JPS6117311A - Multistep cluster rolling mill - Google Patents

Abstract

PURPOSE:To provide the titled multistep cluster rolling mill having the plate thickness controlling means which obtains the plate shape for the automatically and being made with providing a load cell for the detection of the load applied on each divided body part, roll crown controlling device and servo mechanism. CONSTITUTION:The roll profile of the divided backup roll (A) is set up so as to obtain the target plate shape after the start of rolling. At this moment the load acting on the roll A is detected by a load cell 26 which is provied at each load supporting member 19 and a transmitted to a motor angle arithmetic unit 27 as an electrical signal. The load acting on each roll A varies due to the disturbance of the rolling material having a thickness variation in the plate width direction entering the inside of the rolling mill, but the variation thereof is outputted as the present load value from the cell 26. The load value thereof is compared 27 with the load set value stored in advance and the result thereof is outputted to a motor revolution angle controlling device 29. The device 29 then starts a driving motor 24 and afterwards rotates the motor 24 by the prescribed angle by the output of the rotary angle detector 28 and the output of the unit 27, and the most suitable roll profile which can obtain the target plate shape even against the plate shaping disturbance.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a multi-stage cluster rolling mill having plate shape control means.

A conventional multi-stage cluster rolling mill is shown in FIGS. 1 to 4. FIG. 1 (1) (II) shows the upper and lower cluster roll groups, and in the same figure, u12.3.4 is a divided backup roll whose body is divided into a plurality of parts in the axial direction, and 5.
6 is not divided/(vine up roll, 7.8*9
．． 10 is an intermediate roll, 11.12 is a work roll, 13
It is a po-rolled material. Here, backup o-A/5
+6 may be divided, or Figure 81 (II
The lower part of the example shown in ) has a structure similar to that of a normal four-high rolling mill. .

FIG. 2 shows longitudinal sections of divided backup rolls 1 to 4 among the cluster roll group shown in FIG. 1. This second
In the figure, the divided backup rolls l to 4 are divided into a plurality of parts in the axial direction, and include a round body part 14, a bearing 15 that rotationally supports this body part 14, and a shaft part 16 that passes through the bearing 15. The eccentric sleeve 17 changes the amount of extrusion of the body part 14 as it rotates.The eccentric sleeve 17 is interposed between the eccentric sleeve 17 and the seven frames 18 attached to the housing (not shown), and engages with the load supporting member 19 and the eccentric sleeve 17. It has a worm 20. Therefore, the load applied to each trunk 14 is transmitted to the housing via the eccentric sleeve 17, the load support member 19, and the frame 18, and is received by the housing.

FIG. 3 mainly shows the rotational drive section of the eccentric sleeve 17. In the same figure, a worm "20" that meshes with a gear provided on the outer periphery of the seventh flange of the eccentric sleeve 17 is shown.
0 at one end and a bevel gear 22 provided at the other end of the shaft 21;
A reduction gear 23 connected to this bevel gear 22, this reduction gear 2
3 is primarily shown. When the drive motor 24 is started, its rotation is transmitted to the eccentric sleeve 17 via the reducer 23, bevel gear 22, shaft 21, and worm 20.

As a result, the angle of the eccentric sleeve 17 is changed and the body 14
The extrusion amount is changed to set the roll crown (roll profile) of the divided backup rolls 1 to 4 as shown in FIG.

When controlling the shape of a plate using a multi-stage cluster rolling mill having the structure shown in FIGS. 1 to 4, the shape of the plate is detected by a shape detector on the exit side of the rolling mill. Then, by this detection, the roll crack (roll profile) of the divided backup roll is operated according to the deviation from the target plate shape, and the roll profile of the work roll or intermediate roll is operated according to the roll penetrating action.

However, when performing such an operation, it is necessary for the operator to visually check the shape detector at the exit side of the rolling mill at all times. First, it is an object of the present invention to provide a multi-stage cluster rolling mill having a plate thickness control means that automatically obtains a target plate shape.

The invention to achieve this object is to support each of the divided body parts in a multi-stage rusk rolling mill having divided bank-up rolls in which the body part is divided into a plurality of parts in the axial direction and the roll crown can be adjusted. A load cell is provided in each load support member to detect the load applied to each body, and the output of this load cell determines the rotation angle of each eccentric sleeve disposed between each body and each load support member. It is characterized by having a roll crown control device that performs calculations, and a servo mechanism that changes the angle of each of the eccentric sleeves based on the output of the roll crown control device.

