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All Journal Penelitian Pendidikan Journal of Mechanical Engineering Education (Jurnal Pendidikan Teknik Mesin) INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN TAMBUSAI Community Engagement and Emergence Journal (CEEJ) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Asatiza: Jurnal Pendidikan Teknomekanik Jurnal Vokasi Mekanika MASALIQ: Jurnal Pendidikan dan Sains CONSEN: Indonesian Journal of Community Services and Engagement Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat Journal of Engineering Researcher and Lecturer Jurnal El-Hadhary: Jurnal Penelitian Pendidikan Multidisiplin Journal of Innovative and Creativity Indonesian Journal of Innovation Science and Knowledge Innovation in Engineering Edumaspul: Jurnal Pendidikan
Rifelino Rifelino
Universitas Negeri Padang
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ANALISIS VARIAN PARAMETER PEMESINAN BUBUT TERHADAP KUALITAS PERMUKAAN BENDA KERJA DAN KARAKTERISTIK GERAM TERPOTONG Jannuar, Arifin; Rifelino, Rifelino; Syahri, Budi; Abadi, Zainal
Jurnal Vokasi Mekanika (VoMek) Vol 4 No 4 (2022): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v4i4.447

Abstract

Dalam dunia industri, pemesinan merupakan proses paling banyak dipakai untuk membuat komponen mesin pada bahan logam, baik itu yang berbentuk kotak maupun silindris. Perkembangan didalam dunia permesinan sangat menuntut kualitas yang baik dalam tingkat kualitas permukaan benda. Mesin bubut merupakan satu dari beberapa mesin yang memproduksi komponen mesin. Tingkat kekasaran permukaan benda sangat berpengaruh kepada fungsi dari produk tersebut oleh karena itu, pada setiap pengerjaan mesin bubut terdapat level kekasaran yang harus tercapai. Penelitian ini bertujuan untuk mengetahui kombinasi dari parameter yang menciptakan kekasaran permukaan dengan angka yang kecil dan hubungannya pada karaktersitik geram yang dihasilkan. Metode yang dilakukan pada penelitian ini yaitu eksperimen dimana percobaan yang dilakukan berjumlah 8 spesimen uji. Parameter permesinan yang paling berpengaruh pada tingkat kekasaran permukaan benda adalah kecepatan potong yaitu 73,07%, lalu diikuti oleh pemakanan yaitu 13,26%, dan yang paling kecil pengaruhnya terhadap kekasaran permukaan benda adalah kedalaman pemotongan yaitu 0,60%. Berdasarkan hasil dari pengukuran kekasaran permukaan didapatkan tingkat kekasaran paling rendah pada 1.69 dan level kekasaran N7 dengan kombinasi kecepatan potong (Vc) 120 m/menit, pemakanan(f) 0.08 m/rot dan kedalaman pemotongan (a) 1.5 mm. Geram yang dihasilkan berbentuk continous dengan panjang ±35 cm. Dari hasil yang didapatkan dapat disimpulkan karakteristik geram yang dihasilkan pada proses pembubutan berbanding terbalik dengan nilai kekasaran permukaan benda.
VALIDITAS LEMBAR KERJA PESERTA DIDIK ELEKTRONIK (E-LKPD) TEKNIK PEMESINAN FRAIS DI KELAS XI TEKNIK MESIN SMK N 1 BUKITTINGGI Agung, Agung; Indrawan, Eko; Rifelino, Rifelino; Wulansari, Rizky Ema
Jurnal Vokasi Mekanika (VoMek) Vol 5 No 1 (2023): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v5i1.498

