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All Journal Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Jurnal Ilmiah Teknik Mesin Poros IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA)
Abrar Riza, Abrar
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Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Energy Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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PENGARUH PARAMETER PEMESINAN TERHADAP KEKASARAN PERMUKAAN MATERIAL ALUMINIUM 6061 DAN 7075 PADA PROSES SEKRAP Lubis, M. Sobron Yamin; Riza, Abrar; Agung, Dani Putra
Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Vol 4, No 1 (2020): Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmstkik.v4i1.3414

Abstract

Aluminum Alloy metal is widely used in making lightweight construction on machinery. To produce a flat metal alluminium alloy surface, a shearing machine is needed. There are two types of aluminum materials that are commonly used, namely Aluminum 6061 and 7075. In the process of forming metals using a scrap machine, it is important to determine the machining parameters because this is closely related to the surface conditions of the workpiece produced. Difficulties in determining the appropriate combination of machining parameters often result in work surface conditions that are not as expected or have a high roughness. With the right parameters, the quality of surface roughness can be predicted as planned before the machining process. The cutting parameters are cutting speed and cutting depth. In this study the cutting speed used varied, namely 4.68 m / min, 7.30 m / min, 11.70 m / min, 18.29 m / min with a cutting depth of 0.50 mm, 1.00 mm and 1 , 50 mm, to cut aluminum 6061 and 7075 using the HSS chisel. In the initial step, do the machine tool settings, place the chisel on the chisel holder, place the workpiece in vise, adjust the cutting speed, depth of feed, and perform machining. After machining, a surface roughness measurement is carried out using a surface test. From the results of the study it was found that the value of surface roughness is directly proportional to the depth of cut. The value of surface roughness is inversely proportional to cutting speed and hardness of the material. Determination of cutting speed through empirical equations based on surface roughness: aluminum alloy 6061 is: Ra = 23,366e-0,146Vc (µm) and aluminum alloy 7075 are: Ra = 13,482e-0.109Vc (µm). ABSTRAK Bahan logam aluminium Alloy banyak digunakan dalam pembuatan konstruksi ringan pada mesin-mesin. Untuk menghasilkan permukaan logam alluminium alloy yang rata, maka diperlukan mesin sekrap. Terdapat dua jenis material aluminium yang umum digunakan yaitu Aluminium 6061 dan 7075. Pada proses pembentukan logam dengan menggunakan mesin sekrap, adalah penting untuk menentukan parameter pemesinan  Karena hal ini berkaitan erat dengan kondisi permukaan benda kerja yang dihasilkan. Kesulitan dalam menentukan kombinasi parameter pemesinan yang sesuai seringkali mengakibatkan kondisi permukaan benda kerja kerja yang tidak sesuai diharapkan atau memiliki kekasaran yang tinggi. Dengan parameter yang tepat, kualitas kekasaran permukaan dapat diprediksi seperti yang direncanakan sebelum proses pemesinan. Parameter pemotongan tersebut adalah kecepatan pemotongan dan kedalaman potong. Pada penelitian ini kecepatan pemotongan yang digunakan bervariasi yaitu 4,68 m/min,7,30 m/min, 11,70 m/min,18,29 m/min dengan kedalaman pemotongan 0,50 mm,1,00 mm dan 1,50 mm, untuk memotong aluminum  6061 dan 7075 dengan menggunakan mata pahat HSS.. Pada langkah awali dilakukan setting mesin perkakas, meletakkan mata pahat pada pemegang mata pahat, meletakkan benda kerja pada ragum, melakukan settingg untuk kecepatan pemotongan, kedalaman pemakanan, dan melakukan pemesinan. Setiap kali selesai pemesinan, dilakukan pengukuran kekasaran permukaan dengan menggunakan alat ukur surface test. Dari hasil penelitian diperoleh bahwa nilai kekasaran permukaan berbanding lurus dengan kedalaman potong. Nilai kekasaran permukaan berbanding terbalik dengan kecepatan potong dan kekerasan material. Penentuan kecepatan potong melalui  persamaan empiris  berdasarkan kekasaran permukaan:  aluminium alloy 6061 adalah:  Ra = 23.366e-0.146Vc(µm) dan aluminium alloy 7075 adalah:  Ra = 13.482e-0.109Vc(µm).
UNJUK KERJA TURBIN CROSS-FLOW DENGAN SIMULASI CFD PADA NOSEL DAN MANUFAKTUR PADA RUNNER Darmawan, Steven; Riza, Abrar; Lubis, M. Sobron Y.; Winardi, Stevanus Aditya; Christianto, Reuben
Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Vol 5, No 2 (2021): Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmstkik.v5i2.11904

