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A. Grummy Wailanduw
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jurnalotopro@unesa.ac.id
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Jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Surabaya Gedung A6 Kampus UNESA Ketintang Surabaya 60231 Telp. (031) 8299487, Fax. (031) 8292957
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Otopro
Published by Universitas Negeri Surabaya
ISSN : 1858411X     EISSN : 26857863     DOI : http://dx.doi.org/1026740/otopro
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Otopro diterbitkan 2 (dua) kali setahun yaitu bulan Mei dan November oleh Jurusan Teknik Mesin, FT-UNESA, sebagai media informasi dan forum kajian masalah ilmu Teknik Mesin. Berisi tentang tulisan ilmiah, ringkasan hasil penelitian, pembahasan kepustakaan dan gagasan kritis yang orisinil. Redaksi mengundang para ahli, praktisi, dan siapa saja yang berminat untuk menyumbangkan tulisan yang belum pernah diterbitkan dalam media cetak lain, tema tulisan meliputi: Permesinan, Konversi Energi, Material dan Metalurgi, Manufaktur, Rancang Bangun Mesin
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 165 Documents
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UJI PERFORMANSI ALAT DESTILASI UNTUK PEMURNIAN MINYAK DARI LIMBAH PLASTIK Artian Sirun; Priyono Priyono; Franklin Bawano; Niko Pinangkaan
Otopro Vol 18 No 2 Mei 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v18n2.p44-48

Abstract

In everyday life the use of plastic materials is very dominant. The use of this plastic material from year to year has greatly increased, which has resulted in an increase in plastic waste. Various parties have conducted research to reduce plastic waste into something that can have added value, including converting plastic waste into alternative energy sources in the form of fuel. Handling of plastic waste can be done by recycling it by heating it in a reactor so that it becomes liquid oil, then the oil is purified using a distillation apparatus. This study aims to determine the performance of oil refining distillation equipment from the processing of Low Density Polyethylene (LDPE) plastic waste which can be used as fuel. The research method used is the performance test for refining oil from the processing of plastic waste which is heated with a distillation apparatus. Testing the plastic oil purification distillation apparatus was carried out 5 times, the test was carried out by means of each oil being put into the reactor totaling 3,500ml each time of testing, from the observations it showed that the results of tests 1 to 5 produced refined oil 1 = 1,592ml, 2 = 1.627ml, 3 = 1.609ml, 4 = 1.616ml, 5 = 1.319ml. The total amount of refined oil is: 7,768ml and the average temperature of the reactor is 184.6oC.
PERANCANGAN ECONOMICAL BALANCE DONGKRAK ULIR ELEKTRIK DWI HASTA Muhammad Dimas Ferdiansyah; Sukendro Sasongko
Otopro Vol 18 No 2 Mei 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v18n2.p54-58

Abstract

The Dwi Hasta lifting crew jack is a tool that assist the car maintenance mechanician. It tool support the car at an elevationfor the maintenance working and lay it down after the mechanician done. The objective of study is to obtain the cost of themanufacturing from production stage to selling. In which, it device is for assisting the mechanician repaired a car. Manufacture system would obtain economic values and production time at one unit. The investigation is started from design, and to the manufacturing system. Regards to the planning of the manufacturing, the production cost, the selling cost, and time of refund are obtained at the cost calculation. The money refund is the production cost will get after selling. The experiment method is conducted at operating process chart (OPC), manufacturing lead time (MLT), production time, production flow, production capacity and break event point (Q). The experiment results showed economic value from raw material to one-unit machine. MLT is of about 53,83 hours. Production time performs is for 346,7 min. Production capacity is 6 units per month. Break Event Point (Q) will be started after 3 months. The profit taking back is Rp 6.181. 964. Money will be payback after 3 month
KAJIAN EKSPERIMEN PENGARUH DIAMETER PLUNGER POMPA INJEKSI BAHAN BAKAR PADA PERFORMA DAN GAS BUANG MESIN DAIHATSU TAFT DIESEL DL62 Joni Dewanto; Teng Sutrisno; Nicolas G. W. Wardana
Otopro Vol 18 No 2 Mei 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v18n2.p49-53

