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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 333 Documents
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THE EFFECT OF DEPOSITION TIME OF He-CH4TOSURFACE ROUGHNESS ON AISI 410 STEEL SURFACE Wahyu Anhar; Viktor Malau; Tjipto Sujitno
ROTOR Vol 9 No 1 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (136.812 KB)

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh waktu pendeposisian He-CH4(helium-metana) pada permukaan baja AISI 410 terhadap angka kekasaran permukaan. Proses pendeposisian He-CH4 dapat dilakukan dengan plasma chemical vapor deposition (plasma CVD). Campuran gas He-CH4 dideposisikan di permukaan baja AISI 410 menggunakan temperatur 300 °C dan tekanan 2 mbar. Variasi waktu pendeposisian yaitu 1, 2, 3, 4, dan 5 jam. Perbandingan campuran gas He-CH4 adalah 76% He dan 24% CH4. Pengujian angka kekasaran permukaan menggunakan instrumen pengukur kekasaran permukaan Surfcom 120A. Berdasarkan hasil pengujian angka kekasaran permukaan didapatkan bahwa terjadi peningkatan angka kekasaran permukaan diawal pendeposisian. Angka kekasaran raw material sebesar 0,04 μm meningkat menjadi 0,1 μm setelah 2 jam pendeposisian. Penambahan waktu pendeposisian setelah melewati 4 jam menurunkan angka kekasaran menjadi 0,05 μm. Penambahan waktu pendeposisian menyebabkan permukaan lapisan menjadi halus dan rata.
OPTIMASI WAKTU SIKLUS PRODUKSI KEMASAN PRODUK 50 ML PADA PROSES BLOW MOULDING DENGAN METODE RESPON PERMUKAAN M. Kahlil Gibran; F.X. Kristianta
ROTOR Vol 9 No 1 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

50 ml bottle is being processed by blow molding. There are many parameters that influence cycle time during production; This study aims to determine the influence of process variables, ie blowing time, blowing pressure and stop time of the response variable, namely the cycle time, the net and volume. In addition, to get the value for the optimization of the production cycle time 50 ml bottle while maintaining the value of quality in the bottle, ie the net value and volume. Each parameter is determined three chosen level. Middle level is taken from standard setting of machining which is being used by industry. Top and bottom level is randomized. Three stopping time are 0.5, 1.0, and 1.5 second. Blowing time are 8, 9 and 10 second. Where as, blowing pressures 5, 5.75 and 6.5 bar. Combination of among levels is based on Box Behnken design. Those three parameters are called variable process. In the other hand, variable responses are cycle time, netto and volume. Each combination is replicated 3 times and then averaged. The data then is processed by using Minitab version 16th. Square regression of the model for cycle time is ŶCT = 13,5300 – 0,0412 X1 + 0,8000 X2 + 0,1812 X3 + 0,0238 X12 – 0,2087 X22 –0,0412 X32 – 0,1150 X1 X2 – 0,0175 X1 X3 +  0,0350 X2 X3. Where X1 is blowing pressure, X2 is blowing time and X3 is stop time.The model developed then tested by residual assumption. Second stage of model testing lack of fit test. Optimization of both values, cycle time, netto and volume are searched by Response Surface Method. By the method it is found that the optimum condition of cycle time is 12.60 seconds, netto is 13.34 grams, volume is 89.87 ml The optimum condition is achieved when stop time is 1.5 second, blowing time 8 second and blowing pressure 5.34254 bars.
KARAKTERISTIK API SYNGAS PADA GASIFIKASI DOWNDRAFT DENGAN BAHAN BIOMASSA SEKAM PADI Nasrul Ilminnafik; Frenico A.O.
ROTOR Vol 9 No 1 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

Telah dilakukan penelitian tentang karakteristik api pada gasifikasi dengan  reaktor tipe downdraft menggunakan biomassa  sekam padi. Penelitian ini  menggunakan variasi air fuel ratio (AFR) sebesar 1.08, 1.35, 1.62, 1.90 untuk mengetahui temperatur dan warna api. Hasil dari penelitian menunjukkan bahwa kualitas syngas yang baik ditunjukkan dengan api yang bewarna biru. Proses gasifikasi  optimal pada suplai udara sebesar  1,0 m/s yang ditunjukkan oleh cepatnya api mencapai warna biru 100 % dan temperatur api tertinggi mencapai 675°C . Semakin jauh dari nilai AFR optimal, kualitas syngas akan semakin menurun yang ditunjukkan oleh menurunnya temperatur api dan prosentase warna api biru. Temperatur dan warna api bisa digunakan sebagai parameter yang menunjukkan kualitas syngas.
SIFAT MEKANIK DAN STRUKTUR MIKRO SAMBUNGAN LAS ALUMINIUM 6061 HASIL FRICTION WELDING Hendry Wicaksana; Santoso Mulyadi; Ahmad Syuhri
ROTOR Vol 9 No 1 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

