JP2020041844A - Gravity compensation jig and steel-plate shape correction device - Google Patents

Abstract

To provide a gravity correction jig which is capable of reducing the gravitational moment on the rotation axis in the installation orientation and used for a shape measuring device to measure a shape such as warpage of a steel plate, and also to provide a steel-plate shape correction device for correcting the shape of the steel plate using the shape measuring device equipped with the gravity compensation jig.SOLUTION: Disclosed is a gravity compensation jig 1 used for a steel-plate shape measuring device 15 equipped with a laser light source 19, which includes: a measuring device fixing part 2 for fixing the shape measuring device; a rotation mechanism part 3 which rotates the measuring device fixing part in the rotation direction of the shape measuring device; a support beam part 4 which supports the rotation mechanism part; and a gravity compensation part 5 for compensating for a load received by a supporting beam part by self-weight of the shape measuring device.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a gravity compensating jig used for a shape measuring device for measuring a shape such as warpage of a steel sheet, and a steel sheet shape correcting device for correcting the shape of a steel sheet using a shape measuring device provided with the gravity compensating jig.

  In the manufacture of steel sheets, shape defects such as warpage, ear waves, and distortion may occur in the rolling and cooling steps. Particularly, in the case of a thick steel plate having a thickness of 40 mm or more, poor shape is likely to occur due to a high load during rolling. When a shape defect occurs in a steel sheet, the shape is corrected in a post-process to remove the shape defect. In order to obtain a sufficient correction effect, it is desired to accurately measure shapes such as warpage of a steel sheet.

  As a method for measuring the shape of a steel sheet, there is a method of measuring the shape of a steel sheet using a measuring device using a laser light source. For example, in Patent Literature 1, a measuring device including a plurality of optical distance meters is installed on a conveyance line of a steel plate, and a distance from a reflection state of light from the steel plate passing through the measuring device to a surface of the steel plate, That is, a technique is described in which the height of a steel sheet surface is detected and the shape of the steel sheet surface is measured by making the height continuous.

  Patent Document 2 discloses a device (so-called three-dimensional scanner) for measuring distance data by performing multiaxial rotation scanning with laser light from a single laser light source to measure the surface shape of a steel plate that is stationary on a transport line. The technology to do this is described.

JP-A-5-237546 JP 2010-155272 A

  The apparatus for measuring the shape of a steel plate described in Patent Documents 1 and 2 measures the distance to the steel plate using a laser light source provided above the steel plate. In these measuring devices, the laser light source is installed perpendicular to the steel plate surface.

  Here, with reference to FIG. 7, the error of the measured value in the steel sheet shape measuring device 15 using the above-mentioned laser light source (not shown) was examined. As the errors, “a measurement error in the height direction (hereinafter, referred to as a height error) dz”, a “rotation angle error dφ”, a “distance error dr”, and a “turn angle error dθ” are used. FIG. 7 shows a side view in the case where the laser light source is installed perpendicularly to the surface of the steel plate as an example. As shown in FIG. 7, the length in the width direction of the steel plate S to be measured is x, the length in the longitudinal direction of the steel plate S to be measured is y, and the distance between the shape measuring device 15 and the surface of the steel plate S (that is, the shape measurement is performed). Assuming that Z is the installation height of the device 15 and R is the distance between the shape measuring device 15 and the end of the steel plate S, the measurement error dz in the height direction is the error of the measurement result of the steel plate shape including all errors. Point to. The rotation angle error dφ indicates an error due to rotation of the galvanomirror. The distance error dr indicates an error exerted by the position of the measurement target (measurement distance). The turning angle error dθ indicates an error exerted by turning of the shape measuring device 15.

  When the laser light source is installed perpendicular to the surface of the steel plate, the measurement error dz in the height direction can be expressed by the following equation (1). From equation (1), when the laser light source is installed in a direction perpendicular to the surface of the steel sheet, each distance R in the longitudinal direction y of the shape measuring device 15 and the steel sheet S and in the width direction x of the shape measuring device 15 and the steel sheet S. , The rotation angle error dφ increases.

  On the other hand, when the laser light source is installed horizontally with respect to the steel sheet surface, the measurement error dz in the height direction can be expressed by the following equation (2). From equation (2), when the laser light source is installed in the horizontal direction with respect to the surface of the steel sheet, the rotation angle error dφ increases as the distance R in the longitudinal direction y between the shape measuring device 15 and the steel sheet S increases. As the distance R between the measuring device 15 and the steel sheet S in the width direction x increases, the influence of the rotation angle error dφ decreases.

