JP2506249B2 - Straightening device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening device for removing warpage, deformation caused by ear waves, distortion, etc. generated in a rolled steel sheet.

[0002]

2. Description of the Related Art In the manufacture of steel sheet, its thickness is 4.5.
If it is more than a millimeter, it takes a considerable amount of time to correct a defective shape such as a warp or an ear wave. Therefore, conventionally, the correction work of the thick steel plate is often processed off-line.

The basis of the straightening work is to know the magnitude of distortion and deformation of the steel sheet in advance and adjust the rolling position and the rolling force by the straightening ram according to this. In such work, conventionally, an operator was placed on the steel plate before being sent to the ram, and the distortion height of the steel plate was measured using a metal gauge and a taper gauge. Then, according to the measurement result, the strain-deformation portion is fed so as to come to the working area of the ram, and then between the upper surface of the steel plate and the ram depending on the state of deformation, between the overlay bar and the lower surface of the steel plate and the surface plate. Place the underlay bar and straighten it by pressing down with a ram.After this straightening, the operator measures the shape of the straightened part, sends the steel plate if it is within the tolerance, and carries it out again if it is larger than the tolerance. .

[0004]

As described above, in the work of correcting a thick steel plate, an operator in a mid-waist posture manually examines the distortion of the steel plate and the deformation of waves, so that the burden on the operator is considerable. Since it is large and works on a steel plate near the ram, it is dangerous. In addition, since the degree of deformation such as distortion is differently recognized depending on the skill of the operator, it hinders the supply of products of uniform quality and is a bottleneck in improving productivity.

On the other hand, measuring the surface shape of a steel sheet and controlling the rolling mill is widely used in the steel sheet production line as disclosed in Japanese Patent Laid-Open No. 61-4913. As such a measuring method, for example, there are methods using various optical detection systems. However, such a detection system is generally used in a strip thin steel plate production line that generally requires high accuracy, and has not yet been applied to the field of straightening thick steel plates.

[0006] The main reason for this is that, in addition to the large restrictions on equipment, it is necessary to set the floor bar in the correction of thick steel plate depending on the state of deformation during the rolling down by the ram. It is important to place this floor bar in an appropriate position with respect to the deformation point of the steel plate, and the confirmation and measurement of the deformation point is done visually by the operator, and the setting of the floor bar also depends on the operator's manual work. . For this reason, it is not uncommon for the floor bar to be set in an incorrect position without being able to capture the proper deformation position, and this results in a correction error.

As described above, particularly in the press-ram type straightening device for thick steel plates, it is impossible to automatically process from the measurement of the shape of the steel plate to the proper straightening. Further, since the surface shape of the steel sheet after the straightening treatment only depends on the measurement by the operator, there is an obstacle in the supply of products requiring high quality.

The problem to be solved in the present invention is to automate the shape measurement of a steel plate in a press ram type straightening device,
The smooth installation of the laying bar during the straightening process is intended to improve the safety of work, obtain a high-quality steel plate, and improve the productivity.

[0009]

DISCLOSURE OF THE INVENTION The present invention is directed to a pair of lines that convey a steel sheet and can swing, and a rotatable pressurizing ram that straightens by pressing a portion to be corrected of the steel sheet between the lines. And a straightening machine equipped with a surface plate provided with a plurality of rows of drive rollers that can freely project and retract from the surface, and primary shape measuring means for continuously measuring the surface shape of a steel sheet being conveyed are provided in front of the straightening machine. The pressure ram is provided with secondary shape measuring means for measuring the surface shape of a specific surface of the steel plate under pressure by the pressure ram in the lower concave portion of the pressure ram and installed on the upper surface of the steel plate. An upper laid bar is movably connected inward and outward of a steel plate pass line, and a lower laid bar installed on the lower surface of the steel plate on the surface plate is movably connected inward and outward of the steel plate pass line, and further Based on the shape measurement result by the shape measuring means And controlling the movement of the upper insole rod and the lower insole rod.

Further, the shape measuring means receives two light beams from the two surfaces on the surface of the steel plate and two light beams reflected on the surface of the steel plate through a semitransparent mirror. The light receiving means, the displacement detecting means for calculating the displacement of the surface of the steel sheet by receiving the output from the light receiving means, and the means for calculating the surface shape of the steel sheet from the displacement of the steel sheet detected by the displacement detecting means. Can be prepared.

