Method for producing a spark wheel

Details Method for producing a spark wheel Method for producing a spark wheel

F - Mech Eng,Light,Heat,Weapons

23

Q

76/24

F23Q 2/46 (2006.01) B23D 73/08 (2006.01) B23P 17/00 (2006.01)

Patent

CA 1097951

ABSTRACT OF THE DISCLOSURE A spark wheel blank is provided with spaced helical grooves and lands or the like, as in a conventional threading or knurling operation. The blank so prepared is forced coaxially through the bore of a broaching die having a plurality of circumferentially spaced cutting surfaces which cut spaced notches across the lands to form a plurality of axially and circumferentially spaced teeth on the blank. The spark wheel thus formed is then subjected to an additional broaching step to remove portions of the teeth formed in the first broaching step, providing sharpened teeth for improved sparking performance. -2-

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