JP2013237057A - Laser beam welding device and method for cutting metal plate with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laser beam welding device having a double cutting shear, which can restrain displacement of outlet and inlet side clamps and a lower cutting unit to improve cutting accuracy and welding quality of a metal plate.SOLUTION: A laser beam welding device includes an outlet side fixing means (first outlet side pad 21 and second outlet side pad 23) arranged between an outlet side clamp support frame 15 and a lower cutting unit 6 as a cutting-time displacement control mechanism, and an inlet side fixing means (first inlet side pad 22 and second inlet side pad 24) arranged between an inlet side clamp support frame 17 and the lower cutting unit 6. Thus, when cutting the metal plates 1, 2 with a cutting mechanism having the double cutting shear, the displacement of the outlet side clamp support frame 15, the lower cutting unit 6, and the inlet side clamp support frame 17 can be restrained, and the metal plates can be cut while the mutual positional relationship is kept at a fixed state.

Description

  The present invention relates to a laser beam welding apparatus that welds a cut end face of a preceding metal plate and a succeeding metal plate to face each other and a method for cutting the metal plate in the laser beam welding apparatus.

  In the conventional laser beam welding apparatus, as shown in Patent Document 1, the preceding metal plate and the trailing metal plate, which are materials to be welded, are clamped by the output side clamp and the input side clamp, respectively. There is a technique in which after cutting an end portion with a double cut shear (guillotine shear), the cut end faces are brought into contact with each other and welded with a laser beam.

  Further, Patent Document 2 adopts a “rotary guide means that adopts a rotary shear as a cutting method and mechanically couples the rotary shear and the outlet side and inlet side clamps at the time of cutting, thereby constraining the positional relationship to each other. ", And a laser beam welding apparatus that improves the quality of the butted portions of both metal plates is proposed.

  The “rolling guide means” disclosed in Patent Document 2 includes an exit side guide roller and an entrance side guide roller attached to the rotary shear frame, and an exit side guide guide rail attached to the exit side and the entrance side clamp, respectively. It is composed of side guide guide rails. At the time of cutting, the exit side guide roller is restrained by the exit side guide guide rail, and the entrance side guide roller is restrained by the entrance side guide guide rail.

Japanese Patent Laid-Open No. 58-119483 Japanese Patent Publication No. 7-63860

  In order to obtain high welding quality in the laser beam welding apparatus as described above, it is important that the cutting linearity is high and the butt gap value is small. However, in the conventional laser beam welding apparatus presented in Patent Document 1, the outgoing and incoming side clamps and the double cut shear are mechanically independent mechanisms. For this reason, when the metal plate is cut, the cutting reaction force causes, for example, the inclination of the output side and the input side clamp and the play in the input side or the output side by the lifting mechanism of the lower shear, and high cutting accuracy cannot be obtained. .

  Therefore, the linearity of cutting is low, the butt gap value between the preceding metal plate and the succeeding metal plate varies, and there may be a portion that does not come into contact at the time of matching. In addition, the position of the exit side cutting line serving as a butt reference may vary in the entrance side or exit side direction. For these reasons, the conventional laser beam welding apparatus has a problem that high welding quality cannot be obtained.

  In Patent Document 2, the rotary shear and the output side and input side clamps are mechanically coupled at the time of cutting so as to restrain the mutual positional relationship constant, but guide them as the cutting progresses while they are constrained. Since the guide rail is moved, it is difficult to obtain sufficient mechanical rigidity. In addition, the rotary shear has the disadvantages that the cutting accuracy is inferior to that of the double cut shear and that the machine operation time is longer than that of the double cut shear, and as a result, the double cut shear method is overwhelmingly adopted.

  The present invention has been made to solve the above problems, and in a laser beam welding apparatus employing a double cut shear, the displacement of the output side and input side clamps and the lower cutting device is suppressed, and the metal plate The purpose is to improve the cutting accuracy and improve the welding quality.

