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Program Studi Sarjana Terapan Teknik Mesin Produksi dan Perawatan, Jurusan Teknik MesinPoliteknik Negeri Sriwijaya, Palembang, Indonesia
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MACHINERY: Jurnal Teknologi Terapan
Published by Politeknik Negeri Sriwijaya
ISSN : 27233359     EISSN : 2776673X     DOI : https://doi.org/10.5281/zenodo.
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
MACHINERY Jurnal Teknologi Terapan was published by Mechanical Engineering Department, Politeknik Negeri Sriwijaya to disseminate in the form of technical and vocational research results of undergraduate (Sarjana Terapan) students of Mechanical Engineering in the fields of Machinery, Manufacturing, Metallurgy Sciences and Engineering, Design Engineering, Heavy Machine to academics, practitioners and students as well as interested parties. MACHINERY accepts article submissions written in Indonesian and welcoming in English. Determination of articles published in Machinery Jurnal Teknologi Terapan is through a review process by best partner of MACHINERY by considering, among others: fulfillment of the standard requirements of journal publications, research methods used, significance, and contribution to the results of research on technical and vocational in Mechanical engineering field study.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 124 Documents
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Pengaruh Putaran dan Waktu Terhadap Ketahanan Aus pada Aluminium : pengaruh ketahanan aus pada aluminium Septrianti, Nabila Adisty; Sailon; Mardiana; Rizal, Syamsul
MACHINERY Jurnal Teknologi Terapan Vol. 6 No. 3 (2025): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

This research aims to examine the effect of rotation and time variations on the wear resistance of aluminum. Aluminum is a material that is often used in various industries because of its lightness and corrosion resistance. However, one of the weaknesses of aluminum is its relatively low resistance to wear. In this research, aluminum samples were tested using a Tribometer machine with rotation variations of 500, 700, and 900 RPM while the test time variations were 10, 20 and 30 minutes. From this test, the rotation results with the highest aluminum wear value were obtained with RPM 900 with a wear value of 0.070 g and the lowest wear value was obtained with RPM 500 with a wear value of 0.014 g. And the lowest wear rate results for aluminum were obtained in 10 minutes with an average wear value of 0.02111 g and the highest wear value was obtained in 30 minutes with an average wear value of 0.61333 g.
ANALISIS KEBOCORAN HYDRAULIC MANIFOLD PADA PESAWAT AIRBUS 330 SERIES DI PT XYZ MENGGUNAKAN METODE RCFA I Komang Gede Galang Aditya Wirama; Iwan Engkus Kurniawan; Fawwaz Yusa Gifari
MACHINERY Jurnal Teknologi Terapan Vol. 6 No. 3 (2025): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.17505993

