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公开(公告)号：US20220055135A1
公开(公告)日：2022-02-24
申请号：US17520770
申请日：2021-11-08
Inventor： SHUN SATOU , NORIYUKI MATSUOKA , MASARU KOWA , AKIRA NAKAGAWA , JUNJI FUJIWARA
Abstract: Provided is an arc welding device that performs welding by alternately repeating a short-circuit period provided with a short-circuit state in which a welding wire and a base material are short-circuited, and an arc period provided with an arc state in which an arc is generated between the welding wire and the base material. A calculation unit calculates an integrated power value by integrating power supplied to the welding wire within a predetermined period, after the welding wire is short-circuited. A controller reduces a welding current to be supplied to welding wire when the integrated power value is larger than a predetermined threshold.
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公开(公告)号：US20220055134A1
公开(公告)日：2022-02-24
申请号：US17520767
申请日：2021-11-08
Inventor： NORIYUKI MATSUOKA , SHUN SATOU , MASARU KOWA , AKIRA NAKAGAWA , JUNJI FUJIWARA
Abstract: Arc welding, in which a welding wire serving as a consumable electrode is fed toward a base material and a welding current alternately including a peak current and a base current is caused to flow through the welding wire and the base material, is performed such that after a short-circuit between the welding wire and the base material is detected, a feeding speed of the welding wire is changed from a first feeding speed to a second feeding speed that is on a negative side from the first feeding speed when a speed in a direction in which the welding wire is fed toward the base material is defined as positive.
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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.
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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.
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公开(公告)号：US20200316703A1
公开(公告)日：2020-10-08
申请号：US16909541
申请日：2020-06-23
Inventor： NORIYUKI MATSUOKA , MASARU KOWA , TAKAMICHI KOMATSU , KIMIYA SATO
Abstract: A plurality of scaly beads is formed and arranged continuously on a base material in welding cycle C that is a sum of arc ON period A during which welding current I flows to a welding wire and arc OFF period B during which welding current I does not flow to the welding wire. This arc welding control method includes: an initial condition setting step of setting initial values of welding conditions for arc-welding the base material; and a scaly bead formation step of forming the plurality of scaly beads in a predetermined welding section of the base material while moving the welding wire at welding speed Vw in the predetermined welding section of the base material. The welding conditions include arc ON period A and arc OFF period B, and further include at least one of welding current I, welding speed Vw, and interval G of the beads. The arc welding control method further includes a welding condition change step of determining whether there is necessity to change the initial value based on a predetermined finish condition for the scaly beads and changing at least one of a plurality of welding parameters to satisfy the predetermined finish condition.
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Patent Agency Ranking
公开(公告)号：US20190176257A1
公开(公告)日：2019-06-13
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：US20170203388A1
公开(公告)日：2017-07-20
申请号：US15326400
申请日：2015-07-09
Inventor： NORIYUKI MATSUOKA , YASUSHI MUKAI , ATSUHIRO KAWAMOTO , JUNJI FUJIWARA
IPC: B23K26/064 , G05B19/19 , B23K26/08
CPC classification number: B23K26/064 , B23K26/0643 , B23K26/0648 , B23K26/0665 , B23K26/08 , B23K26/0884 , B23K26/0892 , B23K26/10 , B23K2101/006 , G05B19/19 , G05B2219/45104
Abstract: A laser machining system includes a laser oscillator, a laser machining head, and a reflection unit. The laser oscillator outputs laser light. The laser machining head, which includes a first optical member for collecting the laser light, emits the collected laser light. The reflection unit, which includes a reflective member for reflecting the laser light emitted from the laser machining head, radiates the reflected laser light onto a work.
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公开(公告)号：US20150096965A1
公开(公告)日：2015-04-09
申请号：US14569906
申请日：2014-12-15
Inventor： ATSUHIRO KAWAMOTO , JUNJI FUJIWARA , YUKINORI HIROTA , NORIYUKI MATSUOKA , KAITO MATSUI
Abstract: As a conventional problem, welding on surface-treated material, such as a zinc-coated steel plate, considerably generates air holes including blowholes and also generates lots of spatters. Present invention provides a method of controlling arc welding performed in a manner that a short-circuit period, in which a short circuit is generated between a welding wire and an object to be welded, and an arc period, in which an arc is generated after release of the short circuit, are repeated alternately. According to the method, welding current is increased from an arc-regeneration-before current to a first welding current at a detection of release of the short circuit such that an increase gradient of the welding current becomes not less than 750 A/msec. This suppresses generation of air holes and spatters in welding work on a surface-treated material, such as a zinc-coated steel plate.
Abstract translation: 作为常规问题，在诸如镀锌钢板的表面处理材料上的焊接显着地产生包括气孔的气孔并且还产生大量的飞溅物。 本发明提供了一种控制电弧焊接的方法，该方法是在焊丝和被焊接物体之间产生短路的短路时段和在其中产生电弧的电弧周期之后进行的电弧 释放短路，交替重复。 根据该方法，在检测出短路的检测时焊接电流从电弧再生前电流增加到第一焊接电流，焊接电流的增加梯度变得不小于750A / ms。 这样可以抑制在诸如镀锌钢板的表面处理材料上的焊接作业中产生气孔和飞溅物。
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公开(公告)号：US20220055136A1
公开(公告)日：2022-02-24
申请号：US17520774
申请日：2021-11-08
Inventor： NORIYUKI MATSUOKA , SHUN SATOU , MASARU KOWA , AKIRA NAKAGAWA , JUNJI FUJIWARA
Abstract: In arc welding in which a welding wire serving as a consumable electrode is fed toward a base material and a welding current is caused to flow through the welding wire and the base material to alternately repeat a reverse polarity period and a positive polarity period, after a short circuit between the welding wire and the base material is detected, a feeding speed of the welding wire is changed from a first feeding speed to a second feeding speed on a negative side of the first feeding speed when a speed in a direction toward the base material is defined as positive.
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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.
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