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The Effects of Ultrasonic Vibration on Surface Finish in Nano-second Laser Machining  

Kang, Bong-Chul (한국과학기술원 기계공학과)
Kim, Gun-Woo (한국과학기술원 기계공학과)
Cho, Sung-Hak (한국기계연구원)
Park, Jong-Kweon (한국기계연구원)
Yang, Min-Yang (한국과학기술원 기계공학과)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.19, no.3, 2010 , pp. 402-406 More about this Journal
Abstract
Conventionally, the machined surface roughness in nano-second(ns) laser machining is damaged and rough due to thermal effects. To obtain the improved surface finish, the ultrasonic vibration is applied to ns-laser machining. The ultrasonic vibration jig is developed to apply the ultrasonic high precision motion to workpieces. And then the ns-laser machining is conducted to compare the effects of the ultrasonic vibration. The results show that the surface roughness with ultrasonic vibration is smoother than that without the vibration. The phenomenon could be explained as enhancement of heat transfer by ultrasonic vibration.
Keywords
Laser machining; Ultrasonic vibration; Surface roughness; High precision; Heat transfer; Nano particle;
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