Lestari, Heny (2019) Studi Eksperimen dan Analisis Reduksi Respon Getaran Translasi pada Proses Drilling Material Aluminium Menggunakan Sistem Translational Mass Vibration Absorber (TMVA). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proses pengerjaan logam merupakan sektor utama yang dikerjakan dalam industri manufaktur. Terdapat berbagai jenis mesin-mesin perkakas yang digunakan dalam industri manufaktur, salah satunya mesin drilling. Setiap mesin yang bekerja pasti akan menghasilkan getaran. Besarnya getaran pada mesin drilling bergantung pada jenis benda kerja, kondisi dan ukuran mata bor, serta kondisi mesin. Getaran yang dihasilkan dari pergerakan mesin dapat menyebabkan kerusakan pada komponen-komponen mesin. Sehingga dapat menurunkan efektifitas dan produktifitas kerja mesin. Untuk mereduksi getaran yang terjadi, maka digunakan Dynamic Vibration Absorber (DVA).
Penelitian tugas akhir ini mengenai studi eksperimen menggunakan konsep Dynamic Vibration Absorber (DVA) jenis Translational Mass Vibration Absorber (TMVA) untuk mereduksi adanya getaran translasi arah vertikal pada mesin drilling Kao Ming Machinery Industrial Co., Ltd model KMR-700DS dengan kecepatan operasi mesin 441 rpm. TMVA memiliki gerakan hanya translasi arah vertikal saja. TMVA didesain berbentuk selongsong silinder berbahan akrilik yang didalamnya terdapat koin besi dan sebuah pegas. Komponen sistem utama yang dianalisis pada penelitian ini adalah benda kerja dan mata bor. TMVA digunakan untuk meredam getaran pada benda kerja saat proses drilling. Benda kerja yang digunakan berupa plat aluminium (Al) dengan ukuran 350 mm × 150 mm × 20 mm dengan massa 2.7 kg. Terdapat 3 variasi yang digunakan antara lain variasi ukuran mata bor, variasi rasio massa TMVA, dan variasi posisi drilling material terhadap radius pusat peletakan TMVA.
Eksperimen ini dilakukan dengan dua kondisi, yaitu sistem utama tanpa penambahan TMVA dan sistem utama dengan penambahan TMVA. Didapatkan hasil berupa respon percepatan getaran, persentase reduksi, penampakan permukaan material hasil drilling, dan perbandingan diameter hasil drilling pada setiap variasi yang digunakan. Berdasarkan hasil eksperimen dapat disimpulkan bahwa penambahan massa peredam 1/20 dari massa benda kerja yang direpresentasikan dengan 2 koin mampu meredam secara efektif pada ukuran mata bor 12 mm sebesar 31.91%. TMVA mampu meningkatkan tingkat akurasi diameter hasil drilling material sebsesar 0.15 mm. Selain itu, posisi drilling material juga mempengaruhi besarnya respon percepatan getaran yang dihasilkan. Semakin besar respon percepatan getaran maka konstanta kekakuannya akan semakin kecil dan semakin besar respon percepatan getaran maka besar radiusnya terhadap pusat peletakan TMVA akan semakin besar.
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The metal working is the main sector of the manufacturing industry. There are many types of machine tools used in the manufacturing industry, one of them are drilling machine. Every working machine will definitely produce vibration. Vibration that comes from a working drilling machine can reduce the effectiveness of machine and damage to machine components. And eventually reduce company productivity. The vibration from the drilling machine can be overcome by using Dynamic Vibration Absorber (DVA). The main system of DVA is the mass of absorber and the spring.
This final project is about an experimental study of Translational Mass Vibration Absorber (TMVA) which is one of Dynamic Vibration Absorber (DVA) types. TMVA is designed to be able to reduce the vertical vibrations caused by the rotational speed of drilling machine. The drilling machine used is Kao Ming Machinery Industrial Co., Ltd type KMR-700DS. TMVA has only vertical direction movement. TMVA is designed in the cylindrical shells made of acrylic. The TMVA consists of the absorber mass and a spring. The main system of the drilling machine that is being observed in this final project are workpieces and drill bits. TMVA is only placed on the workpiece during the drilling process. The workpiece is an aluminum plate (Al) with 350 mm × 150 mm × 20 mm size and the mass is 2.7 kg. In this study, TMVA is made with a spring constant value that has been adjusted to rotational speed of machine namely 287,625 N / m. There are 3 variations used, that is the drill size, the TMVA mass ratio, and the drilling material position for the radius of TMVA.
The experiment carried out in two different conditions, that is the main system without TMVA and the main system with TMVA. The results are about vibration acceleration response, percentage of reduction, surface of the drilling material, and comparing the drilling diameter for each variations used. TMVA can reduce vibration at the rotational speed of 441 rpm and at the feeding of 0.07 mm/rev. Based on the experiment done, it can be concluded that the addition of 1/20 mass of absorber from the workpiece mass represented by 2 coins can effectively reduce the vibration in 12 mm drill size by 31.91%. TMVA is able to increase the accuracy level of drilling material of 0.15 mm. Furthermore, the drilling material positions affects the magnitude of the vibration response produced. The greater the vibration response, the stiffness constants will be smaller and the greater the vibration response, the greater the radius of the TMVA placement.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Translational Mass Vibration Absorber (TMVA), Mesin Drilling, Reduksi, Getaran, Translasi. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | HENY LESTARI |
| Date Deposited: | 21 Jul 2026 00:54 |
| Last Modified: | 21 Jul 2026 00:54 |
| URI: | http://repository.its.ac.id/id/eprint/64937 |
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