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Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin
Published by Universitas Bengkulu
ISSN : 25974254     EISSN : 28292855     DOI : https://doi.org/10.33369/rekayasamekanika
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Rekayasa Mekanika is scientific journal on mechanical sciences and engineering field, either pure or inter disciplinary works. This journal is a continuation of Rekayasa Mekanik which changed its name since April 2022. This journal publishes 6 articles for each issue, April and October. Starting April 2025, this journal publishes 10 articles. Authors are cordially invited to submit his/her research, review or monograph papers in English or Indonesian.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 10 Documents
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Search results for , issue "Vol. 9 No. 1 (2025): April 2025" : 10 Documents clear
ANALISIS TEKANAN HIDROLIK TERHADAP OIL LOSSES PADA MESIN PRESS KAPASITAS 15 TON Tarigan, Daniel Elieser; Zuliantoni; Bismantolo, Putra
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.38827

Abstract

In palm oil processing, there are five main stages: sterilization, threshing, digestion, pressing, and clarification. Among these, the pressing stage is one of the most critical. The pressing machine is used to separate crude oil from the fibers in the fruit pulp. This machine includes a pressing component, commonly referred to as the cone cage, which is operated by a hydraulic mechanism. The palm oil pressing process plays a crucial role in determining the success of processing fresh fruit bunches (FFB), as significant oil losses often occur during this stage. One of the key factors affecting these losses is the value of the hydraulic pressure. This study aims to investigate the effect of hydraulic pressure on oil losses in fibers for each pressing machine and to understand how the pressing machine operates. To analyze the hydraulic pressure variable and oil losses in fibers, observations were conducted by monitoring the pressure gauge on each pressing machine. The oil losses in fibers were measured through laboratory testing at the factory. The collected data were then compared. The results of this study indicate that hydraulic pressure has a significant effect on oil losses in the fibers of the pressing machine. At a hydraulic pressure of 49 bar, the smallest oil loss was recorded at 3.28%, whereas at a hydraulic pressure of 40 bar, the highest oil loss was observed at 4.42%. This demonstrates that higher hydraulic pressure results in lower oil losses, and vice versa.
DESAIN DASAR MESIN INJECTION MOLDING UNTUK PROSES CASTING SAMPEL PROPELAN PADAT MENGGUNAKAN SOFTWARE SOLIDWORKS Febriyanto, Ady; Supardi, Nurul Iman; Yulia Azatil Ismah
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.38986

Abstract

The injection molding machine for the solid propellant sample casting process is a tool for making a sample in the form of a solid propellant sample plate, this tool is designed to make work easier when carrying out the process of making solid propellant samples. The needs of the propellant industry in Indonesia are very large and important considering the need to develop solid propellant samples and munitions for the national arsenal, namely to promote and facilitate the exchange of technical information and programs. itself consists of two molds with sizes, namely 25cm diameter, 10cm high and 17cm diameter, 5cm high, frame, cember, hydraulic. The most important component in solid propellant sample injection molding is the solid propellant sample mold. Therefore, it must be strong and sturdy to hold the solid propellant sample so that it does not come out during printing with hydraulic pressure.The manufacture of solid propellant injection molding was assisted with Solidwork Software in this research.Keyword: Rocket, Propellant, injection molding.
PROSES PERLAKUAN PANAS UNTUK MELURUSKAN MATERIAL H- BEAM DENGAN METODE FIRING Ompusunggu, Ferdinand Lincoln; Puspawan, Angky; Hestiawan, Hendri
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39015

Abstract

Welded beam is a profile obtained by welding 3 sheets of plate consisting of 2 flange plates and 1 web plate formed into an I-Beam or H-Beam profile. The welding process is carried out with a special SAW welding machine and continued with a straightening process because the heat from the welding causes the welded beam profile to bend or twist. Due to the heat during welding, there is a minimum welded beam size and the minimum plate thickness cannot be straightened again during the straightening process because the melting point of the material exceeds the limit during the welding process. Firing is the process of burning material at a certain temperature with the intention of improving the dimensions of the material. The purpose of this study is to straighten H-Beam steel. In carrying out the firing process using tools and materials such as the Huawei CG1-30 machine, chalk stamps, square rulers, nitrogen and gas and K3 equipment, in carrying out the firing process, checks are carried out using a square ruler and determining the burning point on the H-Beam steel, chalk stamps are used to measure the temperature in the firing process. The firing process has The conclusion of this study is that the heat treatment process (firing) can straighten H-Beam steel using the Huawei CG1-30 machine which has a speed of 50-750 mm/minute.
PROSES PRODUKSI AMBENG STOOL HIJAU SAGE BERBAHAN DASAR PLASTIK JENIS HDPE (High-density polyethylene) DI ROBRIES (PT. Siklus Karya Global) M. Daigo Gusnanda; F. Alqap, A. Sofwan; Hestiawan, Hendri
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39286

