Results 211 to 220 of about 42,628 (263)
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Modeling of arc force in plasma arc welding
Transactions of Tianjin University, 2008A three-dimensional mathematical model for the transferred-type argon arc was developed to describe arc force on the anode surface. The software ANSYS was employed to solve the model. The model includes a part of torch and tungsten electrode to achieve more reasonable results. The arc temperature and flow fields were derived.
Zhonglin Gao +3 more
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Journal of Nuclear Materials, 1978
Abstract In a plasma an arc discharge may operate sustained by electromotive forces produced by special structures of the system e.g. sheaths and density gradients. The current flow of such an arc discharge may be quite complicated using besides the plasma all kinds of conducting walls with which it is in contact.
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Abstract In a plasma an arc discharge may operate sustained by electromotive forces produced by special structures of the system e.g. sheaths and density gradients. The current flow of such an arc discharge may be quite complicated using besides the plasma all kinds of conducting walls with which it is in contact.
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2013
The development of the plasma transferred arc coating process was directed towards reducing the cost of corrosion and wear resistant parts. Regular steel parts with an appropriate PTA coating can exhibit superior corrosion and wear behavior even compared to specialty alloys. The process is significantly different from the other coating processes as the
Pierre L. Fauchais +2 more
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The development of the plasma transferred arc coating process was directed towards reducing the cost of corrosion and wear resistant parts. Regular steel parts with an appropriate PTA coating can exhibit superior corrosion and wear behavior even compared to specialty alloys. The process is significantly different from the other coating processes as the
Pierre L. Fauchais +2 more
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Floating potential and plasma sheath in vacuum arc plasma
Journal of Applied Physics, 1993Variation of the electric field across the plasma sheath and floating-potential magnitude are calculated at vacuum arc plasma-plane floating surface contact. Due to the nonequilibrium conditions in the cathode-governed vacuum arc plasma, the floating-potential magnitude is smaller and the effective plasma sheath thickness is larger, compared to the ...
Radić, Nikola +2 more
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1993
Abstract Plasma arc welding (PAW) can be defined as a gas-shielded arc welding process where the coalescence of metals is achieved via the heat transferred by an arc that is created between a tungsten electrode and a workpiece. This article discusses the melt-in mode and the keyhole mode of the PAW process, as well as the advantages and ...
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Abstract Plasma arc welding (PAW) can be defined as a gas-shielded arc welding process where the coalescence of metals is achieved via the heat transferred by an arc that is created between a tungsten electrode and a workpiece. This article discusses the melt-in mode and the keyhole mode of the PAW process, as well as the advantages and ...
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FROM TRANSFERRED ARC TO PLASMA TORCHES
High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes), 2005Thermal plasma generated either by transferred arc or by plasma torches are involved in many industrial processes including, for example, cutting, welding, powder synthesis or coating elaboration by plasma spray techniques. The common feature is that electrical energy is converted into thermal energy, which must be transferred differently following the
Coudert, Jean-François +3 more
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Initiation of Arcing at a Plasma-Wall Contact
IEEE Transactions on Plasma Science, 1982Conditions for the initiation of arcing in a plasma-wall contact were studied experimentally. Arcing could only be initiated by applying a bias voltage producing a net ion current to the wall. Results obtained show that crucial parameters for the initiation of arcing are the wall material, surface contaminations, the voltage across the plasma-wall ...
H. Ehrich, J. Karlau, K.G. Müller
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2016
This chapter focuses on the theoretical description of the physical processes in the Arc plasma torches with different technological applications. The features of electric Arcs and their models for the study of Arc plasma torches are presented. The need to determine the two-dimensional electromagnetic field, especially in the case of an open free Arc ...
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This chapter focuses on the theoretical description of the physical processes in the Arc plasma torches with different technological applications. The features of electric Arcs and their models for the study of Arc plasma torches are presented. The need to determine the two-dimensional electromagnetic field, especially in the case of an open free Arc ...
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Robotic ARC Welding and Plasma ARC Cutting
SAE Technical Paper Series, 1987<div class="htmlview paragraph">Robotic arc welding and plasma arc cutting, in general, require precise positioning of the torch relative to the workpiece. To this end, a 1-dimensional non-contact sensor was applied to two assembly plant tasks and found to perform to requirements while maintaining the system's cost effectiveness.</div> < ...
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1993
Abstract Plasma arc cutting (PAC) is an erosion process that utilizes a constricted arc in the form of a high-velocity jet of ionized gas to melt and sever metal in a narrow, localized area. This article discusses the process description, equipment, gases, operating sequence, process considerations, and applications of PAC.
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Abstract Plasma arc cutting (PAC) is an erosion process that utilizes a constricted arc in the form of a high-velocity jet of ionized gas to melt and sever metal in a narrow, localized area. This article discusses the process description, equipment, gases, operating sequence, process considerations, and applications of PAC.
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