Patent ID: 8015708

Claim:
A method of manufacturing a tonewheel for vehicles, comprising: a forming step comprising machining a material into a tonewheel shape; wherein the forming step includes: a shaping step comprising shaping the material through a progressive mold, thereby forming a semi-finished tonewheel shape having a boss, a sensing part, and a coupling part; and a uniformization step comprising machining the semi-finished tonewheel shape through a strike mold, thereby forming the tonewheel shape, wherein the sensing part of the tonewheel shape has a uniform sectional thickness in a vertical direction and an outside surface which is precisely flat; a sensing-hole machining step comprising machining the tonewheel shape to form a plurality of sensing holes at regular intervals in a circumferential direction of the sensing part of the tonewheel shape, thereby forming a semi-finished tonewheel product having the sensing part with the plurality of sensing holes; and a deformation recovery step comprising processing the sensing part of the semi-finished tonewheel product through a restrike mold, thereby removing deformation created during the sensing-hole machining step, thereby forming a finished tonewheel.