  From the above, it has been found that measurement accuracy can be improved by installing (horizontally) the rotation axis of the shape measuring device so as to be horizontal to the surface of the steel plate to be measured. However, when the rotation axis of the shape measuring device is installed so as to be horizontal with respect to the surface of the steel plate, a load of the rotation shaft increases because a gravity moment is applied to the rotation shaft by the weight of the shape measurement device. As a result, there has been a problem that the rotation speed of the shape measuring device becomes unstable and the rotation operation is defective.

  Further, due to such a problem, there is no actual configuration in which the shape measuring device is placed horizontally.

  The present invention has been made in view of the above problems, and provides a gravity compensating jig used for a shape measuring device, and a steel sheet shape correcting device that corrects the shape of a steel sheet using the shape measuring device equipped with the gravity compensating jig. The purpose is to do.

  The present inventors have conducted intensive studies in order to achieve the above object, and have obtained the following findings.

  As described above, it is important for the shape measuring device that measures the warpage of the steel plate or the like to reduce the gravitational moment on the rotating shaft caused by the installation direction. It has been found that it is effective to provide a jig for compensating for the gravity of the shape measuring device in order to reduce the gravitational moment on the rotating shaft caused by the installation direction of the shape measuring device provided with the laser light source. Specifically, the jig reduces the load on the rotating shaft due to the weight of the shape measuring device by fixing the shape measuring device main body and preventing the rotation of the shape measuring device and the scanning range from being hindered. I found that I can do that.

The present invention has been made based on the above findings, and has the following gist.
[1] A gravity compensation jig used for a steel sheet shape measuring device provided with a laser light source,
A measuring device fixing section for fixing the shape measuring device,
A rotation mechanism unit that rotates the measurement device fixing unit in the rotation direction of the shape measurement device,
A support beam for supporting the rotation mechanism,
A gravity compensating part for compensating a load applied to the supporting beam part by a weight of the shape measuring device.
[2] The gravity compensating jig according to [1], wherein the rotating mechanism is installed horizontally with respect to the surface of the steel plate to be measured.
[3] The gravity compensation jig according to [1] or [2], wherein the rotation mechanism is provided so as not to block an optical path of the laser light source.
[4] The gravity compensation jig according to any one of [1] to [3], wherein the gravity compensation unit is one of an elastic member and a counterweight.
[5] A shape correcting device for a steel plate, comprising a shape measuring device provided with the gravity compensation jig according to any one of [1] to [4].

  According to the present invention, since the gravity compensating jig is installed on the rotation axis of the steel sheet shape measuring device using the laser light source disposed horizontally with respect to the surface of the steel plate to be measured, the gravity (self-weight) of the shape measuring device is used. Can compensate for the load on the rotating shaft. This improves the measurement accuracy of the shape measuring device. Further, by applying the shape measuring device equipped with the gravity compensation jig of the present invention to a shape correcting device for a steel plate, shape correction based on an appropriate steel plate shape becomes possible, and a steel plate having an excellent steel plate shape can be manufactured. .

FIG. 1 is an overall configuration diagram illustrating an apparatus for correcting the shape of a steel sheet provided with a shape measuring device having a laser light source according to an embodiment of the present invention. FIG. 2 is a configuration diagram illustrating a shape measuring device in the steel sheet shape correcting device shown in FIG. FIG. 3 is an example of a gravity compensation jig according to one embodiment of the present invention, and is a side view of a shape measuring device provided with the gravity compensation jig. FIG. 4 is another example of the gravity compensation jig according to one embodiment of the present invention, and is a side view of a shape measuring device provided with the gravity compensation jig. FIG. 5 is another example of the gravity compensation jig according to the embodiment of the present invention, and is a side view of a shape measuring device provided with the gravity compensation jig. FIG. 6 is a graph showing a turning angle difference of the shape measuring device according to the embodiment of the present invention. FIG. 7 is a diagram for explaining an error of a measured value in the steel sheet shape measuring apparatus.

  Hereinafter, the present invention will be described in detail.

  The present invention relates to a gravity compensation jig used for a shape measuring device for a steel plate provided with a laser light source, wherein the measuring device fixing portion for fixing the shape measuring device, and a rotation for rotating the measuring device fixing portion in the rotation direction of the shape measuring device. This is a gravity compensation jig having a mechanism, a supporting beam for supporting the rotating mechanism, and a gravity compensating unit for compensating a load applied to the supporting beam by the weight of the shape measuring device. Further, the present invention is a shape correcting device for a steel plate having a shape measuring device provided with the gravity compensation jig.

