Formed rotary cutting tool
AssigneeOsg Corporation
InventorKiyoshi Tsuduki
Life of this patent
Estimating the term…
Abstract
A formed rotary cutting tool includes a cutting edge defining a cutting edge diameter that is increased and reduced in a direction of an axis of the tool, so as to have at least one neck portion in which the cutting edge diameter is minimized. The cutting tool includes a roughing portion which is provided on a periphery thereof and which is constituted by a succession of protrusions and recesses arranged in the direction of the axis. The roughing portion includes (i) a fine roughing portion that is provided in at least one of the at least one neck portion, and (ii) another portion that is provided in a portion that is other than the at least one of the at least one neck portion. The fine roughing portion of the roughing portion is different in characteristics from the above-described another portion of the roughing portion.
Claims4
A formed rotary cutting tool that is to be moved relative to a workpiece in a direction perpendicular to an axis of the cutting tool while being rotated about the axis, so as to cut a groove having a predetermined shape, in the workpiece, the formed rotary cutting tool comprising:
- a cutting edge defining a cutting edge diameter that increases and decreases in a direction of the axis, so as to have at least one neck portion in which the cutting edge diameter is minimized;
- and
- a roughing portion provided on a periphery of the formed rotary cutting tool, the rough portion being constituted by a succession of protrusions and recesses arranged in the direction of the axis, the roughing portion including:
- (i) a fine roughing portion provided in at least one of the at least one neck portion, and (ii) a second portion that is provided in a portion that is other than the neck portion in which the fine roughing portion is provided, the fine roughing portion of the roughing portion being different in characteristics from the second portion of the roughing portion, such that the fine roughing portion of the roughing portion is smaller than the second portion of the roughing portion by at least one of:
- a pitch of the protrusions and the recesses, a depth of the protrusions and the recesses, and a radius of curvature of the protrusions and the recesses.
Dependencies are inferred from the claim text.