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All Journal Semesta Teknika Turbo : Jurnal Program Studi Teknik Mesin Jurnal E-Komtek ARMATUR : Artikel Teknik Mesin dan Manufaktur
Tri Pratomo
Politeknik Negeri Pontianak
Aerospace Engineering Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh Perlakuan Panas Terhadap Struktur Mikro Logam St 60 Rina Dwi Yani; Tri Pratomo; Hendro Cahyono
Semesta Teknika Vol 11, No 1 (2008): MEI 2008
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v11i1.797

Abstract

This research aim to know the transformation of microstructure and it influence to ST 60 when its heated by heat treatment process. Specimen heated and arrested at temperature 800°C during 30 minutes, then is cooled with water coolant. Hardness of test piece is measured [by] before and after heat treatment by using method Rockwell C. Microstructure of metal photograph take by using special camera, and it presenting in millimeter block to calculate ferrite and pearlite content percentage. Result of research indicates that heat treatment to metal ST 60 causing microstructure change and percentage of ferrite was increase, directly causes material hardness value  increase too.
Prototipe double acting cylinder transparan sebagai media pembelajaran sistem hidrolik Tri Pratomo; Rina Dwi Yani; Maryono Effendi; Dovian Iswanda; Alban Naufal; Devi Andriani
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 1 (2021): Jurnal TURBO Juni 2021
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i1.1520

Abstract

Double acting cylinders in its application are widely used in the industry and are often applied in maintenance or repair instruments. The purpose of this research is to design and make a double acting cylinder so that the movement of the hydraulic cylinder its fluid flow can be seen clearly and easily implemented in the movement process, especially in the learning process. The research employs experimental method by directly design a transparent double acting cylinder. This transparent double acting cylinder will later be applied to the hydraulic trainer. The steps taken were determining the transparent material, making material samples for tensile tests, designing and making hydraulic cylinders, conducting hydraulic cylinder tests using Autodesk Inventor 2019. From the test results of hydraulic cylinders made from acrylic using Autodesk Inventor 2019, the minimum pressure that occurs is 1,456 MPa and the maximum pressure that occurs is 6,573 MPa, in operation, the recommended pressure 1,456 to 5,551 MPa, double acting transparent cylinder which has a transparent hydraulic cylinder length of 250 mm, thickness 11.4 mm, hydraulic cylinder inner diameter 32 mm, hydraulic cylinder locking uses 4 bolts with size M8, design pressure 23 kg/cm².Keywords: hydraulic system, double acting cylinder, transparent.
Laboratory tests of blade radius variation on vertical shaft savonius turbine performance Kurniawan Kurniawan; Tri Pratomo; Nurhaidah Nurhaidah; Devi Andriani; Supandi Supandi
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol 4 No 1 (2023): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v4i1.3292

Abstract

Wind turbines are one of the machines that are currently still used to convert wind kinetic energy so that they can be used by humans such as to drive pumps in agriculture and produce electrical energy. Savonius turbine is a vertical axis turbine that is currently widely used as an electrical energy generator, this wind turbine is a type of drag type wind turbine that has a simple design that is in the form of a semicircular curved blade side. Therefore, the author is interested in researching the resulting performance including turbine rotational speed, power generated, and wind turbine efficiency against the variation of the blade radius. The method used is experimental, the stages of this research are in the form of literature studies, making savonius turbines, testing savonius turbines with variations in blade radius as well as data retrieval, data processing, and analysis. Based on the data obtained, the rotating speed of the turbine is influenced by variations in the radius of the blade. The larger the blade radius, the smaller the turbine rotational speed. The maximum turbine rotation speed at blade radius 63 is 173 rpm, while at blade radius, 88 is 118 rpm and at blade radius 113 is 115 rpm. So the highest turbine rotating speed at a radius of 63.
Design a Pepper Seed Drying Oven with a Capacity of 8-10 (kg/hour) Alban Naufal; Yosdy Nurliansyah; Rina Dwi Yani; Tri Pratomo
Jurnal E-Komtek Vol 7 No 1 (2023)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v7i1.1187

Abstract

Pengeringan menggunakan oven dilakukan untuk supaya lada lebih bersih dari kotoran serta efisien terhadap waktu terhadap pengeringan lada, Proses pengeringan dari biji lada ini masih dilakukan dengan mengandalkan sinar matahari, dimana jika kondisi cuaca hujan akan sangat memperlambat pengeringan. Untuk itu dibutuhkan oven sebagai alat untuk pengering biji lada, agar tidak terlalu bergantung dengan kondisi cuaca. Sistem pemanas oven ini menggunakan gas LPG, hygrometer yang digunakan untuk mengukur suhu serta kelembaban dan thermostat untuk mengatur suhu ruangan didalam oven, juga di lengkapi dengan pemantik api otomatis supaya mempermudah dalam menghidupkan api didalam oven. Pengeringan lada yang telah diuji mulai dari 50?C, 60?C, 70?C, 80°C dan 90?C semua kering dengan waktu terlama 99 menit dan waktu tercepat 15 menit.
Co-Authors Alban Naufal Devi Andriani Dovian Iswanda Hendro Cahyono Kurniawan Kurniawan Maryono Effendi Nurhaidah Nurhaidah Rina Dwi Yani Supandi Supandi Yosdy Nurliansyah