The study of the interface mechanical strength of metal alloy friction welded is essential for increasing of the quality of bonding between two materials. In the present study the material is 6061 aluminium alloy and the variation are friction time and chamfer angle. The purpose is to increase the mechanical strength of aluminium 6061 friction welded by combining friction time parameter and chamfer angle. The friction time variations were 60 and 120 second. Whereas the chamfer angles were 0o, 30o, 60o. The joined aluminium then tensile tested, hardness tested and also observed under microscope. The result of mechanical test shows that the variation 30o/120 second give the best result wich the Ultimate Tensile Strength as value as 15.86 N/mm2 and the brinell hardness as value as 92 BHN on Zud areas, 99 BHN on Zpd areas and 91 BHN on Zpl areas. Microstructure observation shows that there were porosity and crack on some testing spesimen.
PENGARUH JUMLAH DAN KEMIRINGAN SUDU MIXER POROS VERTIKAL (VERTICAL STIRRED MIXER) TERHADAP UNJUK KERJA PENCAMPURAN Suryadhiyanto Untung; Qiram Ikhwanul
ROTOR Vol 11 No 1 (2018)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.897 KB) | DOI: 10.19184/rotor.v11i1.5299

Abstract

Mixing process use to mix liquid, viscous and granular materials. One of the common mixing devices is a vertical stirred mixer which uses a tank and a vertical shaft that rotate mixing blades. This research is done to get the effect of the blade’s number and angle inclination due to mixing performance. Mixing performance is defined as stretching and folding. The research is done by experiment. The blade’s number varies as 2, 3 and 4 blades. Blade’s inclination is varied as 90o, 80o, 70o and 60o. The blades are rotated 10 rpm. A cylinder with 18 cm diameter and 12 cm height use as mixing tank. White wall paint is used as mixing material. Black wall paint uses a tracker. Mixing processes are observed by a camera on top of the mixer. The mixing processes are arranged for 2 mixer shaft rotations. Video data are captured frame by frame and analyzed using image software. The result shows that blade’s number and angle inclination have an effect due to mixing performance. Blade’s number tends to decrease stretching and folding. Blade’s angle inclination also tends to decrease stretching and folding. Keywords: vertical stirred mixer, blade's inclination, stretching, folding
PENGARUH VARIASI FRAKSI VOLUME KOMPOSIT SERAT SABUT KELAPA UNSATURATED-POLYESTER TERHADAP PENGUJIAN TARIK Aulia Hifani Ramanda; Sembada varian Iqbal; Pambudi Fajar Rakhmad; Dermawan Rifki Waldy; Musaffa Salam Qodirun
ROTOR Vol 11 No 1 (2018)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.636 KB) | DOI: 10.19184/rotor.v11i1.6744

Abstract

The development of composite materials in recent years is very rapid. One of them is coco fiber as a material of natural fiber composite amplifier. The benefits of coco fiber coated composites are available, easy raw materials, low density, and easy machining processes. The purpose of this research is to know the mechanical properties of tensile strength with coco fiber reinforcement. In the application of coconut fiber composite engineering products can be used as household, desk panel, ethernet and gypsum. fabrication of coconut fiber-reinforced composites with unsaturated resin-polyester structures as a matrix and coco fiber orientation as reinforced. Variation of volume fraction of composite fiber 0%, 5%, 7,5%, and 10%. The results of this study indicate the fraction of the volume of 7.5% fiber in composites that have tensile test results of 20.2 MPa. While the volume fraction of 10% fiber on composite has the lowest yield of 10.47 Mpa. Keywords: coco fiber composite, hand lay-up, composite volume fraction
ANALISA PENGARUH PERSENTASE CAMPURAN JARAK PAGAR (JATROPHA CURCAS) DAN KAPOK (CEIBA PETANDRA) BIODIESEL TERHADAP PERUBAHAN SIFAT BAHAN BAKAR Dharma Surya; Sebayang Rihat
ROTOR Vol 11 No 2 (2018)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (189.878 KB) | DOI: 10.19184/rotor.v11i1.6005