The invention will now be described in detail with reference to FIGS. 5 and 6. Note that in FIGS. 5 and 6, the same parts as in FIGS. 1 to 4 are given the same reference numerals. In FIGS. 5 and 6, 14 is a body, 15 is a bearing, and 16 is a body.
are details, 17 is an eccentric sleeve, 18 is a frame, 19 is a load support member, 20 is a worm', 21 is a shaft, 22 is a bevel gear, 23 is a speed reducer, and 24 is a drive motor. are the same as those explained in FIGS. 1 to 4.

, On the downstream side, a load cell 26 is arranged between the load support member 19 and the frame 18 of the housing (not shown) with a spacer 25 interposed therebetween.
A roll crown control device (motor rotation angle calculation) that is electrically connected to the load set value and calculates the rotation angle of the drive motor 24 and the rotation angle of the eccentric sleeve 170 so as to store the load setting value and compare it with the current load value to adjust the deviation. On the other hand, the drive motor 24 has a motor rotation angle detector 28.
A motor rotation angle control device 29 is electrically connected to the rotation angle detector 28 and the roll crown control device 27. The motor rotation angle control device 29 provides control to the drive motor 24. connected for.

Then, the effect of the roll crown control means is removed. After rolling starts, the roll profile of the split bank up roll is set so that the target plate shape is obtained. At this time, the load acting on the divided bank up roll is detected by the load cell 26 provided for each load support member 19, and is sent as an electrical signal to the motor rotation angle calculation device 27 provided for each port 26. . The motor rotation angle calculation device 27 stores this signal as a load setting value for each divided backup roll at the time of the optimum roll profile, and uses it as a reference value for plate shape control in subsequent rolling.

Next, a rolled material having so-called plate shape disturbance, which has thickness variation in the width direction of the plate, enters the inlet side of the rolling mill. Due to the disturbance in the rolled material, the load acting on each divided back unroll varies, and this variation is output from the load cell 26 as a current load value. Then, this load value and the aforementioned stored load setting value are compared in the motor rotation angle calculation device 27, and then the rotation angle of the drive motor 24 is calculated from this comparison deviation, and the result is sent to the motor rotation angle control device. 29
is output to. The motor rotation angle control device 29 starts the drive motor 24 and then controls the drive motor 2 based on the output of the rotation angle detector 28 and the output of the motor rotation angle calculation device 27.
4 by a predetermined rotation angle. As a result, the roll profile of the split backup roll becomes an optimal roll profile that allows the target plate shape to be obtained even in the face of plate shape disturbances.

In the above-mentioned embodiment, the rotation of the drive motor 24 is transmitted to the eccentric sleeve 17 via the reducer 23, the bevel gear 22, the warp gear, and the A20, but the invention is not limited to this, and for example, the rotation of the drive motor 24 is transmitted to the eccentric sleeve 17 via the hydraulic cylinder 7. It is also possible to use a servo mechanism that transmits the movement to the eccentric sleeve 17 via a rank and a pinion.

Further, in the case where the eccentric sleeve 17 is provided in all or part of the divided backup roll, the number of eccentric sleeves and the number of divisions of the backup roll are not particularly limited.

As explained above, according to the present invention, in addition to being equipped with a load cell, a roll crown control device, and a servo mechanism,
Since the load on the load cell can be detected and automatic adjustment can be made so that the plate shape does not change, the target plate shape can be obtained without using a conventional shape detector. In comparison, it has excellent "immediate response."

[Brief explanation of the drawing]

Fig. 1 (1) (n) is a side view showing two configuration examples of a conventional multi-stage cluster rolling mill, Fig. 2 is a longitudinal cross-sectional view of an example of a split backup roll, and Fig. 3 is a rotation drive section of an eccentric sleeve. FIG. 4 is a configuration diagram mainly showing the roll crown of the split backup roll, FIGS. 5 and 6 show an embodiment of the present invention, and FIG. 85 is a longitudinal section of an example of the split backup roll. FIG. 6 is a configuration diagram. In the figure, 26 is a load cell, 27 is a motor rotation angle calculation device, 28 is a rotation angle detector, and 29 is a motor rotation angle control device. Patent Applicant: Mitsubishi Heavy Industries, Ltd. Kawasaki Steel Corporation Sub-Agent Patent Attorney: Ku Ishishibu (1 other person) Figure 1 (I) (II) Figure 2 15 141rl# Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] In a multi-stage cluster rolling mill having split backup rolls in which the trunk is divided into a plurality of parts in the axial direction and roll crowns can be adjusted, each of the above-mentioned components is provided on each load supporting member that supports each of the divided trunks. A load cell that detects the load applied to the body, a roll crown control device that uses the output of the load cell to calculate the rotation and angle of each eccentric sleeve disposed between each body and each load support member, and this roll. A multi-stage cluster rolling mill comprising: a servo mechanism that changes the angle of each of the eccentric sleeves according to the output of a crown control device.