Haddeleme İşleminde Haddeleme Aparat Tipinin (Bilyeli,Makaralı, Çift Makaralı) Yüzey Pürüzlülüğü ve Yüzey Sertliğine Etkilerinin İncelenmesi

Haddeleme işlemi iyi yüzey kalitesi elde etmek için kullanılan bir sonlandırma operasyonudur. Haddeleme işlemi uygulandığı iş parçası yüzeyinde yüzey sertliğinin artması yüzey pürüzlülüğünün azalması, malzeme yorulmasına karşı direnç ve aşınma direnci gibi avantajlara sahiptir. Bu işlemde ana prensip malzeme yüzeyini ezmek olduğundan bu ezme mekanizması ve işlem parametreleri (uygulanan kuvvet, ilerleme miktarı ve paso sayısı) malzeme yüzeyi pürüzlülüğü ve sertliği üzerinde anahtar rol oynar. Bu çalışmada farklı parametreler kullanılarak (haddeleme kuvveti, ilerleme miktarı ve paso sayısı) haddeleme işlemi yapmak için üç farklı aparatın tasarımı ve imalatı gerçekleştirilmiştir. Al-6061-T6 malzemesi üzerinde bu parametrelerin etkileri yüzey sertliği ve yüzey pürüzlülüğüne bağlı olarak incelenmiştir. Çalışmada kullanılan aparatlarla elde edilmiş deney sonuçları birbiri ile karşılaştırılmıştır. Yapılan deneylerde yüzey pürüzlülüğü ve sertliği açısından en iyi performansı aparat 1 olarak isimlendirilen ucunda ezici olarak bilya kullanılan aparat ile elde edilmiştir.

In Burnishing Process, Inspectation of The Burnishing Apparaus (Ball, Roller, Twıst Roller) Effects on Surface Roughness and Surface Hardness

Burnishing process has been used as a finishing operation to obtain good surface quality. This process has been applied on work piece surface; it brings together some advantages such as increasing hardness, decreasing surface roughness, resistance against material fatigue and abrasion resistance. In this process, the main principal is crushing the surface of the material. For this reason, these crushing mechanics and process parameters (applied forces, feed rates and numbers of passes) have significant roles on material surface roughness and hardness. In this study, three different apparatus have been designed and manufactured in order to perform burnishing process used different parameters (burnishing force, feed rate and number of passes). The effect of these parameters on the material Al-6061 in terms of surface hardness and surface roughness has been investigated. The experimental results obtained with the apparatus used in the study were compared with each other. Best performance in terms of surface roughness and hardness of the experiments were obtained by as called apparatus 1 and used ball as crushing the tip of the apparatus.

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