Analisa Pengaruh Penggunaan 2-DOF Electromagnetic Vibration Energy Harvester (EMEH) terhadap Respon Getaran dan Energi Bangkitan dari Proses Milling

Parwata, Anak Agung Anandika (2021) Analisa Pengaruh Penggunaan 2-DOF Electromagnetic Vibration Energy Harvester (EMEH) terhadap Respon Getaran dan Energi Bangkitan dari Proses Milling. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proses pengerjaan logam merupakan sektor utama pada industri manufaktur. Terdapat berbagai proses pada proses pengerjaan logam salah satunya adalah proses milling. Terdapat berbagai variabel yang memengaruhi hasil dari proses milling, diantaranya adalah getaran berlebih dan kondisi pahat. Pada penelitian ini digunakan metode chatter vibration prediction dan mekanisme Electromagnetic Vibration Energy Harvester (EMEH) guna menyelesaikan masalah tersebut.
Penelitian tugas akhir ini melakukan simulasi pada software ANSYS guna mengetahui respon getaran pada proses milling yang menggunakan mekanisme EMEH, serta mengetahui luaran energi bangkitan yang dihasilkan EMEH dalam berbagai variasi cutting parameter. EMEH berbentuk silinder terdiri dari dua buah magnet, rubber dan kumparan. Magnet menggunakan material NdFeB30, rubber menggunakan material neoprene rubber, dan kumparan menggunakan material copper. Sistem utama pada penelitian ini merupakan benda kerja berbentuk balok dengan dimensi 300 mm x 200 mm x 10 mm, dengan frekuensi natural 545,77 Hz. Penelitian ini melakukan simulasi respon getaran dengan gaya eksitasi bervariasi dari 42,05 N – 183,71 N. Frekuensi natural EMEH didesain pada frekuensi 63,82 Hz, yang mana memiliki nilai yang relatif sama dengan chatter frequency sebagai frekuensi eksitasi yang didapat dari berbagai cutting parameter dengan variasi putaran spindle (n) = 490 rpm, 550 rpm, 600 rpm, lebar potongan (b) = 0,5 mm, 1 mm, 1,5 mm dan kedalaman potongan (h) = 0,05 mm, 0,1 mm, 0,15 mm, 0,20 mm, dan 0,25 mm yakni 62,6 Hz – 87,4 Hz. Material benda kerja yang digunakan adalah AISI 1045. Output dari penelitian ini adalah frequency response (bode diagram), serta nilai energi bangkitan dari tiap kumparan pada EMEH.
Dari hasil penelitian didapat bahwa variasi lebar potongan (b) dan kedalaman potongan (h) tidak memengaruhi reduksi respon getaran pada sistem. Sedangkan variasi putaran spindel (n) memengaruhi nilai reduksi respon getaran pada sistem. Didapat juga bahwa dengan adanya penambahan EMEH nilai amplitudo sistem mengalami reduksi yang signifikan dengan nilai 99,99987% pada n = 490 rpm, 99,99971 % pada n = 550 rpm, dan 99,99973% pada n = 600 rpm. Energi bangkitan yang dihasilkan EMEH dipengaruhi oleh variasi cutting parameter. Energi bangkitan total terbesar dihasilkan oleh variasi cutting parameter b = 1 mm, h = 0,20 mm, dan n = 490 rpm dengan nilai 3,26E-04 mW. Sedangkan nilai terkecil terdapat pada variasi cutting parameter b = 0,5 mm, h = 0,05 mm, dan n = 600 rpm dengan nilai 2,75E-05 mW. Sehingga dapat diketahui dari penelitian ini bahwa variasi putaran spindel n = 490 rpm yang paling baik digunakan.
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Metal processing is one of the main sectors in manufacturing industry. There are many processes in metal processing, and milling process is one of them. There are many variables that affects the result of milling process, such as excess vibration and tool condition. This research is conducted using chatter vibration prediction and Electromagnetic Vibration Energy Harvester mechanism to solve those problems.
This final project research is using ANSYS software simulation to solve the vibration response of milling process using EMEH, and to solve energy harvested by EMEH using various cutting parameter. EMEH is cylinder shaped consist of two magnets, two rubbers, and two coils. The magnet is using NdFeB30 as material, the rubber is using neoprene rubber as material, and the coil is using copper as material. Main system in this research consists of a cuboid workpiece that has 300 mm x 200 mm x 10 mm in dimension and having natural frequency of 545,77 Hz. The simulation in this research is to solve vibration response caused by varied excited force from 42,05 N – 183,71 N. Natural frequency of EMEH is designed at 63,82 Hz, which has almost the same value as chatter frequency that is obtained through various cutting parameter with spindle speed variation (n) = 490 rpm, 550 rpm, 600 rpm, width of cut(b) = 0,5 mm, 1 mm, 1,5 mm and depth of cut (h) = 0,05 mm, 0,1 mm, 0,15 mm, 0,20 mm, and 0,25 mm which chatter frequency varies from 62,6 Hz – 87,4 Hz. Material of workpiece used is AISI 1045. Output from this research is frequency response (bode diagram), and energy harvested through each EMEH.
From this research found that width of cut (b) and depth of cut (h) variation did not affect vibration response reduction on system. Meanwhile, spindle speed variation (n) affects vibration response reduction on system. It is also known with the usage of EMEH on system, the amplitude of the system is significantly reduced by 99,99987% using n = 490 rpm, 99,99971 % using n = 550 rpm, and 99,99973% using n = 600 rpm. Energy harvested using EMEH also affected by cutting parameter variation. The highest total energy harvested is produced by cutting parameter b = 1 mm, h = 0,20 mm, and n = 490 rpm which valued at 3,26E-04 mW. Meanwhile the smallest energy harvested is produced by cutting parameter b = 0,5 mm, h = 0,05 mm, dan n = 600 rpm which valued at 2,75E-05 mW. From this research we found that spindle speed n = 490 rpm is most suitable used.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Milling, Electromagnetic Vibration Energy Harvester, Chatter, Translasi, ANSYS, Translation.
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage. T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Anak Agung Anandika Parwata
Date Deposited:	09 Aug 2021 03:51
Last Modified:	09 Aug 2021 03:51
URI:	http://repository.its.ac.id/id/eprint/85217

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