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All Journal Infotekmesin Jurnal Teknologi dan Rekayasa Alat Berat (JTRAB)
Galuh Bahari
Universitas Gadjah Mada
Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Evaluasi Efisensi Riser Untuk Bentuk Riser Samping yang Berbeda Menggunakan Metode Simulasi Casting Galuh Bahari; Benidiktus Tulung Prayoga
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1930

Abstract

As the solidification reaches the hot spot area, no molten metal remains and shrinkage is formed. To anticipate the shrinkage, a riser is added to the casting system. An optimal riser design would produce free shrinkage components. One of the factors that affect riser efficiency is the riser shape. This study aims to find the most efficient side riser shape by using simulation software. The riser shape of tubes, tubes with a half sphere on top, hemispheres, conical tubes, tubes with an oval cross-section, and cubes are used in this experiment, with the volume of all risers kept constant. The most efficient shape of the riser is the tube. The tube riser produces a larger modulus. The tube riser generated directional solidification. The same pattern can be seen in the niyama criteria and solidification temperature, where the tube riser has a more continuous pattern compared to other riser shapes.
Perancangan Mesin Kempa Panas Bambu Laminasi dengan Sistem Pemanas Elektrik Terintegrasi dan Pengempaan Hidrolik Radhian Krisnaputra; Galuh Bahari; Ilham Ayu Putri Pratiwi; Aris Hendaryanto; Sugiyanto Sugiyanto; Inggar Septhia Irawati; Ragil Widyorini
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Most laminated bamboo production processes in small and medium-sized industries still rely on cold pressing, which requires long pressing times and often results in inconsistent bonding quality. This study aims to design a hot press machine by integrating a hydraulic pressing system, an electric heating system, and temperature distribution analysis using Computational Fluid Dynamics (CFD). The pressing system employs four hydraulic cylinders with a capacity of 15 tons and a maximum operating pressure of 110 bar, while the heating system requires 5.13 kW of power. CFD simulation results indicate a relatively uniform temperature distribution across the primary heating zone, although temperature gradients occur near the edges due to heat loss and the low thermal conductivity of bamboo. The proposed design satisfies the technical requirements of the laminated bamboo manufacturing process and has the potential to improve pressing uniformity and product quality, providing a foundation for the development of hot press machines for small- and medium-scale laminated bamboo industries.
Analisa Performa Tekanan dan RPM Pada Komponen Swing Hidrolik Pada Alat Peraga Mini Excavator Angga Prasetio Aji; Galuh Bahari; Felixtianus Eko Wismo Winarto; Braam Delfian Prihadianto
Jurnal Teknologi dan Rekayasa Alat Berat Vol 1 No 1 (2024): JTRAB Volume 1, No 1, 2024
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v1i1.8929

Abstract

A learning method is essential to achieve the existing curriculum standards. For success in the learning process, media or teaching aids are needed to enhance the process and learning outcomes related to students' levels of thinking (Suwardi et al., 2014). The mini excavator trainer serves as one of the solutions to support learning in hydraulic systems. The development of the hydraulic swing component is intended to improve the components of the mini excavator trainer, which will later be developed into a teaching aid for hydraulic drive systems. The ultimate goal of this research is to create a hydraulic swing component to be installed on the mini excavator trainer and, finally, to determine the pressure and RPM performance of the hydraulic swing component. Based on the research conducted, operating the mini excavator trainer requires a radius dimension or distance from the center point to the warning line of 3 m², with a maximum pressure of 150 kgf/cm² producing 11.17 RPM, while the allowable pressure to operate the hydraulic swing component on the mini excavator trainer is 100 kgf/cm², producing 8.54 RPM.
Co-Authors Angga Prasetio Aji Benidiktus Tulung Prayoga Felixtianus Eko Wismo Winarto Ignatius Aris Hendaryanto Ilham Ayu Putri Pratiwi Inggar Septhia Irawati Prihadianto, Braam Delfian Radhian Krisnaputra Ragil Widyorini Sugiyanto Sugiyanto