Investigation of Dynamic Behaviors In Grooving Operations with Saw Milling Machines

Öz

Chatter encountered during slot milling operations is one of the factors that affects manufacturing. Vibration in this process; parameters such as material structure, machinability parameters, spindle, cutting tool, tool holder and rigidity are affected. As a result, machine life, surface and dimensional quality of the workpiece, tool wear, etc. It is of critical importance in terms of outputs such as in this study, test samples made of AISI D2 hot work tool steel and AISI H13 cold work tool steel, prepared in accordance with TS ISO 8688 standard, were subjected to slot milling using HSS circular saw milling cutters (in accordance with DIN 1837A standard). Slot milling experiments were carried out at five different table feed rates without using coolant, keeping the speed and depth of cut constant. In this study, analytical, simulation and experimental stability analyzes were carried out on the test sample material processed with a circular saw tool using the same directional milling technique, taking into account the properties of the cutting tool. The workpiece frequency response response was evaluated as the basic parameter and each chip removal, frequency response response and stability diagrams were compared with the experimental results. In the study; Using a two-degree-of-freedom experimental setup, data were obtained from the change in workpiece and tool behavior resulting from machining through slot milling experiments. The data obtained as a result of the theoretical, simulation and experimental studies were interpreted. While the analytical and mathematical modeling results largely overlap, deviations have been observed in the experimental results

Anahtar Kelimeler

• Down milling
• Frequency response response
• Slot milling
• Chatter

Testere Frezelerle Kanal Açma İşlemlerinde Dinamik Davranışların İncelenmesi

Öz

Kanal açma işlemlerinde karşılaşılan tırlama, imalatı olumsuz yönde etkileyen faktörlerden birisidir. Bu süreçteki titreşim; malzeme yapısı, işlenebilirlik parametreleri, iş mili, kesici takım, takım tutucu ve rijitlik gibi parametreler etkilenmektedir. Elde edilen sonucunda tezgâh ömrü, iş parçasının yüzey ve boyut kalitesi, takım aşınması vb. gibi çıktılar yönünden kritik bir önem taşımaktadır. Bu çalışmada, TS-ISO-8688 standardına uygun olarak hazırlanan AISI-D2 sıcak iş takım çeliği ve AISI-H13 soğuk iş takım çeliği malzemeden deney numuneleri, HSS dairesel freze çakıları (DIN-1837A standardına uygun) kullanılarak, kanal frezeleme işlemine tabi tutulmuştur. Kanal frezeleme deneyleri, devir sayısı ve talaş derinliği sabit tutularak beş farklı tabla ilerleme hızı soğutma sıvısı kullanılmadan gerçekleştirilmiştir. Bu çalışmada, aynı yönlü frezeleme tekniği kullanılarak testere freze ile işlenen deney numunesi malzemesinin, kesici takımın özellikleri dikkate alınarak analitik, simülasyon ve deneysel kararlılık analizleri yapılmıştır. İş parçası frekans tepki cevabı temel parametre olarak değerlendirilerek oluşturulan, her talaş kaldırma, frekans tepki cevabı ve kararlılık diyagramları deney sonuçları ile kıyaslanmıştır. Çalışmada; iki serbestlik derecesine sahip deney düzeneğinde kanal frezeleme deneyleri ile de talaş kaldırmayla ortaya çıkan iş parçası ve takım davranışlarındaki değişiminden veriler elde edilmiştir. Yapılan teorik, simülasyon ve deneysel çalışmalar sonucunda elde edilen veriler yorumlanmıştır. Analitik ve matematiksel modelleme sonuçları büyük oranda örtüşürken, deneysel sonuçlarda sapmalar gözlemlenmiştir

Anahtar Kelimeler

• Aynı yönlü frezeleme
• Frekans tepki cevabı
• Kanal frezeleme
• Tırlama

Kaynakça

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