KR20140084661A - Apparatus for leveling hot plate - Google Patents

Abstract

An apparatus for leveling a plate is provided. The apparatus for leveling a plate comprises multiple upper and lower leveling rolls which are provided in an apparatus frame to vertically move to control a roll gap, have different diameters increased from an inlet to an outlet, and level a plate passing between the rolls; and a detecting means provided in the apparatus frame to detect an arrangement condition of the plate leveling rolls or the internal environment of the apparatus. According to the present invention, the apparatus for leveling a plate individually controls rolls having different diameters from an inlet to an outlet of the apparatus, applies a large plastic deformation on an inlet side with a small roll gap, and distributes less plastic deformation more quickly toward the outlet, thereby efficiently leveling the plate. The apparatus for leveling a plate also controls rolls as a group to correspond to the thickness of the plate, such as a thin plate, a middle plate, and a thick plate, and detects the arrangement of the rolls at the same time, thereby optimally leveling the plate.

Description

Apparatus for leveling hot plate

More specifically, the present invention relates to a sheet material calibrating apparatus, and more particularly, to a sheet material calibrating apparatus which is capable of individually controlling the rolls to have different diameters from the inlet side to the outlet side of the apparatus, In addition to realizing effective correction, it is possible to realize the grouping control of the calibrating rolls corresponding to the thin, thick and thick materials depending on the thickness of the plate, and in particular to detect the alignment of the rolls, Plate) calibrating the sheet material.

First, FIG. 1 shows a production process of a known hot plate (hereinafter referred to as a 'heavy plate') ek.

For example, a known thickening process may include a heating furnace 110, a roughing mill 120, a roughing mill 130, a preliminary calibrator 140, an accelerating cooler 150, a hot calibrator 160, ) To manufacture the thick plate 180.

1, in the case of a conventional hot-wire straightener 160, a combination of a backup roll and a work roll (only the work roll in FIG. 1) is actually used to pass through the work rolls and the cooling step The flatness of the rough plate 180 is corrected to improve the quality of the product.

That is, in order to improve the flatness of the rolled plate in the rolling mills 120 and 130 during the production of the heavy plate, if the flatness of the rolled plate is not secured, the flatness of the plate is ensured in the subsequent hot- .

On the other hand, there are a number of factors affecting the calibrating effect of such a plate, but in terms of the equipment itself, it may be related to the calibrating roll.

For example, in general, when the diameter of a calibrating roll (hereinafter, referred to as "roll diameter") is small, it is suitable for calibrating a thin material having a thickness of 15 t or less. When the roll diameter is increased, .

This is because, if the roll diameter is small, the curvature that can be applied to the material increases, and when the thickness is small based on the equivalent surface strain rate, the curvature must be large to provide a large strain (elongation). On the other hand, Can be added.

Further, in the case of constituting with only a small-diameter roll, since the calibrating load increases when calibrating the post-material, the small-diameter roll is basically less than the large-diameter roll,

On the other hand, when calibrating with only a large-diameter roll, since the roll diameter is large with respect to the material, there is a limit to the addition of the surface elongation percentage of the thin material, so that it is difficult to obtain a sufficient calibrating effect.

Therefore, it is difficult to provide a correction effect equivalent to a calibrating object, that is, a mass material, a heavy material, or a post material of a thick plate when the roll caliber is constant in the conventional hot calibrator as shown in FIG.

On the other hand, a calibrating environment of the conventional hot-calibrator of FIG. 1 based on rolls of the same diameter (hereinafter referred to as "same-diameter rolls") is improved and a roll having different diameters ) Are known to perform the calibrating of the material (plate).

For example, U.S. Patent No. 5,855,132 proposes a technique of using a calibrating roll (work roll) in which the diameter of the calibrating roll in the calibrator increases from the inlet side to the outlet side of the calibrator.

However, in the above patent, only the two-roll rolls are shown, and an appropriate calibration method according to the thickness of the thick plate, the thick material, the heavy material, and the post material is selected, that is, And does not disclose a technique of grouping and performing appropriate calibration. Further, an auxiliary work roll is provided between the small diameter rolls and the work roll.

