arc torch and process

arc torch and process

Electric arc torch: 1956-11-13: 2768279: Electric arc torch apparatus: 1956-10-23: 2686860: Inert gas-shielded arc welding torch: 1954-08-17: 2587331: High-frequency electrical heating method and apparatus: 1952-02-26: 2522482: Electric arc welding: 1950-09-12: 2516016: Arc welding apparatus: 1950-07-18: 2308510: Welding apparatus: 1943-01-19: 2284351: Electric deseaming: 1942-05-26: …

1991-4-12 · A process for controlling wear of an electrode in a plasma arc torch at the termination of a cycle of operation where an arc current and plasma gas flow through the torch are cut off, and where the electrode is mounted within a torch body opposite and in a spaced relationship to a nozzle having an exit orifice for a plasma arc, the electrode ...

2021-7-14 · Arc Cutting Process # 4. Gas Metal Arc (GMA) Cutting: In this process the usual gas metal arc welding equipment is used and the heat for cutting is obtained from the electric arc formed between a continu­ously fed electrode wire and the workpiece, usually with inert gas shielding. Arc is produced between the forward side of the wire and the ...

PTA process is charcterized by an high density plasma arc, obtained by ionization of Argon gas passing trough the electric arc formed between a non-consumable tungsten electrode (-) and the copper plasma nozzle (+) into the welding torch (pilot arc). A second electric arc, called Transferred Arc…

2020-10-13 · Figure 1 demonstrates the principle of the DE-GMAW process and its variants where the main electrode is a consumable wire. The main power supply, main torch/electrode and work-piece form the conventional GMAW process and the main loop. The bypass torch added provides an additional electrode to form an additional arc, i.e., the bypass arc, with

arc melting process is the first choice. O Using plasma arc melting, the metal is melted under inert gas atmosphere (usually Helium or Argon) in a pressure range between 300-1,000 mbar abs. O The plasma arc torch column (partly ionized inert gas) provides the heat source. Under these process conditions, evaporation of alloying elements can be

2021-2-10 · What it means: Plasma Arc Welding. Process: Plasma welding joins workpieces using a high-heat jet of ionized gas that is heated to plasma inside the torch and then forced out through a constricting nozzle. It generates an extremely focused …

In this paper, a three-dimensional (3D) numerical simulation is performed on a stationary arc to study the effect of torch angles in gas tungsten arc welding (GTAW) of SS304 stainless steel. A comparison has been made to investigate 90 and 70° torch angles and analyze the effect on arc and weld pool shape.

Trends in Inverter based technology and software driven process controls have created opportunities for torch manufacturers to digitally interface torches and equipment. Arc Machine Control torches offer advantages of welder convenience and operational savings from real-time display and control of equipment from the gun handle.

Referring now to FIG. 8, an arc torch is shown at T. The torch T is connected on one side to a power supply P. The other side of the power source is connected to the work. The torch, shown diagrammatically, includes a nonconsumable electrode 1. Such electrode may be, for example, a tungsten electrode or a thoriated tungsten electrode.

Machine Control Mig. Trends in Inverter based technology and software driven process controls have created opportunities for torch manufacturers to digitally interface torches and equipment. Arc Machine Control torches offer advantages of welder convenience and operational savings from real-time display and control of equipment from the gun handle.

2016-12-16 · The dynamics of the arc inside the torch can be discerned through two main features: the movement of the arc-anode attachment and the process of formation of a new arc-anode attachment, that what is called the arc reattachment process (Ref 3, 42, 43). The dynamic nature of the arc is evidenced by the temporal variation of the voltage drop ...

Arc welding is a type of welding process using an electric arc to create heat to melt and join metals. A power supply creates an electric arc between a consumable or non-consumable electrode and the base material using either direct (DC) or alternating …

2020-9-9 · Plasma arc welding is an arc welding process using heat produced by a compressed arc between a tungsten non-consumable electrode and another workpiece (transferred arc process) or water-cooled constricting nozzle (non-transferred arc process).. The plasma is a gaseous mixture of positive ions, electrons, and neutral gas molecules. The transferred arc process …

2018-10-15 · Non-transferred arc torches are at the core of diverse industrial applications, particularly plasma spray. The flow in these torches transitions from laminar inside the torch to turbulent in the emerging jet. The interaction of the plasma with the processing gas leads to significant deviations from local thermodynamic equilibrium (LTE) far from the arc core.

