-
公开(公告)号：US20190084068A1
公开(公告)日：2019-03-21
申请号：US16086653
申请日：2017-03-17
Inventor： YUYA FURUYAMA , ATSUHIRO KAWAMOTO , JUNJI FUJIWARA , MASARU KOWA , KAITO MATSUI
Abstract: 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.
-
公开(公告)号：US20190070687A1
公开(公告)日：2019-03-07
申请号：US16086658
申请日：2017-03-17
Inventor： YUYA FURUYAMA , ATSUHIRO KAWAMOTO , JUNJI FUJIWARA , MASARU KOWA , KAITO MATSUI
Abstract: 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 that repeats short-circuit and arcing, 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. This reduces the heat input amount into a welding object and suppresses burn through and a strain upon welding while making the arc stable.
-
公开(公告)号：US20180221989A1
公开(公告)日：2018-08-09
申请号：US15745726
申请日：2016-08-02
Inventor： NORIYUKI MATSUOKA , ATSUHIRO KAWAMOTO , JUNJI FUJIWARA , TATSUYUKI NAKAGAWA
IPC: B23K26/082 , B23K26/21 , B23K26/32 , B23K26/08 , B23K26/02
CPC classification number: B23K26/082 , B23K26/02 , B23K26/0626 , B23K26/0876 , B23K26/21 , B23K26/244 , B23K26/32
Abstract: The laser welding method according to the present disclosure has a first step for forming a weld bead by irradiating an object to be welded with a laser beam along a first helical trajectory around a first center of rotation moving in a welding direction, and a second step for irradiating the object to be welded with a laser beam along a second helical trajectory around a second center of rotation moving in the welding direction. A diameter of rotation of the laser beam in the first step is larger than a diameter of rotation of the laser beam in the second step.
-
公开(公告)号：US20180117707A1
公开(公告)日：2018-05-03
申请号：US15569850
申请日：2016-05-24
Inventor： JUNJI FUJIWARA , ATSUHIRO KAWAMOTO , TATSUYUKI NAKAGAWA , NORIYUKI MATSUOKA
CPC classification number: B23K26/57 , B23K26/082 , B23K26/0884 , B23K26/21 , B23K26/22 , B23K26/244 , B23K26/322 , B23K2101/006 , B23K2101/18 , B23K2101/34 , B23K2103/04
Abstract: A laser welding control method according to the present disclosure includes: a first step of causing a first steel plate having a protrusion and a second steel plate to overlap so that a tip of the protrusion provided on the first steel plate makes contact with the second steel plate; and a second step of irradiating the protrusion with laser light in an irradiation pattern having a size larger than a size of the protrusion in plan view after the first step. At least one of a surface of the first steel plate that faces the second steel plate and a surface of the second steel plate that faces the first steel plate is plated.
-
公开(公告)号：US20170144249A1
公开(公告)日：2017-05-25
申请号：US15300313
申请日：2015-04-08
Inventor： JUNJI FUJIWARA , ATSUHIRO KAWAMOTO
Abstract: A laser welding method of the present disclosure includes a first step and a second step. In the first step, a first end of a first workpiece is positioned such that the first end of the first workpiece is overlapped on a second end of a second workpiece to form a corner joint. In the second step, the first end forming the corner joint is irradiated from above with a laser beam. Additionally, the first end is positioned to protrude relative to the second workpiece in the first step.
-
Patent Agency Ranking
公开(公告)号：US20160346864A1
公开(公告)日：2016-12-01
申请号：US15023685
申请日：2015-02-02
Inventor： KAITO MATSUI , ATSUHIRO KAWAMOTO , JUNJI FUJIWARA , AKIRA NAKAGAWA
IPC: B23K9/12
CPC classification number: B23K9/125 , B23K9/0732 , B23K9/092 , B23K9/0953 , B23K9/124 , B23K9/173
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.
Abstract translation: 电弧焊接方法预先进行往复送丝，以交替地执行向前进给和反向进给。 电弧焊接方法包括正常电弧焊接步骤，正常短路焊接步骤和异常电弧焊接步骤。 在异常电弧焊接步骤中，在从发生电弧状态的第一时间点开始的第二时间段之前的第二时间点发生短路状态。 此外，在异常电弧焊接步骤中，从第二时间点开始经过第一时间段之后，往复送丝继续进行到第三时间点。 在第三时刻，往复送丝停止，异常电弧焊步骤完成。 从第三时间点开始，焊丝减速，往复送丝重新启动。
-
17.发明申请公开(公告)号：US20160207142A1
公开(公告)日：2016-07-21
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
CPC classification number: B23K26/062 , B23K26/0626 , B23K26/073 , B23K26/0884 , B23K26/21 , B23K26/242 , B23K26/244 , B23K26/26
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.
Abstract translation: 本公开的激光焊接条件的确定方法包括第一步骤，第二步骤和第三步骤。 在第一步骤中，输入表示工件特性的工件信息。 在第二步骤中，输入表示激光的特性的激光信息。 在第三步骤中，基于工件信息和激光信息计算第一焊接条件，然后显示。 第一焊接条件是激光的推荐激光功率，推荐焊接速度，推荐焊接图案，焊接部分的估计强度和焊接部分的估计焊接深度中的任一个。 此外，工件信息包括工件的接头形状。 因此，可以考虑焊接中的接头的形状来设定最佳的焊接条件。
-
公开(公告)号：US20190210138A1
公开(公告)日：2019-07-11
申请号：US16328298
申请日：2017-06-22
Inventor： YOICHI FUKUMITSU , TAKASHI NAGAI , ATSUHIRO KAWAMOTO , KAITO MATSUI
IPC: B23K9/28
CPC classification number: B23K9/285 , B23K9/133 , B23K9/29 , B23K9/32 , H02K5/08 , H02K5/20 , H02K9/19
Abstract: 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：US20190118291A1
公开(公告)日：2019-04-25
申请号：US16094495
申请日：2017-04-11
Inventor： TATSUYUKI NAKAGAWA , ATSUHIRO KAWAMOTO , JUNJI FUJIWARA , NORIYUKI MATSUOKA , WATARU TAKAHASHI
IPC: B23K26/142 , B23K26/21 , B23K26/14 , B23K26/06 , B23K26/16
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.
-
公开(公告)号：US20190047087A1
公开(公告)日：2019-02-14
申请号：US16086996
申请日：2017-03-28
Inventor： ATSUHIRO KAWAMOTO , JUNJI FUJIWARA , SHIGEKI YONEMORI
IPC: B23K26/21 , B23K26/323 , B23K26/324 , B29C65/16
Abstract: A joint structure includes a first material (1), a second material (2) weldable to the first material, and a third material (3) at least a portion of which being sandwiched between the first material and the second material, having a through opening portion at the sandwiched portion, and including a material that is difficult to be welded to both the first material and the second material, the first material and the second material welded the via through opening portion. At least one of the first material and the second material is provided with a protrusion (14) inserted in the through opening portion. A first gap (4) is provided between an inner peripheral surface of the through opening portion and the protrusion. A second gap (5) is provided between the first material and the second material, the second gap having a size depending on a plate thickness of the first material in a region corresponding to the protrusion. Under a condition in which the second gap has a size of greater than or equal to 0.1 mm but less than or equal to 40% of the plate thickness of the first material in the region, the first material and the second material are welded by emitting a laser beam from a side on which the first material is disposed.
-
-
-
-
-
-
-
-
-
Search Results
24
records
(took 0.02 seconds)
