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<![CDATA[PERANCANGAN ULANG MACHINING FIXTURE UNTUK PRODUK CYLINDER HEAD DAN COVER CRANKCASE TIPE 168 ]]>
<![CDATA[Asep Indra Komara]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 1 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i1.1367
<![CDATA[The cylinder head and crankcase cover are components of an engine produced by a manufacturing company in Tangerang. Companies need to make improvements to the production process of these components in order to compete with their competitors. The improvement of the production process is done by improving the machining process stages and re-designing the engine product fixture. Actually the company already has a fixture for the engine machining process, but the fixture cannot be used to produce engine components because it still does not function properly. The problem that occurs is the deviation of the dimensions of machining results and the ineffectiveness of the machining process thereby reducing work productivity. Therefore, it is necessary to design a new fixture that is able to answer both of these problems. Fixture design through the application of the VDI 2222 method combined with the design method according to the Handbook of Jig Fixture has resulted in a fixture design and estimated new machining process time for engine components. The fixture design is then analyzed and validated using engineering software to ensure the fixture's rigidity of the clamping force, machining force, and deflection that occur during the machining process which can have an impact on dimensional deviations. Based on the results of the study conducted, a fixture design for machining cylinder head and crankcase cover products has been produced with fixture dimensions of 450 x 459 x 1125 with a weight of 190 kg. The time needed to complete the cylinder head product is 308.67 seconds and the crankcase cover is 224.19 seconds. The maximum clamping force required is 0.36 kN. Deflection that occurs in the clamping rod is 0.0048 mm, the fixture frame is 0.029 mm and the product deformation is 0.06 mm. The fixture design is expected to be able to solve the problems that exist in the company today.]]>
<![CDATA[RANCANG BANGUN PRESS TOOL UNTUK ALAT BENDING PELAT TIPE DIE-V AIR BENDING ]]>
<![CDATA[MUHAMMAD ARSYAD SUYUTI]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 1 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i1.1396
<![CDATA[Pekerjaan pembentukan logam (metal forming) pada industri permesinan maupun pabrikasi las saat ini sangat banyak permintaan khususnya pada pekerjaan yang memerlukan proses bending. Proses bending merupakan pembentukan logam yang umumnya menggunakan lembaran pelat atau batang, baik dari bahan logam ferro maupun logam non ferro dengan cara ditekuk, yang mana dalam proses pembengkokan akan menyebabkan terjadinya pemuluran atau peregangan pada sumbu bidang netral sepanjang daerah bendingan dan menghasilkan garis bending yang lurus. Penggunaan teknologi tepat guna telah banyak digunakan untuk meningkatkan produktivitas, efisiensi, dan efektivitas dalam proses produksi pada industri permesinan maupun pabrikasi las berskala kecil dan menengah. Salah satu teknologi tepat guna yang memungkinkan diterapkan dalam proses produksi khususnya pekerjaan bending pelat yaitu mesin atau alat press bearing dengan cara menambahkan dengan press tool yang dilengkapi punch dan die penekuk. Press tool adalah salah satu jenis alat bantu pembentukan, pemotongan dan penekukan produk dari bahan dasar lembaran pelat yang operasinya menggunakan mesin press. Dari penelitian telah diciptakan press tool yang dilengkapi punch penekuk dan die berbentuk V air bending. Adapun spesifikasi press tool ini yaitu: sudut punch sama dengan 85o, radius punch sama dengan 1.5 mm, panjang punch sama dengan 300 mm, sudut die sama dengan 85o, lebar bukaan die sama dengan 33 mm, jarak langkah sama dengan 19 mm.]]>
<![CDATA[PEMANFAATAN KARBON AKTIF LIMBAH KELAPA SAWIT SEBAGAI MEDIA ALTERNATIF FILTER GAS H2S PADA BIOGAS ]]>
<![CDATA[Hegar Partogy Ambarita]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 1 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i1.1538
<![CDATA[ABSTRACT This study aims to purify biogas from impurities gas, namely H2S (hydrogen sulfide) which, if it has a high content or is not removed can cause poisoning, reduce the combustion process and can damage the machining components so that it becomes corrosive. Several studies with various purification technologies have been developed, namely the method of absorbs by using various types of absorbent. One of the absorbents used is activated carbon derived from palm oil waste, which are oil palm shells and fibers with a composition of 75% and 25% that undergo combustion processes in a boiler furnace to a temperature of 1400⁰C, the result of this combustion will produce activated carbon to be used as absorbent gas biogas impurities. This research was conducted using furification filters or can be called dry filters. This method is considered very effective for absorbing H2S gas content in biogas. To determine the effectiveness of absorption, then the addition of activated carbon to the dry filter is carried out. The experiment was carried out by spraying H2S gas through a filter media that had been made. The experimental results show the use of activated carbon in the dry filter can reduce H2S levels by 90%.]]>