Particularly, in the above-mentioned U.S. Patent, the position of the rolls is detected so as to have a normal roll gap in the setting step of the rolls, when the plate-like calibrating rolls of these two rollers are selectively grouped and calibrated in various forms There has been no disclosure of an alignment control technique for sensing to perform accurate plate plate calibration by detecting the alignment of the plates.

Therefore, in order to solve the above problem, a calibration is performed based on a diameter roll which increases the roll diameter from the entrance side to the exit side of the apparatus. It is possible to provide a large plastic deformation even at a small roll gap at the mouth side and to distribute the plastic deformation as small as possible toward the exit side to realize an efficient correction and to realize an effective correction even in the rolls corresponding to the thicknesses of the plate material, There has been a demand for a sheet material calibrating apparatus and a method of manufacturing a thick plate using the same, while realizing the grouping control of the sheet material, in particular, by further sensing the alignment of the rolls and ultimately enabling the optimum correction.

In order to accomplish the above-described needs, the present invention provides a device frame having different diameters from the inlet side to the outlet side, the diameter of which increases from the inlet side to the outlet side, and is provided movably upwardly and downwardly to control the roll gap, A plurality of upper and lower calibrating rolls, And

Sensing means provided in the apparatus frame for sensing an alignment state of the sheet material correcting roll or an internal environment of the apparatus;

The sheet material correcting apparatus according to claim 1,

Preferably, the upper and lower calibrating rolls are connected between upper and lower moving bearing blocks in association with an actuator provided in the apparatus frame, so that the roll gap is controlled, and the change in roll diameter of the calibrating rolls is controlled by the diameter And the roll diameter of the first calibrating roll on the inlet side is 50 to 300 mm.

More preferably, the upper and lower calibrating rolls are individually controlled or group-controlled so that the roll gaps are individually controlled corresponding to the wood material, the heavy material or the post material of the plate material.

The sensing means may be provided at a lower portion of the first and second moving means provided in the apparatus frame so as to be movable in the length of the plate material and in the width direction so as to detect the alignment state of the calibrating roll or the internal environment of the apparatus.

Preferably, the first moving means includes a first moving body, which is coupled to a screw bar provided to be driven as a motor in the apparatus frame in the longitudinal direction of the apparatus, and is provided so as to be movable in the longitudinal direction of the apparatus.

More preferably, the second moving means is provided at a lower portion of the first moving body so as to be movable in a width direction of the apparatus in association with a lower portion of a feeding roller (94) moving along a rail provided in a device width direction, And the sensing means is mounted on the second moving body and is provided so as to be movable in the length and width direction of the apparatus.

The sensing means may include: a sensor vertically mounted on the second moving body of the second moving means toward the roll; And a sensor sensing body in which both roll axes of the calibrating rolls are assembled and connected between bearing blocks moving in roll gap control, so that the roll alignment is sensed.

Preferably, the sensing means further includes a camera provided to the second moving body of the second moving means so as to detect the internal environment of the apparatus.

According to the present invention, a large plastic deformation is added even in a small roll gap at the side by controlling the rolls to be different from each other in the diameter of the rolls from the side of the apparatus to the side of the apparatus, and the plastic deformation is distributed more quickly toward the outlet, The present invention realizes the grouping control of the rolls corresponding to the thin, thick and thin materials according to the thickness of the plate, and thus ultimately enables optimum sheet material correction.

That is, the present invention realizes the roll gap control by separately or grouping the appropriate diameter rolls in accordance with the thickness of various plate materials such as the wood material, the heavy material and the back material of the plate material. For example, The rolls with the smallest diameter are calibrated, and the rolls with large diameter on the outgoing side, which have large load and large plastic deformation even with small curvature, are separately or grouped to perform the optimum efficient calibrating operation You can do it.

In particular, the present invention makes it possible to detect the alignment of calibration rolls operated individually or grouping controlled in the setting step to realize precise roll gap control and maintenance, and to further monitor the operation state of the rolls and the like.

