Method for manufacturing component, processing apparatus, and component

Patent metadata

Field	Value
Publication number	US-12427589-B2
Application number	US-201917268759-A
Country	US
Kind code	B2
Filing date	Oct 21, 2019
Priority date	Nov 12, 2018
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

The present invention is to eliminate formation of a shape that induces reduction of fatigue strength, without forming a step part, in a shape portion formed by machining. This processing apparatus includes end mills having bottom blades formed in a curved convex shape, and arcuately formed radial blades provided in corner areas; a drive section for driving the end mills; and a control unit for controlling the drive unit. The control unit includes a planar-shape-formation unit that controls the drive unit so as to form, in a workpiece, only a planar-shape portion adjacent to a fillet shape portion in such a manner that a portion of the shape to be processed corresponding to the fillet shape portion is left unprocessed; and a fillet formation unit that controls the drive unit so as to form the fillet shape portion in the workpiece in a single pass using the radial blades.

First claim

The invention claimed is:

1. A method of manufacturing a component using a processing device including a plurality of end mills, each of the end mills including a respective bottom edge formed in a curved convex shape and including a respective end cutting edge provided at a corner of the corresponding one of the end mills, each of the end cutting edges being formed in a shape of an arc, wherein a processing target is formed on the component, the processing target including a fillet-shaped portion of the processing target, the fillet-shaped portion being in a shape of an arc having a predetermined radius, and the processing target also including a planar portion that is adjacent to the fillet-shaped portion of the processing target, the method comprising:
processing a first fillet-shaped portion via one of the plurality of end mills and forming a first planar portion adjacent to the first fillet-shaped portion via the bottom edge of the one of the plurality of end mills so that an unprocessed portion remains on the processing target; and
forming the fillet-shaped portion of the processing target via using the end cutting edge of another one of the plurality of end mills different from the one of the plurality of end mills to remove material from the first fillet-shaped portion in a single pass, such that the component has the processing target formed thereon,
wherein the end mills are corner-radius end mills, and the planar portion of the processing target and the first planar portion are flat surfaces without curvature or are curved surfaces having curvature.

2. The method of manufacturing a component according to claim 1 ,
wherein in the forming of the first planar portion, the first planar portion is formed so that the unprocessed portion remains at a boundary portion between the first fillet-shaped portion and the first planar portion.

3. The method of manufacturing a component according to claim 1 ,
wherein a portion, which is unprocessed in a height direction and remains at a boundary portion between the first fillet-shaped portion and the first planar portion during the forming of the first planar portion, is set to be larger than a portion that is unprocessed in the height direction by the end cutting edge of the another one of the plurality of end mills and that remains at the boundary portion in the forming of the fillet-shaped portion of the processing target in a single pass.

4. The method of manufacturing a component according to claim 1 ,
wherein a second planar portion is formed in the forming of the fillet-shaped portion of the processing target in a single pass, and a ridge portion protruding from the second planar portion in a height direction is formed at a portion where the second planar portion overlaps with the first planar portion formed in the step of forming of the first planar portion.

5. The method of manufacturing a component according to claim 1 , wherein
the component comprises
the planar portion of the processing target, and
the fillet-shaped portion of the processing target,

the fillet-shaped portion of the processing target is adjacent to the planar portion of the processing target and has curvature different from curvature of the planar portion of the processing target,
a convex portion is formed in a height direction so as to be located on a portion of the processing target that is closer to the planar portion of the processing target than to a boundary portion between the fillet-shaped portion of the processing target and the planar portion of the processing target, and
the boundary portion between the planar portion of the processing target and the fillet-shaped portion of the processing target is formed of no stepped portion and is a portion where the curvature of the planar portion of the processing target and the curvature of the fillet-shaped portion of the processing portion are changed.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Eto Jun
• Tanaka Toshiyuki

Classifications

• B23C2270/18

  Milling internal areas of components · CPC title

• B23C2220/00

  Details of milling processes · CPC title

• B23C2215/04

  Aircraft components · CPC title

• Y10T409/308568

  Plural cutters · CPC title

• Y10T409/304424

  Means for internal milling · CPC title