Adriadi, Ikralhaq Hilliriany (2022) Analisis Komposisi Rubber Pada Rubber Mass-Dva Boring Bar Untuk Mendapatkan Reduksi Respon Getaran Pada Proses Boring Di Mesin Lathe. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proses permesinan merupakan proses pemotongan benda kerja dengan pembuangan sebagian material berupa chips (geram) sehingga menghasilkan spesifikasi geometris yang diinginkan. Terdapat berbagai macam jenis proses permesinan yang dapat dilakukan, salah satunya proses boring. Proses boring adalah proses memperbesar diameter bagian dalam benda kerja kearah radial (arah luar) dengan alat pemotong bermata tunggal yang disebut dengan boring bar. Ketika proses boring berlangsung, perlu memperhatikan berbagai faktor untuk mendapatkan hasil yang diinginkan. Salah satu faktor tersebut yaitu besarnya getaran sehingga dapat mengurangi performa akurasi pemotongan. Untuk mencegah timbulnya getaran berlebih, maka dapat diatasi dengan cara pemasangan Dynamic Vibration Absorber (DVA) sebagai pereduksi getaran yang terjadi. Pada penelitian tugas akhir ini, dilakukan analisis komposisi rubber yang dipasang pada boring bar sebagai pereduksi getaran. Dalam proses penelitian, pereduksi getaran berupa karet tersebut akan dipasang secara bervariasi dengan menggunakan dua jenis karet yang berbeda. Kemudian, setelah mengetahui nilai reduksi akibat pemasangan karet, nilai tersebut akan dipotong dengan stability. Dalam menunjang proses penelitian simulasi ini, maka digunakansoftware ANSYS Harmonic Response Analysis untuk mengalisa reduksi getaran yang terjadi. Boring bar memiliki diameter 25 mm dan panjang overhang 200 mm atau setara dengan L/D 8. Material pada boring bar berupa AISI 4140 sedangkan benda kerja yang digunakan merupakan AISI 4340 dengan pemotongan diameter dalam 40 mm. Simulasi dilakukan dengan variasi cutting parameter diantaranya adalah variasi kecepatan spindle, variasi feed rate, dan variasi depth of cut. Dari simulasi yang telah dilakukan, desain regular boring bar memiliki daerah operasional stabil pada 6 cutting parameter dengan material removal rate 0,6 cm2 /min – 2,5 cm2 /min dan respon gerak boring bar terendah yakni 0,0004 mm arah sumbu-X, 0,0171 mm arah sumbu-Y, dan 0,0084 mm arah sumbu-Z pada putaran spindle = 2000 rpm, feederate = 0,05 mm/rev, dan depth of cut = 0,1 mm. Sedangkan customized boring bar dengan DVA mampu melakukan proses boring pada 12 variasi cutting parameter dengan material removal rate 0,6 cm2 /min – 11,3 cm2 /min dan respon gerak boring bar terendah yakni 0,00015 mm arah sumbu-X, 0,0046 mm arah sumbu-Y, dan 0,0022 arah sumbu-Z, pada putaran spindle 1250 rpm, feed rate 0,15 mm dan depth of cut 0,1 mm oleh customized boring bar dengan DVA NAAAAAAN. Kemudian variasi customized boring bar DVA ANA A ANA memiliki daerah operasional stabil yang paling luas.
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The machining process is the process of cutting the workpiece by removing some of the material in the form of chips (furious) so as to produce the desired geometric specifications. There are various types of machining processes that can be carried out, one of which is the boring process. The boring process is the process of increasing the inner diameter of the workpiece in a radial direction (outward direction) with a single-edged cutting tool called a boring bar. When the boring process takes place, it is necessary to pay attention to various factors to get the desired result. One of these factors is the magnitude of the vibration so that it can reduce the performance of cutting accuracy. To prevent excessive vibration, it can be overcome by installing a Dynamic Vibration Absorber (DVA) as a vibration reducer that occurs. In this final project, an analysis of the composition of the rubber mounted on the boring bar was carried out as a vibration reducer. In the research process, the vibration reducer in the form of rubber will be installed in various ways using two different types of rubber. In supporting this simulation research process, the ANSYS Harmonic Response Analysis software is used to analyze the vibration reduction that occurs. The boring bar has a diameter of 25 mm and an overhang length of 200 mm or equivalent to L/D 8. The material for the boring bar is AISI 4140, while the workpiece used is AISI 4340 with a cutting diameter of 40 mm. Simulations are carried out with variations in cutting parameters including variations in spindle speed, variations in feed rate, and variations in depth of cut. From the simulations that have been carried out, the regular boring bar design has a stable operational area on 6 cutting parameters with a material removal rate of 0.6 cm2/min – 2.5 cm2/min and the lowest boring bar motion response is 0.0004 mm in the X-axis direction. , 0.0171 mm in the Y-axis direction, and 0.0084 mm in the Z-axis direction at spindle rotation = 2000 rpm, feederate = 0.05 mm/rev, and depth of cut = 0.1 mm. While the customized boring bar with DVA is able to carry out the boring process on 12 variations of cutting parameters with a material removal rate of 0.6 cm2 /min – 11.3 cm2 /min and the lowest boring bar motion response is 0.00015 mm in the X-axis direction, 0, 0046 mm in Y-axis direction, and 0.0022 in Z-axis direction, at 1250 rpm spindle rotation, 0.15 mm feed rate and 0.1 mm depth of cut by customized boring bar with NAAAAAAAN DVA. Then the variety of customized boring bars DVA ANA A ANA has the widest stable operational area.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSM 620.3 Adr a-1 2022 |
| Uncontrolled Keywords: | Boring bar, Dynamic Vibration Absorber, Overhang, Boring bar, Dynamic Vibration Absorber |
| 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: | Mr. Marsudiyana - |
| Date Deposited: | 24 Feb 2025 03:06 |
| Last Modified: | 24 Feb 2025 03:06 |
| URI: | http://repository.its.ac.id/id/eprint/118841 |
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