Abstract:
Verfahren und Vorrichtung zum Fügen eines Verbundblechbauteils mit einem weiteren Bauteil Um ein Verfahren zum Fügen eines mehrschichtigen Bauteils mit einem weiteren Bauteil derart weiter zu verbessern, dass das Fügeverfahren sowie die Vorbereitung der Fügestellen möglichst schnell und kostengünstig mittels eines automatisierten Verfahrens durchgeführt werden kann, wird vorgeschlagen, durch Erwärmen und Ausüben einer Druckkraft (16) eine Zwischenschicht (14) des mehrschichtigen Bauteils im Bereich der Fügestelle (15) zu verdrängen und die beiden äußeren Bauelemente (10, 11) des mehrschichtigen Bauteils durch Anlegen einer elektrischen Spannung (17) aneinander zu heften.
Abstract:
본 발명은 티칭 그룹 필터(Teaching Group Filter)가 트랜스포머 용접 건에 인가되는 전류 또는, 전압을 디지털 신호로 변환하여 나온 파형 데이터를 입력받는 입력단계, 상기 입력받은 파형 데이터와, 파괴 검사를 통해 누적 저장된 전류 또는 전압의 합격 파형 데이터와 비교하는 제1 비교단계, 상기 제1 비교단계의 비교결과, 상기 입력받은 파형 데이터와 해당 합격 파형 데이터가 동일하거나 설정 오차 범위 내에서 유사한 경우 해당 용접물의 품질에 대해 합격 판정하고, 상기 입력받은 파형 데이터와 해당 합격 파형 데이터가 설정 오차 범위를 벗어나 상이한 경우 해당 용접물의 품질에 대해 불합격 판정하는 제1 판정단계 및, 상기 제1 판정단계의 판정 결과에 따라 합격 또는 불합격 메시지를 출력하여 사용자에게 알려주는 메시지출력단계를 포함하여 이루어진 저항 용접 모니터링 장치 및 그 방법과 시스템에 관한 것으로, 측정자의 숙련도에 상관없이 간단한 기존 설비를 이용해 자동으로 정확히 용접불량 여부를 파악할 수 있고, 용접불량 검사시간도 줄일 수 있으며, 더불어 티칭(Teaching) 범위로 신뢰도를 높이고 조절도 가능한 효과가 있다.
Abstract:
The invention concerns a method for data acquisition, in the form of measurements and calculations, of diagnosis and decision assistance for a direct spark butt electric welder and for the resulting weld seams comprising respectively steps which consist in: measuring the instantaneous alternating voltage at the terminals of primary winding (19, 33) and of the secondary winding (16, 35, 36) of the welder transformer, and between the jaws (18, 39) of the welding die; measuring the instantaneous current in the transformer primary winding (24, 34) and secondary winding (17, 37, 38); measuring the instantaneous displacement (41, 42) of the mobile die (4); storing said voltages, said currents and said displacement during the welding process; calculating the power supplied by the secondary winding to the dies and the heat energy dissipated during the electric spark welding, based on the displacement of the mobile die; calculating the power efficiency and based on said measurements and calculations, automatically establishing a real time diagnosis (68, 74, 78, 79, 80) with or without interactive intervention of an operator, concerning the quality of at least one weld seam which has just been produced by the welder.
Abstract:
The invention relates to a welding device for joining at least two objects (9, 10), comprising at least two electrodes (6, 7) for contacting said objects (11, 12), and a transformer (5) for supplying a current to the electrodes (6, 7). The invention is characterized in that it comprises a rectifier (1) which is connected to an inverter (2), which in turn is connected to the transformer (5), and a frequency control device (3) for controlling the frequency of the inverter (2). The invention provides an improved welding device for welding of sheet-like material, particularly roofing panels.
Abstract:
The invention concerns a method for data acquisition, in the form of measurements and calculations, of diagnosis and decision assistance for a direct spark butt electric welder and for the resulting weld seams comprising respectively steps which consist in: measuring the instantaneous alternating voltage at the terminals of primary winding (19, 33) and of the secondary winding (16, 35, 36) of the welder transformer, and between the jaws (18, 39) of the welding die; measuring the instantaneous current in the transformer primary winding (24, 34) and secondary winding (17, 37, 38); measuring the instantaneous displacement (41, 42) of the mobile die (4); storing said voltages, said currents and said displacement during the welding process; calculating the power supplied by the secondary winding to the dies and the heat energy dissipated during the electric spark welding, based on the displacement of the mobile die; calculating the power efficiency and based on said measurements and calculations, automatically establishing a real time diagnosis (68, 74, 78, 79, 80) with or without interactive intervention of an operator, concerning the quality of at least one weld seam which has just been produced by the welder.
Abstract:
The invention concerns a method of determining an evaluation time interval (10) for assessing the quality of a spot weld based on the variation in temperature at the weld, the method calling for the variation in a quantity which is closely dependent on the temperature to be determined for a multiplicity of reference spot welds of differing quality, and for the variations in this parameter to be compared with each other. From the comparison of these variations, a time interval is determined, for use as the evaluation time interval (10), in which the variations are significantly different from each other and have a sequence which corresponds to a sequence of the qualities of the associated reference spot welds. Assignment of the quality of any spot weld can be carried out simply and precisely using values of the temperature-dependent quantity within the evaluation time interval (10).
Abstract:
In a resistance welding method, by controlling the power amount from a melting start time onward, the weld quality may be stabilized efficiently, even when a disturbance is present, because of the correlation between the amount of power input from the melting atart time and a resulting nugget. The resistance welding method includes: pressing an electrode (11a, 11b) against a workpiece (Wa, Wb); inputting power to the workpiece (Wa, Wb) through the electrode (11a, 11b) to subject the workpiece (Wa, Wb) to Joule heating; detecting the melting start time, which is the time at which at least a portion of the faying portion of a workpiece (Wa, Wb) starts to melt when subjected to Joule heating; calculating a first power amount input into the workpiece (Wa, Wb) from the melting start time; and determining whether the first power amount has reached a first set value; and continuing the Joule heating until the first power amount reaches the first set value.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Ermitteln des zeitlichen Verlaufs der Spannung (u e (t)) an den Elektroden (3) einer Punktschweißzange (1) während eines Punktschweißvorgangs als Indikator für die Schweißqualität, wobei die Elektroden (3) an zueinander bewegbaren Zangenarmen (2) befestigt sind, mit einer Einrichtung (9) zur Messung einer Messspannung (u m (t)) zwischen den Elektroden (3), welche Messeinrichtung (9) mit entlang der Zangenarme (2) verlaufenden Messleitungen (6) verbunden ist, und mit einer Kompensationsspule (7) zur Messung einer Kompensationsspannung (u k (t)) zum Kompensieren von Messfehlern in den Messleitungen. Zur möglichst genauen Ermittlung des zeitlichen Verlaufs der Spannung (u e (t)) an den Elektroden (3) der Punktschweißzange (1) während eines Punktschweißvorgangs sind die Einrichtung (9) zur Messung der Messspannung (u m (t)) und die Einrichtung (10) zur Messung der Kompensationsspannung (u k (t)) als separate Einheiten zur getrennten Erfassung ausgebildet und mit einer Einrichtung (11) zur Verarbeitung dem erfassten Messwerk verbunden.