Abstract

For classic car lovers, the appearance of the Daihatsu Taft in the nineties was no less interesting than today's SUVs. However, the power is not comparable, because the Daihatsu Taft diesel engine still uses old technology. This research is an attempt to improve the performance of old diesel engines, which do not use common rail systems. Specifically, to determine the effect of modifying the size of the plunger of the fuel injection pump, on engine power and torque, fuel consumption and exhaust gas opacity. The analysis was carried out through a comparative study of the performance of standard machines and machines with modified plunger sizes I and II which were larger than the standard plunger diameter. Testing the performance of the machine using a Dastek Dynamometer 2WD Plate Roller. The results showed that the larger the plunger diameter of the injection pump, the effect of increasing power, torque, fuel consumption rate and exhaust gas opacity as well as the efficiency of the Daihatsu Taft DL62 diesel engine. The increase in exhaust gas opacities of modified engines does not exceed and is still far below the maximum threshold according to the Regulation of the State Ministry of Environment No. 5 of 2006 concerning Thresholds of Exhaust Emissions of Old Motor Vehicles. The emission test method uses ISO 11614
PENGARUH JUMLAH BILAH PENGARAH ANGIN JENIS OMNIDIRECTIONAL TERHADAP KINERJA MODEL TURBIN ANGIN SAVONIUS Indra Herlamba Siregar; Moch Effendy; Akhmad Hafidz Ainur Rasyid
Otopro Vol 18 No 2 Mei 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v18n2.p65-70

Abstract

Recently, many countries are looking for alternative energy sources that are renewable and environmentally friendly, one of which is wind energy, with Indonesia's wind energy potential of 9 GW and relatively low wind speeds and geographical position, it is necessary to develop wind turbine technology that is suitable for wind characters in Indonesia. In this research, an omnidirectional wind director model (ODGV) is developed around the savonius wind turbine which aims to improve the performance of the savonius wind turbine model. The ODGV consists of several blades that function to direct the wind at 45o  counterclockwise, with the aim of accelerating the flow so as to increase the positive torque of the concave side blades and reduce the negative torque of the convex side blades of the savonius wind turbine model. An open-type wind tunnel was used to test the savonius wind turbine model with ODGVs. Five ODGVs were developed in this study, using 4, 6, 8, 12, and 16 directional blades with a width of 5cm. The data were analyzed using descriptive analysis. The results show that the ODGV can substantially improve the rotor performance, depending on the number of directional blades. The ODGV with 12 directional blades produced the greatest effect on the performance of the savonius wind turbine model at Re = 93269 which could increase the Cp 69.15% more than the savonius wind turbine model without ODGV. As the Reynolds number increases, the ODGV tends to significantly improve the performance of the savonius wind turbine model.
LEVELLING MESIN BUBUT LZ 330 G MENGGUNAKAN ALAT UKUR SPIRIT LEVEL Roberth Marshall Ratlalan; Nurisma Maharani
Otopro Vol 18 No 2 Mei 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v18n2.p71-76