As a result, the present invention makes it possible to efficiently calibrate, in particular, through calibrating rolls of different diameters corresponding to the plate thickness, and to reduce the calibrating load and the roll wear, thereby prolonging the life of the equipment.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram illustrating lay-
2 and 3 are diagrams showing a sheet material calibrating apparatus including calibrating rollers of different diameters having different diameters according to the present invention
Figs. 4A and 4B are schematic views showing a conventional calibrating roll of the same diameter and a two-roll roll whose diameter increases from the inlet side to the outlet side according to the present invention
5 is a view showing a surface plastic deformation relationship according to the curvature and the thickness added on the upper surface of the calibrating roll when the thick plate is subjected to bending
FIG. 6A shows the distribution of the plastic deformation generated on the upper surface of the roll, FIG. 6A shows the distribution according to the difference of the maximum / minimum plastic deformation when using rolls of the same diameter, FIG. Drawings showing plastic deformation distribution during use
Fig. 7 is a graph showing the shape of a calibrated plate obtained through finite element evaluation when using the same radial roll and two rolls
FIGS. 8A and 8B are schematic views showing load distributions of a material material and a posterior material through a finite element evaluation when using the two-
Figs. 9A to 9E are diagrams showing an operation state diagram showing various calibrated states of a roll for a thin plate material, a heavy material, and a post material at the time of calibrating the plate through the two-
FIGS. 10 to 12 are a front view, a side view, and an operation state diagram showing a sheet material correcting apparatus further including the detecting means according to the present invention

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described (with reference to the accompanying drawings). However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. (The shape and size of elements in the drawings may be exaggerated for clarity.)

2 and 3 illustrate a plate 1 (hereinafter referred to as a 'thick plate') according to the present invention.

That is, as shown in FIGS. 2 and 3, the plate plate straightening apparatus 1 of the present invention basically has a different diameter D in which the diameter increases from the entrance side to the exit side in the apparatus frame 10, A plurality of upper and lower calibrating rolls 30 and 50 which are provided so as to be movable upward and downward so as to be controlled so as to be controlled so as to pass through the plate material 2 and to detect the alignment state of the plate material calibrating roll, And a sensing means 70 provided in the frame.

Therefore, the plate plate straightening apparatus 1 of the present invention is to perform the hot plate hot plate correction through the diameter rolls whose diameters increase from the inlet side to the outlet side basically.

The upper and lower calibrating rolls 30 and 50 may include an actuator 32 and 52 installed on the apparatus frame 10 and a bearing block 34 A roll shaft (not shown) is connected between the roll chocks 54 (roll chocks) so that the movement of the bearing blocks is adjusted according to the operation (forward or backward) of the actuator and the roll gap through the calibrated rolls is adjusted.

At this time, although schematically shown in the drawing, a guide (rail) for guiding the up and down movement of the bearing blocks is provided in the apparatus housing 10.

Of course, the upper and lower calibrating rolls 30 and 50 of the present invention are work rolls that contact and calibrate the thick plate 2, and as shown in Figs. 2 and 3, one interlocking bearing block 32, (52 ') may be provided with backup rolls (30') and (50 ') supporting the work rolls, which are the calibration rolls, respectively.

For example, the backup roll position of the hot plate plate straightening apparatus 1 is located directly below or directly above the work rolls so as to minimize the deformation of the work rolls. In this case, each of the work rolls 30, The rolls 30 ', 50' are assembled to the bearing blocks separated from each other so that the rolls can be individually controlled.

As shown schematically in the drawing, a load sensor such as a load cell may be provided at the upper end of a roll bearing block (roll choke) of the calibrating rolls 30 and 50, and a load sensor such as a load cell may be provided, So that the load applied to the roll can be measured.

In addition, there is a casing in which such components can be mounted or supported.

In particular, as shown in Fig. 3, it is also possible that the selected calibration rolls are grouped according to the ascending or descending of each bearing block, the driving of which is individually controlled, so that the calibration of the thick plate is properly implemented. In this case, contact wear between the rolls and the thick plate does not always occur, which will prolong the life of the roll.

