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Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Polimesin mostly publishes studies in the core areas of mechanical engineering, such as energy conversion, machine and mechanism design, and manufacturing technology. As science and technology develop rapidly in combination with other disciplines such as electrical, Polimesin also adapts to new facts by accepting manuscripts in mechatronics. In Biomechanics, Mechanical study in musculoskeletal and bio-tissue has been widely recognized to help better life quality for disabled people and physical rehabilitation work. Such a wide range of Polimesin could be published, but it still has criteria to apply mechanical systems and principles. Exceeding the limitation has been a common reason for rejection by those outside the scope. Using chemical principles more than mechanical ones in material engineering has been a common reason for rejection after submission. Excessive exploration of the management within the discipline of Industrial Engineering in the manufacturing technology scope is also unacceptable. The sub-scope biomechanics that focuses on ergonomics and does not study movement involving applied force on the bio-tissue is also not suitable for submission.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 553 Documents
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Design and manufacturing of Welded Vacuum Testing (WVT) tool Ariyanto, Ariyanto; Fitrah, Muhammad Aqdar; salu, Salma; Amaluddin, Muh Nurul Haq; Latif, Arman; Alwi, Rahmat; Halim, Halim
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.5024

Abstract

To ensure the quality of welded joints in the hull area, welding testing is very important and must be carried out. But unfortunately, currently the quality testing process of welded joints was still limited to penetrant tests and lime tests. The purpose of this study was to obtain a portable welding testing machine that was able to obtain fairly accurate test results on hull welding defects using a vacuum system. The research method is experimental by involving data collection through field experiments, testing is carried out with the resulting weld defect research subjects and the length of testing time on 1G and 3G position welding. The results of the study by compared tests among Welded Vacuum Testing (WVT) machines, Magnetic Particle tests (MP), and Penetrant Tests (PT). The three experiments detected leaking weld defects, spark sparks, pinholes, overlaps, and undercuts. For test results with machines made, welding defects that were successfully detected were leaks in the 1G position welding workpiece and undercut in the 3G position welding workpiece. Air bubbles at a vacuum pressure of 0.2 bar are detected, meaning that there is a defect in the welded joint. This tool can be used in bilge testing.
Fabrikasi insinerator portabel untuk kebutuhan Puskesmas Zulfahmi Zulfahmi
Jurnal POLIMESIN Vol 14, No 2 (2016): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v14i2.342

Abstract

Hingga saat ini pusat pelayanan kesehatan skala menengah kebawah seperti PUSKESMAS masih ada yang membuang limbah infeksius ke TPA (Tempat Pembuangan Akhir). Hal ini disebabkan oleh ketiadaan insinerator pemusnah bahaya limbah padat medis. Insinerator dalam penelitian ini didesain portable menggunakan bahan yang mudah didapat dan murah seperti bahan drum pelumas untuk ruang bakar, tanah lempung sebagai insulator, bahan cerobong asap menggunakan pipa ST37 serta pada bagian dasar konstruksi digunakan rangkaian penumpu insinerator dari bahan pelat siku dan roda untuk memudahkan pergerakan alat . Ruang bakar primer dibuat dengan dimensi 600×500 mm, ruang bakar sekunder berdimensi 300×300 mm dan cerobong asap setinggi 1500 mm untuk mereduksi temperatur kerja. Kapasitas insinerator dalam sekali pembakaran dapat memuat limbah 12 kg pada temperatur 598 °C selama waktu pembakaran 43 menit 21 detik.Kata Kunci: Insinerator, Limbah Infeksius, Drum Pelumas
Optimization and design analysis of 2-kW induction motor shaft by using Finite Element Analysis Lambert Hotma; Nur Cholis Majid; Marsalyna Marsalyna; Fandy Septian Nugroho; Achmad Ridho Mubarak; Freddy Marpaung
Jurnal POLIMESIN Vol 21, No 4 (2023): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i4.3962