[0011]

The shape measuring means for receiving the two reflected light beams, which are the two light beams emitted by the two light projecting means and reflected by the steel plate, by the one light receiving means through the semitransparent mirror, is carried into the straightening machine. The entire surface shape of the steel plate is measured, and based on the calculation result of this measurement, the pressure ram is moved to the required position, then the pressure ram is lowered to the measurement position, and the shape of the steel plate at the position to be rolled down is scrutinized. By selecting the position and direction of the upper floor bar connected to the pressure ram and the lower floor bar provided on the surface plate according to its shape, the position of these floor bars can be made to correspond to the deformed portion of the steel plate. it can. During pressurization of the steel plate by the pressure ram, the platen side of the steel plate conveying line oscillates downward, and the retractable drive roller provided on the platen immerses below the surface of the platen and is applied by the pressure ram. The pressure can be effectively exerted on the steel plate. Further, the shape of the steel plate under the pressure ram can be immediately measured by the secondary shape measuring means provided in the pressure ram itself, and the process such as re-correction based on the quality of the correction can be quickly performed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing the outline of a correction device according to the present invention.

The straightening device includes a roller array 1 for conveying the steel plate S.
And a straightening machine 2 are provided, a primary measuring head 3 for detecting the shape of the steel sheet before straightening is provided on the upstream side of the straightening machine 2, and the straightening machine 2 is used for secondary measurement for detecting the shape of a specific surface of the steel sheet. A head 4 is provided.

Both the primary measuring head 3 and the secondary measuring head 4 utilize an optical system, and their outline is shown in FIG. This uses a triangulation method, and includes a pair of semiconductor lasers 43a and 43b forming a light projecting means, and a semi-transparent mirror (hereinafter, referred to as a semi-transparent mirror having a ratio of 1: 1 in transmittance and reflectance).
It has a combination of a "half mirror" 43c and a small television camera 43d that constitutes a light receiving means. In this system, a light beam (hereinafter, referred to as “laser beam”) emitted from one semiconductor laser 43a to the steel plate S is imaged on the detection device 43e of the small television camera 43d via the half mirror 43c. In addition, the other semiconductor laser 43
The laser beam emitted from b is the half mirror 43c.
Similarly, the image is formed on the detection device 43e of the small television camera 43d. Here, if there is a deformed portion on the surface of the steel plate S and the irradiation point is displaced, the beam spot moves and moves on the detection device 43e. Then, the detection device 43e is a two-dimensional element so that the spot images from the two semiconductor lasers 43a and 43b do not overlap on the screen. By arranging a large number of such imaging systems in the width direction of the steel plate S, multipoint displacement measurement is performed, and the displacement of the steel plate S ′ can be obtained by obtaining the horizontal position of the laser spot image.

Here, the primary measuring head 3 is incorporated under the pass line of the steel plate S as shown in FIG. 1, and a plurality of elements shown in FIG. 2 are assembled in a direction orthogonal to the pass line with the detection surface facing upward. Configured as placed. Then, the surface shape of the entire width of the steel plate S is measured by the optical system by the detection elements of each set. The secondary measuring head 4 for measuring the shape of the specific surface of the steel plate S is incorporated into the lower surface of the pressure ram 5 of the straightening machine 2 with the detection surface facing downward, as will be described later. The optical system is shown in Figure 2.
Is the same as that shown in.

Such primary and secondary measuring heads 3, 4
In the straightening line of the steel plate S respectively provided with, the shape measurement result by the primary measurement head 3 is imaged by a signal processing unit, a data processing unit or the like as shown in FIG. 1, and is three-dimensionally displayed on the CRT. Then, by analyzing this image display, the steel plate S to be rolled down
At the same time as setting the position, the pulse generator 301 is attached to the roller row 1 so that the shape displacement portion detected by the primary measuring head 3 is set in the straightening area of the straightening machine 2. It controls the setting and stopping of the feed amount together with the shape detection position.

Further, depending on the deformation state of the steel sheet S obtained by the measurement of the steel sheet S by the primary measuring head 3, the upper lay bars are respectively provided on the upper surface and the lower surface of the steel sheet S corresponding to the reduction straightening portion by the straightening machine 2. And the lower floor stick is set.
The setting of these upper and lower lay bars is performed based on the shape measurement by the primary measurement head 3 or the secondary measurement head 4, and if the surface shape measured by the secondary measurement head 4 immediately after straightening is defective, it is fed back again. And try the set again. Then, in this setting, the direction of the upper laid bar is determined by utilizing the rotation of the pressure ram around the axis, and at the same time, the interval between the upper laid bars is set. Further, the lower floor bar is positioned parallel to the direction of the upper floor bar according to the combination with the upper floor bar.

