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公开(公告)号：US12036629B2
公开(公告)日：2024-07-16
申请号：US17019623
申请日：2020-09-14
Inventor： Atsuhiro Kawamoto , Kaito Matsui , Masaru Kowa , Takahiro Noguchi , Masashi Fujiwara
IPC: B23K9/073 , B23K9/09 , B23K9/095 , B23K9/12 , B23K9/173 , B23K103/04 , B23K103/10
CPC classification number: B23K9/073 , B23K9/0732 , B23K9/09 , B23K9/095 , B23K9/124 , B23K9/173 , B23K2103/04 , B23K2103/10
Abstract: A base material is welded by a first welding method in a case where a welding parameter related to heat input to the base material is less than a first threshold value. The base material is welded by a second welding method in a case where the welding parameter is less than a second threshold value and is more than the first threshold value. The base material is welded by a third welding method in a case where the welding parameter is more than the second threshold value. By adjusting welding conditions regardless of the thickness of the base material, a welding method suitable for the thickness of the base material is determined to provide a welding with little spatter and no meltdown of the base material.
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公开(公告)号：US11267064B2
公开(公告)日：2022-03-08
申请号：US16326698
申请日：2017-08-31
Inventor： Yuya Furuyama , Shigeki Yonemori , Atsuhiro Kawamoto , Junji Fujiwara , Noriyuki Matsuoka
Abstract: A method of controlling arc welding with a consumable electrode includes repeating the following periods in sequence: a short-circuit welding period to perform short-circuit arc welding; a pulse welding period to perform pulse welding; and a cooling period in which the welding current output is zero.
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公开(公告)号：US11052483B2
公开(公告)日：2021-07-06
申请号：US16094495
申请日：2017-04-11
Inventor： Tatsuyuki Nakagawa , Atsuhiro Kawamoto , Junji Fujiwara , Noriyuki Matsuoka , Wataru Takahashi
Abstract: 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：US10471540B2
公开(公告)日：2019-11-12
申请号：US14891215
申请日：2015-02-24
Inventor： Noriyuki Matsuoka , Yasushi Mukai , Atsuhiro Kawamoto , Junji Fujiwara , Tatsuyuki Nakagawa
IPC: B23K26/24 , B23K26/082 , B23K26/06 , B23K26/08 , B23K26/322 , B23K101/34 , B23K103/04 , B23K103/08
Abstract: A laser welding method of the present disclosure includes the step of irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece. The helical shape is a combination of a circular trajectory in which a laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part. Furthermore, first energy of the laser beam moving so as to have a component of the proceeding direction in the circular trajectory is larger than second energy of the laser beam moving so as to have a component of an opposite direction to the proceeding direction in the circular trajectory.
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公开(公告)号：US11536305B2
公开(公告)日：2022-12-27
申请号：US16479963
申请日：2018-01-23
Inventor： Junji Fujiwara , Atsuhiro Kawamoto , Tatsuyuki Nakagawa , Toru Sakai
Abstract: A junction structure includes a first material that is a metallic material, a third material that is a metallic material and is weldable to the first material, and a second material which is a nonferrous metallic material or a nonmetallic material. The second material is sandwiched and fixed between the first material and the third material by lap joining. At least one of the first material or the third material has a weld zone where the first material and the third material are melted and joined together, and at least one exhaust groove or at least one exhaust hole around the weld zone. The at least one exhaust groove or the at least one exhaust hole penetrates a thickness of the at least one of the first material or the third material.
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Patent Agency Ranking
公开(公告)号：US11376691B2
公开(公告)日：2022-07-05
申请号：US16088599
申请日：2017-03-22
Inventor： Atsuhiro Kawamoto , Junji Fujiwara
IPC: B23K26/21 , B23K26/323 , B23K26/324 , B29C65/64 , B32B15/01 , F16B5/08 , B32B15/04 , B32B5/02 , B23K26/211 , B23K26/26 , B32B3/26 , B32B15/18 , B32B3/14 , B32B3/08 , B32B5/00 , B32B15/08 , B23K26/24 , B23K33/00 , B23K103/20 , B23K101/18 , B23K103/24 , B23K103/18 , B23K103/22
Abstract: A joint structure includes: a first same-type metal member; a second same-type metal member that can be mutually welded with the first same-type metal member; and a different-type member that has a penetrating portion, is interposed between the first same-type metal member and the second same-type metal member. In the plate thickness direction of an emission region in which a laser beam is emitted toward the penetrating portion, the plate thickness at the emission region of the first same-type metal member positioned on the side on which the laser beam is emitted is a predetermined thickness corresponding to a first gap. The first same-type metal member and the second same-type metal member are fused and bonded together via the penetrating portion, and the different-type member is compressed and fixed, such that the different-type member is fixed to the first same-type metal member and the second same-type metal member.
