JPH0218165B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll crown zero adjustment device for a multi-stage cluster rolling mill.

To explain a conventional multi-stage cluster rolling mill with reference to FIG. 1, 1 to 12 are upper and lower cluster roll groups,
13 is a rolled material, and among these cluster roll groups, 1, 2, 3, and 4 are divided back-up rolls in which the body is divided into a plurality of parts in the axial direction, and 5 and 6 are back-up rolls in which the body is not divided into parts. ,7,8,9,
10 is an intermediate roll, and 11 and 12 are work rolls. Further, FIG. 1 shows another example of a conventional multi-high cluster rolling mill, in which the upper part is constructed in the same manner as in FIG. 1, and the lower part is constructed in the same manner as in a normal four-high rolling mill. Next, the divided backup rolls 1 to 4 shown in FIG. 1 will be explained in detail with reference to FIGS. 2 to 4. 14 in FIG. The torso 18 is the same as each torso 14
15 is a plurality of eccentric sleeves interposed between the coaxial portion 18 and each body portion 14; 19 is a frame attached to a housing (not shown); 17 is a plurality of load supporting members interposed between the frame 19 and each eccentric sleeve 15, 20 is a bearing,
The load applied to each trunk section 14 is transmitted to the housing via the eccentric sleeve 15, load supporting member 17, and frame 19, and is supported by the housing. Further, 16 in FIGS. 2 and 3 is a worm that meshes with a gear provided on the outer periphery of the flange portion of each eccentric sleeve 15, 21 is a shaft of the worm 16, and 22
is a bevel gear, 23 is a reducer, 24 is a drive motor,
The drive motor 24 is started and its rotation is controlled by the reducer 2.
The information is transmitted to the eccentric sleeve 15 through the three bevel gears 22 shafts 21 and worms 16, and the angle of the eccentric sleeve 15 is changed to change the amount of extrusion of each body 14 (see Fig. 4). It is now possible to set the roll crown (roll profile) of the

In this type of multi-stage cluster rolling mill, when the body 14, eccentric sleeve 15, bearing 20, etc. wear out, the roll profile changes, so it is necessary to perform a zero adjustment operation to return this to the originally set roll profile. However, in the multi-stage cluster rolling mill shown in FIGS. 1 to 4, the body parts 14 arranged in the axial direction
Which part of the eccentric sleeve 15 bearing 20, etc. is worn to what extent, and which motor 24 should be driven and how much?
The amount of wear cannot be determined unless the divided backup rolls 1 to 4 are disassembled and the amount of wear measured, which is time-consuming and impedes productivity as it cannot be done online. Furthermore, since it is impossible to return to the original setting profile unless the divided backup rolls 1 to 4 are disassembled and the amount of wear measured, there is a problem in that the shape controllability is extremely poor.

The present invention addresses the above-mentioned problems, and includes a divided back-up roll whose body is divided into a plurality of parts in the axial direction to enable adjustment of the roll crown, and a body part of the divided back-up roll and the split back-up roll. In a multi-stage cluster rolling mill that has a plurality of eccentric sleeves interposed between a penetrating shaft and adjusts the roll crown of the divided back-up roll by changing the angle of each eccentric sleeve, The rotation angle of each eccentric sleeve is calculated from the difference between a plate shape detector provided on the side for detecting the flatness of the plate after rolling, a reference plate flatness stored in advance, and the output of the plate shape detector. A roll crown zero adjustment device characterized by comprising a zero adjustment calculation device and a servo mechanism that changes the angle of each of the eccentric sleeves according to the output of the zero adjustment calculation device, the purpose of which is to adjust the zero adjustment device. Not only can you eliminate the time and effort required for operations, but you can also go online. Another object of the present invention is to provide an improved roll crown zero adjustment device that can improve shape controllability.

As described above, the present invention provides a divided back-up roll whose trunk is divided into a plurality of parts in the axial direction to enable adjustment of the roll crown, and a divided back-up roll that has a trunk section that is divided into a plurality of parts in the axial direction to enable adjustment of the roll crown. In a multi-stage cluster rolling mill that has a plurality of eccentric sleeves interposed between them and adjusts the roll crown of the divided back-up roll by changing the angle of each eccentric sleeve, a rolling mill installed on the exit side of the rolling mill is used. a plate shape detector that detects the plate flatness of the plate, and a zero adjustment calculation device that calculates the rotation angle of each of the eccentric sleeves from the difference between a reference plate flatness stored in advance and the output of the plate shape detector; Since it is constructed with a servo mechanism that changes the angle of each eccentric sleeve based on the output of the zero adjustment calculation device, zero adjustment can be achieved without having to disassemble the divided back-up roll and measure the amount of wear on the body eccentric sleeves, bearings, etc. Adjustments can be made, the effort required for zero adjustments can be omitted, and it can be done online.
Further, since the zero adjustment operation can be automated using the plate shape detector, the zero adjustment calculation device, and the servo mechanism, the shape controllability can be significantly improved.

