Journal of Mechanical Engineering and Mechatronics
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Published By Universitas Presiden

2541-2876, 2527-6212

2021 ◽  
Vol 6 (2) ◽  
pp. 75
Author(s):  
Muhammad Dzulkifly ◽  
Raffy Frandito ◽  
Mochammad Rafli Ramadhani ◽  
Wildan Rahmawan ◽  
Farid Triawan

<p>Almost every year, floods disaster becomes the scourge of many countries in the world, including Indonesia.  When the flood comes and submerges the houses, every item and household furniture in it will also be submerged in flood water. Furniture that is heavy and difficult to move, especially electronic equipment such as refrigerators, may be left by the owner when a flood occurs. To prevent the furniture from submerging, a lifting kit is needed. For this reason, the purpose of this work is to design a mechanical tool/kit that can lift or elevate the electronic furniture such as refrigerator to a higher position and avoid the damage caused by flood. The kit is expected to be able to cover a 100 x 80 cm base of the refrigerator with maximum load of 200 kg. The elevation of the lifting kit is set to be higher than 50 cm. Calculation for the stress and fatigue analysis is also performed to determine the strength of the structure. As a result, the obtained safety factors for the critical components under static and fatigue loading conditions show values of more than one, indicating the product is safe for real operation. In addition, the required torque to produce the elevation is also calculated and discussed.</p>


2021 ◽  
Vol 6 (2) ◽  
pp. 119
Author(s):  
Nanang Ali Sutisna ◽  
Rakha Amrillah Fattah

The method of producing items through synchronously depositing material level by level, based on 3D digital models, is named Additive Manufacturing (AM) or 3D-printing. Amongs many AM methods, the Fused Deposition Modeling (FDM) technique along with PLA (Polylactic acid) material is commonly used in additive manufacturing. Until now, the mechanical properties of the AM components could not be calculated or estimated until they've been assembled and checked. In this work, a novel approach is suggested as to how the extrusion process affects the mechanical properties of the printed component to obtain how the parts can be manufactured or printed to achieve improved mechanical properties. This methodology is based on an experimental procedure in which the combination of parameters to achieve an optimal from a manufacturing experiment and its value can be determined, the results obtained show the effect of the extrusion process affects the mechanical properties.


2021 ◽  
Vol 6 (2) ◽  
pp. 95
Author(s):  
Muhammad Ramadhan

<p class="TTPAbstract">The need for sliced scallions is relatively large, so a tool that can assist in the slicing process is more effective both in terms of energy and time spent. Based on these problems, the idea was born to design a scallion slicing machine to help the community in slicing scallions, especially food sellers who need scallions such as egg martabak sellers, and food sellers.</p><p class="TTPAbstract">The method used is literature study (library), field observations, and problem-solving methods in the form of design which includes pre-planning in the form of machine sketches, machine concept planning, calculations, making working drawings, procurement of materials and components, toolmaking, assembly, and testing.</p><p class="TTPSectionHeading">The output of this final project is the manufacture of a scallion slicing machine that is simple and effective by not forgetting the safety and hygiene factors so that it can support the slicing process at the scale of traders and home industries. This tool has a capacity of 300 grams per minute using a DC 775 motor and is sourced from four 18650 li-ion batteries.</p>


2021 ◽  
Vol 6 (2) ◽  
pp. 106
Author(s):  
Ardhi Bebi Laksono

This research was taken at one of the mechanical engineering companies produces customize spare parts, special purposed machinery, automation system integrator and robotic installation. The company has problem high cost operation warehouse, need space expanding production line, stockopname problem, picking failure, high cycle time operation, logistic efficiency, and inventory cost. These problems have impact to company performance which need cost down, increase efficiency and productivity with minimum defect. The data has shown company needs additional 157m2 to expanding new line, has 4% picking defect, there is 200 million operational cost over, 150sec cycle time, 7% lost part and risk cyber data security. Due to the importance of the problem, the company needs to evaluate and solve the problem which has impact to company performance, especially in the warehouse. DMAIC (Define Measure Analyze Improve and Control) approach is applied to comprehensively explore the problem and comes out with alternatives solution. Two alternatives were developed. The criteria for selection used were i.e. cost; accuracy, security, safety, productivity, cycle time, and minimize defect It was concluded that the application of automated storage and retrieval system (ASRS) was selected as it dominates in many aspects compare to expanding the current one. This implementation of ASRS approved that this new system answers the current warehouse problem


