JPS6312687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll cross drive device for a roll cross type rolling mill.

In recent years, requirements for thickness accuracy in the width direction of rolled products have become increasingly strict.Currently, this is countered by adding an initial crown to the roll in order to cancel the deflection of the roll due to the rolling load. When rolling conditions such as sheet width and thickness change drastically, it is necessary to keep and replace rolls with many different types of initial crowns, which reduces the operating rate due to roll replacement. In addition, the crown of the roll changes due to wear and thermal expansion of the roll as the rolling process progresses, so there has been a need for a means to control the thickness profile of a rolled plate in the width direction without replacing the roll.

Therefore, as a control method, a work roll bending method has been developed and has shown some success, but with this method, there is a limit to the bending that can be applied to the work roll due to the strength of the roll neck of the work roll. It is not possible to obtain sufficient ability to correct the thickness shape in the width direction, and especially when the width of the rolled material is narrow relative to the roll length, the contact areas at both ends of the back-up roll and work roll become a nuisance. Unable to fully achieve desired results.

Therefore, in order to eliminate the above-mentioned drawbacks of conventional rolling mills, the present applicant has developed a technology that enables control of the thickness shape of a rolled plate material over a wide range of width directions using the same roll, and that also extends the life of the rolls. Specifications and drawings of Japanese Patent Application No. 53-138837 (Japanese Unexamined Patent Publication No. 55-64908) and Japanese Patent Application No. 54-59327 (Japanese Unexamined Patent Application No. 55-153605) as a rolling mill that can be extended more than twice as long as the conventional one. 4 shown in
Developed a corrugated rolling mill.

These rolling mills are designed so that the upper roll and lower roll intersect each other at a required angle with respect to a line perpendicular to the rolling direction. was able to achieve this.

Furthermore, as a mechanism for crossing the upper roll and the lower roll as described above, the specific mechanism shown in the specifications and drawings of Japanese Patent Application No. 54-59328, Japanese Patent Application No. 55-32612, and Japanese Patent Application No. 55-32613 is described. was developed.

In these mechanisms, the roll jocks of the upper roll and lower roll are rotated in the same horizontal plane using a vertical axis as the rotation axis by a jack attached to the housing or a pedestal provided in the housing, and the upper roll and lower roll are rotated in the rolling direction. It is made to cross each line perpendicular to the line.

Figure 1 shows the patent application developed by the applicant in 1982.
It is a roll cross mechanism of a four-high rolling mill of No. 32613, and in the figure, 8 is a housing, 20, 20' are pedestals, 13a, 13b, 13c, 13d, 13
a', 13b', 13c', 13d' are jacks, 6, 7
6 is a roll chock for the upper roll, and 6' and 7' are roll jocks for the lower roll, and the above-mentioned mechanisms are provided at both ends (working side, driving side) of the roll.

Therefore, by operating the respective jacks 13a, 13b...13d', the roll jocks 6, 7, 6',
7' in the front and rear sides of the rolling direction, and the upper rolls 2,
3. The lower rolls 2' and 3' can be crossed.

However, each of the above-mentioned jacks 13a, 13b,...
13d' is required to have the following functions in addition to the roll movement role of crossing the upper roll and the lower roll.

(b) Function to hold the upper roll and lower roll in a predetermined position (b) Function to support the horizontal force that is positive or negative generated in the direction of progress of the rolled plate against the upper roll and lower roll during rolling (c) The upper roll and lower roll must move vertically under the conditions (a) and (b) above when setting the rolling reduction amount and when operating. ) Since the rolls are moved under the conditions described in (a), (b), and (c) above, appropriate clearance is required between each jack and each roll chock, and when changing the rolls, a large clearance with the roll chock is required. It is also necessary to prevent time consuming and facilitate reorganization work.

Therefore, considering the functions that play the roles described above, the conventional device as shown in Figure 1 cannot be said to be sufficient, and a device that has the functions described above is required, but it is still difficult to find the appropriate one. No suitable device has been developed.

In view of the above-mentioned circumstances, the present invention provides a roll-cross driving device that can perform the above-mentioned functions in a roll-cross type rolling mill. In a rolling mill having rolls whose axes are configured to make an angle slightly inclined from a right angle in a horizontal plane including the rolling direction, a pair of crossheads for moving the roll jocks installed oppositely on both sides of the roll jocks are each equipped with an electric motor-operated movement mechanism. a mode selection device for outputting a selection mode setting signal for each movement mode in which the pair of crossheads move synchronously in the same direction, move synchronously in opposite directions, or move independently; A control device is provided which receives and calculates a detection feedback signal for the direction and amount of rotation of each of the electric motors together with a mode setting signal, and outputs a control signal for each of the moving mechanisms, and crosses the rolls by selecting the moving mode. The present invention is characterized by the provision of a control mechanism for holding the crosshead at an arbitrary position, separating the crosshead from the roll chock at the time of roll rearrangement, or moving each crosshead independently.

