• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    laser welding apparatus and laser welding method. the present invention relates to a laser welding apparatus that generates laser by a laser oscillator, which converges the laser through a condenser lens, and applies the laser to an upper plate (101) and a lower plate (102 ), superimposed together, in order to weld the upper plate (101) and the lower plate (102) to each other. according to this apparatus, by irradiation of the laser, a puddle of molten y is formed on the upper plate (101) and on the lower plate (102), superimposed together. furthermore, by laser irradiation, the puddle of molten y is forced to flow, and the upper plate (101) and the lower plate (102) are welded together.
    公开号:BR112013027441B1
    申请号:R112013027441-7
    申请日:2012-04-20
    公开日:2021-04-27
    发明作者:Shuhei Ogura；Atsushi Kawakita；Toshiri Yui
    申请人:Toyota Jidosha Kabushiki Kaisha；
    IPC主号:
    专利说明:

    BACKGROUND OF THE INVENTION 1. Field of the Invention
    [0001] The invention relates to a technology concerning a laser welding apparatus and a laser welding method. 2. Description of the Related Art
    [0002] Laser welding is a welding method in which the laser generated by a laser oscillator is converged by a condenser lens, and is applied to the superimposed steel sheets in order to weld the sheets. However, in laser welding, the joint strength declines in the case where the sheet gap between steel sheets that are superimposed together is large. For example, if there is an inter-plate gap greater than or equal to 0.3 mm, a weld drop surface sometimes settles, resulting in reduced joint strength. In addition, if the inter-plate clearance is greater than 0.5 mm, it sometimes happens that a penetration hole forms, and the joint strength declines.
    [0003] When welding an object in a three-dimensional shape, for example, a motor vehicle body, etc., it is difficult to correctly control the inter-plate clearance, for example, 0.3 mm or less. For the time being, an inter-plate clearance of about 1 mm is practically permitted, in the case of manufacture of motor vehicle bodies, and the like. Therefore, it has become an objective to weld steel sheets with an inter-plate clearance of about 1 mm without a decline in joint strength. Now, some measures against reducing the resistance of the laser welding joint of a large inter-plate gap are taken in practice.
    [0004] Japanese Patent Application Publication No. 2004- 025219 (JP 2004-025219 A) discloses a method in which an inter-plate gap is welded by the use of a shim bearing. However, in the case where a motor vehicle body, or the like, is welded, two or three steel plates are sometimes welded. Therefore, in the welding method technology disclosed by JP 2004-025219 A, there is a need to highly replace shims or the like, and therefore production efficiency declines.
    [0005] Japanese Patent Application Publication No. 2005 131707 (JP 2005-131707 A) discloses a method in which laser spot welding is performed alternately with welding sites using a clamp. However, in a method disclosed by JP 2005-131707 A, a larger, dedicated clamp is required for welding a motor vehicle body, or the like. In addition, in the welding method disclosed in JP 2005-131707 A, when a zinc-coated steel is to be welded, laser spot welding results in a welding failure caused by blowing deposition vapor.
    [0006] In Japanese Patent Application Publication No. 2010 023047 (JP 2010-023047 A), the first laser irradiation is carried out in an unfocused state to fuse the upper plate so that a protrusion is formed towards the side of the lower plate and therefore the clearance is reduced, and then the second laser irradiation is performed to effect a penetration weld. However, according to the welding method disclosed in JP 2010-023047 A, since the first laser irradiation is low energy irradiation, the first laser irradiation achieves the heat conduction melting in the upper plate, instead of the melting guided. Therefore, processing time becomes long, and productivity declines. SUMMARY OF THE INVENTION
    [0007] The invention provides a laser welding apparatus and a laser welding method capable of welding a plurality of plates without a decline in joint strength even in the case where there is a large inter-plate gap.
    [0008] A first aspect of the invention is a laser welding apparatus for welding a plurality of plates, superimposed together, the laser welding apparatus including: a laser oscillator that generates laser; and a condenser lens that converges the laser, in which the laser welding apparatus is configured to weld the plurality of superimposed plates together by applying the laser to the plurality of superimposed plates together in order to form a pool of molten in the plurality of plates , and applying the laser to the molten pool so that the molten pool drains.
    [0009] In the first aspect of the invention, the laser welding apparatus can be configured to cause the melt puddle to flow by scanning the laser applied to the melt puddle, by activating the condenser lens.
    [00010] In the first aspect of the invention, the laser welding apparatus may additionally include a template that is operable while retaining the plurality of plates, and the laser welding apparatus may be configured to cause the melt puddle to flow by scanning the laser applied to the molten pool, by activating the template.
