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All Journal Jurnal Rekayasa Mesin Eksergi: Jurnal Teknik Energi Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Jurnal Polimesin
Sai'in, Ali
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Variasi Frekuensi pada Electric Rotary Table Berbasis Inverter Guna Menurunkan Cycle Time dan Cacat Produk pada Pengelasan Pipa Kapiler Nailul Ulum, Muhammad Showi; Prasetyo, Nanang Budi; Sai'in, Ali; Su'udy, Ahmad Hamim; Hamid, Abdul; Purnomo, Dwi
Jurnal Rekayasa Mesin Vol. 18 No. 3 (2023): Volume 18, Nomor 3, Desember 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i3.5082

Abstract

Abstract  Cycle Time is a matter that must be considered in production time, a good Cycle Time will support the targets that must be met, even if Cycle Time decreases, production will also increase and company turnover will also Increase. In the case study of PT Arisamandiri Pratama, one of its productions is in the form of AC parts, namely capillary pipes which still use a manual rotating table to rotate the pipe to be welded so that it is unable to reach the target of 800 parts / hour with an average Not Good product of 93 parts / day. The design of an inverter-based electric rotary table can reduce cycle time, but how much frequency will affect the results of a welding, not that the faster the welding process the better, the faster the welding will affect the vibration of the table machine which will have an impact on the welding results. By experiment the inverter frequency setting is expected to get a frequency value with maximum speed but no vibration on the rotation table, the frequency used is between 700 Hz to 1500 Hz with an interval of 100 Hz. The experimental results show that the best frequency is 1000 Hz, with a rotation speed of 16 rpm with a production capacity of 935 parts / hour with Not Good products of 59 parts / day or a decrease in Not Good products by 42.1% per day
Analisa Pembebanan pada Bilah Pengaduk dan Poros Utama pada Mesin Pencampur Pupuk Majemuk dengan Sofware SOLIDWORK Suherman, Suherman; Abdullah, Ilmi; Suharlan, Didy; Sai'in, Ali; Harahap, Muchsin
Jurnal Rekayasa Mesin Vol. 19 No. 1 (2024): Volume 19, Nomor 1, April 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i1.5363

Abstract

A compound fertilizer mixing machine (mixer) is a type of machine used to produce compound fertilizer. This fertilizer consists of a mixture of humus fertilizer, animal manure and humus soil. This machine is very important in its use as a mixer of different types of fertilizer ingredients, so as to produce a homogeneous mixture. The aim of this research is to design a fertilizer mixing machine that can be used by small and medium industries and farmer groups. In this design, consider the factors that influence the strength of the main components, such as the drive shaft, mixing blade, belt transmission system, machine frame, etc. This research was carried out in three stages, namely the load simulation stage on the drive shaft and stirrer blade to determine the safety factor. The second stage is calculations in the design of the main components of the machine. In the final stage, the process of making the machine and testing is carried out. The design of this machine was simulated using SOLIDWORK 20 software. The simulation results using SOLIDWORK showed a minimum FOS (Factor of Safety) value of 2.98 on the stirrer blade and the main shaft had met the safety factor. The test results of this fertilizer mixing machine have a capacity of 950 kg/hour.
Optimization of cutting current in CNC plasma cutting for improved bracket fabrication quality Sai'in, Ali; Yudha, Venditias; Al Huda, Luqman; Abidin, Zaenal; Prawibowo, Hartanto
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8618

Abstract

CNC plasma cutting is widely used in metal fabrication due to its efficiency and versatility; however, parameter optimization is essential to ensure high-quality results. This study investigates the influence of CNC plasma cutting parameters affect the fabrication quality of Revo motorcycle brackets, which are essential for electric motor vehicle conversion. We conducted experiments on 6 mm thick low-carbon steel plates using a JIAXIN JX-1530 machine. The electric current was varied at 50, 52, 54, and 56 A. For each current level, four specimens were prepared and tested while keeping other parameters constant: a cutting speed of 600 mm/min, a gas pressure of 6 bar, and a torch distance of 1–2 mm. We assessed cut quality based on surface roughness (Ra) at two measurement points, dimensional accuracy relative to CAD design, and hardness variations in the Heat-Affected Zone (HAZ) and base material. The results showed that the best conditions were achieved at 50 A, 6 bar gas pressure, and a torch distance of 2 mm, resulting in an average Ra of 5.39 µm and a dimensional deviation of ±0.3 mm. Although increasing the current above 50 A improved HAZ hardness, it negatively impacted surface roughness and increased the risk of thermal defects. These findings indicate that the identified optimal parameters support the production of high-precision, cost-effective brackets.
Co-Authors Abdul Hamid Abdullah, Ilmi Ahmad Hamim Su’udy Al Huda, Luqman Aulia, Nur Fatowil Bahri, Nisfan Carli Carli Daryadi Daryadi Dwi Purnomo Eko Saputra Eko Saputra Hardian, Rudino Tuqo Hartono Hartono Hermawan, Baktiyar Mei Indrawati, Ragil Tri Muchsin Harahap Muzaki, Mochamad Nailul Ulum, Muhammad Showi Nanang Apriandi Prasetyo, Nanang Budi Prawibowo, Hartanto Putri, Farika Tono Rahmawaty, Rahmawaty Safriana, Eni Sarjianto, Sarjianto Setiyawan, Trio Suharlan, Didy Suherman Suherman, Suherman Sunarto Sunarto Surya Aditama Surya Dharma Syamsul Arifin Wahyu Isti Nugroho Yanuar Mahfudz Safarudin Yudha, Venditias Zaenal Abidin