Pemodelan Dan Analisa Pengaruh Penambahan Split Radial Vibration Damper (SpRVD) Terhadap Respon Reduksi Getaran Benda Kerja Pada Proses Boring Di Lathe Machine Menggunakan Software Ansys

Yusuf, Teddy Rahardian (2021) Pemodelan Dan Analisa Pengaruh Penambahan Split Radial Vibration Damper (SpRVD) Terhadap Respon Reduksi Getaran Benda Kerja Pada Proses Boring Di Lathe Machine Menggunakan Software Ansys. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pada proses permesinan pengerjaan material dengan mesin bubut masih banyak digunakan dalam dunia industri. Salah satunya pengerjaan mesin bubut dengan proses boring. Pada proses boring terdapat banyak hal yang dapat mempengaruhi hasil pengerjaan salah satunya getaran yang berlebih. Getaran dengan amplitudo yang sangat tinggi akan menghasilkan chatter pada benda kerja dan akan berdampak pada kualitas produk yang dihasilkan. Untuk mengurangi resonansi akibat dari amplitudo yang sangat tinggi diperlukan pemasangan Dynamic Vibration Absorber (DVA) untuk mereduksi getaran berlebih pada benda kerja. Penelitian tugas akhir ini mengenai simulasi dengan menggunakan software ANSYS harmonic response analysis dan analisa reduksi getaran pada benda kerja yang diberi Split Radial Vibration Damper (SpRVD). Massa SpRVD didesain berbentuk clamp yang displit dengan material AISI 4340 dan kekakuan SpRVD dari karet dengan variabel material karet yang digunakan yakni silicone rubber dan polyurethane rubber. Terdapat juga variasi peletakan SpRVD pada workpiece dengan posisi peletakan di ujung (L), ¾ L, dan ½ L. Komponen sistem utama yang dianalisa pada penelitian ini adalah benda kerja ii dengan diameter 38 mm dan panjang overhang 8 x D dimana memiliki frekuensi natural 440 Hz. Chatter frequency sebagai frekuensi eksitasi bernilai antara 358 Hz – 545 Hz yang didapat dari 9 cutting parameter dengan variasi putaran spindle (n) = 920 rpm, 1250 rpm, dan 2000 rpm, feed rate (f) = 0,1 mm/rev, dan 0,15 mm/rev, dan depth of cut (d) = 0,1 mm, 0,2 mm, 0,3 mm. Material benda kerja yang digunakan merupakan AISI 4340. Output dari penelitian tugas akhir ini adalah frequency response (bode diagram) dan stable plot. Dari simulasi yang telah dilakukan, terdapat 5 dari 9 cutting parameter mengalami stabil setelah penambahan SpRVD dengan respon gerak workpiece terendah yakni 0,00306 mm arah sumbu-y dan 0,00216 mm arah sumbu-z. Pada cutting parameter yang efektif sistem tereduksi dengan hasil yang variatif. Hasil reduksi getaran yang didapat antara respon amplitudo workpiece yang tidak diberi SpRVD dan yang diberi SpRVD dengan persentase reduksi terendah terdapat pada putaran spindle = 1250 rpm, feed rate = 0.1 mm/rev, dan depth of cut = 0.1 mm dengan hasil reduksi sebesar 65.9 % dan untuk persentase reduksi terbesar pada putaran spindle = 2000 rpm, feed rate = 0.1 mm/rev, dan depth of cut = 0.3 mm dengan hasil reduksi sebesar 95.6 %. Berdasarkan penelitian ini didapatkan sistem paling stabil dan tereduksi dengan baik pada sistem utama dengan material kekakuan karet polyurethane dan posisi peletakan di ujung (L) pada workpiece. ===================================================================================================== In the process of machining material processing with a lathe, it is still widely used in the industrial world. One of them is working on a lathe with a boring process. In boring processes, there are many things that can affect the work, one of which is excessive vibration. Vibration with a very high amplitude will produce chatter on the workpiece and will have an impact on the quality of the resulting product. To reduce resonance due to very high amplitudes, it is necessary to install a Dynamic Vibration Absorber (DVA) to reduce excessive vibrations in the workpiece. This final project research is about simulation using ANSYS harmonic response analysis software and vibration reduction analysis on a workpiece given a Split Radial Vibration Damper (SpRVD). The mass of SpRVD is designed in the form of a split clamp with AISI 4340 material and the SpRVD stiffness of rubber with the rubber material variables used, namely silicon rubber and polyurethane rubber. There is also a variation in the placement of the SpRVD on the workpiece with the position at the end (L), ¾ L, and ½ L. The main system components analyzed in this study are the workpiece with a diameter of 38 mm and a long overhang. 8 x D which has a natural frequency of 440 Hz. Chatter frequency as the excitation frequency is between 358 Hz - 545 Hz iv obtained from 9 cutting parameters with variations in spindle rotation (n) = 920 rpm, 1250 rpm, and 2000 rpm, feed rate (f) = 0.1 mm / rev, and 0.15 mm / rev, and depth of cut (d) = 0.1 mm, 0.2 mm, 0.3 mm. The workpiece material used is AISI 4340. The output of this final project is a frequency response (bode diagram) and a stable plot. From the simulations that have been carried out, there are 5 out of 9 cutting parameters that have stabilized after the addition of SpRVD with the lowest workpiece motion response, namely 0.00 306 mm in the y -axis direction and 0.0 0216 mm in the z-axis direction. In effective cutting parameters the system is reduced with varied results. The vibration reduction results obtained between the amplitude response of the workpieces that were not given SpRVD and those that were given SpRVD with the lowest percentage reduction were at spindle rotation = 1250 rpm, feed rate = 0.1 mm / rev, and depth of cut = 0.1 mm with a reduction result of 65.9% and for the largest percentage reduction in spindle rotation = 2000 rpm, feed rate = 0.1 mm / rev, and depth of cut = 0.3 mm with a reduction of 95.6%. Based on this research, it was found that the most stable and well-reduced system in the main system with polyurethane rubber stiffness material and the position of the end (L) of the workpiece.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Workpiece, Radial Vibration Damper, Vibration Reduction, Benda Kerja, Radial Vibration Damper, Reduksi Getaran.
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > TJ1185 Metal-cutting--Problems, exercises, etc.
T Technology > TJ Mechanical engineering and machinery > TJ1186 Metal-cutting tools.
T Technology > TJ Mechanical engineering and machinery > TJ1186.B5 Metal-cutting tools--Design and construction.
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Teddy Rahardian Yusuf
Date Deposited: 08 Mar 2021 09:11
Last Modified: 08 Mar 2021 09:11
URI: https://repository.its.ac.id/id/eprint/83773

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