  In addition, in a laser beam welding apparatus employing a double cut shear, a metal plate cutting method capable of suppressing the displacement of the exit side and entry side clamps and the lower cutting device and improving the cutting accuracy of the metal plate is provided. For the purpose.

  The laser beam welding apparatus according to the present invention comprises a conveying means for horizontally moving a metal plate having a predetermined width dimension in a direction orthogonal to the width direction, an output side clamp for restraining and holding the preceding metal plate, and an output for supporting the same. A side clamp support means, an input side clamp for restraining and holding a trailing metal plate, an input side clamp support means for supporting the clamp, and a lower cutting means and an upper cutting means provided to be movable up and down, respectively, and an output side clamp Cutting means for simultaneously cutting the rear end portion of the preceding metal plate constrained and held by the front end and the front end portion of the succeeding metal plate constrained and held by the entry side clamp in a direction parallel to the width direction of the metal plate; Laser irradiation means for irradiating a laser along the abutting portion of the cut end face of the metal plate and the succeeding metal plate; and an index mechanism moving means for horizontally moving the inlet-side clamp support means back and forth with respect to the moving direction of the metal plate; An output side fixing means disposed between the output side clamp support means and the lower cutting means and fixing the positional relationship between the output side clamp support means and the lower cutting means when the lower cutting means is raised to the rising end; and an input side clamp It is disposed between the support means and the lower cutting means, and when the lower cutting means is raised to the rising end and the entrance clamp support means is advanced horizontally by the index mechanism moving means, the entrance clamp support means and the lower cutting means An inlet side fixing means for fixing the positional relationship is provided. During the cutting operation by the cutting means, the lower cutting means is raised to the rising end, and then the inlet side clamp support means is continuously moved forward horizontally by the index mechanism moving means, and then exited. Cutting is performed with the positional relationship between the side clamp support means, the lower cutting means, and the entry side clamp support means fixed.

  Further, the cutting method of the metal plate in the laser beam welding apparatus according to the present invention includes a conveying means for horizontally moving a metal plate having a predetermined width dimension in a direction orthogonal to the width direction, and an output for restraining and holding the preceding metal plate. Side clamp and an output side clamp support means for supporting the same, an input side clamp for restraining and holding the succeeding metal plate, and an input side clamp support means for supporting the clamp, and an upper cutting means and a lower cutting provided to be movable up and down, respectively. Cutting means having means, laser irradiation means for irradiating laser along the abutting portion of the cutting end faces of the preceding metal plate and the succeeding metal plate, and the entrance side clamp support means horizontally in the front-rear direction with respect to the moving direction of the metal plate A method of cutting a metal plate in a laser beam welding apparatus provided with an index mechanism moving means for moving, a preceding metal plate conveyed by a conveying means and stopped at a fixed position, and a rear metal plate The first step of restraining and holding the metal plate by the output side clamp and the input side clamp, respectively. Following the first step, the lower cutting means is raised to the rising end, and the first step provided in the lower cutting means Following the second step in which the output side pad and the second output side pad provided on the output side clamp support means abut, and the second step, the input side clamp support means is leveled by the index mechanism moving means. Following the third step, the third step of advancing and bringing the second entry pad provided on the entry clamp support means into contact with the first entry pad provided on the lower cutting means, With the index mechanism moving means, the entry side clamp support means continues to advance horizontally, and the upper side cut with the positional relationship between the exit side clamp support means, the lower cutting means, and the entry side clamp support means fixed. Lowering the stage, which is the tip portion of the rear end portion and the trailing metal plate prior metal plate intended to include a fourth step, to simultaneously cut in a width direction parallel to the direction of the metal plate.

