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Journal : AUSTENIT

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PENGATURAN TEKANAN UDARA PANAS PADA ALAT PEMBUAT ASAP CAIR MENGGUNAKAN TEKNIK MODIFIKASI GATE VALVE Indra Gunawan; Hasbi Hasbi; Amin Rejo
AUSTENIT Vol. 4 No. 02 (2012): AUSTENIT 04022012
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.325 KB) | DOI: 10.5281/zenodo.4544341

Abstract

Pemanfaatannya buah kelapa di Wilayah Sumatera Selatan masih terbatas pada olahan buah kelapa saja sebagai bahan baku pembuatan minyak kelapa dan kebutuhan rumah tangga. Tempurung kelapa sebagai limbah pertanian, jika diolah dengan baik maka akan menjadi sumber nafkah, karena tempurung kelapa memiliki potensi yang baik untuk digunakan sebagai bahan baku industri, salah satunya asap cair (liquefied smoke). Penelitian tentang pembuatan dan pemanfaatan asap cair (liquefied smoke) telah banyak dilakukan sebelumnya namun memiliki banyak kelemahan, diantaranya kurang efektif dan efisien, biaya produksi yang mahal serta sulit pengoperasiaannya. Oleh karena itu, dalam penelitian ini diusulkan pembuatan alat pembuat asap cair yang lebih sederhana, murah dan efisien dengan pengaturan tekanan udara panas mengunaakan teknik modifikasi gate valve. Alat pembuat asap cair yang telah dimodifikasi telah diuji coba dan mampu meningkatkan hasil produksi asap cair 59,3 % pada suhu 2000 C. 
PEMBUATAN SISTIM PREVENTIVE MAINTENANCE PADA BENGKEL PRODUKSI POLITEKNIK NEGERI SRIWIJAYA BERBASIS APLIKASI Ahmad Junaidi; Indra Gunawan; Taufikurrahman Taufikurrahman; Syamsul Rizal
AUSTENIT Vol. 11 No. 1 (2019): AUSTENIT 11012019
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (444.964 KB) | DOI: 10.5281/zenodo.4547791

Abstract

Mesin adalah tulang punggung proses produksi, oleh sebab itu kondisi mesin melalui maintenance harus dijaga supaya tetap dalam keadaan optimum. Peran teknologi informasi sangat diperlukan sebagai alat bantu menjaga kondisi optimum mesin-mesin yang ada, misalnya melalui software yang disebut Sistim Informasi Manajemen (SIM). Di dalam laporan akhira ini peneliti merencanakan pembuatan SIM yang didalam pengaplikasiaannya akan diterapkan di Bengkel Produksi Jurusan Teknik Mesin Politeknik Negeri Sriwijaya Palembang yang disebut dengan Sistim Informasi Preventive Maintenance (SIPM) dengan menggabungkan teori Preventive Maintenan (PM) dan sistem Database. Proses perancangan software menggunakan metode Systems Development Life Cycle (SDLC), yang meliputi: plan, analisa, desain, implementasi dan testing. Alat pengembang yang digunakan adalah Microsoft Access 2010 beserta bahasa pemrograman Visual Basic for Application (VBA).
OPTIMIZATION OF HARDENING AISI 1045 AS MATERIAL FOR CANE CUTTER BLADES USING THE TAGUCHI METHOD Indra Gunawan; Fenoria Putri; Soegeng Witjahjo; Harry Mushafiqih
AUSTENIT Vol. 14 No. 2 (2022): AUSTENIT 14022022
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.7265871

Abstract

PT. X is a company that manufactures sugar. The situation of firm X cannot be described as ideal due to the need for extensive study, particularly on the cane cutter's blade. A common indication of cane cutters is a rapid rate of wear. In this study, researchers employed a qualitative technique based on the taguchi method. The taguchi approach is a modern engineering technique that strives to improve the quality of products and processes while reducing costs and maximizing resources. The taguchi experimental strategy is more effective because it permits research incorporating a large number of variables and numbers. Since a larger hardness response is preferable, the largest confirmation value is the ideal parameter value for the knife manufacturing process on the cane cutter. When measuring the hardness of the blade material on a cane cutter, temperature is a highly important component. According to the findings of the hardness test, the hardest material at a temperature of 750oC and a cooling medium of NaCl solution with a hardness value of 12.4 HRC is, and the hardest material at a temperature of 800oC and a cooling medium of NaOH solution with a hardness value of 59.7 HRC is.
THE EFFECT OF QUENCHING TREATMENT BY VARIATION OF COOLING MEDIA (WATER, USED OIL, COOKING OIL) ON EGREK HARDNESS Fenoria Putri; Indra Gunawan; Dany Agung Rizky
AUSTENIT Vol. 15 No. 1 (2023): AUSTENIT 15012023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.7882141

Abstract

By using water on the gilding, the blacksmith's Egrek was hardened.  The Egrek must have tough hardness. The low hardness causes the Egrek to wear out frequently, so consumers criticize the hardness and toughness of blacksmith products.  Due to the wrong heat treatment, the Egrek cause is easily destroyed. The purpose of this study was to determine the effect of quenching treatment with various cooling media such as water, used oil, and cooking oil on increasing the hardness of blacksmith products. This research method is an experimental quenching using water, used oil, and cooking oil at 800°C, 850°C, and 900°C, with a holding time of 30 minutes. Rockwell hardness test, statistical data processing using ANOVA and supported by the use of expert design software. Having an average carbon content of 0.379%, Egrek's raw material is made of medium carbon steel. Based on the results of the quenching process with water, used oil, and cooking oil affect hardness. The quenching process of the cooking oil cooling medium that occurs at 800°C with a hardness value of 50.1 HRC produces a minimum hardness value, while the maximum average hardness lies in the water cooling medium with a temperature of 900°C of 60.4 HRC. The results of the percentage contribution of each are used oil by 96.37%, cooking oil by 96.61%, while water cooling media contributed by 88.41%. So that the cooling media for used oil and cooking oil can also be used as an alternative choice of cooling media.
Co-Authors Ahmad Junaidi Amin Rejo andreas parlindungan sihombing Dany Agung Rizky Dioni Yoga Pratama Eka Satria Martomi Fatahul Arifin Fathur Raihan Perdana Fenoria Putri Firdaus Firdaus . Gandi Hanggara Harry Mushafiqih Hasbi Hasbi Mochammad Yunus Soegeng Witjahjo Syamsul Rizal Taufikurrahman Taufikurrahman Wirda Novarika Yahya