Abstract

Covid-19 pandemic has lead disruption in energy sector, new-and-renewable energy demand is increasing, which show that renewable energy is promisable to be developed.  As one of the hydraulic turbine, the cross-flow turbine is prospective primve mover in line with the 7th goal of the SDG’s Goals. Cross-flow turbine is radial atmospheric turbine which generates power by converting hydraulic energy from water to mechanical energy on the shaft by using nozzle and runner. The advantages make this device is became famous, including simple construction and geometry, low maintenance & cost and can be used at wide range operation scheme. However, the cross-flow turbine system is also known to have low efficiency. Based on this condition, this research is aims to improve the efficiency with design the nozzle and to manufacture the runner with two material. The operating condition is set to 1 phase water as working fluid with 1,4 L/s of flow. Nozzle design conducted with CFD 3D simulation from 3 different model. Runner manufacturing is conducted numerically with CAM simulation and experimentally by using CNC machining with Stainless Stell 304 and Aluminium 6061. CFD simulation on the nozzle shows that nozzle model 3 with total length of 400 mm, width 124 mm and throat radius 75 mm.resulting the maximum outlet velocity to the runner 0,135 m/s. Manufacturing of the runner and experiment on the system with nozzle model 3 show that the runner with SS 304 is able to generates larger power to 8,38 Watt,100% larger than the Aluminium 6061.Keywords: Renewable Energy, Cross-flow turbine, CFD, CAMAbstrakPandemi Covid-19 mengakibatkan disrupsi pada sektor energi, dimana konsumsi energi baru dan terbarukan mengalami kenaikan. Fenomena ini menunjukkan bahwa energi terbarukan menjanjikan untuk terus dikembangkan. Sesuai dengan goal ke-7 dari SDG’s oleh PBB, turbin cross-flow merupakan turbin radial yang menghasilkan daya melalui konversi energi hidrolik dari air sebagai sumber energi terbarukan, menjadi energi mekanis pada poros melalui penggunaan nosel dan runner, banyak digunakan karena beberapa kelebihannya, antara lain konstruksi yang sederhana dan simetris hanya memerlukan biaya perawatan yang rendah dan sederhana serta dapat digunakan pada rentang beban yang cukup besar. Namun demikian, turbin cross-flow secara umum memiliki nilai efisiensi yang lebih rendah. Efisiensi sistem dapat ditingkatkan dengan penggunaan material runner yang seusai. Penelitian ini bertujuan untuk melakukan perancangan terhadap nosel dan proses manufaktur runner cross-flow sehingga dapat diperoleh geometri nosel serta jenis material dan proses manufaktur runner yang sesuai untuk rentang operasi, yaitu aliran air 1 fasa dengan debit 1,4 L/s. Pengembangan nosel dilakukan dengan menggunakan metode CFD pada 3 model geometri. Pengembangan terhadap runner meliputi simulasi CAM dan manufaktur pada 2 jenis material, yaitu SS 304 dan Aluminium 6061. Hasil simulasi CFD 3D menunjukkan bahwa nosel model 3 dengan dimensi panjang total 400mm, lebar 124 mm, dan radius pada throat 75mm menghasilkan kecepatan pada sisi outlet sebesar 0,135 m/s. Hasil simulasi CAM dan Manufaktur terhadap runner serta eksperimen terhadap sistem dengan nosel model 3 menunjukkan bahwa bahwa runner dengan material SS 304 menghasilkan daya, yaitu 8.38 Watt, 100% lebih besar dibandingkan dengan runner dengan material Aluminium 6061.
Karakteristik Sifat Mekanik dan Struktur Mikro Baja SS 400 Pada Elevasi Temperatur Menggunakan Coating MR Sophia, Yohanes; Siahaan, Erwin; Riza, Abrar
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.598 KB) | DOI: 10.36418/syntax-literate.v7i12.10761

