JP3592964B2 - Metal plate connection device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate connecting apparatus for connecting metal plates to each other by abutting or overlapping metal plates and then performing welding by laser beam welding, arc welding, flash welding, electron beam welding, seam welding, or the like. is there.
[0002]
[Prior art]
Generally, in this type of metal plate connecting apparatus, it is necessary to accurately, quickly, automatically, and surely align a center line of a pair of metal plates in a width direction with a small width deviation.
[0003]
Conventionally, various devices have been devised in order to perform a desired metal plate connection, and these are disclosed in Japanese Patent Application Laid-Open No. 61-132269, which describes a centering device for a passing material. FIG. 23 shows a typical example of a conventional steel process line. The metal plate wound in the coil shape in this line passes through a process line processing zone 73 such as a galvanizing tank via a welding machine 71 and a looper device 72, and is galvanized, for example. Since one metal plate serving as a coil has a finite length, the tail end of the preceding metal plate 2 and the front end of the following metal plate 1 are connected by a welding machine 71. The looper device 72 stores the metal plates 1 and 2 during welding connection, and is configured to continuously flow through the processing zone 73 even during welding.
[0004]
The positional relationship between the tail end of the preceding metal plate 2 and the front end of the following metal plate 1 is as shown in FIG. 21, and a center shift in the plate width direction often occurs. In addition, as shown in FIG. 22, the center lines are not parallel but have an angle with each other, and are often displaced in a V shape. When the preceding metal plate 2 and the following metal plate 1 are welded in such a state of the center deviation, the yield of the metal plate product is deteriorated and a problem arises in the joint strength of the connection part.
[0005]
FIG. 18 shows a method of centering a metal plate used in a conventional metal plate connection device. That is, the centering of the metal plate is performed by pressing the side guide pads 43, 45, 47, 49 against the preceding metal plate 2 and the following metal plate 1 by the respective cylinders 44, 45, 48, 50 to move the metal plate. Center adjustment.
[0006]
In FIG. 19, the photosensors 57 and 58 are moved to detect the side edge positions of the metal plate, and the shift amount is calculated to move the metal plate. That is, the photon sensors 57 and 58 are moved forward and backward by the rack and pinion 55 and the sensor driving motor 54 to detect the side edges of the leading metal plate 2 and the trailing metal plate 1, and to detect the photon sensors 61 and 62. Is moved forward and backward by the rack and pinion 60 and the sensor driving motor 59 to detect the side edges of the leading metal plate 2 and the trailing metal plate 1 and calculate the amount of center deviation thereof to calculate the driving motor 53 and the ball screw. 52, the entrance-side clamp device 101 is operated via the entrance-side clamp connection bar 51 to perform centering.
[0007]
In the conventional centering devices shown in FIGS. 20 and 21, the positions where the light from the fluorescent lamps 64 and 66 are received by the photosensors 63 and 65 are optically recognized as the positions of the side edges of the metal plate. The shift amounts of the lines are calculated by the controller 70 to calculate the shift amounts e ₁ and e ₂ of the center lines. The control amounts corresponding to the shift amounts e ₁ and e ₂ calculated in this way are given to the hydraulic control valve 69, and the hydraulic pressure supplied from the hydraulic source 68 is supplied to the cross adjustment cylinder 67, and the following metal plate is The entry-side clamp device 101 gripping 1 moves to perform center alignment.
[0008]
[Problems to be solved by the invention]
The conventional metal plate centering apparatus as described above has the following disadvantages.
In the conventional method shown in FIG. 18, since the side edge of the metal plate is directly mechanically pushed and moved, in the case of a thin plate, a waist break (buckling) phenomenon occurs and the center cannot be aligned. In addition, since the device using such a mechanical side guide is large in configuration and cannot be stored between the entrance-side clamping device and the exit-side clamping device, it is provided at a position away from the end of the metal plate. In the case where the metal plates are butted at an angle as shown in FIG. 22 to form a V-shape, a width shift error may occur near the butted end even if there is no shift at the measurement position. There is.
[0009]
In the method of FIG. 19, the photosensor is moved when detecting the end of the metal plate 1 or 2, so that it takes a long time to complete the detection of the plate edge. This shortcoming is significant even in a steel processing line, since a short time from the centering of a metal plate to the completion of welding is an absolute requirement.
[0010]
In the methods shown in FIGS. 20 and 21, the photosensor for detecting the amount of displacement between the preceding metal plate 2 and the following metal plate 1 is disposed outside the entrance-side clamp device and the exit-side clamp device. This is because it was difficult to install between the entrance-side clamp device and the exit-side clamp device, especially when the mechanical configuration and the positional relationship of the scanning mechanism of the photosensor and the like were taken into consideration. Therefore, since the measurement of the side edge is performed at a position away from the welding position, when the metal plate has a camber, the metal plate is bent in the line direction, including the case where the metal plate is bent in the line direction Cannot correct the center shift amount accurately.