Abstract

The shaft is a very critical part of a 2-kW induction motor due to its function to support other vital components, such as the rotor, bearing, and casing. Finite Element Analysis (FEA) is used to analyze the shaft model. A meshing convergence test was conducted prior to the optimization. In which a mesh size of 0.5 mm and a tetrahedron shape are selected for the whole simulation to determine critical areas on the electric motor shaft (EMS). In this study, shaft optimization was conducted by using three manners in a sequential process, namely reducing the shaft seat for the rear bearing, modifying the step in front of the rear bearing, and then making the taper from the step in the previous process. This design modification was made to reduce the shaft mass and the maximum equivalent stress. At first optimization, namely replacing the rear bearing and its mount on the shaft, it succeeded in reducing the axle weight by 2,81%. However, the max equivalent stress increased from 30.347 MPa to 54.756 MPa which is located at the intersection of the stepped area, as well as deformation also increased from 0.002434 mm to 0.0026894 mm at the middle shaft. This drawback is overcome by changing the depth of the stepped area and creating a taper. In which the shaft mass can be reduced from 431.07 g to 408.20 g, as well as max equivalent stress is reduced from 54.756 MPa to 28.637 MPa.
Fabrikasi dan uji kinerja mesin produksi santan terintegrasi pemarutan tipe sentrifugal kapasitas 10 liter/jam Herdi Susanto; Darwin Hendri; Zakir Husin; Sulaiman Ali
Jurnal POLIMESIN Vol 18, No 2 (2020): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v18i2.1931

Abstract

The development of coconut processing technology to produce coconut milk for small and medium industry until now still uses a separate processing machine between coconut grating and coconut squeezing, so it is considered ineffective and less efficient. Therefore, previous studies aimed at improving the performance of coconut processing machines into coconut milk, have been carried out with the design of coconut milk producing machines that are integrated between the coconut grating process and the coconut milk squeezing process utilizing centrifugal force. Research aims to manufacture, a functional test of the machine components, and a calculation of the production cost per unit of the machine. The results showed that the coconut milk production machine has a power of 0.75 Kw, a maximum shaft rotation of 2850 rpm and an engine dimension of 600 x 600 x 1200 mm. The capacity of coconut milk production machines is 10 liters per hour, visual test results show that coconut milk production machines can function well at 1000 rpm, 1500 rpm, 2000 rpm and 2500 rpm. The total production cost for a unit of centrifugal coconut milk production machine with a production capacity of 10 liters per hour is Rp. 4,760,000.
Optimasi kekilapan pada pengecatan pelat St37 dengan metode respon permukaan Mahros Darsin; Halmi Palwa Guna; Mochammad Edoward Ramadhan
Jurnal POLIMESIN Vol 17, No 2 (2019): Agustus
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v17i2.938

Abstract

Pengecatan adalah proses pelapisan permukaan dengan pelapis berbentuk cair dengan tujuan untuk perlindungan dan keindahan. Untuk tujuan keindahan, salah satu tolak ukurnya adalah kekilapan yang dapat diukur dengan gloosimeter dalam satuan gloss unit (GU). Tujuan dari penelitian ini adalah untuk memeroleh nilai GU optimum dengan memvariasi parameter yang berpengaruh. Eksperimen dirancang dengan metode respon permukaan (RSM) dengan desain Box-Behnken tiga faktor dan masing-masing faktor tiga level. Faktor dan level tersebut adalah tekanan (3 bar, 4 bar dan 5 bar), diameter nozzle (1.2 mm, 1.3 mm dan 1.4 mm) dan suhu pengeringan pada oven pasca penegecatan (55 oC, 60 oC dan 65 oC). Masing-masing kombinasi parameter diulang tiga kali. Mesin cat tipe semprot digunakan dalam eksperimen ini pada material St37. Pengolahan data dengan Minitab 18 menunjukkan bahwa ketiga faktor yang berpengaruh terhadap kekilapan secara urut adalah tekanan, diameter nozzle dan suhu pengeringan. Nilai kekilapan tertinggi sebesar 50.9 GU dicapai pada kombinasi faktor tekanan 5 bar, diameter 1.3 mm dan suhu oven pengering dijaga pada 55oC. Sebaliknya dengan kombinasi tekanan 4 bar, diameter nozzle 1.3 mm dan suhu oven 65oC diperoleh kekilapan minimum serendah 22.7 GU. Analisis biaya menunjukkan bahwa biaya antara penelitian dan bengkel resmi menggunakan cat nitrocelullose memiliki selisih harga Rp. 205.908. Sedangkan perbandingan biaya dengan penggunaan cat polyurethane adalah Rp. 698.348. Dari selisih biaya dapat dilihat bahwa pelapisan dengan menggunakan cat polyurethane menghasilkan kualitas cat yang lebih baik serta nilai gloss unit lebih tinggi dibandingkan dengan penggunaan cat nitrocelullose. Jadi, semakin meningkat nilai gloss unit maka semakin banyak biaya produksi yang dibutuhkan.Kata Kunci: Pengecatan, Kekilapan, RSM, Box-Behnken, Analisis Biaya Optimization of shine in St37 plate painting  with the response surface methodAbstractPainting is a coating type by application of liquid film onto a surface. Two main purpose of painting is protection and decoration. For the later purpose, a method to quantify is by its glossiness using gloss meter in gloss unit (GU). This research purpose is to optimize glossiness by varying the factors influencing the glossy using Response Surface Methodology (RSM) with Box-Behnken design. Three factors and their variationas were: (i) pressure  (3 bar, 4 bar and 5 bar), (ii) nozzle diameter (1.2 mm, 1.3 mm and 1.4 mm) and (iii) the drying oven temperature (55 oC, 60 oC and 65 oC). The machine for painting was paint demonstrator with which using spray type on St37 material . Each combination of factor were repeated three times. Minitab 18 was employed for processing the data. The maximum glossinees of 50.9 GU was achived by using combination pressure of 5 bar, nozzle diameter of 1.3 mm and drying temperature of 55oC. While, combination of pressure of  4 bar, nozzle diameter of 1,4 mm and dryng temperatyre of 65oC resulted in the lowest glossinees of 22.7 GU. Another analysis also carried out on the cost of painting between real workshop and this research using two kind of paints. Painting using polyurethane would have different cost of Rp689,348. While when using nitrocellulose the cost difference was Rp205,908. The polyurethane paint usually used by the real workshop outweight in the glossy unit in compare to nitrocellulose which was used in this experiments.  Keywords: Coating, Gloss Units, RSM, Box-Behnken Design, Comparison of costs.
Impact of welding steel rod rotor bars on ripple mill efficiency and cost-effectiveness at Sumatera Jaya Agro Lestari Sawit Coconut Plant Lubis, Sudirman; Pane, Rafsanzani; Siregar, Irpansyah
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i6.4507