As described above, the surface shape of the steel plate S is measured by the primary measuring head 3 before the steel plate S enters the straightening machine 2 and by the secondary measuring head 4 for the steel plate S below the pressing ram 5. It can be straightened by the straightening machine 2 based on the shape measurement result, and does not require manual work by an operator as in the conventional case. Furthermore, since the shape of the steel sheet S after straightening can be measured by the secondary measuring head 4 provided in the straightening machine 2, the shape of the steel sheet S after straightening is measured, and if the steel sheet S is within the tolerance range, the steel sheet S is conveyed to the tolerance. If it is larger than the range, feed back again and try again. Therefore, based on the shape measurement of the steel plate S by the primary measurement head 3 and the secondary measurement head 4, the deformed portion of the steel plate S can be properly corrected by the straightening machine 2, and a highly accurate product can be obtained.

Next, the details of each part will be described with reference to the drawings.

FIG. 3 is a schematic plan view showing the entire straightening equipment,
FIG. 4 is a schematic front view showing a straightening machine portion.

The roller row 1 is provided with an entrance side roller conveyor 1a for sending the steel plate S to the straightening machine 2 and an exit side roller conveyor 1b for discharging the steel plate S after straightening, and a straightening device is provided between these roller conveyors 1a, 1b. Incorporate. A pair of conveying roller conveyors 1c and 1d for loading and unloading the steel plate S into and from the straightening machine 2 are provided in the portion sandwiching the straightening machine 2. These transport roller conveyors 1c and 1d are rotatably supported on the entrance side and the exit side roller conveyors 1a and 1b, and the tilt cylinders 1e and 1f respectively support the correction machine 2 side portions. With this structure, the transport roller conveyors 1c and 1d can be placed in a posture in which the ends on the side of the straightener 2 are inclined obliquely downward, so that the rolling force during straightening is not applied to the transport line.

The primary measurement head 3 described above is provided between the entrance side roller conveyor 1a and the transfer conveyor 1c.

The primary measuring head 3 is composed of a plurality of (18 in the example of FIG. 1) sensor units 3e arranged in a direction orthogonal to the line, and these sensor units 3e are as shown in FIG. Is installed below the pass line of the steel plate S.

By incorporating this primary measuring head 3 in front of the conveying roller conveyor 1c, the shape of the entire width of the lower surface side of the steel plate S fed into the straightening machine 2 can be measured, and the size of the deformed portion such as warp or ear wave can be measured. You can know its position. Then, the result of the shape measurement by the primary measurement head 3 is input to the control system for calculation, and the operation of the straightening machine 2 and the position setting of the floor bar are controlled in accordance with the arrival of the straightening portion at the straightening machine 2. .

FIG. 5 is a view of the straightening machine 2 viewed in the pass line direction.

The straightening machine 2 is provided with a gate-shaped frame 2a straddling the pass line, a pressure ram 5 is incorporated in the frame 2a, and a surface plate 6 is provided below the pressure ram 5. A traveling carriage 2b is provided on the upper surface of the frame 2a so as to be capable of traveling by driving a motor 2d in a direction orthogonal to the pass line.
Then, a traveling position detecting device 2a-1 utilizing an appropriate detecting means for detecting the position of the traveling carriage 2b is provided in the frame 2a in parallel with the traveling direction of the traveling carriage 2b, while the traveling carriage 2b is provided with The pressure ram 5 is connected. Pressure ram 5
Has a rectangular parallelepiped lower part, and is rotatably connected to the traveling carriage 2b so that the posture thereof can be changed every 90 degrees around its axis. Due to this connection structure, the traveling carriage 2b is provided with a drive motor 2e for rotationally driving the pressure ram 5.

With such a structure, the pressure ram 5 can freely change its position in the direction crossing the pass line,
It can be set right above the straightening position of the steel plate S. Further, when the pressure ram 5 is rotated by 90 degrees about its axis by the drive motor 2e, the posture of the steel plate S of the upper laying bar, which will be described later, in the pass direction can also be changed.