Abstract

The manufacturing process is an activity or production process that transforms raw materials into finished goods. To accelerate production, the manufacturing process utilizes modern equipment such as machines and implements structured programs to carry out production. The purpose of this internship is to understand the procedures for making the sage green Hambeng Stool, determine the optimal plastic melting time, and identify the factors influencing product defects at Robries. Raw materials are modified through manufacturing processes to form the necessary components. To produce the desired product, several stages must be followed. In its production, the manufacturing process requires machining stages. The manufacturing process begins with designing the product and determining the material specifications for the product. The methods used in this research include literature review, observation, and interviews. This is because the desired product cannot be produced through a single machining process. The production process at ROBRIES complies with the standard operating procedures (SOP), starting with material selection, material melting, material sanding, and finishing.
DESAIN DAN PEMBUATAN HAND LOADER OUTPUT DENGAN MENGGUNAKAN SOFTWARE SOLIDWORKS Yueprayuga, Abie; Puspawan, Angky; Nuramal, Agus; Hadi Susanto, Tri Nugroho
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39474

Abstract

The design of this output hand loader aims to be a place to receive samples that have passed testing in order to improve ergonomics during the irradiation sampling process by utilizing existing materials (acrylic). The hand loader output testing method is by calculating the travel time for empty capsules and capsules containing five variations of samples when sent from the pneumatic lab to the AAN lab, and followed by testing the functional integrity of the capsules when transferred. The results show that the travel time required for the capsule to reach the hand loader is 2 seconds and the capsule is not damaged, broken or other defects. The conclusions obtained from the design of the output hand loader were the design and use of acrylic material that did not damage the capsules during testing and improved ergonomics during the sampling process compared to the previous sampling site. Apart from that, the problem when making an output hand loader lies in making bolt holes that are not parallel to other parts, which requires making new holes.
ANALISA DISTRIBUSI TEMPERATUR INTERMEDIATE TANK FASSIP-07 MENGGUNAKAN METODE COMPUTATIONALFLUID DYNAMICS (CFD) Prasetio, Dimas; Zuliantoni; Juarsa, Mulya; Ismarwanti, Sri; Kharisma, Sunandi
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39825

Abstract

This study aims to understand the temperature distribution in the natural circulation system in the Intermediate Tank FASSIP-07 using the Computational Fluid Dynamics (CFD) method. Simulations were performed using Ansys Workbench R1 2024 software, with inlet temperature variations of 70°C, 80°C, and 90°C. The results showed that the highest temperature distribution was found at the inlet with a temperature of 90°C, while the outlet reached the lowest temperature at 70°C. This conclusion was obtained from the analysis of fluid flow driven by the buoyancy phenomenon due to differences in density. This study shows the potential for using a passive cooling system for nuclear reactors to improve safety in emergency conditions.
Rancang bangun dan analisa trial and eror prosthethic servo power handa Yanalseta, Rifaldi; Suryadi, Dedi; Saputra, Roni Permana
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39847

Abstract

Prosthetic hands are designed to help people with disabilities work. This research aims to make a prosthetic hand using a 3D printing machine with a focus on using Solidworks software for model design, Ultimaker Cura software for slicing printing in the form of G-Code, and filler material in the form of PLA filament. The main components used involve a servo motor (MG996), Arduino Uno, and breadboard. This research focuses on making designs using solidworks, using servo motors (MG996), and using PLA filament material. The data collection process is divided into three stages: design creation, G-code creation, and printing, as well as the data collection process which involves trial and error on the prosthetic hand. The results of this research show that although in general all the fingers of the prosthetic hand can move, there are some fingers that experience problems following program commands. Factors such as design, manufacturing defects, hinges, and connecting straps between the servo motor and the finger affect the movement of the prosthetic hand's fingers. Although some fingers can move well, there are also those who experience difficulty in movement.
DESAIN DAN ANALISIS CASE LINFLOW WATER METER DENGAN MENGGUNAKAN METODE CAD Nuryadi, Rio Arian Syaputra; Suryadi, Dedi; Nizam, Ahmad
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.40091

