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All Journal AUSTENIT SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Media Mesin: Majalah Teknik Mesin Jurnal Rekayasa Mesin ASEAN Journal of Chemical Engineering AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) International Journal of Research in Vocational Studies (IJRVOCAS) MACHINERY: Jurnal Teknologi Terapan International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS)
Fatahul Arifin, Fatahul
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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PEMANFAATAN PEGAS DAUN BEKAS SEBAGAI BAHAN PENGGANTI MATA POTONG (PUNCH) PADA ALAT BANTU PRODUKSI MASSAL (PRESS TOOLS) Arifin, Fatahul; Wijianto, Wijianto
Media Mesin: Majalah Teknik Mesin Vol 9, No 1 (2008)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pengembangan teknologi di bidang material sangatlah pesat sekarang ini, hal ini terlihat dari banyaknya penggunaan material logam khususnya di industri produksi massal dengan spesifikasi tertentu, seperti baja tahan karat, baja karbon tinggi, dan baja perkakas. Pada industri kecil seperti pembuatan ring, panci, tutup botol, komponen kompor dan lain-lain sering menggunakan material tersebut sebagai bahan untuk membuat alat bantu yang disebut dengan Press Tools. Pada press tool ini banyak digunakan baja karbon tinggi atau baja perkakas sebagai mata potong (punch), tetapi seiring mahal dan sulitnya material-material tersebut membuat para pelaku industri kecil mengalami kerugian yang besar untuk pembuatan alat bantu produksi. Untuk itu melalui penelitian ini penulis mengadakan percobaan di laboratorium terhadap bahan pegas daun bekas. Percobaan dilakukan empat tahap pengujian yaitu uji komposisi, uji tarik, uji kekerasan, dan uji struktur mikro. Pada uji komposisi material pegas daun bekas mempunyai kadar 0,6627 % Carbon (C), 0,7304%, Mangan (Mn), 0.0240% Belerang (S), 0,0257% Phosphor (P). Kekuatan tarik pegas daun bekas adalah 1332,5 kg/mm2. Kekerasan dilakukan dengan uji kekerasan Rockwell C maka hasil dari ujinya adalah 52.5 HRC. Pada uji struktur mikro terdapat unsur martensit dan austenit. Pada akhirnya hasil percobaan laboratorium dibandingkan dengan data yang ada pada literatur maka material pegas daun bekas ini dapat digunakan untuk bahan pengganti mata potong pada alat bantu produksi massal.
Unjukkerja Electrolyzer tipe Dry Cell Terhadap Variasi Konsentrasi Elektrolit dan Arus Listrik pada Mesin PEM Fuel Cell Skala Kecil untuk Pembangkit Listrik Herlambang, Yusuf Dewantoro; Kurnianingsih, Kurnianingsih; Roihatin, Anis; Arifin, Fatahul
Jurnal Rekayasa Mesin Vol 16, No 3 (2021): Volume 16, Nomor 3, Desember 2021
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v16i3.3077

