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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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PEMBUATAN DAN PENGUJIAN SIFAT MEKANIK WELDING SPESIMEN LOGAM DISSIMILAR AISI 1015 DENGAN AISI 304L MENGGUNAKAN PROSES GMAW Riswanda, Riswanda; Kadir, Harlian; Saragih, Albert
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1461

Abstract

The manufacture of specimens produced by MAG welding on the joining of metal plates not AISI 1015 with SS304L, must meet the welding standards used. Low carbon steel AISI 1015 and stainless steel SS304L were used in this experiment by applied different current variations to each sample, namely 120, 130 and 140A in MAG welding using ER70S6 electrode.  The results of the examination on the identification of the macro appearance in the heat affected area (HAZ) and Vickers microhardness and tensile testing were carried out in this study. From the data obtained, the hardness value of the weld metal is higher when compared to the parent metal between AISI 1015 and SS304L, and the hardness value of the weld metal is also higher due to the influence of the ER70S6 solid wire electrode used. The tensile strength and yield strength of MAG welded joints increased at 120 and 140A, and the fault position occurred in hypo euctectoid steel (AISI 1015) at the boundary between the heat affected area and the parent metal. The results of the research on MAG welded joints with a welding current of 120A is preferably used for joining dissimilar metals between low carbon steel (AISI 1015) and austenitic stainless steel (AISI 304L).
PENGARUH GEOMETRI DAN PENAMBAHAN JUMLAH SIRIP TERHADAP DISTRIBUSI TEMPERATUR HEAT SINK SEBAGAI ALTERNATIF PENDINGINAN PADA PIRANTI ELEKTRONIK Subekti, Fajar; Wahyudi, Slamet; Gapsari, Femiana
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1465

Abstract

This study aims to determine the effect of the geometry shape of the copper material heat sink fins on the surface temperature distribution of the heat sink. The material used in this research is pure copper, the shape of the heat sink fins is made rippled with the addition of the number of fins 5, 6, and 7 and the input temperature is varied from 40 C to 80 C with airflow variations from 0.2 m/s to 1 m/s. The first step is to create a heat sink design with Autodesk Inventor. Then the plan is simulated with Autodesk CFD to solve the continuity, momentum, turbulence, and energy equations. Based on the method that has been carried out, it is found that the addition of variations in the number of fins affects the decrease in surface temperature. The highest temperature drop on fin 5 ripples is 24.1 C. The heat energy transfer rate increased by 0.4657 W. The convection heat transfer coefficient  increased by 3.47 W/m²C. Nusselt number shows an increase of 271. Fin performance has increased efficiency by  63.4 %, and effectiveness by 1.61. The results of this study are expected to provide practical alternatives that can be widely adopted on a heatsink plate that is very promising for future thermal developments.
ANALISIS RELIABILITY DAN UMUR PAKAI BEARING 6207 DENGAN MENGGUNAKAN METODE WEIBULL Dwilestari, Charisma; Feriyanto, Dafit
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1467

Abstract

Bearing is a mechanical component that is used as a place where the shaft rests on its axis and rotates with the holder and the shaft. The use of these bearings is focused on reducing friction; therefore, the friction that occurs is getting bigger along with the load, pedestal, working temperature, and conditions of loading and rotation that occur on the shaft. Estimation of damage and bearing life will be carried out on several bearings from different brands, but with the same type and size. Bearings with type 6207 and bore diameter of 35 mm come from 7 brands, namely SKF-SS (the only type in this study that used stainless steel), SKF, NSK, NACHI, KOYO SEIKO, SKF, and NTN. This analysis is carried out using the Weibull method where bearing specification data is processed by entering data into existing equations and analyzing the results of the calculations performed. The dynamic load value affects the L10 value of 9.3217%, predicted R(t) 13.5349%, ηcat 9.2567%, and Actual Reliability 3.9158%, this is due to the relationship between each of the equations used. Based on the reliability value generated, it can be concluded that the type of bearing recommended is NTN.
EFFECT VARIATION OF TEMPERATURE AND STIRRING SPEED ON THE BENDING TEST OF FIBERGLASS FIBER COMPOSITE MATERIALS USING THE VACUUM ASSISTED RESIN INFUSION (VARI) METHOD Setiawan, Ferry; Sakti , Faras Bimo; Wicaksono, Dhimas
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.v15i3.1469

