Method for producing sparking wheels

Details Method for producing sparking wheels Method for producing sparking wheels

1976-04-08

1977-06-07

DiPalma, Victor A.

Metal working

Method of mechanical manufacture

Obtaining plural product pieces from unitary workpiece

29159R, 29558, 29DIG15, 72 71, 76101A, 431273, B23P 1700

Patent

active

040273768

ABSTRACT:
This method is particularly suited for practice on a multiple spindle screw machine in which each work spindle carries a length of bar stock. The work end of each bar is formed, sized and drilled in a conventional manner to form thereon a wheel shaped workpiece which is then rotated between two thread dies to form diagonal grooves in its periphery. The work is then subjected to two successive broaching operations which cut grooves transversely of the lands formed by the threading dies. When the work has entered the bore of the second broaching tool, the tool is rotated slightly relative to the work to upset the teeth so that their sharp cutting edges are caused to face outwardly.

REFERENCES:
patent: 2297983 (1942-10-01), Rea
patent: 2455348 (1948-12-01), Barstow
patent: 2543235 (1951-02-01), Dreyer et al.
patent: 2852962 (1958-09-01), Fabish
patent: 3466909 (1969-09-01), Weber
patent: 3742753 (1973-07-01), Biesenbach
patent: 3910751 (1975-10-01), Chernock

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