EFFECTS OF CUTTING PARAMETERS ON CUTTING FORCE AND CHIP SHRINKAGE COEFFICIENTS IN HIGH-SPEED MILLING OF ALUMINUM ALLOY A7075

Pham Thi Hoa; Tran Viet Hoi; Phan Ngoc Tuan; Phan Dang Thuc

Pham Thi Hoa Faculty of Mechanical Engineering, Hung Yen University of Technology and Education
Tran Viet Hoi Hanoi University of Industry
Phan Ngoc Tuan Faculty of Mechanical Engineering, Hung Yen University of Technology and Education
Phan Dang Thuc Hanoi University of Industry

Keywords: J-C model, HSM, cutting force, chip shrinkage coefficient

Abstract

This paper uses John-Cook material model to simulate by finite element method the high-speed milling of aluminum alloy A7075. Then the effects of cutting parameters, including cutting speed, depth of cut, and tool’s clearance angle on the cutting force and chip shrinkage coefficient, are analyzed. Applying Taguchi and ANOVA methods, the study also found the optimal cutting parameters for F and K of high-speed milling corresponding: V = 1,695 (m/min), t = 1.0 (mm), α = 15º and V = 1,695 (m/min), t = 1.5 (mm), α = 15º. The result of K and F after simulation with obtained parameter set is 1.43 and 51.63 (N), when using Taguchi Gray method to minimize F and K and the common set of parameters are V = 1,695 m/min, t = 1 mm, α = 15º.

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