Cylindrical bore coating procedure uses two-wire thermal torch to project atomised metal onto bore surface after lightly threading it

摘要

The procedure consists of lightly threading the inner surface of the cylindrical bore (4) and then raising the block with the bore on a support (3) so that it is aligned with a two-wire arc torch (7). The block is then moved towards the torch so that their axes of symmetry are in line, and the bore is coated with metal atomised by a gas as an electric arc passes between the two wires and projected onto the bore surface by a second gas passing through a 90-degree nozzle and diffusion cone. An independent claim is given for a device used to implement the outlined procedure.