-
公开(公告)号：US20240375211A1
公开(公告)日：2024-11-14
申请号：US18781168
申请日：2024-07-23
Inventor： Tatsuyuki NAKAGAWA , Atsuhiro KAWAMOTO , Junji FUJIWARA , Michio SAKURAI
IPC: B23K26/06
Abstract: A transmission fiber includes a first core and a second core. The second core is provided on the outer periphery of the first core. In a first step of a laser termination process, a first laser beam is emitted from the second core, and a second laser beam is emitted from the first core. In a second step, the output power of the second laser beam is gradually reduced while a position at which the first laser beam and the second laser beam are emitted to a workpiece is moved in a laser processing direction. In a third step, the output of the second laser beam is stopped while the first laser beam is emitted from the second core.
-
公开(公告)号：US20230041907A1
公开(公告)日：2023-02-09
申请号：US17968008
申请日：2022-10-18
Inventor： Takahiro NOGUCHI , Akira NAKAGAWA , Junji FUJIWARA
Abstract: DC arc welding is performed by alternating a short-circuit period and an arc period. The arc period includes first to fourth periods. A welding current is raised to a first current value in the first period, lowered to a second current value with a time slope in the second period, kept at the second current value in the third period, and raised to a third current value then kept at the value in the fourth period. A wire feeding speed is constant throughout the short-circuit period and the arc period. In the second period, a welding output is under constant voltage control. In the third period and the fourth period, the welding output is under constant current control of the welding output.
-
公开(公告)号：US20220063009A1
公开(公告)日：2022-03-03
申请号：US17505098
申请日：2021-10-19
Inventor： Takahiro NOGUCHI , Masaru KOWA , Haruki EGAWA , Akira NAKAGAWA , Junji FUJIWARA
Abstract: Disclosed is an arc welding control method of controlling a welding current in short-circuit arc welding of feeding a welding wire toward a base metal and alternating a short-circuit state and an arc state. The arc welding control method includes: executing, in the short-circuit state, a first increase in the welding current with a first slope, a first decrease in the welding current to a first bottom value after executing the first increase, a second increase in the welding current with a second slope after executing the first decrease, and a second decrease in the welding current to a second bottom value that is smaller than the first bottom value after executing the second increase to shift a state to the arc state.
-
公开(公告)号：US20210331264A1
公开(公告)日：2021-10-28
申请号：US17370208
申请日：2021-07-08
Inventor： Junji FUJIWARA
Abstract: A pulse arc welding device is controlled so as to alternately repeat a peak current period in which a welding current is a peak current and a base current period in which the welding current is a base current smaller than the peak current, feed a welding wire to an object at a feeding speed while the welding current flows through the welding wire, generate an arc between the welding wire and the object, and weld the object. So as to keep an arc length of the arc to be constant, in the base current period, the feeding speed is set to a first feeding speed and, in the peak current period, the feeding speed is set to a second feeding speed which is larger than the first feeding speed and corresponds to the first feeding speed. By this method, good welding quality with reduced spattering and suppressed undercut can be obtained.
-
公开(公告)号：US20210031293A1
公开(公告)日：2021-02-04
申请号：US17072859
申请日：2020-10-16
Inventor： Yuya FURUYAMA , Junji FUJIWARA
Abstract: Forward feeding for feeding a welding wire in a direction of a workpiece and backward feeding for feeding in an opposite direction to the forward feeding are alternately performed, and the welding wire is fed at a wire feeding speed cyclically changed in a predetermined cycle and at a predetermined amplitude to perform welding by repeating an arc period and a short-circuit period. Provided during forward feeding, stopping feeding of the welding wire from a time of an elapse of a half cycle of a change of the wire feeding speed to an elapse of a first feeding stop period, and feeding the welding wire forward at a first feeding speed from an elapse of the first feeding stop period to an elapse of a predetermined period. The welding wire is fed backward after the elapse of the predetermined period.
-
Patent Agency Ranking
公开(公告)号：US20220170494A1
公开(公告)日：2022-06-02
申请号：US17671841
申请日：2022-02-15
Inventor： Junji FUJIWARA , Tatsuyuki NAKAGAWA
Abstract: A second member has a through-portion penetrating toward a first member. An overlapped surface of the second member with the first member includes a recess. The recess is recessed so as to surround an entire periphery of the through-portion. The recess is provided with a sealing material. The sealing material closes a gap between overlapped surfaces of the first member and the second member.
-
公开(公告)号：US20220168836A1
公开(公告)日：2022-06-02
申请号：US17671817
申请日：2022-02-15
Inventor： Junji FUJIWARA , Tatsuyuki NAKAGAWA
Abstract: A second member has a through-portion penetrating toward a first member. An overlapped surface of the second member with the first member includes a recess. The recess is recessed so as to surround an entire periphery of the through-portion. A sealing material is injected into the recess from an injection hole to close a gap between overlapped surfaces of the first member and the second member.
-
公开(公告)号：US20200376586A1
公开(公告)日：2020-12-03
申请号：US16984395
申请日：2020-08-04
Inventor： Junji FUJIWARA
Abstract: A welding tip includes a tip body having a wire insertion bore along a central axis and a leaf spring configured to press a welding wire onto a feeding point disposed on an inner surface of the wire insertion bore. The tip body 1a has an aperture on an outer circumferential surface on the distal end side. The leaf spring has a first end that is a free end disposed on the distal end side of the tip body and a second end fixed to the tip body. The aperture includes a first aperture accommodating the leaf spring and second apertures disposed in communication with the first aperture and configured to discharge wear particles created during welding to the outside.
-
公开(公告)号：US20190275603A1
公开(公告)日：2019-09-12
申请号：US16426202
申请日：2019-05-30
Inventor： Junji FUJIWARA , Atsuhiro KAWAMOTO , Masaru KOWA
Abstract: Disclosed is a method for controlling arc welding where an arc is generated between a welding wire as a consumable electrode and an object to be welded. The method includes: keeping a wire feed speed at a predetermined constant speed in a steady-state welding period; and at a time point when welding termination is ordered, either switching the wire feed speed from the predetermined constant speed to a wire feed speed at which the welding wire is fed in alternating forward and backward directions, or decreasing the wire feed speed from the predetermined constant speed with time, and then switching the wire feed speed to the wire feed speed at which the welding wire is fed in alternating forward and backward directions at a time point when a predetermined time period has passed since when welding termination was ordered.
-
20.发明申请公开(公告)号：US20180126491A1
公开(公告)日：2018-05-10
申请号：US15564207
申请日：2016-05-18
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.
-
-
-
-
-
-
-
-
-
Search Results
21
records
(took 0.016 seconds)
