PENGARUH HIGH FEED MACHINING DAN RADIAL DEPTH OF CUT PADA PROSES TROCHOIDAL CNC MILLING TERHADAP KEAUSAN FLUTE PAHAT ENDMILL HSS DAN KEKASARAN PERMUKAAN ALUMUNIUM 6061

Oktaviana, Zahra (2024) PENGARUH HIGH FEED MACHINING DAN RADIAL DEPTH OF CUT PADA PROSES TROCHOIDAL CNC MILLING TERHADAP KEAUSAN FLUTE PAHAT ENDMILL HSS DAN KEKASARAN PERMUKAAN ALUMUNIUM 6061. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan inovasi teknologi dalam pemesinan CNC semakin berkembang, sehingga diperlukan penelitian untuk memahami pengaruhnya terhadap kualitas akhir produk demi efisiensi. Penelitian ini mendalami pengaruh dari metode trochoidal CNC milling terhadap keausan pahat dan kekasaran permukaan dengan dengan variasi feed rate dan radial depth of cut. Menurut Karkalos et al. (2021), kualitas permukaan yang baik dapat dicapai meskipun nilai feed meningkat, dan peningkatan radial depth of cut berkorelasi linear dengan peningkatan kekasaran permukaan. Oleh karena itu, kedua parameter ini menjadi fokus utama penelitian. Trochoidal milling bertujuan membuat slot lebih lebar dari diameter pahat dalam aspek lebar slot sebesar maksimal 70% dari diameter pahat. Penelitian ini membuat slot 14,3 mm dengan pahat endmill HSS 10mm pada benda kerja alumunium 6061 ukuran 35x23x30mm. Feed rate divariasikan menjadi 1000, 1500, dan 2000 mm/min, serta radial depth of cut 1 mm (10%), 1,5 mm (15%), dan 2 mm (20%) dari diameter pahat. Parameter lainnya dijaga konstan: axial depth of cut 10 mm, spindle speed 6366 rev/min, dan cutting speed 200 mm/min. Pengukuran keausan pahat dilakukan dengan mikroskop USB digital dengan area pengukuran difokuskan pada flute pahat vertikal dan horizontal, sementara kekasaran permukaan diukur menggunakan Mitutoyo surftest SJ-210. Hasil penelitian selanjutnya dilakukan analisis secara statistik dengan ANOVA dan regresi menunjukkan feed rate dan radial depth of cut berpengaruh signifikan terhadap keausan pahat vertikal (51,2% dan 15,1%) dan horizontal (61,5% dan 20,1%) pada interval kepercayaan 5% sedangkan, interaksi antar keduanya tidak berpengaruh signifikan terhadap keausan pahat baik vertikal maupun horizontal. Nilai aus pahat terbesar ditemukan pada feed rate 2000 mm/min dan radial depth of cut 20% sedangkan, terkecil pada feed rate 1000 mm/min dan radial depth of cut 10%. Pada kekasaran permukaan nilai paling baik ditemui pada feed rate 1000 mm/min dan radial depth of cut 10% dan 20%. Selanjutnya, feed rate dan radial depth of cut tidak berpengaruh signifikan secara individu maupun interaksi terhadap kekasaran permukaan. Hal ini menunjukkan bahwa peningkatan feed rate dan radial depth of cut yang lebih besar tidak mempengaruhi kekasaran permukaan secara signifikan, sehingga pada trochoidal milling, hasil permukaan yang baik tetap dapat dicapai meskipun feed rate dan radial depth of cut meningkat.
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The development of technological innovation in CNC machining is continuously advancing, necessitating research to understand its impact on the final product quality for efficiency purposes. This study explores the influence of the trochoidal CNC milling method on tool wear and surface roughness, with variations in feed rate and radial depth of cut. According to Karkalos et al. (2021), a good surface quality can be achieved even with an increased feed rate, and the increase in radial depth of cut correlates linearly with the increase in surface roughness. Therefore, these two parameters are the primary focus of this research. Trochoidal milling aims to create a slot wider than the diameter of the tool, with a slot width aspect of up to 70% of the tool diameter. This research involves creating a 14.3 mm slot using a 10 mm HSS endmill on a 6061- aluminum workpiece measuring 35x23x30 mm. The feed rate is varied to 1000, 1500, and 2000 mm/min, and the radial depth of cut to 1 mm (10%), 1.5 mm (15%), and 2 mm (20%) of the tool diameter. Other parameters are kept constant: axial depth of cut at 10 mm, spindle speed at 6366 rev/min, and cutting speed at 200 mm/min. Tool wear measurements are conducted using a USB digital microscope, focusing on the vertical and horizontal flute areas, while surface roughness is measured using a Mitutoyo Surftest SJ-210. Statistical analysis through ANOVA and regression shows that feed rate and radial depth of cut significantly affect vertical (51.2% and 15.1%) and horizontal (61.5% and 20.1%) tool wear at a 5% confidence interval, while their interaction does not significantly affect tool wear in either direction. The highest tool wear value is observed at a feed rate of 2000 mm/min and a radial depth of cut of 20%, while the lowest at a feed rate of 1000 mm/min and a radial depth of cut of 10%. The best surface roughness value is found at a feed rate of 1000 mm/min and a radial depth of cut of 10% and 20%. Furthermore, feed rate and radial depth of cut do not significantly affect surface roughness either individually or interactively. This indicates that increasing feed rate and radial depth of cut does not significantly impact surface roughness, suggesting that in trochoidal milling, good surface results can still be achieved even with increased feed rate and radial depth of cut.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CNC, Keausan pahat, Kekasaran permukaan, High feed machining, Radial Depth of Cut, Trochoidal milling
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ1225 Milling machines numerically controlled T Technology > TS Manufactures
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Zahra Oktaviana
Date Deposited:	07 Aug 2024 01:21
Last Modified:	07 Aug 2024 01:21
URI:	http://repository.its.ac.id/id/eprint/111991

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