JPS6228010A - Crown adjuster for multi-stage cluster rolling mill - Google Patents

Abstract

PURPOSE:To permit the easy presetting of a crown adjustment by providing a reduction gear to a driving system which eccentrically displaces split back-up rolls so that the mechanism can be manually or motor-driven via the reduction gear. CONSTITUTION:An operator manually rotates a handle in the case of manually presetting a crown. A driving shaft 10b is then rotated and the revolution thereof is decelerated by the worm reduction gear 8d and is transmitted to an output shaft 8b by which a pinion 7b is rotated. Two rack bars 4b, thereupon, move in the directions opposite from each other and a selector lever 3b oscillates to rotate the quarter back-up roll 2b, by which the center of said roll is displaced and the crown adjustment of a work roll is executed. The driving shaft 10b is rotated by the driving of a motor and the crown adjustment is executed in the same manner as mentioned above in the case of adjusting the crown by the motor driving.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement of a crown adjustment device in a multi-stage cluster rolling mill having split reinforcing rolls.

<Prior art> A pair of upper and lower work rolls and a plurality of mediums 111 that support each work roll! In a multi-stage cluster rolling mill consisting of a roll and a plurality of reinforcing rolls supporting an intermediate roll,
In addition to dividing the reinforcing roll into a plurality of parts in the axial direction, all or some of the divided reinforcing rolls (hereinafter referred to as split reinforcing rolls) can be eccentrically displaced, and by eccentrically displacing these split reinforcing rolls, the work roll can be changed. A rolling mill in which the shape of the crown can be changed has been devised and put into practical use.

An example of a reinforcing roll split type multi-stage cluster rolling mill as described above is shown in FIG. The same figure (,) shows the front of the reinforcing roll part of the reinforcing roll split type multistage cluster rolling mill, the same figure (bl shows the side surface, and the same figure (e) shows the plane surface. Here, only the upper roll group is shown, but
The lower roll group has almost the same arrangement.

Ol is a work roll, and this work roll 01 has two -
It is supported by a set of intermediate rolls 02, and the intermediate roll 02 is supported by a plurality of reinforcing rolls 03, 03'. The front and rear reinforcing rolls 03゜03' in the rolling direction are divided into a plurality of split reinforcing rolls 03a, 0 symmetrically with respect to the center of the rolling line.
3b.

It is divided into 03c. In this example, the central split reinforcing roll 03a is removed (other split reinforcing rolls 03
b, 03c can be rotated eccentrically. In other words, these divided reinforcing rolls 03b and 03c are mounted on the reinforcing roll support shaft in a centered manner, and are rotated to adjust their position in the direction of the intermediate roll 02.

The mechanism that rotates the divided reinforcing rolls 03b and 03c, that is, the crown U! Conventional Ju devices (for example, JP-A-5
9-42103) has the following configuration.

Incidentally, since the crown adjusting devices provided in each of the divided reinforcing rolls 03b and 03c have the same structure, only the crown adjusting device provided in the divided reinforcing roll 03c will be described here.

A sector lever 04 is integrally attached to the end of each of the front and rear divided reinforcing rolls 03c. On the upper side of the front and rear split reinforcing rolls 03c (on the lower side in the case of the lower split reinforcing roll), two rack pars 05 are arranged parallel to the rolling direction so that the tooth surfaces face each other and are slidable in the longitudinal direction. The upper portions of the sector levers 04 are respectively engaged with pins 06 provided on these rack pars 05. One pinion 07 is meshed with the tooth surfaces of the facing rack pars 05. Therefore, when the pinion 07 is rotated, the two rack pars 05 slide in opposite directions,
Accordingly, the front and rear divided reinforcing rolls 03e rotate along with the sector lever 04, their centers are displaced, and the rolling blade acting on the intermediate roll 02 is changed.

The means for rotating the pinion 07 is divided reinforcing roll 03b depending on the amount of rotation.

Since it is necessary to also control the position of the hydraulic actuator 03c, a method is adopted in which the hydraulic actuator 09 is driven by a hydraulic unit 08 having a servo mechanism.