Abstract

Baja SS 400 adalah salah satu jenis baja yang paling umum digunakan untuk struktur baja. Pengujian yang dilakukan meliputi pengujian kekuatan tarik, pengujian kekerasan brinel, dan penembakan struktur mikro. Pada percobaan yang akan dilakukan, untuk mendapatkan parameter dan hasil yang optimal, terdapat beberapa pengujian yang akan dilakukan yaitu pemanasan, uji tarik, uji kekerasan dan pengamatan struktur mikro. Untuk pemanasan spesimen dimasukkan ke dalam tanur untuk dipanaskan selama 30 menit. Pengujian tarik menggunakan standar ASTM E8, penelitian ini menghasilkan baja lapis dengan ketebalan 0,3 mm lebih kuat dalam ketahanan terhadap panas. Pada pengujian tarik ini baja uncoated memiliki kekuatan tarik sebesar 5,41 Mpa dan regangan sebesar 0,41%, untuk baja yang telah dilapisi dan mengalami perlakuan panas pada suhu 50°C memiliki kekuatan tarik sebesar 5,31 Mpa dan regangan sebesar 0,025%, pada benda uji ketiga juga dilakukan pelapisan dan juga diberi perlakuan panas pada temperatur 100°C memiliki kuat tarik 5,51 Mpa dan regangan 0,41%. Dan spesimen dengan perlakuan panas pada suhu 150% memiliki kekuatan tarik 4,52 Mpa dan regangan 0,46%.
Analisis Pertumbuhan Keausan Pahat Pada Pembubutan Material Mild Steel Lubis, Muhammad Sobron Yamin; Riza, Abrar; Michel, John; Ariyanti, Silvi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.72

Abstract

The study of wear on tool blades when cutting metal is important because it influences work results and production costs. Increasing metal hardness demands durability and strength of the chisel bit. Long periods of use and high speeds can cause wear, damage the chisel, and affect the quality of the results and production costs. This research uses a CNC lathe with a carbide cutting edge to cut mild steel. The cutting speed varies between 170 to 190 m/min with a cutting pass of 0.3 mm/revolution, a cutting depth of 0.7 mm, and a wear criterion of 0.3 mm. Turning was carried out for 2.5 minutes, then wear was observed using an optical electron microscope. The results show abrasive wear on the side of the chisel blade (flank wear) due to friction. A cutting speed of 190 m/min took 7:25 minutes, 180 m/min took 8:09 minutes, and 170 m/min took 8:36 minutes. This research proves that cutting speed influences wear rates, with wear primarily caused by abrasive friction.
ANALISA CACAT PENYUSUTAN MATERIAL FCD450 DAN ALUMINIUM A356 PADA PROSES PENGECORAN STANG PISTON DINDING TIPIS MENGGUNAKAN SIMULASI Cahaya, Nicolas Hary; Yamin Lubis, Sobron; Riza, Abrar
POROS Vol. 19 No. 1 (2023): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/poros.v19i1.25482

