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All Journal Jurnal Mekanik Terapan JURNAL POLI-TEKNOLOGI
Darius Yuhas
Politeknik Negeri Jakarta
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Pengaruh Parameter Arus Discharge dan Elektroda Terhadap Nilai MRR Pada Proses Sinker EDM Material AISI Lisbhet Engelita; Darius Yuhas; Muslimin Muslimin
Jurnal Mekanik Terapan Vol 1 No 1 (2020): Mei 2020
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v1i1.3332

Abstract

Electrical Discharge Machining (EDM) adalah proses permesinan non-konvensional yang menggunakan energi thermal berupa loncatan bunga api listrik bertemperatur tinggi 10.000˚C-12.000˚C di antara pahat dan benda kerja sebagai media pemotongannya. Proses EDM digunakan untuk pemotongan material yang sangat kuat dan keras. Proses EDM menghasilkan kepresisian tinggi untuk bentuk produk yang rumit dan kualitas permukaan yang baik. Proses EDM dipengaruhi oleh material yang diproses, material elektroda, arus discharge, tegangan, pulse on time (PON), pulse off time (POFF), spark gap, cairan dielektrik dan sebagainya. Kombinasi parameter tersebut akan menghasilkan karakteristik hasil pemotongan yang berbeda-beda. Penelitian ini bertujuan untuk mencari kombinasi parameter optimum proses EDM punches dari bahan AISI 316. Variable bebas penelitian adalah arus discharge (12A, 21A, 30A) dan elektroda (Tembaga dan Graphite). Variabel tetap yang digunakan PON 120 µs, POFF 3 µs, tegangan 45 V, cairan dielektrik CPC kerosene, material AISI 316, jenis mesin EDM sinker SKM EDM Politeknik Negeri Jakarta. Variable kontrol yaitu nilai MRR. Berdasarkan penelitian, nilai MRR tertinggi 0.775 gram/min dan terendah 0.175 gram/min. Parameter arus discharge dan elektroda merupakan variable yang paling berpengaruh terhadap nilai MRR.
Perancangan Drilling Jig dengan Adjustable V-Block untuk Pengeboran Tangkai Drill Chuck Mesin Bor Koordinat 22 STA Ilham Akmal; Hamdi Hamdi; Darius Yuhas
Jurnal Mekanik Terapan Vol 3 No 1 (2022): April 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/jmt.v3i1.4546

Abstract

The drill machining process requires the drill chuck shank as a coupler between the drill chuck and the drilling machine spindle. Limited availability of drill chuck shank especially for coordinate drilling machine 22 STA is the problem faced. The purpose of the design is to get a replacement of drill chuck shank because on the market that thing is difficult to obtain. The design methods include: the design of special device for placing the drill chuck shank in parallel position to the horizontal axis that is drilling jig with adjustable v-block to adjust the taper of the shank,machining a drilling jig with adjustable v-block, and trial drilling of eight holes on body of drill chuck shank. The real result obtained is drilling jig with adjustable v-block which can be used to make eight holes on body of drill chuck shank coordinate drilling machine 22 STA.
ANALISA VARIASI KUAT ARUS ELEKTRODA E6013 TERHADAP SAMBUNGAN LAS PADA PELAT BAJA UNTUK TABUNG GAS 3 KG Rosidi Rosidi; Budi Yuwono; Darius Yuhas
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2341

Abstract

The quality of the welding results is influenced by the qualified welder, the appropriate type of connection, the type of welding, and the electrode. Standard electrode AWS E 6013 with trademark Nikko Steel Welding Elektodes, NK 68 with φ 2.6 mm. The type of camp used is SNI standard 1452-2007 for 3 kg LPG tube. Specimens were subjected to tensile testing, impact toughness, hardness testing, curvature testing, microstructure with current variations of 50 A and 70 A of both types of electrodes used. Welding by SMAW method with circular welding at 3 kg of gas tube blank from JIS G 3116 SG 295 materials. From the test result will be known maximum tensile strength, impact toughness, hardness, curve strength, macro and microstructure. And by comparing the samples of SNI, non SNI and samples from both types of Nikko Steel and NK 68 electrodes, there are differences in mechanical and microstructure characteristics that will significantly affect the toughness of the welding results. 
Co-Authors Budi Yuwono Hamdi Hamdi Ilham Akmal Lisbhet Engelita Muslimin Muslimin Rosidi Rosidi