Abstract

Teknik pemesinan frais adalah mata pelajaran yang membutuhkan pemahaman peserta didik tentang teori dan praktek karena akan diterapkan langsung ketika bekerja di mesin frais. Oleh karena itu, dibutuhkan berbagai jenis media pembelajaran untuk proses belajar mengajar, seperti lembar kerja peserta didik elektronik (E-LKPD). Dengan E-LKPD belajar akan lebih menyenangkan karena di dalam E-LKPD tidak hanya berisi materi saja namun juga berisi video, animasi, soal tugas dan lainnya. Berdasarkan hasil observasi, E-LKPD masih belum digunakan oleh guru untuk membantu siswa dalam menyelesaikan masalah ketika belajar dan kurang bervariasinya bahan ajar yang digunakan sehingga proses belajar mengajar menjadi kurang menyenangkan. Penelitian ini bertujuan untuk membuat E-LKPD dan memastikan tingkat validitasnya pada mata pelajaran teknik pemesinan frais. Jenis penelitian Research and Development (RnD), dengan model penelitian 4-D oleh S. Thiagarajan dengan menggunakan lembar angket untuk pengumpulan data. Uji validitas dilakukan oleh empat orang ahli di bidang materi dan media. Berdasarkan perolehan data, penilaian kedua ahli materi terhadap hasil validasi materi menunjukkan rata-rata 82% dengan kriteria sangat valid. Penilaian kedua ahli media terhadap hasil validasi media menunjukkan rata-rata 86% dengan kriteria sangat valid. Karena belum dilakukan uji kepraktisan atau keefektifan, maka dapat ditarik kesimpulan bahwa media pembelajaran E-LKPD yang dihasilkan valid tetapi belum layak untuk digunakan.
PENGEMBANGAN MODUL PEMBELAJARAN MATA PELAJARAN FRAIS (MILLING) PADA SMK DI SUMATERA BARAT Ichsan, Albayhaqi; Syahri, Budi; Rifelino, Rifelino; Media, Afriza
Jurnal Vokasi Mekanika (VoMek) Vol 5 No 4 (2023): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v5i4.600

Abstract

Substansi informasi yang disebutkan dalam capaian pembelajaran Teknik Pemesinan Frais kelas XI belum sepenuhnya tercakup dalam media belajar yang dipakai pada kegiatan pengajaran, sehingga proses belajar menjadi kurang efisien dan efektif. Metodologi pengembangan 4D (pendefinisian, perancangan, pengembangan, dan penyebaran) digunakan dalam pembuatan modul pembelajaran melalui penelitian R&D. Lembar validasi berupa angket yang diberikan kepada 2 dosen dari Teknik Mesin FT UNP untuk ahli media, 1 dosen dari Teknik Mesin FT UNP dan 1 orang Guru Mata Pelajaran di SMK untuk ahli materi digunakan untuk mengumpulkan data penelitian. Statistik deskriptif kuantitatif digunakan untuk menganalisis data, yaitu dengan melihat data dengan menguraikan data yang telah diperoleh. Berdasarkan dari hasil temuan validitas melalui ahli materi yang diraih nilai akhir V pada angka 0,842 dan ahli media yang diraih nilai akhir 0,909 dalam kriteria yang valid, maka temuan penelitian pengembangan dari modul ini diraih layak untuk dipakai menjadi media belajar yang mandiri bagi siswa. Modul ajar Teknik Pemesinan Frais kelas XI Teknik Pemesinan yang dihasilkan sangat layak untuk dipakai menjadi media belajar yang mandiri sebagai pendukung bagi siswa, hal ini bisa diraih melalui hasil evaluasi validitas modul yang dikembangkan.
Numerical Structural Response Analysis of Savonius Wind Turbine Blades with Geometric Variation under Aerodynamic Loads Sudjono, Aldo Alfattah; Sari, Delima Yanti; Syahril, Syahril; Rifelino, Rifelino
invotek Vol 25 No 3 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i3.1327

Abstract

Rising demand for electrical energy has accelerated the development of renewable energy technologies, including wind turbines designed to operate at low wind speeds. The savonius vertical-axis wind turbine is a promising option due to its simple configuration and insensitivity to wind direction. Nevertheless, the structural reliability of its blades is strongly affected by their geometry and the material selected. This study focuses on evaluating the structural response of savonius turbine blades under aerodynamic loading using the finite element analysis (FEA) method. Simulations were carried out in ANSYS Workbench R2 2025, considering geometric variations in blade thickness (1.2 mm, 1.5 mm, and 2 mm), aspect ratio (0.8, 1.0, and 1.3), and arc angle (120°, 150°, and 180°). The blades were modeled using AISI 304 stainless steel. The analysis examined von mises equivalent stress, total deformation, and safety factor. The analysis results show that all geometric variations are structurally safe with a safety factor value of 15. The highest maximum von mises stress of 0.081 MPa occurs at a thickness of 1.2 mm, while the lowest value of 0.017 MPa is obtained at an arc angle of 180°. The maximum deformation of 3.38 × 10⁻³ mm occurred at an arc angle of 150°, while the lowest deformation of 6.77 × 10⁻⁴ mm was obtained at an arc angle of 180°, which indicates the most structurally stable configuration.
3D scanner technology in the reverse engineering of complex mechanical components: A literature review Afferli Seftian; Delima Yanti Sari; Rifelino Rifelino; Zainal Abadi
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.213

