Non-rotary cutting tool and process of machining scroll member by using the same
AssigneesMatsushita Electric Industrial Co., Ltd., Osg Corporation
InventorsHideaki Matsuhashi, Tamotsu Nagai
Life of this patent
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Abstract
A non-rotary cutting tool which is to be moved relative to a workpiece in a predetermined direction for cutting the workpiece, with its rake face being held substantially perpendicular to the predetermined direction. The cutting tool includes (a) a generally cylindrical shank portion, and (b) a generally semi-cylindrical body portion which has an outer circumferential surface constituted by the rake face and a semi-cylindrical surface. The semi-cylindrical body portion has a cutting edge which is defined by an edge of the rake face and which is covered with a diamond coating. Also disclosed is a process of machining a scroll member of a scroll compressor by using this non-rotary cutting tool.
Claims8
A non-rotary cutting tool which is to be moved relative to a workpiece in a predetermined direction for cutting the workpiece, comprising:
- a generally cylindrical shank portion;
- and
- a generally semi-cylindrical body portion which is coaxial with said cylindrical shank portion and which is constituted by a rake face and an outer circumferential surface, said rake face having a width smaller than a diameter of said cylindrical shank portion;
- wherein said semi-cylindrical body portion has a cutting edge which is configured by a side cutting edge portion and an end cutting edge portion which are provided by an edge of said rake face and are covered with a diamond coating;
- and
- wherein said semi-cylindrical body portion has a half-moon shape in cross section where a curved line portion of said half-moon shape is configured by the outer circumferential surface and a single straight line portion of said half-moon shape is configured by the rake face, and a rake angle of said side cutting edge portion and a rake angle of said end cutting edge portion are respectively 0° when cutting the workpiece where the rake angle is an angle between the rake face and a tool reference plane where the tool reference plane is a plane perpendicular to said predetermined relative moving direction;
- and
- wherein said side cutting edge portion and said end cutting edge portion intersect perpendicularly with each other, and wherein said cutting tool cuts the workpiece while being kept unrotated.
Dependencies are inferred from the claim text.