  According to the laser beam welding apparatus according to the present invention, the exit side fixing means disposed between the exit side clamp support means and the lower cutting means, and the entry side disposed between the entrance side clamp support means and the lower cutting means. By providing the fixing means, during the cutting operation by the cutting means, it is possible to suppress the displacement of the output side clamp support means, the lower cutting means, and the input side clamp support means, and the cutting is performed with the mutual positional relationship fixed. be able to. Thereby, since a cutting precision improves and the linearity of the cutting end surface of a metal plate improves, a welding precision also improves and welding quality improves.

  Further, according to the method for cutting a metal plate in the laser beam welding apparatus according to the present invention, in the fourth step, the input side clamp support means is continuously advanced horizontally by the index mechanism moving means, the output side clamp support means, Since the upper cutting means is lowered in a state where the positional relationship between the lower cutting means and the entry side clamp support means is fixed, the rear end portion of the preceding metal plate and the front end portion of the subsequent metal plate are cut. Cutting accuracy is improved.

It is a perspective view which shows the laser beam welding apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the state before the cutting | disconnection of the metal plate in the laser beam welding apparatus which concerns on Embodiment 1 of this invention, and after a cutting | disconnection. It is a figure which shows the state which the metal plate stopped in the cutting mechanism of the laser beam welding apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the state by which the metal plate was clamped in the cutting mechanism of the laser beam welding apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows operation | movement of the guide roller of the laser beam welding apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the flow of the cutting operation and welding operation of the laser beam welding apparatus which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
Hereinafter, a laser beam welding apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 shows the appearance of the laser beam welding apparatus according to the first embodiment. The laser beam welding apparatus simultaneously cuts the rear end portion of the preceding metal plate 1 and the front end portion of the succeeding metal plate 2 by a cutting mechanism (cutting means) employing a double cut shear, and then at the abutting portion of these cut end surfaces. A laser beam is irradiated along and welded. Thereby, processing, such as acid washing, rolling, heat treatment, and plating treatment, can be continuously performed on the metal plate in a subsequent process.

  The metal plates 1 and 2 which are materials to be welded have a predetermined width dimension, and are moved horizontally in a direction (indicated by an arrow A in the figure) perpendicular to the width direction by a conveying means (not shown). Is done. In a general steel process line, the metal plate is a coiled steel plate having a thickness dimension of 0.2 mm to 6.6 mm and a width dimension of about 600 mm to 1900 mm.

  FIGS. 2A and 2B are diagrams for explaining the state before and after the cutting of the metal plates 1 and 2, wherein FIG. 2A shows a state before cutting, and FIG. 2B shows a state where the cut end faces are butted after cutting. . In FIG. 2, W represents the width dimension of the metal plate. As shown in FIG. 2A, the rear end 1a of the preceding metal plate 1 before cutting and the front end 2a of the subsequent metal plate 2 have low end face linearity.

  On the other hand, after cutting with the cutting lines 1b and 2b by the cutting mechanism of the laser beam welding apparatus, as shown in FIG. 2 (b), the linearity of the cut end surface becomes high, the butt gap value is small, and the variation is small. It becomes. Therefore, stable welding can be performed by irradiating the laser along the abutting portion of these cut end faces.

  The configuration of the laser beam welding apparatus according to the first embodiment will be described with reference to FIGS. FIG. 3 shows a state in which the metal plate is stopped in the cutting mechanism (before clamping), and FIG. 4 shows a state in which the metal plate is clamped in the cutting mechanism. The output side clamp 3 that restrains and holds the preceding metal plate 1 during the cutting operation (and during welding) includes an output side upper clamp 31 and an output side lower clamp 32. The output side clamp 3 is supported by the output side clamp support frame 15 which is an output side clamp support means, and is fixed to the common base 16.

  The entry side clamp 4 that restrains and holds the trailing metal plate 2 during the cutting operation (and during welding) includes an entry side upper clamp 41 and an entry side lower clamp 42. The entry side clamp 4 is supported by an entry side clamp support frame 17 which is an entry side clamp support means, and is mounted on an index mechanism.

