Grinding machine for copy-grinding the cutting edge of an end mill and a model for use with the machine

摘要

An apparatus for polishing the relief surface of a specially shaped cutting edge employed in an end mill, the apparatus including a polishing unit (30) having a rotary grinding wheel (31 a model guide (61) disposed at the lower portion thereof with the same guide surface (61 a) as the polishing surface of the grinding wheel (31), a cuttersupport (40), a model support (50) for supporting a model (B1) in parallel with the axis of a cutter (A), and a drive unit (70) for moving both the supports (40),(50) in unison toward the grinding wheel (31) and the model guide (61). The model (B1) has the same outer peripheral surface asthe rotary profile of the cutter, whereby a groove (C) is cut so as to form a model line (C1) corresponding to the cutting edge as predetermined. The relief surfaces (24),(25) are accurately and easily polished by copying the model (B1) while making the model (B1) contact the guide surface (61 a) along the model line (C1) and by turning both in unison while making the cutter (A) contact a polishing surface (31 a).