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The formation mechanism and the influence factor of residual stress in machining |
Zhaoxu QI,Bin LI,Liangshan XIONG( ) |
Department of Mechanical Engineering, Huazhong University of Science & Technology, Wuhan 430074, China |
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Abstract Residual stresses generated in cutting process have important influences on workpiece performance. The paper presents a method of theoretical analysis in order to explicate the formation mechanism of residual stresses in cutting. An important conclusion is drawn that the accumulated plastic strain is the main factor which determines the nature and the magnitude of surface residual stresses in the workpiece. On the basis of the analytical model for residual stress, a series of simulations for residual stress prediction during cutting AISI 1045 steel are implemented in order to obtain the influences of cutting speed, depth of cut and tool edge radius on surface residual stress in the workpiece. And these influences are explained from the perspective of formation mechanism of residual stress in cutting. The conclusions have good applicability and can be used to guide the parameters selection in actual production.
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Keywords
residual stress
analytical model
strain
plastic
cutting parameter
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Corresponding Author(s):
Liangshan XIONG
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Online First Date: 27 August 2014
Issue Date: 10 October 2014
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