Patent ID: 6403910
Filing Date: 2002-06-11
Classification: B23H

Abstract:
An electric discharge machining module for forming a hole in a workpiece with an electrode, comprising:a module body defining a throughbore extending along an axis; a spindle assembly at least partially positioned within said throughbore for rotation around said axis, said spindle assembly including a first electrode passageway coaxial with said axis for receiving said electrode therethrough; and, a piston assembly positioned within said throughbore for movement along said axis between a released position and an engaged position, said piston assembly including a second electrode passageway coaxial with said axis for receiving said electrode therethrough, wherein a collet closer of said piston assembly engages a collet of said spindle assembly when said piston assembly is in said engaged position such that said collet grips said electrode for unitary rotational movement of said electrode and said spindle assembly.