Patent ID: 6382884
Filing Date: 2002-05-07
Classification: B23C,F01B,F02F,Y10T

Abstract:
A method for machining a valve seat having a desired valve seat profile utilizing a spindle situated on a vertical axis, the valve seat profile comprising a plurality of segments, each segment having a segment length and a segment angle, the method comprising the steps of:rotating the spindle at a rotational speed, the spindle having a single point cutting tool connected to a distal end of the spindle for machining the desired valve seat profile; and for each segment of the plurality of segments, moving the single point cutting tool radially with respect to the vertical axis and vertically feeding the spindle along the vertical axis at a feed rate F determined according to the relationship F=P(cos &thgr;Â·tan &agr;âˆ’sin &thgr;) for a length of vertical displacement d determined according to the relationship d=[AB/cos &thgr;]Â·sin(&agr;âˆ’&thgr;), where &thgr; is the inclination angle of the carriage head, P is the feed per revolution of the carriage head, AB is the segment length and &agr; is the segment angle; wherein the rotation of the cutting tool and the radial movement and vertical feed result in the cutting tool machining the desired valve seat profile.