Rotary milling cutter and milling method using the same technical field
AssigneeShinjo Metal Industries, Ltd.
InventorKeizo Masuyama
Life of this patent
Estimating the term…
Abstract
An end mill 10 is a tool for milling a metal block such as a metal mold and is placed in a machine tool such as a milling machine when in use. The end mill 10 is used to provide a rotary milling cutter and a milling method using the same, in which it is possible to perform orthogonal milling and pocket milling to efficiently form four corners with small radius, without repeatedly milling using a small-diameter end mill. The end mill 10 has two cutting edges 11a and 11b at its distal portion, and an edge angle D1 formed by the two cutting edges 11a and 11b is 70.53 degrees.
Claims11
A rotary milling cutter, comprising:
- a rotation axis;
- a distal portion;
- a proximal portion being arranged opposite the distal portion on the rotation axis;
- and
- a cutting edge disposed on the distal portion of the rotary milling cutter, the cutting edge forming an angle being equal to arctan(1/√2) with respect to the rotation axis and the proximal portion of the rotary milling cutter.
A milling method comprising:
- performing milling on an object with a rotary milling cutter having a cutting edge disposed on a distal portion of the rotary milling cutter until the distal portion of the rotary milling cutter reaches a predetermined point in the object;
- and
- performing milling on the object while pulling the rotary milling cutter up from the predetermined point at a fixed angle of inclination in the direction in which a V-groove is to be formed in the object.
A milling method comprising:
- providing an object having three plane surfaces that mutually intersect perpendicularly;
- providing a rotary milling cutter having
- a rotation axis,
- a distal portion,
- a proximal portion being arranged opposite the distal portion on the rotation axis, and
- a cutting edge disposed on the distal portion thereof, the cutting edge forming an angle being equal to arctan(1/√2) with respect to the rotation axis and proximal portion of the rotary milling cutter;
- setting the rotary milling cutter on a first of the three plane surfaces of the object so as to be perpendicular thereto;
- and
- performing milling while moving the rotary milling cutter at 45 degrees relative to a side of the first plane surface that forms a corner portion thereof.
Dependencies are inferred from the claim text.