WO2014129635A1 - レーザ溶接装置及びレーザ溶接方法 - Google Patents
レーザ溶接装置及びレーザ溶接方法 Download PDFInfo
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- WO2014129635A1 WO2014129635A1 PCT/JP2014/054388 JP2014054388W WO2014129635A1 WO 2014129635 A1 WO2014129635 A1 WO 2014129635A1 JP 2014054388 W JP2014054388 W JP 2014054388W WO 2014129635 A1 WO2014129635 A1 WO 2014129635A1
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- laser
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/187—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping combined with soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/03—Observing, e.g. monitoring, the workpiece
- B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/044—Seam tracking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
- B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
- B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/26—Seam welding of rectilinear seams
- B23K26/262—Seam welding of rectilinear seams of longitudinal seams of tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0221—Laser welding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/38—Conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/20—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
- H01R43/048—Crimping apparatus or processes
- H01R43/055—Crimping apparatus or processes with contact member feeding mechanism
Definitions
- the present invention relates to a laser welding apparatus and a laser welding method for welding a butt interface or an overlapped portion of a workpiece by laser irradiation.
- Wire harnesses are often used for in-vehicle wiring.
- the wire harness is a set of a plurality of covered electric wires in a collective part according to the specifications of in-vehicle wiring.
- a terminal for connection (hereinafter referred to as a crimp terminal) is crimped to the end of each covered electric wire.
- a crimp terminal When connecting the crimp terminal to the wire terminal of the wire harness, peel off the insulation coating layer of the wire terminal to expose the core wire, and crimp the core wire barrel of the crimp terminal to the core wire exposed part to crimp the wire terminal. Electrical connection with the terminal is made.
- connection part of a crimp terminal and an electric wire terminal is resin-sealed in order to prevent the corrosion of a core wire by the penetration
- the crimping part (wire connection part) of the crimping terminal is bent into a cylindrical shape by press molding, and the entire butt interface at both ends of the plate material formed in the cylindrically bent part is joined by laser welding to seal the crimping part.
- the cylindrically bent portion has a curved shape with one end tapered or a curved shape (see FIG. 8). To join the butt interface of the portion by laser welding, It is necessary to move the focal point of the laser beam along.
- the problem to be solved by the present invention is to provide a laser welding apparatus and a laser welding method capable of performing laser welding of a butt interface of workpieces with high quality.
- a laser welding apparatus welds a butt interface of a workpiece by laser beam irradiation while sequentially supplying a workpiece having a butt interface to a welding position.
- An X / Y-axis scanner that scans laser light output from a laser light source in the X-axis and Y-axis directions orthogonal to each other in a two-dimensional plane, and a measuring device that measures dimensions along the butt interface
- a scanner control device for driving and controlling the X / Y-axis scanner so as to weld the butt interface by laser light irradiation.
- the laser welding apparatus configured as described above measures the dimension of the butt interface of the workpiece with high accuracy and scans the laser light along the butt interface by driving and controlling the X / Y axis scanner. That is, the focal point of the laser beam can be moved. Thereby, the butt interface can be laser-welded with high quality.
- the measuring device measures the gap size of the butt interface.
- the welding quality is remarkably deteriorated.
- the press can be stopped or an alert can be issued.
- the laser welding apparatus is characterized in that the measuring device measures the gap size between the upper and lower surfaces of the overlapped portion in which the plate materials of the workpiece are overlapped in a planar shape.
- the measuring device measures the gap size between the upper and lower surfaces of the overlapped portion in which the plate materials of the workpiece are overlapped in a planar shape.
- the welding quality is remarkably deteriorated.
- the press can be stopped or an alert can be issued.
- the laser welding apparatus of the present invention includes a workpiece holding mechanism that holds the workpiece supplied to the welding position at an appropriate position and posture, and the workpiece holding mechanism allows the workpiece to be held by the workpiece holding mechanism. It is desirable to perform laser light irradiation while being held.
- the workpiece can be welded with high accuracy by performing welding by laser irradiation while the workpiece is held by the workpiece holding mechanism.
