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All Journal Jurnal Ilmiah Teknik Mesin "MEKANIK"
Surya Murni Yunus
Institut Teknologi Medan, Jl. Gedung Arca No 52, Medan 20217
Automotive Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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MEKANISME KEGAGALAN PAHAT PADA PROSES MILLING AKIBAT ALIRAN SERPIHAN PEMESINAN KECEPATAN TINGGI AISI 4140 Saputra, Aswin; Yunus, Surya Murni
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 3 No 2 (2017): November 2017
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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Abstract

The mechanism of tool failure is the way to wear wear damage on the tool. This study aims to investigate the mechanism of tool wear / tool wear (Vb) which is useful to provide information on the wear mechanism of the tool in a high-speed, dry machining process with a HSS Cobalt M42 tool used for machining milling of AISI 4140 steel material. the cutting speed (v) differs above 200 m / min, the cutting depth (a) = 0.5 mm, the feeding motion (f) = 0.5 mm / min and the main cutting angle of the tool (Kr) = 90 ° at the rate condition high speed cutting. From the results of the study the mechanism of tool failure that occurs is side wear. Where the highest wear wear occurs in conditions v = 755 m / min, f = 0.5 mm / min, a = 0.5 mm, with flake thickness (hc) = 0.88 mm and flake flow velocity (Vc) = 431.42 m / where the value of Vb = 0.325 mm. The wear mechanism that occurs due to the flow of debris that moves upward touches the cutting edge of the tool with the shape of the broken debris.
KARAKTERISTIK UMUR PAHAT PADA PROSES MILLING TERHADAP PEMESINAN KERING AISI 4140 Harianja, Ivan Andri; Yunus, Surya Murni
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 3 No 2 (2017): November 2017
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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Abstract

Tool life is a machining data that is very important in machining planning. Characteristics of tool life is a function of the thickness of the chips, temperature and flow velocity of the debris. If the thickness of the flakes is greater, the temperature will be higher while the flow rate of the flakes will be lower than the cutting speed so that the tool wear / tool life is obtained. The research was conducted by observing the effect of cutting conditions, where the cutting speed was varied while other cutting conditions, such as feeding motion, infeed depth and fixed cutting time. The purpose of this study was to determine the HSS tool life with AISI 4140 steel. 755 m / min, f = 0.5 mm / put, a = 0.5 mm, that the tool wear (Vb) obtained is 0.325 mm, the value can be said that the tool wear / tool life limit has been reached, because according to ISO 3685 tool life wear limit is 0.3 mm.
AUS SISI PAHAT CM T5115 PADA POSES PEMESINAN LAJU RENDAH SAMPAI TINGGI PADA BAHAN JIS GRADE DF-3 Tarigan, Janri Bastanta; Yunus, Surya Murni
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 3 No 1 (2017): Mei 2017
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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The manufacturing industry faces a paradigm in increasing productivity. Besides that that must be a concern, namely the environmental impact due to the production process, for that the metal cutting industry tries to implement environmentally friendly cutting methods. This study aims to analyze tool wear (Vb) that is useful to provide characteristic information and wear mechanism on the dry machining process , low and high speed cutting, carbidatipe chisel VNMG 332 CM T5115 Tungaloy production is used for turning the JIS GRADE DF-3 steel material, to get tool failure mode and tool wear mechanism against cutting temperature. Machining is done by machining the low and high rate cutting where the cutting speed varies (v), the cutting depth (a) and the feeding motion (f) at the maximum cutting rate condition. The lowest tool wear occurs in JIS GRADE DF-3 steel material, in the low rate machining process with the first treatment where v = 137 m/min, f = 0.50 mm, a = 1.00 mm, Aus Tool (Vb) = 0.075 mm and the highest wear wear occurred in the steel material JIS GRADE DF-3 in the high-speed machining process with the fourth treatment where v = 256 m / min, f = 0.50 mm, a = 1.00 mm, wear tool (Vb) = 0.522 mm. From the results of the characteristics of the tool failure method that occurs is worn out side. Judging from the wear of the tool to the cut temperature the wear of the tool occurs due to the influence of the depth of cut (a), cutting speed (v) and sticking furiously on the tool's eye.
PERBANDINGAN KEKERASAN DAN STRUKTUR MIKRO MATERIAL CRANK SHAFT SEPEDA MOTOR BEBERAPA MERK suherman, suherman; Yunus, Surya Murni; K, Sitorus M
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 4 No 1 (2018): Mei 2018
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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Abstract

Tujuan dari penelitian ini adalah untuk mengetahui perbedaan struktur mikro, komposisi kimia, dan nilai kekerasan crank shaft sepeda motor berbagai merk. Crankshaft dengan beberapa merk dengan perbedaan Negara pembuat selanjutnya dipotong searah melintang untuk diamati struktur mikro menggunakan mikroskop optik, pengujian komposisi kimia menggunakan spectrometer analisis dan pengujian kekerasan pada specimen uji menggunakan metode Rockwell. Hasil penelitian menunjukkan komposisi kimia dari crank shaft sepeda motor seluruhnya terbuat dari baja karbon sedang. Struktur mikro ketiga crank shaft berbeda-beda, yaitu crank shaft merk H dan merk M memiliki bentuk fasa martensetite dan bainite dan crank shaft sepeda motor T struktur mikro didominasi fasa pearlite dan ferrite. Nilai kekerasan yang paling tinggi pada crank shaft dengan merk H (28,6 HRC). Nilai kekerasan paling rendah adalah pada merk T dengan nilai kekerasan 21,4 HRC.
PENGARUH GETARAN PAHAT TERHADAP AUS PAHAT KARBIDA H10 N15 MENGGUNAKAN BAHAN PERMESINAN AISI 4140 Siregar, Muhammad Yakub; Yunus, Surya Murni
MEKANIK: Jurnal Ilmiah Teknik Mesin Vol 6 No 1 (2020): Mei 2020
Publisher : Jurusan Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Medan (ITM)

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh getaran pahat terhadap aus pahat (VB) menggunakan pahat karbida DcGx 11 T3 04 Al H10 produksi sandvick coromount digunakan untuk pembubutan bahan baja AISI 4140, permesinan dilakukan dengan pemotongan kering dengan variasi kecepatan potong (V), gerak makan (f), kedalaman potong (a), pada kondisi laju pemotongan maksimum dan minimum dapat diketahui dari hasil penelitian getaran pahat dan aus pahat. Getaran pahat tertinggi pada perlakuan V = 250 m/ menit, f = 0,1 mm/putaran, a = 0,5 mm dimana getaran pahat 0,58 Hz, dan getaran pahat terendah V = 200 m/ menit, f = 0,1 mm/putaran, a = 0,5 mm dimana getaran pahat 0,32 Hz. Sedangkan aus pahat tertinggi pada perlakuan V = 250 m/ menit, f = 0,1 mm/putaran, a = 0,5 mm dimana aus pahat (VB) = 3,075 mm, dan aus pahat terendah V = 200 m/ menit, f = 0,05mm/putaran, a = 0,25 mm dimana aus pahat (VB) = 0,328 mm. Semakin tinggi Kecepatan potong (V), Gerak makan (f), dan kedalaman potong (a) maka getaran pahat akan semakin tinggi sehingga akan mempercepat keausan yang terjadi pada pahat. Kata Kunci : Getaran pahat, aus pahat, karbida DCGX 11 T3 04 –AL H10, AISI 4140.
Co-Authors Harianja, Ivan Andri K, Sitorus M Saputra, Aswin Siregar, Muhammad Yakub Syamsul Arifin Tarigan, Janri Bastanta