Importance

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Abstract

A grinding machine for grinding a ball end mill which has a cutter teeth of a plain or frustconical shape in the circumference thereof and a cutter teeth of spherical shape in the tip end thereof. The grinding machine comprises a turntable for a spindle through an angle .alpha. of turning movement having a reference position in which the spindle extends parallel to an X-axis in a pattern of tan .gamma..multidot.F(.alpha.), a grinding wheel mechanism tiltable laterally about a Y-axis intersecting at right angle with the X-axis and having grinding wheel shafts provided on the grinding wheel mechanism for alternatively supporting face and flank grinding wheels and a device for moving the grinding wheel shafts in order to enable the tip end of a cutter tooth being generated to lie in a prescribed point on the Y-axis at all time, characterized in that a grinding surface of the supporting face is able to contact the curved surface of a spherical cutter tooth in a prescribed point on the Y-axis, and the flank guiding wheel is tiltable dependent on the turning movement of the turntable in a pattern of tan .gamma..multidot.F'.alpha.cos .alpha. so as to be able to contact the curved cutting edge of the spherical cutter tooth in a contact relationship at all times dependent on the shape of the flank.

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First Claim