- a laser welding method of the present invention is a laser welding method in which a workpiece having a butt interface is sequentially supplied to a welding position, and the butt interface of the workpiece is welded by laser light irradiation.
- a workpiece having a butt interface is sequentially supplied to a welding position, and the butt interface of the workpiece is welded by laser light irradiation.
- an X / Y-axis scanner that scans the laser light output from the laser light source in the X-axis and Y-axis directions orthogonal to each other in a two-dimensional plane, and measures the dimension along the butt interface.
- the X / Y-axis scanner is driven and controlled to weld the butt interface by laser light irradiation.
- the dimension of the butt interface of the workpiece is measured with high accuracy, and the laser beam is scanned along the butt interface by driving and controlling the X / Y axis scanner. Therefore, the butt interface can be laser-welded with high quality.
- FIG. 1 Device configuration diagram of the first embodiment of the present invention
- A Conceptual diagram illustrating a workpiece having a gap at the butt interface and a form of a clamping device before the workpiece is sandwiched.
- B A workpiece with the workpiece sandwiched by a clamping device.
- A Conceptual diagram illustrating a workpiece having a gap at the butt interface and a form of a clamping device before the workpiece is sandwiched.
- B A workpiece with the workpiece sandwiched by a clamping device.
- the crimp terminal 80 is (a) a belt-shaped metal plate 81 that is fed forward at a constant pitch in the longitudinal direction (direction of arrow A), and (b) the carrier portion 82 and the unfolded state. (C) A plate material that can be formed into a crimping portion 85 by integrally molding the box-shaped connector portion 84 and the cylindrical crimping portion 85 by punching and bending the terminal material 83. It is manufactured through a series of processes in which the butted interface 86a and the overlapping portion 86b at both ends are joined by laser welding.
- the abutting interface refers to a portion where one end surface in the bending direction of the plate material constituting the crimping portion 85 and the other end surface are abutted and brought into contact with each other.
- FIG. 1 is a system configuration diagram showing a first embodiment of a laser welding apparatus of the present invention.
- the laser welding apparatus 10 sequentially supplies unwelded crimp terminals 87, which are workpieces, to a welding position, and welds the butt interface 86a and the overlapping portion 86b of the crimp portion 85 of the crimp terminal 87 by laser irradiation.
- Device As shown in FIG. 9C, the crimp terminals 87 are sequentially fed to the welding position P in the form of chain terminals 88 that are cantilevered by the carrier portion 82 at regular intervals, and are subjected to welding by laser irradiation. Is done.
- the laser welding apparatus 10 includes a laser light source 20, a laser irradiation optical device 30, a feeding device 40, a workpiece holding mechanism 50, a measuring device 60, and a control device 70.
- the laser light source 20 is a known fiber laser, and oscillates laser light having a wavelength in the near-infrared region using a silica optical fiber doped with a rare earth element as a laser medium.
- the laser irradiation optical device 30 is an optical device for guiding the laser beam output from the laser light source 20 to the welding position P.
- the laser irradiation optical device 30 includes an X / Y-axis scanner 31, a Z-axis scanner 32, and a condenser lens 33.
- the X / Y-axis scanner 31 is a two-axis (XY) type galvano scanner, and sequentially includes two mirrors 31X and 31Y whose angles are controlled in synchronization with each other around axes orthogonal to each other.
- the laser beam LB By reflecting the laser beam LB, the laser light LB is swept onto the butt interface 86a and the overlapping portion 86b of the crimp terminal 87 stopped at the welding position P.
- the Z-axis scanner 32 is an optical device for adjusting the focal position in the irradiation direction (Z-axis direction) of the laser beam LB scanned by the X / Y-axis scanner 31.
- the Z-axis scanner 32 is provided on the optical path of the laser beam LB incident on the X / Y-axis scanner 31.
- the Z-axis scanner 32 includes an incident lens 32A located on the laser light source 20 side, an exit lens 32B located on the X / Y-axis scanner 31 side, and an exit lens 32B with respect to the entrance lens 32.
