Patent ID: 7607374
Filing Date: 2009-10-27
Classification: B23B,Y10T

Abstract:
1. A milling head for a rotary milling tool, comprising: a substantially cylindrical body having an annular recess, said body adapted to be connected to a rotary milling tool, a first milling portion, adapted to remove a portion of an outer diameter of a tube, located substantially at one end of the body and having one or more cutting blades connected a predetermined radial distance from a rotational axis of the body to the body by a securing element, wherein the securing element includes a head which extends out from a face surface of said blade a first distance which is less than or equal to a second distance measured from a lower edge of the securing element head to a lower cutting edge of the blade, each said cutting blade having one or more cutting edges including the lower cutting edge, said one or more cutting edges defining an annular cutting sweep having an inner radius and an outer radius wherein the outer radius is adapted to be greater than an outer diameter of the tube, said cutting sweep adapted to remove from about 2% to about 25% of an outer radial thickness of the tube and any weld overlay and membrane present on the tube within the annular cutting sweep; and a second milling portion spaced from said first milling portion on the body and having at least one bevel cutting blade having an active cutting edge extending into the recess adapted for forming a bevel on the tube.