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INDONESIA
Jurnal Teknik Mesin
Published by Politeknik Negeri Padang
ISSN : 18298958     EISSN : 26555670     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Teknik Mesin adalah sebuah jurnal peer review yang didedikasikan untuk publikasi hasil penelitian yang berkualitas dalam bidang teknik mesin.
Arjuna Subject : -
Articles 204 Documents
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Analisa Tegangan pada Desain Empat Mata Potong untuk Mesin Pencacah Plastik Menggunakan Metode Elemen Hingga Hendra Hendra; Syahril Al Qirom; Sidik Susilo; Kurnia Nugraha; Hernadewita Hernadewita; Frengki Hardian
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1245

Abstract

Excessive use of plastic materials eventually causes problems related to the accumulation of plastic waste. One way to deal with plastic waste is to crush it into smaller pieces using a plastic chopper machine. The purpose of this research is to redesign the cutting blade of the crushing machine by varying the thickness of the cutting blade, the number of cutting blades of the crushing machine, and varying the cutting tooth material to get maximum stress and displacement [1-3]. From previous research it was shown that stress and deformation occurred at the number of 2 and three cutting chisel blades [1-2] and the tilt position of 4 cutting chisel blades [3]. In this research uses simulation the finite element method by a solid work design application. The thicknesses variations are 5 mm, 7 mm, and 10 mm and the number of cutting blades amounting four. The number of cutting blades used is four because of the simple design and able to carry out more cutting processes. The materials used are AISI 1045, HSS 18%, and JIS SKD 11. From the results is the recommended material thickness is 10 mm because it is able to accept less stress than 5 mm and 7 mm. The results in terms of the mechanical strength of the simulation state that all are safe to use. If it is based on mechanical strength, the recommended material is AISI 1045 coMPared to 18% HSS STEEL and JIS SKD 11. However, from economic factors, 18% HSS is a recommendation to be chosen as a cutting tooth material.
Pengembangan Sistem Pendingin Cold Box Penyimpanan Ikan Dengan Pemanfaatan Pcm Silviana Simbolon; Sigit Bagus Hakim; Marwan Marwan; Sukendar Sukendar; Yuliarman Yuliarman; Kusdi prijono; Muhammad Yunus
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1249

Abstract

One of the technologies in the refrigeration system to improve power and cost efficiency is to utilize technology to overcome this problem is to use phase change materials (PCM) to replace standard refrigerants. The purpose of this study is an attempt to reduce the operational cost of fish storage with a cold box cooling system for fish storage by utilizing PCM. The method used in this research is the experimental method. From the results of the study obtained data using a variation of 2 PCM compressor takes 219.7 minutes when mode ON for 7 hours of testing, variation 4 PCM compressor takes 202.7 minutes when mode ON for 7 hours of testing, variation 6 PCM takes 177.4 minutes when mode ON for 7 hours of testing. With this variation 6 PCMs are more optimal in helping to reduce compressor working time. The more the number of PCMs placed in the cold box can help reduce the compressor on/off cycle and the electrical energy required by the compressor is more efficient, the most efficient variation is the 6 PCM variation with a power efficiency of 15.31%. With the use of PCM can save operational costs up to 59.54% compared to using ice blocks. The design of cold boxes using PCM will benefit after 3 months of use compared to using block ice.
Modeling Mechanical Component Classification Using Support Vector Machine with A Radial Basis Function Kernel Ruzita sumiati; Moh. Chamim; Desmarita Leni; Yazmendra Rosa; Hanif Hanif
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1250

Abstract

The process of identification and classification of products in the era of modern manufacturing industries has become a crucial pillar in enhancing efficiency, productivity, and product quality. In this research, the modeling of manufacturing product classification, such as mechanical components consisting of four classes: bolts, washer, nuts, and locating pin, was conducted. The proposed model in this study is the Support Vector Machine (SVM) with Radial Basis Function (RBF). The dataset used consists of digital images of mechanical components, with each component having 400 samples, resulting in a total of 1600 samples. The dataset is divided into training and testing data, with 300 samples for each component in the training set, and 100 samples removed from the training set for external testing as model validation. The best model parameters were determined using grid search by varying the parameter values of C and γ (gamma). The model was evaluated using K=3 fold cross-validation, and external testing utilized a confusion matrix to calculate Accuracy, Precision, Recall, and F1-Score values. The research results indicate that the SVM model with the RBF kernel, using the combination of C=10 and γ=scale, achieves the best performance in classifying the four mechanical components. This is evident from the training results of the model, which were able to obtain evaluation metrics such as Accuracy of 94.17%, Precision of 0.94, Recall of 0.94, and F1-Score of 0.94. Meanwhile, the validation results with new data not present in the training dataset show that the model can achieve evaluation metrics with an Accuracy of 93%, Precision of 0.93, Recall of 0.93, and F1-Score of 0.93. These results are consistent with the training performance, indicating that the SVM model with the RBF kernel excels in classifying digital images of mechanical components, such as bolts, nuts, washer, and locating pin.
Analisis Optimasi Cetakan Briket Sistem Hidrolis Menggunakan Pendekatan Finite Element Method Elisa Sulistyorini; Ninik Martini; Dani Susanto; Maulana Cahyono
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1262