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公开(公告)号：US10286491B2
公开(公告)日：2019-05-14
申请号：US15118630
申请日：2015-02-23
Inventor： Tatsuyuki Nakagawa , Yasushi Mukai , Atsuhiro Kawamoto , Junji Fujiwara , Noriyuki Matsuoka
IPC: B23K26/244 , B23K26/082 , B23K26/06 , B23K26/08 , B23K26/22
Abstract: A laser welding method of the present disclosure has a first step and a second step. In the first step, a first workpiece and a second workpiece are overlaid in a first machining region. In the second step, the first workpiece and the second workpiece are irradiated with laser beam in the first machining region while the laser beam is moved in a spiral path. Moreover, in the second step, the first workpiece and the second workpiece are melted by irradiation of the laser beam to form a liquid phase portion. Furthermore, in the second step, the laser beam is moved so that the liquid phase portion is not irradiated with the laser beam again.
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公开(公告)号：US10207364B2
公开(公告)日：2019-02-19
申请号：US15023679
申请日：2014-11-04
Inventor： Atsuhiro Kawamoto , Yasushi Mukai , Junji Fujiwara , Tatsuyuki Nakagawa , Tatsuya Ikeda
IPC: B23K26/062 , B23K26/21 , B23K26/073 , B23K26/06 , B23K26/08 , B23K26/26 , B23K26/242 , B23K26/244
Abstract: A method for determining a laser welding condition of the present disclosure includes a first step, a second step, and a third step. In the first step, workpiece information indicating characteristics of a workpiece is input. In the second step, laser information indicating characteristics of laser light is input. In the third step, a first welding condition is calculated based on the workpiece information and the laser information, and then displayed. The first welding condition is any one of a recommended laser power of the laser light, a recommended welding speed, a recommended welding pattern, an estimated strength of a welded portion, and an estimated weld depth of the welded portion. Furthermore, the workpiece information includes a joint shape of the workpiece. Thus, an optimum weld condition can be set while considering a shape of a joint in welding.
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公开(公告)号：US09186744B2
公开(公告)日：2015-11-17
申请号：US14679783
申请日：2015-04-06
Inventor： Yukinori Hirota , Atsuhiro Kawamoto , Kaito Matsui
CPC classification number: B23K9/1062 , B23K9/0953 , B23K9/124
Abstract: A method to determine welding conditions includes relational expressions or tables about various parameters for setting welding conditions. The method can determine and display the recommended values for the welding conditions which are suitable for the information about the object to be welded and the information about the welding method set by the operator. The welding conditions include a welding current, a welding voltage, a wire feed speed, a welding speed, and a leg length. Furthermore, if the operator changes the recommended value for a welding condition to a new value, the method can determine new recommended values for the other welding conditions compatible with the new value and display the new recommended values.
Abstract translation: 确定焊接条件的方法包括关于设置焊接条件的各种参数的关系表达式或表格。 该方法可以确定和显示适用于有关待焊接物体的信息的焊接条件的推荐值和操作者设置的焊接方法的信息。 焊接条件包括焊接电流，焊接电压，送丝速度，焊接速度和腿部长度。 此外，如果操作员将焊接条件的推荐值更改为新值，则该方法可以确定与新值兼容的其他焊接条件的新推荐值，并显示新的推荐值。
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公开(公告)号：US11014186B2
公开(公告)日：2021-05-25
申请号：US15023685
申请日：2015-02-02
Inventor： Kaito Matsui , Atsuhiro Kawamoto , Junji Fujiwara , Akira Nakagawa
Abstract: An arc welding method preforms reciprocating wire feed so as to alternately perform forward feed and reverse feed. The arc welding method includes a normal arc welding step, a normal short circuit welding step, and an abnormal arc welding step. In the abnormal arc welding step, a short circuit state occurs at a second time point, which is before a lapse of a second period from a first time point at which an arc state occurs. Further, in the abnormal arc welding step, the reciprocating wire feed continues until a third time point after a lapse of a first period from the second time point. At the third time point, the reciprocating wire feed is stopped and the abnormal arc welding step is completed. From the third time point, the welding wire is decelerated and the reciprocating wire feed is restarted.
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