Patent ID: 6606895
Filing Date: 2003-08-19
Classification: B21K,B23P,Y10T

Abstract:
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.