Next, the roll crown zero adjustment device of the multi-stage cluster rolling mill of the present invention will be explained with reference to an embodiment shown in FIG. 26 is a plate shape detector installed on the exit side of the rolling mill to detect the flatness of the plate after rolling; 27 is a zero adjustment calculation device;
Start the motor 24 when the body 14, eccentric sleeve 15, bearing 20, etc. are not worn,
The angle of the eccentric sleeve 15 is changed to set the standard roll profile, and then the rolled material 1 with the standard dimensions is
3 under standard rolling conditions (roll dimensions, rolling reduction, speed, tension, etc.), and a memory function for storing the detected value obtained by the plate shape detector 26 as a reference plate flatness value; After storing the reference plate flatness value, the motor 24 detects the difference between the plate flatness value of the rolled material 13 detected by the plate shape detector 26 during rolling and the already stored reference plate flatness value.
It is equipped with a calculation function that calculates the rotation angle of. Further, 28 is a motor rotation angle control device that controls the rotation angle of the motor 24 based on the output of the rotation angle detector 25 and the output of the zero adjustment calculation device 27, 30 is a clutch provided on the shaft 21 of the worm 16, and 29 is a This clutch control device controls the engagement and disconnection of the clutch 30 based on the output of the zero adjustment calculation device 27, and the zero adjustment calculation device 27 is operated by manual input from an operator.

Next, the operation of the roll crown zero adjustment device of the multi-stage cluster rolling mill will be explained. When there is no wear on the body 14, eccentric sleeve 15, bearing 20, etc., and the dimensions of each part of the divided backup rolls 1 to 4 are known, start each motor 24, change the angle of each eccentric sleeve 15, The roll profile is set (see Fig. 4), and then the reference rolled material 13 is rolled under the reference rolling conditions, and the detected value obtained by the plate shape detector 26 at this time is used as the reference plate flatness value and the zero adjustment calculation device is used. 27 to be memorized. Rolling starts from this state, but due to long-term rolling, the body 14, eccentric sleeve 15, bearing 20, etc. are worn out.
When the roll profile changes, the operator's manual input 31 activates the zero adjustment calculation device 27. At this time, the zero adjustment calculation device 27 calculates the rotation angle of the motor 24 from the difference between the plate flatness value of the rolled material 13 detected by the plate shape detector 26 and the already stored reference value, and outputs the calculation result. It is output to the motor rotation angle control device 28. Further, the zero adjustment calculation device 27 determines which clutch 30 is to be connected using a clutch connection/disconnection determining function included therein, and outputs a control signal obtained as a result to the clutch control device 29. The clutch control device 29 connects a predetermined clutch 30, and the motor rotation angle control device 2
8 starts the motor 24, and thereafter rotates the motor 24 by a predetermined rotation angle based on the output of the rotation angle detector 25 and the output of the zero adjustment calculation device 27. As a result, the role profiles of divided backup rolls 1 to 4 are returned to the initially set role profiles.

In this way, the divided back-up rolls 1 to 4 are disassembled, and the body 14 eccentric sleeve 15 bearing 2 is assembled.
Since the zero adjustment operation is possible without measuring the amount of wear such as 0, the time and effort required for the zero adjustment operation can be omitted, and it can be done online. In addition, the plate shape detector 26, the zero adjustment calculation device 27, and the servo mechanism 1
6 to 25 and 28 to automate the zero adjustment operation, shape controllability can be significantly improved.

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. . For example, in the embodiment described above, the rotation of the motor 24 is transmitted to the eccentric sleeve 15 via the reducer 23, the bevel gear 22, the shaft 21, and the worm 16, but the movement of the hydraulic cylinder may also be transmitted to the eccentric sleeve 15 via the rack and pinion. good. Also Backup Prowl 1~
4 is divided into five parts, and three of them are provided with eccentric sleeves 15, but the number of divisions of the back-up roll and the number of eccentric sleeves are not limited to this example.

[Brief explanation of drawings]

Figure 1 is a side view showing a conventional multi-stage cluster rolling mill, Figure 2 is a longitudinal sectional front view showing a divided back-up roll of the same multi-stage cluster rolling mill, and Figure 3 is a shape control installed on the divided back-up roll. FIG. 4 is an explanatory diagram showing a roll crown, and FIG. 5 is a system diagram showing an embodiment of a roll crown zero adjustment device for a multi-stage cluster rolling mill according to the present invention. 1 to 4...Divided backup roll, 14...
Body part, 15...Eccentric sleeve, 16-25, 28
...Servo mechanism, 26...Plate shape detector, 27...
...Zero adjustment calculation device.

Claims (1)

[Claims] 1 A split back-up roll whose trunk is divided into a plurality of parts in the axial direction to enable adjustment of the roll crown, and a plurality of split back-up rolls interposed between each trunk of the split back-up roll and the shaft passing through it. In a multi-stage cluster rolling mill that has eccentric sleeves and adjusts the roll crown of the divided back-up roll by changing the angle of each eccentric sleeve, a device installed on the exit side of the rolling mill detects the flatness of the plate after rolling. a plate shape detector, a zero adjustment calculation device that calculates the rotation angle of each eccentric sleeve from the difference between a reference plate flatness stored in advance and the output of the plate shape detector; A roll crown zero adjustment device for a multi-stage cluster rolling mill, comprising a servo mechanism that changes the angle of each of the eccentric sleeves according to an output.