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http://dx.doi.org/10.5302/J.ICROS.2003.9.12.1048

Estimation of Hardened Layer Dimensions Using Multi-Point Temperature Monitoring in Laser Surface Hardening Processes  

우현구 (경일대학교 기계공학부)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.9, no.12, 2003 , pp. 1048-1054 More about this Journal
Abstract
In laser surface hardening processes, the geometrical parameters such as the depth and the width of a hardened layer can be utilized to assess the hardened layer quality. However, accurate monitoring of the geometrical parameters for on-line process control as well as for on-line quality evaluation is very difficult because the hardened layer is formed beneath a material surface and is not visible. Therefore, temperature monitoring of a point of specimen surface has most frequently been used as a process monitoring method. But, a hardened layer depends on the temperature distribution and the thermal history of a specimen during laser surface hardening processing. So, this paper describes the estimation results of the geometric parameters using multi-point surface temperature monitoring. A series of hardening experiments were performed to find the relationships between the geometric parameters and the measured temperature. Estimation results using a neural network show the enhanced effectiveness of multi-point surface temperature monitoring compared to one-point monitoring.
Keywords
laser surface hardening process; depth; width; coating; neural network; multi-point temperature monitoring;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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