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INDONESIA
Jurnal Ilmiah Teknik Mesin
Published by Universitas Lampung
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Core Subject : Engineering,
Mechanical Engineering
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Articles 66 Documents
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PENGARUH PERLAKUAN ALKALI TERHADAP KEKUATAN TARIK SERAT TANDAN KOSONG KELAPA SAWIT UNTUK DIGUNAKAN PADA KOMPOSIT SERAT TKKS Firman Gultom; Harnowo Supriadi; Shirley Savetlana
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
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Empty Palm bunches (TKKS) is one of the solid waste generated by industrial palm oil plantations which contain lots of fiber and is one of the natural fiber source that the availability of abundant in Indonesia, especially in the province of Lampung. TKKS fiber can be used as an alternative amplifier to composite materials. This research was conducted to determine the influence of the chemical composition of TKKS fiber and know the tensile strength from TKKS fiber by doing a tensile test. Alkaline treatment NaOH 5% given to fiber to separate lignin and contaminants that contained in fiber so that it can increase the tensile strength fibers. TKKS fiber is obtained processing palm oil factory by the process of boiling oil palm fresh fruit bunches with a pressure of 2.5 until 3atm at temperature 130  C during 50 – 60 minutes. TKKS already parsed and then selected and measured with a length of 6 cm and a diameter of 0.2 mm. And then given an alkaline NaOH 5%. In this research on the treatment of alkaline NaOH 5% provided that treatment during 0 hours (without treatment), 2 hour, 4 hour, 6 hour. Results from the study found that fiber tensile strength affected by the chemical composition on the fiber, the higher the tensile strength of the cellulose content is increasingly high. Tensile strength in fiber with alkali treatment 2 hours of 0,03528 Mpa, 0,3996% strain,   0,088288 MPa elasticity modulus, if compared with  fiber without alkali treatment of 0,018946 MPa tensile strength, 0,2056% strain, 0,092149 MPa elasticity modulus. This is due to the levels of cellulose fibers with alkali treatment 2 hours increased by 58,2808%, if compared with  fiber without alkali treatment by 13,2848%
PEMBUATAN SISTEM OTOMASIUNTUK PENGATURAN MEKANISME KERJA MESIN CETAK KERUPUK MENGGUNAKAN MIKROKONTROLER ATMega Aang Sukendar; . Martinus; Novri Tanti
Jurnal Ilmiah Teknik Mesin Vol 1, No 1 (2013)
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Developments in science and technology has increased very rapidly. One is the industrial field. At home industry (home industry) required a more sophisticated production system in order to maximize production. Engine control system working mechanism of crackers is an idea to create an automated system on a machine that makes in terms of operation. Has created a working mechanism controlling printing using Microcontroller ATMega 16 crackers. The system uses a microcontroller to control the relay drivers to switch on or switch off the AC motor. Optocoupler sensors and limit switches as an input to set the working mechanism of the machine automatically.The test results show that the driver relays are used to control the mechanism of action machine can work well. Similarly optocoupler sensor and AC motors as propulsion machinery.Keywords: Home industry, printing machines crackers, driver relay, optocoupler, limit switch, microcontroller.