Abstract

This study aims to investigate the effect of temperature with constant agitation at 164 rpm on the fabrication of composite materials using the Vacuum Assisted Resin Infusion (VARI) method. In this research, composite materials were made with a polyester resin matrix reinforced with fiberglass. The challenge in the VARI process, which is the difficulty in controlling the viscosity of the solution when infused into the fibers, was addressed by using a stirrer in the feed resin tank. Heating was intended to increase the surface tension of the resin, allowing it to better penetrate the fibers. The variations used were stirring at a speed of 164 rpm and heating temperature variations of 28°C, 35°C, and 50°C. By stirring and heating the resin and catalyst solution, it is expected to achieve a more uniform viscosity, resulting in better composite material compared to methods without heating and without mixing. Based on the test results, the highest average bending strength was found in the specimen stirred with a mixer at 35°C, with a value of 359.91 MPa. The lowest average bending strength was found in the specimen with a temperature variation of 28°C, with a value of 133.7 MPa, and the bending strength at the temperature variation of 50°C was 348.81 MPa. The impact on bending strength is due to the presence of voids, which are gas or air trapped within the specimen structure. This is evidenced by micrographic analysis and density measurements, where the 28°C variation had the lowest density of 2.01 gr/cm3, while the 35°C and 50°C variations had the same density of 2.41 gr/cm3.
KARAKTERISASI PENAMBAHAN KITOSAN DAN HAP PADA PLA TERHADAP SIFAT MEKANIK KOMPOSIT Serfandi, Dina Novera; Setyarini, Putu Hadi; Purnami, Purnami; Sulistyono, Sulistyono
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.v15i3.1475

Abstract

PLA (poly lactid acid) is a biodegradable polyester that can be applied to tissue engineering because it is biocompatible and non-toxic. The purpose of this study to determine the mechanical characteristics of mixing PLA, chitosan, and Hydroxyapatite. There were 4 variations in this study, namely PLA 100 (pure PLA), PLA-chitosan-Hydroxyapatite 94-3-3 (Mix 1), PLA-chitosan-Hydroxyapatite 94-0-6 (Mix 2), PLA-chitosan-Hydroxyapatite 94-6-0 (Mix 3). The method of processing specimens is carried out by mixing the material using an extrusion machine to form filaments, then the filaments are cut to a size of 3-5 mm for injection processing with a process temperature of 170-190°C and an injection pressure of 5 Bar. The tensile strength value of the composite decreased by 0.14% from the tensile strength value of pure PLA it’s cause of the characteristic of chitosan and HAp were stiff and brittle.
KARAKTERISASI BIODEGRADASI PADA KOMPOSIT POLYMER POLYLACTID ACID (PLA) DENGAN PENAMBAHAN CHITOSAN DAN HYDROXYAPATITE Serfandi, Dina Novera; Setyarini, Putu Hadi; Purnami, Purnami; Sulistyono, Sulistyono
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1476

Abstract

Polylactid Acid (PLA) is a biodegradable polymer made from natural ingredients so it is safe to use for biomaterials. The purpose of this study was to determine the biodegradation characteristics of the addition of chitosan powder and Hydroxyapatite to PLA. There were 4 variations in this study, namely PLA 100 (pure PLA), PLA-chitosan-Hydroxyapatite 94-3-3 (Composite 1), PLA-chitosan-Hydroxyapatite 94-0-6 (Composite 2), PLA-chitosan-Hydroxyapatite 94-6-0 (Composite 3). Samples were prepared using the extrusion method to form filaments, then the filaments were injected with a temperature of 170-190°C and an injection pressure of 5-6 bar. Characterization was carried out using the Immerse Test, FTIR Test, and SEM-EDS Test. The results of the Immerse Test showed an increase in sample mass of 1.04%, 1.1%, 1.05% and 1.14% respectively. FTIR test results did not show any new functional groups in the composite. The results of the SEM test indicated the presence of Na and Cl deposits on the sample surface as evidenced by the results of the EDS test that all samples contained Na and Cl elements. So that the weight gain occurs because the three materials are not chemically mixed which easily separate and cause cavities, these cavities are filled with HBSS liquid.
PENGEMBANGAN PRODUK CASING ALAT KESEHATAN PEMANTAUAN INFUS PINTAR (MIFUS) DENGAN METODE RAPID TOOLING Media, Riona Ihsan; Kusnowo, Roni; Hendrawan, Yogi Muldani; Musa, Hafez Trimukti Ali
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1479