<Problems to be solved by the invention> As mentioned above, the conventional crown control in multi-stage cluster rolling mills with split reinforcing rolls employs a hydraulic mechanism with a servo mechanism, so that the load during rolling is reduced. Although it has the advantage of being adjustable at times, a hydraulic mechanism must be activated to preset the crown adjustment, and servo mechanisms require expensive hydraulic fluid maintenance and control equipment. There is a drawback.

The present invention has been made in view of the above-mentioned situation, and it is possible to easily preset the crown adjustment in a multi-stage cluster rolling mill having split reinforcing rolls, and it is also advantageous in terms of equipment costs. The purpose is to provide.

Means for Solving the Problems> The structure of the present invention for achieving the above object consists of a pair of upper and lower work rolls, an intermediate roll that supports the work rolls, and a reinforcing roll that supports the intermediate roll, and In a multi-stage cluster rolling mill in which a roll is divided into a plurality of parts along the axial direction and all or some of the divided reinforcing rolls can be eccentrically displaced, the drive system of the mechanism that moves the divided reinforcing rolls to displace the broken center. The crown adjusting device is provided with a reduction gear and allows the mechanism to be operated manually or driven by a motor via the reduction gear.

Embodiment Fig. 1 (c) shows a plane and front view of a rolling mill equipped with a crown adjustment device according to an embodiment of the present invention, and Fig. 2 (al (b) shows its main details). A cross section along the front and a cross section along the side are shown respectively.In addition, in this embodiment, the central reinforcing roll is divided into five parts, similar to the conventional one shown in Fig. 3. This is applied to a reinforcing roll split type rolling mill in which the other split reinforcing rolls (quarter reinforcing rolls, side reinforcing rolls) other than the split reinforcing rolls are eccentrically displaced.Quarter reinforcing roll C
The crown adjustment devices provided in the split reinforcing rolls located on both sides of the central split reinforcing roll) and the side reinforcing rolls (split reinforcing rolls located on both ends) have the same configuration, so the quarter reinforcing rolls are as follows: Only the crown adjustment device included in the Q-le will be explained in detail.

At the end of the quarter reinforcing roll 2b (located symmetrically with respect to the central split reinforcing roll), which is eccentrically and rotatably mounted on a support shaft (not shown) supported by the frame 1 of the rolling mill, The sector lever 3b is integrally connected. On the upper side of the front and rear quarter reinforcing rolls 2b (on the lower side in the case of the lower reinforcing roll), two rack pars 4b are provided parallel to the rolling direction, with tooth surfaces facing each other and slidable in the longitudinal direction. , the upper recess 6b of the sector lever 3b is connected to the pin 5b provided on these rack pars 4b.
are engaged with each other.

One pinion 7b is mounted on the tooth surface of the facing rack par 4b.
are interlocked. When the pinion 7b is rotated,
The two rack pars 4b slide in opposite directions, and accordingly the front and rear quarter reinforcing rolls 2b rotate eccentrically together with the sector lever 3b, their centers are displaced, and the rolling blade acts on the work roll via the intermediate roll. can be changed (see Figure 3 (bl)).

Each pinion 7b in the above mechanism equipped on the quarter reinforcing roll 2b located symmetrically is connected to the output shaft 9b of the worm reducer 8b installed above the pinion 7b.
is integrally attached to the Left and right worm reducer 8b
A drive shaft (input shaft) 10b is connected in an intermittent manner via a clutch Ilb. A motor (an electric motor, a hydraulic motor, etc.) 12b is connected to one end of the drive shaft 10b as a drive source for rotationally driving the drive shaft 10b.

The other end of the drive shaft 10b extends outside the rolling mill main body, and a mechanism 13b for manually operating the drive shaft 10b is equipped at that end.

The manual operation mechanism 13b includes a sprocket 14b attached to the end Ic of the drive shaft 10b, and a sprocket 14b attached to the end Ic of the drive shaft 10b.
A rotating shaft 15b supported parallel to the rotating shaft 15b, a sprocket 16b integrally attached to the rotating shaft 15b, and a chain 17b suspended between the sprockets 14b and 16b.
, and a handle 18b integrated with the rotating shaft 15b. By turning the handle 18b, the rotation is transmitted to the drive shaft 10b via the above-mentioned member.