    [00011] In the first aspect of the invention, the laser welding apparatus can be configured to cause the melt puddle to flow in a predetermined direction of rotation on a predetermined axis that extends through the melt puddle, by scanning the laser applied to the molten pool in the direction of predetermined rotation on the predetermined axis.
    [00012] In the first aspect of the invention, the laser welding apparatus can be configured to cause the melt puddle to flow by scanning the laser in the predetermined rotation direction along a portion of the outer edge of the melt puddle after pool of melt is forced to flow in the direction of predetermined rotation on the predetermined axis.
    [00013] In the first aspect of the invention, the laser welding apparatus can be configured to cause the molten pool to flow in the predetermined rotation direction on the predetermined axis that extends through the molten pool, and converges towards the predetermined axis by scanning the laser in the direction of predetermined rotation on the predetermined axis so that the scan converges to the predetermined axis.
    [00014] A second aspect of the invention is a laser welding method, whereby a plurality of superimposed plates are welded together, the laser welding method including: laser generation by a laser oscillator; convergence of the laser through a condenser lens; formation of a melt pool in the plurality of plates superimposed together by the application of the laser to the plurality of plates; and causing the melt puddle to drain by applying the laser to the melt puddle.
    [00015] In the second aspect of the invention, when the melt puddle is forced to flow, the laser applied to the melt puddle can be scanned by activating the condenser lens.
    [00016] In the second aspect of the invention, when the molten pool is forced to flow, the laser applied to the molten pool can be scanned by actuating a template that retains the plurality of plates.
    [00017] In the second aspect of the invention, when the melt puddle is forced to flow, the melt puddle can be forced to flow in a predetermined direction of rotation on a predetermined axis that extends through the melt puddle by scanning the laser applied to the molten pool in the direction of predetermined rotation on the predetermined axis.
    [00018] In the second aspect of the invention, when the molten pool is forced to flow, the molten pool can be forced to flow, and is enlarged by scanning the laser in the predetermined direction of rotation along a portion of the outer edge of the melt pool after causing the melt pool to flow in the predetermined rotation direction on the predetermined axis.
    [00019] In the second aspect of the invention, when the melt puddle is forced to flow, the melt puddle can be forced to flow in the predetermined rotation direction on the predetermined axis, in order to converge towards the predetermined axis by sweeping the laser in the direction of predetermined rotation on the predetermined axis, so that the scan converges to the predetermined axis.
    [00020] According to the laser welding apparatus and the laser welding method, according to the invention, it is possible to weld a plurality of plates without a decline in joint strength, even if the inter-plate clearance is large . BRIEF DESCRIPTION OF THE DRAWINGS
    [00021] Characteristics, advantages and technical and industrial significance of exemplary embodiments of the invention will be described below with reference to the accompanying drawings, in which similar numerals denote similar elements, and in which: FIG. 1 is a construction diagram showing a construction of a laser welding apparatus according to an embodiment of the invention; FIG. 2 is a flow chart showing a flow of a welding method according to a first embodiment; FIGS. 3A and 3B show views in schematic perspectives and their views in corresponding sections each taken along line B-B, respectively, showing the operation of the welding method of the first embodiment; FIG. 4 is a flow chart showing a flow of a welding method according to a second embodiment; FIGS. 5A and 5B show views in schematic perspectives and their views in corresponding sections each taken along line B-B, respectively, showing the operation of the welding method of the second embodiment; FIG. 6 is a flow chart showing a flow of a welding method according to a third embodiment; FIGS. 7A and 7B show views in schematic perspectives and their views in corresponding sections each taken along line B-B, respectively, showing the operation of the welding method according to a third embodiment; FIG. 8 is a flow chart showing a flow of a welding method according to a fourth embodiment; and FIGS. 9A and 9B show views in schematic perspectives and their views in corresponding sections each taken along line B-B, respectively, showing the operation of the welding method according to a fourth embodiment. DETAILED DESCRIPTION OF THE ACCOMPLISHMENTS
    [00022] With reference to FIG. 1, a laser welding apparatus 10 will be described. The laser welding apparatus 10 is an embodiment of the laser welding apparatus of the invention. The laser welding apparatus 10 is a device that performs laser welding. Laser welding is a welding method in which while laser light is applied, as a heat source, to metal parts while focused on metal parts so that metal parts are locally melted and solidified to come together.
    [00023] In the embodiment described below, it is assumed that in order to build a motor vehicle body, two superimposed steel plates, that is, an upper plate 101 and a lower plate 102, are welded together by laser welding using the laser welding apparatus 10. It is also assumed that the overlapping top plate 101 and bottom plate 102 have an inter-plate clearance of 1 mm.