Abstract

The briquette mold is a critical component in the manufacturing process of the hydraulic briquette molding machine. Improved mold design can increase production efficiency and quality. The finite element method simulates the structural response of the briquette mold to hydraulic pressure. An accurate mathematical model is built based on material parameters, mold dimensions, and hydraulic load characteristics. The influence of mold design variables such as geometry, materials, and internal configuration can be evaluated in detail by applying FEM. Mold optimization uses a numerical optimization algorithm to find a combination of mold parameters that provides the best structural response. The main goal of mold optimization is to increase mold durability, reduce deformation, and minimize the potential for structural failure. The optimization process is integrated with FEM analysis to achieve the optimal mold solution. Improved mold design resulting from this optimization makes a positive contribution to the efficiency of hydraulic briquette production and reduces the potential for mold damage. The results of this research by optimizing the design of the length of the rod, length of the mold, height of the central protrusion of the press, and changing the diameter of the mold, we obtained simulation results that show an even distribution of loads shown in the same color. In this study, the total deformation value was 5.0298 x 10-6 mm and the equivalent elastic strain was 3.4972 x 10-10 mm
Sistem Kontrol Pneumatik pada Inlet Guide Vane Turbin Air Mikro Hidro Ainun Nidhar; Sonki Prasetya
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1291

Abstract

Indonesia has 377 MW of micro-hydro potential as an energy source for electric power generation, with the main component being water turbines. Important parameters controlled in electricity generation are generally the rotation and frequency of the turbine-generator which are regulated automatically in this case through a guide vane. This research explores the potential use of pneumatic control with an Arduino microcontroller as an alternative in regulating the Inlet Guide Valve (IGV) opening in a low-power Micro Hydro Power Plant (MHP). Hydraulic systems that are generally used in large power water turbines have constraints on maintenance costs and high processing time. By utilizing pneumatic control, this research uses Arduino to control the guide vane movement through a pneumatic cylinder. Tests were conducted with separate programs to read the turbine rotation, activate the solenoid valve, and adjust the power on the guide vane simulator. The test results show that the system successfully controls the rotation of the water turbine effectively. The conclusion of this research is that there is an inversely proportional relationship between the opening of the guide vane and the rotation of the water turbine, as well as successful control through a pneumatic system with Arduino. This research contributes to the development of low-power MHP technology with more efficient maintenance costs.
FMEA Approach in Risk Analysis of Main Engine Fuel System Maintenance: Case Study on The Express Bahari 1F I Made Aditya Nugraha; Frengky Yeremias Malelak
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1292

Abstract

The fuel system is one of the main engine support systems which is very important in the operation of the Express Bahari 1F main engine. Operation of the main engine requires special treatment of the components of the main engine to prevent failure during operation. The Failure Mode and Effect Analysis (FMEA) method is a method that can be used to identify the priority scale in maintaining a machine by evaluating the risk of failure occurring on the machine. This research uses FMEA analysis to determine the priority scale for maintenance of the Express Bahari 1F main engine fuel system. The identification results show that the injector, fuel filter and separator components are components that must be prioritized for maintenance. This type of maintenance is carried out by checking for dirty fuel which can cause the injector to operate less than optimally, cleaning deposits on the fuel filter cartridge on the fuel filter, and replacing a new separator if the separator performs poorly. It is recommended that other components be checked so that the main engine fuel system has good reliability.
Pengaruh Cairan Pendingin Terhadap Kekuatan Tarik dan Bending Pengelasan SMAW Baja SS400 Moch. Arif Wibowo; Nely Ana Mufarida; Kosjoko Kosjoko
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1321

