GROOVE PROCESSING TOOL AND GROOVE PROCESSING APPARATUS USING THE SAME

摘要

The present invention is to extend a service life of a groove processing tool. The groove processing tool (2) comprises a support portion (21) and a processing unit (22). The support portion (21) is a part supported in a holder (41). The processing unit (22) is formed at the front end of the support portion (21) and has an edge (222) for processing the groove. When the groove processing tool (2) forms the groove, a cross-sectional shape of the edge (222) in the plane parallel to a main surface (W1) is constant along the vertical direction of the main surface (W1).