apply a pressing force to the roll. 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 can follow the shift of the rolls with such a simple structure, the above-described embodiment can be applied to a roll shift rolling mill. Similarly, the gear type spindle coupling that can follow the shift of the rolls is not limited to those mentioned above, and the above embodiments can be applied to conventionally used gear type spindle couplings, for example.

According to the embodiment of the present invention described above, 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 overcome the conventional limitation on the inclination angle. It is possible to use gear type spindle couplings that were otherwise 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 by fanning 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 an o-le drive device for 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 connecting shaft support device. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a detailed view of the universal joint, and FIG. 6 is a connecting shaft support device applied in another embodiment of the present invention. 7 is a detailed view of the
9 and 9 are side views of the entire rolling mill to which another embodiment of the present invention is applied, FIG. 10 is a system diagram of a synchronizing device for the vertical movement of the upper and lower work rolls and the vertical movement of the upper and lower supports, and FIGS. 11 to 13 1 is a side view of various rolling mills to which other examples of actual bars of the present invention are applied;
Figure 4 is a detailed view of the gear type spindle coupling. 11... Upper work roll, 21... Lower work roll, 13... Upper gear type spindle coupling,
23...lower gear type spindle coupling, 1
4... Upper connecting shaft, 24... Lower connecting shaft, 15... Upper universal joint, 251... Lower universal joint, 16... Upper motor, 26... Lower motor,
40 豫6118 Soul 7 diagram ■Two tiles / 3 diagrams

Claims (1)

[Claims] 1. A roll drive device for a rolling mill in which rolling rolls positioned above and below, sandwiching a rolled material, are driven by separate drive machines,
A vertical connection shaft provided between the upper and lower rolls and the drive machine and supported by a support means, 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 the upper and lower connection. A roll drive device for a rolling mill, comprising upper and lower universal joints that respectively connect the other end of a shaft and the drive machine. 2. The roll of a rolling mill according to claim 1, characterized in that 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. Drive device. 3. Claim 2, further 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, comprising: 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.