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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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公开(公告)号：US20170232542A1
公开(公告)日：2017-08-17
申请号：US15518496
申请日：2015-11-02
Inventor： KAITO MATSUI , ATSUHIRO KAWAMOTO , TAKAHIRO NOGUCHI , MASARU KOWA
Abstract: In control applying a gradient to a command voltage value during an arc period, although stable welding can be performed even in a case where a protrusion length of a welding wire becomes long, when the disturbance such as sudden change in the protrusion length is generated, a current waveform of the arc period is undershot, the short circuit period is disturbed, and it took time to return to the stable state, and the amount of sputter generation is also increased. Therefore, it is possible to suppress a change in current such as undershoot or the like when the disturbance is generated, stabilize short circuit cycle, perform welding with a strong resistance to disturbance and a small amount of sputter generation by changing an inductance value a plurality of times during the arc period.
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公开(公告)号：US20150112480A1
公开(公告)日：2015-04-23
申请号：US14583297
申请日：2014-12-26
Inventor： HIROYUKI NAKATA , ATSUMI HASHIMOTO , MASARU KOWA , YASUYOSHI HONUCHI
CPC classification number: B25J9/1674 , B25J9/1676 , B25J19/06 , G05B2219/37622 , G05B2219/37624 , G06F17/11 , Y10S901/49
Abstract: In sensor-less collision detection of a robot, a conventional method for displaying abnormality of the robot makes an abnormality display of “collision detected” when a collision is erroneously detected, and does not clarify the situations under which the collision has been erroneously detected. In a method for displaying abnormality of a robot, when a collision of the robot is detected and the collision detection is displayed, at least one abnormality display is selected from a plurality of abnormality detection items different from collision detection. This can offer information useful for the user to understand the situations at occurrence of the erroneous collision detection.
Abstract translation: 在机器人的无传感器碰撞检测中，用于显示机器人异常的常规方法在错误检测到碰撞时发生“检测到碰撞”的异常显示，并且不清楚已经错误地检测到碰撞的情况。 在用于显示机器人的异常的方法中，当检测到机器人的碰撞并且显示碰撞检测时，从与碰撞检测不同的多个异常检测项目中选择至少一个异常显示。 这可以提供有用的用户了解错误碰撞检测发生时的情况的信息。
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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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Patent Agency Ranking
公开(公告)号：US20180207739A1
公开(公告)日：2018-07-26
申请号：US15743433
申请日：2016-08-25
Inventor： ATSUHIRO KAWAMOTO , KAITO MATSUI , MASARU KOWA , TAKAHIRO NOGUCHI , MASASHI FUJIWARA
Abstract: A base material is welded by a first welding method in a case where a welding parameter related to heat input to the base material is less than a first threshold value. The base material is welded by a second welding method in a case where the welding parameter is less than a second threshold value and is more than the first threshold value. The base material is welded by a third welding method in a case where the welding parameter is more than the second threshold value. By adjusting welding conditions regardless of the thickness of the base material, a welding method suitable for the thickness of the base material is determined to provide a welding with little spatter and no meltdown of the base material.
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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：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.
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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.
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