The pressure ram 5 not only corrects the shape of the steel plate S, but also provides the secondary measuring head 4 as described above, so that the condition of the specific surface of the steel plate S, which is the portion to be corrected of the steel plate S, can be improved. Incorporate a means to measure immediately. This secondary measurement head 4 is composed of a plurality of sensor units 4a incorporated by utilizing the lower surface of the pressure ram 5 as shown in FIG. As shown in FIG. 7, the sensor unit 4a is incorporated so as to be embedded in the groove 5a formed in the lower surface of the pressure ram 5, and the lower end thereof is slightly higher than the lower surface of the pressure ram 5 to form the steel plate S. Avoid contact with. Further, the same figure shows the internal structure of the sensor unit 4a, and the optical system of this sensor unit 4a is similar to that shown in FIG.
It is provided with a pair of semiconductor lasers 4b and 4c, a half mirror 4d and a television camera 4e. Then, in the illustrated example, a total of eight shape detection points are set in the width direction of the steel sheet S by combining four sensor units 4a in one row and arranged in a total of six rows in the traveling direction of the steel sheet S. By doing so, a total of 48 planar shape detection points are developed. Note that FIG. 8 is a schematic diagram showing the appearance of the shape detection points.
a takes charge of eight detection points CH1 to CH8 in total, and CH1 to CH48 are arranged depending on the arrangement of the sensor unit 4a group in six rows.
Is the detection point of the plane matrix of.

One primary measuring head 3 has two sets of optical systems shown in FIG. 2 built in parallel, and two rows × two sets × 18 sets in the direction orthogonal to the pass line detect 72 points. I am trying.

Now, the detection of the surface shape of the steel sheet S by the primary measuring head 3 and the secondary measuring head 4 and the subsequent arithmetic processing will be described. Since the detection and the calculation process are the same for both the primary measurement head 3 and the secondary measurement head, the secondary measurement head 4 shown in FIGS. 6 and 7 will be described here.

In FIG. 7, the television camera 4e of the sensor unit 4a receives the reflected light of the laser beam emitted from the semiconductor lasers 4b and 4c from the surface of the steel plate S, and according to the measuring principle described in FIG. Measure the shape of. Then, the output signal from the television camera 4e is input to the arithmetic circuit, and the condition of the surface shape of the steel plate S is output from the arithmetic circuit.

FIG. 9 shows the outline of the arithmetic circuit.
This is provided with a displacement calculation means 20 which receives a signal from the sensor unit 4a and calculates the displacement of the steel plate S. The displacement calculating means 20 receives the laser beams from the two semiconductor lasers 4b and 4c by the television camera 4e which receives them through the half mirror 4d, and calculates them as distance data between the light receiving device and the steel plate S. At this time, if the parallelism between the sensor unit 4a and the steel plate S is not ensured, the output of the displacement calculation means 20 will not correctly reflect the shape of the steel plate S. Therefore, the arithmetic circuit is provided with the inclination correcting means 21, which corrects the non-parallel portion (inclination), and the steel plate S
The shape of is calculated with high accuracy. Then, this inclination correction means 2
The signal from 1 is finally calculated by the shape calculating means 22 of the steel plate S, and the output signal is input to each control unit.

Here, the operation of the inclination correcting means 21 will be described.

FIG. 10 is a diagram schematically showing how the specific surface of the steel plate S after rolling is deformed, and the measurement positions by the sensor unit 4a group are set to points CH1, CH2, ... CH48. . Then, the space coordinate axes (X, Y, Z) are taken, and CH1 to CH8 ... CH41 to CH4 in the X axis direction.
8 are arranged, and CH1 to CH41 ... C in the Y-axis direction.
H8 to CH48 are arranged. The distribution arrangement of such detection points is the same as that shown in FIG.

Now, among the detection points CH1 to CH8, the distance deviations of the remaining four channels are calculated with reference to the minimum distance of the four channels, and the distance deviations are graphed as shown in FIG. Next, similarly for the second column (CH9 to CH16), the deviation of each channel is obtained based on the minimum distance data in the second column, and is similarly graphed in FIG. This is performed up to the sixth column, and Z = aX + is calculated from the graph by the method of least squares.
The linear regression equation of b is calculated. The inclination of this linear expression is the amount of inclination of the steel sheet S in the X-axis direction.

Next, a graph is made as shown in FIG. 12 in the Y-axis direction of the detection points CH1 to CH41. Further, the detection points CH2 to CH42 are similarly processed to detect the detection point CH8.
Up to CH48 are sequentially graphed to obtain a linear regression equation by the least squares method. The obtained linear expression is the amount of inclination of the steel plate S in the Y-axis direction.