Abstract

The leveling process is the initial stage before operating a lathe. The test will be carried out if the flatness on the machine and the results have deviated greatly, it must be leveled on the lathe. This study aims at a high level of accuracy of machine tools in the form of leveling on three types of Gedee Weiler LZ 330 G lathes located at the AK-Manufaktur Bantaeng Manufacturing Workshop. This type of research is categorized as quantitative research which is an inductive, objective and scientific method in which the data is processed in the form of numbers or statements which are then analyzed. Data from the test results of the M1 lathe with the longitudinal tilt direction towards the off head, while in the transverse position the slope direction is towards the rear slide. Flatness deviation reaches 1.06 mm in the longitudinal position and 0.15 mm in the transverse position. For the M2 lathe, the direction of the longitudinal slope is the direction of the off head, while in the transverse position, the direction of the slope of the fore runway. Deviation of flatness reaches 1.3 mm in the longitudinal position and 1.75 in the transverse position and the M3 lathe with the longitudinal slope direction towards the off head, while in the transverse position the slope direction is towards the front of the runway. Flatness deviation reaches 1.65 mm in the longitudinal position and 10.15 mm in the transverse position.
ANALISIS TEGANGAN STATIK DAN DEFORMASI FRAME ELECTRIC GANESHA SCOOTER PORTABLE (E-GASPOL) MENGGUNAKAN SOFTWARE SOLIDWORKS I Gede Wiratmaja; Nyoman Arya Wigraha; Komang Purnayasa
Otopro Vol 19 No 1 Nov 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v19n1.p8-17

Abstract

This study aims to determine and reduce static stress and increase the safety factor on the E-GASPOL vehicle frame. The type of development research used is the R2D2 type (Reflective, Recursive, Design and Development) which has three phases, namely defining, design and development and dissemination. The data analysis technique used is the finite element method, this method can solve static, dynamic, linear and non-linear problems. In this study, the static stress analysis of vehicle frame was carried out in conditions without rider load (the mass of the frame itself is 13.34 kg) and conditions with rider load (frame mass of 13.34 kg + average rider mass of 70 kg, so the total is 83.34 kg). The static stress analysis results on the four designs, the results of the modified vehicle frame design 3 have the best value, namely obtaining a maximum stress value of 1,255xN/m conditions without rider load, this result gets a decrease of 58.55% from the standard design and with a rider load of 7,699xN/m, this result gets a decrease of 58.56% from the standard design, the smaller the stress value obtained on a frame. The maximum displacement/deformation value of 1,453xmm conditions without rider load, this result gets a decrease of 77.718% from the standard design and with a rider load of 8,791xmm, this result gets a decrease of 78.10% from the standard design. From the data it can be concluded that the modified frame is better and stronger than the standard frame.
PERBAIKAN PERFORMA MESIN AUTOMATIC VEHICLE DENGAN FUEL-BOOSTER RACING Sukendro Sasongko; Titik Arlisa; Hery Irawan
Otopro Vol 19 No 1 Nov 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v19n1.p18-23

Abstract

The performance enhancing engine of automatic vehicle experimentally investigated by adding a fuel-booster. The study aims to improve the combustion matic engine Honda by adding the fuel addictive reactant. The existence of fuel-addictive reactants enhances engine combustion. Besides that, the high octane number of fuel could be optimized during chemical reactions. Thus, the study investigates the matic motorcycle engine at steady operation. The experiment methods vary the fuel additive concentration. The fuel addictive varied is Eco racing to percentile. Thus, the engine performed by varying sparks (racing spark and standard spark). The engine of matic motorcycle is investigated. The engine performance is studied at the stand dyno test. The specific fuel consumption is scaled by a litre of Pertalite. The gas emissions were probed by a gas analyser. The investigation is conducted by three time replication. The result shows the fuel-addictive reactant (Eco racing) performs the best contributions during an iridium spark installed at the engine. Thus, the engine power was detected at 7,5 Hp. Torque resulted by 26,68 Nm; specific fuel consumption was at 0,048 gram,/Hp.s.  Engine-Rpm of 6000 emits CO 0,27%, HC 147 ppm, CO2 12,0 %, dan O2 20,84 %. Those gas concentrations are still lower and acceptable due to their concentration being lower than that in the national emissions standard.  
ANALISIS SUDUT SERANG TERHADAP KARAKTERISTIK AERODINAMIKA PADA BILAH 4412 RPM RENDAH DENGAN METODE CFD 6DOF Danang Febriyanto; Hangga Wicaksono; Bayu Pranoto; Mochamad Muzaki
Otopro Vol 19 No 1 Nov 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v19n1.p24-33

