Glass manufacturing – Processes – With wearing away of surface material
Patent
1995-06-07
1997-09-09
Czaja, Donald E.
Glass manufacturing
Processes
With wearing away of surface material
65102, 65111, 2191216, C03B 3300, C03B 3200, C03B 3100, C03C 1900
Patent
active
056651341
ABSTRACT:
Rough machining of a glass-ceramic material article such as a radome is accomplished using a high-power Nd:YAG laser. The radome is rotated about its longitudinal axis, and the point of application of the laser beam is translated generally parallel to the longitudinal axis over either the inside or outside surface of the radome. The Nd:YAG laser preferably operates in a pulsed wave mode with a pulse duration of from about 0.3 to about 3 milliseconds, a pulse frequency of from about 50 to about 500 pulses per second, and a pulse intensity of at least about 3.times.10.sup.4 Watts per square centimeter. After laser rough machining, at least about 0.002 inches of material is removed from the rough-machined surface by a finish machining, preferably mechanical grinding.
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patent: 5472828 (1995-12-01), Akins et al.
Material Removal and Precision Machining of Structural Ceramics Using Nd:YAG Lasers by Nikumb, S.K.; Islam, M.U. Proceedings of the Laser Materials Processing Conference, ICALEO 95, 1995, 168-177.
Laser Machining of Silicon Nitride Base Materials by Campbell, G.R., Islam, M.U. Mater. Manuf. Processes 10(3), 509-18. 1995.
Proceedings of the Laser Materials Proceeding Conference 1993 ND:YAG Laser Assisted Turning System for Ductile Machining of Ceramic Matls Bruce Janvrin 77-86.
Barber Joe W.
Engin Doruk
Jankiewicz Tony
Kirby Kevin
Brown Charles D.
Czaja Donald E.
Denson-Low Wanda K.
Hughes Missile Systems Company
Ruller Jacqueline A.
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