  In the first embodiment, the index mechanism includes an index mechanism moving cylinder 18 that is an index mechanism moving means, an index mechanism frame 19, and an index mechanism stopper 20. The index mechanism moving cylinder 18 horizontally moves the entry side clamp support frame 17 forward and backward with respect to the moving direction of the metal plates 1 and 2. Prior to the cutting operation, as shown in FIG. 3, the entry side clamp support frame 17 is positioned at the retracted end and is stopped in contact with the index mechanism stopper 20.

  The cutting mechanism of the laser beam welding apparatus has a lower cutting device 6 that is a lower cutting means and an upper cutting device 7 that is an upper cutting means, which are moved up and down by a lower cutting device lifting mechanism 13 and an upper cutting device lifting mechanism 14, respectively. It is provided as possible. When the cutting operation is not performed, the lower cutting device 6 stands by at the lowered position and the upper cutting device 7 stands by at the raised position. During the cutting operation, the upper cutting device 7 is lowered while the lower cutting device 6 is raised to the rising end, so that the rear end portion 1a of the preceding metal plate 1 and the front end portion 2a of the succeeding metal plate 2 are moved to the metal. Cut simultaneously in a direction parallel to the width direction of the plates 1 and 2.

  The lower cutting device 6 and the upper cutting device 7 are mounted on the carriage frame 5 as shown in FIG. The carriage frame 5 is mounted with a processing head 8 that irradiates a laser beam, an adjusting roller 9 that pressurizes the butted portion of the metal plate in the vertical direction before and after the welding point, and a swaging roller 10. The carriage frame 5 is provided so as to be movable in the welding direction of the metal plates 1 and 2 (indicated by an arrow B in FIG. 1) and in the opposite direction.

  A laser beam is supplied to the machining head 8 from a short wavelength solid laser oscillator 11 through a fiber cable 12. The processing head 8, the adjusting roller 9, and the swaging roller 10 are linearly arranged in the welding direction, that is, the width direction of the metal plates 1 and 2, and can be moved in the welding direction and the opposite direction by the movement of the carriage frame 5. is there.

  Further, the laser beam welding apparatus cuts to suppress displacement of the output side clamp 3, the lower cutting apparatus 6, and the input side clamp 4 during the cutting operation in order to improve the cutting accuracy of the metal plates 1 and 2 by the cutting mechanism. It is characterized by having a time displacement suppression mechanism. Below, this displacement control mechanism at the time of a cutting | disconnection is demonstrated.

  The cutting displacement suppression mechanism includes an output side fixing means and an input side fixing means. The exit-side fixing means is disposed between the exit-side clamp support frame 15 and the lower cutting device 6, and the positional relationship between the exit-side clamp support frame 15 and the lower cutting device 6 when the lower cutting device 6 is raised to the rising end. Is fixed. In the first embodiment, the exit-side fixing means includes a first exit-side pad 21 provided on the surface of the lower cutting device 6 that faces the exit-side clamp support frame 15, and the lower cut of the exit-side clamp support frame 15. It includes a second outlet pad 23 provided on the surface facing the device 6 and in contact with the first outlet pad 21.

  The entry side fixing means is disposed between the entry side clamp support frame 17 and the lower cutting device 6, raises the lower cut device to the rising end, and horizontally moves the entry side clamp support frame 17 by the index mechanism moving cylinder 18. When moved forward, the positional relationship between the entry side clamp support frame 17 and the lower cutting device 6 is fixed. In the first embodiment, the entry-side fixing means includes a first entry-side pad 22 provided on a surface of the lower cutting device 6 that faces the entry-side clamp support frame 17, and a lower cut of the entry-side clamp support frame 17. It includes a second entry pad 24 that is provided on the surface facing the device 6 and abuts against the first entry pad 22.

  At the time of the cutting operation, the lower cutting device 6 is raised to the rising end, and then the entry side clamp support frame 17 is continuously advanced horizontally by the index mechanism moving cylinder 18. As a result, the lower cutting device 6 is mechanically constrained via the output side clamp support frame 15 and the input side clamp support frame 17 via the output side fixing means and the input side fixing means, respectively, and the mutual positional relationship is fixed. .

