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In this study, we performed experimental and statistical analysis on the cutting of AISI 304 stainless steel using a commonly utilized laser cutting machine. Three different gas pressures (5.1, 6.4 and 8 bar), three different cutting speeds (2048, 2560 and 3200 mm/min), fixed focal point (-4 mm), fixed frequency (5000 Hz) and fixed gas (Nitrogen) were used as cutting parameters. As a result of the study, it was observed that the surface roughness decreased as the cutting speed increased at all pressure values, and the surface roughness increased as the pressure increased at all cutting speed values. It was determined that the top and bottom kerf width decreased with increasing cutting speed and decreasing gas pressure, and the top and bottom kerf width increased with increasing gas pressure and decreasing cutting speed. When the signal/noise ratios were analyzed as a result of Taguchi analysis, the optimum cutting parameter was calculated as Level 1 (5.1 bar) for pressure and Level 3 (3200 mm/min) for cutting speed. When the variance results were analyzed, it was determined that the important parameter affecting the surface roughness from the pressure and cutting speed factors was determined as cutting speed with 70.74%. [ABSTRACT FROM AUTHOR]

Bu çalışmada, kuru frezeleme koşullarında üç farklı takım geometrisine sahip CVD TiAlN/Al2O3/TiCN kaplı karbür uçlar kullanılarak AISI 316L’nin yüzey bütünlük özelliklerini değerlendirmek için Taguchi yöntemi uygulanmıştır. Bir CNC tornada ortogonal dizili bir deneysel tasarım olan L18 (2x3x3x3) kullanılarak çeşitli deneyler yapılmıştır. İşleme parametrelerinin ortalama yüzey pürüzlülüğü, çevresel ve eksenel yüzey kalıntı gerilmeleri ve işleme sertleşmesi derecesi üzerindeki etkilerini belirlemek için varyans analizi (ANOVA) kullanıldı. İşleme parametreleri olarak kesme derinliği, kesici takım geometrisi, kesme hızı ve ilerleme hızı seçilmiştir. İşleme parametrelerinin kalite özellikleri üzerinde farklı etkileri olduğu görülmüştür. Kesme derinliği, yüzey pürüzlülüğü üzerinde nispeten etkili bir parametreydi ve diğer kalite özellikleri üzerinde önemli bir etkisi yoktu. Takım geometrisi ortalama yüzey pürüzlülüğünü etkilemedi. Ancak sırasıyla sertleşme derecesi, çevresel ve eksenel yüzey kalıntı gerilmeleri üzerinde daha etkili olmuştur. Kesme hızının sırasıyla eksenel ve çevresel yüzey kalıntı gerilmeleri ve sertleşme derecesi üzerinde daha önemli bir etkiye sahip olduğu belirlendi. İlerleme hızı, yüzey pürüzlülüğü üzerinde çok yüksek bir etkiye sahipken, sırasıyla çevresel ve eksenel yüzey kalıntı gerilmeleri ve sertleşme derecesi üzerinde de önemli bir etkiye sahip olduğu görülmüştür.

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In this study, effects of cemented carbide coated with TiC+TiN, coated with TiC, uncoated and CBN on the machinability of AISI 410 martensitic stainless steel was investigated. In the experiments chip root morphology, cutting forces and surface roughness were determined. Experiments were done in the dry turning conditions. The cutting speed, feed rate and depth of cut were kept constant as, 60 m/min, 0.12 mm/rev and 1.2 mm respectively. Cemented carbide tool coated with TiC+TiN gave maximum cutting forces. Although CBN gave the minimum cutting forces, it was observed that it fractured in a shorter machining length. The optimum values of cutting force and surface roughness were obtained from cemented carbide coated with TiC. [ABSTRACT FROM AUTHOR]

Copyright of Teknoloji is the property of Engineering Science & Technology, an International Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)