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Journal of Mechanical Science and Engineering
Published by Universitas Sriwijaya
ISSN : -     EISSN : 23549467     DOI : -
Core Subject : Engineering,
Editors receive manuscripts in Mechanical Engineering from various academics, researchers and industry practitioners. The authors in the Journal of Mechanical Science and Engineering derived from various Higher Education institutions and national research institutes. Editorial Board of Journal of Mechanical stated that online media is both a scientific and specialized publishing scientific articles on original scientific research results (original) and review the field of mechanical engineering science. Publication covering area of research and review papers are as follows but not limitted to: Thermo-Fluid, ,Energy, Machine Design, Manufacture Engineering, Materials Engineering, etc
Arjuna Subject : -
Articles 36 Documents
Design Of Spring Valve Cylinder Head Opening Tools Burlian, Firmansyah
Journal of Mechanical Science and Engineering Vol 3, No 2 (2016): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

During spring valve release process of the car cylinder head, workshops experiencing difficulties due to the released manually. The release is done by hitting the outside of the valve spring retainer which can cause damage to the valve spring retainer and also may reduce the stiffness the valve spring. It is designed tools for release spring valve on the cylinder head car. In this paper is conducted for the initial phase to design a tool, and then carried out the calculation of the force required to remove the workpiece spring valve. Tools will be made in accordance with the calculations have been done then proceed with testing tools. Once the tool has been tested, the evaluation and study of literature that will be used for the selection of materials. From the data calculation, the force required to depress the valve spring is 1942.4 N and material using the steel SC-42. Mechanism of action of the tool using a lever or a lever in order to facilitate suppression valve springs.
APPLICATION OF PRODUCT QUALITY ASSURANCE IN MANUFACTURE, CASE STUDY IN MECHANICAL ENGINEERING DEPARTMENT, SRIWIJAYA UNIVERSITY Nugrasyah, Amrillah; Mohruni, Amrifan Saladin
Journal of Mechanical Science and Engineering Vol 6, No 1 (2019): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Product Quality Assurance (PQA) is a standard procedure to ensure the product quality in practical manufacturing engineering. In this study the PQA-procedure will be applied for academic assurance in Mechanical Engineering Department, Sriwijaya University. The objective of this study is to generate web based Academic Quality Assurance (AQA) in the Department, which accomplices with National Accreditation Agency for Higher Education (BAN-PT). The development of web based AQA was carried out using an open source PHP, MySQL, CSS and REST API to ensure the web integration with the existing website of Sriwijaya University. The results show that this application can overcome the existing problems when the Academic Quality Assurance was conducted manually. The AQA web can work smoothly
The Carburizing Process of Low Carbon Steel with Charcoal Media Yahya, Yahya; Nukman, Nukman; Chandra, Hendri
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Ringkasan Proses karburisasi dilakukan untuk meningkatkan mutu kekuatas suatu baja karbon rendah dengan biaya yang rendah. Material yang digunakan adalah jenis baja karbon rendah dengan nilai karbon 0,25. Proses karburisasi pada baja karbon rendah dilakukan pada temperatur 900oC dengan holding time 90 menit menggunakan media arang tulang kambing dan tempurung kelapa. Penggunaan karburiser arang tulang kambing menghasilkan nilai kekerasannya lebih tinggi dari baja karbon dengan media arang tempurung kelapa. Hasil pengujian nilai karbon baja setelah proses karburisasi dengan tempurung kelapa adalah 0,423 sedangkan setelah proses karburisasi dengan tulang kambing nilai karbon nya hanya 1,593. Kata Kunci : Proses Karburisasi, Uji kekerasan, Uji Tarik, Uji Impak, dan struktur mikro. Abstract Carburizing process is carried out to improve the power quality of a low carbon steel with a low cost.The material used is a type of low carbon steel with a carbon value of 0.25. Carburizing process on medium carbon steel at a temperature of 900°C with a holding time of 90 minutes using goat bone and coconut shel char medial. The use of goat  bone charcoal karburiser produces higher hardness values of carbon steel with coconut shell charcoal media. Results of testing the value of carbon steel after carburizing processes with coconut shell was 0,423 whereas after carburizing process with goat bone carbon value of only 1,593 Keywords: carburizing process, hardness test, Tensile Test, Impact Test, and microstructure.
Distance Effect Between Four Elliptical Pipes With Ratio Of 0,8 On The Pressure Arround Pipes Hadjar, Astuty
Journal of Mechanical Science and Engineering Vol 4, No 1 (2017): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Tube is a component of a heat exchanger tube is usually in the form of a small circle section pipe. But do not rule out the possibility of tube using a pipe that is not circle section  for example an elliptical section  to aims pressure as small as possible, because of the pressure resistor is small, the resulting pressure drop means smaller. Pipes used are a modification AW wavin pipe with an outside diameter of 6 cm into the elliptical section pipe with a ratio of 0.8. Tests carried out in Test engine Subsonic Wind Tunnel Section 40, two pipe by measuring angles and two more be used to measure variations in the distance between the pipes. From the test results obtained by the value of the pressure difference (ΔP) and temperature (°C), the value obtained is inserted into the equation calculation in order to get the coefficient of pressure (CP) getting bigger, but the speed (U) and the pressure coefficient resistor (CDP) smaller as increasing the distance between the pipes.
Analysis of Residual Stress And Strain on The Formation of Workpiece Based Ansys 12.1 Prayogi, Sonny; ., Zulkarnain
Journal of Mechanical Science and Engineering Vol 2, No 2 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Machining process to produce plastic deformation on the workpiece. Plastic deformation during the machining process are formed by friction against the cutting tools to workpieces generate furious. During the deformation process appearance residual stress on the surface which can affect the fatigue resistance, fracture strength, and corrosion. Failure in the component structure is not only due to external forces, residual stress is an important parameter in this case. The purpose of this study to analyze the residual stresses that occur on the workpiece from turning process. In the analysis performed using the Finite Element Method (FEM) with the software to obtain the desired results by entering input data including modeling of cutting tools and the workpiece. The result is a visual overview of the residual stress in the workpiece and areas of plastically deformed as a result of feeding from the cutting tools motion. 2D visual modeling using the software Ansys 12.1 with three comparison rake angle 50, 100.150 to determine the result of the residual stress on the surface of the workpiece.
THE EFFECT OF STEERING BLADE ANGLES OF HELICAL TURBINE FOR POWER GENERATION IN IRIGATION DAM OF Sipahutar, Riman; Niharman, Niharman
Journal of Mechanical Science and Engineering Vol 2, No 1 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

