Rekayasa Mesin
Rekayasa Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Brawijaya, Malang-East Java-Indonesia. Rekayasa Mesin is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Rekayasa Mesin accepts submission from all over the world, especially from Indonesia.
Rekayasa Mesin aims to provide a forum for national and international academicians, researchers and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage.
The scope of Rekayasa Mesin are the specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy.
All articles submitted to this journal can be written in Bahasa and English Language.
Articles
965 Documents
<![CDATA[Precision Mold of Prototype Titanium Orthopedic Implant using Metal Injection Molding Approach ]]>
<![CDATA[Wiranegara, Haruman]]>;
<![CDATA[Fauzi, Muhammad Nauval]]>;
<![CDATA[Virdhian, Shinta]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 11, No 3 (2020) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2020.011.03.21
<![CDATA[MIDC’s researchers in fulfilling Industry Development Programme have taken a step to develop technology in the design application of orthopedic implants to help suppress the rate of imported medical devices in Indonesia. This research objective was to make a prototype plate for a jawbone connector that meets the geometric specifications with the metal injection molding approach. The jawbone connector plate has a very small size of about 2 mm x 20 mm x 0.5 mm that needs precision mold with certain geometric specifications. MIM approach was used, from the literature reviews that show MIM is the appropriate process for manufacturing implants. The phases of MIM were done according to the standard reference which is making raw materials or feedstock, gatting system design, flow simulation, precision mold producing, mold testing, injection process, debinding, sintering, and mechanical product testing. The results of this study were precision molds with several variants and were test using plastic polypropylene to see the performance of the mold. The researchers then produce the jawbone connector implant using feedstock material. The test result conducted in MIDC successfully shows that the mold can produce shapes that match the required geometry.]]>
<![CDATA[Value Creation in Fisheries Supply Chain as A Role Model for Fish Protein Hydrolyzate Cluster Development ]]>
<![CDATA[Santoso, Sugeng]]>;
<![CDATA[Soehari, Tjiptogoro Dinarjo]]>;
<![CDATA[Aprianto, Yoce]]>;
<![CDATA[Andrean, Dicky]]>;
<![CDATA[Henny, Henny]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 11, No 3 (2020) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2020.011.03.12
<![CDATA[To increase the level of competitiveness in the maritime and fisheries industry in Indonesia, the creation of added value products, such as Fish Protein Hydrolyzate (FHP) would be essential to accelerate this mission. This value creation occurs along the fisheries supply chain, including fishermen, shippers, fish processing units, and industry. To assess the innovation maturity, the FHP machine was assessed with the Technology Readiness Level (TRL) and Innovation Readiness Level (IRL). The TLR was carried out by TRL-Meter and IRL was carried out by IRL-Meter. The data was collected by interviews and questionnaires with related stakeholders. The data assessed that the machine met the requirement for TRL level 9 and IRL Level 3. The recommendation for TRL 9 and IRL 3 has been conducted through a strategic partnership with a related state-owned enterprise. Because the FHP shows product competitiveness, gives value-added, and generates value creation in the fisheries supply chain, it could be a role model for the development of the FHP cluster in another location. However, the involvement of local and central governments still needs to be improved significantly. Furthermore, the government should build a conducive ecosystem for technology-based innovation in the country.]]>
<![CDATA[Karakterisasi Biogas Hasil Pemurnian dengan Down-Up Purifier Termodifikasi ]]>
<![CDATA[Ritonga, Abdul Mukhlis]]>;
<![CDATA[Masrukhi, Masrukhi]]>;
<![CDATA[Safi’i, Azis Imam]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 1 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.01.19