Abstract

PT. Sumatera Jaya Agro Lestari is an industry that is moving in the field of Coke Processing, some long processes that include Loading Ramp, Sterilizer,Trheser, Digester, Pressing, Clarification, and Kernel Plant stations, some problems that occur in the kernel stations mainly to Efficiency results on the Ripple Mill machine, not out of the Operation and Maintenance Standards performed by Using the achievement of the target of the Cernel by the efficiency standard of 96%, on Ripple mill machines often occur cworn outes on Stell Rod due to the input of the ripple Mill Too Over Load, and the amount of nut less mature, for that was done a study on Stel Rod that has already Worn out by performing the Rewelding Method, i.e. the addition of the meat of the steel Rod to 5 mm of the surface of the Rotor-Disc to obtain the maximum Effectiveness result. The steel rod is the most important part of the mill ripple machine consisting of stone mills that move automatically so that it will not reach the maximum efficiency result at mill mills ripple rod. With the welding method, the surface of the welded meat is applied to a steel rod with a thickness of 5mm to 7mm using the MWH 500 type electrode to form the return of the base of the new steel rods surface where the strength of the electrodes and the formation of the surface are correct. The results can be inferred from the efficiency of the impact of welding steel Rod averages 93.38% achieving a very high efficiency.
Penggunaan media benda kerja berurut pada praktek kerja pelat di jurusan teknik mesin politeknik negeri Tur mizi
Jurnal POLIMESIN Vol 7, No 1 (2009): Februari
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jp.v7i1.1350

Abstract

Banyak hambatan yang dijumpai dalam praktek kerja pelat sehingga menyebabkan terlambatnya benda kerja dikumpulkan. Kemungkinan ini disebabkan karena belum adanya media pembelajaran praktek yang tepat. Dalam tulisan ini akan dipaparkan bagaimana membuat media proses atau tahap-tahap pemotongan dan pembentukan benda kerja pada mata kuliah Praktek Teknologi Mekanik khususnya pada benda kerja pelat. Media tersebut bertujuan untuk mencegah keterlambatan dan kegagalan dalam membuat benda kerja dari hasil kerja pelat. Media akan memuat proses tahapan dalam membuat suatu benda kerja. Tahapan-tahapan tersebut adalah ukuran awal, mal, pengerjaan awal, pengerjaan akhir, dan benda yang telah jadi, Diantara nama benda kerja yang dibuat medianya adalah macam-macam sambungan, penekukan, sambungann siku, dan kotak. Media ini dipaku pada papan sehingga ukuran dan bahan media sama ukuran dan bahan benda kerja yang akan dibuat. Media ini digunakan oleh instruktur waktu menjelaskan tentang praktek yang akan dilaksanakan dan pada waktu praktek media ini tetap dapat dilihat. Dengan penggunaan media ini ternyata dapat menghasilkan pembelajaran praktek kerja pelat yang efektif dan efisien. Kegagalan yang ditemui sangat sedikit dan tugas praktek dapatdiselesaikan tepat waktu..Kata Kunci: Media, benda kerja, kerja pelat.
The Impact Of Introducing Brown Gas Into The Incoming Air Flow On The Performance Of An Internal Combustion Engine Wahyu, Mujahid; Susilo, Sugeng Hadi; Kamal, Dianta Mustofa
Jurnal Polimesin Vol 22, No 1 (2024): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i1.4575