  The gravity compensation jig of the present invention is a jig for performing gravity compensation of the shape measuring device. INDUSTRIAL APPLICABILITY The present invention can be applied to, for example, a shape measuring apparatus for measuring the shape of a steel sheet using a laser light source in an ironworks or the like. Here, as an example, a case in which the present invention is applied to a steel sheet shape correction device provided with a shape measurement device will be described. Note that the present invention is not limited to this embodiment.

  First, a shape measuring device for mounting a gravity compensation jig of the present invention, which will be described later, and a shape correcting device including the shape measuring device will be described with reference to FIGS. FIG. 1 shows an overall configuration of a steel sheet shape correcting device 10 having a shape measuring device 15 according to one embodiment of the present invention. FIG. 2 shows a configuration of a shape measuring device 15 including the laser light source shown in FIG.

  As shown in FIG. 1, a steel sheet shape straightening device 10 (hereinafter, referred to as a shape straightening device) includes a press machine 11 for straightening a steel sheet S, an entry-side transfer table 13 disposed on the entry side of the press machine 11, It has an output side transfer table 14 disposed on the output side of the press machine 11, a shape measuring device 15, a control device 16, and tracking devices 17 and 18 disposed on the side of the input side transfer table 13. A number of rollers for transporting the steel sheet S are disposed on the entrance and exit transport tables 13 and 14. The shape measuring device 15 and the control device 16 are provided side by side above the gantry 22. The tracking devices 17 and 18 detect the position of the steel sheet S by obtaining the transport amount of the steel sheet S using, for example, the rotation amount of the rollers of the entrance-side transport table 13.

  The shape correcting device 10 presses the steel sheet S from above with the pressurizing ram 12 of the press machine 11 to apply a bending moment to the steel sheet S in order to remove shape defects such as warpage and distortion of the steel sheet generated in a rolling process and the like. Let it. Thereby, the shape correction device 10 corrects the shape of the steel plate. At this time, the control device 16 controls the press machine 11 and the entrance and exit conveyance tables 13 and 14 based on the shape of the steel sheet S measured by the shape measurement device 15 so that appropriate correction can be performed. .

  The shape measuring device 15 includes a laser light source 19, a turntable 20, and a galvanomirror 21, as shown in FIG. The laser light source 19 is mounted on a turntable 20, and a galvanomirror 21 is provided facing the laser emission port of the laser light source 19. In the shape measuring device 15 of the present invention, the rotation axis of the turntable 20 is horizontal with respect to the surface of the steel sheet transferred on the transfer tables 13 and 14 (not shown). The rotation axis of the galvanomirror 21 is orthogonal to the rotation axis of the turntable 20. That is, the shape measuring device 15 is placed horizontally so as to be horizontal to the surface of the steel plate S to be measured.

  The laser beam from the laser light source 19 is polarized mainly in the width direction of the steel sheet S (that is, in the direction orthogonal to the transport direction indicated by the double-headed arrow in FIG. 1) by rotating the galvanometer mirror 21. The laser light polarized from the galvanomirror 21 scans mainly in the longitudinal direction of the steel sheet S (that is, the above-described transport direction) by rotating the turntable 20. The shape measuring device 15 detects the polarization of the steel sheet S and the distance to the reflection position of the laser beam (that is, the detection point) within the scanning range, and calculates the length of the steel sheet S from the point cloud data of the detected distance data. Measure shapes such as width and thickness. Note that, for detecting the distance data, for example, a known phase difference method can be used.

  As described above, in a general steel sheet shape correction device, the rotation axis of the turntable of the shape measuring device is perpendicular to the surface of the steel plate S to be measured, that is, the turntable is suspended upside down from the gantry. To be installed in However, in the present invention, from the viewpoint of improving the measurement accuracy, the rotation axis of the turntable 20 of the shape measuring device 15 is disposed horizontally with respect to the surface of the steel sheet S to be measured. With such an arrangement, the influence of the rotational operation failure is caused by the weight of the shape measuring device 15, and it is important to compensate for the influence. Therefore, in the present invention, a gravity compensation jig capable of reducing the risk of a rotational operation failure of the shape measuring device 15 has been completed.

  Hereinafter, the gravity compensation jig of the present invention will be described with reference to FIGS. 3 to 5 are side views illustrating a state in which the shape measuring device 15 illustrated in FIG. 2 is fixed by the gravity compensation jig 1. In addition, the shape measuring device 15 is installed horizontally with respect to the gantry 22.

