Perancangan Struktur Rangka Mesin Bending Drag Link Bus Fe-74 Dan Fe-84 (Studi Kasus Di PT. Bagong Dekaka Makmur-Malang)

Febrian, Tio Indra (2025) Perancangan Struktur Rangka Mesin Bending Drag Link Bus Fe-74 Dan Fe-84 (Studi Kasus Di PT. Bagong Dekaka Makmur-Malang). Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini membahas perancangan struktur rangka mesin bending drag link untuk bus FE-74 dan FE-84 di PT. Bagong Dekaka Makmur. Mesin bending lama masih menggunakan sistem hidrolik manual dengan waktu proses ±10 menit per unit dan hasil bending yang kurang presisi akibat deformasi penampang. Tujuan penelitian adalah merancang mesin bending baru dengan sistem hidrolik kapasitas 46 ton yang mampu meningkatkan produktivitas, presisi, dan kekuatan struktur. Metodologi meliputi studi literatur, observasi lapangan, pengujian tarik material pipa baja seamless (OD 38,1 mm, ID 22,1 mm, tebal 8 mm), perhitungan gaya bending menggunakan teori defleksi, analisis momen inersia, modulus elastisitas, springback, tegangan geser, tegangan bending, dan tegangan Von Mises. Desain komponen dilakukan dengan CAD SolidWorks, meliputi frame, punch, die, stopper, dan adaptor. Hasil penelitian menunjukkan gaya bending maksimum dapat ditangani oleh struktur rangka dengan tegangan kerja di bawah tegangan izin. Mesin baru mampu meningkatkan kecepatan produksi hingga dua kali lipat dan menghasilkan bending yang lebih presisi. Rancangan ini diharapkan menjadi acuan pengembangan mesin bending dengan kapasitas serupa di industri otomotif.
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This study discusses the design of a frame structure for a drag link bending machine for FE-74 and FE-84 buses at PT. Bagong Dekaka Makmur. The existing bending machine still uses a manual hydraulic system with a processing time of approximately 10 minutes per unit and produces less precise bending results due to cross-sectional deformation. The objective of this research is to design a new bending machine with a 46-ton hydraulic system capable of improving productivity, precision, and structural strength. The methodology includes literature review, field observation, tensile testing of seamless steel pipe material (OD 38.1 mm, ID 22.1 mm, thickness 8 mm), calculation of bending force using deflection theory, analysis of moment of inertia, modulus of elasticity, springback, shear stress, bending stress, and Von Mises stress. Component design was carried out using SolidWorks CAD, including the frame, punch, die, stopper, and adapter. The results show that the maximum bending force can be supported by the frame structure with working stress remaining below the allowable stress. The new machine is capable of doubling production speed and producing more precise bending results. This design is expected to serve as a reference for the development of bending machines with similar capacity in the automotive industry.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Struktur Rangka, Mesin Bending, Drag Link, Bus FE-74 dan FE-84, Frame Structure, Bending Machine, Drag Link, FE-74 and FE-84 Buses
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials. T Technology > TA Engineering (General). Civil engineering (General) > TA660.F7 Structural frames. T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design T Technology > TS Manufactures > TS280 Pipe Bending, Tube Bending
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Tio Indra Febrian
Date Deposited:	08 Aug 2025 06:38
Last Modified:	08 Aug 2025 06:38
URI:	http://repository.its.ac.id/id/eprint/127994

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