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Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Polimesin mostly publishes studies in the core areas of mechanical engineering, such as energy conversion, machine and mechanism design, and manufacturing technology. As science and technology develop rapidly in combination with other disciplines such as electrical, Polimesin also adapts to new facts by accepting manuscripts in mechatronics. In Biomechanics, Mechanical study in musculoskeletal and bio-tissue has been widely recognized to help better life quality for disabled people and physical rehabilitation work. Such a wide range of Polimesin could be published, but it still has criteria to apply mechanical systems and principles. Exceeding the limitation has been a common reason for rejection by those outside the scope. Using chemical principles more than mechanical ones in material engineering has been a common reason for rejection after submission. Excessive exploration of the management within the discipline of Industrial Engineering in the manufacturing technology scope is also unacceptable. The sub-scope biomechanics that focuses on ergonomics and does not study movement involving applied force on the bio-tissue is also not suitable for submission.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 582 Documents
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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.
Impact of surface roughness on the adhesion strength of PVA/eggshell-derived hydroxyapatite coatings on AISI 316L substrates Irfa'i, Mochamad Arif; Suherman, Suherman; Firdaus, Achmad Fadjar Maulana
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.v24i2.8690

Abstract

This study investigates the effect of AISI 316L surface roughness on the adhesion Poly Vinyl Alcohol (PVA) and eggshell-derived Hydroxyapatite (HA) coatings applied via slurry spraying. The surfaces were modified by the sandblasting method resulting in a maximum roughness of 4.803 µm using 16-30 mesh SiO2 as sandblasting media. Reducing SiO2 particle size to 30-60 mesh and subsequently 60-80 mesh, gradually reduces the surface roughness to 3.431 µm and 1.712 µm, proving that smaller abrasive particles result in a smoother surface. The slurry spraying process was then done using 27:73 mass-based mixture of HA and 3% PVA solution in water. Results revealed that while sandblasting significantly altered substrate topography, the resulting coatings remained dense and pore-free with consistent thickness across all roughness levels, while maximum adhesive strength of 4.09 MPa based on ASTM D4541 method was observed in the specimen sandblasted with 30-60 mesh SiO2, corresponding to a Ra value of 3.43 µm. Utilizing sustainable eggshell-derived HA provides a bioactive, cost-effective coating material that achieves high inter facial adhesion on AISI 316L, offering a mechanically stable and affordable solution for the development of next-generation orthopedic implants.
A laboratory-scale 3-axis automated storage and retrieval system prototype for electronic component management Kusumastuti, Sri; Ulumuddin, M. Ihya’; Kumbalany, Cleva Tusara; Sihono, Sihono; Kartika, Vinda Setya; Rochmanto, Raditya Artha; Suryono, Suryono; Rizal, Aminuddin
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.v24i2.8148

Abstract

Efficient storage and retrieval of electronic components remain challenging in laboratory-scale environments due to reliance on manual handling. This study presents the development and experimental evaluation of a laboratory-scale three-axis Automated Storage and Retrieval System (ASRS) prototype designed for electronic component management. The proposed system uses a combination of servo and stepper motors to provide controlled motion along the X, Y, and Z axes. It is managed by a Programmable Logic Controller (PLC) integrated with a Human–Machine Interface (HMI). Manual operation is used for system calibration and motion adjustment, while automatic operation facilitates sequential storage and retrieval processes. We evaluated the system's performance by measuring positional accuracy and deviation at multiple target rack locations. The results show that the system achieves positioning accuracy of 84.62% - 95.38%, with absolute deviations between 0.3 and 1 cm. These findings demonstrate that the ASRS prototype is a feasible solution for effective laboratory-scale automation in storage applications and for PLC-based educational purposes.
Performance evaluation of a solar-powered thermoelectric cool box with GSM-IoT monitoring for coastal fisheries Shaffa, Shaffa; Kusumanto, RD; Taqwa, Ahmad
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.v24i2.8857

Abstract

This study develops and evaluates an autonomous solar-powered cool box to improve the storage quality of fishermen catch in the Sungsang Estuary, where limited access to ice and electricity accelerates fish deterioration. The system integrates a monocrystalline photovoltaic panel, VRLA battery, MPPT charge controller, thermoelectric cooling module, automatic solar tracking, and GSM-IoT monitoring for remote operation. Solar tracking uses LDR sensors and a wiper motor to continuously adjust panel orientation for improved solar energy capture. A 14-day field test in a maritime environment showed a maximum power output of 199.9 W and an average daily energy yield of 1,285.6 Wh. The generated energy sustained the cooling load while maintaining system voltage between 22.35 and 23.55 V under varying irradiance. Panel tilt adjustment from -30° to +32° improved solar radiation absorption throughout the day. The cool box maintained an average internal temperature of 6-8°C, with occasional short-term increases to 14-15°C caused by external ambient conditions. The results demonstrate that integrating photovoltaic power, automatic tracking, and GSM-IoT monitoring provides a practical renewable-energy solution for cold storage, digitalization, and sustainability in small-scale fisheries.
Influence of cutting parameters on burr morphology in milling of 1–2 mm SS304 plates Putra, Vian Rizanda; Rizza, Muhammad Akhlis
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.v24i2.8715

