HELICAL BLADE CUTTER

摘要

A helical blade cutter including multiple linear blades attached to an outer circumferential surface of a round body having an outer surface formed into a cylindrical circumferential surface. The blades tilt to a given helix angle α from a straight line on the outer circumferential surface parallel to a rotational central axis O. Blade attachment surfaces are formed on the outer circumferential surface of the round body at given intervals in the circumferential direction. The blade attachment surfaces tilt to an angle same as the helix angle α of the blade while tilting to a rake angle β in a direction of an elevation angle from a tangent to the outer circumferential surface. The blades are each attached to a blade attachment part through intervention of a chip holder that allows detachment of the blade.

主权项

1. A helical blade cutter comprising at least one linear blade attached to an outer circumferential surface of a round body having an outer surface formed into a cylindrical circumferential surface and rotated in a circumferential direction, the at least one blade being arranged at a given interval in the circumferential direction of the outer circumferential surface, the at least one blade tilting to a given helix angle α from a straight line on the outer circumferential surface parallel to a rotational central axis, wherein
a blade attachment surface is formed on the outer circumferential surface of the round body, the blade attachment surface tilting to an angle same as the helix angle α of the blade from the straight line on the outer circumferential surface parallel to the rotational central axis while tilting in a direction of an elevation angle from a tangent to the outer circumferential surface, the blade attachment surface being formed through intervention of a step resulting from the tilt in the direction of the elevation angle, and the blade is attached to a blade attachment part through intervention of a chip holder in a manner that allows detachment of the blade, the blade attachment part having an L shape in cross section resulting from being surrounded by the blade attachment surface and the step.