Patent ID: 11925978
Assignee: KABUSHIKI KAISHA F.C.C.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F  C | IPC B  C  F

Claim 0:
1. A method for manufacturing an aluminum component, the method comprising:
forming an aluminum casting with projections that extend in an axial direction and that are continuously arranged in a circumferential direction, wherein each projection has side surfaces formed from a portion of the side surface that is adjacent to a base end and a portion of the side surface that is adjacent to a projecting end and formed such that the side surfaces are inclined to be tapered in a direction from the base end to the projecting end;
cutting projecting end portions of the projections formed in the forming step along a processing line with a predetermined processing diameter, wherein the portion of the side surface that is adjacent to the projecting end is cut in the cutting step;
forming splines of predetermined dimensions;
the portion of each cut side surface that is cut adjacent to the projecting end in the cutting step is either an inclined surface or a rounded portion, the adjacent projecting end surface having an inclination angle less than an inclination angle of the portion of the side surface that is adjacent to the base end; and
each projection is formed such that a projecting end surface is inclined with respect to the axial direction and that the adjacent projecting end surface or the rounded portion has a width in a circumferential direction that is greater in a region where the dimension of the projecting end surface, inclined with respect to the axial direction in the height direction, is large, than in a region where the dimension of the projecting end surface, inclined with respect to the axial direction in the height direction, is small.