INFLUENCE OF MACHINING PARAMETERS ON CHIP SHRINKAGE COEFFICIENT AND MICROHARDNESS OF A7075 ALUMINUM ALLOY DURING THE MACHINING PROCESS

Thi –Hoa Pham; Xuan – Hung Do; Huu – Chuyen Vu

Thi –Hoa Pham Faculty of Mechanical Engineering, Hung Yen University of Technology and Education
Xuan – Hung Do Faculty of Mechanical Engineering, Hung Yen University of Technology and Education
Huu – Chuyen Vu Faculty of Mechanical Engineering, Hung Yen University of Technology and Education

Keywords: A7075 aluminum alloy, Microhardness, Chip Shrinkage Coefficient

Abstract

A Study on the Influence of Cutting Parameters (V-Cutting Speed, S-Feed rate, t-Dept of cut)- on Chip Shrinkage Coefficient (K) and microhardness (HV) during the Machining of Aluminum Alloy A7075. Microhardness and chip shrinkage are parameters representing the outcomes of physical phenomena that occur during metal cutting. This study experimentally examines cutting parameters that affect K and HV under dry cutting conditions in low-speed cutting regions. The research findings demonstrate the impact of the parameters on HV and K, with parameter V exerting the greatest influence on both outputs. The study also encompasses the optimization of cutting parameters, intending to minimize both HV and K, resulting in the values of V = 500 m/min, S = 0.2 mm/rev, and t = 0.9 mm. This optimal parameter set contributes to ensuring the highest quality and productivity during the machining of A7075 aluminum alloy.

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