|
Abstract: Taking
the giving character of cutting tool and special material (7050-T7451)
as object, using the milling force model which comes from the milling
experiment as the boundary conditions of FEM, the main factors, i.e. the
residual stress, which affects the dimension stability and distortion of
the finished parts are analyzed. Then, the mathematical model contacting
the residual stress with milling parameters is founded. In the course of
analysis, the idea of kill-elements is introduced to simulate the
material removing, and considering the impaction of cutting tool as soon
as it cuts in the parts, the instant mechanics characteristic of the
cutting tool contacting parts is simulated by micro-time steps, so that
ensure the analysis result be more actual.
Key words: Residual
stress Milling force FEM Impaction effect
CLC No: TH162
国家自然科学基金(50175102)和国防型号工程(00-1810-0785)资助项目.
Received 30510, received in revised form 20040128
|