Therefore, as shown in FIG. 4A, the plate plate calibrator (160 in FIG. 1) using a known common uniform diameter (D ') is designed so that all of the calibrating rolls 30 and 50 are implemented with the same diameter D However, as shown in FIG. 4B, in the case of the present invention, the roll diameter D gradually increases from the inlet side to the rear side, and the roll diameter D located on the outlet side is the largest.

8 and 9, the upper and lower calibrating rolls 30 and 50, in which the roll gap is individually controlled, are set so that the plate to be calibrated 2 corresponds to a thick material, a heavy material, and a post material The appropriate rolls can be selected and individually or grouped to perform the calibration.

5, plastic deformation is applied to the object to be calibrated, that is, the thick plate 2, by a method of three-point bending. Basically, in the bending mechanics, Since the maximum curvature that can be applied is determined, a range in which plastic deformation (elongation) can be applied depending on the thickness of the roll is also determined.

For example, the surface deformation rate of the thick plate 2 is determined by the curvature and the thickness of the thick plate. If the thickness of the thick plate is small, the surface deformation rate ε becomes large when the roll size D is small, On the contrary, if the roll diameter D is large, the plastic strain becomes small.

That is, in the case of a thin material having a thickness of 15 t or less, when the roll diameter is small, correction in the plastic deformation portion becomes good. Therefore, when the roll diameter is small, the plastic deformation is added, and when the roll diameter is large, the plastic deformation becomes small at the same roll gap.

Next, FIG. 6 shows the relationship between the plastic deformation and the same diameter roll and the diameter roll, but it is possible to add a lot of plastic deformation at the entrance roll diameter and reduce the plastic deformation more rapidly toward the exit side.

For example, FIG. 6A shows the distribution of the maximum and minimum plastic deformation according to the size to which the maximum plastic deformation is added in the same facility. In FIG. 6B, the same maximum plastic deformation is used as a reference, The distribution of plastic deformation is shown. Therefore, it can be seen that the plastic deformation distribution is larger than that of the same diameter roll when the maximum plastic deformation is used as the standard roll.

The change in the roll diameter of the calibrating rolls 30 and 50 from the inlet side to the outlet side of the apparatus in the inventive heavy plate calibrating apparatus 1 is preferably 1.0 to 2.0 times the diameter of the immediately preceding calibrating roll. If the ratio is smaller than 1.0, there is no difference in the roll diameter, and there is no difference from the conventional same calibrating rolls. On the contrary, when the diameter is larger than 2.0, excessive bending occurs at the three-point bending of the plate.

For example, if the initial diameter is smaller than 50 mm, considering the calibrating environment for the hot plate calibrating of the thick plate, the diameter D of the first calibrating roll of the heavy plate calibrating apparatus 1 is preferably 50 to 300 mm. If the diameter D is larger than 300 mm, the diameter of the subsequent succeeding calibrating rolls and the exit calibrating roll becomes too large, so that only the backup rolls 30 'and 50' Normal back-up is difficult, and the overall size of the device becomes excessively large.

Next, FIG. 7 shows the results of the above-described measurement of the effect of the diameter roll by the finite element method. In the case of the same diameter roll and the diameter roll, as shown in Table 1 below, As for the shape of the post-roll, it can be seen that the roll was improved about 50% more than the same roll in terms of morphology after calibrating. In terms of residual stress, the longitudinal stresses were 4.7%, 15.1% and 8.4% It can be seen that it is improved.

division Reference shape
(height, mm) After calibration
(Max height, mm) Stress after calibration
(S11, MPa) Stress after calibration
(Von mises, MPa) Same diameter roll (conventional) 100 36.4 130.8 145.5 Lee Kyung-Rool (present invention) 100 19 111.1 133.3 efficiency 4.7% 15.1% 8.4%

Next, in Figs. 8 to 9, the caliper rolls 30 and 50 of the present invention are used to calibrate the rolls in an appropriate pattern corresponding to the thickness of the thick plate 2, corresponding to the thin, thick, And shows various forms.