From the two linear expressions obtained above, CH1 to C
The inclination correction means 21 performs inclination correction of each displacement data of H48.
By two-dimensional. Then, after this inclination correction is performed, the three-dimensional shape of the steel plate S is obtained by the shape calculation means 22. The secondary measuring head 4 measures the specific surface of the steel plate S in a stationary state, while the primary measuring head 3
Is for measuring the running steel plate S, the measurement is performed at predetermined intervals (movement amount) in the running direction of the steel plate S.
The measurement point (on the line orthogonal to the pass line direction) is processed as a continuous operation to measure the shape of the steel plate S. Then, these measurement points are obtained as position data of the steel plate S by the pulse generator 301.

With the above measuring method and calculation, the primary measuring head 3 continuously measures the surface shape of the steel sheet S before straightening, and the portion of the steel sheet S to be straightened by the straightening machine 2 and the size of its deformation, etc. Can be known in advance. Therefore, according to the situation of the steel plate S obtained by the primary measurement head 3, it is possible to accurately determine the installation position, the interval, and the direction of the floor bar described later. Further, since the secondary measuring head 4 is provided on the lower surface of the pressure ram 5, the shape of the steel plate S can be directly measured immediately after the correction by the pressure ram 5. For this reason,
Since the shape of the straightened steel sheet S can be measured before being sent to the discharge side, if it is larger than the tolerance, straightening by the pressure ram 5 can be performed again. Therefore, even if the correction of the shape of the steel plate S before the correction is insufficient, the correction can be performed while compensating for it, and a high quality steel plate S can be obtained.

Further, the pressure ram 5 is provided with an upper laying bar for changing the rolling position according to the state of deformation of the steel plate S. FIG. 13 is a front view showing the upper floor bar and its drive system as seen in the pass line direction, and FIG. 14 is a bottom view thereof.

The pair of upper laying bars 7a and 7b are arranged in parallel to each other so that the height of the pressing ram 5 is slightly apart from the bottom surface thereof. These upper spread bars 7a and 7b are movable by a motor 7c provided on the side surface of the pressure ram 5 as a drive source in a direction away from each other and a direction toward each other. For this driving, bracket screws 7d provided on both side surfaces of the pressure ram 5 are rotatably provided with screw screws 7e having left and right reverse screws, and these screw screws 7e are rotated by a drive belt 7f and a transmission belt 7g. . The upper floor bars 7a and 7b are movable elements 7 each having a vertical axis.
They are connected to the screw screw 7e by h and 7i, respectively. Further, the set of these upper laying bars 7a and 7b is based on the calculation result by the primary measuring head 3 and the motor 7c.
The rotation amount is set by the proximity switch that detects the moving elements 7h and 7i at each mutual setting interval (from zero to the effective width of the pressure ram 5) determined by the rotation direction of the output shaft and the combination with the lower floor bar described later. And let it be done automatically.

The connecting structure between the rods of the movers 7h and 7i and the upper spread bars 7a and 7b allows both ends of the upper spread bars 7a and 7b to freely move up and down. This allows
When the pressure ram 5 floats in the air, the upper floor bars 7a and 7b
Is located slightly below the lower surface of the pressure ram 5, and at this time the positions of the upper spread bars 7a and 7b are changed by rotating the screw screw 7e. And at the time of correction, first, the upper floor stick 7
Since a and 7b are placed on the upper surface of the steel plate S and then the bottom surface of the pressure ram 5 is moved so as to be placed on the upper laying bars 7a and 7b, finally the pressing force of the pressure ram 5 is increased. , 7b to the upper surface of the steel plate S.

When the motor 7c is operated by the drive system for the upper floor bars 7a and 7b, the screw screw 7e
Rotates. Since the two upper spread bars 7a and 7b are screwed into the screw screws 7e whose screw directions are different from each other, the two upper spread bars 7a and 7b are shown in FIG. 14 according to the rotation direction of the screw screws 7e. To move away from each other or to move closer to each other. Therefore, the positions of the upper spread bars 7a and 7b can be freely changed, and the positions of the upper spread bars 7a and 7b can be set in correspondence with the positions of the deformed portions of the steel plate S.

Further, as shown in the figure, the bracket 7d projects outward from the side surface of the pressure ram 5, and the length of the screw screw 7e is made larger than the width of the pressure ram 5, so that the secondary When the shape of the steel sheet S is measured by the measuring head 4, the upper spread bars 7a and 7b are located outside the area of the bottom surface of the pressure ram 5, and the measurement can be performed without being affected by the upper spread bars 7a and 7b.

On the other hand, the surface plate 6 is provided with a lower floor bar that receives the lower surface of the steel plate S. FIG. 15 is a surface plate 6 showing the arrangement of the lower floor bar.
16 is a plan view of a portion, FIG. 16 is a view seen in the pass line direction, and FIG. 17 is a sectional view taken along the line AA of FIG.