Abstract

The Airbus 330 series aircraft uses a hydraulic system to move various main components such as landing gear, flight control, and braking. In its operation, this system utilizes pressurized fluid transferred through the HP manifold to each user system. The Airbus 330 series aircraft has 3 HP manifold components installed in each system. Based on data from PT XYZ engineering, there have been 86 hydraulic leak problems that occurred in the HP manifold in the period from 2021 to 2024. Therefore, it is necessary to analyze and determine the cause using the Root Cause Failure Analysis (RCFA) method with pareto diagram tools, fishbone diagrams, and 5W + 1H. The results of the study found that there are 4 causes of leaks in the HP manifold, namely packing, connection, union, and clogging. The most dominant problem is caused by packing with a percentage of 82.56%. The results of the analysis using a fishbone diagram showed that leaks caused by packing occurred due to complacency, the use of manual torque wrenches when maintenance, the use of non-specific job card inspections in DVI, working outside the hangar at night, and the degradation of packing materials caused by the higher acidity of the hydraulic fluid. Higher acidity is the most influential factor in packing damage, causing leaks in the HP manifold. By using the 5W + 1H method, a repair proposal was obtained for the company in the form of creating an Engineering Order (EO) and making readjustments related to the maintenance program.
MODIFIKASI INSTALASI POMPA HYDRAULIC POWER UNIT UNTUK MENURUNKAN DOWNTIME EQUIPMENT DAN KONSUMSI OLI HIDROLIK Apri Setiawan; setiawan, Dibyo; Steven Gabriel Romero; Hanni Maksum Ardi; Rifan Mustofa; Agus Suben
MACHINERY Jurnal Teknologi Terapan Vol. 6 No. 3 (2025): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Mesin Computer Numerical Control (CNC) merupakan peralatan manufaktur yang dikendalikan oleh komputer dengan bahasa numerik. Salah satu jenisnya adalah CNC Milling yang menggunakan sistem hidrolik melalui Hydraulic Power Unit (HPU) untuk proses clamp dan unclamp material kerja. Permasalahan yang ditemukan adalah tekanan hidrolik yang tidak stabil dan suhu HPU yang tinggi akibat beban kerja berlebih (overload), sehingga menyebabkan lemahnya sistem clamping, meningkatnya konsumsi oli hidrolik, serta bertambahnya downtime mesin. Untuk mengatasi hal tersebut, dilakukan modifikasi dan instalasi tambahan pada pompa HPU. Tahapan kegiatan meliputi identifikasi kerusakan, studi literatur, perancangan modifikasi, pengadaan komponen, instalasi, pengujian, dan evaluasi hasil. Hasil modifikasi menunjukkan bahwa penambahan satu unit pompa HPU beserta instalasi pendukung mampu meningkatkan tekanan hingga 80 bar dan menurunkan temperatur HPU sebesar 28,2°C. Selain itu, konsumsi oli hidrolik turun menjadi 14 liter per bulan, dan nilai Downtime to Equipment (DTE) hidrolik berkurang hingga 0,07%. Berdasarkan hasil tersebut, modifikasi sistem HPU terbukti efektif dalam meningkatkan stabilitas tekanan, menurunkan temperatur operasi, serta mendukung peningkatan produktivitas mesin CNC Milling yang telah dimodifikasi.
Analisis Ketangguhan Impak dan Karakter Patahan Komposit Sandwich Serat Rami–Epoksi Berbasis Corrugate Cardboard Zulkifli, Zulkifli; Dharmawan, Ida Bagus; Akbar , Syaeful; Zulfati Yusrina , Yasmin; Sanchia Samosir, Devina; Amin , Mohamad; Prayoga, Rafli
MACHINERY Jurnal Teknologi Terapan Vol. 6 No. 3 (2025): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

The combination of hemp fibers and epoxy resin in a sandwich structure offers a balance between stiffness and light weight, especially when using corrugated cardboard as the core material. However, the effect of fiber orientation on impact energy absorption and fracture characteristics in natural fiber-based sandwich composites has rarely been studied in depth. This study aims to analyze the effect of fiber orientation on the impact toughness and fracture morphology of hemp fiber–epoxy sandwich composites with corrugated cardboard cores. Hemp fiber is used as a natural reinforcement because it is lightweight, renewable, and has good mechanical strength. The composite panels were arranged in three fiber orientations —longitudinal (0°), transverse (90°), and plain weave —using the vacuum bagging method. Bisphenol-A epoxy resin served as the matrix, while the core came from double-wall cigarette carton waste. Impact testing was conducted using the Charpy method in a flatwise configuration in accordance with ISO 179-1:2023 to assess the panel's ability to absorb impact energy. The results show that fiber orientation significantly affects energy absorption and impact toughness. The 0° orientation produced the highest energy (2.854 J) and toughness of 30.43 kJ/m², while the 90° and plain weave orientations decreased by 36% and 70%, respectively. Macroscopic observations revealed characteristic failure patterns: 0° exhibited microcracks and core shear fractures; 90° showed fiber pull-out and delamination; while Plain weave displayed fiber bridging and brittle cracks. Longitudinal orientation provided the best impact toughness and the most efficient load transfer

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