-
公开(公告)号：EP3527316A1
公开(公告)日：2019-08-21
申请号：EP17860382.5
申请日：2017-10-10
发明人： FUJIWARA Junji , FURUYAMA Yuya
摘要： An arc welding method alternately generates a short-circuit state and an arc state. In the method, short circuits are generated also in the arc period. This more than doubles the total number of short circuits, which is the sum of the short circuits generated in the short circuit period and those generated in the arc period. This enables a thin plate to be arc welded at a higher speed, while reducing its burn-through.
-
公开(公告)号：EP3437784A1
公开(公告)日：2019-02-06
申请号：EP17774539.5
申请日：2017-03-22
发明人： KAWAMOTO Atsuhiro , FUJIWARA Junji
摘要： A joint structure disclosure includes: a first material; a second material, which are same-type of metal and are weldable with each other, and a different-type material that has penetrating part, is difficult to weld to the first material and second material. In the plate thickness direction in which laser light is emitted toward an emission region in the penetrating part, the plate thickness at the emission region of the first material positioned on the side on which the laser light is emitted has a predetermined size so as to correspond to a first gap. The first gap is formed at the emission region in the plate thickness direction and exists before welding. The first material and the second material are fused and bonded together via the penetrating part, by which the different-type material is compressed and fixed. As a result, the different-type material is fixed to the first material and the second material of same-type metal.
-
公开(公告)号：EP3960351A1
公开(公告)日：2022-03-02
申请号：EP20795977.6
申请日：2020-04-21
发明人： NOGUCHI Takahiro , KOWA Masaru , EGAWA Haruki , NAKAGAWA Akira , FUJIWARA Junji
IPC分类号： B23K9/073
摘要： Disclosed is an arc welding control method of controlling a welding current (Ia) in short-circuit arc welding of feeding a welding wire (3) toward a base metal (5) 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 (Ia) with a first slope (S1), a first decrease in the welding current (Ia) to a first bottom value (B 1) after executing the first increase, a second increase in the welding current (Ia) with a second slope (S2) after executing the first decrease, and a second decrease in the welding current (Ia) to a second bottom value (B2) that is smaller than the first bottom value (B1) after executing the second increase to shift a state to the arc state.
-
公开(公告)号：EP3466599A1
公开(公告)日：2019-04-10
申请号：EP17802462.6
申请日：2017-04-11
IPC分类号： B23K26/142 , B23K26/21
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.
-
公开(公告)号：EP3578290A1
公开(公告)日：2019-12-11
申请号：EP18747143.8
申请日：2018-01-23
IPC分类号： B23K26/323 , B23K9/23 , B23K10/02 , B23K26/21 , B23K26/22 , B23K26/324
摘要： A lap-joined structure including at least one similar metallic material (1,3) weldable to each other and a different material (2) different in type from the at least one similar metallic material and difficult to be welded to the similar metallic material. The different material (2) is sandwiched and fixed between the similar metallic material (1, 3). The similar metallic material (1,3) has at least one exhaust hole or exhaust groove (3a) around the weld zone where the similar metallic material (1,3) is melted and joined together. The exhaust hole or exhaust groove (3a) extends through the similar metallic material (1,3) along its thickness. Thus, the similar metallic material (1,3) and the different material (2) are fixed and joined together.
-
公开(公告)号：EP3412396A1
公开(公告)日：2018-12-12
申请号：EP17747239.6
申请日：2017-01-23
发明人： FUJIWARA Junji
摘要： 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：EP3974094A1
公开(公告)日：2022-03-30
申请号：EP20810498.4
申请日：2020-04-24
发明人： MATSUOKA Noriyuki , SATOU Shun , KOWA Masaru , NAKAGAWA Akira , FUJIWARA Junji
摘要： 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.
-
公开(公告)号：EP3782757A1
公开(公告)日：2021-02-24
申请号：EP19788969.4
申请日：2019-04-12
发明人： MATSUOKA Noriyuki , KOWA Masaru , FUJIWARA Junji
摘要： A pulse welding period Tp includes a first peak period Tp1 for supplying a first peak current Ip1 to a welding wire 18, a first base period Tb1 for supplying a base current Ib smaller than the first peak current Ip1 to the welding wire 18, a second peak period Tp2 for supplying a second peak current Ip2 to the welding wire 18 after alternately repeating the first peak period Tp1 and the first base period Tb1 (n - 1) times (n is an integer equal to or larger than 2), and a second base period Tb2 for supplying the base current Ib to the welding wire 18. The second peak current Ip2 is larger than the first peak current Ip1, and droplets are transferred from the welding wire 18 during the second peak period Tp2 or the second base period Tb2.
-
公开(公告)号：EP3498410A1
公开(公告)日：2019-06-19
申请号：EP17839343.5
申请日：2017-08-03
发明人： FUJIWARA Junji , KAWAMOTO Atsuhiro
摘要： A junction structure includes a first metallic material, a second material different in type from the first metallic material, and a welding wire as a third material similar to the first metallic material. The second material is stacked on the first material. The molten metal of the third metallic material is deposited by arc welding into the through part of the second material so as to form a flanged or tapered bead, so that the first and third metallic materials and the second material are fixed together.
-
公开(公告)号：EP3437785A1
公开(公告)日：2019-02-06
申请号：EP17775054.4
申请日：2017-03-28
IPC分类号： B23K26/21 , B23K26/323 , B23K26/324 , B29C65/16
摘要： A laser welding method includes a step of placing a third material between a first material and a second material. The first material and the second material are of metals so as to be weldable to each other, and at least one of which has a protrusion part. The third material is difficult to weld to the first material and the second material and has a through-hole part into which the protrusion part is inserted. The method also includes a step of emitting laser light from the first material side toward a region corresponding to the protrusion part under condition in which the third material is sandwiched between the first material and the second material, so that the first material and the second material are welded via the through-hole part. In the step in which the third material is sandwiched between the first material and the second material, a first gap is disposed between the protrusion part and the inner peripheral face of the through-hole part, and a second gap depending on the plate thickness of the first material in the region corresponding to the protrusion part is disposed between the first material and the second material in the region corresponding to the protrusion part.
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.015 秒)