Abstract

Metal castings are generally used to manufacture machine parts with complex shapes, including the manufacture of thin wall components. Thin wall casting (TWC) is a casting method for producing lightweight component objects by thinning the component walls such as plates or parts of the cast object that can be thinned. Thin wall ductile iron (TWDI) is nodular cast iron, casted through TWC. TWDI makes nodular cast iron possible to compete with aluminum when compared to the weight between these two materials. The application of aluminium to TWC aluminum will lead to lighter components production. The main reason aluminum is replacing cast iron in the automotive field is the inability or lack of interest on the part of cast iron manufacturers to produce lightweight iron components, which is TWDI. The use of simulation in the casting process helps to show the whole process in casting. This research was conducted to determine the effect of using the TWC design made for nodular cast iron on aluminum and the defects formed by using this design through software simulation. The casting design used uses Sulamet-Ariobimo et al. casting design [10] which has succeeded in producing connecting rod components using TWDI on an industrial scale. The simulation software used is the Altair Inspire Cast simulation (serial number: 680344) owned by PT. Wisma Teknik Lestari. Simulations were carried out for both FCD450 and A356 materials. Based on the results of the shrinkage simulation, there are shrinkage defects in the TWDI material and there are no shrinkage defects in Aluminum A356. This is due to the solidification characteristics and cooling rate of the two materials, where the cooling rate for TWDI is 3.84E+4 J, and 8.85E+4  J for Aluminum A356. In addition, based on the solid fraction simulation results, there are hotspots on cast components for TWDI materials which result in shrinkage defects in the components
Analisis Perilaku Termal dan Kapasitas Panas Mata Pahat Uncoated dan Coated Carbide pada Proses Pemotongan Besi Tuang Lubis, M. Sobron Yamin; Riza, Abrar; Han, Han; Hidayat, Nathan Ferdiantino
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 1 (2025): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i1.181

Abstract

During turning, most energy is converted into heat, which spreads to the cutting tool, chips, and workpiece. Heat transfer occurs via conduction and can cause tool wear. To reduce this, coatings with low thermal conductivity are used. This study aims to analyze heat absorption and heat capacity of uncoated carbide and TiCN + Al₂O₃ + TiN coated carbide tools during cast iron turning. Tests were conducted at 160, 210, and 260 m/min cutting speeds. Temperatures were measured using a K-type thermocouple placed at the tooltip. Results show the coating effectively reduces heat penetration into the tool. The coated carbide required 64.5 J/K for a 1 K temperature rise, while the uncoated only needed 1.5 J/K. This indicates uncoated tools heat up faster and wear more quickly.
Analisis Pembakaran Ganda Bahan Bakar Natural Gas dan Biosolar pada Mesin Diesel Satu Silinder: Studi Efisiensi Termal dan Performa Narantoko, Resi Aji; Riza, Abrar; Tanujaya, Harto
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 2 (2025): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i2.219

Abstract

This research discussion aims to determine the performance of the Jiandong 170F single-cylinder Diesel engine when operating on dual-fuel combustion, utilizing biodiesel as the primary fuel and natural gas. In this study, RCCI and low-temperature combustion (LTC) are methods of fuel mixing by using a mixture of B30 biodiesel fuel and natural gas. The characteristic of natural gas with a low cetane number causes the combustion process to occur at lower temperatures, resulting in early ignition of the upper dead point. This condition can be examined using the HCCI method. The test results showed a 4% increase in actual torque, worth 5.8 Nm, compared to the use of pure biodiesel. In addition, there is an increase in thermal efficiency of 5-10%, which is worth an average of 30%. This makes combustion more perfect, so that it contributes to a reduction in residual emissions or NOx.
Co-Authors Agung, Dani Putra Cahaya, Nicolas Hary Christianto, Reuben Dwiwahdju Sasongko, Dwiwahdju Han, Han Harto Tanujaya Herri Susanto Hidayat, Nathan Ferdiantino Lubis, Muhammad Sobron Yamin Michel, John Narantoko, Resi Aji Siahaan, Erwin Silvi Ariyanti Sobron Lubis Sophia, Yohanes Steven Darmawan, Steven Winardi, Stevanus Aditya Yamin Lubis, Sobron Yazid Bindar