Abstract

Seiring peningkatan kebutuhan listrik di Indonesia serta menipisnya jumlah energi fosil dilakukan pengembangan energi baru terbarukan yang bebas polusi salah satunya yakni pemanfaatan energi hidrogen. Mesin fuel cell merupakan aplikasi pengembangan energi hidrogen yang dapat mengubah energi kimia menjadi energi listrik. Proton Exchange Membrane (PEM) fuel cell merupakan salah satu jenis fuel cell yang mampu beroperasi pada temperatur rendah dan menghasilkan efisiensi sekitar 40-60%. Pada penelitian sebelumnya kinerja dari mesin PEM fuel cell kurang maksimal, sehingga perlu dilakukan modifikasi pada bagian komponen HHO generator yakni dengan mengubah dari tipe wet cell menjadi dry cell. Pengubahan ini didasari kelemahan tipe wet cell dimana hasil debit gas hidrogen rentan tercampur dengan uap air akibat kenaikan temperatur pada larutan elektrolit sehingga menyebabkan terjadinya penguapan. Hasil dari modifikasi ini yakni debit gas hidrogen yang mana setelah dilakukan modifikasi pada arus masukan 20 A dan konsentrasi KOH 0,5 M terjadi peningkatan debit sebesar 0,306 mL/s, kemudian pada 1 M terjadi peningkatan debit sebesar 1,434 mL/s, serta pada 1,5 M meningkat sebesar 5,439 mL/s. Namun demikian meski debit HHO generator, yang mana daya masukan fuel cell, meningkat efisiensi dari fuel cell justru menurun karena maksimum tegangan keluaran fuel cell sesuai spesifikasi hanya mencapai 2,3 V - 3 V, sehingga daya input masukan fuel cell tinggi namun daya keluaran fuel cell tetap sesuai dengan spesifikasi yang tentunya mengakibatkan nilai efisiensi fuel cell menurun. Secara keseluruhan hasil tertinggi efisiensi dari HHO generator mencapai 85,86% sedangkan efisiensi fuel cell mencapai 4,6%.
Cross-flow Turbine Design with Taguchi Method Approach Wijaya Pratama, Agung; Arifin, Fatahul; Dewi, Tresna
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 3 No. 3 (2023): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v3i3.222

Abstract

The current energy demand is very large, while the use of energy, which mostly uses petroleum and coal, is not matched by the availability of energy sources. For this reason, it is necessary to conduct research on alternative energy in order to provide energy security in the future. One alternative energy is water energy, which uses water turbines. This study aims to determine the optimum conditions for design parameters for static pressure and magnitude speed in crossflow water turbine design. The testing was done using finite element method simulation, namely Autodesk CFD. Taguchi methodology analysis is used as an optimization method. The number of blades, blade angle, and water direction angle were set as design parameters with constant water discharge parameters. The resulting static pressure and magnitude velocity were observed as design criteria. The results of the Taguchi method analysis in this study show that the optimum static pressure received from the water turbine is at the number of blades, with 10 blades, a blade angle of 22°, and a water direction angle of 60°. While the optimum velocity of the water turbine is at the number of blades of 6, the blade angle is 20°, and the water direction angle is 60°.
Physical Properties Investigations of Natural Rubber Composites Using Cetyltrimethylammonium Bromide (CTAB) as Modifier of Local Clay Filler Hasan, Abu; Junaidi, Robert; Yerizam, Muhammad; Arifin, Fatahul
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.80712

Abstract

Improved absorption of rubber backbone on filler surfaces is necessary to enhance the physical properties of rubber vulcanizate. One of the ways to repair the surface of the filler is through modifying using surfactant. Hence, this study aims to compare the physical properties of natural rubber vulcanizates using clay filler and modified clay with cetyltrimethylammonium bromide (CTAB). The processes that were followed to achieve the objectives of this research were the design of rubber formulas, mastication and milling of rubber, and testing of the physical properties of rubber vulcanization. The clay characterization and its modification using FTIR and XRD were also carried out. Characterization using FTIR and XRD showed that there was indeed a clay modification with CTAB. Natural rubber compounds were also analyzed using SEM. The torque on the rheometer for modified clay with CTAB is 12.34 kg-cm higher than for original clay, which is 7.05 kg-cm. Elongation at break and tensile strength for vulcanizate using CTAB-modified clay filler is lower than that using original clay, with 300% modulus and hardness increase. Thus, clay modification using CTAB as a filler has a good effect on the curing characteristics and physical properties of natural rubber vulcanization compared to only using local clay as a filler.
ANALISA PENAMBAHAN VORTEX GENERATOR PADA KARAKTERISTIK AERODINAMIKA PADA DESAIN MOBIL CYBERTRUCK DENGAN METODE SIMULASI CFD Fahri, Fahri; Arifin, Fatahul; Martomi, Eka Satria
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 3 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14195767