  As shown in FIGS. 3 to 5, the weight compensation jig 1 of the present invention includes a measurement device fixing unit 2, a rotation mechanism unit 3, a support beam unit 4, and a gravity compensation unit 5.

  The measurement device fixing unit 2 is a device that is fixed by being sandwiched so as to surround the housing of the shape measurement device 15. The measuring device fixing part 2 is formed in, for example, a U shape in a side view.

  The rotation mechanism unit 3 rotates the measuring device fixing unit 2 in the rotation direction of the shape measuring device 15. The rotation mechanism unit 3 is provided so as to be located between the measuring device fixing unit 2 and the shape measuring device 15 with the gravity compensation jig 1 attached to the shape measuring device 15. The rotation of the measurement device fixing unit 2 and the shape measurement device 15 can be synchronized by the rotation mechanism unit 3. As the rotation mechanism 3, for example, a bearing, a bush (slide bearing), or the like can be used.

  The rotation mechanism 3 may be installed horizontally with respect to the surface of the steel plate S to be measured. Further, it is preferable that the rotation mechanism section 3 be provided so as to be out of the optical path of the laser light source of the shape measuring device 15 (not to overlap the optical path). Thereby, it is possible to prevent the scanning range of the shape measuring device from being narrowed, and to perform the measurement without restricting the position where the steel sheet S is placed.

  The supporting beam 4 supports the rotating mechanism 3. The supporting beam 4 is disposed above the position of the center of gravity of the shape measuring device 15, and is connected to the measuring device fixing portion 2 via the rotation mechanism 3.

  The gravity compensating section 5 compensates for the load applied to the supporting beam section 4 by the weight of the shape measuring device 15. As the gravity compensating unit 5, for example, any one of an elastic member such as a constant load spring, a counterweight using a pulley and a weight, and lifting by a motor can be used.

  The gravity compensation jig 1 having the above-described configuration is fixed by sandwiching the main body (housing) of the shape measuring device 15 with the measuring device fixing portion 2, and rotating so that the measuring device fixing portion 2 and the shape measuring device 15 can be synchronized. The mechanism 3 (for example, a bearing) is connected. At this time, the bearing 3 is connected to the supporting beam 4 extending above the center of gravity of the shape measuring device 15 separately from the measuring device fixing portion 2. The support beam 4 and the gantry 22 to which the shape measuring device 15 is attached are connected by a gravity compensating unit 5 (for example, a constant load spring), so that the load applied to the rotating shaft of the turntable 20 by the weight of the shape measuring device 15 is reduced. Can be reduced.

  Although FIG. 3 shows a case where a constant load spring is used as the gravity compensation unit 5 that connects the gravity compensation jig 1 and the gantry 22 to which the shape measuring device 15 is attached, the present invention is applied to this embodiment. The mechanism is not limited, and any mechanism that can compensate for gravity may be used. For example, instead of using a constant load spring, a connection may be made by using a motor as shown in FIG. 4, or a connection may be made using a pulley and a weight as shown in FIG. The thick arrows shown in FIGS. 3 to 5 indicate the force for canceling the moment due to the weight of the shape measuring device.

  Next, the shape correcting device for a steel sheet according to the present invention will be described.

  INDUSTRIAL APPLICATION This invention is applicable to the shape correction apparatus which corrects the shape of a steel plate in a steel mill etc. As described above, since the shape correcting device 10 has been described with reference to FIGS. 1 and 2, the detailed description is omitted here.

  The steel sheet shape correcting device 10 of the present invention includes a shape measuring device 15 provided with the gravity compensation jig 1 described above, and corrects a shape defect generated in a steel plate after a rolling process. The shape correction device 10 only needs to include any one of the gravity compensation jigs 1 having the above-described configurations in FIGS. 3 to 5 in the shape measurement device 15 provided on the side of the entrance-side transfer table 13. Thereby, the gravitational moment applied to the rotation axis of the shape measuring device 15 can be reduced.

  The shape correcting apparatus 10 for a steel sheet of the present invention scans the steel sheet S on the entry-side transfer table 13 and measures the shape of the steel sheet S after the rolling process by, for example, the shape measuring apparatus 15 to which the gravity compensation jig 1 is attached. . When it is necessary to remove shape defects such as warpage of the steel sheet based on the measured shape of the steel sheet S, the steel sheet S is pressed from above by the pressing ram 12 of the press machine 11 to apply a bending moment to the steel sheet S. To correct the shape of the steel plate.

