Riyadini, Visa Ramanitya (2023) Analisis Nilai Reduksi Respon Getaran Boring Bar Akibat Pengaruh Penambahan Damper Rod Pada Proses Permesinan (Lathe Machine). Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 02111940000001-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
02111940000001-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 September 2025. Download (8MB) | Request a copy |
Abstract
Mesin bubut dapat digunakan untuk memperbesar lubang dengan diameter tertentu menggunakan alat pemotong bermata tunggal yang disebut dengan boring bar. Pada saat pengerjaan spesimen, seringkali terjadi getaran berlebih yang dihasilkan oleh mesin bubut sehingga dapat mengurangi kualitas hasil dari spesimen dan mempengaruhi performa pada proses pengeboran. Untuk meredam getaran pada mesin bubut dapat dilakukan dengan menambahkan damper rod pada boring bar. Pada penelitian tugas akhir ini dilakukan simulasi dengan software ANSYS mengenai rancangan mekanisme boring bar dengan damper rod yang mampu mereduksi getaran pada proses boring. Simulasi dilakukan pada model yang sebelumnya didesain menggunakan software Solidworks. Boring bar menggunakan material EN31 Steel dengan diameter 25 mm dan panjang body 254 mm. Damper rod diletakkan di dalam boring bar dengan diameter 10 mm dan memiliki empat variasi panjang diantaranya 254 mm, 190,5 mm, 127 mm, 63,5 mm, serta memiliki tiga variasi material yakni Naval Brass, Muntz Metal, dan Leaded Brass. Simulasi dilakukan dengan variasi cutting parameter diantaranya empat variasi kecepatan putaran spindle, dua variasi feedrate, tiga variasi depth of cut. Hasil yang akan didapat dari penelitian ini adalah untuk mengetahui reduksi respon getaran yang paling optimal dari seluruh variasi panjang damper rod dan variasi material damper rod yang digunakan. Berdasarkan simulasi yang telah dilakukan, semakin panjang damper rod maka semakin besar kemampuan damper rod dalam mereduksi respon getaran pada boring bar. Selain itu, reduksi respon getaran juga dipengaruhi oleh nilai frekuensi natural dan frekuensi chatter. Sehingga, penting untuk menyesuaikan cutting parameter yang akan digunakan pada sistem. Terdapat beberapa hal yang dapat memengaruhi respon getaran dari boring bar. Kemudian, semakin besar variasi depth of cut dan feedrate maka semakin besar pula respon getaran yang ditimbulkan. Di sisi lain, semakin besar variasi putaran spindle maka semakin kecil respon getaran yang ditimbulkan. Pada penelitian ini didapatkan bahwa customized boring bar 1 dengan panjang damper rod 254 mm dan material damper rod leaded brass memiliki nilai reduksi respon getaran tertinggi yaitu 33,47% pada sumbu-x, 43,50% pada sumbu-y, 13,39% pada sumbu-z. Sementara itu, customized boring bar 1 merupakan variasi geometry dengan operasi paling baik karena mampu mereduksi getaran pada variasi cutting parameter terbanyak dibandingkan variasi boring bar lain yakni pada 24 dari 24 cutting parameter.
======================================================================================================================================
Lathes can be used to enlarge a hole with a specific diameter using a single-edged cutting tool called a boring bar. During the machining process, excessive vibrations often occur, which can reduce the quality of the specimen and affect the performance of the drilling process. One way to dampen vibrations in the lathe machine is by adding a damper rod to the boring bar. In this final project research, a simulation using ANSYS software was conducted to design a boring bar mechanism with a damper rod that can reduce vibrations in the boring process. The simulation was performed on a model previously designed using Solidworks software. The boring bar is made of EN31 Steel material with a diameter of 25 mm and a body length of 254 mm. The damper rod is placed inside the boring bar with a diameter of 10 mm and has four different lengths: 254 mm, 190.5 mm, 127 mm, and 63.5 mm. It also has three different materials: Naval Brass, Muntz Metal, and Leaded Brass. The simulation was conducted with variations in cutting parameters, including four spindle rotation speed variations, two feedrate variations, and three depth of cut variations. The purpose of this research is to determine the optimal reduction in vibration response from all variations of damper rod length and material used. Based on the conducted simulations, it was found that the longer the damper rod, the greater its ability to reduce vibration response in the boring bar. Furthermore, the reduction in vibration response is also influenced by the natural frequency and chatter frequency values. Therefore, it is important to adjust the cutting parameters to be used in the system. Several factors can affect the vibration response of the boring bar. Additionally, the larger the depth of cut and feedrate variations, the greater the vibration response generated. On the other hand, the larger the spindle rotation speed variation, the smaller the vibration response generated. This research found that the customized boring bar 1 with a damper rod length of 254 mm and a leaded brass damper rod material has the highest reduction in vibration response, which is 33.47% in the x-axis, 43.50% in the y-axis, and 13.39% in the z-axis. Meanwhile, customized boring bar 1 is the best-performing geometry variation as it is able to reduce vibrations in the largest number of cutting parameter variations, specifically in 24 out of 24 cutting parameters.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Boring bar, Damper Rod, Respon Getaran, Vibration Response |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Visa Ramanitya Riyadini |
| Date Deposited: | 01 Aug 2023 06:02 |
| Last Modified: | 01 Aug 2023 06:02 |
| URI: | http://repository.its.ac.id/id/eprint/100125 |
Actions (login required)
 |
View Item |