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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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Kota malang,
Jawa timur
INDONESIA
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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Optimalisasi Sistem Perawatan Dan Perbaikan Terencana Mesin Produksi Berdasarkan Analisis Keandalan Pada Pltd Hatiwe Kecil Kota Ambon Demmatacco, Frederik; Soeparman, Sudjito; Soenoko, Rudy
Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Based on preliminary surveys, PLTD X has been operated long enough so that the generator engines often impaired even cause damages during operation. Even maintenance system contained in the PLTD X also has not done, which means there decrease in the production of electrical power generated.Maintenance activities that have been performed by PLTD X is the replacement of engine components damaged as a rejuvenation effort and overhaul that aims to extend the lifespan of the machine, but it is also the act of Preventive maintenance which aims to treat the machines that do not damage or interruption in operation. The dispute resolution process is the method for analyzing the Reliability Centered Maintenance component failure with FBD, System function and functional failure, FMEA and RCM Decision Worksheet. It also can determine the value of Mean Time To Failure (MTTF) and Mean Time To Repair (MTTR) is used to analyze systems engine maintenance. and as a basis for determining the time interval maintenance and total cost of maintenance.Based on the results of the calculation known critical components such as Cylinder Head, Inlet valve, Gasket, Exhaust Valve Housing, Exhaust Valve. Component maintenance time intervals determined by the RCM method is as follows, Cylinder Head with interval 4458 hours, Inlet Valve with 1601 hour, Gasket with 4682 Hours, Exhaust Valve Housing with 1908 hours, Exhaust Valve with 2238 hour. Critical component consisting of Cylinder Head, Inlet Valve, Gasket, Exhaust Vave Housing and Exhaust Valve is usingSchedulled Restoration Task type of maintenance.Keywords: critical components, decision worksheet RCM, FMEA, PLTD X
Implementasi Konsep Lean Manufacturing Untuk Meminimalkan Waktu Keterlambatan Penyelesaian Produk ”A” Sebagai Value Pelanggan (Studi Kasus Pt. Tsw (Tuban Steel Work) Nuruddin, Abdul Wahid; Surachman, Surachman; Setyanto, Nasir Widha; Soenoko, Rudy
Jurnal Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

PT. TSW (Tuban Steel Work) is a company engaged in manufacturing fabricated (make to order) with the commitment and the goal of providing effective services, convenient and timely delivery. But in fact, the company's commitment to the purpose can not be achieved that delays the project completion time is not in accordance with the order due date. Based on the observations made in the study, this is due to some events that can not add value or called by the waste (non-value added). This study aims to identify waste, analysis of contributing factors and recommendations for improvement as the system improvement efforts in creating customer value. By using the concept of lean manufacturing this study begins by describing the current state map and weighting of the waste system, waste weights were analyzed by matrix VALSAT used to identify waste in the system, to analyze the causes of waste by fishbone diagram to illustrate the root cause of waste and failures mode system analysis using failure mode and effect analysis (FMEA) to determine the value of risk priority number (RPN) of the potential causes and potential effects of waste that occurs. The results showed that the waste that occurs is that there are waiting on purchasing activities (supplier), marking-up cutting and fit-up welding. From the discussion, the company recommended improving information systems internal-external (supplier) as well as improvements in the fabrication process activities.Key words: lean manufacturing, VSM, VALSAT, RCA, fishbone diagram, FMEA, SCRM, VMI.