The drive shaft 10b is provided with a rotation holding device (for example, a disc brake) 19b, a rotation angle indicator or a control sensor (for example, a PLG) 20b. In the figure, 2
1b is a joint connecting the drive shaft 10b.

As shown in FIGS. 1(a) and 1(c), the side reinforcing roll 2c is also provided with a crown adjusting device similar to the above. In the drawings, the same members are denoted by the same reference numerals with the suffix "C" instead of "b".

In the crown:A adjustment device described above, the crown can be preset by motor drive or manual operation. In the case of manual operation, the handle 18b of the operating mechanism 13b is manually rotated. handle 18
The rotation of b rotates the drive shaft 10b, and the rotation of the drive shaft 10b is decelerated by the worm reducer 8b and output shaft 9b.
, and the pinion 7b is rotated together with the output shaft 9b. As the pinion 7b rotates, the two rack pars 4b move in opposite directions, and the sector lever 3b, which is engaged with the rack par 4b via the pin 5b, swings, and the quarter reinforcing roll 2b rotates together with the sector lever 3b. and its center is displaced. In other words, the crown adjustment of the work roll is performed. And worm reducer 8b
The above state is maintained by the self-locking of the worm gear, and the crown adjustment is performed. In the case of such manual operation, the amount of rotation of the reinforcing roll 2b is measured by illumination using a scale display plate or the like as a rotation angle indicator linked to the drive shaft 10b. In the case of motor drive, crown adjustment and presetting are performed in the same manner as above by rotating the drive shaft 10b by driving the motor 12b. In this case, the amount of displacement of the reinforcing roll 2b is
This is done by detecting the number of rotations of the reinforcing roll using a sensor (PLG) linked to the reinforcing roll.

Note that since a clutch Ilb is provided between the left and right worm reducers 8b, the left and right quarter reinforcing rolls 2b can be operated independently by disconnecting the clutch Ilb.

The above presetting work for crown adjustment is the same for the side reinforcing rolls 2C.

In the above embodiment, the present invention is applied to a rolling mill in which the split reinforcing roll is mounted on the support shaft with the center broken, and the split reinforcing roll is directly rotated by a sector lever to displace the split center. Of course, the invention is not limited to this, and can also be applied to a rolling mill in which an eccentric sleeve is provided between the split reinforcing roll and the support shaft, and the eccentric sleeve is rotated by a sector lever.

<Effects of the Invention> According to the crown adjustment device according to the present invention, in a reinforcing roll split type rolling mill, crown adjustment can be easily preset by displacing the split reinforcing roll at its center, and moreover, the device configuration is It is also extremely simple, advantageous in terms of equipment cost, and easy to operate.

[Brief explanation of the drawing]

Fig. 1 fal (1) l tC) is a sectional view along the front, which is different from the plan view of a rolling mill equipped with an embodiment of the crown adjustment device according to the present invention, and Fig. 2 (a) fbl is Front sectional view and side sectional view of the main parts, Fig. 3 fa) (bl
[FIG. 1] A front view, a side view, and a plan view of a rolling mill equipped with a conventional crown adjustment device. In the drawing, 1 is the frame of the rolling mill, 2b, 2c are split reinforcing rolls, 3b, 3c are sector levers, 4b, 4c are rack bars 1, 7b, 7c are pinions, 8b, 8c are worm reducers, 10b, 10c is a drive shaft, 12b and 12c are motors, and 13b and 13c are manual operation mechanisms.

Claims (1)

[Claims] It consists of a pair of upper and lower work rolls, an intermediate roll that supports the work rolls, and a reinforcing roll that supports the intermediate roll, and the reinforcing roll is divided into a plurality of parts along its axial direction, and all or In a multi-stage cluster rolling mill in which some of the reinforcing rolls can be eccentrically displaced, a reducer is provided in the drive system of a mechanism for eccentrically displacing the divided reinforcing rolls, and the mechanism can be operated manually or by motor drive via the reducer. A crown adjustment device for a multi-stage cluster rolling mill, characterized in that: