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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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Rekayasa Mesin
Published by Universitas Brawijaya
ISSN : 23381663     EISSN : 24776041     DOI : 10.21776/ub.jrm
Core Subject : Engineering,
Mechanical Engineering
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.
Arjuna Subject : -
Articles 965 Documents
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PENGARUH INTERLAYER PASTA (ZINC+TAPIOKA) PADA SAMBUNGAN FSSW MATERIAL ALUMUNIUM PADUAN Saputra, Lingga Arti
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1740

Abstract

Aluminum metal is widely applied in the industrial sector because it has many advantages. FSSW welding is a method that can be used to join aluminum. The microstructural test results show the flow distribution of the zinc interlayer in the welding area. The flow of zinc material looks dominant in the steering zone area. The hardness test results for the connection with zinc interlayer had the highest value of 147HV. Highest shear tensile testing on joints using zinc interlayer. The use of zinc interlayer has been proven to significantly improve connection capabilities.
GREENHOUSE SYSTEM WITH FORCED AIR FLOW FOR PRE-DISTILLED KAFFIR (CITRUS HYSTRIX) LEAF TREATMENT Cahyani , Chandrawati; Nurhadianty, Vivi; Sarosa, Aji Hendra; Muttaqin, Moch Fitron; Hidayat, Fahrul Huzain; Sarumpaet, Dicky Gabriel Partogi; Safitri , Mellyantika Alga; Miranti , Thiara Jatayuning; Rifdah, Naufaliyah Rifdah
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1741

Abstract

The greenhouse effect, which is a global issue, can provide benefits in the agricultural sector, especially in the processing of essential oils, which require drying raw materials before being purified. This is necessary to increase process efficiency, one of which is processing kaffir lime leaves. Drying is generally done in a simple way, but it has problems such as high-water content (approximately 15%), unstable weather, and slow drying speeds that cause leaf damage and fungus affecting essential oil quality. The solution is to utilize suitable technology, such as a greenhouse system. The study compares greenhouse drying methods with forced airflow and open sun drying, focusing on moisture content. The moisture content was measured using a moisture balance at each drying time. The result is that Greenhouse Force Circulation (GFC) drying effectively decreases kaffir lime leaves' moisture compared to Open Sun Drying (OSD), as evidenced by its higher drying rate.
DETERMINATION OF PROCESS PARAMETER FOR INJECTION MOLDING : A REVIEW Arifin, Muhammad Alfattah; Pranoto, Hadi
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1758

Abstract

One of the most suitable methods for mass production of complicated shapes is injection molding due to its superior production speed and quality. Plastic injection is the process of forming products from plastic materials with variations in shape and size. Controlling the quality of plastic products is an important aspect of the plastic injection molding process. To achieve high process effectiveness and desired product quality, correct and precise parameter settings are essential. One of the benchmarks for assessing the productivity and efficiency of an industry is to look at the level of product defects that occur in producing a product. This article aims to provide a brief review of the explanation of injection molding, types of molding, types of injection failure, experimental methods in determining injection molding parameters. Types of failure in the injection process such as short shot, weld mark, warpage, sink mark, air trap, black spot, flashing, hole, over molding, delamination. The experimental method determines parameters such as the Taguchi method, ANOVA method, hard computing techniques. The future will likely tend to use AI techniques as has happened with other methods in manufacturing processes to complement conventional techniques in determining injection molding process parameters.
REVIEW ON RAMS ANALYSIS FOR RAILWAY VEHICLES WITH POTENTIAL APPLICATION IN RAILWAY SYSTEM OF INDONESIA Muzakki, Sofyan; Gunawan, Leonardo; Rachman Setiawan; Kariem, M. Agus
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1781

Abstract

Railway vehicles are critical for ensuring the reliability and safety of trains, and their complexity has grown with technological advancements. RAMS analysis (Reliability, Availability, Maintainability, and Safety) has become a popular method for assessing the functional requirements of these vehicles. This review specifically investigates RAMS analysis for railway vehicles, aiming to identify trends, developments, key research challenges, and potential application in railway system of Indonesia. By thoroughly reviewing relevant articles, it explores various aspects of RAMS analysis, conducts comparative analyses, discusses potential research directions, and highlights advancements and usage in railway vehicle contexts. The methodology involves formulating research questions, searching the Scopus database for records, and applying assessment criteria to select eligible articles. Results reveal recent developments, distribution of articles, and studies focusing on reliability, availability, maintainability, and safety. This review offers valuable insights into the current state of RAMS analysis for railway vehicles and guides future research and development in this area.
ANALISIS PERFORMA RDF DENGAN PEREKAT LIMBAH ORGANIK UNTUK MEMENUHI STANDAR MUTU INDUSTRI Tambunan, Alvian; Prawoto, Prawoto; Hardiyanto , Catur
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1782

