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Ozkar F Homzah
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AUSTENIT
Published by Politeknik Negeri Sriwijaya
ISSN : 20851286     EISSN : 26227649     DOI : https://doi.org/10.53893/austenit
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
AUSTENIT (pISSN 2085-1286 and eISSN 2622-7649) is a peer-reviewed open access journal published by Mechanical Engineering Department, Politeknik Negeri Sriwijaya. Focused on original articles in the form of technical and vocational research results or literature review which provides insight in the field of mechanical engineering and machinery that includes Mechanical Structure, Manufacturing, Metallurgy Sciences and Engineering, Design Engineering, Maintenance and Repair Engineering, Fluid Dynamics, HVAC (Heating, Ventilation and Air Conditioning), Heat-Mass Transfer, Sustainable Renewable Energy, Mechatronic and Control Systems or as well as other related Mechanical Engineering field study.
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Articles 6 Documents
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Search results for , issue "Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020" : 6 Documents clear
STUDI EKSPERIMENTAL: ANALISA KEGAGALAN RODA GIGI PADA GEAR BOX MESIN SCREW PRESS KELAPA SAWIT Pratama Pela Krisna; Taufikurahman .; Ella Sundari
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The gear is a connecting component or power transmission of a machining process, if there is damage to the gears of an engine then this results in the inability to work on a machine. In this study, the damage to the gear of the screw press was broken and split so that several tests were used, namely the hardness test, the metallographic test and the composition test. The results showed that the damage occurred due to the lack of hardness in the gear where the hardness value of the screw press gear was 144.457 kg / mm² while the minimum hardness based on ASTM A291 was around 170-230 kg / mm². In the metallographic test, it can also be seen that there are cracks in the material structure of the screw press gear which causes the teeth to break and split. The composition test was carried out and it was found that the gear material contained a high enough carbon element, namely 5.05%, with this carbon value it could be concluded that the type of gear material for the screw press machine was cast iron with the addition of several alloys. Keywords:   Gears, Screw Press machine, Gear Box, Brinnel-Test, Metallography
PROSES PENGOLAHAN LIMBAH B3 (OLI BEKAS) MENJADI BAHAN BAKAR CAIR DENGAN PERLAKUAN PANAS KONSTAN Muhammad Ade Ariasya; Azharuddin .; Almadora Anwar Sani
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The use of waste used oil is increasing every year, the resulting waste will also increase. Waste used oil is included in B3 waste which needs special handling. In line with the development of cities and regions, the volume of used oil continues to increase in line with the increase in the number of motorized vehicles and motorized machines. Even in rural areas, you can find small workshops, one of which is used oil. . In other words, the distribution of used oil is very wide from big cities to rural areas throughout Indonesia. The process in this research is changing the waste used oil into liquid fuel with the constant heat treatment. It is aimed to know the best result in the temperature of 250°C, 300°C and 350°C with pyrolysis process. The increase of temperature has a big effect toward the result of the exchanging process. The best result is at the temperature of 350°C which the volume got from the tap A is 1 liter and from the tap B is 0.2 liter. Than the tap sample A was tested against the exiting fuel standards. Based on the result of the specification test on the process of changing waste used oil, it was found that there were many weaknesses like the high viscosity value and the high content of water in the resultant product. But for other physical properties had fulfilled the standard of the fuel.Keywords: Temperature, used oil, pyrolysis, liquid fuel. 
