Method of manufacturing a crown-shaped component
AssigneesKoyo Seiko Co., Ltd., Daido Tokushuko Kabushiki Kaisha
InventorsTakahiro Sanada, Yoshiro Sakai, Narito Shimizu, Jun Yatazawa, Shigeru Iwasa
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Abstract
Described is a method of manufacturing a crown-shaped component 3 having a plurality of axially extending protrusions 2 which are formed at an end of a cylindrical portion 1. The method comprises the steps of: upsetting the cylindrical portion into a cylindrical blank 10a having protrusions arrayed on and along the inner circumferential surface of a remaining part 12; annealing the cylindrical blank; removing the remaining part by cutting; and subjecting the resultant blank to a shot blasting process, whereby a magnetic characteristic of the resultant crown-shaped component is improved.
Claims9
A method of manufacturing a crown-shaped component having a generally stable magnetic characteristic and being suitable for use as a torque sensor, said manufacturing method comprises the steps of:
- upsetting and deforming a cylindrical-shaped blank into a cylindrical-shaped member that includes a cylindrical portion, a plurality of protrusions formed at the top end of the cylindrical portion, an annular-shaped remaining part connected to the cylindrical portion, said protrusions being arrayed on and along the inner circumferential surface of the remaining part;
- annealing the upset and deformed cylindrical-shaped member;
- cutting and removing the remaining part from the annealed cylindrical-shaped member so as to form a crown-shaped member which is substantially coincided with the crown-shaped component in shape;
- shot-blasting the crown-shaped member.
Dependencies are inferred from the claim text.