OPTIMIZATION OF THE EFFECT OF PROCESSING PARAMETERS  ON SURFACE ROUGHNESS AND MATERIAL REMOVAL RATE  IN CNC MILLING OF AL-7075 MATERIAL

Trần Công Chi; Lưu Văn Tuân; Nguyễn Văn Tựu; Trần Văn Tưởng

doi:10.34238/tnu-jst.6965

OPTIMIZATION OF THE EFFECT OF PROCESSING PARAMETERS ON SURFACE ROUGHNESS AND MATERIAL REMOVAL RATE IN CNC MILLING OF AL-7075 MATERIAL

About this article

Received: 22/11/22 Revised: 26/12/22 Published: 26/12/22

Authors

1. Tran Cong Chi , Vietnam National University of Forestry
2. Luu Van Tuan, Hanoi Mechanical and Electrical College
3. Nguyen Van Tuu, Vietnam National University of Forestry
4. Tran Van Tuong, Vietnam National University of Forestry

Abstract

This paper presents the results of the influence and optimization of some machining parameters on the surface roughness (Ra) and material removal rate (MRR) in the milling process of AL-7075 on the CNC machine. The signal ratio (S/N) in the Taguchi method and the analysis of variance (ANOVA) were selected to determine which machining parameters significantly and percentage contribution to Ra and MRR. Then, the response surface method (RSM) was used to optimize the multi-objective Ra and MRR criteria. The results show that machining parameters directly influence Ra and MRR. Specifically, Ra is significantly affected by spindle speed, feed rate, coolant, and depth of cut with percentages of 37.12%, respectively; 12.56%, 12.07%, and 10.13%, while MRR is mainly affected by feed rate, depth of cut with percentages of 41.68% and 47.29%. Finally, the results of multi-factor optimization analysis by RSM indicate that with the coolant condition (on), the feed rate 450 mm/min, depth of cut 0.369 mm, and spindle speed 5500 r/min obtain the optimum value of Ra and MRR are 0.159 µm and 32.019 g/min, respectively.

Keywords

Machining parameter; Optimization; Surface roughness; Material removal rate; AL-7075

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References

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DOI: https://doi.org/10.34238/tnu-jst.6965

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