Abstract

This study addresses the challenges involved in the reverse engineering of complex mechanical components, where conventional manual measurement methods often produce geometric deviations that negatively affect the reliability of advanced engineering analyses. A descriptive literature review was conducted to evaluate the role of 3D scanning technology in overcoming these limitations. The study compares various data acquisition methods, including laser scanning, structured light scanning, and photogrammetry, while also analysing how the level of geometric accuracy influences finite element simulation results and structural analysis outcomes. The review found that 3D scanning significantly improves geometric fidelity compared with traditional techniques, thereby enhancing the validity of numerical simulations. However, the review also identified that the quality of the final model is highly dependent on the selected scanning technology, surface conditions, and advanced reconstruction processes such as point cloud registration and mesh generation. The findings indicate that although 3D scanning offers superior precision, geometric deviations may still occur and influence structural parameters. This study concludes that the integration of 3D scanning into reverse engineering workflows requires systematic validation to ensure not only visual accuracy but also functional reliability in engineering applications. Furthermore, this review highlights a critical research gap, suggesting that future studies should place greater emphasis on the direct correlation between geometric accuracy and engineering simulation outcomes.
Adhesion mechanisms and mechanical performance of single-lap joints in FDM-3D printed: A review Muhamad Qeisya Hanif; Rifelino Rifelino; Febri Prasetya; Zainal Abadi
Journal of Engineering Researcher and Lecturer Vol. 5 No. 1 (2026): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v5i1.214

Abstract

Additive Manufacturing (AM), particularly Fused Deposition Modeling (FDM), has evolved from a rapid prototyping technology into a manufacturing approach for producing functional components across a wide range of industrial sectors. Nevertheless, the limited build volume of FDM systems has encouraged the use of adhesive bonding as a practical method for joining sub-components, with the single-lap joint (SLJ) configuration being among the most widely adopted designs. This review aims to provide an integrated analysis of the relationship between FDM-induced surface morphology, the adhesion mechanisms developed at the bonded interface, and their implications for stress distribution, shear strength, and joint failure modes. The findings indicate that the surface characteristics generated by the FDM process, including layer lines, stair-stepping effects, voids, and porosity, create interfacial conditions that differ fundamentally from those of homogeneous materials. These characteristics also produce a non-linear relationship between surface roughness and joint strength. Process parameters such as printing orientation and layer height were identified as key controlling factors that influence surface topography and adhesive performance. From a mechanical perspective, the eccentric load path inherent in SLJ configurations generates significant shear and peel stress concentrations at the overlap ends. These stress concentrations coincide with structurally weak regions that are intrinsically associated with FDM adherends, making them the primary sites for crack initiation and joint failure. Furthermore, modifications to overlap geometry and tailored adhesive distribution have been recognized as effective strategies for improving stress redistribution and enhancing the load-bearing capacity of the joint. This review highlights that the assessment of adhesive joints in FDM-manufactured components requires an integrated analytical framework that accounts for the coupled interactions among printing process parameters, surface conditions, adhesive properties, and progressive failure modeling. Such an approach is essential for the development of reliable structural joint designs for FDM-based applications.
CFD-based Taguchi optimization of impeller geometry to improve centrifugal fan efficiency Delima Yanti Sari; Bagas Santoso; Hendri Nurdin; Hastuti Hastuti; Rifelino Rifelino; Fitrah Qalbina; Tsung-Liang Wu; Dani Harmanto
Teknomekanik Vol. 9 No. 2 (2026): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v9i2.53772

Abstract

Centrifugal fans play a significant role in industrial ventilation systems. Their performance is affected by aerodynamic losses such as flow separation and non-uniform pressure distribution, thereby reducing the overall efficiency. Since design parameters influence the fan efficiency, design parameter optimization becomes one option for addressing this issue. Some optimization methods involve high computational cost and complex procedures. This raises the necessity for a more efficient and systematic optimization procedure. The aim of this study is to propose an integrated approach which involves Computational Fluid Dynamics (CFD) and the Taguchi method to improve the performance of a centrifugal fan. CFD is used to evaluate the performance of different design combinations, while the Taguchi method is used to optimize design parameters. The investigated design parameters are the inlet blade angle (β1), the outlet blade angle (β2), the number of blades (n), and the flow rate (Q). Each of the design factors has three levels, therefore, an L9 orthogonal array was utilized as the design of experiments. Analysis of variance (ANOVA) is used to determine their relative significance. The results show that the optimal combination of design parameters increase the efficiency from 39.79% (the reference) to 63.26%. The CFD simulations for the optimal combination exhibit the improved flow behaviour, which explains the enhanced efficiency. The results show the feasibility of the proposed method for improving the performance of the centrifugal fan.
Analysis Thermal for Disc Brake Using Finite Element Analysis (FEA) Alparis Nico Putra Utama; Wanda Afnison; Delima Yanti sari; Rifelino Rifelino
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.853

