Jaffa, Grace Victoria (2023) Pemodelan dan Analisis Reduksi Respon Getaran pada External Grooving Process Akibat Pengaruh Variasi Peletakan Dynamic Vibration Absorber (DVA) pada External Grooving Tool Holder Tipe MGEHR 2525. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Grooving merupakan salah satu jenis dari proses turning yang bertujuan untuk pembentukan alur. Gaya yang terjadi pada proses grooving adalah berupa gaya pemotongan tangensial, gaya axial/thrust force, dan gaya gesek arah radial. Gaya pemotongan arah tangensial yaitu gaya gesek arah radial akan bertambah seiring kenaikan feed rate yang tejadi selama proses namun akan berkurang seiring meningkatnya cutting speed. Selain itu, daerah kontak antara pahat (insert) akan mengalami keausan dikarenakan adanya friction sehingga temperatur dapat meningkat. Selain mengatur nilai cutting parameter, dapat disusun suatu alat mekanis yang dapat meredam getaran berlebih, salah satunya adalah dengan Dynamic Vibration Absorber (DVA). Pada penelitian tugas akhir ini, dilakukan pemodelan dan simulasi menggunakan ANSYS terkait pengaplikasian DVA pada external grooving tool holder. Sebelum melakukan simulasi pada ANSYS, dilakukan pemodelan 3 variasi posisi peletakan DVA pada external grooving tool holder yang digunakan, yaitu MGEHR. Ketiga posisi ini diperhitungkan berdasarkan aspek geometry dari tool holder, dan gaya gesek ataupun gaya pemotongan yang terjadi pada bagian muka insert. Simulasi dilakukan dengan memvariasikan cutting parameter di antaranya adalah kedalaman pahat pemotong yakni 0,5 mm dan 0,6 mm serta variasi kecepatan potong 100,150, dan 200 m/min. Setelah dilakukan simulasi, disimpulkan bahwa secara keseluruhan untuk setiap variasi posisi arah radial (x) pada d_1 dan d_2, getaran dapat direduksi. Getaran belum mampu direduksi pada arah tangensial untuk setiap variasi posisi pada kedalaman pahat pemotong arah radial pada range frekuensi yang telah ditetapkan. Semakin besar kedalaman pahat pemotong maka amplitude frekuensi yang dihasilkan juga besar, namun reduksi getaran semakin kecil.
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Grooving can be classified as in turning process, aims to form grooves. Forces that occurs in grooving process are in the form of tangential cutting forces, axial/thrust forces, and radial frictional forces. The cutting force in tangential direction and friction force in radial direction will increase as the feed rate increases during the process, however will decrease as the cutting speed increases. In addition, the contact area between the inserts and the tool soon will experience wear and tear due to friction as the temperature increases. Besides setting the cutting parameter values, a mechanical device can be arranged to dampen those excess vibrations, the Dynamic Vibration Absorber (DVA). In this final project research, modeling and simulation was carried out using ANSYS Software related to the application of DVA on external grooving tool holder. Before carrying out the simulation on ANSYS, modeling 3 variations of the position of the DVA placement on the external grooving tool holder was used, namely MGEHR, was carried out. These three positions are calculated based on the geometric aspects of the tool holder, and the frictional or cutting forces that occur on the face of the insert. The simulation was carried out by varying the cutting parameters including the cutting tool depth of 0.5 mm and 0.6 mm and variations in cutting speed of 100, 150 and 200 m/min. After the simulation, it was concluded that overall for each variation in the position of the radial direction (x) on d1 and d2, the vibration can be reduced. Vibration has not been able to be reduced in tangential direction for each position variation at the cutting tool depth at a predetermined frequency range. The greater the depth of the cutting tool, the greater the frequency amplitude generated, but the reduction in vibration is smaller.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Dynamic Vibration Absorber, External Grooving Tool Holder, Getaran, Respon Getaran, Chatter Vibration; Dynamic Vibration Absorber, External Grooving Tool Holder, Vibration Response |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Grace Victoria Jaffa |
| Date Deposited: | 18 Sep 2023 02:05 |
| Last Modified: | 18 Sep 2023 02:05 |
| URI: | http://repository.its.ac.id/id/eprint/103454 |
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