JPH0218164B2 - - 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, A plate crown detector provided on the side to detect the plate crown after rolling, a reference plate crown memory device that stores the reference plate crown when rolled under standard rolling conditions, and the output of the reference plate crown memory device and the above. A zero adjustment calculation device that calculates the rotation angle of each of the eccentric sleeves from the difference between the output of the plate crown detector and a servo mechanism that changes the angle of each of the eccentric sleeves based on the output of the zero adjustment calculation device. The purpose of the featured roll crown zero adjustment device is that it can omit the effort required for zero adjustment operations and can also be done 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 crown detector for detecting the plate crown; a reference plate crown memory device for storing the reference plate crown when rolled under standard rolling conditions; an output of the reference plate crown memory device and an output of the plate crown detector. The structure consists of a zero adjustment calculation device that calculates the rotation angle of each eccentric sleeve from the difference between the two, and a servo mechanism that changes the angle of each eccentric sleeve based on the output of the zero adjustment calculation device. do,
Zero adjustment can be performed without measuring the amount of wear on the body, eccentric sleeve, bearings, etc. This eliminates the time and effort required for zero adjustment, and it can be done online. Furthermore, since the zero adjustment operation is automated using a plate crown detector, a reference plate crown memory device, a zero adjustment calculation device, and a servo mechanism, 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.
24 is the same part as above, 25 is a rotation angle detector of the motor 24, 26 is a plate crown detector provided on the exit side of the rolling mill to detect the plate crown after rolling;
7 is a reference plate crown memory device, and the reference plate crown memory device 27 includes divided backup rolls 1,
When the body 14, eccentric sleeve 15, bearing 20, etc. of No. 2 are not worn, start the motor 24, change the angle of the eccentric sleeve 15, set the standard roll profile, and then roll the rolled material 13 with standard dimensions. Standard rolling conditions (roll dimensions, rolling reduction,
rolling speed, tension, etc.), and the detected value obtained by the plate crown detector 26 at that time is stored as a reference plate crown value. Further, reference numeral 28 denotes a zero adjustment calculation device, and the zero adjustment calculation device 28 is used to detect the plate crown detector 26 during rolling after the reference plate crown storage device 27 stores the reference plate crown value.
The rotation angle of the motor 24 is calculated from the difference between the plate crown value of the rolled material 13 detected by the operator and the reference plate crown value stored in the reference plate crown storage device 27, and this calculation is based on the operator's manual input 30.
This is done by In addition, 29 is the same zero adjustment calculation device 2.
This is a motor angle control device that controls the rotation angle of the motor 24 based on the output 31 of the motor 8 and the output of the motor rotation angle detector 25, and there are as many control devices 29 as there are motors 24 (eccentric sleeves 15). Note that numerals 32 and 33 in the figure are outputs from the zero adjustment calculation device 28 to other motor rotation angle control devices.

Next, the operation of the 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, 2 (or 3, 4) are known, start each motor 24, and install each eccentric sleeve. 15 to set a reference roll profile (see Fig. 4), then the reference rolled material 13 is rolled under the reference rolling conditions, and the detected value obtained by the plate crown detector 26 at that time is used as the reference. It is stored in the reference plate crown storage device 27 as a plate crown value. Rolling starts from this state, but when the body 14, eccentric sleeve 15, bearing 20, etc. wear out due to long-time rolling, and the roll profile changes, the zero adjustment calculation device 28 is activated by the operator's manual input 30. let At this time, the zero adjustment calculation device 28 calculates the rotation angle of the motor 24 from the difference between the plate crown value of the rolled material 13 detected by the plate crown detector 26 and the reference plate crown value stored in the reference plate crown storage device 27. The control signals obtained as a result (see 31 to 33) are output to each motor rotation angle control device 29. At this time, the motor rotation angle control device 29 starts the motor 24,
Thereafter, the motor 24 is rotated by a predetermined rotation angle based on the output of the rotation angle detector 25 and the output of the zero adjustment calculation device 28. As a result, the role profiles of the divided backup rolls 1 and 2 are returned to the initially set role profiles.

In this way, zero adjustment is possible without disassembling the divided back-up rolls 1, 2 (or 3, 4) and measuring the amount of wear on the body 14, eccentric sleeve 15, bearing 20, etc. This not only saves you the time and effort that was previously required, but also allows you to do it online. Furthermore, since the zero adjustment operation is automated using the plate crown detector 26, the reference plate crown memory device 27, the zero adjustment calculation device 28, and the servo mechanisms 16 to 25, 29, 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, 29
... Servo mechanism, 26 ... Plate crown detector, 2
7...Reference plate crown storage device, 28...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, the crown of the plate after rolling provided on the exit side of the rolling mill is detected. A plate crown detector, a reference plate crown memory device that stores the reference plate crown when rolled under standard rolling conditions, and the difference between the output of the reference plate crown memory device and the output of the plate crown detector described above. A roll crown zero adjustment for a multi-stage cluster rolling mill, comprising a zero adjustment calculation device that calculates the rotation angle of an eccentric sleeve, and a servo mechanism that changes the angle of each eccentric sleeve based on the output of the zero adjustment calculation device. Device.