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ROTOR: JURNAL ILMIAH TEKNIK MESIN
Published by Universitas Jember
ISSN : 1979018x     EISSN : 24600385     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
ROTOR merupakan jurnal yang diterbitkan oleh Jurusan Teknik Mesin Universitas Jember yang memuat artikel ilmiah dalam bidang Konversi Energi, Design/Perancangan, Teknik Produksi, Material serta bidang lain yang terkait dengan Teknik Mesin. Semua naskah yang diterima ROTOR diterbitkan secara global dalam bentuk elektronik. Hasil penelitian yang diterbitkan dalam jurnal ini diharapkan dapat menambah khasanah pengetahuan di bidang Teknik Mesin serta menjadikan sarana bagi para profesional baik dari dunia usaha, pendidikan, ataupun peneliti untuk menyebarluaskan perkembangan ilmu pengetahuan dan teknologi di bidang Teknik Mesin melalui publikasi hasil penelitian.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 327 Documents
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PEMILIHAN PISAU POTONG MESIN PERAJANG LIMBAH PLASTIK DENGAN METODE QUALITY FUNCTION DEPLOYMENT (QFD) DAN VALUE ENGINEERING (VE) SEBAGAI ALTERNATIF PENINGKATAN TARAF HIDUP Widjanarko, Widjanarko
ROTOR Vol 8, No 1 (2015)
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Abstract

The problem of waste plastics (especially bottled water brand) and relatively low economic community have a significant impact on the life of the country, and also feared that would contaminate the plastic debris environment, it would seem that negative behavior due to low economic level such as theft, robbery, forgery, trafficking in children, malnutrition, and others.This study aims to identify the scavenger desire in relation to the increase in value of mineral water plastic packaging waste to improve their living standards by the method of Quality Function Deployment (QFD). Method of Value Engineering (VE) was used to obtain the basic functions (primary function) in realizing the desire scavengers who have the technical requirements. Scavengers desire in the plastic processing waste in this study is able to process the waste plastic in a way that is cheap and efficient. Technical terms on the plastic waste crusher machine developed is about, install and step off, engine capacity, number of components, standard tools, power machines, knife cut, the price of the machine. The knife cut to plastic waste crusher machine there are three options, which made a total of high carbon steel (most expensive), high carbon steel that was inserted on the low carbon steel holder (medium), and a high carbon steel electrode welded on low carbon steel holder (least expensive). The results of 30 scavenger in the city of Malang is the scavenger desire of low-cost machines (83.33%) and the machine capacity is not too large (73.33%). From the percentage of the two wishes are then carried out the product development of plastic waste crusher machine in the price of Rp 3.9 million, crushed capacity of 10 kg / hour.
Identifikasi Delaminasi Batang Komposit Rami dengan Metoda Respon Frekuensi Muh, Yamin; Heru, S.B., Rochardjo; Suyitno, Suyitno; I Made, Miasa
ROTOR Vol 8, No 1 (2015)
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Abstract

Identification of delamination composite beam for four layers by using piezoelectric sensors.  Damage index is based delamination area (cross-sectional area ratio of delamination of the beam cross-sectional area). The purpose of research is to determine the location and cross-sectional area of delamination in composite materials beam four layers. Test bean   varied in five variations of fiber orientation;  [002]s , [4502]s , [9002]s , [±450]s dan [00/900]s,  five variations defect distance from the tip of the beam; 50, 100, 150, 200 and 250 mm, five variations of the damage index; 0:17, 0:22, 0:25, 0:28 and 0:33. Testing method used by the impulse frequency response method. Impulse testing in accordance with ASTM E 756. The results showed the natural frequency of the composite beam influenced by the orientation of the fiber direction, the distance from the tip of the beam defects and damage index.
Perhitungan Energi Kinetik Pada Sistem Pengereman Regenerative Mobil Listrik Hardianto, Triwahju; Sutjahjono, Hari; Ramadhan, M. Edoward
ROTOR Vol 8, No 1 (2015)
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Abstract