Abstract

This study purpose to determine the effect of the Vortex Generator on the design of Cybertruck with variations in the fillet radius on the vortex side, namely 10 °, 20 ° and 30 °. The variations location of vortex generator speeds on 80 Km/h and 100 Km/h, The CFD analysis is simulated by ansys. The comparison results, were found that the Vortex Generator on the car model with a 20 ° fillet radius design placed at the front has an influence on reducing the drag coefficient, namely reducing the drag coefficient and force drag on the cybertruck with a cd of 0.45266866 and Fd of 481.77061 N at a speed of 80 Km/h then cd of 0.45201879 and Fd of 748.97953 N at a speed of 100 Km/h, That means the vortex generator was very influential in reducing CD and Fd on Cybertruck.
Design and Implementation of Solar Energy in ATG, CCDS and Pantry Maintenance Monitoring Systems Kamil, Muhammad Insan; Arifin, Fatahul; Dewi, Tresna
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 3 (2024): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i3.295

Abstract

This study aims to design, implement, analyze and evaluate the PV system used in the ATG, CCDS and Maintenance Pantry Monitoring Systems. This study was conducted at PT. Pertamina Patra Niaga, with data collection carried out from June 2024. As for the experimental design carried out to determine the reliability of the equipment made which will be used for ATG motoring, CCDS and Pantry Maintenance, this was carried out to reduce the consumption of fossil energy which has been used through Electricity from PLN. The research results show that the use of the PV system can work optimally, this can be seen from the results of observations, especially at its peak, namely on June 29 2024, namely 2106 watts with a maximum voltage of 84.2V and with the installation of MPPT to ensure there is no overcharging and regulate the input voltage at 29.2V. V to batteries, efficient and effective in replacing previously used conventional energy.
OPTIMIZATION OF PROCESS PARAMETERS IN 3D PRINTING FDM BY USING THE TAGUCHI AND GREY RELATIONAL ANALYSIS METHODS Arifin, Fatahul; Zamheri, Ahmad; Herlambang, Yusuf Dewantoro; Syahputra, Angga Panjy; Apriansyah, Icvan; Franando, Franando
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.1-10

Abstract

The 3D printing technology is one of the technologies that is developing currently. This machine can make products easily, quickly, and precisely. 3D printing is used to print models, prototypes/modeling, teaching aids for education, health support devices, product design, and many more in 3D shapes. Fused Deposition Modeling (FDM) is the most popular among others 3D printing techniques. In simple concept, it does not need maintenance regarding solvents or glue. The spare parts can be found easily and cheaply.  In this research, we create objects by using Autodesk inventor that is called human denture. Then, it converted to G-Code using Simplyfy3D software version 4.1.2. The G-Code data is used in the 3D printer for making the product. We select parameters to print the product. In this study, we find the optimal parameters of the effect of shrinkage and hardness of the product. The 3 parameters are in this study namely; layer height, print speed, temperature print. The material of human denture is filament PLA +. The Taguchi method and Grey analysis are used to analyze the data result. The results of the analysis for optimal parameters are at Layer Height 0.15 mm, Print Speed 25 mm/s, and Print Temperature 210⁰C.
OPTIMIZING THE PERFORMANCE OF WIND TURBINES USING EXHAUST GAS AT THE BORANG GAS POWER PLANT Fitrianza; Arifin, Fatahul; RS, Carlos
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 3 No. 2 (2025): IJMEAS - May
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v3i2.405

Abstract

As a renewable energy source, wind energy is one of the promising energies to be developed using wind turbines. The wind source to drive wind turbines comes from natural wind sources and exhaust wind from equipment. Palembang is one of the provinces in Indonesia with relatively low wind energy potential, with an average wind speed ranging from 1.5 to 3 m/s. However, at the PLTG Sematang Borang power plant owned by PT PLN, there is equipment that produces exhaust wind with a speed of 5 m/s. This study will compare the performance of Horizontal Axis Wind Turbines (HAWTs) and Savonius Vertical Axis Wind Turbines (VAWTs) to design wind turbines that can meet power generation needs and reduce operational power consumption.
ANALISIS PENGARUH SUDUT PUNCH TERHADAP PROSES V BENDING 90 DERAJAT Shangra, Kevin Dwiva; Arifin, Fatahul; Arnoldi, Dwi
MACHINERY Jurnal Teknologi Terapan Vol. 6 No. 2 (2025): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.17293847