Abstract

This study aims to obtain RDF adhesives made from organic waste and to determine the effect of adhesives on RDF performance. The method used in this research is the experimental method. The data analysis technique used is descriptive quantitative. The various types of adhesives used are waste banana peels, cassava peels, and cocoa peels. The ratio of the composition of RDF and adhesive waste is 9:1 mass unit. RDF material is mashed and filtered using mesh 10, after being mixed with adhesive then pressed with pressure 5; 7.5; 10; and 12.5 bar, then dried in an oven at 150 0C for 3 hours and dried in the sun for two days. RDF testing was carried out by proximate for water content and ash content, by bomb calorimeter for calorific value, and by Shore Hardness Test for hardness. The results showed that waste banana peels, cassava peels, and cocoa peels can function as RDF adhesives for organic waste and meet industry standards, replacing plastic or flour-type adhesives that have been used so far. The calorific value, moisture content, and ash content of RDF with the three adhesives were (5495.410 cal/g, 7.78%, and 16.74%) for banana peel adhesive, (6068.007 cal/g, 6.18%, and 17.14%) for cassava peel adhesive and (5,504.438 cal/g, 5.36%, and 17.19%) for cocoa shell. The results of the hardness test of RDF materials with the three adhesives each with variations in pressure showed (6 Shore D 5 bar, 8.5 Shore D 7.5 bar, 13 Shore D 10 bar, and 19 Shore D 12.5 bar) for banana peel adhesive, (6.5 Shore D 5 bar, 10 Shore D 7.5 bar, 14 Shore D 10 bar, and 20 Shore D 12.5 bar) for cassava peel adhesive and (8 Shore D 5 bar, 12 Shore D 7.5 bar, 18 Shore D 10 bar and 24 Shore D 12.5 bar) for cocoa shell adhesive.  
ANALISIS KUALITAS GAS BUANG PADA STEAM BOILER BERBAHAN BAKAR BIO-SOLAR DAN BATU BARA Ar Rasyid, Moh. Rizal; Anis, Samsudin; Susanto, Susanto; Danang, Setio Wardana
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1783

Abstract

Steam boilers fueled by biodiesel and coal are one of the industrial activities that still produce exhaust emissions such as Total Particulate (PM), Sulfur Dioxide (SO2), Opacity, Nitrogen Oxide (NOx), and Carbon Monoxide (CO) which is very dangerous for public health and the environment. Therefore, analysis of flue gas emissions in steam boiler installations equipped with filtration devices (cyclones, water scrubbers, and electrostatic precipitators) before being discharged into the environment is of important. Exhaust gas emission was measured by using a gas analyzer, smoke tester, and portable quality air monitor. The results of exhaust gas emission analysis showed that the average concentration of PM, SO2, and CO did not meet the specified emission quality standard thresholds, exempted for opacity concentration for both steam boilers fueled with biodiesel and coal. It is suspected that this is caused by the sub optimal performance of the filtration equipment used in this system. Therefore, regular maintenance is required, and if necessary, a redesign of the entire system can be carried out.
PERANCANGAN ALAT PENCEKAM UNTUK PEMESINAN POLYURETHANE FOAM PADA PROSES FACE MILL CUTTING MESIN CNC ROUTER 3 AXIS DENGAN METODE VDI 2221 Utomo, Archi Kun Cahyo; Ubaidillah, Ubaidillah; Raharjo, Wijang Wisnu; Fitrian Imaduddin; Dikky Kusuma Wijaya
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1798

Abstract

Due to the highly brittle structure of polyurethane (PU) foam, a specialized clamping mechanism is required to consider the material's strength and hardness to avoid damaging the workpiece and to withstand the cutting forces during milling and machining. Using a polymer as an alternative for creating clamping tools with characteristics similar to PU foam offers a promising solution. The slightly harder polymer material is expected to address the need for a gripping tool that will not harm the PU foam upon application. The VDI 2221 method, a structured approach to the design and coordination of evolving design techniques, is employed in this study. The advantage of this methodology lies in its ability to adapt continuously through research. A comparative analysis of two design models produced via 3D printing reveals that Design 5 exhibits superior strength under increased stress. Moreover, Design 5 is more effective in gripping the workpiece, as a single gripper can withstand cutting forces from two directions simultaneously, reducing material deformation. This advancement is expected to minimize the risk of material damage during the machining process. This research's novelty lies in applying an optimized polymer clamping device for PU foam, ensuring improved performance and reduced damage during machining.
PENGARUH PARAMETER PEMESINAN TERHADAP KEKASARAN PERMUKAAN AI6061BE PADA PEMESINAN CNC MINI 500 WATT MENGGUNAKAN PAHAT KARBIDA STRAIGHT ENDMILL Napitupulu, Richard A. M.; Perangin angin, Siwan E.A.
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1812

