Apparatus and method for machining cylindrical internal surfaces

Apparatus for machining the interior surface of a cylindrical workpiece comprising:

• a machining head having a longitudinal axis and leading and trailing ends, means for drawing said machining head in one direction longitudinally through a pipe for machining the interior surface thereof and with said leading end facing said one longitudinal direction and with said trailing end facing in an opposite direction, a cutting tool mounted on said head for movement generally radially inwardly and outwardly of said axis, said tool being mounted on said head adjacent said trailing end and spaced from said trailing end toward said leading end, said cutting tool having a cutting edge and a chip deflecting surface inclined relative to said longitudinal axis of said head and extending both circumferentially and longitudinally of said head with said chip deflecting surface facing both in said opposite direction toward said trailing end of said head and in one circumferential direction, and a chip receiving cavity in said head adjacent said chip deflecting surface, whereby when said head is drawn through a pipe during relative rotation therebetween for causing said cutting tool to machine the interior surface of the pipe said chip deflecting surface deflects chips both into said cavity and into the free space in the pipe beyond said trailing end of said head.