The present invention has the above-mentioned configuration, and normally the roll chock is moved by moving a pair of crossheads installed on both sides of the roll chock in synchronization in the same direction by selecting the movement mode of the control mechanism. The roll chock can be moved while maintaining a constant clearance between the crossheads to bring the roll into the correct cross position and hold it there. The upper roll and lower roll can be similarly moved to set a predetermined cross angle.

Furthermore, in the present invention, when changing the rolls, by selecting the control mechanism to a movement mode in which the crossheads are moved synchronously in opposite directions,
The relative operating state of both moving mechanisms is different from the above case, and both crossheads are separated from the roll chocks, resulting in a larger clearance, which facilitates roll rearranging work and prevents damage to the rolls, etc.

In addition, in the present invention, if the clearance between the crosshead or roll choke liner becomes larger than a predetermined amount due to wear, etc., and the clearance between the two becomes larger than a predetermined amount or disappears, the control mechanism can be moved independently of each crosshead. By selecting the moving mode, the moving mechanism of the part can be operated and the clearance can be adjusted appropriately. The rolling operation can be carried out smoothly. In the present invention, a mode selection device outputs a selection mode setting signal for each movement mode in which each crosshead of the pair moves synchronously in the same direction, moves synchronously in opposite directions, or moves independently. , the control mechanism outputs a control signal for each movement mechanism calculated by inputting the selection mode setting signal and a detection feedback signal of the rotation direction and amount of rotation of each electric motor, and the control signal is used to control each movement. Since the mechanism is controlled, the operation of each movement mode as described above is performed automatically and appropriately.

Examples of the present invention will be described below.

FIG. 2A is a sketch showing the outline of the first embodiment of the present invention, and in the figure, 6'a, 7'a, 6b, 7b
are roll chocks 6a, 7a, 6'b, provided on both ends (work side A, drive side B) of the upper work roll and backup roll (not shown).
7'b is a roll chock provided at both ends of the lower work roll and back-up roll, which is almost the same as that of the rolling mill shown in FIG. 1;
Each of the roll chock sets a, 6b, 7b, 6'a, 7'a, 6'b, 7'b has a pair of crosshead sets 38a, 2 disposed so as to sandwich them on both sides.
38a, 38b, 238b, 138a, 338
a, 138b, and 338b, and each crosshead has two worm jacks 13.
ab, 113ab, 213ab, and 313ab are provided.

Furthermore, electric motors 31, 131, 231, 331
are provided, and each electric motor has a coupling ring 32, 132, 232, 33 with a torque limit, respectively.
2. Worm gear reducer 33, 133, 233,
333, coupling (clutch) 34,13
4,234,334, bevel gear 35,135,
235, 335, mechanical tie shaft 36, 136, 23
Worm jack 13ab, via 6,336 etc.
113ab, 213ab, 313ab to drive each crosshead 38ab, 138ab, 238ab, 3
38ab, each motor having a moving mechanism configured to simultaneously move two crossheads moving in the same direction as shown.

Furthermore, each electric motor 31, 131, 231,
Rotation angle detector 37, 137, 2 on the extension shaft of 331
37 and 337 are provided respectively, and the rotation direction and amount of rotation of the motor are detected by their rotation angle detectors, and the amount of movement of each jack, that is, the crosshead, can be easily determined from the amount of rotation of the motor. It is possible to convert the cross angle between the upper roll and the lower roll from the amount of movement, and convert this into the fourth
Combined with the control mechanism shown in the figure, automatic remote control is possible.

In FIG. 4, A is a mode selection device that allows selection of multiple modes during normal operation, roll change, and clearance compensation, and B is a control device based on the mode setting signal of A. It is designed to calculate the rotation direction and rotation amount of each of the plurality of electric motors, control the electric motor C, and output a control signal to the clutch on/off device E, where D calculates the rotation direction and rotation amount. A control mechanism for the moving mechanism is provided, which is a detector and enables automatic feedback control for sending the detection signal to B. Note that each part of the control mechanism has already been developed and can be implemented by electrical control equipment, so a detailed explanation of specific examples thereof will be omitted.