<![CDATA[KINERJA PENGERING PAKAIAN DENGAN MEDIA AIR PANAS MENGGUNAKAN ALAT PENUKAR KALOR BERBAHAN TEMBAGA ]]>
<![CDATA[Yudi Setiawan]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 1 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i1.1659
<![CDATA[Abstrac Tirta Tapta Pemali Hot Spring which is one of the natural tourism assets in the village of Pemali, Pemali Regency, about 20 km from Sungailiat City. One source of energy that can be used to dry clothes in Pemali attractions is a natural hot spring, while the volume of air that comes out increases. Clothes dryer is a device / machine that functions to dry clothes with certain heat sources. This research makes clothes dryer is a model (prototype) tool / machine that uses a heat source with the same temperature as the temperature of the hot air baths. The hot water used is likened to hot air in the Tirta Tapta Pemali bath, which is around ± 40oC. Research carried out by flowing hot air into the copper pipe in the drying chamber, the heat generated will be driven by the wind from the blower to be used. Variations in this study are the flow of water of 2.4 - 3 liters / minute, 5.4 - 6 liters / minute, and 10.9 - 11.5 liters / minute. The parameters issued are how much the mass of clothing and the temperature in the drying room every 5 minutes. 7 pieces of clothing, namely 293.3 minutes with water discharge 10.9 -11.5 liters / minute with the highest average room temperature of 42.33 oC Keywords : dryer, hot water, copper]]>
<![CDATA[PENGARUH KECEPATAN TOOL PADA DISSIMILAR METAL ALUMINIUM 1100 DAN 5052 TERHADAP KUALITAS HASIL PENGELASAN DENGAN METODE LAS GESEK PUNTIR (FRICTION STIR WELDING) ]]>
<![CDATA[Irza Sukamana]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 2 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i2.1184
<![CDATA[Welding is the process of combining two or more base metals together on the contact surface with or without additives and fillers. Welding divided into two main categories namely Liquid-State Welding and Solid-State Welding. Friction Stir Welding is one of example in welding Solid-State Welding (Non-Fusion Welding). Aluminum is the most abundant metal in the earth's crust, and the third largest element after oxygen and silicon. Aluminum is a chemical element located in group 13 of period 3 with the symbol Al with atomic number 13. Aluminum is made of 66% bauxite and 33% clay. Aluminum is one of the materials that is often used as a connection raw material for welding Friction Stir Welding. Friction Stir Welding (FSW) or Las Gesek Puntir is a welding rotating process that twists the tool by using heat and vigor energy without additives until take a change delivery to the end of the base metal. Parameter of welding process done in this research that is a tool translation rate, 16 mm/minutes dan 22 mm/minutes with tool of rotations 2000 rpm using a changing spiral form indenter type. Tests conducted are, tensile testing, violent testing and chemical composition testing. The results of this research were found in the translation rate of the tool, heat treatment and welding speed greatly affect the mechanical characteristics of aluminium 1xxx series and 5xxx series that were welded. The translation rate of 22 mm / minute will increase the value of hardness and tensile strength better than the translation rate of 16 mm / minute, but it does not have a significant impact on the chemical elements in it.]]>
<![CDATA[Simulasi Numerik II : Distribusi Diameter Droplet pada Semprotan Biodiesel Kelapa, Jatropa Curcas dan Minyak Goreng Bekas dalam Ruang Bakar Mexican Hat ]]>
<![CDATA[I Gede Teddy Prananda Surya]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 2 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i2.1381
<![CDATA[Abstrak Biodiesel merupakan bahan bakar terbarukan dengan properties hampir menyerupai diesel fuel dan dapat digunakan pada motor diesel direct injection tanpa perubahan sistem bahan bakarnya. Bahan baku biodiesel yang tersedia di Indonesia antara lain kelapa, jatropa curcas dan minyak goreng bekas dapat diubah menjadi biodiesel melalui proses esterifikasi. Penelitian numerik menggunakan FLUENT 6.2 ini dilakukan pada model ruang bakar mexican hat untuk mengetahui distribusi ukuran droplet serta visualisasi semprotan dari ketiga jenis biodiesel tersebut. Pemodelan turbulen yang digunakan adalah RNG k-ε karena dapat memprediksi struktur large scale yang diproduksi oleh semprotan dan squish flow sedangkan pemodelan break-up menggunakan WAVE karena semprotan ini berlangsung dalam angka Weber yang tinggi. Hasil numerik membuktikan bahwa biodiesel minyak goreng bekas memiliki droplet berdiameter lebih besar daripada biodiesel kelapa atau jatropa curcas karena memiliki tegangan permukaan tinggi. Diameter partikel akan berkurang saat penetrasi semakin jauh karena pengaruh gaya aerodinamik yang bekerja pada droplet dan droplet tadi pecah setelah bertumbukan dengan dinding piston. Kata kunci : diameter droplet, SMD, biodiesel]]>
<![CDATA[PENGARUH PENGGUNAAN DUAL BED CATALITIC CONVERTER BERBAHAN TEMBAGA DAN KUNINGAN TERHADAP TINGKAT KEBISINGAN DAN PERFORMA MESIN ]]>
<![CDATA[Syahrul Gunawan]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 2 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i2.1436