Karateristik Medan Kecepatan Aliran Setelah Melewati Internal Flow Double Skewed Wall Cyclone (IFC2SW) Widayana, Gede
Jurnal Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Efforts to improve the performance of the motor fuel is to add a cyclone before the carburetor that functions to increase the homogeneity of the mixture of air and fuel. In this study, conducted aerodynamic testing in line with Internal Flow Double Cyclone skewed Wall (IFC2SW) to be able to know how big the flow characteristics of the velocity field that arises after passing IFC2SW. The main parameters that will be used as an indicator is that the velocity profile obtained from the measurement of total pressure and static pressure in the duct cross section. Results showed that the characteristics of the velocity field after passing IFC2SW evenly along both the center channel and the channel wall.Keywords : Cyclone, Internal Flow Cyclone Double Skewed Wall
Analisis Thermal Fatigue pada Nosel Bejana Tekan Tipe Crack Gas Drier Darmanto, Darmanto
Jurnal Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Nozzle is one of the most critical component in a pressure vessel because of its sensitivity to thermal fatigue. The fatigue life of a top head nozzle of crack gas drier is calculted based on ASME NB—3216.1 module during fluctuative temperature cycle. The life of ten locations at the nozzle are caculated using two dimensions axisymmetric model. ABAQUS and ANSYS are used to analyze thermal fatigue. The life calculation result of the ten locations is infinite.Keywords : nozzle, thermal fatigue, ASME
Karakteristik Pembakaran Dan Sifat Fisik Briket Ampas Empulur Sagu Untuk Berbagai Bentuk Dan Prosentase Perekat Fretes, Evedore Fredo de; Wardana, I Nyoman Gede; Sasongko, Mega Nur
Jurnal Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Fossil fuel reserves are depleting to be anticipated by looking for alternative energy sources. Alternative energy that many developed and researched today is agricultural waste biomass fuel is formed into briquettes. In this research, briquettes are made from dregs the pith of sago in the four of form, namely : cylinders, blocks, cubes and prisms, with and without adhesive sago starch with the presentation of 5% and 10%.This research aimed to determine the effect form briquettes on the combustion rate and determine the physical properties of briquettes without carbonization process, with or without the addition of sago starch as an adhesive which include moisture content, ash content, volatile matter, fixed carbon and heating value.The results research that the form of briquettes affects the combustion rate where the fastest combustion speed was on briquettes form beams, cube and Prism. Percentage adhesive of sago starch affects the early combustion time where time is needed to ignite the briquettes greatest for percentage 10% and the lowest adhesive for briquettes without adhesives. Adhesive sago starch is also very influential on the moisture content, ash content, volatile substances, fixed carbon and heating value. Adhesive sago starch is also very influential on the moisture content, ash content, volatile matter, fixed carbon and heating value. The addition of adhesive sago starch lower heating value.Keywords: Briquettes, sago, Physical Properties, Combustion.
Pengaruh Penambahan HHO terhadap Kinerja dan Ionisasi Pembakaran Motor Bensin Akbar, Ali; Wardana, ING; Yuliati, Lilis
Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

This aim of this research was to conduct the effect of HHO which injected into the combustion chamber through the intake manifold of the gasoline four-stroke motorcycle engine. HHO is a mixture of hydrogen and oxygen was produced by water electrolysis process.The experiments were carried out by using the HHO generatorin intake manifold to produced HHO gas, which injected into the combustion chamber. The HHO gas injection was varied of 0 ml/s, 0.75 ml/s, 1.5 ml/s, 2.25 ml/s and 3 ml/s based on the engine shaft revolution (rpm). The engine shaft revolutions were also varied at 1700 rpm, 2200 rpm, 2700 rpm, 3200 rpm, 3700 rpm, and 4200 rpm. The engine performance (power output effectively, SFC, and thermal efficiency), the ionization combustion (burning voltage and burning time) and exhaust gas emissions (HC and CO) were investigated. The results show that the additionof the HHO gascould improve the performance of the gasoline four-stroke engine. The effective of power out-put and thermal efficiency increase as increase the HHO injection.The specific fuel consumption (sfc) was also decreases as increases the HHO injection. The ionization combustion much better, which the voltage products of combustion increase and combustion time decrease as increase the HHO injection. The addition of HHO gas was also improved the quality of exhaust gas emission which are reduce the content of CO and HC gases due tothe HHO enhance the combustion process. The hydrogen gas has a high diffusivity which can improve of the fuel mixing, turbulence and homogeneity. The hydrogen gas has the flamehigh faster than gasoline, therefore its decrease the burning time as increase the HHO injection.Keywords: HHO, Hydrogen, Ionization, Gasoline Engine, Emissions
Upaya Peningkatan Sifat Mekanik Baja Mild Steel Melalui Perbaikan Kualitas dengan Heat Treatment Annealing dan Holding Time pada Heat Treatment dengan Taguchi Method Rahmadianto, Febi; Purnowidodo, Anindito; Soenoko, Rudy
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The purpose of this study was to determine the ability of the mechanical tensile strength and hardness and microstructure of the steel material Mild Steel. The electrodes used were a new electrode, the electrode was added calium compound is then heated to 100 °C, 100 ° C and heated electrode. Strong currents are used 75 A, 85 A, and 95 A, for a distance of specimen 3 mm, 4 mm and 5 mm. This study used an experimental methodology and the research conducted in the laboratory. The test results showed that the maximum tensile strength is in the condition of the electrode plus a calium compound and heated at 100 ° C, 95 A current and a distance of 5 mm , with Heat Treatment 20 minutes is 278 N/mm2 . Similarly , for the region of weld metal hardness indicates the optimal hardness using electrodes were added and heated calium compounds 100oC , current 95 A and a distance of 5 mm , with Heat Treatment 20 minutes , which is 185 VHN . HAZ hardness to areas with the same test conditions with Weld Metals, hardness value is 371 VHN.Keywords: SMAW, current, Taguchi, optimum treatment.
