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All Journal Rotasi Rekayasa Mesin
Atmadi, Priyono
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Mechanical Engineering

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Analisa Perkembangan Struktur Aluminum (AC2B) dengan Pengaruh Penambahan Stronsium pada Part Transmisi Sub Assy Menggunakan Metode Pengecoran Gravity Dies Casting Antonius, Dikky; Budiarto, Budiarto; Atmadi, Priyono; Pratama, Rakha Anugrah
Rekayasa Mesin Vol 10, No 3 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.03.4

Abstract

Recently, one of the problems faced by the automotive industry is the frequent failure parts produced by casting processes such as uncomplete filling, low mechanical properties, shrinkage (non-uniform shrinkage), and porosity. In this research, the modification method with the addition of strontium while aluminum being melted is held. This experiment was made to solve either the shrinkage problem or porosity. The improvement of the mechanical properties of aluminum also become one of the purposes of the experiment. The concentration of strontium added was 0 wt.% Sr, 0.005wt.% Sr, 0.0075wt.% Sr, and 0.01 wt.%. The results show that the increased Sr content on AC2B will increase the mechanical properties, while the optimum value occurred by addition value 0.01wt. % Sr. However the results also show that the concentration of strontium has no effect on reducing shrinkage porosity, and can reduce the size of aluminum dendrites.
Desain Mekanisme Ballscrew untuk Retrofit Drilling axis Mesin Ficep H-Beam Drilling LFB-200-49 Turnip, Kimar; Atmadi, Priyono; Novianto, Andreas Agung
ROTASI Vol 23, No 2 (2021): VOLUME 23, NOMOR 2, APRIL 2021
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.23.2.22-28

Abstract

The retrofit process is the process of replacing or adding a component to a machine with the aim of adding value to the machine's performance. In this study, the retrofit process was applied to the replacement of the Ficep H-beam Drilling LFB-200-49 drilling machine axis. This retrofitting process requires a servo motor component as driving energy and a ballscrew to convert the motor rotation into a linear twist drill motion during the drilling process to replace the hydraulic system used previously. In the retrofit design carried out on the Ficep H-beam Drilling machine, the thrust generated by the hydraulic system is used as a reference to determine the dynamic load requirements that must be transmitted by the ballscrew while the thrust axial force from the drill bit is used as a reference in determining the power of the servo motor. In designing the replacement of the hydraulic system to this servo motor system, the recommended components are a ballscrew with a pitch of 10 mm and a ballscrew shaft diameter of 38 mm which meets the requirements for dynamic load transmission of 50,210.56 N and a servo motor with a power of 8.12 kW with the addition of a gear ratio of 3. : 1.
Co-Authors Antonius, Dikky Budiarto Budiarto Kimar Turnip, Kimar Novianto, Andreas Agung Pratama, Rakha Anugrah