That is, as described above with reference to FIGS. 5 and 6, in the case of a thin material, since a plastic deformation can be largely reduced if the roll diameter is small, a calibrated roll with a small roll diameter is applied, Because of this size, it is preferable to use a calibrating roll having a large roll diameter, and it is advantageous in terms of not only increasing the calibrating efficiency but also extending the service life, by using calibrating rolls as far as possible.

For example, FIGS. 8A and 8B show the load distribution in the case of calibrating the tonnage material and the back material of the caliper roll. In the case of using the calender material, when all the calibrating rolls 30 and 50 are used, It is possible to know the load distribution on the center side calibrating roll by using the calibrating rolls 30 and 50 on the output side of the apparatus having a large roll diameter.

Next, FIGS. 9A-9E illustrate various arrangements of calibrating rolls in the case of a parquet, a heavy material, and a backing material. However, in Fig. 9, the material, the heavy material, and the after-mentioned material are shown separately as 2a to 2c. In FIG. 9, the roll performing the calibration is denoted by 'X', and the roll that is not calibrated is denoted by 'Y'.

That is, as shown in Figs. 9A and 9B, by using the entirety of the calibrating rolls 30, 50 in the case of the parquet material 2a, or by selectively using the calibrating rolls 30, Group and correct.

Alternatively, as shown in FIG. 9C, in the case of the heavy material 2b, calibrations can be performed using the central side calibrating rollers, except for the inlet and outlet calibrating rolls.

Alternatively, in the case of the post material 2c as shown in Figs. 9D and 9E, it is possible to use the exit calibrating rolls 30 and 50 of the apparatus as described above, or to calibrate the calibrating rolls have.

10 to 12 show another embodiment of the plate plate correcting apparatus 1 according to the present invention. In particular, in FIGS. 10 to 12, the detecting means 70 of the plate material correcting apparatus 1 of the present invention Respectively.

In other words, in the calibration apparatus 1 of the present invention, the sensing means 70 includes first and second moving means 80 (90) provided in the apparatus frame 10 so as to be movable in the length and width direction of the thick plate 2 And is provided to detect the alignment state of the calibrating rolls 30 and 50 or the internal environment of the apparatus, that is, the adhesion of the rolls to the rolls.

In particular, as described in FIG. 9, in the case of the heavy plate correcting apparatus 1 of the present invention, since the calibrating rolls are selectively grouped corresponding to the thin material, the heavy material, and the post material, The alignment state of the calibrating rolls 30 and 50 must be precisely set, and the sensing means 70 of the present invention detects and determines whether or not the alignment of the calibrating rolls is precisely set.

10 and 11, in the apparatus of the present invention, the first moving means 80 is provided with a motor 82 as a unit in the apparatus frame 10 in the longitudinal direction of the apparatus (in the traveling direction of the thick plate) And a first moving body 86 fastened to the screw bar 84 provided for driving and provided so as to be movable in the longitudinal direction of the apparatus.

That is, since the calibration rolls selectively perform calibration from the inlet side to the outlet side of the apparatus in the direction of the calibration of the thick plate, the first moving body 86 of the present invention allows the associated sensing means 70 to move in the longitudinal direction of the apparatus .

For example, in operation of the motor 82, the first moving body 86, i.e., the moving block, can move in the longitudinal direction of the apparatus.

Next, the second moving means 90 of the apparatus of the present invention is mounted on the lower portion of the feeding roller 94 which moves along the rail 92 provided in the lower portion of the first moving body 86, And a second moving body 96 provided so as to be movable in the width direction of the apparatus in association with each other.

When the motor is driven, the feeding roller is moved along the rails of the rails of the H-beam structure, for example, when the motors 98 are horizontally fixed to the second moving body. And, of course, the feeding roller (idle moving roller) is also moved on the opposite side in association with the second moving body.

