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公开(公告)号：EP4282571A1
公开(公告)日：2023-11-29
申请号：EP22763045.6
申请日：2022-02-22
发明人： TANIGUCHI, Koichi , OKITA, Yasuaki , SAWANISHI, Chikaumi , MATSUDA, Hiroshi , YAMAMOTO, Motomichi
摘要： Provided is a method for producing a flared joint or a lap joint including a steel sheet and an aluminum-based sheet material through brazing, in which a preceding laser beam is irradiated ahead of a joining position (a joining point) of the steel sheet and the aluminum-based sheet material in the joining direction to preheat a position to be joined, an electrically-heated aluminum-based filler wire is fed to the joining position (the joining point), a following laser beam is irradiated behind the filler wire so that the filler wire is melted to perform brazing, and the filler wire is fed with a tilt in a range of 0° ≤ D ≤ 19° to a front side or a rear side in the joining direction with respect to a line that is a center line passing through a groove center of the flared joint and that is perpendicular to the joining direction, so that a flared joint or a lap joint including a steel sheet and an aluminum-based sheet material is produced without appearance defects of a bead and with a sufficient joint strength.
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公开(公告)号：EP4043141A1
公开(公告)日：2022-08-17
申请号：EP20875531.4
申请日：2020-10-06
摘要： Provided is a resistance spot welding method wherein main current passage includes two or more electrode force application steps including a first electrode force application step and a second electrode force application step following the first electrode force application step, an electrode force F 1 in the first electrode force application step and an electrode force F 2 in the second electrode force application step in the main current passage satisfy a relationship F 1 > F 2 , and an electrode force switching point Tf from the first electrode force application step to the second electrode force application step in the main current passage is set to satisfy predetermined relational formulas.
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公开(公告)号：EP3272451B1
公开(公告)日：2019-08-28
申请号：EP16764385.7
申请日：2016-02-16
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公开(公告)号：EP3130424B1
公开(公告)日：2018-11-21
申请号：EP15806604.3
申请日：2015-06-05
IPC分类号： B23K11/24 , B23K11/11 , B23K11/25 , B23K103/04 , B23K101/18 , B23K101/00
CPC分类号： B23K11/252 , B23K11/115 , B23K11/257 , B23K11/258 , B23K2101/006 , B23K2101/18 , B23K2103/04
摘要： A nugget of an appropriate diameter is obtained without splashing. A resistance spot welding device that joins predetermined parts to be welded includes: a storage configured to store a time variation of an instantaneous amount of heat generated per unit volume and a cumulative amount of heat generated per unit volume in test welding that precedes actual welding; and an adaptive controller and an electrode force controller configured to, in the case where the time variation of the instantaneous amount of heat generated per unit volume in the actual welding differs from a time variation curve stored as the target value, respectively control the current or a voltage during current passage and the electrode force to the parts to be welded to compensate for the difference within a remaining welding time so that the cumulative amount of heat generated per unit volume in the actual welding matches the cumulative amount of heat generated per unit volume stored in the storage.
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公开(公告)号：EP3290146A1
公开(公告)日：2018-03-07
申请号：EP16786122.8
申请日：2016-04-15
CPC分类号： B23K11/115 , B23K11/11 , B23K11/25 , B23K11/255 , B23K11/256 , B23K11/257 , B23K11/258 , B23K2101/18 , B23K2103/04
摘要： A stored time variation curve and cumulative amount of heat generated of each step are each used as a target. In the case where a time variation of an instantaneous amount of heat generated per unit volume differs from the time variation curve in any of the steps, a current passage amount is controlled in order to compensate for the difference within a remaining welding time in the step so that a cumulative amount of heat generated per unit volume in actual welding matches the stored cumulative amount of heat generated in the test welding. Further, in the case where expulsion is detected in any of the steps, then in subsequent welding, the cumulative amount of heat generated per unit volume used as the target is reduced, and the current passage amount is adjusted in accordance with the reduced cumulative amount of heat generated per unit volume.