Effect Of Slab Thickness On Weld Distortion Results In Medium Carbon Steel AISI 1045 By SMAW Method Irsyad Haryono Aulia; . Tarkono; . Zulhanif
Jurnal Ilmiah Teknik Mesin Vol 1, No 3 (2013)
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This research aimed to investigate the effect of width plate variation to distortion caused by welding in AISI 1045 light steel alloy plate. This kinds of steel is formable by heat treatment and often for making mechanical component use. Sometimes repairing mechanical component was done by welding. The deformation that occurred by welding are caused by distortion. Distortion is shape transformation proccess of welding result which caused by unbalance between expanding metal while heating and shrink while colding.This research takes places in Bureau of Work and Training (BLK) Bandar Lampung, for making the test specimen and distortion measurement, while the hardness test and microstructure test held in Material Laboratory Lampung University. Before testing the specimen, first of all the steel must be welded well, using Shielded Metal Arc Welding (SMAW) method. The electrode which used for welding is E 6013 RB 26, while the joint are V form with 80 A electric current. The welding region that will be the sample data test are base metal, HAZ, and weld metal for hardness test and microstructure test. The variation of plate width are 2, 5, 8 mm.From the result of testing materials, we can make some conclution which is, the largest distortion level experienced by plate occurred in 8 mm width of plate, while  the largest hardness number experienced by plate occurred in base metal region with 57,5 HRC number. Although, the 8 mm width of plate is the most thick of all specimen, the hardness number in HAZ refgion has the smallest number of hardness. Keywords: distortion, plate, light steel, SMAW
PENGARUH VARIASI JENIS AIR DAN KONDISI AKTIVASI DARI ADSORBEN ARANG SEKAM TERHADAP PRESTASI MESIN DAN KANDUNGAN EMISI GAS BUANG SEPEDA MOTOR KARBURATOR 4-LANGKAH Dian Eka Pratama; Herry Wardono
Jurnal Ilmiah Teknik Mesin Vol 2, No 1 (2014)
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The fuel crisis is one of the problems that faced by the world and Indonesia today. To reduce the vehicle fuel consumption, it can be done by using charcoal from rice husk pellet. This research is done with some testing that is the runs test (road test and acceleration),stationary and emission testing. Charcoal pellets are packed in a frame and placed in the air filter on the absolute revo 110 cc motorcycle.In this study, the efficient use of water in the mixture of pellet making charcoal is the best zeolite water immersion results (H12Z20),the best activation conditions at a temperature of 150 C and the activation time of 2 hours. The charcoal pellets can save fuel by 15.72% on road test, and making the accelerate for 7.02% and save fuel consumption until 18.55% on a stationary test. Rice husk pellets are also proven to reduce vehicle exhaust emissions. it can reduce levels of CO and HC by 85,71% at 37,45%  as well as increasing levels of CO  by 6,70%.Keywords : performance, rice hulk charcoal pellets, charcoal adsorbent pellets, exhaust emissions.
PENGARUH UKURAN BUTIR SERBUK FLY ASH TERHADAP KEKUATAN IMPACT BAHAN KOMPOSIT BERMATRIKS EPOXY Agus Setiawan; Shirley Savetlana; Gusri Akhyar Ibrahim
Jurnal Ilmiah Teknik Mesin Vol 1, No 4 (2013)
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Mixing types of epoxy polymers with fly ash (fly ash) coal into composite materials is expected to be one of the ways to look for an alternative to metal materials. Mixing two different materials is intended to improve the mechanical properties of composites by utilizing waste coal as a reinforcing material. Making specimens was based on differences in particle size of the fly ash powder. Fly ash sifted with a sieve to obtain a variation of the size of the fly ash particles with a size of 40 mesh, 80 mesh and 120 mesh. While the epoxy resin used was a general purpose type (Bisphenol Aepichlorohydrin) Bakelite EPR 174 with a ratio between the epoxy resin and hardener 1:1. After getting the fly ash according to the desired size, made by mixing epoxy resin through the calculation of the mass fraction. The process of mixing epoxy resin with coal fly ash waste is done with matrix mixing ratio by 60% and 40% fly ash. Then do the impact test for pure epoxy resin and for composites. Fracture area photo by scanning electron microscope (SEM) was used to analyze the causes of failure in composites. Testing was conducted ann accordance with the standard impact test ASTM D 6110. The test results showed the addition of fly ash particles with increasing particle size of 40 mesh, 80 mesh and 120 mesh can improve the impact strength of the composite. Highest impact strength of the composite obtained at 120 mesh particle size of 3.967 x 10-3 J/mm2. With the decrease in the size of particles, extensive contact between the surface of fly ash with resin will be many more. So, to the improve impact strength. In the SEM image results look excellent interface bonding between the matrix with fly ash particles. In the composite looks much voids or porosity.Keywords: epoxy, composites, fly ash, impact test, SEM photos, the mechanical properties.