<![CDATA[As activities increase, people increasingly need safe, comfortable and adequate means of transportation to support mobility. As a result, over the times the amount of traffic and the type of vehicles using the streets is increasing. This causes problems in the transportation sector, one of which is the problem of back pressure, temperature and noise pollution (noise) caused by vehicle exhaust. Therefore, efforts to reduce noise and back pressure from vehicle mufflers need to be done. One of them by using a dual bed catalytic converter made of copper and brass. The dual bed catalytic converter functions as a reduction of emissions while reducing noise and improving engine performance. The purpose of this study was to determine how much improved engine performance by using a copper and brass dual bed catalytic converter on a Honda Vario Techno motorcycle. The research conducted was an experimental research (experimental research). Data analysis uses quantitative descriptive method. Based on the results of the study it can be concluded that the use of a dual bed catalytic converter made from copper and on a Vario Techno 125 CC motorcycle can increase torque, power and reduce noise levels. The highest increase in torque at 16.70% catalytic brass-copper was obtained at 4000 rpm and copper-brass catalytic at 10.06% obtained at 8000 rpm rotation. The highest increase in effective brass-copper catalytic power of 2.40% was found at 3000 rpm rotation, while the highest copper catalytic copper was 3.20%. Besides the dual bed catalitic made of copper and brass converter in the exhaust Honda Vario Techno 125 CC can reduce noise levels highest on Copper-Brass catalitic of 3.08% obtained at 4000 rpm rotation and a decrease in the highest noise levels at catalitic Brass-Copper at 5.6% at 4000 rpm.]]>
<![CDATA[ANALISIS PENGARUH TEKANAN VACUUM PADA PROSES PEMBUATAN KOMPOSIT CARBON FIBER MENGGUNAKAN METODE VACUUM INFUSION ]]>
<![CDATA[Setyo Wahyu Eko Utomo]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 2 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i2.1438
<![CDATA[AbstractVacuum infusion is a method of making composite materials by using a vacuum pump to drain and spread the resin in molding. Vacuum infusion can strengthen the mechanical properties of a composite material because the manufacturing process is given a negative pressure which makes the resin or matrix permeate better than the hand lay-up method. Vacuum infusion composites can be used as the main ingredient of a vehicle body due to its strong, flexible nature in its form and manufacture so that it can be shaped as desired. This study examines the effect of vacuum pump pressure on two mechanical properties (impact and bending) of a carbon fiber composite material given an epoxy matrix. The results of this study get an increase in strength of mechanical properties with added vacuum pump pressure.Keywords : carbon fiber, composite, increase in strength, mechanical properties, Vacuum Infusion, vacuum pump pressure.]]>
<![CDATA[PENGERING BERPENUKAR KALOR DENGAN SUMBER ENERGI SEKAM PADI ]]>
<![CDATA[I Gede Bawa Susana]]>;
<![CDATA[Ida Bagus Alit]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 2 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i2.1506
<![CDATA[Drying is one way to extend the shelf life of agricultural products. The drying process can be done by using conventional methods or a dryer. Dryer could utilize solar energy and others. The disadvantage of conventional drying by using solar energy is that very dependent on weather, while dryer with other energy sources such as electricity and fuel need an additional cost. For this reason, dryer with cheaper energy sources was needed, such as the use of husk waste. In addition to cheap, husk waste was also obtained easily. This study examined the use of dryer using rice husk waste for drying chili. The tool designed consists of husk burning furnaces, heat exchanger pipes and drying cabinets. A heat exchanger pipe is intended so that dry products were not contaminated with burning husks. The results showed that material weight, water content, crushing rate and drying efficiency decreased with time. The temperature of the drying cabinet ranges from 50 to 600 C with an air flow rate of 0.49 m3 / min. this tool can reduce chili water content 85.8% to 58.2% in 900 minutes, with an average efficiency of 22%.]]>
<![CDATA[MODIFIKASI PISAU MESIN PENEPUNG ATC DENGAN GARIS MATA POTONG PADA SUDUT 33O ARAH RADIAL ]]>
<![CDATA[Nuha Desi Anggraeni]]>
<![CDATA[ Machine : Jurnal Teknik Mesin Vol 6 No 2 (2020): Machine : Jurnal Teknik Mesin ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung ]]>
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DOI: 10.33019/jm.v6i2.1623
<![CDATA[Kappa carrageenan is a hydrocolloid compound which is extracted from the red seaweed species of Eucheuma Cottonii. Kappa Carrageenan is widely used in the food processing industry as a thickener, stabilizer and emulsifier. ATC (Alkali Treated Cottonii) which is the intermediate product to obtain SRC (Semi-Refined Carrageenan) will go through further processing, such as chopping and grinding. This research is a continuation of the research undertaken to develop ATC grinding machines. This research is focused on modifying the geometry of grinding tools to obtain finer powder results than former research. The tests that have been performed show that the modifications of tool geometry provide better results, which is able to achieve fine powder up to 100 mesh. But the capacity of this grinding machine is not quite satisfactory because the amount of flour reaches 100 mesh is only 9 grams from 50 grams input.]]>