    [00024] The construction of the laser welding apparatus 10 will be described. The laser welding apparatus 10 includes a laser oscillator 11, an optical path 12, a laser irradiation head 13, and condenser lenses 14. The laser oscillator 11 generates CO2 laser or YAG laser as a source of welding heat. The optical path 12 guides the laser generated by the oscillator to the laser irradiation head 13. The optical path 12 transmits the laser by curving it via mirrors, or transmits the laser by curving it through an optical fiber.
    [00025] The laser irradiation head 13 applies the laser transmitted through the optical path 12, to the upper plate 101 and to the lower plate 102 above the upper plate 101. The laser radiation head 13 is moved to a position on the upper plate 101 by a robot (not shown). The condenser lenses 14 condense the laser transmitted through the optical path 12 to a size suitable for irradiation, and sweep the laser on an object to be welded. The condenser lenses 14 are housed within the laser irradiation head 13.
    [00026] The operation of the laser welding apparatus 10 will be described. The laser welding apparatus 10 generates laser by the laser oscillator 11, and converges the laser generated by the laser oscillator 11 through the use of the condenser lenses 14, and applies the laser converged by the condenser lenses 14 to the upper plate 101 and the lower plate 102 superimposed together, and thereby weld the upper plate 101 and the lower plate 102 together.
    [00027] With reference to FIG. 2 and FIG. 3, a laser welding method S100 will be described. The S100 laser welding method is a first embodiment of the laser welding method using the laser welding apparatus of the invention. Incidentally, the steps in FIG. 2 correspond to the steps in FIGS. 3A and 3B. In addition, FIG. 3B shows sectional views each taken along line BB in FIG. 3A.
    [00028] With reference to FIG. 2, a flow of the S100 laser welding method will be described. In step S110, the laser welding apparatus 10 applies a laser beam to the upper plate 101 and the lower plate 102, superimposed together, from above the upper plate 101. At this moment, the laser welding apparatus 10 sweeps the beam of laser applied so that a region occupied by the irradiation trace with the laser beam forms a rectangular conformation in a plane view, whereby a puddle of molten Y is formed on the upper plate 101 and on the lower plate 102, superimposed together. Incidentally, although in this embodiment, the laser irradiation trace forms a rectangular conformation, the shape of the irradiation trace can also be a different shape, such as a circular shape, an elliptical shape, etc.
    [00029] In step S120, the laser welding apparatus 10 applies a laser beam to the puddle of molten Y formed as described above, and sweeps the laser beam so that the irradiation trace with the laser beam becomes a drop in line, whereby an interior of the melt pool Y formed between the upper plate 101 and the lower plate 102 is forced to flow. Although the laser irradiation trace is the inline drop in this case, any other laser irradiation trace is appropriate, considering that it is a laser irradiation trace that causes the puddle of molten Y to drain.
    [00030] With reference to FIG. 3, the operation of the S100 laser welding method will be described. In step S11, the laser welding apparatus 10 applies a laser beam from above to the upper plate 101 and the lower plate 102, superimposed together, so that the puddle of molten Y is formed on the upper plate 101 and the plate lower 102, superimposed together. In this case, it is irrelevant whether a penetration hole or a separate drop forms in the puddle of molten Y formed.
    [00031] In step S120, the laser irradiation scan by the laser welding apparatus 10 causes the flow of the puddle of molten Y formed as described above. At this point, undulation occurs in the puddle of melting Y that drains. The puddle of melt Y in which the ripple occurs is collected due to surface tension, and forms a junction portion without a penetration hole or a separate section.
    [00032] The effects of the S100 laser welding method will be described.
    [00033] In the field of welding a three-dimensional object, such as a motor vehicle body, and the like, it has been difficult to correctly control the inter-plate clearance so that the inter-plate clearance is less than or equal to , for example, 0.3 mm. On the other hand, when a motor vehicle body, or the like, is to be produced, an inter-plate clearance of about 1 mm has been permitted in practice. Therefore, it has been aimed at welding with an inter-plate clearance of about 1 mm without a decline in joint strength. According to the laser welding method S100, the top plate 101 and the bottom plate 102, with an inter-plate clearance of 1 mm, can be welded together without a decline in joint strength.
    [00034] With reference to FIGS. 4, 5A, and 5B, a S200 laser welding method will be described. The S200 laser welding method is a second embodiment of the laser welding method using the laser welding apparatus of the invention. Incidentally, the steps in FIG. 4 correspond to the steps in FIGS. 5A and 5B. In addition, FIG. 5B shows sectional views, each taken along line B-B in FIG. 5A.