The lower floor bar has two first lower floor bars 8a and 8b whose length directions are parallel to the pass line and three second lower floor bars 9a and 9 which are orthogonal to the pass line.
It is configured by a combination of b and 9c. The first lower lay bars 8a and 8b are fixed on sliders 8c and 8d which slide on the surface plate 6 in a direction orthogonal to the pass line, and these sliders 8c and 8d are shifted to the shift motors 8e and 8e.
They are moved individually by 8f. The shift motor 8e for moving one of the first lower floor bars 8a has a drive shaft 8g.
The output shaft is connected to the drive shaft 8g, and the pulley 8l is connected to both ends of the drive shaft 8g. The wire 8h wound around the pulley 8l is coupled only to the slider 8c and the other slider 8c.
In d, the hole formed in this is inserted and it can move freely. Similarly, the output shaft of the shift motor 8f for moving the other first lower laying bar 8b is also connected to the drive shaft 8i,
A pulley 8m is connected to the drive shaft 8i. This pulley 8
The wire 8j wound around m is coupled only to the slider 8d, and is simply inserted into the other slider 8c to be freely movable. Further, on the surface plate 6 on the side opposite to the shift motors 8e and 8f, pulley rows 8k of wires 8h and 8j are provided.

When the shift motors 8e and 8f are operated by the drive system of the first lower laying bars 8a and 8b, the sliders 8c and 8d are moved to arbitrary positions and arbitrary amounts through the wires 8h and 8j. To do. Therefore, the two first lower lay bars 8a and 8b can be changed in position in the direction parallel to the pass line on the surface plate 6 and the distance between them can be changed. It is possible to set according to the position and size. In addition, as shown by the one-dot chain line in FIG.
It is also possible to retract the first lower laying bars 8a, 8b of the book to the outside of the steel plate S passing by.

The second lower lay bars 9a, 9b, 9c are arranged in parallel with each other and are incorporated in the surface plate 6 so as to be movable back and forth in a direction orthogonal to the pass line of the steel plate S. As shown in FIG. 17, the surface plate 6 is provided with three grooves 6a, 6b, 6c, and the second lower spread bars 9a, 9c are respectively inserted into these grooves 6a, 6b, 6c.
Sliders 10a, 10b and 10c, to which b and 9c are fixed, are slidably fitted. The slider 10 is provided at one end of the surface plate 6.
First shift motor 1 for driving a and 10c at the same time
A second shift motor 12 for driving the first slider 10b and the remaining slider 10b is provided. The first shift motor 11 has a drive shaft 11a connected to its output shaft and a second lower spread bar 9a, which is formed by two wires 11b and 11c wound around the drive shaft 11a.
9c sliders 10a and 10c are connected. Also, the second
Similarly, in the shift motor 12, the drive shaft 12a and the wire 12b connect the slider 10b of the remaining second lower floor bar 9b. These wires 11b, 11c,
12b is wound around a pulley row 13 provided on the opposite side of the first and second shift motors 11 and 12 to form a closed loop. Then, as shown in the figure, the sliders 10a, 10
Each wire 11 by utilizing the portion penetrating b, 10c
b, 11c and 12b are respectively provided with sliders 10a and 1b.
0b and 10c are integrated, and from the pulley train 13 to the drive shaft 11
Wires 11b, 11c, 12 of the path returning to a, 12a
b is a slider 10a, 10b, 10c and a groove 6 respectively.
The wiring passes through the gaps between a, 6b, and 6c.

Such second lower floor bars 9a, 9b, 9c
When the first shift motor 11 is operated by the drive system of No. 2, only the second lower spread bars 9a and 9c at both ends simultaneously move in the same direction by the same amount. In addition, the second shift motor 12
Is operated, only the second lower floor bar 9b at the center moves. Therefore, it is necessary to use only the two second lower spread bars 9a and 9c, to use the single second lower spread bar 9b, or to use all of these second lower spread bars 9a, 9b and 9c. It will be possible.

Further, as shown in FIG. 16, the surface plate 6 is provided with a plurality of drive rollers 14 which can be raised and lowered to a position below the upper surface and protruding from the surface. Each of these drive rollers 14 is supported by a lift cylinder 14a, and can freely move up and down in conjunction with each other or independently. Then, when the steel plate S is passed, it is raised to the same height as the roller row 1 for smooth conveyance, and when the lower laying bars 8a to 9c are set, it is further raised to lift the steel plate S to raise the platen 6 A sufficient gap is provided between the upper surface and the lower surface of the steel plate S. Then, when the setting of the lower laying bars 8a to 9c is completed, the lowering bar 14a lowers the lower surface of the surface plate 6 to move the steel plate S.
Are placed on the lower spread bars 8a to 9c.

