SO SÁNH PHƯƠNG PHÁP TOPSIS VÀ DFA TRONG TỐI ƯU HÓA QUÁ TRÌNH PHAY THÀNH MỎNG VẬT LIỆU NHÔM 6061

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Tác giả: Tiến Dũng Hoàng, Ngọc Duy Lê, Văn Cảnh Nguyễn, Văn Quê Nguyễn, Thị Thiều Thoa Phạm

Ngôn ngữ: vie

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Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Trường Đại học Công nghiệp Hà Nội, 2023

Mô tả vật lý: tr.60

Bộ sưu tập: Metadata

ID: 346864

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Bài báo này trình bày về ứng dụng phương pháp TOPSIS trong việc giải bài toán tối ưu hoá đa mục tiêu khi phay tinh thành mỏng vật liệu nhôm 6061. Các tham số công nghệ của quá trình phay bao gồm vận tốc cắt (Vc), lượng tiến dao răng (fz) và chiều rộng lát cắt (ar) đã được nghiên cứu để đưa ra đánh giá mức độ ảnh hưởng đến các tiêu chí chất lượng của sản phẩm bao gồm độ nhám bề mặt Ra, sai lệch độ phẳng FD và năng suất bóc tách vật liệu MRR. Trong nghiên cứu này, phương pháp tối ưu hóa đa mục tiêu TOPSIS được sử dụng để lựa chọn bộ tham số công nghệ phù hợp nhằm mục đích tối ưu hóa các giá trị Ra, FD và MRR đồng thời. Kết quả nghiên cứu thực nghiệm với TOPSIS cho thấy giá trị độ nhám Ra, độ không phẳng FD và năng suất bóc tách vật liệu MRR đạt giá trị tối ưu là 0,345µm
0,131mm và 25796,18 (cm3/ph) tương ứng là vận tốc cắt 150m/ph
lượng chạy dao răng 0,06 (mm/răng) và chiều sâu cắt 1,2 (mm). Kết quả tối ưu hóa bằng phương pháp TOPSIS cũng được so sánh với phương pháp tiếp cận hàm số mong muốn DFA để đánh giá ưu, nhược điểm và khả năng ứng dụng của các phương pháp này trong nghiên cứu cũng như trong thực tế sản xuất. Theo đó, kết quả tối ưu hóa với DFA dự đoán giá trị độ nhám Ra giảm 57% còn 0,145µm, độ không phẳng giảm khoảng 154% về còn 0,07mm, tuy nhiên năng suất gia công cũng giảm 23%.This paper presents the application of TOPSIS method in solving the multi-objective optimization problem in thin-walled milling of the 6061 aluminum. The cutting parameters of the milling process include cutting speed (Vc), the feed rate (fz) and the wide of cut (ar) were studied to determine their influence on the quality evaluation criteria of the product including surface roughness (Ra), flatness deviation (FD) and material removal rate (MRR). In this study, the TOPSIS is used to find the optimal cutting parameters set in order to achieve the goal of minimizing the values Ra, FD and maximize MRR, simultaneously. Accordingly, the optimization results using DFA predicted that the value of surface roughness Ra would decrease by 57% to 0.145µm, flatness would decrease by approximately 154% to 0.07mm. However, the machining productivity would also decrease by 23%.The optimization results by TOPSIS method are also compared with the Desirability Function Approach (DFA) method to evaluate the advantages, disadvantages and applicability of these methods in research as well as in actual production. Thus, the optimization results using DFA predicted that the value of surface roughness Ra would decrease by 57% to 0.145µm, flatness would decrease by approximately 154% to 0.07mm. However, the machining productivity would also decrease by 23%.

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