Abstract

The role of automatic machining with the help of computer programming such as Computer Numerically Controlled (CNC) has become commonplace today in both large and small industrial sectors or micro industry. CNC is a manufacturing process where previously programmed computer software is converted into code that can automate machining movements, one of which is the milling or lathe process. CNC performance is determined by machining output power. For micro industrial or laboratory scale, CNC with low power is usually used to cut soft materials such as wood, acrylic, aluminum and others. This is the basis for this research to look at the influence of machining parameters such as speed, depth of cut and feed rate on the surface roughness (Ra) of AI6061BE aluminum workpieces in the dry machining process on a mini CNC unit with a maximum spindle power of 500 watts. This research uses an experimental design based on the Taguchi method and takes the form of an L16 (43)  orthogonal matrix. The chisel used is a Straight End Mill 2 fluke carbide chisel. The experiment was carried out 4 times cutting in the positive x-axis direction and 4 times in the negative x-axis direction for each variation of machining parameters. From the test results, surface roughness, feed rate is a parameter that is more influential than speed and depth of cut.
PERILAKU OKSIDASI ISOTERMAL PADUAN 68,5Fe-14Ni-9Al-7,5Cr-1Mo PADA TEMPERATUR 800, 900, DAN 1000°C Muhammad, Fadhli; Basuki, Eddy Agus
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1814

Abstract

Extensive research has been conducted on high-temperature alloys for power generation, with chromium-forming ferritic iron as the primary basis for these materials. However, the practical applications of these materials are limited to temperatures below 800°C. This study addresses the development of an alumina-forming 68.5Fe-14Ni-9Al-7.5Cr-1Mo austenitic iron-based alloy, isothermally oxidized at 800, 900, and 1000°C for 1, 10, 50, and 150 h, respectively. The formation of the protective layer was characterized using X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) attached in a scanning electron microscope (SEM). The thickness of the oxide layer was quantified using the ImageJ software. XRD analysis of the sample that had been oxidized for 150 h at various temperatures revealed the presence of Al2O3. The clustered grain morphology was observed at the sample's surface oxidized for 150 h at 800°C. In contrast, the sample oxidized at 900°C exhibited a hair morphology, and the sample oxidized at 1000°C exhibited a wrinkled morphology. EDS mapping of all samples revealed that O and Al dominated the oxide scales. Measurements of oxide thickness indicated an accelerated growth phase during the first 10 hours of exposure, which was subsequently followed by a gradual slowing down in growth rates over more extended periods of time
STUDI IDENTIFIKASI PASANGAN COMMERCIALLY PURE TITANIUM DAN UHMWPE UNTUK APLIKASI MATERIAL IMPLAN LUTUT Rusdi, Firman Maulana; Cahyani , Arini Dwi
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1820

Abstract

Orthopedics is a science that studies the human body skeleton. This field of science helps patients who experience joint and skeletal problems. One of the problems faced is the need for body frame components to be replaced, for example the knees. This replacement requires a man-made component, namely an implant. Implants can be made from metal, polymer, and ceramic. The biomaterial implant identification process includes X-Ray Diffraction analysis, hardness and tensile testing. XRD testing of CP–Titanium and UHMWPE using the Rigaku XRD tool. CP–Titanium hardness testing uses Vickers micro hardness, while for UHMWPE uses Shore D. CP–Titanium tensile testing uses a universal test machine with JIS Z2201 standards. Another material, namely UHMWPE, is tested using the same equipment as the ASTM D638 standard. The XRD test results for CP - Titanium show peaks of 35.3˚, 38.6˚, 40.2˚, namely the hexagonal structure of the compound element α - Ti. Meanwhile, UHMWPE material shows peaks (110) at 21.66˚ and (200) at 24.16˚. The peak data is an orthorhombic crystal structure, which is characteristic of polyethylene. The CP – Titanium hardness test results show an average hardness of 360.47 VHN. The hardness value of UHMWPE shows an average hardness of 48.5 Shore D. CP - Titanium tensile testing shows a maximum stress value of 534.4 MPa and a maximum strain value of 0.022. The UHMWPE tensile test showed an average maximum stress value of 23.87 MPa and an average maximum strain value of 1.36. The data above shows that the materials tested are CP - Titanium and UHMWPE. Hardness data indicates that these CP – Titanium and polyethylene materials are too soft for applications requiring wear resistance.

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