Gage, R.M. Arc torch and process—JTST historical patent #31. J Therm Spray Tech 12, 29–33 (2003). https://doi.org/10.1361/105996303770348465. Download citation. Issue Date: March 2003. DOI: https://doi.org/10.1361/105996303770348465

Schematic representation of the flow inside a dc arc plasma torch. and the electromagnetic (or Lorentz) force caused by the local curvature of the arc [1, 2]. Because the length of the arc is linearly dependent on the voltage drop across the torch, the variation of the voltage drop over time gives an indication of the arc dynamics inside the torch.

How Plasma Welding Works: The system requires a power supply and welding torch. In the plasma welding torch a Tungsten electrode is located within a copper nozzle having a small opening at the tip. A pilot arc is initiated between the torch electrode and nozzle tip. This arc …

FIG. 1 illustrates a plasma arc torch 10 that can be utilized to practice the invention. A pilot arc 12 is first established in a plasma chamber 13 between an electrode 14 and a nozzle 16 of a plasma arc torch body 18 by utilizing a starting technique such as high frequency high …

Cascade arc plasma torch and a process for plasma polymerization . United States Patent 4948485 . Abstract: The present invention is directed to an arrangement of cascade arc plasma torches in a process for plasma polymerization. The arrangement is utilized in low temperature plasma polymerization coating and utilizes a plasma reactor with ...

2014-7-16 · Abstract: Torch position, traveling speed, and attitude play an important role in welding quality control for both manual and robotic arc welding process. Besides, their detection may facilitate welding process monitoring, welder training, as well as novel ways …

Another very common thermal cutting technique is plasma arc cutting. This process is based on an electrical arc between an electrode inside a torch and the workpiece. A gas (such as argon, nitrogen, hydrogen or air) is injected into the arc inside the torch, turning it into a plasma with a temperature of more than 10 000 °C.

2019-9-19 · Plasma arc torch having extended nozzle of substantially hourglass: 5017752, Mar 02 1990: ESAB Welding Products, Inc. Plasma arc torch starting process having separated generated flows of non-oxidizing and oxidizing gas: 5023425, Jan 17 1990: ESAB Welding Products, Inc. Electrode for plasma arc torch and method of fabricating same: 5070227, Apr ...

1991-4-12 · A process and apparatus for reducing wear of an electrode in a plasma arc torch involves providing a substantial pressure drop in a flow of plasma gas from the torch to a plasma arc chamber defined by the electrode and a nozzle. The pressure drop is immediately before the plasma arc chamber.

US539794A 1955-10-11 1955-10-11 Arc torch and process Expired - Lifetime US2858411A (en)

2020-1-4 · LASMA ARC SYSTEMS ' ABILITY TO EFFECTIVELY TRANSFORM WASTE INTO INERT END-PRDUCTS. The plasma arc has a wide spectrum of temperatures ranging from 1500°C to over 7000°C, or approximately 1000°C hotter than the surface of the sun. The plasma arc torch uses copper electrodes to create a non-transferred arc. The plasma torch and

2021-2-10 · Arc Welding Equipment and Processes - American Torch Tip Arc Welding Equipment and Processes February 10, 2021 The end goal for all arc welders is the same – an expertly welded, precision product that’s to standard, sturdy, and even beautiful.

2007-4-16 · A high pressure arc process comprising feeding gas trodes being non-consumable and having a passage through a nozzle passage and an electrode having an ori- through which a gas flow is established, the wall of said passage acting to stabilize at least a portion of said arc, fice, establishing an arc between a stick electrode and providing an effluent from said torch in the form of a hot said orifice …

What is claimed is: 1. A method of operating a plasma arc torch for marking a metallic workpiece spaced a distance therefrom, the torch having a body, an electrode and a nozzle mounted in the body so as to define a plasma chamber, a plasma gas flow through the body that forms a pilot arc in the plasma chamber and a transferred arc between the electrode and the workpiece, the nozzle having a ...

Typically, according to the invention, the electrode 10 is of the pencil, rod or stick type provided with an arc-locus tip axially aligned with and adjacent to one end of the nozzle 12. The other primary electrode may, for example, be a metal workpiece (plate) 14.

2009-6-27 · In the plasma cutting process a trans-ferred electric arc constricted by the nozzle is established between the cathode and the workpiece, which serves as an anode. The cutting process is starting from ignition of the low current pilot arc between the cathode and nozzle of the torch. The plasma forming gas blows the pilot arc out the torch.