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All Journal Traksi : Majalah Ilmiah Teknik Mesin Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin FLYWHEEL : Jurnal Teknik Mesin Untirta Teknika: Jurnal Sains dan Teknologi Prosiding Semnastek Turbo : Jurnal Program Studi Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Teknik Mesin Indonesia Dinamis Suara Teknik : Jurnal Ilmiah Jurnal Polimesin
Riki Effendi
Universitas Muhammadiyah Jakarta
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Journal : Dinamis

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ANALISIS KARAKTERISTIK MATERIAL ELEKTRODA TIP UNTUK PROSES LAS TITIK PADA BODI MOBIL UNTUK RANGKA MEMPERPANJANG UMUR PAKAI Effendi, Riki; Hendra, Franka
DINAMIS Vol. 10 No. 2 (2022): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v10i2.10748

Abstract

One of the important components in the process of spot welding or spot welding is electrode tip or better known as”eltip". The quality of eltip material will greatly determine the welding results, the level of reliability and service life of eltip. The purpose of this study was to analyze the characteristics of eltip and find a suitable formulation of locally produced eltip to replace imported eltip. The chemical composition of the eltip material that is currently used is unknown and is a secret for import manufacturers. Local production Eltip used spot welding process has a disadvantage in service life. For this reason, chemical composition tests, hardness tests, and metallographic tests were carried out on the tip electrode. In the results of spot welding metallographic test and tark test, the results showed a minimum nugget diameter of 3 mm for 1 mm thick welding plate, can be met between 3.22 mm to 3.52 mm by local eltip. The service life of local eltip as many as 2000 spots is approaching the service life of imported eltip as many as 2400 spots. A slight improvement in Pb levels as an anti-wear will increase the service life of this local eltip in subsequent use. With reference to the quality standards of the Weld, such as the dimensions of the nugget, and visual check welding surface defects allowed by the car manufacturer, the results of this study are expected to be a reference for the use of eltip in the welding process elsewhere.
Analysis of The Frame Design of Cracker Sheet Printing and Cutting Machine Using Finite Element Method Simulation Effendi, Riki; Pratama, Rikardo; Qadri, Munzir; Yunus Nasution, Ahmad
DINAMIS Vol. 12 No. 1 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i1.16359

Abstract

The food industry continues to evolve and faces challenges in enhancing production efficiency. One product that has garnered significant attention is crackers, which have high global demand. Manual processes involved in printing and cutting cracker sheets result in time and labor wastage, leading to production limitations and reducing the industry's competitiveness. Therefore, this research aims to analyze the design framework of a cracker sheet printing and cutting machine using finite element method simulation. The research methodology involves 3D modeling of the machine framework, selection of appropriate materials, and configuration of finite element method simulation to understand the structural behavior of the machine. The research findings identify critical areas requiring design improvements to enhance machine reliability and operational efficiency. By leveraging automatic cutting technology, this research is expected to enhance cracker production efficiency, reduce production costs, and improve the competitiveness of local food industries in the global market. Using cracker sheet printing and cutting machines, cracker production can be significantly enhanced compared to manual processes. These findings make a significant contribution to improving production efficiency and the competitiveness of the food industry.
Power Optimisation of Centrifugal Pumps in a 4-Storey Building Effendi, Riki; Rijal Siswanto, Ahmad; Qadri, Munzir; Hendra, Franka; Yunus Nasution, Ahmad
DINAMIS Vol. 13 No. 1 (2025): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v13i1.18837

Abstract

The optimization of water distribution systems in high-rise buildings is essential for enhancing energy efficiency and reducing operational costs. This study examines the effects of implementing a Variable Frequency Drive (VFD) on a centrifugal pump system within a four-storey high-rise building at PT SBA. A case study approach was employed to measure key operational parameters—namely, electrical power consumption, water flow rate, and pressure distribution—both before and after VFD installation. The experimental results demonstrate that the VFD application resulted in a 20% reduction in power consumption, decreasing from 3.5 kW to 2.8 kW, while the water flow rate improved by 12.5%, rising from 80 LPM to 90 LPM. In addition, the pressure range was significantly stabilized, narrowing from 1.2–2.5 bar to 1.0–2.0 bar across the building’s floors. An economic analysis based on the observed energy savings indicates an annual cost reduction of approximately Rp7,665,000, with a corresponding return on investment achieved in less than one year. The findings suggest that integrating VFD technology into centrifugal pump systems not only enhances operational efficiency and extends equipment lifespan by mitigating load fluctuations but also offers substantial economic benefits. This study provides a robust framework for the broader application of VFD-based optimization strategies in high-rise and industrial water distribution systems.
Co-Authors . Roslidar Adi Candra Adi Candra, Adi Ahmad Yunus Nasution Ahmad Yunus Nasution Alan - Ramadhan Aldo Dwi Widyanto Alhamdi, Muhammad Jurej Alviansyah, Dede Anthon Rudy W Aulia Rahman Aznam Barun Bambang Setiawan Dandy - Rizaldy Didin DWI SURYANTO Edi Supriyadi F Faozan Fachri Agung Fadwah - Maghfurah Fadwah Maghfurah Fadwah Maghfurah Fadwah Maghfurah Febri Irianto Franka Hendra Franka Hendra Franka Hendra Franka Hendra Sukma Gunawan Hidayat Harmanung Adi Susilo Hendra, Franka Hendro Purwono Hendro Purwono Hendro Purwono Hutasoit, Jisman Iip Muhlisin Indra Setiawan Indriyati K, Retno Izza Ubaidilah Junaedi Junaedi Junaedi, Thomas M. Arief Hakim Mochammad Nurul Aini Morhan Sirait Muchtar, Kahlil Muhammad Al Haramain Muhammad Khumaidi Muhammad Lutfi Yasid Munzir Qadri Najamudin, Muhammad Nasution , Ahmad Yunus Nasution, Ahmad Yunus Pratama, Rikardo Putra, Bhagas Novanda Rasma Rasma Rasma Rasma Rasma Rasma Rijal Siswanto, Ahmad Rini Alfatiyah Robiansyah Nur Kholik Rudiarto Rudiarto Rudiarto, Rudiarto Rusmalah, Rusmalah Ruspendi Ruspendi Ruspendi, Ruspendi Safrizal Razali Sofian Bastuti SUPRIYONO Supriyono Supriyono Taufik Taufik TH, Estiningsih Tofan Megawanto Wanto Sarwoko Windarta - Windarta Yudha Nurdin Yunus Nasution, Ahmad Z Zulpandri