- a lens drive mechanism 32C that moves in the direction of the optical axis of each other.
- a plano-concave lens is used as the entrance lens 32A
- a plano-convex lens is used as the exit lens 32B.
- the X / Y-axis scanner 31 and the Z-axis scanner 32 are driven and controlled by a galvano control system 34.
- the irradiation position of the laser beam LB in the horizontal plane can be adjusted by controlling the angles of the mirrors 31X and 31Y, and the sweep speed of the laser beam LB can be adjusted by controlling the rotation speed of the mirrors 31X and 31Y.
- the focal position in the irradiation direction of the laser beam LB can be adjusted by controlling the position of the exit lens 32B relative to the entrance lens 32A.
- the condensing lens 33 is an optical coupling system that condenses the laser beam LB from the X / Y-axis scanner 31 at the position of the butting interface 86a and the overlapping portion 86b of the crimp terminal 87.
- a telecentric lens or an f ⁇ lens is used as the condenser lens 33.
- the feeding device 40 is a device that sequentially supplies the crimp terminals 87 to the welding position P by feeding the chain terminals 88 at a constant pitch corresponding to the interval L where the crimp terminals 87 are arranged.
- the feeding device 40 has twin rollers 41 and 42 that rotate while sandwiching the carrier portion 82 of the chain terminal 88 from above and below in the vicinity of the upstream side and the downstream side of the welding position P in the feed direction of the chain terminal 88. Yes.
- the twin rollers 41 and 42 include feed rollers 41A and 42A that are in contact with the lower surface of the carrier portion 82, and pressing rollers 41B and 42B that are in contact with the upper surface. The pressing rollers 41B and 42B are driven to rotate while pressing the carrier portion 82 from above.
- the feed rollers 41A and 42A are rotationally driven at a constant speed by a drive mechanism (not shown).
- Feeding claws 45 project from the outer peripheral surfaces of the feeding rollers 41A and 42A at equal intervals in the circumferential direction.
- the feed claw 45 engages with a feed hole 89 (see FIG. 9C) of the carrier portion 82.
- the feed claw 45 engaged with the feed hole 89 of the carrier portion 82 moves the chain terminal 88 by an interval L where the crimp terminals 87 are arranged.
- the workpiece holding mechanism 50 is a device for holding the crimp terminal 87 supplied to the welding position P in an appropriate position and posture and eliminating the gap at the butt interface 86a.
- the workpiece holding mechanism 50 includes an upper clamp jig 51 and a lower clamp jig 52, and sandwiches the crimping portion 85 of the crimp terminal 87 from above and below with both clamp jigs 51 and 52.
- the clamp jigs 51 and 52 are formed with semi-cylindrical recesses 51a and 52a that are cylindrical when they are attached to each other.
- the crimping portion 85 of the crimping terminal 87 By sandwiching the crimping portion 85 of the crimping terminal 87 from above and below by the clamp jigs 51 and 52, the crimping portion 85 is held at an appropriate position and posture. Even when there is a gap at the butt interface 86a of the crimping portion 85, the end faces of the gap portion are forcibly pressed together and the gap is eliminated.
- a slit 51b is formed in the upper clamp jig 51 so as not to obstruct the irradiation of the laser beam LB onto the butt interface 86a.
- a pressing member for pressing a part of the chain terminal 88 may be provided.
- the workpiece holding mechanism 50 is not limited to the configuration shown in FIGS. 2A and 2B, and when the gap is not generated at the butt interface 86 a of the crimping portion 85 formed by bending, For example, you may employ
- the clamp jig 55 is formed with, for example, a substantially C-shaped portion 55 a that abuts and presses against the crimping portion 85 at two points.
- the clamp jig 56 is formed with a substantially flat contact surface 56a that contacts the crimping portion 85 at one point.
- the measuring device 60 has a shape detector 61 and a data processing system 62 using a CCD camera or the like.
- the shape detector 61 is installed at a predetermined position upstream of the welding position P so as to face the passage region of the crimp terminal 87. In this example, it is provided facing the upstream position by a distance corresponding to 5 pitches (L ⁇ 5) from the welding position P.
