Al 5052 alaşımının Lazer Kesiminde Kerf Oluşumunu ve Yüzey Pürüzlülüğünü Etkileyen Kesme Parametrelerinin Çoklu Optimizasyonu

Öz

Lazer ile yapılan kesmelerde kesilen malzemeye göre uygun kesme parametreleri seçilmelidir. Yanlış seçilen parametreler, kesilen levhalarda ölçü tamlığını ve yüzey kalitesini olumsuz etkilemektedir. Bu çalışmada, 3 mm kalınlığındaki Al 5052 levha, lazer kesme operasyonu ile kesilmiştir. Kesilen levhalardaki kerf oluşumu ve yüzey pürüzlülüğü incelenmiştir. Daha az deney ile optimum sonuçları elde edebilmek için Taguchi metodu ile L18 (21x32) deney tasarımı yapılmıştır. Kesme esnasında azot gazı kullanılmıştır. Kesme parametreleri olarak 9 ve 12 bar gaz basıncı, 3000-4000-5000 mm/min kesme hızı ve 2500-3000-3500 W lazer gücü seçilmiştir. Deneyler sonunda üst kerf genişliği (KWT), alt kerf genişliği (KWB), kerf koniği (KT) ve yüzey pürüzlülüğü (Ra) ölçülmüştür. Minimum değerlerde optimum parametrelerin tespiti için Taguchi ve çoklu analiz yapılmıştır. KWB ve KT için en etkin parametre CS çıkmıştır. KWT ve Ra için ise en etkin parametre P olmuştur. Çoklu optimizasyon sonunda ideal kesme parametreleri GP 10,1029 bar, CS 5000 mm/min and P 2500 W olarak bulunmuştur.

Anahtar Kelimeler

• Al 5052
• lazer kesim
• kerf oluşumu
• yüzey pürüzlülüğü
• Taguchi
• çoklu optimizasyon

Multiple Optimization of Cutting Parameters Affecting Kerf Formation and Surface Roughness in Laser Cutting of Al 5052 Alloy

Öz

In cutting with laser, appropriate cutting parameters should be selected according to the material being cut. Incorrectly selected parameters affect the dimensional accuracy and surface quality of the cut sheets. In this study, 3 mm thick Al 5052 sheet was cut with laser cutting operation. Kerf formation and surface roughness of the cut sheets were investigated. In order to obtain optimum results with fewer experiments, L18 (21x32) experimental design was made with the Taguchi method. Azote gas was used during cutting. 9 and 12 bar gas pressure, 3000-4000-5000 mm/min cutting speed and 2500-3000-3500 W laser power were selected as cutting parameters. At the end of the experiments, the upper kerf width (KWT), lower kerf width (KWB), kerf taper (KT) and avarage surface roughness (Ra) were measured. Taguchi and multiple analysis were performed to determine the optimum parameters at minimum values. CS was the most effective parameter for KWB and KT. For KWT and Ra, the most effective parameter was P. At the end of the multiple optimizations, the ideal cutting parameters were found as GP 10,1029 bar, CS 5000 mm/min and P 2500 W.

Anahtar Kelimeler

• Al 5052
• laser cutting
• kerf formation
• surface roughness
• Taguchi
• multiple optimization

Kaynakça

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