PENERAPAN SISTEM REFRIGERASI PADA ALAT PEMBUAT ASAP CAIR UNTUK PENGOPTIMALAN HASIL PRODUKSI Herlin Sumarna; Haryanto .; Baiti Hidayati; Ozkar F Homzah
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Recently, liquid smoke is widely used for various needs, both for food purposes and for freezing rubber latex. Liquid smoke began to grow due to the large demand, also using biomass / waste as a base material. Immediate production results are needed by the condensation process. The application of the refrigeration system guides the temperature of the air which is used as a cooling medium in the condensation process during the process of making liquid smoke. This study uses coconut shell as raw material for pyrolysis, and there are 4 temperature variations that are applied in the liquid smoke production process. First without a refrigeration system, the application of a refrigeration system with temperature variations of 22 ° C, 18 ° C and the last one is 15 ° C. The data is taken every 30 minutes for 6 hours. Based on the research results, it was found that the maximum production results using the refrigeration system at an air temperature of 15 ° C, resulted in 375 ml of liquid smoke. Keywords: Liquid Smoke, Refrigeration, Pyrolysis, Coconut Shell
RANCANG BANGUN MESIN PENGIRIS BAWANG MERAH SISTEM MATA PISAU ROTARI SUMBU VERTIKAL Eka Sari Wijianti; Novriyanda Novriyanda; Saparin Saparin
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Bawang merah merupakan bahan yang digunakan untuk membuat bawang goreng. Salah satu tahap pengolahan bawang merah menjadi bawang goreng adalah dengan mengiris bawang dengan ketebalan tertentu kemudian digoreng menggunakan minyak panas. Produsen bawang goreng ataupun industri kuliner masih banyak yang memproduksi bawang goreng masih mengiris bawang secara manual. Oleh karena itu, dirancang teknologi tepat guna berupa mesin pengiris bawang merah dengan sistem mata pisau rotari sumbu vertikal. Cara kerja mesin adalah dengan memutarkan mata pisau menggunakan motor listrik 200 watt dengan putaran 350 rpm dan dimensi mesin dengan panjang 53 cm x lebar 42 cm x tinggi 105 cm. Hasil penelitian diperoleh kapasitas output mesin pengiris bawang merah mampu mengiris bawang merah dengan hasil rata-rata bawang kategori baik adalah 454,66 gram, 30 gram kategori tidak baik, dan kategori tertinggal 15,33 gram dengan waktu pengirisan 59,62 detik. Kapasitas produksi mesin pengiris bawang merah ini sebesar 27,432 Kg/jam dengan tingkat efisiensi produksi mesin mencapai 90,93%
Coverage Vol 12 No 2 Redaksi .
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

AUSTENIT adalah media ilmiah yang diterbitkan oleh Jurusan Teknik Mesin Politeknik Negeri Sriwijaya, yang dikelola oleh dewan redaksi berpengalaman yang berasal dari Perguruan Tinggi di Indonesia dan Mitra Luar Negeri. AUSTENIT terbit secara berkala 2 kali dalam setahun yang direncanakan terbit Bulan April dan Oktober.  Pada Volume 12 Nomor 2 terdapat 5 artikel, yang ditulis dari Akademisi Universitas Bangka Belitung, Politeknik Sekayu dan Politeknik Negeri Sriwijaya. Setiap artikel Ilmiah yang dimuat pada AUSTENIT telah diseleksi oleh dewan redaksi dan telah melewati tahapan single blind reviewoleh Mitra Bestari yang kompeten dibidangnya. Diharapkan, Edisi ini dapat dijadikan referensi dan memberikan sumbangsih keilmuan bagi pembacanya.
STUDI PENYUSUTAN PEMBUATAN GIGI PALSU DENGAN 3D PRINTING FDM PENDEKATAN METODE TAGUCHI Ahmad Zamheri; Fatahul Arifin; Angga Panjy Syahputra
AUSTENIT Vol. 12 No. 2 (2020): AUSTENIT: Oktober 2020
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Fused Deposition Modeling (FDM) is a 3D Printing technique used to print products using filaments as material. The printed product has ideal geometric characteristics if it has meticulous size and perfect shape. The main objective of this research is to find out the shrinkage of the material is the filament human denture product using prameter is different. In the process of testing this test using the tool testers Digimatic Vernier Caliper Mitutoyo Absolute, which uses accuracy 0,02 mm. The Taguchi method are used to analyzed the data result. Manufacture process which is used Layer Height 0,15 mm, Print Speed 20 mm/s, dan Print Temperature 220 ⁰C.Keywords: FDM 3D Printing, Shrinkage, Taguchi 

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