Device for the remelt hardening of hollow-cylindrical surfaces

摘要

The invention relates to a device for the remelt hardening of hollow-cylindrical surfaces, in particular the cylinder bearing surfaces of reciprocating-piston machines, according to the plasma-arc remelting process, with a tool head which accommodates an electrode and a gas-discharge nozzle and is provided with current and gas feeds and if need be with coolant feeds, several electrodes and gas-discharge nozzles being distributed over the outer periphery of the tool head to a achieve a more efficient production and long tool life.