[0011]
The present invention has been made in order to solve such problems of the conventional apparatus, and an object of the present invention is to provide a high-quality joint in a short time and stably without a displacement in a plate width direction at a welded portion. The object is to obtain a compact metal plate connection device that can be performed.
[0012]
[Means for Solving the Problems]
According to the present invention, a centering device that aligns the centers of the two metal plates in the width direction with each other, a shear device that cuts the ends of the centered metal plates, and an edge cut by the shear device are attached to each other. A metal plate connection device provided with a welding device to be joined, wherein the centering device has a pair of clamp devices having an input side clamp device and an output side clamp device for gripping and holding a preceding metal plate and a following metal plate, respectively. And an image sensor provided in the shearing device for detecting a position of a side edge near an end of the two metal plates, and calculates a center line shift between the preceding metal plate and the following metal plate based on the detected information. And moving at least one of the input-side clamp device and the output-side clamp device together with the metal plate on the basis of the calculated center line deviation, so that the centers of the metal plates coincide with each other. Metal plate coupling device is provided comprising a drive device for.
[0013]
Further, the image sensor may be provided on the upper shear of the shear device at a position corresponding to each side edge near the end of the metal plate.
[0014]
Further, the image sensor can be provided corresponding to various different positions on the side edge of the metal plate which is assumed to be supplied.
[0015]
Further, by moving the outgoing clamp device holding the preceding metal plate to match the center positions of both metal plates, or by moving the incoming clamp device holding the succeeding metal plate to move both the metal plates, The center position can be matched.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this description, the same or corresponding parts as those in the related art are denoted by the same reference numerals.
[0017]
1 to 10 show a metal plate connection device according to Embodiment 1 of the present invention. First, the overall configuration will be described with reference to FIGS. FIG. 1 is a front view showing the entire configuration, and FIG. 2 is a side view thereof. The metal plate connecting device includes a common base 3 that supports the entire device. On the common base 3, an outgoing-side clamp device 102 for gripping the preceding metal plate 2 and an incoming-side clamp device 101 for gripping the following metal plate 1 are mounted, and can be moved on the common base 3. A carriage 4 is provided, and a guillotine shear device 103 and a seam welding device 104 are mounted on the carriage 4 and can move on the common base 3.
[0018]
A cross-adjustment guide 79 and a cross-adjustment cylinder 67 of the entry-side clamp device are mounted on the base 3, and the entry-side clamp moving cylinder 19 and the entry-side clamp 5 are mounted thereon. The entry side clamp 5 grips the following metal plate 1 by the entry side clamp lifting cylinder 18. The delivery side clamp 6 holds the preceding metal plate 2 by the delivery side clamp lifting / lowering cylinder 20. In this exit clamp device 102, the exit clamp 6 is tilted by the exit clamp tilt cylinder 21 with the exit clamp tilt shaft 27 as a fulcrum while the preceding metal plate 2 is gripped. On the other hand, the carriage 4 is supported via a carriage movement guide 7 installed on the common base 3. The carriage 4 is moved by a ball screw 8 and a carriage driving motor 9. Then, a lower shear 11 and an upper shear 10 are attached.
[0019]
The lower shear 11 is raised and lowered by a lower shear lifting / lowering cylinder 13 with a lower shear lifting / lowering guide 12 serving as a guide. On the other hand, the upper shear 10 is raised and lowered by the upper shear lifting / lowering cylinder 15 with the upper shear lifting / lowering guide 14 as a guide. The carriage 4 is also provided with a welding device 104. That is, the lower seam electrode 22 and the upper seam electrode 23 are respectively attached, and the upper seam electrode 23 is configured to be moved up and down by the upper seam electrode elevating cylinder 25 with the upper seam electrode elevating guide 24 serving as a guide.
[0020]
CCD cameras (image sensors) 16 and 17 are attached to the upper shear 10. 3 and 4 are views for explaining the positional relationship between the CCD cameras (image sensors) 16 and 17. FIG. 5 is a diagram for explaining the function of the CCD camera (image sensor). Numeral 74 (75) indicates the field of view of the CCD cameras (image sensors) 16 and 17, information detected by the CCD cameras (image sensors) is processed by the controller 76, and the signal is given to the hydraulic control valve 77 and sent from the hydraulic source 68. The subsequent metal plate 1 that is supplied to the cross-adjustment cylinder 67 via the hydraulic control valve 77 and is gripped by the entry-side clamp device 101 moves.