Abstract

The increase in the number of motorized vehicles has led to challenges in maintaining environmental air quality, combustion efficiency, and the sustainability of fossil fuels. An innovative solution to address these issues is the utilization of brown gas. This study aims to investigate the impact of introducing brown gas into the incoming air flow on the performance of an internal combustion engine. The brown gas flow rate varies based on the gas production rate resulting from variations in the addition of NaOH (10 g/l, 20 g/l, and 30 g/l) to every 1 liter of water in the generator. Gas production rates are measured using a flow meter. The influence of brown gas on gasoline engine performance is assessed through power testing with a chassis dyno test engine and exhaust emissions testing with a gas analyzer. The findings reveal that the highest flow rate of brown gas is achieved with the addition of 30 g/l NaOH during the electrolysis process. Introducing brown gas into the incoming air flow can increase maximum engine power by 15.5% and reduce CO exhaust emissions by 23.37%.
Optimization of electroplating thickness results for SS400 steel using the Taguchi method Ahmad Adib Rosyadi; Firman Gustiawan; Mahros Darsin; Yuni Hermawan; Mochamad Asrofi
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.2860

Abstract

SS400 steel is steel with a low carbon content (max 0.17 %C) or low carbon steel. SS400 applications are widely used in the construction industry, railway industry, bridges and others. The use of SS400 which is in direct contact with the surrounding environment will cause the appearance, quality, and usefulness of the material or material to decrease. One way to prevent and improve metal performance is electroplating. This study used SS400 carbon steel with chrome coating. The parameters in this study are a voltage of 3, 6, and 9 Volts; the temperature of 45, 50, and 55 oC; and the time of 20, 25, and 30 minutes. The Taguchi method L9(33) was used to design the experiments. Analysis of variance (ANOVA) shows that factors of chroming time, voltage, and temperature contribute to coating thickness at the level of 40.615%; 24.951%; and 10.369%, respectively. The maximum thickness of 47.340 µm could be achieved when using combination factors of plating time of 30 minutes, at 9 Volts, and keeping the temperature of the solution at 50 oC.
Optimization of the jaloe kayoh seat design using the quality function deployment (QFD) method based on anthropometric measurements of the Acehnese Society Akram Tamlicha; Samsul Rizal; Iskandar Hasanuddin; M.M. Noor; Rahmad Ferdiansyah; Sri Rahmawati; Nazaruddin Nazaruddin
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3202

Abstract

Jaloe Kayoh is a traditional canoe used by Aceh's fishing communities to catch fish in downstream rivers and shallow waters. The current Jaloe Kayoh design does not meet ergonomic aspects, especially in the user's seat position component. It is known from the results of distributing the Nordic Body Map (NBM) questionnaire at the initial stage of the study which was distributed to 30 respondents, that 9 out of 27 fisherman's body parts were in the "very high" complaint score. This complaint is also supported by data on the user's sitting position by bending the legs to form an angle of 70°, while the ideal sitting position is with the body upright and bending the legs at an angle of 90°-135°. Because this can lead to complaints that have an impact on the risk of long-term injury such as Musculoskeletal Disorders (MSDs) so this study aims to design a seat for Jaloe Kayoh users according to anthropometric measurements to avoid the risk of long-term injury. The design of the Jaloe Kayoh stand was carried out using the anthropometric approach of Acehnese fishermen and the Quality Function Deployment (QFD) method as a reference for researchers to determine the design according to the wishes of the user. The anthropometric dimensions used in this design are popliteal height (PH), buttock-popliteal length (BPL), hip breadth (HB), backrest height (BH), elbow rest height (ERH), and shoulder breadth (SB). Data Calculation from anthropometry produces the 5th, 50th and 95th percentile measurements, which will be used in designing the seat position for Jaloe Kayoh users. The three percentile values result in a new measure of the design; PH is 39.31 cm; BPL of 48.43 cm; HB is 40.31 cm; BH is 61.37 cm; ERH of 100o; SB is 52.26 cm. So based on the QFD method produced by the house of quality, it produces a design for the Jaloe Kayoh seat position that is in accordance with what the user wants

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