A torch head for a liquid-cooled plasma arc torch is provided. The torch head includes a torch body and a torch insulator, coupled to the torch body, having a substantially non-conductive insulator body. The torch insulator includes (i) a first liquid coolant channel, disposed within the insulator body, configured to conduct a fluid flow from the torch head into a consumable cartridge along a first preexisting flow path, (ii) a first liquid return channel, disposed within the insulator body, configured to return at least a portion of the fluid flow from the cartridge to the torch head along the first preexisting flow path, and (iii) a gas channel, disposed within the insulator body, configured to conduct a first gas flow from the torch head to the cartridge along a second preexisting flow path. The first and second preexisting flow paths are fluidly isolated from each other.

A consumable cartridge for a liquid-cooled plasma arc torch is provided. The consumable cartridge comprises a cartridge frame including a proximal end having an end surface, a distal end and a body having a central longitudinal axis extending therethrough. The cartridge configured to form a radio-frequency identification (RFID) interface with a torch head. The consumable cartridge also comprises an arc emitter and an arc constrictor affixed to the cartridge frame at the distal end and an RFID mounting feature formed on or in the cartridge frame adjacent to the end face. The RFID mounting feature is non-concentric with the central longitudinal axis of the body. The consumable cartridge further comprises an RFID tag disposed in or on the RFID mounting feature for transmitting information about the cartridge to a reader device in the torch head when the cartridge is connected to the torch head.

A consumable cartridge frame for a liquid-cooled plasma arc torch is provided. The consumable cartridge frame includes an insulator body configured to be disposed between a torch head and a cartridge tip. The consumable cartridge also includes a first cooling channel, disposed in the body, configured to conduct a first fluid flow received from the torch head to contact a component of the cartridge tip connected to the cartridge frame. The consumable cartridge further includes a first return channel, disposed in the body, configured to conduct at least a portion of the first fluid flow from the component to the torch head. The first cooling channel and the first return channel are non-concentric in relation to a central longitudinal axis of the body.

A liquid-cooled consumable cartridge for a plasma arc torch is provided. The cartridge includes (i) an electrode, (ii) a swirl ring with a first outer retaining feature and a second outer retaining feature on an exterior surface, where the electrode is secured to the swirl ring, and (iii) a nozzle with an inner retaining feature on an interior surface, where the inner retaining feature of the nozzle is mated with the first outer retaining feature of the swirl ring. The cartridge also includes a cartridge frame with an inner retaining feature on an interior surface and an outer retaining feature on an exterior surface. The inner retaining feature of the cartridge frame is mated with the second outer retaining feature of the swirl ring. The cartridge further includes a shield with an inner retaining feature on an interior surface mated with the outer retaining feature of the cartridge frame.

A consumable cartridge for a plasma arc torch includes a cartridge frame having a first end and a second end opposite the first end, the first and second ends defining a longitudinal axis, the second end including a plurality of discrete retaining features. The consumable cartridge includes an electrically conductive contact element secured to the cartridge frame by the plurality of discrete retaining features and translatable up to a predetermined distance within the cartridge frame along the longitudinal axis at the second end, the contact element having a core, a proximal surface, and a distal surface. The proximal surface is shaped to contact a torch plunger of the plasma arc torch upon installation into the plasma arc torch and the distal surface is shaped to contact an electrode of the plasma arc torch during an operation of the plasma arc torch.

In some aspects, torch receptacles for coupling a plasma arc torch to a torch lead can include: a body having a first end to connect to the torch lead and a second end to connect to a torch body; a set of ports within the first end to fluidly connect to a set of fluid conduits within the torch lead; and a multiway valve within the body and fluidly connected to the set of ports and to a torch gas conduit formed in the second end, the multiway valve being configured to: i) manipulate a flow of fluids between the first end and the second end to select from primary gases entering the set of ports, ii) deliver a selected primary gas to the torch body through the torch gas conduit, and iii) fluidly connect the torch gas conduit to a gas supply manifold of the plasma cutting system.

The disclosure describes a power system, a method, and an apparatus for arc handling. The power system configured for arc handling may apply power to a plasma load with a power supply, calculate an impedance of a plasma load based, at least in part, on monitoring voltage and current signals at an input of the plasma load, detect an arc in the plasma load based, at least in part, on the calculated impedance, and manage the power applied by the power supply based, at least in part, on the calculated impedance.