JP3445748B2 - Plate rolling mill - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate rolling machine provided with a split backup roll capable of individually detecting a load and adjusting a rolling reduction.

[0002]

2. Description of the Related Art In recent years, a load distribution is detected for each of three or more divided backup rolls, a load distribution between a rolled material and a work roll is estimated, and a plate shape is determined based on the estimated load distribution. Attention has been paid to a plate rolling mill to be controlled (for example, see Japanese Patent Laid-Open No. 6-262213 ). In this plate rolling machine, in principle, it is not necessary to detect and feed back the plate shape on the delivery side of the rolling machine, and therefore the plate shape can be directly controlled without a time delay. According to this plate rolling mill, good plate quality, that is, good plate crown and flatness can be obtained. Less than,
Such a plate rolling machine is called an intelligent plate rolling machine.

[0003]

In the intelligent plate rolling machine,
The diameter of the work roll is 200-
The diameter is 400 mm, which is smaller than other plate rolling machines. A twin drive that drives two work rolls is desirable in terms of roll wear and surface texture of the product. The twin drive has problems such as a drive device, a work roll rearrangement, and a spindle (drive shaft) own weight. The twin drive requires a drive device for two work rolls, which increases the equipment cost. It is necessary to change the work rolls frequently, and it takes time to attach and detach the spindle in the twin drive, which reduces productivity. Further, due to the weight of the spindle, an asymmetric component is generated in the load distribution of the split backup roll, which complicates the plate shape control. From the viewpoint of equipment cost, a single drive is preferable, but there is a problem in that the one-sided drive of the work roll has a small second moment of area of the drive-side roll and cannot sufficiently transmit the transmission torque required for rolling.

The present invention provides a plate rolling machine which reduces the facility cost, simplifies the roll rearrangement work, eliminates the influence of the work roll spindle weight on the load distribution of the split backup rolls, and has a high plate shape estimation accuracy. Is an issue.

[0005]

The plate rolling machine of the first invention is in contact with the upper and lower work rolls and the upper work roll,
A split backup roll divided into three or more parts in the roll axial direction and a non-split type lower backup roll in contact with the lower work roll are provided. The split backup roll and a rolling reduction device provided for each split backup roll, a load A plurality of split backup roll units including a detection device and a rolling position detection device are independently attached to the inner housing. The drive device is connected only to the lower backup roll. The upper and lower work rolls and the split type upper backup roll are not driven.

In this plate rolling machine, only two non-divided lower backup rolls are driven without driving two work rolls. Since the non-divided large-diameter lower backup roll is driven, sufficient torque required for rolling can be transmitted to the small-diameter work roll. Since only one roll driving device is required and one roll driving control system is provided, the facility cost is reduced. It is easy to change work rolls,
Work time is reduced. In addition, the spindle weight of the work roll does not affect the load distribution of the split backup rolls, and the asymmetric component of the load distribution of the split backup rolls can be removed when estimating the plate shape, which enables highly accurate plate shape estimation.

The plate rolling machine of the second invention is a non-splitting type roll which is in contact with the upper and lower work rolls, the upper work roll and is divided into three or more divisions in the axial direction of the roll, and the lower work roll. And two sets of lower backup rolls, and a separate backup roll unit composed of the divided backup roll and a reduction device provided for each divided backup roll, a load detection device, and a reduction position detection device is independently inner. It is attached to the housing. A drive device is connected only to each of the two lower backup rolls. The upper and lower work rolls and the split type upper backup roll are not driven.

In the plate rolling mill of the present invention, the two work rolls are not driven, but the two non-divided lower backup rolls are driven. Since the two lower backup rolls of the non-split type are driven, it is more compact than the plate rolling machine according to the first invention and can transmit a larger torque, and the work roll roll having a small diameter has a sufficient torque required for rolling. Can be transmitted. Since the drive device is not connected to the work roll, the reassembling is easy and the working time is shortened. In addition, the spindle weight of the work roll does not affect the load distribution of the split backup rolls, and the asymmetric component of the load distribution of the split backup rolls can be removed when estimating the plate shape, which enables highly accurate plate shape estimation. It is desirable to drive two non-divided lower backup rolls with one motor using a power distribution gear device or the like. As a result, only one drive device for the lower backup roll is required, and the roll drive control system becomes one, so the equipment cost is reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows an intelligent plate rolling machine according to the present invention. FIG. 2 schematically shows a main part of the intelligent plate rolling machine shown in FIG. FIG. 3 is a side view showing a roll configuration of the intelligent plate rolling machine shown in FIG. 1. In the intelligent plate rolling machine 10, upper and lower inner housings 12 and 13 are supported in a mill housing 11 so as to be vertically movable. The upper work roll 20 is supported by the upper inner housing 12 via a work roll chock 15 so as to be vertically and horizontally displaceable. The lower work roll 21 is supported by the lower innerle housing 13 via a work roll chock 15 so as to be vertically displaceable.

Each of the three sets of the input side split backup roll units 27 and the four sets of the output side split backup roll units 28 are independent from each other in the upper inner housing 12 in a row in the plate width direction (left and right direction in FIG. 2). And is installed. The input / output side split backup roll units 27 and 28 are divided backup rolls 3 respectively.
3, 34, a rolling down device 36, a load detecting device 37, and a rolling down position detecting device 38. Upper work roll 20
And the input / output side split backup roll rows 30 and 31 are
They are arranged in an inverted pyramid shape. Further, the input side split backup roll 33 and the output side split backup roll 34
And are alternately arranged in the plate width direction as shown in FIG. The rolling down device 36 independently applies a rolling down force to each of the split backup rolls 33 and 34 via the load detection device 37. As the rolling down device 36, for example, a hydraulic cylinder is used. The load detection device 37 detects the reduction load applied to each split backup roll 33, 34. As the load detection device 37, for example, a load cell is used. The rolling load may be obtained by detecting the pressure of the hydraulic cylinder. The reduction position detection device 38 detects the displacement of the split backup rolls 33 and 34 from the reference position (for example, the roll position when there is no load). For example, the cylinder position of the reduction device 36 is detected by a capacitive displacement sensor, an inductive displacement sensor, or the like.