<![CDATA[Biogas is a combustible gas produced from the fermentation process of organic materials by anaerobic bacteria. Biogas can be made by using a digester. A digester is a place where the process of decomposing organic matter by bacteria. The result of biogas still contains impurity gases, so that the quality of biogas is not good. Therefore, efforts to filter the gas are necessary. The purifier is a device to filter a gas. The use of purifiers in a series of digester installations aims to filter out unnecessary gases. The purpose of this research is to design a down-up purifier type biogas purification plant, to determine the changes in substrate characteristics during fermentation and conduct a gas quality test after purification. The results showed that the biogas installation type down-up purifier was designed and assembled using 150 liter drums for gas digesters and reservoirs, 1/2 inch hoses for connecting, 2 purifiers for purification and activated charcoal adsorbents. The C/N ratio is 36.37, an average substrate temperature of 28.62oC and an average pH of 5.9. Initial and final Biological Oxygen Demand (BOD) values are 960.12 mg/l and 9.312.53 mg/l. The initial and final Chemical Oxygen Demand (COD) values are 313,500.00 mg/l and 29,100.00 mg/l. Then Total Solid (TS) decreased by 1.45% and Volatile Solid (VS) increased by 0.21%. The use of activated charcoal adsorbents in the two purifiers can reduce CO2 gas content by 83.79% in biogas with the most optimal purification time of 60 minutes.]]>
<![CDATA[Pengaruh Kedalaman Sudu Mangkok terhadap Unjuk Kerja Turbin Kinetik ]]>
<![CDATA[Fitriansyah, Erwin]]>;
<![CDATA[Wahyudi, Slamet]]>;
<![CDATA[Winarto, Winarto]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 11, No 3 (2020) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2020.011.03.3
<![CDATA[The purpose of this study was to determine the effect of depth variations of the bowl blade on the performance of kinetic turbines. The test has conducted experimentally on a laboratory scale. In this study three vertical shaft, kinetic turbines were used with blade depth variations of 2 cm, 3 cm, and 4 cm. Each turbine will be tested on different rotation variations and flowrate variations. Parameters such as turbine power and efficiency will be determined based on the results of measurements of water velocity, water level, and braking load. The results showed that the depth of the bowl blade affected the performance of the kinetic turbine. The highest kinetic turbine performance was obtained in the turbine with 4 cm blade depth variation, followed by the turbine with 3 cm blade depth variation and the lowest turbine performance was obtained at 2 cm blade depth variation. The maximum performance of the turbine is obtained at 4 cm blade depth variation at 80 rpm and 65 m3/h water discharge, where the power generated is 13.2 Watts and efficiency is 34.5%.]]>
<![CDATA[Peningkatan Kedalaman Penetrasi Las Stainless Steel 304 dengan Medan Magnet Eksternal pada Pengelasan Autogenous Tungsten Inert Gas Welding ]]>
<![CDATA[Haikal, Haikal]]>;
<![CDATA[Chamim, Moch.]]>;
<![CDATA[Andriyansyah, Deni]]>;
<![CDATA[Wiyono, Apri]]>;
<![CDATA[Baskoro, Ario Sunar]]>;
<![CDATA[Isnarno, Isnarno]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 1 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.01.10
<![CDATA[In this study, research on the use of the External Magnetic Field method – Tungsten Inert Gas was done to determine the effect of welding arc compression on the quality of AISI 304 thin plate weld. The welding process was performed using autogenous welds. In this study, an external magnetic field was generated by placing a magnetic solenoid around the TIG welding torch. Enabling this electromagnetic field is done dynamically using a microcontroller. Welding parameters used are welding current 100; 105; 110 A and welding speed 1.6; 1.8; 2.05 mm/s. The results of this study showed that EMF-TIG welding can produce a more uniform bead width along the weld line with a standard deviation of 0.08 compared with conventional TIG welding of 0.12. Increased welding speed of  2.05 mm/s causes no effect on the addition of an external magnetic field to the width of the weld bead. The current parameters are 105 A with a speed of 1.6; 1.8; 2.05 mm/s resulted in compression of the top bead width by 0.87; 0.61; 0.1 mm. The welding parameters with a current of 105 A and welding speed of 1.6 mm/s have a larger upper bead compression effect of 0.84 mm compared to 110 A currents of 0.38 mm. Moreover, the D/W ratio obtained under an external magnetic field was higher than without magnetic.]]>
