公开(公告)号：US20190076962A1

公开(公告)日：2019-03-14

申请号：US16088617

申请日：2017-03-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Atsuhiro KAWAMOTO ,  Junji FUJIWARA ,  Yasushi MUKAI ,  Hitoshi NISHIMURA

IPC: B23K26/21 ,  B23K26/323 ,  B23K26/324 ,  B29C65/16 ,  B23K11/30

Abstract: A laser welding method according to the present disclosure includes a step in which a third material is interposed between a first material and a second material, which are made of the same type of metal so as to be weldable to one another, and at least one of which is provided with a protruding portion, wherein the third material is difficult to weld to the first material and the second material and has a through-hole portion into which the protruding portion is inserted. The method also includes a step in which, when the third material is interposed between the first material and the second material, a region corresponding to the protruding portion is irradiated with a laser beam from the first material side, and the first material and the second material are welded via the through-hole portion. In the step in which the third material is interposed between the first material and the second material, a first gap is provided between the protruding portion and the inner peripheral face of the through-hole portion, and a second gap corresponding to the plate thickness of the first material is provided between the first material and the second material in the region corresponding to the protruding portion.

公开(公告)号：US20210388859A1

公开(公告)日：2021-12-16

申请号：US17459377

申请日：2021-08-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junji FUJIWARA ,  Atsuhiro KAWAMOTO ,  Hitoshi NISHIMURA ,  Yasushi MUKAI ,  Shigeki YONEMORI

IPC: F16B5/08 ,  B23K9/02 ,  B23K9/167 ,  B23K10/02 ,  B23K9/173

Abstract: A joint structure includes a first metallic material having a first projection, a second metallic material similar to and weldable to the first metallic material, and a different material having a first penetrating part and sandwiched between the first and second metallic materials, the different material being difficult to weld to the first and second metallic materials. The first projection is smaller than the first penetrating part and is spaced from the rim of the first penetrating part. The first projection is positioned in the first penetrating part and spaced from the second metallic material by a gap. The gap has a size of a predetermined percentage of the thickness of the first projection to which arc welding is applied. The first and second metallic materials are melted and joined together inside the first penetrating part to compress and fix the different material, so all three are fixed together.

公开(公告)号：US20170355035A1

公开(公告)日：2017-12-14

申请号：US15687850

申请日：2017-08-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junji FUJIWARA ,  Yasushi MUKAI ,  Atsuhiro KAWAMOTO

IPC: B23K9/095 ,  B23K9/073 ,  B23K9/09 ,  B23K9/12

CPC classification number: B23K9/095 ,  B23K9/073 ,  B23K9/0732 ,  B23K9/09 ,  B23K9/124

Abstract: An arc-welding method in welding by repeating a short circuit and an arc. When the sign of opening of the short circuit is detected, the welding current is reduced from a first current value at the detection of the sign to a second current value, which is lower than the first current value. When the opening of the short circuit is detected, a pulse current having a peak value higher than the first current value is supplied at a plurality of times in the arc period. This suppresses porosities and spatters when galvanized steel sheets are welded.

公开(公告)号：US20180126491A1

公开(公告)日：2018-05-10

申请号：US15564207

申请日：2016-05-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuyuki NAKAGAWA ,  Yasushi MUKAI ,  Atsuhiro KAWAMOTO ,  Junji FUJIWARA ,  Noriyuki MATSUOKA

IPC: B23K26/082 ,  B23K26/22 ,  B23K26/00 ,  B23K26/06

CPC classification number: B23K26/082 ,  B23K26/0626 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0884 ,  B23K26/22 ,  B23K26/244 ,  B23K26/354 ,  B23K2103/04

Abstract: A welding target is irradiated with a laser beam so as to form a beam spot that moves relatively with respect to the welding target along a locus having a spiral shape rotating around a rotation center moving in a welding direction. The welding target is welded using the laser beam irradiated with. While the welding target is irradiated with the laser beam, the welding target is irradiated with the laser beam based on an interval coefficient which is a value indicating an overlapping degree of the locus having the spiral shape in the welding direction.

公开(公告)号：US20170001261A1

公开(公告)日：2017-01-05

申请号：US15107347

申请日：2014-12-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junji FUJIWARA ,  Yasushi MUKAI ,  Atsuhiro KAWAMOTO ,  Tatsuyuki NAKAGAWA ,  Noriyuki MATSUOKA

IPC: B23K26/322 ,  B23K26/00 ,  B25J11/00 ,  B23K26/244

CPC classification number: B23K26/322 ,  B23K26/0006 ,  B23K26/082 ,  B23K26/22 ,  B23K26/244 ,  B23K2101/006 ,  B23K2101/34 ,  B23K2103/04 ,  B23K2103/08 ,  B25J11/005 ,  G05B2219/45135

Abstract: A laser welding method of the present disclosure includes a first step, a second step, and a third step. In the first step, a first workpiece and a second workpiece are stacked on each other. Each of the first workpiece and the second workpiece has a surface coated with a first material and is made of a second material, which is different from the first material. In the second step, a first region in which the first workpiece and the second workpiece are stacked on each other is irradiated with a laser beam so that the laser beam penetrates both the first workpiece and the second workpiece. In the third step, a second region including the first region is irradiated with a laser beam in a spiral fashion.

Abstract translation: 本公开的激光焊接方法包括第一步骤，第二步骤和第三步骤。 在第一步骤中，第一工件和第二工件彼此堆叠。 第一工件和第二工件中的每一个具有涂覆有第一材料的表面，并且由与第一材料不同的第二材料制成。 在第二步骤中，用激光束照射其中第一工件和第二工件彼此堆叠的第一区域，使得激光束穿过第一工件和第二工件。 在第三步骤中，以螺旋方式用激光束照射包括第一区域的第二区域。