Abstract

MiFUS® is a tool that can display the patient's infusion condition so that nurses can monitor patients one by one in a short time simultaneously. Several nurses were involved in this study to provide input to the casing. Product design is done at the beginning to know the initial casing design. Next, the manufacture of casing molds is carried out using a 3D printing machine. The results of the 3D printer are used as a Master Mold for the implementation of Rapid Tooling method with Epoxy material. The solution of product development is catalyst ratio analysis on polyester resin to obtain the optimal ratio of properties including shrinkage and strength of the material to withstand mechanical loads. Validation of shrinkage is carried out using 3D Scanning technology to determine the deviation of dimensions in the casing made against CAD data. Meanwhile, to obtain the strength parameters of the material to withstand mechanical loads, tensile testing is carried out. The results of this study are the contribution of design parameters, namely the amount of shrinkage that occurs and the strength parameters of the material to withstand mechanical loads. The Data and information are presented in the form of product prototypes and user analysis feasibility studies.
DESIGN OF NATURAL FIBER POWDER MACHINE Latief, Alfan Ekajati; Ali, Ali; Nassem, Zidane; Ramadan, Riski Gunarto
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1482

Abstract

Natural fiber processing is the type of fiber as raw materials for textile or other industries that can be obtained directly from nature. In the Indonesian automotive industry, the manufacture of parts in vehicles is Polypropylene high impact (PPHI). An example of an existing part is a CVT slide piece made with a mixed polymer composite material from PPHI and pineapple leaf fiber. Pineapple leaf fibers with small sizes are needed so that the mixing of polymer composites is good. Therefore modern technology is required to process pineapple leaf fibers. This final project makes a natural fiber powder machine for processing natural fiber, namely scavenging. The research methodology used is a prescriptive design method. The design results produce a natural fiber powder machine (pineapple leaf fiber) for polymer composite materials with long size specifications of 420 mm long, 300 mm wide, and 582 mm high. The production capacity of the natural fiber storage machine is 5 kg/h. The source of the engine drive is a 1 HP AC electric motor with a rev of 2800 rpm. The transmission system uses a V-belt with a drive shaft 30 mm in diameter. The frame construction is made of a 35x35x5 mm profile with ST42 material and knives using S45C material (AISI 1045) with a thickness of 10 mm. It uses nine dynamic blades and six sharp plane fixed blades in a 30-degree active blade and a 60-degree fixed blade.
PEMBUATAN BETWEEN CENTRE TEST BAR MESIN BUBUT UNIVERSAL Febriani, Risky Ayu; Saksono, Novi; Candra, Addonis; Harja, Herma Budi; Fahlevi, Rivaldy Muhammad
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1483

Abstract

The inspection tool commonly used during the manufacture and acceptance testing of new machine tools or repair of old machine tools is the test bar. The test bar is a mandrel for calibration aids representing an axis to be checked within a given value, either for run-out or for location (position and orientation) in relation to other machine components. Conditions and performance on the precision of the machine will affect the products produced from the production process. Thus, the use of a test bar for the precision of a machine tool is carried out through a calibration process. At present, the need for test bars for the machine tool calibration process in Indonesia is a product imported from outside (imported), even though the manufacture of test bars allows it to be done independently. In this study, the between centre test bar was redesigned and made based on ISO 230-11 standards with the subject of examination for the straightness of the sledding movement in the horizontal and vertical planes referring to and DIN 8605. The stages of making the between-centre test bar include turning, heat treatment, cylinder grinding, and measurement. The accuracy of the geometry, such as the alignment of the diameter between-centre test bar is carried out using a CMM (Coordinate Measuring Machine) machine. Furthermore, the between-centre test bar is tested on a universal lathe to determine its feasibility through the process of checking the alignment of the spindle axis with the machine table in the vertical and horizontal directions (calibration).
PERANCANGAN SISTEM HIDROLIK PADA MESIN PRESS BAMBU LAMINASI Gumilang, Theo Satria; Krisnaputra, Radhian; Sugiyanto, Sugiyanto; Hendaryanto, Ignatius Aris; Irawati, Inggar Septhia; Bahari, Galuh
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1484

Abstract

The hydraulic system is a power transmission system by using the compressive energy of the fluid into mechanical energy to obtain a power greater than the initial power released. The press machine is one of the pieces of equipment that apply the hydraulic system. In the process of making laminated bamboo, the bamboo gluing technique is assisted using a press machine. Based on observations, the press machine used is a manual press machine, so the pressing process is not efficient. This study aims to increase the effectiveness of pressing laminated bamboo. The results of the study found that the press machine has 4 hydraulic cylinders so the pressing process can be carried out at several points simultaneously. The results of the hydraulic system analysis diagram show hydraulic cylinder moves in 16,9 seconds with a pressure of 100 bar, so the pressing process is fast. Mathematical calculations produce data, a hydraulic gear pump with a displacement of 13 cc/rev, electric motor power of 3,7 kW, hydraulic cylinder diameter of 63 mm, cylinder rod of 35 mm, rod of 400 mm, and a hydraulic tank capacity of 12 liters.

Page 78 of 97 | Total Record : 965

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