<![CDATA[Rancang Bangun CNC Plasma Cutting ]]>
<![CDATA[Irfan, Saiful]]>;
<![CDATA[Rusiyanto, Rusiyanto]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 1 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.01.1
<![CDATA[This study aims to determine the frame safety factor and the precision level of CNC plasma cutting results. The research method used is a research and development model, namely the French model. This model has 8 steps that are used to produce a CNC plasma cut design. The data analysis technique used is descriptive statistical analysis techniques derived from the results of tests conducted. Safety factor testing was conducted using the 2015 Autodesk Inventor software with a frame of 110.54 N. The precision cutting results were carried out three times using the same instrument, 20 currents with a speed of 400 mm/min, against ST 37 material with a thickness of 1.3 mm. The results showed that the frame was categorized as safe because the minimum safety factor value was 4.23 ul and the cut test results showed an average measurement with a maximum deviation of 0.3 mm, so it could be concluded that plasma CNC cutting had tolerance. rate of ± 0.3 mm.]]>
<![CDATA[Kekuatan Mekanis Antibacterial Resin Campuran Titanium Dioksida ]]>
<![CDATA[Budiprasojo, Azamataufiq]]>;
<![CDATA[Erawantini, Feby]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 1 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.01.24
<![CDATA[The aim of this research is to analyze the effect of Titanium Dioxide (TiO2) nanoparticles as resin concentrate on mechanical strength. The tested mechanical strength is Bending strength, Impact Strength, and Microhardenest Strength. The types of resin used in this study were acrylic resin without conventional modification and acrylic resin with an additional 0.01 gr and 0.06 gr of TiO2. Specimen dimensions are made revered to ISO 20795-1 (2008) standard specifications. Mechanical strength was determined by using the universal testing machine, Izod pendulum impact testing machine, and also Vickers microhardness tester. From the analysis, the researcher found that the bending strength of resin acrylic was greatly decreased by increasing the TiO2 concentration. It happens in both TiO2 0.01gr and 0.06gr of acrylic resin compared to the non TiO2 resin. The impact strength of 0.01gr TiO2 acrylic resin was significantly increased compared to non TiO2 acrylic resin. But on the other hand for 0.06gr acrylic resin, impact strength was decreased and recorded the lowest impact strength. The highest Micro hardness strength was found in 0.06gr TiO2, It is significantly increased compared to 0.01gr TiO2 and 0gr TiO2. The general conclusion is, adding 0.01gr TiO2 nanoparticles as concentrated into acrylic resin can significantly increase the bending strength, bending strength, and microhardness strength. Meanwhile, adding 0.06gr Tio2 nanoparticles as concentrated into acrylic resin can only increase the bending strength and the microhardness strength, but not for its impact strength.]]>
<![CDATA[Deteksi Cacat Roda Gigi pada Sistem Transmisi Fan Industri Menggunakan Support Vector Machine ]]>
<![CDATA[Kamiel, Berli Paripurna]]>;
<![CDATA[Wicaksono, Kurniawan Budi]]>;
<![CDATA[Riyanta, Bambang]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 11, No 3 (2020) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2020.011.03.17
<![CDATA[A fan is a mechanical device that produces airflow in a particular area. To achieve sufficient torque and speed, an industrial fan often uses a gear transmission. During its operation, the gears may experience damage. The vibration spectrum is a common method to detect a faulty gear. However, the spectrum often produces a graph that is hard to understand. Moreover, the spectrum sometimes fails to show a clear and high amplitude for small gear faults. The study aims to detect faulty gear based on a classification approach using the Support Vector Machine (SVM) algorithm. It is one of the most robust and accurate algorithms among the other classification algorithms especially for cases with a large number of features. The SVM needs statistical parameters as predictors but the decision to choose the parameters seems arbitrary. This research proposes a simple method to select the