In the above construction, the shape of the steel plate S conveyed from the entrance roller conveyor 1a toward the straightener 2 is measured by the primary measuring head 3 utilizing the optical system in front of the conveyor roller conveyor 1c. Then, the result of the shape measurement is processed by the arithmetic unit, various controllers, etc. together with the position detection signal, and the position of the portion for correcting the shape is input to the controller. After that, the rotation of the roller is measured by the pulse generator 301 so that the portion to be straightened is stopped in the working area of the straightener 2, and the straightened portion of the steel plate S is correctly positioned and stopped in the straightener 2. .

Meanwhile, on the straightening machine 2 side, the upper spread bars 7a, 7b and the first lower spread bars 8a, 8 necessary for correcting the shape are formed.
The positions of b and the second lower spread bars 9a to 9c are set by the respective motors 7c and shift motors 8e, 8f, 11 and 12. This set is based on the calculation of the measurement result by the primary measuring head 3 and the motor 7c and the shift motor 8
The rotation direction and rotation amount of the output shafts e, 8f, 11 and 12 are set. Furthermore, such first and second
Not only the setting of the lower floor bars 8a, 8b, 9a to 9c, but also the position setting of the pressure ram 5 by the traveling carriage 2b and the rotation of the pressure ram 5 by the drive motor 2e are controlled. That is, when the width of the steel plate S is larger than the size of the bottom surface of the pressure ram 5, the traveling carriage 2b is moved to align the position of the pressure ram 5 with the correction portion. The drive ram 2e rotates the pressure ram 5 according to whether the upper spread bars 7a and 7b are in a direction orthogonal to the pass line or in a direction parallel to the pass line, depending on the state of deformation of the correction portion. And the first lower floor bar 8a, 8b or the second floor bar on the side parallel to the upper floor bars 7a, 7b.
Combine with the lower floor bars 9a to 9c.

After such setting, the operator lowers the pressure ram 5 by the operation panel to press the straightened portion of the steel plate S to straighten it. FIG. 18 shows a state in which the upper spread bars 7a and 7b are set in a direction orthogonal to the pass line and pressure correction is performed by the second lower spread bar 9b in the same direction.

After the correction by the pressure ram 5, the pressure ram 5 is raised to the measuring position and the secondary measuring head 4 measures the shape of the corrected portion. This measurement result is calculated by a calculation unit and various controllers, and when it is confirmed that the degree of deformation is within the tolerance, the pressure ram 5 is raised to the standby position and the steel plate S is sent to the exit side roller conveyor 1b side. ,
Wait for the arrival of the next correction. If the degree of deformation is larger than the tolerance, the upper floor bars 7a, 7b and the first and second lower floor bars 8a, 8b, 9 are again measured based on the shape measurement result.
The positions of a to 9c are set again, and the pressure ram 5 is used to correct the position again. By such a procedure, the steel plate S sent is preliminarily measured by the primary measuring head 3 to adjust the posture of the straightener 2, and after the straightening, the secondary measuring head 4 confirms the straightening condition.

As described above, the shape of the steel sheet S being conveyed can be automatically confirmed by the pressure ram 5 after the shape is corrected. Therefore, as compared with the conventional work that requires manual labor, safety is secured and at the same time work efficiency is improved. Further, since the shape measurement is also performed by the measuring means such as an optical system, the product can be maintained with high accuracy, and the variation in quality due to the difference in skill among workers is eliminated.

[0055]

According to the present invention, the shape of the steel sheet before straightening is automatically measured, and the direction and position of the upper floor bar of the pressure ram and the lower floor bar of the surface plate are determined based on the shape measurement result. The position can be quickly set to the position corresponding to the deformed portion of the steel plate. Therefore, as compared with the conventional case where the line is stopped, the worker measures the shape, and the upper and lower laying bars are manually set, the work can be automatically performed, and safety work and productivity can be improved.

Further, since the measuring head is constructed by combining a plurality of optical systems for forming the reflected light of the two light fluxes emitted from the two light projecting means on one light receiving means through the semitransparent mirror, Not only the number of light receiving means is reduced by half as compared with the conventional one, but also the shape measuring means is downsized. Further, since the shape measuring means can be made small, the required number of secondary measuring heads can be embedded in the lower surface of the pressure ram of the straightening machine, so that the restrictions on the equipment can be eliminated and the steel plate by the pressure ram can be The shape of the portion to be corrected can be detected.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a correction device of the present invention.