  In the first embodiment, the first output side pad 21 and the second output side pad 23 are provided as the output side fixing means, and the first input side pad 22 and the second input side are provided as the input side fixing means. Although the example provided with the pad 24 was demonstrated, the structure of an exit side fixing means and an entrance side fixing means is not limited to this. For example, you may have any one of the 1st outgoing side pad 21 and the 2nd outgoing side pad 23 as an outgoing side fixing means. Similarly, it may have one of the first entry side pad 22 and the second entry side pad 24 as the entry side fixing means.

  The cutting displacement suppression mechanism in the first embodiment includes a guide roller 25 attached to the output side clamp support frame 15. 5A and 5B are views showing the operation of the guide roller, where FIG. 5A shows a state where the lower cutting device is in the middle of ascent, and FIG. 5B shows a state where the lower cutting device reaches the ascending end and stops.

  As shown in FIG. 5A, the guide roller 25 rotates while pushing the lower cutting device 6 in the direction of the inlet clamp support frame 17 as the guide roller cylinder 26 moves forward while the lower cutting device 6 is moving up. A gap of, for example, about 0.5 mm (within the allowable elastic strain value of the lower cutting device 6) is provided between the first outgoing pad 21 and the second outgoing pad 23 so as not to interfere with each other. Further, as shown in FIG. 5B, when the lower cutting device 6 reaches the rising end and stops, the guide roller 25 releases the pressure of the lower cutting device 6 by the retraction of the guide roller cylinder 26, and the first ejector is released. The side pads 21 and the second outlet pads 23 abut each other at the contact surface.

  Below, the cutting method of the metal plate in the laser beam welding apparatus according to the first embodiment will be briefly described (the following will be described in detail using the flowchart of FIG. 6). The method for cutting a metal plate in the laser beam welding apparatus according to Embodiment 1 includes the following four steps.

  First, the preceding metal plate 1 and the succeeding metal plate 2 which are conveyed by the conveying means and stopped at a fixed position are restrained and held by the output side clamp 3 and the input side clamp 4 respectively (first step). Subsequent to the first step, the lower cutting device 6 is raised to the rising end, and the first output pad 21 provided on the lower cutting device 6 and the second output provided on the output-side clamp support frame 15 are provided. The side pad 23 is brought into contact (second step).

  Following the second step, the entry-side clamp support frame 17 is advanced horizontally by the index mechanism moving cylinder 18, and the second entry-side pad 24 provided on the entry-side clamp support frame 17 is provided on the lower cutting device 6. The first entry side pad 22 is contacted (third step).

  Following the third step, the indexing mechanism moving cylinder 18 continues to move the entry-side clamp support frame 17 horizontally, so that the exit-side clamp support frame 15, the lower cutting device 6, and the entry-side clamp support frame 17 are mutually connected. In a state where the positional relationship is fixed, the upper cutting device 7 is lowered, and the rear end portion 1a of the preceding metal plate 1 and the front end portion 2a of the succeeding metal plate 2 are parallel to the width direction of the metal plates 1 and 2. (4th step).

  Next, the metal plate cutting method and welding method in the laser beam welding apparatus according to the first embodiment will be described in detail with reference to FIG. FIG. 6 is a flowchart showing the flow of the cutting operation and the welding operation of the laser beam welding apparatus according to the first embodiment, where S1, S2,... Indicate processing steps.

  When the steel process line in which the laser beam welding device is used decelerates from operation (through the plate), the carriage frame 5 waiting at the origin position shown in FIG. 1 moves in the direction opposite to the welding direction and cuts the lower part. A device 6 and an upper cutting device 7 are arranged between the output side clamp 3 and the input side clamp mechanism 4. When the rear end portion 1a of the preceding metal plate 1 reaches a fixed position (cutting point) of the laser beam welding apparatus, the traveling of the preceding metal plate 1 is stopped. Subsequently, when the leading end 2a of the trailing metal plate 2 reaches a fixed position (cutting point) of the laser beam welding apparatus, the traveling of the trailing metal plate 2 is also stopped (S1).