Abstract

Machining SS 304 in thin-plate applications presents a significant challenge due to burr formation arising from its high ductility and pronounced plastic deformation during milling. Within the 1 to 2 mm thickness range, reduced structural rigidity increases the tendency for lateral plastic flow and edge deformation, thereby compromising surface quality and increasing the need for secondary deburring operations. Although burr formation in stainless steel has been widely investigated, studies specifically addressing the influence of conventional milling parameters on burr morphology in thin SS 304 plates remain limited. This study aims to analyse the effects of spindle speeds (400 rpm and 800 rpm) and depth of cut (0.25 mm and 0.5 mm) on burr morphology in SS 304 plates with thicknesses of 1 mm, 1.5 mm, and 2 mm. Macroscopic observations were conducted using an optical microscope equipped with a 5× macro lens to evaluate burr height and deformation characteristics. The results demonstrate that increasing depth of cut consistently leads to higher burr formation due to intensified plastic deformation at the tool exit zone. Spindle speed contributes through thermomechanical effects that influence deformation stability, particularly in plates with differing rigidity. The 1 mm plate exhibited the highest burr value, reaching 284 µm, whereas the 2 mm plate showed more stable deformation behaviour with lower burr heights. These findings indicate that a combination of 800 rpm spindle speed and 0.25 mm depth of cut provides a more controlled burr condition, offering practical guidance for minimising burr defects in the conventional milling of thin SS 304 plates.
Evaluation of diaper waste combustion efficiency in a steam-pressed oil waste stove-based incinerator with two air intakes Irawan, Ibnu; Mubarok, Khamdi; Yusron, Rifky Maulana; Annisa, Rullie
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.v24i2.8631

Abstract

Waste such as used diapers remains a persistent environmental challenge that requires effective waste management solutions. This study aims to evaluate the performance and efficiency of an incinerator using diapers as the primary waste material. An incinerator can reduce waste volume and mass by converting it into ash. This experimental study using used oil and cooking oil as fuels for a steam-pressurized burner system. Variations in two-tiered air intakes are also used as a measure of evaluation of air velocity, which are 6 m/s, 8 m/s, and 10 m/s. The results demonstrates that for used oil fuel, average combustion temperatures of 376°C, 405°C, and 452°C were obtained at 6, 8, and 10 m/s, with combustion times of 97, 75, and 56 min, respectively. Residual ash masses were 1.01, 0.80, and 0.60 kg. For used cooking oil fuel, average temperatures reached 325°C, 354°C, and 387°C, with combustion times of 120, 107, and 86 min, respectively. Residual ash masses were 1.20, 1.08, and 0.85 kg. The results show that increasing air velocity significantly improved combustion temperature and reduced burning time for both fuels, while its effect on ash residue was less pronounced. Used oil produced higher combustion temperatures and faster waste reduction, whereas the highest thermal efficiency of 70% was achieved using used cooking oil at an air velocity of 10 m/s.
Green synthesis of hydroxyapatite from eggshells using orange peel (Citrus sinensis) as a template for bioceramic Ikaningsih, Manty Aldilani; Hidayat, Wahyu; Piseno, Wirawan; Nurdini, Lulu; Karmiati, Besse Titing; Rahman, Arif; Gamara, Ba’adilla Akhista
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.v24i2.8645

Abstract

This study addresses the environmental challenge posed by chicken eggshell and orange peel waste by developing a sustainable green synthesis route for hydroxyapatite (HAp). This work aimed to synthesize hydroxyapatite from eggshell-derived calcium using orange peel (Citrus sinensis L.) extract as a natural template and to evaluate the effect of extract concentration on the structural and morphological characteristics of the resulting material. Hydroxyapatite was synthesized via a wet-chemical precipitation method under alkaline conditions using orange peel extract at concentrations of 0%, 10%, 20%, and 30%. X-ray diffraction analysis confirmed hydroxyapatite as the dominant crystalline phase in all samples, with crystallinity values of 100%, 99.55%, 95.6%, and 95.2% for extract concentrations of 0%, 10%, 20%, and 30%, respectively, indicating controlled reduction in crystallite size with increasing extract concentration. Scanning electron microscopy revealed a progressive reduction in particle size, decreased agglomeration, and enhanced surface porosity, while energy-dispersive X-ray spectroscopy confirmed consistent elemental composition and high purity. Among the investigated conditions, the use of 30% orange peel extract produced the most favorable overall characteristics, combining refined microstructure and controlled crystallinity.
Experimental investigation of wear-hardness trade-off mapping for quenched HSS tools under different quenching media and austenitizing temperatures Razali, Razali; Setyawan, Reinaldi Teguh; Yendra, Alfazan Yendra
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.v24i2.8733