- the shape detector 61 detects the shape of the crimp terminal 87 which is a workpiece, and outputs the detected data.
- the shape detector 61 of this embodiment includes a CCD camera (not shown).
- the shape detector 61 includes a CCD camera for imaging the gap size of the butt interface 86a and a CCD camera for imaging the gap size of the upper and lower surfaces of the overlapping portion 86b obtained by superimposing the plate materials.
- a laser scanner and a light receiving device may be provided, and the reflected light from the crimping portion 85 is received while scanning the surface of the crimping portion 85 of the unwelded crimping terminal 87 with laser light.
- the received light signal can be output as detection data.
- the detection method is based on whether or not leakage light is imaged from the opposite side by irradiating light toward the cylindrical portion. Also good.
- the data processing system 62 processes the detection data from the shape detector 61 to measure the gap size along the butt interface 86a and the gap size of the upper and lower surfaces of the overlapping portion 86b, and the measurement result is used as the butt interface. It outputs as profile data of 86a and superposition part 86b. This profile data is input to the control device 70.
- the measuring device 60 configured as described above can suppress the occurrence of defective products and product variations by measuring the gap size of the butt interface 86a and the gap size of the upper and lower surfaces of the overlapping portion 86b. .
- the welding quality will be significantly reduced, but by measuring the gap before welding, the occurrence of defective products and product variations can be suppressed. Can do.
- the press can be stopped or an alert can be issued.
- the control device 70 is a computer system that controls the overall operation of the laser welding apparatus 10.
- a laser irradiation program by the laser welding apparatus 10 is installed in the control device 70.
- the control device 70 transmits a control signal based on the profile data generated by the measurement device 60 to the galvano control system 34 by executing the laser irradiation program.
- the galvano control system 34 drives and controls the X / Y-axis scanner 31 and the Z-axis scanner 32 according to this control signal, so that the butt interface 86a and the overlapping portion 86b are welded by laser light irradiation.
- the shape of the space curve C shown in FIG. 6 and the dimensions of each part are measured.
- the two straight line portions C1 and C2 of the space curve C are portions where two-dimensional processing is performed, and the curved portion C3 between the two straight line portions C1 and C2 is a portion where three-dimensional processing is performed.
- Data such as the position, length (dimension), curvature, and inclination of each part C1, C2, and C3 is reflected in the control operation by the laser irradiation program.
- the overlapping portion 86b is programmed to execute welding so as to cross the scanning line in the case of butt welding at a position away from the lowest point a of the curved portion C3 by a predetermined distance.
- the measured value of the width dimension is reflected in the control operation by the laser irradiation program.
- the laser welding apparatus 10 measures the gap size of the butt interface 86a of the crimp terminal 87 that is a workpiece and the gap size of the upper and lower surfaces of the overlapping portion 86b, and based on the measurement result, X ⁇
- the focal position of the laser beam LB is three-dimensionally controlled with high accuracy so that the intensity of the laser beam LB at the irradiation position can be welded. Since the laser beam is scanned along the overlapping portion 86b, the butt interface 86a and the overlapping portion 86b of the crimp terminal 87 can be laser-welded with high quality.
- the measurement by the measuring device 60 need not be performed for all the crimp terminals 87.
- the measurement may be performed on at least one crimping terminal 87 at the initial stage when the chain terminal 88 is set in the laser welding apparatus 10 and welding is started. If the control device 70 is set so that the profile data is automatically updated when the work piece is changed to a crimp terminal 87 having a different shape and size, the operator can input numerical values when the work piece is changed. Work and the like are unnecessary, and the laser welding processing line can be operated with high efficiency.
- FIG. 7 is a system configuration diagram showing a second embodiment of the laser welding apparatus of the present invention.
- the laser welding apparatus of the second embodiment has a laser processing head 101 and a robot arm (not shown), and sweeps the laser beam LB by moving the laser processing head 101 itself in the XYZ directions by the robot arm.