  Subsequently, the output side upper clamp 31 is lowered, and the preceding metal plate 1 is clamped by the output side clamp 3. Similarly, the entry-side upper clamp 41 is lowered and the trailing metal plate 2 is clamped by the entry-side clamp 4 (S2). Next, as shown in FIG. 5 (a), the guide roller 25 attached to the output side clamp support frame 15 is moved to the first output side provided in the lower cutting device 6 by the advancement of the guide roller cylinder 26. The pad 21 is pressed so that the first outgoing pad 21 and the second outgoing pad 23 do not interfere with each other (S3). In this state, the lower cutting device 6 is raised (S4).

  When the lower cutting device 6 reaches the rising end, the guide roller 25 is opened as shown in FIG. 5B (S5). Thereby, the 1st outgoing side pad 21 and the 2nd outgoing side pad 23 each contact in a contact surface. Subsequently, the entry-side clamp support frame 17 is advanced horizontally by the index mechanism moving cylinder 18 (index advance), and the second entry-side pad 24 provided on the entry-side clamp support frame 17 is provided on the lower cutting device 6. The first entry side pad 22 is brought into contact with and pressed (S6).

  By continuously moving the entry side clamp support frame 17 horizontally by the index mechanism moving cylinder 18, the state in which the second entry side pad 24 presses the first entry side pad 22 is maintained, and the exit side clamp support frame is retained. 17, the positional relationship between the lower cutting device 6 and the entry-side clamp support frame 17 is fixed. That is, the output side clamp 3, the lower cutting device 6, and the input side clamp 4 are mechanically restrained.

  Subsequently, the upper cutting device 7 is lowered, and the rear end 1a of the preceding metal plate 1 and the front end 2a of the subsequent metal plate 2 are simultaneously cut in a direction parallel to the width direction of the metal plates 1 and 2 (S7). ). When the cutting operation is completed, the index mechanism moving cylinder 18 is moved backward by a minute distance of about 5 mm before the upper cutting device 7 is raised (S8). As a result, a gap of about 5 mm is formed between the entrance blade surface of the upper cutting device 7 and the cutting end surface of the succeeding metal plate 2, and the entrance blade surface does not contact the cutting end surface when the upper cutting device 7 is raised.

  Next, as the guide roller cylinder 26 advances, the guide roller 25 is again pressed against the first outlet pad 21 provided in the lower cutting device 6 (S9). As a result, a gap of about 0.5 mm is formed between the exit blade surface of the upper cutting device 7 and the cutting end surface of the preceding metal plate 1, and the exit blade surface does not contact the cutting end surface when the upper cutting device 7 is raised. . In this state, the upper cutting device 7 is raised (S10). Thereafter, the lower cutting device 6 is lowered to the lower end (S11), the guide roller 25 is opened by the retraction of the guide roller cylinder 26 (S12), and the cutting operation is completed.

  Subsequently, the index mechanism moving cylinder 18 is moved forward horizontally, and as shown in FIG. 2, the cut end surface of the rear end portion of the preceding metal plate 1 and the cut end surface of the front end portion of the succeeding metal plate 2 are brought into contact with each other (S13). In this state, the machining head 8 mounted on the carriage frame 5 is moved in the welding direction to irradiate the butted portion of the metal plates 1 and 2 with a laser beam (S14). When the welding is completed and the irradiation of the laser beam is stopped, the outgoing upper clamp 31 and the incoming upper clamp 41 are raised, the clamps of the metal plates 1 and 2 are released (S16), and the welding operation is completed.

