摘要:
A welding system and method provide for generating a controlled waveform for welding power output, the waveform comprising a plurality of successive peak phases (84) designed to avoid or reduce micro-arcing when used with metal-cored or flux-cored electrode wires. Ratios of the background current and voltage levels are elevated as compared to conventional techniques, with the levels in most cases exceeding 50% of the peak currents and voltages. Transitions between background and peak levels of current and voltage are also smoothed (88), and the duration of the peak phase as compared to the duration of each pulse cycle is elongated to further reduce micro-arcing.
摘要:
A method and system for controlling arc/short between a wire and a work piece is described. The welding system (100) comprises a power circuit (102), an arc clamp module (112), and a controller (103). The power circuit is connected to provide welding-type power on a first electrode and a second electrode, and the power circuit has at least one control input. The arc clamp module is electrically coupled to the first electrode and the second electrode. The controller has a power circuit control output that is connected to the control input on the power circuit. The method for controlling welding-type power includes providing welding-type power on a first electrode and a second electrode, where there is a working current path between the first electrode and the second electrode and at least one of current through or voltage across the working current path is controlled by providing a bypass current path that is in parallel with the working current path.
摘要:
An apparatus may include an input circuit to receive an AC input voltage having a first magnitude within a range of AC input voltages, and generate a first DC voltage; a boost converter to receive the first DC voltage and output a second DC voltage having a fixed magnitude that is not dependent upon the first magnitude of the AC input voltage; an output circuit to receive the second DC voltage and convert the second DC voltage into welding type power; a control DC-DC converter to receive the first DC voltage and output a control power signal as a third DC voltage; a boost converter control component to receive the control power signal and generate a control signal to control operation of the boost converter; and an auxiliary AC power source to receive the second DC voltage output by the boost converter and to generate an AC auxiliary output voltage.
摘要:
A welding system includes a power source configured to generate power and deliver the power to a welding torch. The power is provided in accordance with an electrode negative pulse welding regime that includes a cyclic peak, followed by a stabilization phase, then a return to a background level. The stabilization phase has a generally parabolic current shape, and is performed in a current-closed loop manner until a transition point. Resulting weld performance is improved, with a globular-like transfer mode, reduced shorts and enhanced arc stability.
摘要:
Bekannte Plasmaschneidmaschinen verfügen über einen mittels einer Bewegungseinheit bewegbaren Plasmabrenner, einem auf niedrigem Spannungsniveau ansteuerbaren Abstandssensor mit einer elektronischen Steuereinheit zur Ermittlung des Abstandes zwischen einem zu bearbeitenden Werkstück und dem Plasmabrenner, einer auf hohem Spannungsniveau ansteuerbaren Zündeinrichtung mittels der ein Zündvorgang auslösbar ist sowie einer mit dem Plasmabrenner bewegten Schutzeinrichtung zum Schutz der elektronischen Steuereinheit gegen aus dem Zündvorgang resultierender Störspannung. Um hiervon ausgehend eine Plasmaschneidmaschine bereit zu stellen, die hohen Anforderungen an die Störfestigkeit und Betriebssicherheit genügt, wird erfindungsgemäß vorgeschlagen, dass die Schutzeinrichtung eine elektronische Schaltung beinhaltet, die die elektronische Steuereinheit für den Abstandssensor, einen mehrere Schutzstufen umfassenden Schutzschalter zum Abbau der Störspannung sowie eine Schnittstelle zu einer Maschinensteuerung aufweist.
摘要:
A welding power supply (10) includes a housing (12) and a one-piece chassis (40). The one-piece chassis (40) is coupled to the housing (12) and configured to be enclosed within the housing (12). Moreover, the one-piece chassis (40) is configured to be selectively removable from the housing (12) and to have multiple components coupled thereto. The components include one or more transformers, a fan blade, one or more rectifiers, one or more inductors, and control circuitry.
摘要:
An electric arc welder (A) including a high speed switching power supply (10) with a controller (60) for creating high frequency current pulses with negative polarity components through the gap (g) between a workpiece (W) and a welding wire (20) advancing toward the workpiece (W). Molten metal droplets (D) are quickly created during negative polarity portions (120) of the weld cycle. Welding controls include integrating a parameter during the negative polarity portions (120) to determine when a desired amount of energy has been generated at the welding wire (W). This energy is associated with a desired droplet (D) size for consistent droplet transfers to the workpiece (W).
摘要:
A method of and a system (100) for steering an arc and/or torch head (120) in a weld joint (145) is provided. The system (100) includes a torch head (120) that creates an arc in a weld groove formed in at least one workpiece (115A, 115B). The system (100) also includes a control unit (190) that includes a feedback system that monitors at least one of a voltage of the arc, a current of the arc, a power output of the torch power supply, and a contact tip to weld distance. The control unit (190) outputs a feedback signal corresponding to the monitoring. The control unit (190) also includes a comparison circuit that compares the feedback signal with at least one predetermined value corresponding to a position of at least one of the arc and the torch head (120) in the weld groove. The control unit (190) further includes an arc steering system (180) that outputs a steering signal based on the comparison.
摘要:
A welding system including a plurality of welding components (20, 21, 33, 43) communicating via a wireless system using low profile and planar antennas (40) is disclosed. The welding system comprises a welding power source (43) and one or more other welding system component(s) (20, 21, 33) communicating via Zigbee or other wireless communication networks. Communications are transmitted between the components (20, 21, 33, 43) of the welding system through antennas (40) mounted externally to the housing of the welding equipment(s) (20, 21, 33, 43). The antennas (40) can be low- profile planar antennas (40), either linearly or circularly polarized, which can be advantageously mounted to a housing while limiting undesirable contact with the environment and therefore to limiting the potential for damage.
摘要:
Metal fabrication systems, such as welding systems and related equipment may be analyzed and performance compared by collecting parameter data from the systems during welding operations via a web based system. The data is stored and analyzed upon request by a user. A user viewable page may be provided that allows for selection of systems and groups of systems of interest. Parameters to be used as the basis for comparison may also be selected. Pages illustrating the comparisons may be generated and transmitted to the user based upon the selections.