True Variable-Depth Milling of Nickel-Based Alloy IN-718

Öz

Rapid tool wear in machining causes increased process cost. While flank wear and crater wear have been investigated deeply by researchers, notch wear has been somewhat overlooked, despite the fact that it has an important role in the tool replacement decision. Notch wear happens due to impact forces at the depth of cut particularly during intermittent cutting. To avoid frequent tool change decisions, varying the depth of cut constantly during machining has been proposed as an alternative. In this study, milling experiments were conducted on the nickel-based alloy IN-718 where the depth of cut was varied throughout the cut. Results show favorable findings towards eliminating notch wear without compromising from machining efficiency.

Anahtar Kelimeler

• Milling
• Variable depth milling
• Tool wear
• Nickel-based alloy
• Notch wear

Nikel-Bazlı Alaşımlarda (IN-718) Gerçek Değişken-Derinlikli Frezeleme

Öz

Metal işleme sırasında takımın hızlı aşınması artan proses maliyetine neden olur. Kanat aşınması ve krater aşınması literatürde derinlemesine incelenirken, takım değiştirme kararında önemli bir rol oynayan çentik aşınması ikinci plana itilmiştir. Çentik aşınması, özellikle aralıklı kesim sırasında kesme derinliğindeki darbe kuvvetleri nedeniyle meydana gelir. Takımı sık değiştirmemek için alternatif olarak işleme sırasında kesme derinliğinin sürekli olarak değiştirilmesi önerilmiştir. Bu çalışmada, nikel-bazlı IN-718 alaşımında kesme derinliğinin kesim boyunca değiştiği frezeleme deneyleri gerçekleştirilmiştir. Sonuçlar, işleme verimliliğinden ödün vermeden çentik aşınmasını ortadan kaldırmaya yönelik olumlu bulgular göstermektedir.

Anahtar Kelimeler

• Frezeleme
• Değişken-derinlikli frezeleme
• Takım aşınması
• Nikel-bazlı alaşımlar
• Çentik aşınması

Kaynakça

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