Chasanah, Nur Maulida (2019) Pemodelan dan Analisa Respon Reduksi Getaran Translasi Pada Proses Drilling Material Aluminium (Al) Dengan Penambahan Sistem Dynamic Vibration Absorber (DVA). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proses permesinan merupakan proses pemotongan atau pembuangan sebagian material yang bertujuan untuk membentuk suatu produk yang diinginkan. Terdapat berbagai macam proses permesinan yang dapat dilakukan, salah satunya yaitu proses drilling. Ketika proses drilling berlangsung, timbul getaran yang dihasilkan akibat motor listrik yang beroperasi. Getaran juga disebabkan akibat dari gesekan antara mata bor yang berputar dengan material saat proses drilling. Apabila getaran tersebut memiliki amplitudo yang besar (resonansi), tentunya berdampak pada penurunan kualitas produk yang dihasilkan. Selain itu, dalam kurun waktu tertentu getaran juga dapat merusak berbagai komponen mesin yang ada pada mesin drill. Oleh karena itu, untuk menghindari resonansi diperlukan pemasangan dynamic vibration absorber (DVA) sebagai peredam supaya efisiensi mesin drill meningkat. Pada penelitian tugas akhir ini, dilakukan analisa penerapan reduksi getaran menggunakan DVA pada mesin perkakas, yaitu mesin drill. Analisa ini dilakukan dengan mensimulasikan sistem terkait menggunakan software matlab simulink. Proses peredaman getaran dilakukan ketika proses drilling berlangsung. DVA yang digunakan berupa massa dan pegas yang dirancang untuk meredam getaran pada sistem utama ke arah translasi sumbu x dan y. Untuk mengetahui respon getaran sistem utama, dilakukan variasi penggunaan ukuran mata bor berdiameter 8 mm, 10 mm, dan 12 mm dengan frekuensi operasi sebesar 441 rpm. Untuk mengetahui reduksi getaran sistem utama, dilakukan variasi peredaman menggunakan rasio massa DVA terhadap sistem utama sebesar 1/40, 2/40, dan 3/40. Hasil dari penelitian ini didapatkan respon getaran sistem utama paling besar ketika dilakukan proses drilling menggunakan ukuran mata bor 12 mm dengan nilai 1.1038 x 10-8 m/s2 untuk arah x dan 6.5491 x 10-10 m/s2 untuk arah y. Untuk hasil respon getaran paling kecil setelah dilakukan penambahan DVA, didapatkan pada DVA dengan rasio massa sebesar 1/20 massa utama pada setiap variasi mata bor. Hasil tersebut berlaku untuk respon getaran arah x maupun y. Sedangkan respon resuksi getaran terbesar dihasilkan saat proses drilling menggunakan mata bor ukuran 12 mm dengan penambahan DVA yang memiliki rasio massa 1/20 massa sistem utama. Respon reduksi getaran yang dihasilkan sebesar 89.18121105 % untuk getaran arah x dan 89.18889618 % untuk getaran arah y.
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The machining process is the process of cutting or removing some material that aims to form a desired product. There are various kinds of machining processes that can be done, one of which is the drilling process. When the drilling process takes place, vibrations are generated due to the electric motor that operates. Vibration is also caused due to friction between the rotating drill bits and the material during the drilling process. If the vibration has a large amplitude (resonance), it certainly has an impact on the quality of the product produced. In addition, in a certain period of time vibration can also damage various engine components that exist in the drill machine. Therefore, to avoid resonance, the installation of dynamic vibration absorber (DVA) is needed to reduce the efficiency of the drill machine. In this final project research, an analysis of the application of vibration reduction using DVA will be carried out on machine tools, namely drill machines. This analysis is done by simulating the related system using the matlab simulink software. Vibration damping process is carried out when the drilling process takes place. DVA is used in the form of mass and spring designed to dampen vibrations in the main system towards the translation of the x and y axes. To determine the vibration response of the main system, variations in the use of drill bits of diameter 8 mm, 10 mm, and 12 mm were carried out with an operating frequency of 441 rpm. To determine the main system vibration reduction, damping variation was carried out using the DVA mass ratio of the main system at 1/40, 2/40, and 3/40. The results of this study found that the main system vibration response was greatest when the drilling process was carried out using a 12 mm drill eye size with a value of 1.1038 x 10-8 m/s2 for x and 6.5491 x 10-10 m/s2 for y direction. For the smallest result of vibration response after addition of DVA, it was obtained in DVA with a mass ratio of 1/20 of the main mass in each variation of the drill bit. This result applies to the response of the x and y direction vibrations. Whereas the biggest vibration recovery response is produced during the drilling process using a 12 mm drill bit with the addition of DVA which has a mass ratio of 1/20 of the main system mass. The vibration reduction response produced was 89.18121105 % for x and 89.18889618 % vibration for y direction vibration.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSM 620.37 Cha p-1 2019 3100019081282 |
| Uncontrolled Keywords: | Vibration, DVA, Drill Machine |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Nur Maulida Chasanah |
| Date Deposited: | 07 Nov 2025 02:53 |
| Last Modified: | 07 Nov 2025 02:53 |
| URI: | http://repository.its.ac.id/id/eprint/64845 |
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