The Gorlov vertical axis water turbine is suitable to harness the water flow in the creation of kinetic energy for the irigation dam. The turbine tested in this study was ther Gorlov helical turbine blade with steering angles of 00, 300, 450 and 600 turbine diameter (d) of 0.30 m, height (h) of 0.50 m and the NACA 0020 profile. The testing was conducted on the irigation dam of Seluma Bengkulu. The water flow showed in the velocity (Uair) of  0.85 m / s and a round (n) of 110 rpm. The results were achieved by setting the blades in steering torque coefficient (Ct) of 0.309 are turbine efficiency (ηt) of 28.5% and a power turbine (Pt) of 13.699 Watts.
Design of Identification System for Red and White Meranti Using Colours Detection Method Burlian, Firmansyah
Journal of Mechanical Science and Engineering Vol 3, No 1 (2016): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Development technology of computer programs caused to produce novelty from the development of these technologies. Besides to education, the development of technology can be utilized in working, even all. Digital image processing is a part the development of it. This research develop of identification system of red and white meranti by using color detection method. The program used in this research is a Matlab program. In this research, database made by 25 pieces red meranti and 25 pieces white meranti. Image of woods captured side by side using webcams. Then taking the values of primary colors RGB (red, green, blue) to be used as database. Identification system will test 5 times for every red and white meranti with different positions. Success rate of identification system red and white meranti using color detection method is 90.83%.
New Performance with Matrix Composites of Used Plastic, Fiber of Red Pinang Sheath and Bamboo Nukman, Nukman; hadi, qomarul; Fusito, Fusito
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Ringkasan Pemanfaatan plastik bekas menjadi komposit, khususnya berbahan plyproplene (PP) telah dapat dilakukan dengan cara menambahkan serat Bambu dan Pelepah Pinang Merah. Matriks PP dipanaskan dalam satu alat pemanas untuk dicairkan kemudian ditambahkan masing-masing serat alam bambu dan juga pinang merah. Hasil pengujian sifat mekanik telah dibandingkan matriks tanpa penambahan serat dengan matriks yang berserat. Pengujian menujukkan bahwa sifat mekanik dari kompisit telah meningkat dengan penambahan serat alami. Kekuatan mekanik dengan penambahan serat bambu lebih besar daripada penambahan dengan serat Pinang Merah. Kata Kunci: Polyproplene, serat Bambu, serat Pinang Merah, Komposit, Kekuatan Mekanik. Utilization of scrap plastic to composite, especially made ​​plyproplene (PP) has to be done by adding fibers and sheaths Pinang Red Bamboo. PP matrix is heated in the heater melted then added to each of the natural bamboo fiber and red nut. Mechanical properties of the test results have been compared with the fiber-matrix without the addition of a fibrous matrix. Tests showed that the mechanical properties of kompisit has increased with the addition of natural fibers. Mechanical strength with the addition of bamboo fiber is greater than the addition of the Red Pinang fiber. Keywords : polyproplene, Bamboo fiber, fiber Pinang Merah, Composite, Mechanical Strength.
THE SOLAR RENEWABLE ENERGY SYSTEM STUDY WITH A CAPACITY OF 1300 W UTILITIZING POLYCRYSTALLINE PHOTOVOLTAIC Sofijan, Armin
Journal of Mechanical Science and Engineering Vol 6, No 1 (2019): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Abstract—Solar energy is one of the alternative energy that is environmentally friendly and cheap raw materials and available throughout the year as a substitute for conventional energy whose raw materials are getting thinner and have a bad impact on the environment such as air pollution, noise and hazardous waste for the environment over a long period of time, solar energy has great potential as an independent solar power plant, which offers solutions to provide electricity to meet electricity needs, especially in areas not yet covered by the electricity grid of the National Electric Company. The 1300 W solar power plant is planned to use polycrystalline solar panels with a capacity 100 WP, combined with battery components and inverters, it can generate AC current for daily electricity needs. The greater the electrical load, the faster the battery life. This research shows that it takes 60 polycrystalline solar panels for 12 hours, 26 Solar Chargers 15 A, 9 batteries with a capacity of 150 Ah, and 15 Inverters 1300 W 
Effect of Cooling Water Fraction Of Salt in Low Carbon Steel Properties Ahmadin, Ahmadin; pratiwi, Diah kusuma
Journal of Mechanical Science and Engineering Vol 2, No 1 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Low carbon steel plate is widely used in the field of construction that require high hardness and ductility . One method used to increase the hardness of the low carbon steel plate that is by quenching water plus salt . The results showed that the quenching is based on a study of 10% salt water has a hardness of 168 VHN with σu = 33.62 , ε = 12 % and the lowest is 15 % salt water quenching VHN 101 σu = 30.30 and ε = 7.30% composition of the study above was 10 % salt solution in the cooling water will cause a decrease in mechanical properties .

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