2021 ◽  
Vol 6 (2) ◽  
pp. 88
Author(s):  
Dandun Mahesa Prabowoputra

<p>Energi listrik merupakan kebutuhan primer dalam kehidupan sehari-hari. Perkembangan teknologi mengakibatkan meningkatnya kebutuhan energi listrik setiap tahunnya. Energi baru terbarukan memasok kebutuhan energi listrik nasional sebesar 14%. Di sisi lain, pemerintah mengharapkan komposisi energi baru terbarukan sebesar 23% hingga 31% pada tahun 2050. Hal ini menunjukan bahwa energi baru terbarukan masih memiliki gap yang cukup tinggi. Penelitian ini merupakan salah satu upaya dalam pengembangan energi baru terbarukan, terutama pada pembangkit listrik mikro-pico hidro. Penelitian ini dilakukan menggunakan metode <em>Computational Fluid Dynamics</em> menggunakan Aplikasi Ansys dengan CFX <em>Solver</em>. Penelitian dilakukan untuk mengetahui pengaruh jumlah sudu pada hidro-turbin <em>cross-flow</em> terhadap performa <em>Coefficient of Power</em>. Peneltian dilakukan pada rotor dengan dimensi diameter 80 mm, panjang 130 mm dan sudut sudu 15°. Variasi jumlah sudu dilakukan pada jumlah sudu 8, 12, 16, dan 20. Simulasi dilakukan pada <em>steady state,</em> dan menggunakan tipe turbulen <em>Shear Stress Transport</em>. Turbin <em>cross-flow</em> beroperasi pada kecepatan air 3m/s dengan kecepatan sudut pada interval 50 sampai 350 RPM.  Hasil menunjukan <em>Coefficient of Power Maximum</em> yang dihasilkan untuk sudu 8,12, 16 dan 20 adalah 10,8%; 14,1%; 16,8% dan 20,1%. Dari hasil tersebut menunjukan performa maksimal dihasilkan oleh hidro-turbin tipe <em>cross-flow</em> dengan jumlah sudu rotor 20.</p>


2021 ◽  
Vol 6 (2) ◽  
pp. 64
Author(s):  
Alharisy Aji Aji
Keyword(s):  

<p><em>Saat ini di indonesia sepeda motor merupakan alat tranportasi yang sudah di produksi massal. penggunaan sparepart sepeda motor antara yang merek satu  dengan merek yang lainnya sudah umum dilakukan dikarenakan komponen tersebut terkadang sulit didapatkan di pasaran. Entah karena sparepart sepeda motor tersebut tidak lagi diproduksi oleh pabrikan atau memang ada faktor-faktor lain yang mempengaruhinya. Poros adalah salah satu komponen sepeda motor , dimana poros  merupakan salah satu bagian yang terpenting dari setiap mesin. Peranan utama sebuah poros adalah untuk mentransmisikan daya dari satu elemen mesin ke bagian elemen mesin lainnya. Daya tersebut dihasilkan oleh gaya tangensial dan momen torsi yang hasil akhirnya adalah daya tersebut akan ditransmisikan kepada elemen lain yang terhubung dengan poros tersebut. Poros roda merupakan salah satu komponen yang saangat penting dari sebuah sepeda motor karena poros berfungsi untuk menopang body, beban kendaraan itu  sendiri maupun beban luar pada kendaraan dalam hal ini manusia atau barang muatan pada sepeda motor. Sehingga di perlukan  poros yang baik untuk mencapai fungsi dari poros tersebut. Dipenelitian ini akan  membahas tentang Poros dengan beban puntir dan lentur yang bertujuan untuk memberikan pengetahuan tentang poros depan, Lebih menambah wawasan pengetahuan dalam  bidang otomotif dan Mampu merencanakan secara sistematis elemen-elemen mesin yang ada pada system kerja poros. Perhitungan Beban Luar, Perhitungan Diameter Poros, Jadi hasil dari  perhitungan poros bahwa diameter 9.9 mm aman digunakan sesuai  dengan standard,  dengan diameter poros actual dilapangan yaitu 10 mm</em></p>


