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公开(公告)号：US12121999B2
公开(公告)日：2024-10-22
申请号：US17072648
申请日：2020-10-16
发明人： Noriyuki Matsuoka , Masaru Kowa , Junji Fujiwara
IPC分类号： B23K9/09 , B23K9/073 , B23K9/095 , B23K9/12 , B23K9/16 , B23K9/173 , B23K9/23 , B23K35/38 , B23K103/10
CPC分类号： B23K9/093 , B23K9/073 , B23K9/095 , B23K9/125 , B23K9/164 , B23K9/173 , B23K9/23 , B23K35/383 , B23K2103/10
摘要： A pulse welding period includes a first peak period for supplying a first peak current to a welding wire, a first base period for supplying a base current smaller than the first peak current to the welding wire, a second peak period for supplying a second peak current to the welding wire after alternately repeating the first peak period and the first base period (n−1) times (n is an integer equal to or larger than 2), and a second base period for supplying the base current to the welding wire. The second peak current is larger than the first peak current, and droplets are transferred from the welding wire during the second peak period or the second base period.
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2.发明授权公开(公告)号：US10807191B2
公开(公告)日：2020-10-20
申请号：US15564207
申请日：2016-05-18
IPC分类号： B23K26/08 , B23K26/082 , B23K26/354 , B23K26/244 , B23K26/06 , B23K26/22 , B23K103/04
摘要： 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.
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公开(公告)号：US10518348B2
公开(公告)日：2019-12-31
申请号：US14220414
申请日：2014-03-20
发明人： Noriyuki Matsuoka , Yukinori Hirota , Atsuhiro Kawamoto , Junji Fujiwara , Masaru Kowa , Akira Nakagawa
摘要： In arc welding, determining a current value to be high in an early stage of the arc period is effective in reducing spatters caused by feeble short circuit in the arc period. In that case, to sharply decrease the voltage that has increased with increase in current, an inductance value of a reactor has to be kept small. However, a small inductance value causes a problem—weakness against disturbance. The present invention provides an arc welding control method that performs arc welding while repeating the short-circuit period and the arc period. According to the method, changing an inductance value relating to welding output in the arc period offers stable arc welding with fewer spatters and insusceptibility to disturbance.
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公开(公告)号：US10384307B2
公开(公告)日：2019-08-20
申请号：US15326400
申请日：2015-07-09
IPC分类号： B23K26/06 , B23K26/08 , B23K26/10 , G05B19/19 , B23K101/00 , B23K26/064
摘要： 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：US11267064B2
公开(公告)日：2022-03-08
申请号：US16326698
申请日：2017-08-31
摘要： 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
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：US10471540B2
公开(公告)日：2019-11-12
申请号：US14891215
申请日：2015-02-24
IPC分类号： B23K26/24 , B23K26/082 , B23K26/06 , B23K26/08 , B23K26/322 , B23K101/34 , B23K103/04 , B23K103/08
摘要： 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：US10850354B2
公开(公告)日：2020-12-01
申请号：US15569850
申请日：2016-05-24
IPC分类号： B23K26/57 , B23K26/22 , B23K26/082 , B23K26/322 , B23K26/08 , B23K26/244 , B23K26/21 , B23K101/18 , B23K103/04 , B23K101/00 , B23K101/34
摘要： 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：US10413987B2
公开(公告)日：2019-09-17
申请号：US15518320
申请日：2015-10-20
摘要： In controlling an arc welding of consumable electrode type in which pulse welding and short-circuit welding alternately repeat, forward feeding and backward feeding of a welding electrode periodically repeat in a short-circuit welding period. The forward feeding of the welding electrode starts when a welding current is smaller than a base current immediately before a pulse period ends.
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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
IPC分类号： B23K26/244 , B23K26/082 , B23K26/06 , B23K26/08 , B23K26/22
摘要： 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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