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http://dx.doi.org/10.7736/KSPE.2015.32.12.1023

Analysis of Overlapping Heat Zones in Laser-Assisted Machining  

Baek, Jong-Tae (School of Mechanical Engineering, Changwon National University)
Lee, Choon-Man (School of Mechanical Engineering, Changwon National University)
Publication Information
Journal of the Korean Society for Precision Engineering / v.32, no.12, 2015 , pp. 1023-1029 More about this Journal
Abstract
Laser-assisted machining (LAM) is one of the most effective methods for enhancing the machinability of difficult-to-cut materials, such as titanium alloys and various ceramics, and has been studied by many researchers. LAM is a method that facilitates machining by softening a workpiece using a laser heat source. The advantages of the LAM process are decreases in tool wear, cutting force, and surface roughness. However, when the material is over-heated, melting or burning can occur. This study analyzed the heat source distribution with regard to overlapping of preheating on the laser heating path with an acute angle, a right angle and obtuse angles. Then, a power reduction method was proposed to reduce the melting and burning of the workpiece.
Keywords
Laser-Assisted milling; Laser heat source; Thermal analysis; Overlapping heat zone;
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