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公开(公告)号：EP3437784A1
公开(公告)日：2019-02-06
申请号：EP17774539.5
申请日：2017-03-22
发明人： KAWAMOTO Atsuhiro , FUJIWARA Junji
摘要： A joint structure disclosure includes: a first material; a second material, which are same-type of metal and are weldable with each other, and a different-type material that has penetrating part, is difficult to weld to the first material and second material. In the plate thickness direction in which laser light is emitted toward an emission region in the penetrating part, the plate thickness at the emission region of the first material positioned on the side on which the laser light is emitted has a predetermined size so as to correspond to a first gap. The first gap is formed at the emission region in the plate thickness direction and exists before welding. The first material and the second material are fused and bonded together via the penetrating part, by which the different-type material is compressed and fixed. As a result, the different-type material is fixed to the first material and the second material of same-type metal.
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公开(公告)号：EP3578290A1
公开(公告)日：2019-12-11
申请号：EP18747143.8
申请日：2018-01-23
IPC分类号： B23K26/323 , B23K9/23 , B23K10/02 , B23K26/21 , B23K26/22 , B23K26/324
摘要： A lap-joined structure including at least one similar metallic material (1,3) weldable to each other and a different material (2) different in type from the at least one similar metallic material and difficult to be welded to the similar metallic material. The different material (2) is sandwiched and fixed between the similar metallic material (1, 3). The similar metallic material (1,3) has at least one exhaust hole or exhaust groove (3a) around the weld zone where the similar metallic material (1,3) is melted and joined together. The exhaust hole or exhaust groove (3a) extends through the similar metallic material (1,3) along its thickness. Thus, the similar metallic material (1,3) and the different material (2) are fixed and joined together.
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公开(公告)号：EP3498410A1
公开(公告)日：2019-06-19
申请号：EP17839343.5
申请日：2017-08-03
发明人： FUJIWARA Junji , KAWAMOTO Atsuhiro
摘要： A junction structure includes a first metallic material, a second material different in type from the first metallic material, and a welding wire as a third material similar to the first metallic material. The second material is stacked on the first material. The molten metal of the third metallic material is deposited by arc welding into the through part of the second material so as to form a flanged or tapered bead, so that the first and third metallic materials and the second material are fixed together.
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公开(公告)号：EP3437785A1
公开(公告)日：2019-02-06
申请号：EP17775054.4
申请日：2017-03-28
IPC分类号： B23K26/21 , B23K26/323 , B23K26/324 , B29C65/16
摘要： A laser welding method includes a step of placing a third material between a first material and a second material. The first material and the second material are of metals so as to be weldable to each other, and at least one of which has a protrusion part. The third material is difficult to weld to the first material and the second material and has a through-hole part into which the protrusion part is inserted. The method also includes a step of emitting laser light from the first material side toward a region corresponding to the protrusion part under condition in which the third material is sandwiched between the first material and the second material, so that the first material and the second material are welded via the through-hole part. In the step in which the third material is sandwiched between the first material and the second material, a first gap is disposed between the protrusion part and the inner peripheral face of the through-hole part, and a second gap depending on the plate thickness of the first material in the region corresponding to the protrusion part is disposed between the first material and the second material in the region corresponding to the protrusion part.
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公开(公告)号：EP3466599A1
公开(公告)日：2019-04-10
申请号：EP17802462.6
申请日：2017-04-11
IPC分类号： B23K26/142 , B23K26/21
摘要： A laser welding device includes a welding head configured to emit a laser beam to a working point, a shield gas supplying nozzle configured to supply shield gas to the working point, and a high-speed air supplying nozzle configured to supply a high-speed air stream between the shield gas supplying nozzle and the welding head, the high-speed air stream having a flow rate that is larger than a flow rate of the shield gas, and being supplied in a horizontal direction directly above the shield gas supplied to the working point, or in a direction orthogonal to an emission direction of the laser beam. The high-speed air supplying nozzle is disposed in a range from 80 mm to 200 mm, both inclusive, above the working point, or in a range equal to or lower than a half of a working distance between an emission surface of the laser beam of the welding head and the working point, and supplies the high-speed air stream in a belt shape.
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公开(公告)号：EP3778101A1
公开(公告)日：2021-02-17
申请号：EP19785735.2
申请日：2019-03-19
发明人： SAKAI Toru , KAWAMOTO Atsuhiro , FUJIWARA Junji , SAKURAI Michio
摘要： A laser welding device is configured to switch an irradiation position of a measurement beam S between a position of a keyhole 37 coaxial with the optical axis of a laser beam L and a position of a weld bead 38 behind the center of an optical axis of the laser beam L in a welding direction. The laser welding device determines whether there is a gap between an upper metal plate 31 and a lower metal plate 32 based on a measured value of a recess depth measured at the position of the weld bead 38.
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公开(公告)号：EP3520948A1
公开(公告)日：2019-08-07
申请号：EP17858023.9
申请日：2017-06-22
IPC分类号： B23K9/29
摘要： To provide a compact welding torch in which a motor can be easily replaced, in which, when a motor capable of high-speed welding is used for a long time in a high current region, heat generated by the motor can be sufficiently cooled, and in which the motor can be protected from spatters or the like.
A first cooler that cools a first side surface of a motor parallel to a shaft of the motor and a second cooler that cools a second side surface of the motor different from the first side surface are included. The first cooler has a first inflow port and a first outflow port for a cooling fluid, and a first flow passage that connects the first inflow port and the first outflow port. The second cooler has a second inflow port and a second outflow port for the cooling fluid, and a second flow passage that connects the second inflow port and the second outflow port. The first outflow port and the second inflow port open in a direction crossing the shaft of the motor and are connected to each other directly or indirectly.-
公开(公告)号：EP3437777A1
公开(公告)日：2019-02-06
申请号：EP17774440.6
申请日：2017-03-17
发明人： FURUYAMA Yuya , KAWAMOTO Atsuhiro , FUJIWARA Junji , KOWA Masaru , MATSUI Kaito
摘要： In thin sheet welding, when a heat input amount relative to a sheet thickness is too large, a welding defect such as a deviation from aim due to occurrence of a strain or burn through may easily occur. When a welding current is decreased to reduce the heat input amount, there is an issue in which an arc tends to become unstable. In arc welding in which short-circuit and arcing are repeated, first heat input period (Th) and second heat input period (Tc) having a heat input amount less than that of first heat input period (Th) are periodically repeated and a welding current during an arc period in second heat input period (Tc) is decreased to extinguish the arc. This reduces the heat input amount into a welding object and suppresses burn through or a strain upon welding, while making the arc stable.
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