Process of deburring a mechanical piece

Details Process of deburring a mechanical piece Process of deburring a mechanical piece

1980-04-16

1984-09-25

Rubinson, G. Z.

Electric heating

Metal heating

By arc

219121LJ, 51285, 51323, B23K 2600

Patent

active

044737351

ABSTRACT:
The invention relates to a process and device for deburring mechanical pieces by laser radiation. The device makes it possible to generate a laser beam of determined power Pa. The laser beam is focused in a focusing spot of a diameter 2.omega.o on the edges of the mechanical piece to be deburred. The focused laser beam causes a volatilization of the burrs of the edge considered: axis ZZ' of the laser beam is approximately concurrent with the edge to be treated and the material is vitrified over a width .omega.o. To obtain, on the edge, a given angle of sharpening .alpha. of a skew surface constituting the edge of a given radius of curvature R, the emission power ##EQU1## where K represents the heat conductivity coefficient of the material of the pieces and Tv and Ts its vaporization and fusion temperatures respectively. A relative movement of the focusing spot of the laser beam in relation to the edge to be treated is performed at a linear speed ##EQU2## where H represents the thermal diffusivity coefficient of the material. The invention finds application in the removal of the wire edge of sharp instruments.

REFERENCES:
patent: 3448548 (1969-06-01), Watson
patent: 4081655 (1978-03-01), Gale
patent: 4114018 (1978-09-01), Von Allmen et al.
patent: 4159686 (1979-07-01), Heim
patent: 4218494 (1980-08-01), Belmondo et al.
patent: 4250374 (1981-02-01), Tani
Precision Engineering, vol. 1, No. 4, Oct. 1979, pp. 189-198; "Deburring Precision Miniature Parts", by L. K. Gillespie.

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