The illustrated embodiment has the above-mentioned structure, and mode selection of the control mechanism is performed by a pair of crossheads disposed on opposite sides of the roll chock moving in synchrony in the same direction, moving in synchrony in opposite directions, or moving in synchrony in opposite directions. Alternatively, the direction and amount of rotation of the electric motor of each moving mechanism may be controlled for each moving mode in which the moving mechanism is moved independently.

Therefore, to explain the operation of the embodiment, during normal operation, the control mechanism is selected to a movement mode in which the pair of crossheads are moved in synchrony in the same direction, and the second
As shown in figure A, electric motors 31, 131, 231,
331 is synchronized by an electric tuning function (electronic device) and rotates in the direction shown in the figure, thereby connecting a pair of crossheads 38a and 23 installed on both sides of the roll chock.
8a, 138a and 338a, 38b and 238b,
In the combination of 138b and 338b, if one crosshead moves in a certain direction, the other crosshead also moves the same amount in the same direction, that is, on the working side A, the lower crosshead set 38a, 2
When 38a moves in the input direction C of the rolled material, the upper crosshead set 138a, 338a moves the same amount in the exit direction D, and on the drive side B, the lower crosshead set 138b, 338b moves in the exit direction. D, the upper crosshead set 38b, 238b is moved by the same amount in the entry direction C. If the installation is adjusted to maintain a constant clearance between the roll chock and the crosshead, the roll chock can be moved while maintaining a constant clearance, and the roll chock (that is, the roll) can be held at any position, and the upper roll and The lower roll can be set to a predetermined cross angle.

Next, when changing the rolls, the control mechanism is set to a movement mode in which the pair of crossheads move in synchrony in opposite directions, and both of the pair of crossheads placed across the roll chock move in unison as shown in Figure 2B. Since the rotation direction and amount of rotation of each electric motor are set in the direction away from the roll chock, the crossheads are separated from both sides of the roll chock, creating a large clearance between them on both the entry and exit sides, eliminating galling when changing rolls. Reclassification becomes easier.

Furthermore, as shown in FIG. 2C, if the clearance between the roll choke liner or the crosshead 38a becomes larger than a predetermined amount due to wear, for example, the control mechanism allows the crossheads to move independently. Select the travel mode to
For example, by disengaging the clutch 34b of the drive system of the electric motor 31 and engaging the clutch 34a, the clearance between the roll chock and the crosshead can be adjusted to an appropriate amount by moving only the electric motor 31 and moving only the crosshead 38a.

FIG. 3 shows another embodiment, which is different from FIG. 7b and 7'b, and for this reason only the crosshead and worm jack installed on both sides of each roll chock are separated, and their movement mechanism and control mechanism have the same structure as in Figure 2 ABC. Because of this, the effects will also be the same.

The embodiment is as described above, and each of the operations described above is possible, and the rolling operation can be carried out smoothly by automatic remote control.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Fig. 1 is a side view showing an outline of a conventional roll cross type rolling mill, Fig. 2A is a sketch of an embodiment of the present invention, Figs. 2B and 2C are action explanatory diagrams of Fig. 2A, and Fig. 3 is a sketch of another embodiment, and FIG. 4 is a schematic explanatory diagram of the control mechanism of the embodiment. 6a, 6'a, 6b, 6'b, 7a, 7'a, 7
b, 7'b...Roll check, 13ab, 113
ab, 213ab, 313ab...worm jack,
31,131,231,331...Electric motor, 3
1, 32, 33, 34, 35, 36... drive system,
37,137,237,337... Rotation angle detector, 38ab, 138ab, 238ab, 338ab...
...Crosshead, A...Mode selection device, B...
Control device, C...motor, D...detector, E...
Clutch engagement/disengagement device, A...working side, B...drive side.

Claims (1)

[Claims] 1. In a rolling mill having a roll configured so that the angle formed by the roll axis in a horizontal plane including the rolling direction is slightly tilted from a right angle by displacing the roll chock of the rolling mill, a pair of roll jocks installed oppositely on both sides of the roll chock Each of the crossheads for moving the roll jocks is provided with an electric motor-operated movement mechanism, and a movement mode is selected in which the pair of crossheads move synchronously in the same direction, move synchronously in opposite directions, or move independently. A mode selection device that outputs a mode setting signal, and a control device that receives and calculates a detection feedback signal of the rotation direction and amount of rotation of each of the electric motors together with the selection mode setting signal and outputs a control signal for each of the moving mechanisms. The rolling method is characterized in that it is provided with a control mechanism that crosses the rolls and holds them at an arbitrary position depending on the selection of the movement mode, separates the crosshead from the roll chock when changing the rolls, or moves each crosshead independently. Machine's roll cross drive.