    [00035] With reference to FIG. 4, a flow of an S200 laser welding method will be described. In step S210, the laser welding apparatus 10 using the laser irradiation head 13, applies a laser beam to the upper plate 101 and the lower plate 102, superimposed together, from above. At this time, the laser welding apparatus 10 scans the applied laser beam so that a region occupied by the laser irradiation trace forms a circular conformation in a flat view, whereby a puddle of molten Y is formed in the upper plate 101 and on the bottom plate 102, superimposed together. Incidentally, although in this embodiment the laser irradiation trace forms a circular conformation, it is sufficient that the shape of the laser irradiation trace is a concentric conformation, such as an elliptical conformation, etc.
    [00036] In step S220, the laser welding apparatus 10 scans the laser irradiation in order to cause flow in the puddle of molten Y formed in the upper plate 101 and in the lower plate 102. Here, an axis that extends in the vertical direction through a center of the melt pool Y in a plan view it is defined as a P axis. In step S220, the laser irradiation is scanned in order to rotate in a predetermined direction on the P axis (the direction of an arrow R in the 5A and 5B).
    [00037] With reference to FIGS. 5A and 5B, the operation of the S200 laser welding method will be described. In step S210, the laser welding apparatus 10 applies a laser beam to the upper plate 101 and the lower plate 102, superimposed together, from above, so that the puddle of molten Y, which is circular in a flat view, is formed between the upper plate 101 and the lower plate 102, superimposed together. In this case, it does not matter whether a penetration hole or a separate drop forms in the puddle of melt Y formed as described above.
    [00038] In step S220, scanning the laser irradiation by the laser welding apparatus 10 causes rotation of the puddle of molten Y formed as described above. Specifically, scanning the laser irradiation by the laser welding apparatus 10 causes the puddle of molten Y formed to flow circumferentially and be agitated. At this point, the spinning puddle of melt Y flows in a circumferential direction, so that it is formed into a cup or pestle shape.
    [00039] Simultaneously, undulation occurs in the puddle of melting Y in flow. The puddle of melt Y in which the ripple occurs is collected due to surface tension, and forms a junction portion without a penetration hole or a separate drop.
    [00040] The effects of the S200 laser welding method will be described. According to the laser welding method S200, the upper plate 101 and the lower plate 102, which have an inter-plate clearance of 1 mm between them, can be welded together without a decline in joint strength.
    [00041] With reference to FIGS. 6, 7A, and 7B, a S300 laser welding method will be described. The S300 laser welding method is a third embodiment of the laser welding method using the laser welding apparatus of the invention. Incidentally, the steps in FIG. 6 correspond to the steps in FIGS. 7A and 7B. In addition, FIG. 7B shows sectional views, each taken along line B-B in FIG. 7A.
    [00042] With reference to FIG. 6, a flow of the S300 laser welding method will be described. The flow from step S310 to step S320 is substantially the same as the flow from step S210 to step S220 in the second embodiment, and therefore will not be described.
    [00043] In step S330, the laser welding apparatus 10 sweeps the laser beam along a portion of the outer edge of the puddle of molten Y formed in a pestle shape in step S320. At this time, as in step S320, the laser irradiation is scanned in order to rotate in a predetermined direction (the direction of an arrow Rl in FIGS. 7A and 7B) on the P axis.
    [00044] With reference to FIGS. 7A and 7B, the operation of the S300 laser welding method will be described. The process of step S310 to step S320 operates in a substantially the same manner as the process of step S210 to step S220 in the second embodiment, and will not be described again.
    [00045] In step S330, scanning the laser irradiation by the laser welding apparatus 10 expands the diameter of the puddle of molten Y formed. At this time, the radial expansion of the puddle of melt Y is carried out using as a base the puddle of melt Y which drains entirely as a mass in step S320, and therefore a penetration hole does not form in the puddle of melt Y. In the case where it is attempted to form a puddle of Y melt radially expanded from the beginning, a puddle of Y melt with a larger diameter is formed from the beginning, and therefore the probability of forming a penetration hole is high. However, in step S330, the diameter of the melt puddle Y is increased by using it as a base of the melt puddle Y which flows entirely as a mass, and therefore the likelihood of a penetration hole forming is low.
    [00046] The effects of the S300 laser welding method will be described. According to the S300 laser welding method, the top plate 101 and the bottom plate 102, with an inter-plate clearance of 1 mm, can be welded together without a decline in joint strength.
    [00047] With reference to FIGS. 8, 9A, and 9B, a S400 laser welding method will be described. The S400 laser welding method is a fourth embodiment of the laser welding method using the laser welding apparatus of the invention. Incidentally, the steps in FIG. 8 correspond to the steps in FIGS. 9A and 9B. In addition, FIG. 9B shows sectional views, each taken along line B-B in FIG. 9A.