Pembuatan Sistem Otomasi Dispenser Menggunakan Mikrokontroler Arduino Mega 2560 Imran Oktariawan; . Martinus; . Sugiyanto
Jurnal Ilmiah Teknik Mesin Vol 1, No 2 (2013): Jurnal FEMA Vo.1 No.2 Tanggal 10 April 2013
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Developments in science and technology in this era is an important factor and can not be separated in an attempt to improve the welfare of the community. This is proved by its increasement of peoples demand for tools that can work automatically, efficiently and saving energy. One of automation technologies that can be applied in home appliances is a dispenser that uses automation.Dispenser which used in this study using a microcontroller Ardunio Mega 2560, because the microcontroller can reduce the complexity of electronic circuits and instrumentation. The microcontroller pin is used as an input and 10 PIN 2 PIN as output. Meanwhile, in the manufacturing process of hardware includes five series are: power supply circuit, sensor circuit height glass, circuit microcontroller arduino mega 2560, Soil moisture sensor connection, relay driver circuit. While data that obtained are the water level, the presence sensor cups, and level glass.Automation system Arduino Mega 2560 microcontroller running well as the dispenser system mechanism. Resulting in a dispenser that can provide comfort for people, particularly in meeting the needs of drinking.Keywords : microcontrollers, Arduino Mega, Soil moisture sensor, Driver delay
Aplikasi Cairan Pelumas Untuk Mengurangi Tingkat Keausan Mata Bor Pada Pengeboran Pelat ASTM A1011 Menggunakan Mata Bor HSS Anjar Tri Gunadi; Gusri Akhyar Ibrahim; Arinal Hamni
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
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Seiring dengan perkembangan serta kemajuan ilmu pengetahuan dan teknologi, mengakibatkan berkembangnya pula bidang-bidang kegiatan manusia. Salah satunya adalah berkembangnya bidang industri permesinan. Proses permesinan yang dilakukan secara terus menerus misalnya pada pengeboran akan menyebabkan aus nya mata bor yang digunakan, karena adanya peningkatan suhu pemesinan. Perlu adanya perlakuan khusus untuk menurunkan suhu pemesinan yang terjadi. Penggunaan beberapa jenis cairan pendingin seperti oli sintetis dan minyak kelapa diharapkan dapat menurunkan suhu permesinan sehingga mengurangi keausan yang terjadi pada mata bor HSS yang digunakan. Diaplikasikan dengan cara menyemprotkan cairan pelumas secara terus-menerus pada permukaan benda kerja yang bersinggungan dengan mata bor pada kecepatan putaran (n) konstan pada 443 rpm, sedangkan variasi pada gerak makan (f) sebesar  0.1 mm/rev, 0.18 mm/rev serta 0.24 mm/rev. Umur pakai mata bor yang didapat pada pengujian tanpa pelumas dengan putaran (n) = 443, gerak makan (f) = 0.1 mm/rev serta nilai keausan mata bor    (vb) = 0.3 mm adalah 2.02 menit. Untuk penggunaan oli sintetis dengan kecepatan putaran dan gerak makan yang sama, didapat umur pakai mata bor selama 4.71 menit atau meningkat sebesar 54%. Peningkatan itu dibandingkan pada proses pengeboran tanpa menggunakan cairan pelumas. Sedangkan dengan penggunaan minyak kelapa, umur pakai mata bor selama 4.05 menit atau meningkat  sebesar 48%. Dengan demikian nampak jelas bahwa penggunaan cairan pelumas mampu menurunkan tingkat keausan mata bor, terutama pada penggunaan oi sintetis. Kata Kunci : keausan mata bor HSS, gerak makan, cairan pelumas.