This research is early step of the research developing on regenerative breaking system of Jember University electric car. This research focuses on the energy recovery system application using kinetic energy on electrical while do breaking. Application of KERS (Kinetic Energy Recovery System) is expected to improve the performance of electrical energy storage systems and increase the mileage of electric cars with regenerative system on the battery charging system.The regenerative braking system in this research is to create a prototype system that consists of three main components namely CVT (continuously variable transmission), flywheel and clutch. Data obtained on the experimental results showed that the relationship parameters i.e. car wheel speed, the flywheel speed and duration of the flywheel during braking. At one of the results of data is obtained wheel speed data of 680 rpm, speed flywheel of 128 rpm with duration of flywheel rotation after braking of 21.42 seconds.
OPTIMASI DESAIN MOLD UNTUK MEREDUKSI CACAT FLASH DAN SHRINKAGE PADA PRODUK PAKU KOTAK DENGAN MENGGUNAKAN SOFTWARE SIMULASI MOLDFLOW (STUDI KASUS PADA PT. PRIMA SAKTI) Ayu W., Erfina; Arbiantara, Hari
ROTOR Vol 8, No 1 (2015)
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Abstract

Use of plastic is rapidly increasing, but in injection molding products common product defects, such cracks, shrinkage, unperfect shape, overtopping plastic material, dimensions of product outside specified tolerance and  forth are caused by several factors. The most important factors are mold design. PT. Prima Sakti is injection molding company that produced products rectangle nail that has defects, especially flash and shrinkage, which would harm company. In this study, the authors make analysis to reduce defects in trectangle nail by polypropylene using moldflow simulation software, by varying placement of  gate and diameter of  cooling in mold. The aims are obtaining parameter settings of cylinder temperature, injection pressure, eficient and optimum cooling for rectangle nail, and also obtaining mold that produce  smallest percentage of defect. The test is conducted by varying temperature cylinder 230˚C, 240˚C, 241,1˚C, and 250˚C, and varying injection pressure of 60 MPa, 69.134 MPa, 98.56 MPa and 128 MPa, which aims to determine ratio of shrinkage and fill time. Result that obtained in this study that for rectangle nail product, the best output obtained in design 2 simulation with cylinder temperature 230˚C, injection pressure 60 Mpa and 98,56 Mpa, that obtain shrinkage ratio 15,68% with fill time 0,38 second.
PENGARUH VARIASI KONSENTRASI INHIBITOR EKSTRAK KULIT BUAH KAKAO TERHADAP LAJU KOROSI PIPA BAJA KARBON A53 PADA MEDIA AIR LAUT Purnomo, Adi; Sumarji, Sumarji
ROTOR Vol 8, No 1 (2015)
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Abstract

Corrosion is a chemical phenomenon that occurs in metal materials in a wide variety of environmental conditions. always good corrosion causing losses losses that are directly or indirectly impacted. one way of corrosion prevention is the addition of corrosion inhibitors. Corrosion inhibitor is a substance that is added to the medium to prevent or reduce the rate of corrosion of metals in the environment . In this study , the authors make use of a corrosion inhibitor cocoa peel extract from the rind of the results of maceration with the variation of the cocoa peel extract concentration was 0 ppm , 500 ppm , 1000 ppm , 1500 ppm and 2000 ppm in sea water media using specimens of carbon steel pipe A53,The purpose of this study was to determine the effect of variations in the concentration of cocoa peel extract against corrosion rate and efficiency of inhibitors that occur in the carbon steel pipe A53 and analysis form macroscopic and microscopic corrosion that occurs in the specimen by using a camera and test equipment microscope with 200x magnification. From the results of this study concluded that there are significant variations in the concentration of the tea leaf extract against corrosion rate of carbon steel pipe A53. At 2000 ppm concentration variation, occurred average value of the lowest rate of corrosion inhibitor that is 0,2384 mdd and highest efficiency 83.37 %.
STUDI PERBANDINGAN REGULATOR KONVENSIONALDUA RELAY DAN REGULATOR ELEKTRONIKBERBASIS MIKROKONTROLERAVR ATMEGA8 Wijayanti, Erma; Rubiono, Gatut; Mujianto, Haris
ROTOR Vol 8, No 1 (2015)
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Abstract

Automotive charging system provide vehicle’s electricity consumption and battery charging. Common regulator has unstable voltage output. This research is aimed to compare the performance of common and electronic regulator. Electronic regulator designed with an AVR ATMega8 microcontroller and 16 x 2 matrix LCD. The devices are tested in the charging system of Toyota Kijang 5K automotive engine by measuring alternator voltage output using voltmeter. The engine is running at 1000, 1500, 2000, 2500 and 3000 rpm. The measurements are taken three times for 300 seconds with 30 second interval. The result shows that the average voltage output of electronic regulator increase faster at 0 until 30 second measurement period. The result also shows that electronic regulator has more stable voltage output which is 14,45 Volt. The overall comparison study shows that electronic regulator has better performance than common regulator.
PENGARUH VARIASI WAKTU DAN SUHU TERHADAP KEKUATAN TARIK BELT CONVEYOR (2-PLY 1-STEP) PADA PENYAMBUNGAN SISTEM PANAS Nurman, Ahmad Amril; Syuhri, Ahmad
ROTOR Vol 8, No 1 (2015)
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Abstract