2021 ◽  
Vol 6 (1) ◽  
pp. 32
Author(s):  
Nanang Ali Sutisna

<em>Universal Testing Machine or UTM (Universal Testing Machine) is a material testing machine that has more than one type of material testing. The purpose of this research is to design and analyze the strength of the UTM construction for tensile and bending tests. This machine uses a hydraulic jack as a power source to provide the required load. The design is limited to a load of 1.4 tons while the maximum construction load is 5 tons according to the hydraulic jack capacity. The method used in this study begins with a design using CAD and then analyzed with the finite element method. From the results of the analysis and evaluation, the designed tool can be used safely in accordance with the specifications used. The results showed that from the experimental results on the tensile and bending test specimens, both tests were successfully carried out. The tensile test was carried out with SUS 304 and SS400 with different thicknesses with dimensions according to ASTM E8 standards, while the bending test was carried out on ASTM A36 material with a size of 200 x 40 x 6 mm. After the test is carried out, the construction of the machine is checked for possible defects due to the test, namely the upper and lower clamps, punches and dies, and the engine frame. As a conclusion, after testing, it turns out that no damage or defects were found in all the parts examined</em>


2021 ◽  
Vol 6 (1) ◽  
pp. 11
Author(s):  
Suhar Minto

<p>Alat pengahsil asap cair ini, merupakan pengembangan dari proyek President University sebelumnya, yaitu mesin pembuat arang sekam yang diproduksi dari bahan baku sekam yang kemudian diolah dan menghasilkan briket arang yang bisa dimanfaatkan sebagai bahan bakar alternative pengganti minyak atau gas. Mesin rancangan pertama tersebut kami rasa perlu disempurnakan atau ditindaklanjuti, yaitu dari hanya mesin pembuat arang sekam sekaligus kami kembangkan sebagai pembuat asap cair. Jadi kami mengoptimalkan fungsi mesin tersebut dengan cara melakukan pengembangan dengan memanfaatkan asap hasil dari pembakaran sekam dari mesin pembuat arang sekam menjadi asap cair.</p><p>Dalam hal ini penulis fokus pada sistem pendingin mesin asap cair. Sistem pendingin memiliki peranan sangat penting dalam alat penghasil asap cair. Karena system ini akan menentukan optimalisasi dari proses pirolisis yang didalamnya ada proses kondensasi asap mencari cairan. Jadi dalam proses ini terjadi proses perpindahan panas konduksi dan konveksi. Semakin bagus system pendingin yang dirancang, diharapkan menghasilkan hasil produksi yang semakin baik karena kesempurnaan proses kondensasi di kondensor mesin asap cair.</p>


2021 ◽  
Vol 6 (1) ◽  
pp. 42
Author(s):  
Agung Sutrisno

One way of processing agricultural products is by drying process. It  is a process of reducing water content to a certain extent so that it can inhibit the rate of damage to agricultural products (rice) due to biological and chemical activities. Drying is the last step in a series of operations, and the drying product is usually ready to use. The goal of this research is to design Paddy Drier with  1000 Kg capacity.  The result of the study showing the design specification of the drier


2021 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Muhammad Rizqi Banuaji
Keyword(s):  

<p class="TTPParagraph1st">Salah satu alat yang sangatlah penting dan vital dalam sebuah kendaraan adalah rem. Rem adalah perangkat mekanis yang menghambat gerakan dengan menyerap energi dari sistem yang bergerak [1]. Rem cakram mempunyai beberapa komponen primer yaitu piringan cakram, master rem, piston, selang rem, kaliper rem, &amp; kampas rem. Rem cakram bekerja menggunakan menjepit piringan cakram yg umumnya dipasangkan dalam roda kendaraan, buat menjepit piringan cakram dipakai kaliper yg digerakkan sang piston buat mendorong sepatu rem (brake pads) ke piringan cakram. Oleh lantaran itu, perancangan &amp; perhitungan dalam sistem rem cakram sangat penting agar memenuhi kriteria yg diperlukan dan bisa mengetahui keamanan dalam sistem rem tersebut, tetapi tidak mengabaikan segi ekonomisnya. Pada paper ini kajian difokuskan pada perhitungan besar gaya yang di transmisikan pada setiap proses pengereman dan juga menghitung umur dari kampas rem cakram pada motor honda scoopy ESP FI 110cc tahun 2017. Hasil dari paper ini memperoleh gaya tangan (Ftangan ) sebesar 15,14 Kgf, gaya piston (Fpiston ) sebesar 31,81 Kgf, gaya tekan piston pada kampas (F) sebesar 203,66 Kgf(2 kampas), gaya pengereman (𝑃𝑣 ) sebesar 69,71 Kgf. Dari hasil akhir yang di dapat dari perhitungan umur kampas rem cakram motor Honda Scoopy ESP FI 110cc yaitu selama 800 jam. Jika diasumsikan pemakaian kendaraan rata-rata 3 jam perhari, maka umur kampas rem cakram bisa bertahan selama 8,8 bulan.</p>


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