- the dielectric multilayer flat mirror 103 that reflects the laser light LB from the laser light source 20 downward and falls on the welding position P, and the laser light LB from the dielectric multilayer flat mirror 103.
- the laser processing head 101 can be moved in a three-dimensional direction with high accuracy by controlling the driving of the robot arm based on the measurement result by the measurement apparatus 60.
- the focus position of the laser beam LB is three-dimensionally controlled with high accuracy so that the intensity of the laser beam LB at the irradiation position can be welded, and the butt interface 86a and the overlapping portion 86b of the crimp terminal 87 are of high quality. Laser welding is possible.
- the configuration of the present invention is not limited to the configuration of the above embodiment.
- the laser irradiation optical device 30 does not include the Z-axis scanner 32, and drives and controls the X / Y-axis scanner 31 on the basis of the measurement result of the butt interface state measurement device 60. Even if only the direction is scanned, laser welding can be performed with high quality. Further, the crimping portion 85 of the crimp terminal 80 may be formed with an overlapping portion in which both ends of the plate material are overlapped instead of the butt interface.
- the laser welding apparatus measures the dimension along the overlapping portion with the measuring device, and based on the measurement result, the X / Y axis scanner
- the overlapping portion may be welded by laser light irradiation while controlling the driving of the laser beam. In this way, laser welding can be performed with high quality.
- a plano-concave lens is used for the entrance lens 32A and a plano-convex lens is used for the exit lens 32B.
- a plano-convex lens can be used for both the entrance lens 32A and the exit lens 32B as shown in FIG. is there.
- the laser light source 20 is not limited to a fiber laser.
- the crimping part 85 workpiece is not limited to the crimping terminal 87. That is, the present invention can be applied to a laser welding apparatus for all workpieces having a butt interface between metal sheets. It is also possible to use an XYZ stage instead of the robot arm.
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- Optics & Photonics (AREA)
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- General Physics & Mathematics (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
図1は本発明のレーザ溶接装置の第1の実施形態を示すシステム構成図である。このレーザ溶接装置10は、被加工物である未溶接の圧着端子87を溶接加工位置に順次供給し、その圧着端子87の圧着部85の突き合わせ界面86a及び重ね合わせ部86bをレーザ照射により溶接する装置である。圧着端子87は、図9(C)に示すように一定の間隔でキャリア部82に片持ち支持された連鎖端子88の形態で溶接加工位置Pに順次送り込まれて、レーザ照射による溶接加工が施される。