The lower inner housing 13 has an integral type,
That is, the non-divided lower backup roll 40 is supported. The upper inner housing 12 is moved up and down by the pass line adjusting device 17, and the pass position of the rolled material S is adjusted. A pressing force is applied to the lower inner housing 13 by a pressing device 18.

The intelligent plate rolling machine 1 configured as described above
At 0, the upper and lower work rolls 20 and 21 and the split backup rolls 33 and 34 are not driven, and the lower backup roll 40 is rotationally driven by the drive device 45.

FIG. 4 shows another example of the roll configuration of the intelligent plate rolling mill. The upper and lower work rolls and the split backup roll are the same as those shown in FIGS.
The lower backup roll is composed of two non-divided lower backup rolls 42 and 43. The lower work roll 21 and the lower backup rolls 42 and 43 are arranged in a pyramid shape. Lower backup roll 42,
43 is rotationally driven by the drive device 46. The drive device 46 uses a single motor 47 to drive the power distribution gear device 4
The two lower backup rolls 42 and 43 are rotationally driven via the roller 8.

[0014]

Example 1 A test was conducted by driving the lower backup roll (roll diameter 650 mm) with the roll configuration shown in FIG. 3 by the intelligent plate rolling machine shown in FIG. Table 1 shows the specifications and rolling conditions of the rolling mill.

[Table 1]

Reworking of work rolls was reduced to 5 minutes. Since the roll drive control system became one, the control equipment cost was halved. In addition, the influence of the spindle's own weight has been eliminated, making it possible to accurately estimate the plate shape. On the other hand, when driving the upper and lower work rolls, it took 20 minutes to change the work rolls. In addition, the load distribution of the split backup roll has an asymmetrical component due to the weight of the spindle. Therefore, it was necessary to measure the load distribution of the split backup roll immediately after the reassembling work to remove the asymmetric component.

Example 2 A test was conducted by driving two lower backup rolls (roll diameter 300 mm) with the roll configuration shown in FIG. 4 by the intelligent plate rolling machine shown in FIG. The specifications and rolling conditions of the rolling mill are the same as those shown in Table 1 above.

Reworking of work rolls was reduced to 5 minutes. Since the two lower backup rolls are driven by a single motor, the roll drive control system became one, and the control equipment cost was halved. In addition, the influence of the spindle's own weight has been eliminated, making it possible to accurately estimate the plate shape. In the case of this embodiment, the cost is slightly higher than that of the rolling mill having the roll structure of the first embodiment. However, in the roll configuration of the first embodiment, the lower backup roll diameter may not be large due to the size limitation of the housing, and in such a case, torque transmission becomes insufficient. Since the roll structure of the second embodiment is compact, there is an advantage that such insufficient torque transmission can be eliminated.

[0018]

According to the plate rolling machine of the present invention, the reduction of the rolling torque of the work roll is prevented, the facility cost is reduced, the roll reassembling work is simplified, and the spindle weight of the work roll gives the load distribution of the split backup roll. The effect can be eliminated.

[Brief description of drawings]

FIG. 1 is a schematic side view of a plate rolling machine of the present invention.

FIG. 2 is a front view schematically showing a main part of the plate rolling machine shown in FIG.

FIG. 3 is a schematic diagram showing a roll configuration of the plate rolling machine shown in FIG.

FIG. 4 is a schematic diagram showing another example of a roll configuration of a plate rolling mill.

[Explanation of symbols]

10 Intelligent plate rolling machine 11 mil housing 12, 13 Inner housing 17, 18 Rolling down device 20 Top work roll 21, 23 Lower work roll 26 Work roll drive 27, 28 split backup roll unit 30, 31 Split backup roll row 33, 34 split backup roll 36 hydraulic cylinder 37 Load detection device 38 Roll position detector 40 lower (non-split) backup roll 42, 43 lower (non-split) backup roll 45,46 Backup roll drive 47 motor 48 power distribution gear device S rolled material

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yutaka Sadanano 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd. Technology Development Division (56) References JP-A-5-69010 (JP, A) JP-A-7-256309 (JP, A) JP-A-8-192205 (JP, A) JP-A-6-262213 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 13/14 B21B 29/00 B21B 31/02 B21B 35/00

Claims (2)

(57) [Claims] 1. An upper and lower work roll, a divided backup roll that is in contact with the upper work roll and is divided into three or more parts in the roll axial direction, and a non-divided lower backup roll that is in contact with the lower work roll, A five-fold plate rolling in which a plurality of divided backup roll units, each of which is composed of the divided backup rolls and a reduction device provided for each divided backup roll, a load detection device, and a reduction position detection device, are independently attached to an inner housing. In the rolling mill, a drive device is connected only to the lower backup roll, and the plate rolling mill is characterized. 2. An upper and lower work roll, a split backup roll which is in contact with the upper work roll and is divided into three or more parts in the roll axial direction, and two non-split type lower backup rolls which are in contact with the lower work roll. And a plurality of divided backup rolls each including the divided backup roll and a reduction device, a load detection device, and a reduction position detection device provided for each divided backup roll.
A sheet rolling mill in which a unit is independently attached to an inner housing, and a driving device is connected only to each of the two sets of the lower backup rolls.