Design and implementation of a system for laser assisted milling of advanced materials

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• 作者：Xuefeng Wu ; Gaocheng Feng ; Xianli Liu
• 关键词：laser assisted milling ; laser assisted milling device ; silicon nitride ceramic ; finite element analysis ; heat transfer
• 刊名：Chinese Journal of Mechanical Engineering
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：29
• 期：5
• 页码：921-929
• 全文大小：2,515 KB
• 刊物主题：Mechanical Engineering; Theoretical and Applied Mechanics; Manufacturing, Machines, Tools; Engineering Thermodynamics, Heat and Mass Transfer; Power Electronics, Electrical Machines and Networks; Electronics and Microelectronics, Instrumentation;
• 出版者：Springer Berlin Heidelberg
• ISSN：2192-8258
• 卷排序：29

文摘

Laser assisted machining is an effective method to machine advanced materials with the added benefits of longer tool life and increased material removal rates. While extensive studies have investigated the machining properties for laser assisted milling(LAML), few attempts have been made to extend LAML to machining parts with complex geometric features. A methodology for continuous path machining for LAML is developed by integration of a rotary and movable table into an ordinary milling machine with a laser beam system. The machining strategy and processing path are investigated to determine alignment of the machining path with the laser spot. In order to keep the material removal temperatures above the softening temperature of silicon nitride, the transformation is coordinated and the temperature interpolated, establishing a transient thermal model. The temperatures of the laser center and cutting zone are also carefully controlled to achieve optimal machining results and avoid thermal damage. These experiments indicate that the system results in no surface damage as well as good surface roughness, validating the application of this machining strategy and thermal model in the development of a new LAML system for continuous path processing of silicon nitride. The proposed approach can be easily applied in LAML system to achieve continuous processing and improve efficiency in laser assisted machining.