Accordingly, the second moving body, that is, the second moving body 96, which is the box structure, can be moved in the width direction of the apparatus, and the sensing means 70 of the present invention is mounted on the second moving body 96, Through the operation control of the two motors 82 and 98, the first and second moving bodies 86 and 96 are moved in the longitudinal direction and the width direction of the apparatus, do.

Preferably, the sensing means 70 includes a sensor 72, for example, a distance sensor mounted vertically on the second moving body 96 of the second moving means 90, And a sensor bar 74, for example, a sensing rod, may be connected between the bearing blocks 34 and 54 where both roll axes of the calibration rolls are assembled and moved during roll gap control.

Accordingly, since the height of the bearing block results in the arrangement position of the calibrating rolls, the sensor 72 senses the sensor sensing body in order in the longitudinal direction of the apparatus, at which time the setting height of the calibrating roll is sensed, It can be judged whether it is precisely set.

In addition, in the apparatus of the present invention, the sensing means 70 may further include a camera 76 provided in the second moving body 96 provided in the second moving means.

As described above, according to the movement of the first and second moving bodies, the camera 76 moves in a straight up position on the rolls, thereby realizing the internal environment of the apparatus, that is, And to facilitate maintenance and maintenance of the device.

10 to 12 show that the sensing index stage 70 of the present invention is disposed on the side of the upper calibrating roll 30 but the mounting structure 70 of the first and second moving means 80 and 90 It is possible to install the sensing means of the present invention on the lower calibrating roll side.

1 .... sheet material correcting device 10 .... device frame
30, 50 ... calibration roll 70 .... sensing means
72 .... sensor 76 .... camera
80, 90 .... first and second moving means 86, 96 .... first and second moving bodies

Claims (8)

A plurality of upper and lower calibrating rolls 30 (50, 50, 50, 50, 50, 50) provided in the apparatus frame 10 so as to be movable up and down to control the roll gap, ); And
Sensing means (70) provided in the apparatus frame for sensing an alignment state of the sheet material correcting roll or an internal environment of the apparatus;
And a plate-like calibrator.
The method according to claim 1,
The upper and lower calibrating rolls 30 and 50 are connected between the upper and lower bearing blocks 34 and 54 in cooperation with the actuators 32 and 52 provided in the apparatus frame, And,
Wherein the change in the roll diameter of the calibrating rolls is 1.0 to 2.0 times the diameter of the immediately preceding calibrating roll and the roll diameter of the initial calibrating roll on the calibrating rolls is 50 to 300 mm.
The method according to claim 1,
Wherein the upper and lower calibrating rolls (30) (50) are individually controlled or group-controlled in correspondence with a material, a heavy material, or a post material of the sheet material.
The method according to claim 1,
The sensing means 70 is provided below the first and second moving means 80 and 90 provided to the apparatus frame 10 so as to be movable in the length and width direction of the plate material so that the alignment state of the calibrating rolls Wherein the apparatus is configured to detect the internal environment of the apparatus.
5. The method of claim 4,
The first moving means 80 comprises a first moving means 80 which is fastened to a screw bar 84 provided to drive the apparatus frame 10 as a motor 82 in the longitudinal direction of the apparatus, A moving body 86;
Wherein the sheet material is a sheet material.
6. The method of claim 5,
The second moving means 90 is connected to the lower portion of the feeding roller 94 moving along the rail 92 provided in the lower portion of the first moving body 86 in the apparatus width direction, A second moving body 96 provided movably;
Lt; / RTI >
Wherein the sensing means (70) is mounted on the second moving body and is provided so as to be movable in the length and width direction of the apparatus.
5. The method of claim 4,
The sensing means (70) comprises: a sensor (72) mounted on the second moving body (96) of the second moving means (90) toward the roll; And
A sensor sensing body 74 in which the roll axes of the calibration rolls are assembled and connected between the bearing blocks 34 and 54 which move in roll gap control;
And the roll alignment is detected.
8. The method of claim 7,
The sensing means (70) includes a camera (76) provided to the second moving body (96) provided in the second moving means so as to detect the internal environment of the apparatus;
Further comprising: a sheet conveying device for conveying the sheet material;

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