  According to the laser beam welding apparatus and the cutting method of the metal plate thereof according to the first embodiment, the output side fixing means disposed between the output side clamp support frame 15 and the lower cutting apparatus 6 as a displacement suppression mechanism during cutting. (First outlet pad 21, second outlet pad 23) and inlet side fixing means (first inlet pad 22, first outlet pad) disposed between the inlet side clamp support frame 17 and the lower cutting device 6. 2), the output side clamp support frame 15, the lower cutting device 6 and the input side clamp support frame 17 are cut during the cutting operation of the metal plates 1 and 2 by a cutting mechanism employing a double cut shear. Displacement can be suppressed, and cutting can be performed with the mutual positional relationship fixed.

  Thereby, since the cutting accuracy of the metal plates 1 and 2 is improved, the linearity of the cut end surfaces of the metal plates 1 and 2 is improved, and variations in the butt gap value can be suppressed. Moreover, since the path along which the machining head 8 moves is based on the cutting line 1b of the preceding metal plate 1, the laser beam is high at the abutting portion of the metal plates 1 and 2 by improving the linearity of the cut end surface. Irradiated with high accuracy, improving welding quality.

  In addition, after the cutting operation is completed, before the upper cutting device 7 is lifted, the index mechanism moving cylinder 18 is retracted by a minute distance, and the guide roller 25 is attached to the first outlet pad 21 provided in the lower cutting device 6. By pressing, when the upper cutting device 7 is raised, the incoming blade surface and the outgoing blade surface of the upper cutting device 7 do not contact the cutting end surface of the succeeding metal plate 2 and the cutting end surface of the preceding metal plate 1, respectively. Therefore, the cutting end face is not deformed, and the cutting accuracy can be further improved.

  In the first embodiment, the laser beam welding apparatus using the short-wavelength solid-state laser oscillator 11 as an oscillator for laser welding has been described. However, the type of laser is not limited to this, for example, The present invention can also be applied to a laser beam welding apparatus using a carbon dioxide laser oscillator. In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  The present invention can be used as a laser beam welding apparatus used in a steel process line.

1 preceding metal plate, 1a rear end, 1b cutting line,
2 trailing metal plate, 2a tip, 2b cutting line,
3 Clamp on exit side, 4 Clamp on entry side, 5 Carriage frame, 6 Lower cutting device
7 Upper cutting device, 8 processing head, 9 adjusting roller,
10 swaging roller, 11 short wavelength solid state laser oscillator, 12 fiber cable,
13 Lower cutting device lifting mechanism, 14 Upper cutting device lifting mechanism,
15 Outlet clamp support frame, 16 common base,
17 Entry side clamp support frame, 18 Index mechanism moving cylinder,
19 index mechanism frame, 20 index mechanism stopper,
21 first outgoing pad, 22 first incoming pad,
23 second outgoing pad, 24 second incoming pad,
25 guide roller, 26 guide roller cylinder,
31 Outlet upper clamp, 32 Outlet lower clamp,
41 Entry side upper clamp, 42 Entry side lower clamp.

Claims (8)