    [00048] With reference to FIG. 8, a flow of the S400 laser welding method will be described. The flow from S410 to step S420 is substantially the same as the flow from step S210 to step S220 in the second embodiment, and therefore will not be described.
    [00049] In step S430, the laser welding apparatus 10 sweeps the laser beam so that the sweep converges towards the center of the puddle of molten Y formed in a pestle shape in step S320. That is, the laser irradiation is carried out by scanning in order to converge towards the P axis. At this moment, as in step S320, the laser irradiation scanning is carried out in order to rotate in a predetermined direction (the direction of a arrow R2 in Figures 9A and 9B) on the P axis. In other words, the laser is scanned spirally on the P axis.
    [00050] With reference to FIGS. 9A and 9B, the operation of the S400 laser welding method will be described. The process of steps S410 to S420 operates in a substantially the same manner as the process of steps S210 to S220 in the second embodiment, and will not be described below.
    [00051] In step S430, scanning the laser irradiation by the laser welding apparatus 10 causes a central portion of the pool of molten Y formed to extend downwards.
    [00052] At this point, the puddle of melt Y flowing entirely as a mass in step S420 extends downwards, so that the bottom plate 102 is welded with higher resistance.
    [00053] The effects of the S400 laser welding method will be described. According to the S400 laser welding method, the top plate 101 and the bottom plate 102, which have an inter-plate clearance of 1 mm, can be welded together without a decline in joint strength.
    [00054] Although in the first to fourth preceding embodiments the laser is applied from above on the upper plate 101 and on the lower plate 102 (two steel plates) superimposed together, the invention is not limited to this construction. Even in a construction where laser is applied from above on three or more steel sheets superimposed together, substantially the same effects can be achieved.
    [00055] Although in the first to fourth embodiments the object to be welded is steel sheets, these do not limit the invention. For example, in a construction where the object to be welded is aluminum sheets, substantially the same effects can be achieved.
    [00056] Although in the first and fourth embodiments the laser is applied from above on the upper plate 101 and on the lower plate 102 superimposed together, the invention is not limited to this. Even in a construction where the laser is applied to a side surface (end surfaces) of the upper plate 101 and the lower plate 102 superimposed together, substantially the same effects can be achieved.
    [00057] Incidentally, laser scanning can be carried out by changing the laser focusing position by, for example, activating the condenser lens as in the preceding embodiments, or it can also be carried out by moving a plurality of plates relative to the laser by using templates (not shown) that retain the plurality of plates.
    [00058] That is, it is sufficient that the laser and a plurality of plates move relatively to each other so that a puddle of molten is forced to flow. However, in the case where a plurality of plates to be welded are large so that it is difficult to move the plates, it is preferable to scan the laser by changing the focusing position of the laser by, for example, driving the condenser lenses.
    [00059] In addition, examples of templates for use in the invention include a clamp that holds a plurality of plates so that the plates are fixed immobile relative to each other, a table on which a plurality of plates are placed, combinations of these templates, etc. .
    [00060] The invention has been described with reference to exemplary embodiments for illustrative purposes only. It should be understood that the description is not intended to be exhaustive, or to limit the form of the invention, and that the invention can be adapted for use in other systems and applications. The scope of the invention involves several modifications and equivalent arrangements that can be designed by a person skilled in the art.
    权利要求:
    Claims (12)
    [0001]
    1. Laser welding apparatus (10) for welding a plurality of plates superimposed together, comprising: a laser oscillator (11) that generates laser; and a condenser lens (14) that converges the laser, in which the laser welding apparatus (10) is configured to weld the plurality of plates (101, 102) superimposed together by applying the laser to the plurality of superimposed plates together in order to form a melt pool (Y) in the plurality of plates, characterized by the fact that: the laser welding device (10) is further configured to scan the laser in the melt pool with an irradiation trace in order to make with which the flow from the interior of the melt pool flows and so as to cause undulation in the melt pool which drains in order to collect the melt pool due to the surface tension generated in the melt pool.
    [0002]
    2. Laser welding apparatus according to claim 1, characterized by the fact that the laser welding apparatus (10) is configured to cause the molten puddle (Y) to flow by scanning the laser applied to the puddle of molten, activating the condenser lens (14).
    [0003]
    3. Laser welding apparatus according to claim 1 or 2, characterized by the fact that it additionally comprises a template that is operable, while retaining the plurality of plates, in which the laser welding apparatus (10) is configured to make the melt puddle flow by scanning the laser applied to the melt puddle by activating the template.
