Nafi, Muhammad Mangaraja (2022) Permodelan Dan Analisa Reduksi Getaran Turning Tool Pada Proses Permesinan Akibat Pengaruh Dari Variasi Bentuk Dynamic Vibration Absorber (DVA). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Mesin bubut adalah mesin perkakas yang digunakan untuk
memotong dan memakan benda kerja oleh pahat yang digerakan
secara translasi dengan sumbu putar dari meja kerja. salah satu proses pada mesin bubut adalah turning, turning merupakan proses permesinan yang biasa dilakukan pada mesin bubut dimana pahat bermata potong tunggal pada mesin bubut bergerak memakan benda kerja yang berputar, dalam hal ini pahat bermata potong tunggal adalah gerak potong dan gerak translasi pahat adalah gerak makan.Setiap peralatan mekanis dan mesin-mesin pada umumnya akan mengalami getaran ketika proses turning. Efek getaran ini juga mempengaruhi kinerja turning tool dalam melakukan pengurangan material, dan menyebabkan keuasan pada part – part mesin serta mengurangi performa akurasi pemotongan. tetapi dapat diminimalisasi dengan cara-cara tertentu seperti menambahkan
dynamic vibration absorber pada cutting tool mesin bubut.
Penelitian tugas akhir ini melakukan rancangan DVA dengan
insert dan layer rubber serta massa dengan variasi bentuk silinder dan rectangular pada nose tool di turning tool. Dalam penelitian ini penulis membuat rancangan 3 variasi bentuk DVA dengan 2 diantara 3 massa adalah sama beserta 3 variasi insert yang berbeda, 2 insert mengikuti bentuk dari massa logam dan 1 insert berupa layer sebagai pelapis pada sisi kanan dan kiri permukaan massa DVA. Variasi permesinan yang digunakan meliputi variasi putaran spindle (N), Dept of cut (D), dengan satu variabel tetap permesinan yaitu frekuensi operasional (ωc).
Hasil dari simulasi turning tool, didapatkan respon getaran di range frekuensi operasional 367 Hz – 580 Hz dengan perbandingan amplitude terbesar pada turning tool regular tanpa DVA untuk arah axial serta respon getaran terbesar pada variasi bentuk DVA adalah DVA silinder untuk arah tangential. DVA rectangular dan rectangular layer mendapatkan respon getaran yang tidak jauh berbeda pada range frekuensi operasional yang ditetapkan. Semakin besar depth of cut dan putaran spindle maka respon getaran turning tool dengan dan tanpa DVA akan semakin besar. Pada penelitian ini didapatkan persentase reduksi getaran terbesar pada turning tool dengan DVA silinder pada frekuensi operasional 500 Hz dengan depth of cut 0,4 mm sebesar 71,40%, untuk DVA rectangular sebesar 81.81% di frekuensi operasional 500 Hz dengan kecepatan spindle 160 Rpm depth of cut 1,2 mm, serta untuk DVA rectangular layer didapatkan hasil reduksi getaran 81.11% pada frekuensi operasional 500 Hz saat depth of cut 1,2 mm. Didapatkan kemampuan prosentase reduksi getaran oleh tiap variasi bentuk DVA, kemampuan terkecil ada pada DVA silinder sebesar 66,35%. Untuk DVA rectangular layer memilik kemampuan mereduksi sebesar 77,64%. Reduksi getaran terbesar ada pada DVA rectangular dengan kemampuan mereduksi 78,66% Turning tool DVA silinder, DVA rectangular dan rectangular layer aman untuk digunakan pada berbagai parameter permesinan tetapi sangat optimal di frekuensi 500 Hz dengan kecepatan spindle 160 Rpm dan depth of cut 1,2 mm.
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A lathe is a machine tool used to cut and eat the workpiece by a tool that is moved translationally with the rotary axis of the worktable. One of the processes on a lathe is turning. Turning is a machining process usually done on a lathe where the single-edged chisel on the lathe moves to eat the rotating workpiece. In this case, the single-edged chisel is the cutting motion, and the translational motion of the chisel is motion eating. Every mechanical equipment and machine, in general, will experience vibration during the turning process. This vibration effect also affects the performance of turning tools in reducing material, causes wear on machine parts and reduces cutting accuracy performance. Nevertheless, it can be minimized in specific ways, such as adding a dynamic vibration absorber to the lathe cutting tool.
This final project research is to design DVA with insert and layer rubber and mass with variations in a cylinder and rectangular shape on the nose tool in the turning tool. In this study, the authors designed three variations of DVA shape with two of the three masses being the same along with three different insert variations, two inserts following the shape of the metal mass, and one insert in the form of a layer as a coating on the right and left sides of the DVA mass surface. The machining variations used include variations in spindle rotation (N), Dept of cut (D), with one fixed machining variable, operating frequency (ωc).
The results of the turning tool simulation obtained a vibration response in the operational frequency range of 367 Hz – 580 Hz with the most significant amplitude ratio in regular turning tools without DVA for the axial direction, and the most significant vibration response in the variation of DVA shape is cylindrical DVA for the tangential direction. Rectangular and rectangular DVA layers get a vibration response that is not much different in the specified operating frequency range. The greater the depth of cut and spindle rotation, the greater the vibration response of the turning tool with and without DVA. In this study, the most significant percentage of vibration reduction in turning tools with cylindrical DVA at an operational frequency of 500 Hz with a depth of cut of 0.4 mm is 71.40%, for a rectangular DVA of 81.81% at an operational frequency of 500 Hz with a spindle speed of 160 Rpm depth. Of cut 1.2 mm, and for the DVA rectangular layer, the results of the vibration reduction are 81.11% at an operational frequency of 500 Hz when the depth of cut is 1.2 mm. The ability of the percentage of vibration reduction obtained by each variation of the DVA form, the slightest ability is in the cylinder DVA of 66.35%. For DVA rectangular layer can reduce by 77.64%. The most considerable vibration reduction is rectangular DVA, which can reduce 78.66%. Turning tool DVA cylinder, DVA rectangular and rectangular layer are safe for use on various machining parameters but are very optimal at a frequency of 500 Hz with a spindle speed of 160 Rpm and a depth of cut 1.2 mm
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Turning tool, Dynamic Vibration Absorber (DVA), Respon Getaran, reduksi, Vibration Response, reduction |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ1185 Metal-cutting--Problems, exercises, etc. T Technology > TJ Mechanical engineering and machinery > TJ1186 Metal-cutting tools. 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: | Muhammad Mangaraja Nafi |
| Date Deposited: | 19 Feb 2022 02:45 |
| Last Modified: | 01 Nov 2022 03:34 |
| URI: | http://repository.its.ac.id/id/eprint/94619 |
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