Conveying means for horizontally moving a metal plate having a predetermined width dimension in a direction perpendicular to the width direction;
An output side clamp for restraining and holding the preceding metal plate and an output side clamp support means for supporting the output side clamp;
An entry side clamp for restraining and holding the trailing metal plate, and an entry side clamp support means for supporting the clamp
A lower cutting means and an upper cutting means each provided so as to be movable up and down; a rear end portion of a preceding metal plate restrained and held by the output side clamp; and a trailing metal plate restrained and held by the entry side clamp Cutting means for simultaneously cutting the tip in a direction parallel to the width direction of the metal plate,
Laser irradiation means for irradiating a laser along the abutting portion of the cut end surface of the preceding metal plate and the subsequent metal plate,
Index mechanism moving means for horizontally moving the entry side clamp support means back and forth with respect to the moving direction of the metal plate,
An output side fixing means that is disposed between the output side clamp support means and the lower cutting means and fixes the positional relationship between the output side clamp support means and the lower cutting means when the lower cutting means is raised to the rising end. ,
It is disposed between the entry-side clamp support means and the lower cutting means, and when the lower-cutting means is raised to the rising end and the entry-side clamp support means is advanced horizontally by the index mechanism moving means, the entry is performed. An entry side fixing means for fixing the positional relationship between the side clamp support means and the lower cutting means;
At the time of the cutting operation by the cutting means, the lower cutting means is raised to the rising end, and then the entry side clamp support means is continuously advanced horizontally by the index mechanism moving means, and the output side clamp support means, the lower part A laser beam welding apparatus, wherein the cutting means and the entry side clamp support means are cut in a fixed state.   2. The laser beam welding apparatus according to claim 1, wherein the output side fixing means includes a first output side pad provided on a surface of the lower cutting means facing the output side clamp support means.   2. The laser beam welding apparatus according to claim 1, wherein the output side fixing means includes a second output side pad provided on a surface of the output side clamp support means facing the lower cutting means.   The output side fixing means is provided on a surface of the lower cutting means facing the output clamp support means, and on a surface of the output clamp support means facing the lower cutting means. 2. The laser beam welding apparatus according to claim 1, further comprising a second outgoing pad that is provided and contacts the first outgoing pad. 3.   The output-side clamp support means presses the lower-cutting means in the direction of the input-side clamp support means when the lower-cutting means is raised, so that the first output-side pad and the second output-side pad do not interfere with each other. And a guide roller that releases the pressure of the lower cutting means when the lower cutting means stops moving and abuts the first outgoing pad and the second outgoing pad. The laser beam welding apparatus according to claim 4.   The said entrance side fixing means contains the 1st entrance side pad provided in the surface facing the said entrance side clamp support means of the said lower cutting means, The any one of Claims 1-5 characterized by the above-mentioned. The laser beam welding apparatus according to Item.   The said entrance side fixing means contains the 2nd entrance side pad provided in the surface facing the said lower cutting means of the said entrance side clamp support means, The any one of Claims 1-6 characterized by the above-mentioned. The laser beam welding apparatus according to Item. Conveying means for horizontally moving a metal plate having a predetermined width dimension in a direction perpendicular to the width direction, an output side clamp for restraining and holding the preceding metal plate, an output side clamp support means for supporting the same, and a trailing metal plate Entry side clamp for restraining and holding, Entry side clamp support means for supporting the same, Cutting means having upper and lower cutting means provided so as to be movable up and down, and cutting end faces of the preceding metal plate and the succeeding metal plate Of the metal plate in the laser beam welding apparatus comprising laser irradiation means for irradiating a laser along the abutting portion of the laser beam and an index mechanism moving means for horizontally moving the entry side clamp support means back and forth with respect to the moving direction of the metal plate Cutting method,
A first step of restraining and holding the preceding metal plate and the succeeding metal plate, which are conveyed by the conveying means and stopped at a fixed position, by an output side clamp and an input side clamp, respectively;
Subsequent to the first step, the lower cutting means is raised to the ascending end, and a first output pad provided on the lower cutting means and a second output provided on the output clamp support means. A second step of contacting the side pads;
Subsequent to the second step, the entry-side clamp support means is horizontally advanced by the index mechanism moving means, and a second entry-side pad provided on the entry-side clamp support means is provided on the lower cutting means. A third step of contacting the first entry pad;
Subsequent to the third step, the indexing mechanism moving means continuously advances the entry side clamp support means horizontally, and the exit side clamp support means, the lower cutting means, and the entry side clamp support means are mutually connected. The upper cutting means is lowered while the positional relationship is fixed, and a fourth step of simultaneously cutting the rear end portion of the preceding metal plate and the front end portion of the succeeding metal plate in a direction parallel to the width direction of the metal plate A method for cutting a metal plate in a laser beam welding apparatus.

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