Estimation of deformed laser heat sources and thermal analysis on laser assisted turning of square member |
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Authors: | Jae-hyun Kim Kwang-sun Kim Jun-young Choi and Choon-man Lee |
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Affiliation: | Department of Mechanical Design and Manufacturing Engineering, Changwon National University, Changwon 641-773, Korea |
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Abstract: | Laser assisted machining (LAM) has difficulties in estimating temperature after applying a LAM process due to its very small
heat input area, large energy and movement. In particular, in the case of laser assisted turning (LAT) process, it is more
difficult to estimate the temperature after preheating because it has a shape of ellipse when a laser heat source is rotated.
A prediction method and thermal analysis method for heat source shapes were proposed as a square shaped member was preheated.
The temperature distribution was calculated according to the rotation of the member. Compared with the results of the former
study, the maximum temperature of the calculation results, 1 407.1 °C, is 8.5 °C higher than that of the square member, which
is 1 398.6 °C. In a LAT process for a square member, the maximum temperature is 1 850.8 °C. It is recognized that a laser
power control process is required because square members show a maximum temperature that exceeds a melting temperature at
around a vertex of the member according to the rotation. |
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Keywords: | laser assisted machining laser assisted turning laser preheating laser power control |
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