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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.
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Articles 31 Documents
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Search results for , issue "Vol. 14 No. 1 (2023)" : 31 Documents clear
PENGARUH LAJU ALIR TUNGSTEN IN-ERT GAS TERHADAP KEKUATAN TARIK DAN KEJUT PADA SAMBUNGAN LAS TIG BAJA GALVANIS DAN ALU-MINIUM 5052 DENGAN FILLER AL-SI 4043 Redi Bintarto; Moh. Syamsul Ma’arif; Denny Widhiyanuriyawan; Teguh Dwi Widodo; Rudianto Raharjo; Nugroho Adi Purnomo
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.656

Abstract

This study aims to determine the effect of the protective gas flow rate on the tensile and shock strength of welded joints of dissimilar metals, namely aluminum 5052 – galvanized steel with Al-Si 4043 filler using argon gas as a shielding gas. The protective gas flow rate parameters used in this study were 14, 17, and 20 liters/minute with a current of 80 A. The results showed that the higher the flow rate of the shielding gas, the lower the porosity defects that occurred in the welding results, resulting in higher tensile and shock strength values. Based on the analysis through the results of penetrant testing, it shows that the addition of the protective gas flow rate is given to reduce the porosity defects in the welding area. The surface area experiencing porosity decreases with the addition of the protective gas flow rate of 14, 17, and 20 liters/minute of 59.748%, 50.918%, and 48.857% respectively. The highest tensile strength was obtained from welding with a protective gas flow rate of 20 liters/minute of 20.01 MPa, then a protective gas flow rate of 17 liters/minute of 16.32 MPa, and the lowest at a protective gas flow rate of 14 liters/minute of 10 ,44 MPa. The highest shock strength is obtained from welding with a protective gas flow rate of 20 liters/minute of 0.5644 mJ/mm2, then a protective gas flow rate of 17 liters/minute of 0.4048 mJ/mm2, and the lowest is a gas flow rate protection 14 liters/minute of 0.2981 mJ/mm2.  
PENGARUH UKURAN PARTIKEL SERBUK EVAPORATION BOATS DALAM PEMBUATAN KOWI (CRUCIBLE) TERHADAP KEKUATAN IMPACT DAN STRUKTUR MAKRO Jurdan Fulandy Siswoyo; Rusiyanto Rusiyanto; Rahmat Doni Widodo; Sunyoto Sunyoto; Deni Fajar Fitriyana
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.806

Abstract

Kowi or crucibles come from refractory materials. This study aims to determine the effect of the powder particle size of evaporation boats on impact resistance and macro structure. The research method used is experimental research. The variation applied was a variation of the particle size of the evaporation boats (80, 100, and 120 mesh) as much as 50% (grams) mixed with 25% (gram), kaolin, and 25% (gram) mortar. The mixture of these ingredients is added 15% (grams) of water from the total weight of the mixture. Mixing using a mixer for 1 hour and adding water. Then the material is put into a specimen mold with ASTM D256 standards and compacted at 60kg/cm2 using a hydraulic press. Sintering at 1000ËšC was carried out using an oven with a heating rate of 5ËšC / minute and a holding time of 2 hours. The highest impact price on average of 0.002828936 Joule/mm2 was obtained for the use of mesh 120 evaporation boats particle size and the lowest average impact price of 0.002633081 Joule / mm2 was obtained for the use of mesh 80 evaporation boats powder particle size. The macro structure of firing results and the best density is obtained from the use of the mesh 120 and 100 evaporation boats particle size and a fracture occurs on the flatter surface of the specimen than 80 and 100 evaporation boats mesh.
RANCANG BANGUN GRIPPER ROBOT MANIPULATOR 2 DOF KAPASITAS 1,25 KGF Sirojuddin Sirojuddin; Siti Solikhah; Ragil Sukarno; Muhammad Izaz Tamami
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.999