摘要翻译： 存储的每个步骤的时间变化曲线和累积热量被用作目标。 在任何步骤中每单位体积的瞬时发热量的时间变化与时间变化曲线不同的情况下，控制电流通过量以补偿步骤中剩余焊接时间内的差异 使得实际焊接时每单位体积产生的累积热量与测试焊接中产生的累计热量相匹配。 此外，在任何步骤中检测到排出的情况下，则在随后的焊接中，作为目标的每单位体积的累计发热量被减少，并且当前通过量根据减少的累积量 单位体积产生的热量。
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公开(公告)号：EP3815832A1
公开(公告)日：2021-05-05
申请号：EP19824513.6
申请日：2019-06-17
摘要： A resistance spot welding method comprises: performing test welding; and performing actual welding after the test welding, wherein in subsequent current passage in the test welding, current passage is performed by constant current control under a condition: 0.5 ≤ Vtp/Vtm ≤ 2.0 when tc
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公开(公告)号：EP2965848B1
公开(公告)日：2019-08-14
申请号：EP14759633.2
申请日：2014-01-24
发明人： OKITA, Yasuaki , SAWANISHI, Chikaumi , IKEDA, Rinsei , OI, Kenji
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公开(公告)号：EP3228414A1
公开(公告)日：2017-10-11
申请号：EP15865842.7
申请日：2015-11-18
摘要： A resistance spot welding method with which a nugget of an appropriate diameter can be obtained without splashing regardless of disturbances such as a sheet gap or current shunting in a sheet combination with a high sheet thickness ratio in which a thin sheet is overlapped on one face of two or more overlapping thick sheets is provided. The resistance spot welding method includes performing actual welding to squeeze, by a pair of electrodes (14), a sheet combination with a sheet thickness ratio of more than 3 in which a thin sheet (11) is overlapped on at least one face of two or more overlapping thick sheets (12, 13), and passing a current while applying an electrode force to join the sheet combination, wherein in the actual welding, a pattern of the current and the electrode force is divided into two or more steps including a first step and a second step to perform welding, and an electrode force F1 in the first step and an electrode force F2 in the second step satisfy a relationship F 1 > F 2.
摘要翻译： 本发明提供一种电阻点焊方法，该电阻点焊方法能够获得适当直径的熔核而不会受到飞溅，而不管诸如片材组合中的片材间隙或电流分流之类的干扰，其中薄片材重叠在片材的一个面上 提供两个或更多个重叠的厚片。 该电阻点焊方法包括：执行实际焊接以通过一对电极（14）挤压薄片厚度比大于3的薄片组合，其中薄片（11）在两个薄片（11）的至少一个面上重叠 或更多个重叠的厚片（12,13），并且在施加电极力的同时通过电流以接合片组合，其中在实际焊接中，电流和电极力的图案被分成两个或更多个步骤，包括 第一步骤和第二步骤以执行焊接，并且第一步骤中的电极力F1和第二步骤中的电极力F2满足关系F1> F2。
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公开(公告)号：EP3088119A1
公开(公告)日：2016-11-02
申请号：EP14874195.2
申请日：2014-12-22
IPC分类号： B23K11/24 , B23K11/11 , B23K103/04
CPC分类号： B23K11/24 , B23K11/115 , B23K11/241 , B23K35/02 , B23K35/0205 , B23K2203/04
摘要： In a resistance spot welding method, test welding and actual welding in which a current pattern is divided into two or more steps are performed. In the test welding, a constant current of a different value is passed in each step, and a time variation of an instantaneous amount of heat generated per unit volume and a cumulative amount of heat generated per unit volume are stored as a target value. In the subsequent actual welding, when a time variation amount of an instantaneous amount of heat generated per unit volume deviates during any step from the results of the test welding, a current passage amount is controlled to compensate for the difference during a remaining welding time in the step. In the test welding, 0.3 x I x ≤ I a x , where I a is the current in the first step, and I x is the current in second and subsequent steps.
摘要翻译： 在电阻点焊方法中，执行将电流图案分成两个或更多个步骤的测试焊接和实际焊接。 在试验焊接中，在各步骤中通过不同值的恒定电流，并且将每单位体积的瞬时发热量和每单位体积的累积发热量的时间变化作为目标值进行存储。 在随后的实际焊接中，当从测试焊接结果的任何步骤期间每单位体积产生的瞬时热量的时间变化量偏离时，控制电流通过量以补偿剩余焊接时间 该步骤。 在测试焊接中，0.3 x Ix≤Ia
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公开(公告)号：EP4137260A1
公开(公告)日：2023-02-22
申请号：EP21788603.5
申请日：2021-03-18
摘要： Provided are an arc welded joint and an arc welding method. An arc welded joint according to the present invention is an arc welded joint, having a slag-coverage area ratio S RATIO (%) of 15% or less, wherein S RATIO is calculated by using an equation S RATIO = 100 × S SLAG /S BEAD , where an area of a surface of a weld bead formed by performing arc welding on a steel sheet is defined as a weld bead surface area S BEAD (mm 2 ) and, of the weld bead surface area S BEAD , an area of a region covered with slag is defined as a slag surface area S SLAG (mm 2 ), and having a weld bead width ratio W RATIO (%) of 60% or more, wherein W RATIO is calculated by using an equation W RATIO = 100 × W MIN /W MAX from a maximum value W MAX (mm) and a minimum value W MIN (mm) of a weld bead width in a direction perpendicular to a welding line of the weld bead.
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