    [0004]
    Laser welding apparatus according to any one of claims 1 to 3, characterized in that the laser welding apparatus (10) is configured to cause the molten pool to flow in a predetermined direction of rotation on a predetermined axis (P) that extends through the molten pool, by scanning the laser applied to the molten pool in the direction of predetermined rotation on the predetermined axis.
    [0005]
    5. Laser welding apparatus according to claim 4, characterized by the fact that the laser welding apparatus (10) is configured to cause the molten pool to flow and widen by scanning the laser in the direction of predetermined rotation along a portion of the outer edge of the molten pool after the molten pool is driven to flow in the predetermined rotation direction about the predetermined axis.
    [0006]
    6. Laser welding apparatus according to claim 4, characterized by the fact that the laser welding apparatus (10) is configured to urge the puddle of melt to flow in the direction of predetermined rotation on the predetermined axis that extends through the melt pool and converges towards the predetermined axis by scanning the laser in the direction of predetermined rotation on the predetermined axis, so that the scan converges to the predetermined axis.
    [0007]
    7. Laser welding method, whereby a plurality of plates superimposed together is welded which comprises: laser generation by a laser oscillator (11); convergence of the laser through a condenser lens (14); formation of a puddle of melt in the plurality of plates (101, 102) superimposed together by the application of the laser the plurality of plates, characterized by scanning the laser over the puddle of molten with a trace of irradiation in order to make the interior of the puddle of melt drains and causes ripple in the puddle of melt, in order to collect the puddle of melt due to the surface tension generated by the puddle of melt.
    [0008]
    8. Laser welding method, according to claim 7, characterized by the fact that when the molten pool is forced to flow, the laser applied to the molten pool is swept by the activation of the condenser lens (14).
    [0009]
    9. Laser welding method according to claim 7 or 8, characterized by the fact that when the molten pool is driven to flow, the laser applied to the molten pool is swept by the actuation of a template that retains the plurality of plates.
    [0010]
    10. Laser welding method according to any one of claims 7 to 9, characterized by the fact that when the molten pool is forced to flow, the molten pool is forced to flow in a predetermined direction of rotation over a predetermined axis (P) that extends through the melt pool by scanning the laser applied to the melt pool in the direction of predetermined rotation on the predetermined axis.
    [0011]
    11. Laser welding method according to claim 10, characterized by the fact that when the molten pool is forced to flow, the molten pool is forced to flow and is enlarged by scanning the laser in the predetermined rotation direction along a portion of the outer edge of the melt pool after causing the melt pool to flow in the predetermined direction of rotation about the predetermined axis.
    [0012]
    12. Laser welding method, according to claim 10, characterized by the fact that when the molten pool is forced to flow, the molten pool is forced to flow in the predetermined rotation direction on the predetermined axis, so converging towards the predetermined axis by scanning the laser in the direction of predetermined rotation on the predetermined axis, so that the scan converges to the predetermined axis.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5630465Y2|1976-02-27|1981-07-20|
    CA1080434A|1976-03-19|1980-07-01|Richard Swindells|High efficiency chlorine dioxide production using hc1 as acid|
    FR2547756B1|1983-06-24|1986-06-06|Sciaky Sa|LASER BEAM POINT WELDING PROCESS AND INSTALLATION|
    FR2547757B1|1983-06-27|1986-10-17|Sciaky Sa|LASER BEAM POINT WELDING PROCESS AND INSTALLATION|
    JPS61255785A|1985-05-09|1986-11-13|Mitsubishi Electric Corp|Laser welding method|
    JP2647907B2|1988-06-14|1997-08-27|三菱電機株式会社|Spot welding method|
    JPH0699294A|1992-09-16|1994-04-12|Nisshin Steel Co Ltd|Laser beam spot welding method|
