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All Journal BULLET : Jurnal Multidisiplin Ilmu
Siddiq Mirza, Amirul
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Humanities Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Nursing

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Rancang Bangun Alat Bantu Pres Proses Hemming Untuk Mendukung Kerja Pelat Pada Praktikum Fabrikasi Kurrohman, Taufik; Siddiq Mirza, Amirul; Widiantoro, Heri
BULLET : Jurnal Multidisiplin Ilmu Vol. 4 No. 3 (2025): BULLET : Jurnal Multidisiplin Ilmu
Publisher : CV. Multi Kreasi Media

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Plate working practicum is one of the learning activities in the Mechanical Engineering Department, Bandung State Polytechnic. The use of practicum tools can facilitate students and lecturers in carrying out these activities. The problem encountered during plate working practicum is the limited availability of tools to press the edges of prism-shaped workpieces made by students. This leads students to use alternative tools such as plate bending tools, clamps, and hammers, which are less effective as they take longer and risk damaging the material due to uneven pressure. Based on this issue, the design and creation of a pressing tool is necessary to support the plate working practical activity. The mechanism of this tool uses the pressing force of a punch to shape or cut the workpiece according to the desired form and size. The design of this tool uses the Pahl & Beitz method, considering safety, ease of use, and ease of manufacturing. The final specifications of the press tool have dimensions of 300x250x253 mm, a tool weight of 47.3 kg, and a tool capacity to press plates up to 1 mm thick. Tests were conducted on ST37 steel plates with a thickness of 1 mm and plates with a thickness of 0.5 mm, demonstrating that the press tool can function effectively in the hemming process, both on 1 mm thick plates and prism-shaped workpieces.
Perancangan Mesin Vibration Deburring Untuk Penghalusan Sudut Tajam Pada Benda Kerja Logam Di PT.XYZ Dwi Prasetya, Yuhana; Siddiq Mirza, Amirul; Nur Hakim, Luqman
BULLET : Jurnal Multidisiplin Ilmu Vol. 4 No. 6 (2025): BULLET : Jurnal Multidisiplin Ilmu (INPRESS)
Publisher : CV. Multi Kreasi Media

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Machining processes such as cutting, drilling, and grinding often leave burrs on workpiece edges that can reduce surface quality, disrupt assembly, and pose safety risks. Therefore, an effective and efficient finishing method is required to remove these burrs. This study aims to design a vibration deburring machine capable of removing burrs while improving the surface quality of machined workpieces. The design method includes a literature review and analysis of existing products as design references, identification of functional requirements and technical specifications, calculation of main components, and mechanical and frame structure design. The proposed vibration deburring machine is driven by a three-phase electric motor with a rotational speed of 3000 RPM and a power of approximately 1 kW. The deburring tank is designed with dimensions of 700 × 440 × 400 mm, enabling the processing of ten or more workpieces in a single cycle. The machine frame is constructed from ASTM A36 steel with a yield strength of 250 MPa. Structural analysis shows that under a maximum load of 300 kg, the highest stress in the lower frame reaches 69.5 MPa, which is well below the material’s yield limit. Based on these results, the designed vibration deburring machine meets operational and structural strength requirements. This design is expected to serve as an alternative solution and reference for vibration-based finishing machines in industrial manufacturing applications. The machine is suitable for small-scale manufacturing.
Co-Authors Dwi Prasetya, Yuhana Heri Widiantoro Nur Hakim, Luqman Taufik Kurrohman