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All Journal Jurnal Simetris Rekayasa Mesin Jurnal Teknologi Terapan Industrial Research Workshop and National Seminar
Rahmi, Meri
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Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Other

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Journal : Rekayasa Mesin

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Pengaruh Proses Bubut Baja AISI 4140 terhadap Mental Workload dengan Metode NASA-TLX Rahmi, Meri; Rachmatullah, Rachmatulllah; Sukardi, Casiman
Jurnal Rekayasa Mesin Vol 12, No 2 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.02.13

Abstract

This study aims to analyze the mental workload with the experimental method when operating a lathe under two different conditions, namely by using cooling and without cooling. The material used as the specimen in this research is AISI 4140 material. Another important variable is the timing of the experiment in the morning and evening. This is related to the division of work shifts that often occurs in the manufacturing industry. The working time factor greatly affects work performance and vigilance at work. Based on the experimental results taken from 20 participants and processed with the NASA-TLX method, it shows that the mental workload in the lathe process with the addition of cooling is more significant than the lathe process without the addition of cooling, even though the data collection time is different. It is also directly proportional to the duration of the lathe process. So it can be concluded that the turning process is better to use cooling even on AISI 4140 Steel material because it does not require a high workload.
ANALYSIS OF THE CUTTING BLADE FOR HDPE AND PET PLASTIC BOTTLE SHREDDERS FOR 3D PRINTING FILAMENT EXTRUSION Adhiharto, Riky; Mandayusdi , Cahya Ramdan Putra; Rahmi, Meri
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.1950

Abstract

The increasing use of filaments for 3D printing encourages the use of suitable plastic waste as a raw material for filaments. In Indonesia, plastic waste will reach 26.2 million tons in 2023, with 18.47% of it being plastic. To process plastic waste such as PET (Polyethylene Terephthalate) and HDPE (High Density Polyethylene) into filaments, maximum size of shredding is 2 mm. This study aims to design a plastic shredding machine using the VDI 2222 (Verein Deutscher Ingenieure) method. This machine is powered by an AC electric motor that rotates a pulley to drive the blade, using a shredder and granulator cutting type. This machine is expected to be able to shred PET and HDPE plastic with a thickness of 0.3–2 mm. The results of the study are in the form of a plastic shredding machine design with dimensions of 1682 x 898 x 791 mm.
Co-Authors Adhiharto, Riky Agus Hidayat Badruzzaman Badruzzaman Delffika Canra Hakim, Adies Rahman Hariri, Eri Hasan Haris, Emin Heni Pujiastuti Mandayusdi , Cahya Ramdan Putra Rachmatullah, Rachmatulllah Rafiq, M. Wildan A. Sukardi, Casiman Suliono Suliono Suwandi, Dedi Suwandi, Dedi