Pengaruh Temperatur Larutan Triethylamine (Tea), Air dan Ca(OH) 2 terhadap Pelepasan CO 2 pada Proses Pemurnian Biogas Kurniawan, Zulkifli; Wardana, ING; Widhiyanuriyawan, Denny
Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Biogas is renewable fuel that generated by bacteria activities in anaërobic organic matter process. Biogas composed by CH 4 17 (54% to 70%), CO2 (27% to 45%) and impurities gas such as N2 , H2O, CO, H2S. The CO2 on biogas should be reduced because it’s as inhibitor that reduces heat of biogas flame. This research proposed to reduce CO 2 in the packed column purification system by using TEA, H2O, and Ca(OH)2 solution as absorber.The absorber temperature were variated 35o, 45o, 55omand 65oC for knowing performance absorber reduce CO2 at the flow rate of CO 2 and CH4 , entering packed collum by 0.1 l/m, release time of CO2 in heater was eight minutes by comparison CH4 , and CO2 i.e. 80 % -20 %, 85 % -15 %, 90 % -10 % and 95 % -5 %. The result of this study was the higher the temperature heating, the higher the percentage of CO2 released. Absorbentt TEA + H2O and combined TEA + H2O + Ca(OH)2 , improve absorption of CO2 in a linear manner at a temperature of warming 35, 45, 55, 65 c.Keywords : Biogas, Absorption, Temperature, TEA, H2O, Ca(OH)2
Pengaruh Fraksi Volume Filler terhadap Kekuatan Bending dan Ketangguhan Impak Komposit Nanosilika – Phenolic Diharjo, Kuncoro; Elharomy, Ischiadica; Purwanto, Agus
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The objective of this research is to investigate the effect of filler volume fraction on bending strength and impact toughness of nanosilica-phenolic composites. The research materials used were nanosilika powder, LP-1Q-EX phenolic resin, MEXPO catalyst and P-EX promotor. In this research, the filler volume fraction of nanosilica were varied into 10-60%. The composites were produced by using a hand lay-up method. All specimens were post cured at 100ËšC for 60 minutes. The specimens were conducted with universal testing machine and impact izod testing machine. The fracture surfaces of the specimens were observed by using scanning electron microscopy (SEM). This result showed that the addition of nanosilica increased the bending strength and impact toughness. The maximum bending strength and impact toughness occured on the specimens whose 30% of nanosilica (97,01 MPa and 8134,70 kJ/m ). SEM images showed better interaction of filler and matrix at 30% volume fraction of nanosilica.Keywords : composite, nanosilica, phenolic, bending, impact
Simulasi Pengendalian Kualitas Pengaruh Deformasi Material Condenser Tube terhadap Proses Tube Expanding Waterbox Condenser (Studi Kasus di PT. BBI Pasuruan) Pratama, Aditya Wahyu; Wahyudi, Slamet; Santoso, Purnomo Budi
Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Leakage tube after tube expanding process is still occurred in PT. BBI Pasuruan due to imperfect material deformation. Material deformation cause by a change in material form due to external forces such as temperature, friction force, compressive force, and the torque style. Deform 3D was used in this investigation to determine the material deformation processes. Taguchi method design of experiment was also used to minimize the bad cause of the poor performance is also influenced by several variables or factors on the characteristics of the desired quality. The results shows that the combination to prevent deformation of the material in the condenser tube are the friction between the tool and the tube expander of 0.787 inch, the material used is stainless steel ASTM A 249 grade 2, tube expanding process temperature optimum of 89.6 F, and expander velocity of 0.708 inches per second.Keywords: Taguchi method, design of experiment, tube expanding, material deformation

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