    AU4660193A|1992-09-29|1994-04-26|Bausch & Lomb Incorporated|Symmetric scanning technique for laser ablation|
    JP2836498B2|1994-09-19|1998-12-14|住友金属工業株式会社|Laser welding pipe making method|
    JP3238077B2|1996-08-28|2001-12-10|新日本製鐵株式会社|Lap laser welding method for galvanized steel sheet|
    US6040550A|1996-10-28|2000-03-21|Chang; Dale U.|Apparatus and method for laser welding the outer joints of metal bellows|
    JP3430834B2|1997-01-21|2003-07-28|スズキ株式会社|Welding method and welding apparatus using the same|
    US6231566B1|1998-08-12|2001-05-15|Katana Research, Inc.|Method for scanning a pulsed laser beam for surface ablation|
    JP2000280080A|1999-03-30|2000-10-10|Mitsubishi Heavy Ind Ltd|Method and device for laser welding|
    JP3361479B2|1999-04-30|2003-01-07|日本特殊陶業株式会社|Manufacturing method of spark plug|
    JP2001030089A|1999-07-19|2001-02-06|Sumitomo Electric Ind Ltd|Method of laser welding|
    JP2001334378A|2000-05-24|2001-12-04|Hitachi Constr Mach Co Ltd|Method of welding cast iron with laser beam|
    JP3533450B2|2000-09-25|2004-05-31|新日本製鐵株式会社|Lamination laser welding method of aluminum plated steel plate|
    WO2002066197A1|2001-02-19|2002-08-29|Toyota Jidosha Kabushiki Kaisha|Laser processing device and processing method|
    CN1139456C|2001-06-08|2004-02-25|北京工业大学|Laser welding method using auxiliary current and its auxiliary equipment|
    US7589032B2|2001-09-10|2009-09-15|Semiconductor Energy Laboratory Co., Ltd.|Laser apparatus, laser irradiation method, semiconductor manufacturing method, semiconductor device, and electronic equipment|
    FR2830477B1|2001-10-09|2004-02-06|Usinor|METHOD AND DEVICE FOR COVERING WELDING USING A HIGH ENERGY DENSITY BEAM OF TWO COATED SHEETS|
    JP4006994B2|2001-12-18|2007-11-14|株式会社リコー|Three-dimensional structure processing method, three-dimensional product manufacturing method, and three-dimensional structure|
    US20060255019A1|2002-05-24|2006-11-16|Martukanitz Richard P|Apparatus and methods for conducting laser stir welding|
    KR20050023271A|2002-05-24|2005-03-09|알코아 인코포레이티드|Laser welding with beam oscillation|
    JP2004025219A|2002-06-24|2004-01-29|Toyota Motor Corp|Laser welding equipment and laser welding method|
    US7230968B2|2003-07-10|2007-06-12|Nippon Steel Corporation|Semiconductor laser device and solid-state laser device using same|
    DE10333456A1|2003-07-22|2005-02-24|Kuka Schweissanlagen Gmbh|Method and device for laser machining of workpieces|
    US7312417B2|2003-09-19|2007-12-25|Daimlerchrysler Ag|Laser beam seam welding with prior laser spot welding|
    JP4386431B2|2004-10-12|2009-12-16|ダイハツ工業株式会社|Laser welding method|
    JP2008518785A|2004-10-29|2008-06-05|ジョンソン コントロールズ テクノロジー カンパニー|Laser welding method and laser welding apparatus|
    JP2006224134A|2005-02-17|2006-08-31|Nissan Motor Co Ltd|Structure, method, and equipment for joining different kind of metals by high energy beam|
    TWI382795B|2005-03-04|2013-01-11|Hitachi Via Mechanics Ltd|A method of opening a printed circuit board and an opening device for a printed circuit board|
    US8253062B2|2005-06-10|2012-08-28|Chrysler Group Llc|System and methodology for zero-gap welding|
    JP2007000888A|2005-06-22|2007-01-11|Nisshin Steel Co Ltd|Laser welding method|
    FR2892328B1|2005-10-21|2009-05-08|Air Liquide|LASER BEAM WELDING METHOD WITH CONTROL OF METAL VAPOR CAPILLARY FORMATION|
    JP4894025B2|2006-09-22|2012-03-07|国立大学法人大阪大学|Substance bonding method, substance bonding apparatus, and bonded body and manufacturing method thereof|
    JP2008126298A|2006-11-22|2008-06-05|Mazda Motor Corp|Laser beam welding method and its apparatus|
    DE102007006330A1|2007-02-08|2008-08-14|Robert Bosch Gmbh|Method and apparatus for laser welding|
    US20080196271A1|2007-02-20|2008-08-21|Chiang Min Chen|Slipper with hollow sole|
    DE102007038502B4|2007-08-14|2013-01-03|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.|Method for joining at least two workpieces by means of a laser beam|
    DE102007046074A1|2007-09-24|2009-04-09|Trumpf Laser- Und Systemtechnik Gmbh|Apparatus and method for laser processing|
    JP5224349B2|2008-07-15|2013-07-03|日新製鋼株式会社|Laser welding method for thin plate|
    JP2011025260A|2009-07-22|2011-02-10|Honda Motor Co Ltd|Laser lap welding method for plated steel sheet and plated steel sheet for laser lap welding|
