Pengaruh Plunge Rate dan Axial Depth of Cut Pada Proses Pocket CNC Milling Terhadap Keausan Pahat dan Kekasaran Permukaan Benda Kerja

Tiara, Ghita (2023) Pengaruh Plunge Rate dan Axial Depth of Cut Pada Proses Pocket CNC Milling Terhadap Keausan Pahat dan Kekasaran Permukaan Benda Kerja. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Operasi pocket pada CNC milling sebagai salah satu proses penghilangan logam yang mendasar sangat umum digunakan pada pembuatan mould dan dies, dimana kualitas produksi menuntut toleransi dan hasil permukaan akhir yang baik. Kualitas akhir produk ini ditentukan oleh beberapa parameter pemotongan. Situasi ini yang kemudian akan menentukan umur pahat berdasarkan kondisi pemotongan dan keausan pahat yang terjadi pada proses pemesinan. Pada penelitian ini, dilakukan studi eksperimen mengenai pengaruh plunge rate dan axial depth of cut pada proses pocket terhadap keausan pahat jenis HSS dan kekasaran permukaan benda kerja dengan material baja ST 37. Variasi parameter plunge rate yang digunakan pada penelitian ini yakni sebesar 25%, 30%, dan 35% dari kecepatan pemakanan. Sementara untuk axial depth of cut digunakan sebesar 10%, 12.5%, dan 15% dari diameter pahat potong. Respon yang diamati dalam penelitian ini adalah keausan pahat dan kekasaran permukaan benda kerja. Analisa data eskperimen dilakukan melalui pengolahan data statistik menggunakan analisis variansi (ANAVA) dan regresi. Hasil ANAVA menyatakan bahwa plunge rate dan axial depth of cut memberikan pengaruh signifikan pada tingkat kepercayaan 5% terhadap keausan pahat dengan presentase secara berturut-turut 16% dan 24,6%. Nilai aus pahat terbesar diperoleh pada plunge rate 57.75 mm/min dan axial depth of cut 1.5 mm. Nilai aus pahat terkecil diperoleh pada plunge rate 41.25 mm/min dan axial depth of cut 1.00 mm. Untuk respon terhadap kekasaran permukaan, axial depth of cut memberikan pengaruh yang lebih signifikan dibandingkan plunge rate. Hasil kekasaran permukaan paling baik diperoleh pada plunge rate 49.5 mm/min dan axial depth of cut 1.00 mm. Hasil uji interaksi menyatakan tidak ada pengaruh signifikan, artinya tidak terdapat interaksi antara kedua faktor terhadap respon keausan pahat dan kekasaran permukaan.
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Pocket operation in CNC milling as one of the fundamental metal removal processes is very commonly used in the manufacture of molds and dies, where the required production quality demands good tolerance and surface finish. The final product quality is determined by various cutting parameters. This circumstance will then determines the tool life based on the cutting conditions and tool wear that occur during the machining process. In this research, an experimental study was conducted on the effect of plunge rate and axial depth of cut in pocket CNC milling process on tool wear and workpiece surface roughness with ST 37 steel material. The plunge rate parameter variations used in this study are 25%, 30%, and 35% of the feed rate. While the axial depth of cut used are 10%, 12.5%, and 15% of the cutting tool diameter. The observed responses were tool wear and workpiece surface roughness. Experimental data were analyzed through statistical data processing using analysis of variance (ANOVA) and regression. The ANOVA results showed that plunge rate and axial depth of cut had a significant effect at the 5% confidence level on tool wear with a percentage of 16% and 24.6%, respectively. The largest tool wear value was obtained at a plunge rate of 57.75 mm/min and axial depth of cut of 1.5 mm. The smallest tool wear value was obtained at plunge rate 41.25 mm/min and axial depth of cut 1.00 mm. For the response to surface roughness, axial depth of cut has a more significant effect than plunge rate. The best surface roughness results were obtained at a plunge rate of 49.5 mm/min and axial depth of cut of 1.00 mm. The interaction results stated that there was no significant effect, meaning that there was no interaction between the two factors on the response of tool wear and surface roughness.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	pocket CNC milling, plunge rate, axial depth of cut, keausan pahat, kekasaran permukaan, tool wear, surface roughness.
Subjects:	T Technology > TS Manufactures T Technology > TS Manufactures > TS176 Manufacturing engineering. Process engineering (Including manufacturing planning, production planning)
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering
Depositing User:	Ghita Tiara
Date Deposited:	04 Aug 2023 03:38
Last Modified:	05 Sep 2023 01:02
URI:	http://repository.its.ac.id/id/eprint/102017

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