PERANCANGAN ALAT UJI GESEKAN ALIRAN DI DALAM SALURAN Jhon Fitter Siregar; Jorfri B Sinaga
Jurnal Ilmiah Teknik Mesin Vol 1, No 1 (2013)
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Mechanical Engineering Department, University of Lampung has been established since 1998 and implementation of the learning process at this Department supported by ten laboratories. One of these laboratory is laboratory of Mechanical fundamental phenomena. But testing equipment available until now in this laboratory is still lacking. In this paper is given, design an analysis of test result of friction flow in channel testing equipment, with channels used are: circle, triangel, square with hydraulic diameter of Dh . Results of testing equipment show relationship between friction factor f and Reynolds number close to the graph on Moody diagram in the textbook of fluid mechanics. That means, this friction flow in channel testing equipment can be used to support laboratory work of mechanical fundamental phenomena in the Mechanical Department Engineering, University of Lampung.Keywords: Design, friction factor, laboratory work, mechanical fundamental phenomena.
PERENCANAAN PROSES TUNGKU PENGERING KOTORAN HEWAN TERNAK Cholyan Perwira; Yanuar Burhanuddin; Ahmad Yahya TP
Jurnal Ilmiah Teknik Mesin Vol 2, No 1 (2014)
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Most welding shops in the area Pringsewu District in carrying out the work are still using a system  that is not working or is not systematically planned, which is why most welding shops suffered many losses, such as product processing time is longer, the cost of production incurred greater and workmanship unsatisfactory. Of the shortcomings and weaknesses of the system working in most welding shops in the Pringsewu District, it is necessary to study the process planning , which is applied in the manufacture of livestock manure dryer furnace in the manufacturing  process in a small welding shop. This study aims to make a good process planning that can be applied to the world of entrepreneurship, especially welding shop. The research was conducted at the welding shop at Pringsewu district in January-March 2013. Making the process planning begins with the creation of images 2dimensional furnace consists of 4 major components, namely cones, combustion chamber, body coatings, and disposal space. Procedures sheets gained as much as 11 pieces that serve to minimize material and wasted time . Calculation time of making the furnace obtained through primary and secondary data collection  that results in two sketches workplace assembling component parts, 41 pieces of the map left and right hand and 8 pieces of the process flow map. The resulting time using MOST (Mynard Operation Sguence Technique) is equal to 57.8757 hours divided by 8 hours of working time in 1 day = 7.2344625 days or ± 8 days. The total estimated cost of production based on direct costs, indirect costs, and overhead costs for Rp.8.345.300Keywords : Process planning, Furnace, Procedures sheet, MOST
PERILAKU CREEP PADA KOMPOSIT POLYESTER YUKALAC 157 BQTN-EX DENGAN FILLER SERAT GELAS Dodi Marlin; . Sugiyanto; . Zulhanif
Jurnal Ilmiah Teknik Mesin Vol 1, No 1 (2013)
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Research aims to investigate the creep behavior of the composite which made from polyester resin with fiberglass filler. Composites are composed from fiber glass with pararel oriented, then the composition of the fiber volume to matrix are vary at 5%: 95%, 10%: 90%, and 15%: 85%.Composite then casted based on dimensions listed in ASTM D2990. Composites tested with the tensile test to determine the tensile strength of the composite. The test is continue with creep testing by providing creep load on the testing 60% of the tensile strength. In order to know the mechanism of failure in the plane of composite fracture, SEM is used to observing it. The test result showed that the composite with the volume composition of the fiber versus matrix : 15 %: 85%, has the longest time of all variations although just only 1000 seconds.The low creep time due to presence of voids in the composite matrix, fiber breaking, pull out, debonding at the fiber and also the influence of loading during creep testing are not uniform.With a maximum creep only 1000 seconds, the composite results of this study are not feasible to be applied in both the shipping industry andautomotive.Keywords: polymer composite, Polyester, Fiber glass, creep behaviour

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