図7は本発明のレーザ溶接装置の第2の実施形態を示すシステム構成図である。ここでは、第1の実施形態と共通の構成要素については図中に同一符号を付し、説明を適宜省略する。第2の実施形態のレーザ溶接装置は、レーザ加工ヘッド101と図示しないロボットアームとを有し、ロボットアームによってレーザ加工ヘッド101自体をXYZ方向に移動させることにより、レーザ光LBを掃引する。レーザ加工ヘッド101内には、レーザ光源20からのレーザ光LBを下向きに反射させて溶接加工位置Pに落射させる誘電体多層膜平面ミラー103と、誘電体多層膜平面ミラー103からのレーザ光LBを圧着端子87の突き合わせ界面86aの位置に集光させる集光レンズ104とが設けられている。
この第2の実施形態のレーザ溶接装置10においても、測定装置60による測定結果に基づいてロボットアームを駆動制御することにより、レーザ加工ヘッド101を3次元方向に高精度に移動させることができるので、照射位置におけるレーザ光LBの強度が溶接可能な強度になるようにレーザ光LBの焦点位置を高精度に3次元制御して、圧着端子87の突き合わせ界面86a及び重ね合わせ部86bを高品質にレーザ溶接することができる。
本発明の構成は上記実施形態の構成に限定されるものではない。レーザ照射光学装置30は、Z軸スキャナ32を備えず、突き合わせ界面状測定装置60の測定結果に基づいてX・Y軸スキャナ31を駆動制御し、レーザ光LBの焦点位置をX軸及びY軸方向のみ走査するようにしても、高品質にレーザ溶接することができる。また、圧着端子80の圧着部85には、突き合わせ界面に代えて、板材両端を重ね合わせた重ね合わせ部を形成してもよい。このように突き合わせ界面の代わりに重ね合わせ部を圧着部に形成した場合、レーザ溶接装置は、当該重ね合わせ部に沿った寸法を測定装置により測定し、その測定結果に基づいてX・Y軸スキャナを駆動制御しつつ、重ね合わせ部をレーザ光照射により溶接すればよい。このようにして高品質にレーザ溶接することができる。
20 レーザ光源
30 レーザ照射光学装置
31 X・Y軸スキャナ
31X ミラー
31Y ミラー
32 Z軸スキャナ
32A 入射レンズ
32B 出射レンズ
32C レンズ駆動機構
40 送り装置
50 被加工物保持機構
51 上クランプ治具
52 下クランプ治具
60 突き合わせ界面状測定装置
61 3次元形状検出器
70 制御装置
80 圧着端子
81 金属板
85 圧着部
86a 突き合わせ界面
86b 重ね合わせ部
101 レーザ加工ヘッド
C 空間曲線
C1 直線部
C2 直線部
C3 曲線部
LB レーザ光
P 溶接加工位置
Claims (5)
- 突き合わせ界面を有する被加工物を溶接加工位置に順次供給しつつ、当該被加工物の突き合わせ界面をレーザ光照射により溶接するレーザ溶接装置であって、
レーザ光源から出力されたレーザ光を互いに直交するX軸及びY軸方向に走査するX・Y軸スキャナと、
前記突き合わせ界面に沿った寸法を測定する測定装置と、
前記突き合わせ界面をレーザ光照射により溶接するべく、前記X・Y軸スキャナを駆動制御するスキャナ制御装置と、を有するレーザ溶接装置。 - 前記測定装置は、前記突き合せ界面の隙間寸法を測定することを特徴とする請求項1記載のレーザ溶接装置。
- 前記測定装置は、前記被加工物の板材を面状に重ね合わせた重ね合わせ部の上下面の隙間寸法を測定することを特徴とする請求項1又は2記載のレーザ溶接装置。
- 前記溶接加工位置に供給された前記被加工物を適正な位置・姿勢に保持する被加工物保持機構を有し、
前記被加工物保持機構により前記被加工物が保持されている間にレーザ光照射を実行する、請求項1乃至3のいずれか1項に記載のレーザ溶接装置。 - 突き合わせ界面を有する被加工物を溶接加工位置に順次供給しつつ、当該被加工物の突き合わせ界面をレーザ光照射により溶接するレーザ溶接方法であって、
レーザ光源から出力されたレーザ光を二次元平面内において互いに直交するX軸及びY軸方向に走査するX・Y軸スキャナを使用し、
前記突き合わせ界面に沿った寸法を測定し、
前記突き合わせ界面をレーザ光照射により溶接するべく、前記X・Y軸スキャナを駆動制御することを特徴とするレーザ溶接方法。
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JP5338890B2 (ja) * | 2011-12-15 | 2013-11-13 | Jfeスチール株式会社 | レーザ溶接の溶接位置検出装置および溶接位置検出方法 |
EP2961010B8 (en) * | 2013-02-22 | 2018-05-23 | Furukawa Electric Co., Ltd. | Method for manufacturing crimp terminal, crimp terminal, and wire harness |
CN105705289B (zh) * | 2013-11-15 | 2018-06-22 | 松下知识产权经营株式会社 | 激光焊接条件确定方法以及激光焊接装置 |
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JP7278868B2 (ja) * | 2019-05-27 | 2023-05-22 | 株式会社オーク製作所 | レーザ加工装置 |
CN110315225B (zh) * | 2019-08-07 | 2024-05-24 | 重庆市灵龙自动化设备有限公司 | 板簧自动上料及装配的焊接机 |
CN110788485A (zh) * | 2019-09-24 | 2020-02-14 | 南京英田激光科技有限公司 | 一种适用于长轨迹焊缝的手持激光焊接机 |
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