Method and tool for cutting inside corner
AssigneeToshiba Kikai Kabushiki Kaisha
InventorsKouichi Katoh, Takamasa Ito, Nobuyuki Endo, Makoto Sagara
Life of this patent
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Abstract
A cutting tool for a machine tool is provided in order to cut an inside corner of a workpiece. The cutting tool has at least one cutting edge formed on its bottom. In operation, the cutting tool is rotated by the machine tool. Further, both cutting tool and workpiece move relatively to each other in accordance with the rotating angle of the cutting tool so that the cutting tool has its outer end describing a moving track in agreement with the contour of an inside corner of the workpiece. The cutting tool further moves along the direction of a rotating axis of the cutting tool in rotation.
Claims15
A method of cutting an inside corner of a workpiece, comprising:
- providing a main spindle having a rotating axis;
- attaching a cutting tool to the main spindle for rotation of the cutting tool about the rotating axis, the cutting tool having a regular polygonal bottom face with respective peaks and sides, at least one of the sides comprising a cutting edge in the rotating direction, the cutting edge extending from a peak;
- rotating the cutting tool about the rotating axis while effecting relative movement between the cutting tool and the workpiece, the relative movement forming a cyclic moving track of the rotating axis of the cutting tool in accordance with the rotating angle of the cutting tool, so that the peak from which the cutting edge extends moves in a path corresponding to a profile of the inside corner of the workpiece;
- and
- displacing the cutting tool axially along the rotating axis of the cutting tool.
A cutting tool for cutting inside corner of a workpiece, comprising:
- a main spindle having a rotating axis;
- a main body detachably coupled to the main spindle so as to rotate about the rotating axis of the main spindle, the main body having a regular polygonal bottom face with at least one cutting edge arranged on a straight line deviated from the rotating axis;
- a table for receiving the workpiece, the main spindle and the table being configured to move both axially and laterally with respect to each other;
- and
- a controller for controlling the rotation of the main spindle and the axial and lateral movement of the table, so that a peak of the polygonal bottom face of the main body moves in a path corresponding to a profile of the inside corner of the workpiece.
Dependencies are inferred from the claim text.