[0021]
FIG. 6 shows the positional relationship between the preceding metal plate 2 and the following metal plate 1 and the CCD cameras (image sensors) 16 and 17. The guillotine shear device 103 before cutting the metal plates 1 and 2, and the entrance-side clamp device 101. , The positional relationship of the output side clamp device 102 is shown. FIG. 7 is an explanatory view of the operation when the preceding metal plate 2 and the following metal plate 1 are cut. First, the lower shear 11 is raised, and then a cutting step is performed.
[0022]
FIG. 8 is a diagram showing a state in which the leading metal plate 2 is tilted after cutting the metal plates 1 and 2, and FIG. 9 is a diagram in which the entrance-side clamp device 101 is indexed in the state shown in FIG. FIG. 10 is a diagram showing a state in which the tail end of the preceding metal plate 2 and the front end of the following metal plate 1 are overlapped, and then seam welding is performed by the seam welding electrodes 22 and 23.
[0023]
Next, the operation will be described. As shown in FIG. 1, when the tail end of the preceding metal plate 2 and the tip of the following metal plate 1 enter the guillotine shear device 103, the two metal plates are gripped by the outgoing clamp device 6 and the incoming clamp device 5. You. Thereafter, as shown in FIG. 5, the Y direction of the metal plates 1 and 2 is scanned by the image sensors 16 and 17 which are CCD cameras, and the center position shift of the preceding metal plate 2 and the following metal plate 1 in the width direction is performed. Is detected. It should be noted that, by scanning the image sensor in the Y-axis direction and detecting the first plate edge to obtain coordinates, whether to detect a plate edge in a direction in which the shading is lighter or to detect a plate edge in a darker direction is determined. The selection is made according to the surface condition of the metal plate, the surrounding brightness, and the like. There are two methods for aligning the center line of the preceding metal plate and the center line of the following metal plate. There are absolute positioning and relative positioning. Absolute position detection is performed by detecting the position of the side edge with respect to a certain reference position. Although it is more preferable, the same effect can be obtained by relative positioning.
[0024]
After the detection, the succeeding metal plate 1 is moved, the center of the width is adjusted (cross-adjustment), and both the metal plates 1 and 2 are cut by the guillotine shear device 103. (Cross adjustment may be performed after cutting the guillotine shears.) In addition, the center alignment of both metal plates may be performed by moving the output side clamping device that grips the preceding metal plate, or may be performed by the subsequent metal plate. It may be carried out by moving the entry-side clamp device which has gripped. Then, as shown in FIG. 8, the outgoing side clamping device 102 is tilted to advance (index) the entering side clamping device 101 as shown in FIG. 9, and the tail end of the preceding metal plate 2 and the following metal plate 1 are moved. Lay the tips. In the state shown in FIG. 10, welding is performed while moving the carriage 4 to the left as shown in FIG. Naturally, at this time, the upper seam electrode 23 is lowered. It goes without saying that the end faces of the metal plates are butted together except for seam welding. FIG. 11 shows a laser beam metal plate connecting device. Also, when the image sensor recognizes an object, if the object to be detected and the object (including space) below the object have the same color, there is a possibility of erroneous recognition. In this case, the object is clearly recognized. Therefore, if an object of a color different from the object to be detected is provided below, it is needless to say that more stable and accurate detection can be performed.
[0025]
Embodiment 2 FIG.
FIGS. 12 and 13 show another embodiment of the centering device applicable to the metal plate connecting device of the present invention, and image sensors 16, 17, 30, 31 which are CCD cameras provided on the upper shear 10. Are arranged in the width direction of the metal plate. According to such a configuration, the area covered by each of the image sensors 16, 17, 30, and 31 can be small. Therefore, even when the widths of the metal plates are greatly different or the displacement of the metal plates is extremely large, Side edges can be detected quickly and reliably.
[0026]
As the welding device for the metal plate connecting device of the present invention, various known suitable welding devices can be used or can be modified. For example, FIG. 14 shows a method of crushing the welded portion by performing swaging after seam welding, and guiding the upper swaging roll elevating guide 34 with respect to the lower swaging roll 32, and The upper swaging roll 33 is lowered to press the weld. FIG. 15 shows a laser beam metal plate connecting device using a laser beam welding device. A laser beam emitted from a laser oscillator 36 is bent by a bend mirror 37 and focused on a laser processing head 29 to perform laser beam welding. Reference numeral 39 denotes a lifting cylinder of the laser processing head. FIG. 16 shows an example in which the laser oscillator 36 is arranged other than the carriage 4. FIG. 17 shows an arc welding apparatus which is supplied from a welding power source 41 to a welding torch 42. As arc welding, MIG welding, TIG welding, plasma arc welding, or the like can be used. Although not shown, the same effect can be obtained by using a method in which the tail end of the preceding metal plate 2 and the front end of the following metal plate 1 are abutted and a flash current is applied between the two metal plates to perform flash welding. Is obtained. Also, welding can be performed using an electron beam welding device.