parameters using a combination of visual inspection and relief feature algorithm. Twelve statistical parameters are introduced and evaluated for potential input for SVM. The statistical parameters are extracted from the time domain of the vibration signal. The experiment is carried out on an industrial fan test rig and introduces 3 carbon steel spur gear conditions i.e. normal, fault 1, fault 2, and records vibration signal using an accelerometer located near the gear transmission system. Â The SVM classifier is built using the RBF kernel function and the classification is carried out by one vs one and one vs all methods. The result shows that classification accuracy for both methods achieves 100%.]]>
<![CDATA[Atmega Microcontroller 2560 Based Safety System of Monitor Panel and Controller on a Small Excavator ]]>
<![CDATA[Baharuddin, Randis]]>;
<![CDATA[Hidayat, Taufik]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 11, No 3 (2020) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2020.011.03.8
<![CDATA[This study aimed to design and build an Atmega Microcontroller 2560 based safety system on a monitor panel and a controller on a small excavator. Atmega 2560 Microcontroller-based alarm technology is the right choice as a solution to prevent theft of monitor panels and controllers on small excavator units, using Passive Infra-Red (PIR) sensor number 1 in the cabin room, PIR sensor number 2 on the battery, and door switch that is between the cabin and the door, if there is theft in the cabin room, then the alarm will be active, if a theft occurs in the battery then the alarm will be active. The alarm indicator system uses a buzzer (horn) unit, and there is additional lighting in the cabin room with a 24V Light Emitting Diode (LED) lamp if the alarm is active. Using an alarm, the risk of losing the monitor panel and controller due to theft on the unit can be prevented. The study results showed that the tool could work appropriately according to the standard testing tool, PIR sensors number 1 and 2 could detect movement or radiation so that the alarm would be active for 15 seconds. The door switch was tested by looking at the alarm condition, if the cabin door were closed when it was in the locked position, the alarm would not be active, but if the door was locked and forcibly opened, then the alarm would be active continuously without stopping until the door was closed again.]]>
<![CDATA[Efek Intermolecular Forces: Perubahan Physical Properties pada Campuran Premium dan Bio-Additive Orange Peel ]]>
<![CDATA[Musyaroh, Musyaroh]]>;
<![CDATA[Wijayanti, Widya]]>;
<![CDATA[Sasongko, Mega Nur]]>;
<![CDATA[Rizaldy, Ahmad Difal]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol 12, No 1 (2021) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2021.012.01.15
<![CDATA[The addition of bio-additive in gasoline was needed in order to improve the anti-knock quality. The bio-additive used was orange peel in the form of essential oil. Nevertheless, it make any changes of fuel properties affecting standard compliances: physical properties, engine performances and exhaust gas emissions due to some main compound effects of orange oil; limonene up to 90%. The recent study aimed to analyze the blends of bio-additives and premium gasoline experimentally related to improve the fuel properties theoretically. By verifying the blends, they were tested at blending concentration ratio from 1% to 75%. For each blend, the physical properties; kinematic viscosity, density, and calorific value were measured using ASTM D 445, ASTM D 92, and ASTM D 250. The results show that the limonene gave many impacts on the change of properties fuel. Limonene is a non-polar compound with high intramolecular force intensity. It causes a spontaneous dipole and gave propagation effect on premium gasoline molecular compound. The effect influences dynamic molecular distribution by increasing the attractive force between opposite pole of premium gasoline and bio-additives blend. The decrease of intermolecular movement intensity will decrease the viscosity of the mixture. In contrary, the kinematic viscosity of the mixture will increase with increasing bio-additive concentration. In other pysical properties, the premium gasoline-bio-additive blends have low density at 1%, 5%, 10% and 25% addition concentration but it has high heating value of fuel blends.]]>