FIG. 2 is a diagram showing a principle of shape measurement by a measuring head.

FIG. 3 is a plan view of the entire correction facility.

FIG. 4 is a front view showing a straightening machine portion and upstream and downstream portions thereof.

FIG. 5 is a view of a pressure ram and a traveling carriage portion of the straightening machine as viewed in the pass line direction.

FIG. 6 shows the incorporation of the secondary measuring head in the pressure ram.

FIG. 7 is a diagram showing an internal structure of a sensor unit of the secondary measurement head and an optical system for detecting a steel plate shape.

FIG. 8 is an explanatory diagram showing a distribution of detection points by the measurement head.

FIG. 9 is a block diagram of a calculation circuit that calculates a shape of a steel sheet by receiving a signal from a measuring head.

FIG. 10 is a diagram showing distribution of detection points on a steel plate and spatial coordinates for detection.

11 is a graph showing the height displacement of the steel sheet in the X-axis direction in the spatial coordinates of FIG.

12 is a graph showing the height displacement of the steel sheet in the Y-axis direction in the spatial coordinates of FIG.

FIG. 13 is a front view of an upper floor bar provided in the pressure ram, as viewed in the pass line direction, together with its drive system.

FIG. 14 is a bottom view of FIG.

FIG. 15 is a plan view showing the arrangement of lower floor bars provided on the surface plate.

FIG. 16 is a diagram showing an arrangement of lower laid bars in a pass line direction.

17 is a view taken along the line AA of FIG.

FIG. 18 is a diagram showing a correction state of a steel plate by a pressure ram.

[Explanation of symbols]

 1 Roller Row 2 Straightening Machine 3 Primary Measuring Head 4 Secondary Measuring Head 5 Pressurizing Ram 6 Surface Plate 7a, 7b Upper Laying Bar 8a, 8b First Lower Laying Bar 9a, 9b, 9c Second Lower Laying Bar 14 Drive Roller S Steel plate S'steel plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshi Oishi No. 1 Nishinosu, Oita City, Oita Prefecture Shin Nippon Steel Co., Ltd. Oita Works (72) Yoshinobu Nagai No. 1 Nishinozu, Oita City, Oita Prefecture Made by New Japan Oita Steel Co., Ltd. (72) Inventor Toshihide Nakano 1 Nishinosu, Oita City, Oita Prefecture Shinnihon Steel Co., Ltd. Oita Steel Co., Ltd. (72) Inventor Katsuya Ueki 1 Wadazaki-cho, Hyogo-ku, Kobe-shi No. 1-2 Mitsubishi Electric Co., Ltd. Control Works (72) Inventor Kazuo Takashima 8-1-1 Tsukaguchihonmachi, Amagasaki City, Hyogo Prefecture Mitsubishi Electric Co., Ltd. Industrial Systems Laboratory (56) References (JP, Y1)

Claims (2)

(57) [Claims] 1. A pair of lines which conveys a steel sheet and is swingable, a rotatable pressure ram which straightens a portion to be corrected of the steel sheet in the middle of the line, and a rotatable ram which is capable of projecting and retracting from the surface thereof. A straightening machine having a surface plate provided with a plurality of rows of driving rollers, and in front of the straightening machine, a primary shape measuring means for continuously measuring the surface shape of a steel sheet being conveyed is provided, and the pressure ram is provided. The secondary shape measuring means for measuring the surface shape of the specific surface of the steel plate in the pressure reduction by the pressure ram is provided in the lower concave portion of the pressure ram, and the upper lay bar installed on the upper surface of the steel plate is used as the path of the steel plate. A movably connected inward and outward direction of the line, a lower laying bar installed on the lower surface of the steel plate on the surface plate is movably connected inward and outward directions of the path line of the steel plate, and the shape measurement result by the shape measuring means. Based on the above-mentioned upper floor bar and lower part A straightening device characterized by controlling the movement of a floor bar. 2. The shape measuring means is provided on the surface of the steel plate to be 2
Two light projecting means for projecting light fluxes of the system, a light receiving means for receiving the two system light fluxes reflected on the surface of the steel plate through a semitransparent mirror, and an output from the light receiving means The straightening device according to claim 1, further comprising: a displacement detecting unit that calculates a displacement of the surface; and a unit that calculates a surface shape of the steel plate from the displacement of the steel plate detected by the displacement detecting unit.