Abstract

Manipulator robots practically help human to move objects vertically, horizontally, or rotationally. The robot is generally divided into three components, namely arm, base, and gripper with servo motor drive. The aim of this study is to improve the previous gripper robot manipulator design so that it can move 2 DOF (Degree of Freedom) by adding 1 DOF located on the robot gripper, which in previous studies, the robot manipulator gripper was only able to move 1 DOF. In addition, after calculating using Von Mises theory, then design 2D components and this assembly using AutoCAD software. Next design 3D components and assembly using Autodesk Inventor application based on FEM (Finite Element Method). Will also make a tool in the form of a robot gripper which will later be tested for feasibility. Based on the calculating result, the minimum thickness of the most significant link is 5.1 mm. To make it easier to find plates and save costs, the thickness of all plates in each link is rounded up to 6 mm. From the result of the movement simulation, it is found that the gripper can move open, clamp and rotate, and from the FEM software result the Safety factor value = 3.58 >3.0. Meanwhile, based on the result of the feasibility test, the gripper robot manipulator is feasible.  
PENGARUH JARAK DAN PANAS SINAR LASER TERHADAP HASIL ENGRAVING PADA MATERIAL KAYU MENGGUNAKAN MESIN CNC LASER DIODE Didik Sugiyanto; Aep Saeful Uyun; Dzul Mujahid Jihad
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1036

Abstract

Testing the effect of distance and laser beam heat on engraving results using two specimens as test materials, namely teak wood and durian wood. The testing process is to make circles and rectangles with a diameter of 20 mm which are inputted into the program followed by the engraving process. The results of the engraving are measured how many differences occur so that the results that are closest to the level of precision are obtained with variations in distance and heat in the laser beam. From the results of the distance test, it was found that durian wood has a more precise engraving accuracy with a size of 0.15-0.35mm, while for teak wood with a size of 0.2-0.4mm. With reference to the general tolerance of medium in sizes >6-30mm is 0.2mm, the best result for the use of spacing is 70mm. From the results of laser heat testing, it was found that durian wood has a more precise engraving accuracy with a size of 0.05 - 0.7mm, while for teak wood with a size of 0.1-0.8mm. With reference to the general tolerance of medium in size >6-30mm is 0.2mm and size >30-120mm is 0.3mm, the best temperature result for use is 400C with a tolerance size of 0.05mm.
DESIGN DAN PEMBUATAN PEMODELAN ENERGI HYBRID BERBASIS ENERGI MATAHARI DAN ENERGI HYDRO DENGAN BACK FLOW WATER SYSTEM Heri Suripto; Saiful Anwar; Amri Abdulah
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1059

Abstract

Hybrid power is a combination of two or more alternative energy sources to produce high-efficiency electrical energy under different load conditions. Hybrid energy research has been carried out through previous research, including combining solar and wind, solar and biomass, hydro, thermal, wind, solar and solar with thermoelectric generators. This study designs a hybrid power plant model based on solar and hydroelectricity with a water circulation system. Water falling from the upper reservoir into the lower reservoir is returned to the upper reservoir using an electric pump, and this study is a development of previous research related to alternative hydropower. The method used in this study is the Pahl and Beitz method, including design sketches, material selection, fabrication, and testing phases. The solar cell frame design produced by the Pahl and Beitz process is 100 cm high and 65 cm wide, and the module type used is a 3-piece polycrystalline module. The average power output produced by the 3 solar panels to the cells was 19.76 watts. The test produced 850 watts of total hybrid power, 600 watts DC from solar, and 250 watts DC from hydro.
PENGARUH CLEARANCE DAN PEMBEBANAN RADIAL TERHADAP PERPINDAHAN, DISTRIBUSI BEBAN KONTAK, DAN KEKAKUAN ELEMEN ROL PADA SPHERICAL ROLLER BEARING Hendery Dahlan; Rahmi Safitri; Meifal Rusli; Mulyadi Bur
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1065

Abstract

This study aims to determine the effect of clearance and loading regarding to the displacement, distribution of contact loads and stiffness of spherical roller bearings at rest. The displacement formulation of the inner ring of the bearing was developed by defining the angle of inclination of the roller element to the axis of shaft. The comparison between exact calculations using the Matlab program and numerical modeling with MSC Marc for the displacement has an error value of less than 10%. Therefore, the displacement formulation of the inner ring of the bearing is used to calculate the exact distribution of contact load and stiffness of the spherical roller bearing and numerical modeling. The results revealed that the effect of clearance and loading on the displacement of the inner ring of the spherical roller bearing is directly proportional. The contact load of the bearing roller element is distributed over the part of the roller element that is in contact with its path, where the largest contact load occurs at the position of the roller element parallel to the axis of the shaft at rest. Meanwhile, bearing stiffness will decreases with increasing the value of clearance.  
KARAKTERISASI SIFAT MEKANIK DAN STRUKTUR MIKRO PADA BAJA PADUAN RENDAH HASIL PROSES HARDENING Moch. Chamim; Margono Margono; Fatimah Nur Hidayah; Nugroho Tri Atmoko
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1080