Abstract

Springback in plate bending makes the bending angle results incompatible with the punch used due to the nature of steel material elasticity. This research aims to find an angle that is close to a 90-degree angle on ST 37 low carbon steel material using 6 punch pieces that vary with 3 different angles and 2 radii and 1 die. This bending test is carried out with the V bending process and uses a manual hydraulic press with a capacity of 2 tons as a press to perform the bending process. The test results on the material will be seen from the springback results and also the punch with what angle can produce an angle close to 90 degrees. The results of the punch angle of 90 radius 1 of 5 times testing the average value is 92.93 with a springback of 2.93 and the value that is very close to 90 degrees is at an angle of 87.80 radius 1 with a result of 89.95 degrees and to get the maximum angle results can use the springback formula after testing and from the springback results of the 92.93 angle results, it can be calculated and the result of the punch angle that must be used is 87.6 degrees. The result of v bending is quite close to the 90 degree angle of 89.80 degrees
STUDI PEMBUATAN BAGIAN ALAT REHABILITASI PENDERITA STROKE DENGAN PENDEKATAN METODE TAGUCHI Franando, Franando; Zamheri, Ahmad; Arifin, Fatahul
MACHINERY Jurnal Teknologi Terapan Vol. 1 No. 1 (2020): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (536.957 KB) | DOI: 10.5281/zenodo.4540849

Abstract

3D Printer is a solution to fulfill product demand that is custom design and not necessarily mass production. However, as long as the printing process produces a product that is not the same as the design size and has a fragile structure, there is a small deviation of dimensional accuracy and hardness value. This research focuses on dimensional accuracy and hardness of 3D Printer prints by using the design of one of the components of stroke rehabilitation tools, It aims to find a printing parameter component of a stroke rehabilitation tool that can have minimum dimensional accuracy and has a maximum hardness value. This study used Color Change Filament material for 3D printing with Taguchi data processing method and succeeded in reducing dimensional accuracy deviation with Layer Height percentage (52.225%), Print Speed of (15.432%) and Print Temperature amounting to (14.060%). The optimal process Parameter for obtaining the minimum dimensional accuracy is the 0.10 mm Layer Height of Print Speed 40 mm/s and the Print Temperature of 195 oC. Maximum hardness value with a Layer Height percentage of (26.015%), Print Speed (60.511%) and Print Temperature amounting to (8.213%). The optimal process Parameter for obtaining the maximum hardness value is the 0.10 mm Layer Height of the Print Speed of 20 mm/s and the Print Temperature of 205 oC.
Co-Authors A.A. Ketut Agung Cahyawan W Abu Hasan Ade, Ade Putra Maulana AIDA SYARIF Alif Burhanuddin Yusuf Habibie Anis Roihatin Apriansyah, Icvan Arissetyadhi, Iwan Arnoldi, Dwi Azharuddin Azharuddin Azharuddin, Azharuddin Bayumi Setiawan Effendi, Sairul Fahri Fahri Firdaus Firdaus Fitrianza Franando, Franando Hadi, Kms. M. Hanif Akbar, Ikhlasul Januartha, Andrian Sagisky Kalsum, Leila kms, m amin khaitami Kurnianingsih Kurnianingsih, Kurnianingsih Martomi, Eka Satria Meidian Pratama, Risco Muhammad Arif Fadilah Muhammad Ikbal Muhammad Insan Kamil, Muhammad Insan Muhammad Yerizam Muhammad, Novriadi Novarika, Wirda Okviyanto, Toni Putri, Fenoria Radjiq, Akhmad Rasid, M. Robert Junaidi RS, Carlos Rusdianasari Rusdianasari Satria Martomi, Eka Shangra, Kevin Dwiva Sundari, Ella Syahputra, Angga Panjy Tresna Dewi Wijaya Pratama, Agung Wilza, Romi Yahya Yahya Yahya Yohandri Bow Yusuf Dewantoro Herlambang Zamheri, Ahmad