A plasma gas swirl ring for a liquid cooled plasma arc torch is provided. The swirl ring comprises a substantially hollow body having a distal end, a proximal end, an interior region defined by an interior surface, and an exterior surface. The interior region of the body is configured to receive an electrode of the plasma arc torch. The swirl ring comprises a first opening disposed within a portion of the proximal end of the body, a second opening disposed about a central portion of the body, and a third opening comprising at least one swirling port disposed within a portion of the distal end of the body. The third opening is configured to provide a swirling flow of the plasma gas about the electrode at the distal end of the body.

A resin insulation guide is used in a plasma torch including an electrode and a nozzle into which the electrode is inserted. The insulation guide is used to couple the electrode and the nozzle, and includes a first internal circumferential surface formed on an inside of the insulation guide, a second internal circumferential surface formed on the inside of the insulation guide, a communication channel, and a heat resistant coating formed on the first internal circumferential surface. The second internal circumferential surface has an inner diameter smaller than an inner diameter of the first internal circumferential surface. The communication channel communicates a space inside the first internal circumferential surface to an outside of the insulation guide, and extends in a direction inclined with respect to an axial direction of the insulation guide.

The plasma torch has a nozzle and body. The nozzle has an inner nozzle and inner cap fastened to the body with the inner nozzle. Annular water passage and a plurality of independent water passages are formed between the inner nozzle and inner cap. Force applied when the inner cap is fastened to the nozzle base is transmitted via partitions. The torch body has a water supply port and drain port. At least one of the water supply port and drain port is configured as a groove extending on a plane crossing the axis and is connected to the water passage. When the nozzle is fastened to the torch body, one of the independent water passages communicates with the water supply port and another communicates with the water drain port. Rear end surface of inner nozzle is in contact with end surface of the nozzle base thereby obtaining electrical conductivity.

Embodiments of the present invention are directed to an air cooled cutting torch having improved performance. The torch comprises an improved electrode, where the electrode has at least one gas flow port to allow air flow to pass through the electrode to improve cooling and performance.

The invention relates to a single or multipart insulating component for a plasma torch, particularly a plasma cutting torch, for electrical insulation between at least two electrically conductive components of the plasma torch, characterized in that the insulating component consists of an electrically non-conductive and easily thermally conductive material, or at least one part thereof consists of an electrically non-conductive and easily thermally conductive material. The invention further relates to assemblies and plasma torches having the same and to a method for processing, plasma cutting and plasma welding.

The invention features an inner cap for a liquid-cooled plasma arc torch. The inner cap includes a body having a longitudinal axis, a first end, and a second end. The first end includes an annular portion disposed proximate a torch tip. A liquid passage is formed within the body, is shaped to convey a liquid therethrough, and has a first set of ports formed in the annular portion. A gas passage is formed within the body, is shaped to convey a gas therethrough, and includes a second set of ports formed in the annular portion. The annular portion is configured such that subsets of ports in the first set of ports direct the liquid in a radial direction with respect to the longitudinal axis and alternate, in a rotational direction about the longitudinal axis, with subsets of ports in the second set of ports.

The invention relates to a single or multipart insulating component for a plasma torch, particularly a plasma cutting torch, for electrical insulation between at least two electrically conductive components of the plasma torch, characterized in that the insulating component consists of an electrically non-conductive and easily thermally conductive material, or at least one part thereof consists of an electrically non-conductive and easily thermally conductive material. The invention further relates to assemblies and plasma torches having the same and to a method for processing, plasma cutting and plasma welding.

An electrode for a liquid-cooled plasma arc torch is provided that includes a torch body and a cathodic element. The electrode includes an electrode body having a proximal end and a distal end extending along a central longitudinal axis. The electrode also includes a retention region located at the proximal end of the electrode body. The retention region is shaped to engage a first portion of the torch body for retaining the electrode within the torch body. The electrode additionally includes a current interface region located axially proximal to the retention region on the electrode body. The current interface region configured to slidably engage a second portion of the torch body while electrically communicating with the cathodic element of the plasma arc torch. The electrode further includes a sealing member circumferentially disposed about the electrode body. The sealing member is located axially distal to the current interface region and the retention region.

A plasma arc torch includes a cathode extending along an axis of the torch, a pilot arc conductor, and a nozzle body. A first fluid conduit and second fluid conduit extend parallel to the axis of the torch. A first offset fitting includes a first duct coupled to and in fluid communication with the first fluid conduit, and a second duct in fluid communication with the first duct and outwardly radially offset from the first duct and extending away from the first duct in a proximal direction. A second offset fitting includes a third duct coupled to and in fluid communication with the second fluid conduit, and a fourth duct in fluid communication with the third duct and outwardly radially offset from the third duct and extending away from the third duct in the proximal direction. A spring compression plug electrically connects the pilot arc conductor to the nozzle body.

A liquid coolant tube for a plasma arc cutting torch including a hollow elongated inner body shaped to translate within a hollow elongated outer body. The hollow elongated outer body of the liquid coolant tube is shaped to fixedly connect to the plasma arc cutting torch and includes a set of electrode guides. An external surface of the hollow elongated outer body and the set of electrode guides partially define a set of coolant flow channels between the set of electrode guides. The set of electrode guides are shaped to facilitate alignment of an electrode within the plasma arc cutting torch.