Abstract

Linflow water meter is a smart technology-based water consumption meter designed to improve accuracy and efficiency in water resource management, both in the household, commercial, and industrial sectors. To protect the sensitive components inside and ensure the durability of the tool in a wide range of environmental conditions, a reliable case design is required. This study aims to design and analyze the linflow water meter casing by considering the aspects of pressure resistance, protection against moisture and temperature, as well as conducting static and thermal analysis to evaluate the structural integrity and performance of the water meter, ensuring that it meets industry standards for efficiency and durability. The methodology used includes the selection of materials that are resistant to stress and corrosion, the design of ergonomic casing structures, and durability simulations using the finite element analysis (FEA) method. The results of the analysis show that the high-quality polymer material with the addition of an anti-corrosion coating provides optimal protection for the operational environment. In addition, the modular design of the case makes it easy to install and maintain without affecting the integrity of the device. These findings are expected to improve the design process and operational reliability of water meters, thereby supporting effective drainage management and infrastructure protection.
PREVENTIVE MAINTENANCE PADA COAL PREVENTIVE MAINTENANCE PADA COAL MILL (PULVERIZER) ISMAEL , ALIF RAHMAN PELDIANSYAH; Witanto, Yovan; Helmizar
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.40176

Abstract

Coal mill (pulverizer) is used to grind coal into micro-sized particles suitable for combustion. This study aims to analyze the preventive maintenance applied to the coal pulverizer to prevent damage and improve operational efficiency. Preventive maintenance procedures include routine tasks such as visual inspection, lubrication, cleaning, and component tightening. During the process, problems such as hydraulic pipe leakage and other component malfunctions are identified and immediately addressed to prevent further impacts. Preventive maintenance has proven effective in minimizing the risk of unplanned downtime, supporting sustainable production, and improving the efficiency of the coal pulverizer. The operational principle of the pulverizer involves grinding coal between the grinding roller and the grinding table, assisted by airflow from the primary air fan to produce coal powder with a size of 200 mesh, ready for combustion in the burner. In conclusion, preventive maintenance is very important to maintain equipment performance, reduce potential damage, and ensure smooth production processes.
ANALISA KEKUATAN STRUKTUR WALKING BEAM PADA SUCKER ROD PUMP MENGGUNAKAN METODE SIMULASI NUMERIK FINITE ELEMENT ANALYSIS Nanda; Supardi, Nurul Iman; Mainil, Afdhal Kurniawan; Winata, Alben Sindhu
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.40639

Abstract

Sucker rod pump are a technology that has been used for a long time in the petroleum mining industry and proven effective in lifting oil from wells that have low flow rates. One of the companies in Indonesia which still produces Sucker Rod Pump is PT. Bukaka Engineering Utama Tbk. Sucker Rod Pump is a tool that used to raise petroleum from the well to the ground surface. In a Sucker Rod Pump there are several main components, namely the Walking Beam, Horse Head, Samson Post, Crank, Counter Weight, Pitman, Equalizer, Gear Box, electric motor and V-Belt. Walking Beam is a very component has a big influence on the performance of the Pumping Unit, in this case Walking The beam on the Pumping Unit must be appropriate in terms of strength, durability and... security, this is intended to obtain effective, maximum performance. On During the design process, the Walking Beam was designed using software solidworks 2024. The material used is ASTM A36 Steel Plate, with dimensions 5000mm long, 617mm high and 200mm wide. This Walking Beam analyzed using Solidworks 2024 Software. In the Von Misses stress test, it is obtained The maximum stress result is 76,756 MPa. While the minimum voltage found on the base plate is 0.222 Mpa. For the results of the simulation The maximum displacement value obtained is 2,550 mm for color red and a minimum displacement of 41.498 mm which is indicated by blue. Lastly, safety factor testing was carried out where the results were obtained The maximum safety factor is 1,126.43 on the base plate. Meanwhile numbers The minimum security is in the blue section, namely 0.003. From the results analysis obtained, it can be seen that the Walking Beam was used it's not safe. In the analysis process the author only uses value obtained from calculating the lifting force, object mass, well volume, and the weight of the load used (ignoring the weight of the Equlizer, Pitman, Crank, and power from the gear reducer). This is done to find out what are the conditions when the Walking Beam is operating to lift fluid from At the bottom of the well then there was a problem with the drive motor.

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