Industry of manufacture continued to increase in line with developments in science and technology. Using belt conveyor to transport materials can’t be separated in the industrial world. One of the problems that often occur in conveyor belt is a belt tear or break in the connection. This study aims to determine the best tensile strength in the process of joining belt with hot splicing method, by varying the times (20, 30, 40 minutes) and heating temperature (100, 150, 170 oC) in the process of these connections. The results showed that the best tensile strength is obtained at a temperature of 130 oC and a time of 40 minutes, that is equal to 0.638 MPa.
FABRIKASI SERAT NANO BERBASIS POLIMER MENGGUNAKAN TEKNOLOGI ELECTROSPINNING Hentihu, M. Fahrur Rozy; Sholahuddin, Imam
ROTOR Vol 8, No 1 (2015)
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Abstract

Nano fibers can be fabricated using electrospinning technology using local components at low cost. Electrospinning technology also has advantages to control the morphology, uniformity, porosity and composition of nano fiber by pumping a solution of the gel through the nozzle of a metal-needle high voltage electrified. Based on the results of the research, the general parameters required for the manufacture of electrospinning machine is a resolution rate of spraying the solution (μℓ / min) and the magnitude of the high voltage power source (kV). A human hair is approximately 60 μm size looks larger than the size of the resulting PVA fiber electrospinning machine. These results were confirmed by the results of fiber characterization using the AFM in the area of ​​fiber 50 μm x 50 μm, fiber size in the range of <1 μm are included in the order of 1000 nm. It can be concluded that the electrospinning machine that has been made in this study has been able to create nanometer-scale fibers.
FABRIKASI DAN KARAKTERISASI NANOGENERATOR BERBASIS NANOFIBER-NANOWIRE ZnO Sholahuddin, Imam; Hentihu, M. Fahrur Rozy
ROTOR Vol 8, No 1 (2015)
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Abstract

Fiber diffusion process when the fiber is still green on a plate collector and the thermal decomposition process followed by the formation of ZnO crystal nucleation has a very large role of the morphology of the final form of fiber products. Conversely, a positive result occurs in nanowire growth process. At the time of natural air pressure conditions and the presence of oxygen in the air in the process of sintering for 2 hours without using a catalyst, ZnO crystals can grow by itself (self-growth) into a nanowire. As a material nanogenerator, this situation provides an additional active area to excite the tap-off force into electrical voltage of up to 234.55 mV (2 μℓ / min).
PENGARUH VARIASI KONSENTRASI INHIBITOR EKSTRAK KULIT BUAH KAKAO TERHADAP LAJU KOROSI PIPA BAJA KARBON A53 PADA MEDIA AIR LAUT Purnomo, Adi; Sumarji, Sumarji
ROTOR Vol 8, No 1 (2015)
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (320.347 KB)

Abstract

Corrosion is a chemical phenomenon that occurs in metal materials in a wide variety of environmental conditions. always good corrosion causing losses losses that are directly or indirectly impacted. one way of corrosion prevention is the addition of corrosion inhibitors. Corrosion inhibitor is a substance that is added to the medium to prevent or reduce the rate of corrosion of metals in the environment . In this study , the authors make use of a corrosion inhibitor cocoa peel extract from the rind of the results of maceration with the variation of the cocoa peel extract concentration was 0 ppm , 500 ppm , 1000 ppm , 1500 ppm and 2000 ppm in sea water media using specimens of carbon steel pipe A53,The purpose of this study was to determine the effect of variations in the concentration of cocoa peel extract against corrosion rate and efficiency of inhibitors that occur in the carbon steel pipe A53 and analysis form macroscopic and microscopic corrosion that occurs in the specimen by using a camera and test equipment microscope with 200x magnification. From the results of this study concluded that there are significant variations in the concentration of the tea leaf extract against corrosion rate of carbon steel pipe A53. At 2000 ppm concentration variation, occurred average value of the lowest rate of corrosion inhibitor that is 0,2384 mdd and highest efficiency 83.37 %.

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