Rotary tool and its cutting part
AssigneeSanwa Kenma, Ltd.
InventorHirofumi Amamoto
Life of this patent
Estimating the term…
Abstract
A rotary tool (T) has a rotary segment (10) with an opposed surface opposed to a work surface and a plurality of cutting parts (20) arranged on the opposed surface. Some cutting parts (20) include tips (22a) made of a grinding tool segment obtained by binding abrasive grains by a metal binder and the other cutting parts (20) include tips (24a) made of a sintered material harder than the grinding tool segment, and the respective cutting parts (20) are arranged such that the tips (24a) are located at positions more outward than the tips (22a) with respect to radial directions of the rotary segment.
Claims18
A cutting part for use in a rotary tool including a rotary segment having an opposed surface opposed to a work surface, comprising a tip for scratching off a surface portion of the work surface when the rotary segment is pressed against the work surface while being drivingly rotated about an axis extending in a direction normal to the opposed surface, wherein an inner part of the tip with respect to a radial direction is made of a grinding tool segment obtained by binding abrasive grains by a metal binder and an outer part of the tip with respect to the radial direction is made of a sintered material harder than the grinding tool segment.
A rotary tool, comprising:
- a rotary segment having an opposed surface opposed to a work surface;
- and
- a plurality of cutting parts arranged on the opposed surface and each having a tip for scratching off a surface portion of the work surface in a peripheral direction, the rotary tool scratching off the surface portion of the work surface by pressing the respective cutting parts against the work surface while the rotary segment is drivingly rotated about an axis extending in a direction normal to the opposed surface,
- wherein:
- the opposed surface is arranged with a grinding tool segment obtained by binding abrasive grains by a metal binder;
- each of the cutting parts includes a tip made of a sintered material harder than the grinding tool segment;
- and
- the tip made of the sintered material is provided at a position more outward than the grinding tool segment with respect to radial direction of the rotary segment.
A rotary tool, comprising:
- a rotary segment having an opposed surface opposed to a work surface;
- and
- a plurality of cutting parts arranged on the opposed surface and each having a tip for scratching off a surface portion of the work surface in a peripheral direction, the rotary tool scratching off the surface portion of the work surface by pressing the respective cutting parts against the work surface while the rotary segment is drivingly rotated about an axis extending in a direction normal to the opposed surface, the plurality of cutting parts including at least one cutting part having a tip whose inner part with respect to the radial direction is made of a grinding tool segment obtained by binding abrasive grains by a metal binder and whose outer part with respect to the radial direction is made of a sintered material harder than the grinding tool segment.
(canceled)
Dependencies are inferred from the claim text.