Abstract

The welding process is widely used for joining in machine construction and steel construction. One popular welding method today is SMAW. SMAW welding is effective and practical because it only requires simple tools and electrodes in its use. According to research before, the higher the viscosity value of the coolant used, the higher the tensile strength produced by using various coolants such as aloe vera gel, banana stem extract, and water. Therefore, this research aims to use readily available coolants, especially in the production workshop environment. The purpose of this study is to determine the effect of different welding currents on the cooling liquid on the welding results of SS400 steel material. In this research, the creation and testing of specimens were conducted in several places. The creation of specimens was carried out at the Mechanical Engineering Laboratory of Muhammadiyah University of Jember, the welding process of the specimens was conducted at the Job Training Center (BLK) Situbondo, and the tensile and bending tests were conducted at the Material Testing Laboratory of the Mechanical Engineering Department at Malang State Polytechnic. This study uses SMAW welding with an E6013 Ø2.6mm electrode and SS400 steel material. After welding, the specimens were immersed in cooling liquids, namely 10% dromus, radiator coolant, and SAE 40 oil. The results of the research on the SMAW welding process for SS400 steel showed that immersion using SAE 40 oil produced the highest tensile strength at both 80A and 90A currents, which were 28.79 kg/mm² and 28.22 kg/mm², respectively. Meanwhile, the bending test results showed two different outcomes: at 80A current, immersion welding using radiator coolant produced the highest bending strength at 1067.77 kgf/mm², whereas at 90A current, immersion welding using dromus produced the highest bending strength at 1130.22 kgf/mm².
Rancang Bangun Mesin Pemotong Stik Kentang dengan Penggerak Motor Sir Anderson; Dian Wahyu; Andrianto Andrianto; Fedri Hidayat
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1362

Abstract

Potatoes are one of Indonesia's horticulture products and are among the top five global staple foods. Indonesian MSMEs still use manual manufacturing technologies to produce potato sticks. Due to limited production capacity and short production times, this business faces significant challenges. After identifying the issues, an idea emerged to create a motor-driven tool capable of cutting potato sticks. The manufacturing of potato stick-cutting tools is expected to enhance business efficiency. This potato stick-cutting machine has a capacity of 336 kg/hour, a potato shear stress of 0.006 N/mm2, a working cutting force of 132 N, and a motor power of 33.84 watts.
Studi Kasus Pengembangan Energi Surya Sebagai Stimulus Ekonomi Hijau 2045 omsar rudyanto nadeak; Leonard Leonard Lisapaly; Martua Manik; Ridwan Usman
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1372

Abstract

To face the planetary crisis, Indonesia has prioritized sustainable development through the use of green economy practices to reduce future carbon emissions. Solar energy as one of the renewable energy sources has greater value than others, but its utilisation is still small. Consideration of this condition is discussed with the aim of evaluating the progress of the green economy; finding problems; providing solutions and suggestions for Indonesia's future development. The research method uses a systematic quantitative descriptive approach based on data collected through observations, interviews and questionnaire surveys from resource persons by providing 3 leverage factors namely; funding, regulation and institutions. The study results show that the regression coefficient of the funding factor variable (X1) is 0.365 and positive, then the funding factor variable (X1) has the largest coefficient compared to the coefficient of the regulatory factor (X2) and the institutional factor (X3), so that the funding factor is the most dominant factor in measuring the performance of solar energy success towards the implementation of the green economy. Without serious support from the government in terms of funding readiness, development goals will not be achieved, due to the large amount of funds needed to support the development of the Green Economy. However, the three variables are mutually sustainable by making policies and legal foundations to fulfil the funding needs of the green economy, regulations will be the foundation in mainstreaming the implementation and funding of green economy policies. Green economy planning, governance and supervision are supported by mature institutions and funds
Pengaruh Penambahan Butanol Pada Bahan Bakar Solar Terhadap Karakteristik Pembakaran Single Droplet Brahmantyo Luqman Sayoko; Radissa Dzaky Issafira
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1383

Abstract

Dependence on fossil fuels is one of the most serious threats to the global environment. In addition, petroleum reserves are also decreasing. Meanwhile, the level of oil consumption is always increasing to meet the demand for fuel. Economical and sustainable alternative energy solutions are essential to meet the growing global energy demand without compromising environmental sustainability. One type of alternative fuel that shows very promising potential is biofuel, especially biodiesel. Biodiesel has potential as a more environmentally friendly alternative to diesel fuel, but its low combustion rate and higher viscosity compared to conventional diesel fuel present technical challenges that need to be overcome. The different chemical properties of butanol from biodiesel allow it to have a positive impact on combustion characteristics, such as viscosity, flash point, heating value, and combustion rate. The combustion characteristics that will be studied in this research using single droplet combustion testing include droplet visualization to measure the dimensions of the flame, temperature during the combustion process recorded by a thermocouple, data logger, and video recording during the combustion process to obtain information regarding the ignition delay value. The test steps were repeated five times for each fuel variation and then averaged. In this study, the samples tested included pure diesel, diesel blend with 10% butanol, diesel blend with 20% butanol, diesel blend with 30% butanol, diesel blend with 40% butanol and diesel blend with 50% butanol. From this study, the visualization of the flame is obtained, where the combustion of pure diesel oil droplets has a higher and wider flame, while the flame of the butanol diesel mixture produces a flame whose maximum height is lower than pure diesel oil. The ignition delay time of pure diesel oil is greater than the ignition delay time of the diesel butanol blend. In addition, the maximum combustion temperature produced by each blend is different

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