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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
Location
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.
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Articles 14 Documents
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Search results for , issue "Vol 5, No 1 (2014)" : 14 Documents clear
Optimasi Proses Multi-Pass Equal Channel Angular Pressing dengan Simulasi Komputer Choiron, Moch. Agus; Anam, Khairul; Prasetyo, Totok Tri
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

UFG (Ultra-fine grained) material is a material with a grain size between 10 nm to 1000 nm were developed to improve the quality of the material microstructure byreducing the grain size. Equal Channel Angular Pressing (ECAP) is a method to produce the UFG material by utilizing the shear stress on the material. Shear stress distribution in the material as it passes through the channel intersection is important to investigate so that it can be known the die design that can produce a uniform shear stress distribution in the material. In this study, computer simulation of multi-pass ECAP is carried out as the initial prediction for reducing the trial- error ECAP process. Multi-pass ECAP process is modeled with software based on Finite Element Method (FEM). Optimization is done with L9 Taguchi which parameters arenumber of pass, angle of intersection, outer fillet, and friction coefficient. By measuring the distribution of shear stress and plastic strain on the model will be generated optimization of multi-pass ECAP process.In the present study, the optimum setting for equal channel angular pressing prosses are pass of 6,intersection angle of 90 , outer fillet radii of 2 mm and coefficient friction of 0,1.Keywords: ECAP, multi-pass, Taguchi method, shear stress, plasticstrain.
Analisis Proses Blanking dengan Simple Press Tool Rizza, Muhammad Akhlis
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Blanking production process will be required for mass production due to good product quality and lower production costs. For mini wrench products, blanking process can be done with a simple press tool. This analysis starting with design, manufacturing and than analysis. It’s concluded that the construction of simple press tool are Plate Material (ST 60), Pillar Material (ST 60), Punch and Dies Material (SKD 11 with 15 mm thickness and 0.108 mm clearance), stripper material (ST 37), the punch holder material (ST 37), and the stopper material (ST 37). Forces acting on the machine press tool are cutting force (37 kN), clamping force (371 N), and power press machine (8.5 kW).Keywords: Blanking, press tool
Perilaku Rambat Retak di Daerah Lubang yang Terekspansi pada Aluminium Alloy Syahrizal, Syahrizal; 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

Mechanism of crack propagation is done by loading the cycle against the perforated metal material will be difficult to avoid, to fatigue crack growth rate can be a way to expand its peg with the hole that normally uses metal balls as an alternative. By using a materials testing machine type cantilever bending eccentric crank, life time of the materials are determined. Research using the method of cold expansion hole in the aluminum alloy metal material to a hole with a diameter of 5 mm in expansion using pin with variation of  5,1 mm,  5,15 mm and  5,2 mm made that crack found on the side of the hole would be difficult to propagate due to residual stress comparison. The result shows that there are residual stresses around the hole which varies depending on the diameter of the pin. In addition, there is growing tensile residual stress within a certain distance of the specimen being tested resulted in a faster growth rate, this causes the material usage time will be shorter.Keywords: cold expansion hole, materials testing machine, aluminumalloy, comparison residual stress, life time.
Optimalisasi Destilasi Nilam Kering melalui Pembekuan Pra Destilasi Sugiarto, Sugiarto; Sonief, A. As’ad; Sutikno, Djoko; Widhiyanuriyawan, Denny
Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The process of extracting oil from the leaves or stems cells by damaging the cell which usually done before or during distillation process. Damaging the cell can be done by mechanical process or freezing process. Chopping the leaves was done to damage the cells through the mechanical process, however the damage have not been able to destroy up to the celular level. While the freezing process could be expected to damage the tissue at the cellular level. Pure research on laboratory scale was used as the experiment method in this study. Freezing temperature pasca-distillation was variated on -13,4 ºC, -19,6 ºC and -24,8 ºC and without freezing process. While distillation process was varied on 95 ºC, 105 ºC dan 115 ºC. In this study, patchouli was distilled on wet and dry condition. LPG was used with automatically combustion control system of for keeping the temperature stability, increasing the capacity and quality of patchouli oil and reducing the production cost and the distillation time to less than 6 hours The stable distillation temperature was able to raise the volume of oil per kilogram of dry weight raw material and decrease the distillation time to less than 5 hours. Patchouli oil volume produced per kilogram of dry raw materials post freeze predistillation increased with increasing the distillation temperature. The low freezing temperature of the pre-distillation produced the high volume of patchouli oil per kilogram of raw material. Pre-distillation on the freezing process of dried patchouli was able to shorten the time of maximum distillation only in 3 hours. The range of distillation temperature on 95 ⁰C, 105 ⁰C and 115 ⁰C produced the different colors of patchouli oil from light brown to dark brown color.Keywords : optimalisation, distillation, dry patchouli, freeze pre-distillation

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