  As described above, according to the present invention, the self-weight of the shape measuring device 15 is compensated for by the gravity compensation jig 1 so that the rotation axis of the turntable 20 of the shape measuring device 15 is level with the surface of the steel plate S to be measured. The load on the rotating shaft, which is generated when the rotary shaft is installed, is reduced. This makes it possible to reduce the risk of rotational operation failure.

  In addition, the weight compensation jig 1 of the present invention uses the laser light source 19 to measure the shape of the steel plate shape measuring device 15 with good measurement accuracy, that is, the shape measurement when the surface of the steel plate and the rotation axis of the measuring device are horizontally set. Compensating for the gravity of the device 15 reduces the risk of rotational failure. Thereby, since the rotation speed is stabilized, the measurement accuracy of the shape measuring device 15 is improved.

  Furthermore, by applying the shape measuring device 15 provided with the gravity compensation jig 1 of the present invention to the steel plate shape correcting device 10 for correcting the shape of the steel plate, the steel plate can be corrected based on an appropriate steel plate shape. Becomes Thereby, the correction effect is also improved.

  Hereinafter, the present invention will be described based on examples. Note that the present invention is not limited to the following embodiments.

  In the present example, shape measurement and shape correction were performed using a steel sheet S after a rolling process, which was rolled by a known method, at a press straightening facility of an ironworks.

  As an example of the present invention, the shape measurement and the shape correction of the steel sheet S were performed using the shape correction device 10 including the shape measurement device 15 to which the gravity compensation jig 1 of FIG. In addition, as shown in FIG. 2, the shape measuring device 15 was installed so as to be placed horizontally on the gantry 22.

  On the other hand, as a conventional example (comparative example), shape measurement and shape correction of the steel sheet S were performed using the shape correction device 10 provided with the shape measurement device 15. In the conventional example, these operations were performed without using the gravity compensation jig 1 of the present invention. Note that the shape measuring device 15 was installed so as to be placed horizontally on the gantry 22.

  Here, it was examined whether or not a turning abnormality occurred in each shape measuring device 15. FIG. 6 shows the result. FIG. 6A is a graph showing a state of the turning angle control when the shape is measured without using the gravity compensation jig 1 (in the case of the conventional example), and FIG. 7 is a graph showing a state of turning angle control when shape measurement is performed using (a case of the present invention). In FIG. 6, the horizontal axis is a data collection point (unit: point), and the vertical axis is a turning angle (unit: rad) for each number of collection points.

  As shown in FIG. 6, in the example of the present invention (see FIG. 6B), no turning angle control abnormality occurred, whereas in the case of the conventional example (see FIG. 6A). Has a turning angle control abnormality. In the example shown in FIG. 6A, a measurement abnormality and a control abnormality occur particularly when the data collection point is between 0 and 400. This is because the thrust force and the moment acted on the turning axis due to the weight of the shape measuring device 15. In addition, it turned out that it operates within a certain range while including a certain error in a normal state.

  As described above, according to the present invention, by providing a steel sheet shape measuring apparatus using a laser light source with a gravity compensation jig, the steel sheet measuring apparatus using a laser light source can be installed with good measurement accuracy (the steel sheet surface and the measuring apparatus). (The rotation axis of the measurement device is horizontal). As a result, it has been found that the risk of rotational operation failure can be reduced.

DESCRIPTION OF SYMBOLS 1 Gravity compensation jig 2 Measurement device fixing part 3 Rotation mechanism part 4 Support beam part 5 Gravity compensation part 10 Shape correction device 11 Press machine 12 Pressurization ram 13 Incoming side transport table 14 Outgoing side transport table 15 Shape measuring device 16 Control device 17 , 18 Tracking device 19 Laser light source 20 Turntable 21 Galvanometer mirror 22 Mount S Steel plate

Claims (5)

A gravity compensation jig used for a steel sheet shape measuring device provided with a laser light source,
A measuring device fixing section for fixing the shape measuring device,
A rotation mechanism unit that rotates the measurement device fixing unit in the rotation direction of the shape measurement device,
A support beam for supporting the rotation mechanism,
A gravity compensating part for compensating a load applied to the supporting beam part by a weight of the shape measuring device.   The jig according to claim 1, wherein the rotation mechanism is installed horizontally with respect to the surface of the steel plate to be measured.   The gravity compensating jig according to claim 1, wherein the rotation mechanism is provided so as not to block an optical path of the laser light source.   The gravity compensation jig according to any one of claims 1 to 3, wherein the gravity compensation unit is one of an elastic member and a counterweight.   A shape correcting device for a steel sheet, comprising a shape measuring device provided with the gravity compensation jig according to claim 1.