Abstract

At this time the power plant still uses a lot of coal fuel, so it is necessary to look for alternative energy, one of which is wind energy. Wind turbines are devices that can convert kinetic energy in the wind into mechanical energy which is then converted into electrical energy through a generator. The analysis method in this research uses Computational Fluid Dynamics (CFD), Qblade, and experimental validation testing using a wind tunnel. The simulated airfoil types consist of 3 types, namely, NACA 4412, NACA 4415, and FX-60 100 (126). The simulation results show that, the most optimal airfoil is NACA 4412 with an angle of attack of 25° and a wind speed of 8 m/s can produce a torque of 3.55503 Nm, a pressure of 45 Pa, a tangential velocity of 55.495 m/s, and a rotational speed of 529. 94 rpm, while the smallest simulation results are on the FX-60 100 (126) airfoil with an angle of attack of 15° and the same wind speed of 8m/s can produce a torque of 1.60390 Nm, a pressure of 40 Pa, a tangential velocity of 9.06592 m/s, and a rotational speed of 108.2164 rpm. The results of experimental testing of wind turbines where the wind turbine used uses the geometry of NACA 4412 show that an angle of attack of 25 ° and a wind speed of 8m / s produces a large electrical power and rpm with a value of 7.98 Watt and 482.2 rpm respectively
PENGARUH JUMLAH DAN ARAH SAYATAN TERHADAP HASIL MILLING ALUMINIUM Nurlia Sari; Akhmad Faizin; Muhammad Fakhruddin; Agus Dani
Otopro Vol 19 No 1 Nov 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v19n1.p40-44

Abstract

The quality of production goods, especially milling on aluminum material, is considered good if it is characterized by good surface quality of the components and efficient (short) machining time. There are various factors that affect this. This study investigated the CNC milling machining parameters, namely depth of cut and step over, which were written as the influence of the number and direction of cuts on the surface quality and machining time of aluminum materials. The purpose was to obtain the appropriate parameters so that the machining process is more efficient and with the appropriate quality. The CNC milling used was CNC Dahlih with a 6mm diameter tool, feed rate of 460 mm/min, and rotational speed of 2800 RPM. The variables were vertical cutting direction (depth of cut 5mm) with variations in step over of 0.5 mm, 1 mm, and 2 mm, and horizontal cutting direction (step over 5mm) with variations in depth of cut of 0.5mm, 1mm, and 2mm. So that the number of cuts can be equalized to 4, 6, and 12 in the vertical and horizontal cutting directions. The results showed that the more cuts, the lower the surface roughness, but it increased the machining time. 
PENGARUH VARIASI TRAVEL SPEED TERHADAP KEKUATAN TARIK PADA PENGELASAN DISIMILAR METAL DENGAN MIG ROBOTIC WELDING Kris Witono; Talifatim Machfuroh; Sarjiyana Sarjiyana; Elka Faizal
Otopro Vol 19 No 1 Nov 2023
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v19n1.p34-39

Abstract

Welding using dissimilar metals is a new phenomenon in the industrial world. Some studies have already addressed dissimilar metal welding, but they are limited to variations in welding current strength and voltage. None have yet explored welding travel speed, mainly due to the difficulty in controlling it in manual welding. Because of this background, the researcher conducted a study on welding by varying the travel speed. The aim of this research is to elucidate the influence of travel speed on tensile strength in dissimilar metal welding using MIG robotic welding. The study involved joining dissimilar metals, namely low carbon steel and stainless steel (SS 304), using the MIG Robotic Welding process with travel speed variations of 50 cm/second, 60 cm/second, and 70 cm/second. The welding results were then subjected to tensile testing and macrostructure observation of the fracture surfaces. The research findings indicate that the highest tensile strength was achieved at a travel speed of 50 cm/minute, with a maximum tensile strength of 839.8879 MPa.

Page 14 of 17 | Total Record : 165

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