[0027]
【The invention's effect】
As described above, the metal plate connecting device of the present invention is provided in the centering device that aligns the centers of the two metal plates in the width direction, and detects the position of the side edge near the end of both metal plates. The image sensor is mounted on the shearing device and is located near the edge of the metal plate to be welded, so that the amount of displacement can be detected instantaneously and the processing time (downtime) is reduced. And non-contact detection, so that the edge of the plate does not bend even if it is a thin plate, and there is no shift in the width direction of the plate at the welded part. It can be performed stably and the metal plate connecting device can be made compact.
[0028]
Further, since the image sensor is provided on the upper shear of the shear device at a position corresponding to each side edge near the end of the metal plate, both side edges of the metal plate can be simultaneously detected.
[0029]
In addition, since the image sensors are provided corresponding to various different positions on the side edges of the metal plate that is assumed to be supplied, even if the change in the width of the metal plate is large or abrupt, it is quick. Can respond to.
[0030]
In addition, the clamp device that moves the outgoing or incoming clamp device that holds the preceding metal plate and moves it to match the center positions of both metal plates may be either the outgoing clamp device or the incoming clamp device.
[Brief description of the drawings]
FIG. 1 is a front view of a metal plate connection device of the present invention.
FIG. 2 is a side view of the metal plate connection device of the present invention.
FIG. 3 is a schematic front view showing the operation principle of the metal plate connection device of the present invention.
FIG. 4 is a schematic side view showing the operation principle of the metal plate connection device of the present invention.
FIG. 5 is a configuration diagram of a metal plate centering system of the present invention.
FIG. 6 is a view showing a side edge position detecting step of the metal plate for centering.
FIG. 7 is a view showing a step of cutting a metal plate.
FIG. 8 is a diagram showing a preparation process for overlapping metal plates.
FIG. 9 is a diagram showing a state in which metal plates are overlaid.
FIG. 10 is a diagram showing seam welding of superposed metal plates.
FIG. 11 is a diagram showing laser beam welding of butted metal plates.
FIG. 12 is a front view in which a plurality of image sensors are arranged in a shear device.
FIG. 13 is a side view in which a plurality of image sensors are arranged in a shear device.
FIG. 14 is a side view showing a seam welding apparatus with a swaging roll according to the present invention.
FIG. 15 is a side view showing the laser beam metal plate connecting device of the present invention.
FIG. 16 is a side view showing a modification of the metal plate connection device of FIG.
FIG. 17 is a side view showing an arc welding metal plate connecting apparatus according to the present invention.
FIG. 18 is an explanatory diagram of a plate centering device of a conventional metal plate connecting device.
FIG. 19 is an explanatory view of a plate centering device of another conventional metal plate connecting device.
FIG. 20 is a schematic front view showing a plate centering device used in a conventional metal plate connecting device.
FIG. 21 is a schematic plan view of the plate centering device of FIG. 20;
FIG. 22 is an explanatory diagram showing a relationship between metal plates whose center lines have an angle.
FIG. 23 is a schematic view showing a typical example of a steel process line.
[Explanation of symbols]
1 trailing metal plate, 2 preceding metal plate, 3 base, 4 carriage, 5 entrance clamp, 6 exit clamp, 10 upper shear, 11 lower shear, 16, 17 image sensor (CCD camera), 76 arithmetic unit, 103 Shear device, 104
Welding equipment.

Claims (5)

A centering device that aligns the centers of the two metal plates in the width direction with each other, a shear device that cuts the ends of the centered metal plates, and a welding device that joins the edges cut by the shear device to each other. In the provided metal plate connection device,
The centering device is a pair of clamp devices having an input-side clamp device and an output-side clamp device for gripping a preceding metal plate and a subsequent metal plate, respectively, and near the ends of the two metal plates provided in the shear device. An image sensor for detecting the position of the side edge of the metal plate, a calculating device for calculating the center line deviation between the preceding metal plate and the following metal plate based on the detected information, and the input device based on the calculated center line deviation. A metal plate connection device, comprising: a driving device that moves at least one of the side clamp device and the output side clamp device together with the metal plate to match the centers of the metal plates. The metal plate connection device according to claim 1, wherein the image sensor is provided on an upper shear of the shear device at a position corresponding to each side edge near an end of the metal plate. 3. The metal plate connecting device according to claim 2, wherein the image sensors are provided corresponding to various different positions on a side edge of the metal plate assumed to be supplied. The metal plate connecting device according to any one of claims 1 to 3, wherein the output side clamping device that grips the preceding metal plate is moved to match the center positions of both metal plates. The metal plate connecting device according to any one of claims 1 to 3, wherein the entrance-side clamp device gripping the subsequent metal plate is moved to match the center positions of both metal plates.

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