Abstract

The purpose of this study was to determine how the mechanical properties and microstructure formed on low alloy steel (tooth bucket) heated at temperatures of 850 ⁰C and 850 ⁰C then held for 15 minutes after that it was cooled with oil. The material hardening process was carried out by testing the Vickers hardness, impact, and observing the microstructure using an optical microscope with 200x magnification. Hardness values obtained from low alloy steel after heat treatment at temperatures of 800 ⁰C and 850 ⁰C are 389.2 HV and 414.6 HV. The optimum hardness is obtained at a temperature of 850 ⁰C with an increase of about 1.14% compared to that of raw material, which is 364.5 HV. From the results of the impact test on heat treatment with a temperature of 850 ⁰C, the highest impact value is 0.574 Joule/mm2. Furthermore, the results of the microstructure on heat treatment at a temperature of 850 ⁰C resulted in homogeneous microstructures, namely chrome, martensite, and bainite.
KARAKTERISASI BIODIESEL PRODUK TRANSESTERIFIKASI MENGGUNAKAN VARIASI KECEPATAN SENTRIFUGASI PADA PROSES PEMISAHAN FAME Sukhma Kusuma Dewi; Lilis Yuliati; Agung Sugeng Widodo
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1082

Abstract

The biodiesel production by transesterification method has five stages, namely: (1) the preparation process; (2) the transesterification process, (3) the separation process, (4) the washing process; and (5) the drying process. Separation occurs independently using a split funnel and gravity force, which takes approximately 120 minutes. The length of this separation process makes it less time efficient in the biodiesel production process. Therefore, a centrifuge separates FAME and glycerol while accelerating the process. This study aimed to determine the quantity and quality of biodiesel made from CPO and VCO using centrifugal speed and separation time variations. The rotation speed is varied between 2000 rpm and 4000 rpm, while the separation times are 5 minutes and 10 minutes. The result showed that the highest quantity of biodiesel from CPO and VCO was obtained using high centrifugation speeds of 4000 rpm and a 10-minute separation. The result showed biodiesel produced with this variation has good quality which met with SNI.    
PENGARUH TINGGI CELAH ALIRAN PADA SLUICE GATE TERHADAP KINERJA KINCIR AIR JENIS SUDU MELENGKUNG Ridho Dwi Syahrial; Rudy Soenoko; Teguh Dwi Widodo; Alfeus Sunarso
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1095

Abstract

This study aimed to determine the effect of adding the sluice gate and the optimal width of the sluice gate on the waterwheel performance. Tests have been carried out experimentally on a laboratory scale. In the test, this study used an open channel waterwheel with variations in the flow gap width gate width of 25mm, 35mm, and 40mm. Each variation of the flow gap width will be tested at a flow rate of 12 liters/second. Parameters such as mill power, turbine torque, and efficiency will be determined based on the measurement results of the rotational speed of the waterwheel wheel, water level, and braking load. The results showed that the width of the sluice gate flow gap affects the performance of the waterwheel. The highest performance was obtained at a flow gap of 25mm followed by a flow gap width of 35mm, and the lowest performance was obtained at a variation of the slit width of 40mm. The maximum performance of the waterwheel is obtained at variations in the width of the flow gap of 25mm at 50 rpm rotation conditions with a discharge of 12 liters/second where liters were generated 15.06 watts and the efficiency 29.82%.
RANCANG BANGUN ALAT BANTU PEMASANGAN PEGAS STRIPPER PRESS TOOL DENGAN SISTEM HIDROLIK Meri Rahmi; Yuliar Yasin Erlangga; Aida Mahmudah; Badruzzaman Badruzzaman; Felix Dionisius
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1098

Abstract

A press tool is used to cut or form a thin plate into the desired shape with a pressing process or a press machine. One of the main things in the design of the press tool is the calculation for determining the type, size and, material of the spring. The spring in the press tool design is placed on the stripper as a pressure plate material before it is formed. The problem that often occurs in the design of the press tool is the initial force of the spring and the number of springs often have high values. This has an impact on the difficulty of the operator in installing the spring during assembly. The installation on the press machine requires more energy that exceeds the operator's power. This problem is often a challenge in itself both in terms of designing and manufacturing press tools. Assumptions and limitations of the problem of the design is 12,64 kN. This force is used for the educational practicum materials. Based on the design calculations the number of springs needed are 4 springs. While the hydraulic required is 10 tons. The results obtained based on simulation analysis using Solidworks software, show that with the number of springs and hydraulics calculated and based on the design form of the stripper installation tool, it is in the safe category.

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