Abstract

To increase the production of biodiesel from non-edible vegetable oils, it is one of the effective ways to solve the limited number of traditional raw materials and the high prices of these raw materials. The primary objective of this study was to optimize the production of biodiesel derived from non-edible raw materials, namely J. curcas and C. Pentandra. The production process is carried out through the esterification and transesterification process of the mixture of J. curcas and C. Pentandra oils. The results of the study indicate a change in biodiesel properties due to the mixing of raw materials. But overall, the mixture of J. curcas and C. Pentandra oils have characteristic features that are suitable and meet the requirements given in the D6751 ASTM and EN 14214 standards. Keywords: alternative fuels; optimization; non-edible oil; biodiesel mixture
PENGARUH TEMPERATUR ANNEALING TERHADAP KEKERASAN DAN STRUKTUR MIKRO KOMPONEN THRUST WASHER DIFFERENTIAL Anhar Wahyu; Rachmawaty Patria; Dewi Nofika Triana
ROTOR Vol 11 No 1 (2018)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (608.17 KB) | DOI: 10.19184/rotor.v11i1.6772

Abstract

Annealing is a heat treatment process for the softening metallic materials, especially plain carbon steels. Based on the case study was found that thrust washer differential on the dump truck unit-machine model CWB6BLLDN2 fell up failure. Failure of the component was caused by the impact of gear differential on the differential case. The cracking of thrust washer was affected by the characteristic of materials which low resistance to impact load. Variation temperatures of annealing process are used by 825 °C, 875 °C, 925 °C, and 975 °C. Furthermore, a cooling method that been used is cooling on the furnace. Hardness test is used by Vickers hardness test with an indentation load of 200 kgf, and indentation time of 5 s. Cross section of the microstructure is examined by optical microscope. Based on the hardness test, the hardness is decreased by increasing of annealing temperature. Observation of microstructure shown changes on microstructure that been caused by increasing of annealing temperature. Keywords: Annealing, Hardness, Microstructure, Thrust washer differential
RANCANG BANGUN AUTOMATIC AUDIO FREQUENCY FOLIAR FERTILIZATION SEBAGAI TEKNOLOGI ALTERNATIF UNTUK MENINGKATKAN HASIL PRODUKTIFITAS TANAMAN Firmansyah Fahrul; Sumayyah Hany; Mahendra Aditya Danang; Dwilaksana Dedi
ROTOR Vol 11 No 1 (2018)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (243.779 KB) | DOI: 10.19184/rotor.v11i1.8029

Abstract

Automatic Audio Frequency Foliar Fertilization is a technology that improves between the nutrients performed on plant leaves by giving the sensation of sound waves in plants. Automatic Audio Frequency Foliar Fertilization is technology device leaf fertilizer integrated with Sound waves which will run automatically, more practical and compatible. This technology device consists of two main devices of active speakers that will issue a sound with a certain frequency and sprayer fertilizer. The results of the tests that have been done to produce the sound frequency between 1200 Hz up to 1600 Hz with average noise of 5%, with the debit of nutrient spraying for the plant of 96 ml per 30 seconds. Giving exposure treatment Wave The sound of classical music with the provision of nutrients in mustard plants by Automatic Audio Frequency Foliar Fertilization gives a real effect on the growth of the average height of the plant is 2.14 cm per 2 days. Keyword : Automatic, Audio Frequency, Sparyer
PENGARUH VARIASI KONSENTRASI MEDIA PENDINGIN (QUENCHANT) PADA PROSES QUENCH TERHADAP KEKERASAN, STRUKTUR MIKRO DAN RETAK AKIBAT QUENCH (QUENCH CRACK) DARI BAJA AISI 1040 Dharma Surya; Sitompul D Edmond
ROTOR Vol 11 No 1 (2018)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1009.011 KB) | DOI: 10.19184/rotor.v11i1.6003

Abstract

Cracks during the quench process are a common problem. There are several observational parameters in the heat treatment process to succeed, namely the chemical composition of steel and its hardness, the geometry of the components, mechanical handling, the type of cooling fluid, the temperature of the cooling fluid, the conditions of the coolant, the circulation of the cooling media. In mass production, for example, bolt production in the quench process is more dominant in smaller diameters than As Bar compared to larger diameters. In this study, mechanical properties such as hardness, physical properties such as microstructure and cracking were considered as a function of the quenching conditions of AISI 1040 steel with a diameter of 25mm after hardening process at 850oC with the influence of quenchant concentration variations investigated. The microstructure of as-quench martensite and its development during the Hardening process is observed. The results showed changes in hardness and microstructure as well as cracks that occurred from specimens due to the hardening process on Quenchant Variation Key Words: Hardness, Heat Treatment, Quench, Quench Crack, Quenchant

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