    KR101243920B1|2010-01-07|2013-03-14|삼성디스플레이 주식회사|Laser beam irradiation apparatus for substrate sealing, substrate sealing method, and manufacturing method of organic light emitting display device using the same|
    IT1404531B1|2011-02-24|2013-11-22|Sisvel Technology Srl|PROCEDURE AND INDOOR LOCALIZATION SYSTEM FOR MOBILE TERMINALS IN A MOBILE MOBILE TELECOMMUNICATION NETWORK AND RELATIVE MOBILE TERMINAL.|
    JP2012228716A|2011-04-26|2012-11-22|Toyota Motor Corp|Laser welding apparatus and laser welding method|
    JP2012228717A|2011-04-26|2012-11-22|Toyota Motor Corp|Laser welding apparatus and laser welding method|JP5947740B2|2013-03-29|2016-07-06|トヨタ自動車株式会社|Welded part inspection device and inspection method|
    JP2015077610A|2013-10-16|2015-04-23|トヨタ自動車株式会社|Laser joining structure and laser joining method|
    US10155285B2|2014-01-10|2018-12-18|Panasonic Intellectual Property Management Co., Ltd.|Laser welding method and laser welding device|
    EP3112077B1|2014-02-25|2021-03-31|Panasonic Intellectual Property Management Co., Ltd.|Laser welding method|
    JP6032236B2|2014-04-08|2016-11-24|トヨタ自動車株式会社|Laser welding method and welded structure|
    JP6044579B2|2014-04-22|2016-12-14|トヨタ自動車株式会社|Welding method and welded structure|
    US9545693B2|2014-10-07|2017-01-17|Caterpillar Inc.|Consumable insert for welding|
    GB201502149D0|2015-02-09|2015-03-25|Spi Lasers Uk Ltd|Apparatus and method for laser welding|
    JP6149887B2|2015-04-03|2017-06-21|トヨタ自動車株式会社|Welding method|
    EP3288706A4|2015-04-30|2019-01-02|GM Global Technology Operations LLC|Hot cracking reduction in aluminum laser welding|
    EP3332904A4|2015-08-05|2018-08-22|Panasonic Intellectual Property Management Co., Ltd.|Laser welding method|
    US10118249B2|2015-10-15|2018-11-06|GM Global Technology Operations LLC|Laser beam welding with a spiral weld path having a first order of continuity|
    DE102015014060B4|2015-11-02|2018-05-09|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.|Method for joining two components in the region of a joining zone by means of at least one laser beam and method for producing a continuous joint seam|
    JP6203297B2|2016-01-12|2017-09-27|株式会社エイチワン|Laser lap welding method|
    DE102017200688A1|2016-07-08|2018-01-11|Robert Bosch Gmbh|Stator of an electric machine|
    US10675713B2|2016-08-11|2020-06-09|GM Global Technology Operations LLC|Remote laser welding of overlapping metal workpieces using helical path|
    JP6593280B2|2016-08-25|2019-10-23|トヨタ自動車株式会社|Laser welding method for flat wire|
    DE102016012225A1|2016-10-13|2017-04-27|Daimler Ag|Method for joining a plurality of overlapping component sections with a laser beam|
    JP2019000906A|2017-06-15|2019-01-10|トヨタ自動車株式会社|Lap-welding method|
    US10786872B2|2017-06-15|2020-09-29|Toyota Jidosha Kabushiki Kaisha|Welding method|
    JP6777023B2|2017-06-20|2020-10-28|トヨタ自動車株式会社|Welding method of laminated metal foil|
    CN107234340B|2017-07-20|2020-03-31|大族激光科技产业集团股份有限公司|Butt welding method of side plate and end plate for power battery module|
    JP6665140B2|2017-09-13|2020-03-13|本田技研工業株式会社|Resistance welding method and resistance welding equipment|
    JP6973172B2|2018-02-26|2021-11-24|トヨタ自動車株式会社|Joined structure|
    JP2019188436A|2018-04-25|2019-10-31|トヨタ自動車株式会社|Laser welding method|
    JP2019217524A|2018-06-19|2019-12-26|トヨタ自動車株式会社|Laser weld method and weld structure|
    CN108890132A|2018-07-25|2018-11-27|亚琛联合科技（天津）有限公司|A kind of spot welding method of laser arc swing|
    CN109719388B|2019-02-25|2021-01-08|大族激光科技产业集团股份有限公司|Processing method and system of white and bright welding spots|
    法律状态:
    2020-08-25| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-10-20| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-03-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-04-27| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/04/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011-098801|2011-04-26|
    JP2011098801A|JP5902400B2|2011-04-26|2011-04-26|LASER WELDING DEVICE, LASER WELDING METHOD, MANUFACTURING METHOD FOR STEEL SHEET LAMINATE, AND WELDING STRUCTURE BY LASER WELDING LAMINATE|
    PCT/IB2012/000785|WO2012146965A1|2011-04-26|2012-04-20|Laser welding apparatus and laser welding method|
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