Formed rotary cutting tool having varying diameter and constant clearance angle, and method of forming groove by using the same

A formed rotary cutting tool including; a generally cylindrical body portion having (a) a plurality of flutes which are formed in the body portion to generally axially extend and which are located around the axis so as to be angularly spaced apart from each other, and (b) cutting edges which coopera...

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Bibliographische Detailangaben
Hauptverfasser:	TATEBE, NAOMI, KAMATA, SATORU
Format:	Patent
Sprache:	eng
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR MILLING PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING
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Beschreibung
Zusammenfassung:	A formed rotary cutting tool including; a generally cylindrical body portion having (a) a plurality of flutes which are formed in the body portion to generally axially extend and which are located around the axis so as to be angularly spaced apart from each other, and (b) cutting edges which cooperate with each other to have a diameter that changes in the axial direction, so that the body portion has a desired configuration. The tool is rotated about the axis to form a groove whose configuration corresponds to the desired configuration, in a solid workpiece. Each of the cutting edges is defined by an intersection of a rake face and a flank face which has a predetermined clearance angle that is constant in the axial direction, irrespective of the change of the diameter.