A study on determining the exponents for a constitutive equation in laser assisted machining

LAM (Laser-assisted machining) was proposed to increase machinability by using laser preheating. Before machining, the workpiece is preheated by laser to decrease strength of material. In this reason, cutting force and tool wear is decreased when machining by LAM. The purpose of this study is to pro...

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Bibliographic Details
Published inInternational journal of precision engineering and manufacturing Vol. 14; no. 11; pp. 2051 - 2054
Main Authors Kang, Dong-Wi, Lee, Choon-Man
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2013
Subjects
Engineering
Industrial and Production Engineering
Materials Science
Short Communication
Constitutive equation
Finite element method
Laser-assisted machining
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ISSN2234-7593
2005-4602
DOI10.1007/s12541-013-0266-9

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Summary:LAM (Laser-assisted machining) was proposed to increase machinability by using laser preheating. Before machining, the workpiece is preheated by laser to decrease strength of material. In this reason, cutting force and tool wear is decreased when machining by LAM. The purpose of this study is to propose a constitutive equation for LAM. The constitutive equation is a relation between physical quantities such as shear stress and strain. These quantities can be predicted by using the constitutive equation in any conditions. Before conducting experiment, FEA (Finite element analysis) is carried out to obtain the laser power to sustain a certain preheating temperature. The experiments are conducted by varying the laser power, feed rate and spindle speed. And a constitutive equation for LAM is proposed using Merchant’s cutting theory and cutting force measured by a dynamometer in the experiments.
ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-013-0266-9