DESAIN BURNISHING BALL TOOLS MESIN BUBUT MENGGUNAKAN PEGAS SEBAGAI PARAMETER GAYA TEKAN PADA BENDA KERJA

RENALDI APRILIAN SIDIK, . (2025) DESAIN BURNISHING BALL TOOLS MESIN BUBUT MENGGUNAKAN PEGAS SEBAGAI PARAMETER GAYA TEKAN PADA BENDA KERJA. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Penelitian ini bertujuan merancang dan menganalisis alat burnishing ball pada mesin bubut konvensional dengan memanfaatkan pegas sebagai sumber sekaligus indikator gaya tekan. Desain alat dibuat minimalis agar mudah diproduksi menggunakan mesin konvensional seperti bubut dan milling tanpa harus memerlukan CNC. Pegas digunakan sebagai penekan sekaligus indikator gaya melalui perubahan panjang yang dikalibrasi ke satuan kilogram. Simulasi Finite Element Analysis (FEA) dilakukan pada komponen utama seperti main holder, bottom cover, pin, pusher plate, dan bola baja, dengan beban uji 500 N (lebih tinggi dari beban aktual 300 N). Hasil simulasi menunjukkan tegangan von Mises jauh di bawah yield strength material, perpindahan sangat kecil, dan nilai factor of safety tinggi, menunjukkan struktur aman dan kaku. Uji pegas ASTM A229 menunjukkan sifat elastis dan tahan beban berulang, didukung perhitungan konstanta pegas, tegangan geser, dan jumlah lilitan aktif. Evaluasi pada bearing, baut, dan penopang berbentuk L menunjukkan umur pakai panjang dan ketahanan terhadap beban. Secara keseluruhan, desain alat ini dinyatakan aman, ekonomis, dan layak digunakan, serta berpotensi dikembangkan untuk aplikasi permukaan luar dan dalam dengan sistem tekanan lebih presisi. ***** This research aims to design and analyze a burnishing ball tool for use on conventional lathe machines, utilizing a spring as both the source and indicator of the applied compressive force. The tool is designed with a minimalist concept to facilitate manufacturing using standard machining processes such as turning and milling, eliminating the need for CNC machines. The spring serves not only as a pressing element but also as a force indicator, calibrated based on its change in length and expressed in kilograms. Finite Element Analysis (FEA) was conducted on the main components—including the main holder, bottom cover, pin, pusher plate, and steel ball—under a test load of 500 N, which exceeds the actual operational load of 300 N. The simulation results indicate that the von Mises stress values remain significantly below the yield strength of the materials, with minimal displacement and high safety factors, demonstrating structural integrity and stiffness. The ASTM A229 spring exhibited excellent elasticity and durability under repeated loading, supported by calculations involving spring constant, shear stress, and the number of active coils. Further evaluations of the bearing, bolts, and L-shaped support structure confirmed their long service life and load-bearing capability. Overall, the tool design is deemed structurally safe, cost-efficient, and suitable for practical application, with potential for further development in both internal and external surface finishing using more precise pressure control systems.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr.Sugeng Priyanto, M.Sc. ; 2). Dr.Eko Arif Syaefudin, M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Mesin, Mekanika Teknik Teknologi dan Ilmu Terapan > Manufaktur
Divisions:	FT > D IV Teknologi Rekayasa Manufaktur
Depositing User:	Users 28288 not found.
Date Deposited:	05 Aug 2025 02:27
Last Modified:	05 Aug 2025 02:27
URI:	http://repository.unj.ac.id/id/eprint/57796

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