Abstract

This study investigates the wear-hardness trade-off of quenched AISI M2 High-Speed Steel (HSS) cutting tools subjected to three austenitizing temperatures (800, 900, and 1000°C) and three quenching media (salt water, Bromus oil, and SAE 20 oil), without subsequent tempering treatment. A factorial dataset consisting of three austenitizing temperatures (800, 900, and 1000°C) and three quenching media (salt water, Bromus oil, and SAE 20 oil) was analyzed under fixed turning parameters (n=300 rpm, f=0.19 mm/rev, a_p=1.5 mm). Tool performance was evaluated using flank wear (VB) and Rockwell hardness (HRC), with five hardness readings per condition to quantify repeatability. The results show a dominant temperature effect: VB decreases monotonically as austenitizing temperature increases, while hardness rises markedly at 1000°C, forming a favorable region with simultaneously low wear and high hardness. The best combined performance was obtained at 1000°C with SAE 20 oil, achieving VB = 0.066 mm and HRC ≈ 82.8. A desirability-style composite index D, derived from normalized VB (smaller-is-better) and HRC (larger-is-better), produced decision and rank maps that consistently identified the 1000°C region as the optimal operating window, with oil quenching preferred when high-temperature austenitizing is feasible. Hardness repeatability metrics further indicated that the 1000°C conditions exhibit the lowest scatter, strengthening their practical robustness. The proposed mapping framework offers a compact, reproducible approach to visualize the wear–hardness trade-off and to rank heat-treatment conditions using existing experimental data.
Modification of counter recoil system in pneumatic counter-tank weapon (CTW) for recoil force reduction Rosady, Siti Duratun Nasiqiati; Budiarta, Transisma; Adiwidodo, Satworo; Asrori, Asrori; Buwono, Haris Puspito
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.v24i2.8208

Abstract

The rapid advancement of defense technology within the Indonesian Army (TNI AD) requires effective, realistic training systems for Counter-Tank Weapons (CTW). Pneumatic CTW trainers have been developed as cost-effective alternatives to live-fire training; however, field tests indicate significant recoil that reduces weapon stability and shooter comfort. Unlike conventional recoil mitigation methods that rely on external dampers, springs, or structural reinforcement, this study proposes an integrated, collision-based counter-recoil mechanism embedded within the valve lever assembly that reduces recoil through internal momentum transfer without adding complex external components. This study aims to design and evaluate the proposed mechanism to reduce recoil force while maintaining firing accuracy and projectile range. Experimental tests were conducted at Politeknik Angkatan Darat under controlled conditions, using three pressure levels (10-30 bar) and three counter pad masses (0.5-1.5 kg), with three repetitions per condition. Recoil force was measured using a calibrated load cell sensor, while projectile range was recorded manually. Data were analyzed using two-way ANOVA to evaluate the effects of pressure and pad mass on recoil behavior. The results show that the proposed internal collision-based counter recoil system significantly reduced recoil force across all pressure levels. At 30 bar, recoil decreased from 81.7 N (without modification) to 65.7 N using a 0.5 kg pad and further decreased to 34.33 N with a 1.5 kg pad. Statistical analysis confirmed that both pressure and pad mass significantly influence recoil force (p 0.001, R² = 98.35%). In addition, the maximum firing range increased from 190.7 m to 221.7 m, indicating improved energy transfer and launcher stability. Although the 1.5 kg counterpad had the lowest recoil force, its additional mass may reduce launcher mobility and operator comfort. The 1.0 kg pad provides a balanced compromise between recoil reduction and ergonomic usability, making it more suitable for routine training applications. These findings demonstrate that the proposed internal collision-based counter recoil mechanism offers an effective, passive, lightweight, and practical solution for mitigating recoil in pneumatic CTW training launchers while preserving operational realism and ease of maintenance.
Microstructural evolution and mechanical performance of Ni-modified sand-cast excavator bucket teeth Hidayat, Ery; Siswanto, Ari; Hermana, Gita Novian; Kusnowo, Roni; Ruskandi, Cecep; Gunara, Sophiadi; Komara, Asep Indra
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.v24i2.8744

Abstract

Excavator bucket teeth require high strength, hardness, and impact toughness to withstand severe service conditions involving abrasion and repeated impact. Achieving this combination of properties in sand-cast low-alloy steels remains challenging. This study investigates the microstructural evolution and mechanical properties of nickel-modified sand-cast bucket teeth subjected to a five-step heat treatment process. The material was produced by sand casting with the addition of 0.6 wt.% Ni, followed by sequential heat treatment consisting of normalizing, pre-tempering, quenching, and double tempering. Microstructural characterization and mechanical testing were conducted to evaluate the effects of the heat-treatment sequence on material performance. The applied heat treatment produced a lath martensite as the dominant microstructure with the presence of retained austenite. After the final tempering stage, the tensile strength reached 1206 MPa, with a hardness of 51 HRC, and an impact toughness of 26.1 J/mm2. The improved impact resistance is associated with retained austenite promoted by nickel addition. Fractographic analysis revealed predominantly ductile fracture characterized by dimple formation, followed by crack propagation involving intergranular and secondary cracking features. These results demonstrate that nickel modification combined with heat treatment effectively improves the mechanical performance of sand-cast bucket teeth.

Page 58 of 59 | Total Record : 582

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