Abstract

Traffic accidents are one of the highest causes of death in Indonesia. One of the factors traffic accidents is caused by vehicles, in this case the braking system. Brakes are a device on a vehicle that functions to reduce the speed by applying friction. The main feature in the braking system is heat dissipation. If the brake overheating, the effectiveness of the braking system will be reduced. In general, there are two types of brakes, but in modern vehicles disc brake more used. In this study, various types of disc brakes will be tested. The designs tested are solid disc brakes, drilled-type disc brakes, and grooved-type disc brakes. The aim of research for determine the most optimal disc brake design. The temperature value on the surface of the disc brake will be measure. The Finite Element Analysis (FEA) method is used in this study. The validation process is carried out by comparing analytical result and Finite Element Analysis result on solid disc brakes. The speed before braking is 60 km / h. Material used on disc brake is grey cast iron. In the simulation process using Finite Element Analysis, the mesh size used is 3 mm and the number of elements is 255,244 elements. After the analysis was carried out, the temperature value in the grooved-type disc brake design was the smallest value than another with a maximum temperature of 143.56 ºC during braking. Thus, based on the results obtained, the grooved-type disc brake tends to be more optimal.
Students' Perception Of Machining Workshop Facilities And K3 Knowledge Towards Learning Outcomes In The Subject Of Lathe Machining Engineering In Grade 11 Of SMK Negeri 1 Sumatera Barat Ahmad Rifai Sihombing; Arwizet K; Rifelino Rifelino; Primawati Primawati
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i2.861

Abstract

Vocational schools are a strategic forum to introduce and build students' awareness of the importance of behaviors that support Occupational Health and Safety (K3). Based on the results of pre-observation at SMK Negeri 1 West Sumatra, it was found that several problems were quite significant related to learning outcomes and students' knowledge about Occupational Health and Safety (K3) in the Lathe Machining Engineering Subject. Inadequate workshop facilities result in students not understanding and not utilizing K3 equipment. This problem is the author's material to conduct research to measure Students' Perception of Machining Workshop Facilities and Students' K3 Knowledge of Student Learning Outcomes which is carried out by descriptive analysis methods. This study analyzed two independent variables and one dependent variable. Variables Workshop facilities, variables K3 Knowledge and Learning Outcomes as variables Y. The purpose of this study is to show that the percentage results obtained from each variable can describe how students' perception of the K3 Machining and Knowledge Workshop Facilities and Learning Outcomes are. The results of the study show that the value of the variable (Workshop Facility) has a perception at a low level, namely 7 (35%) students, the variable (K3 Knowledge) can illustrate that students' perception of K3 Knowledge is very high where as many as 7 (35%) students have this perception This illustrates that students' understanding of K3 Knowledge is very good. Furthermore, the Y variable (Learning Outcomes) shows a high percentage value it can concluded that most students have a good understanding of K3 Knowledge.
Experimental Study of Geometrical Accuracy of Artec Leo 3D Scanner on Complex Object Scanning Muhammad Khattami Al Saidhi; Rifelino Rifelino; Delima Yanti Sari; Febri Prasetya
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i3.890

Abstract

This study aims to measure the geometrical accuracy of complex object scanning using the Artec Leo 3D scanner. The scanned object is a wheel rim, with eight combinations of parameters including variations in distance (50 cm and 100 cm), scanning angle (45° and 90°), and lighting conditions (indoor and outdoor). Deviations were measured from four reference points on the scanned model and compared to a reference model. The results show that the Indoor configuration with a scanning distance of 50 cm and a scanning angle of 90° gives the smallest deviation of 0.025 mm (0.01%), while the Outdoor configuration with a scanning distance of 50 cm and a scanning angle of 45° produces the largest deviation of -3.275 mm (-1.80%). The overall average deviation of all combinations is -0.63 mm or -0.36%, indicating that the Artec Leo can produce high accuracy if configured with the right parameters. The smallest deviation was obtained under indoor scanning conditions with a scanning distance of 50 cm and a scanning angle of 90°.
Co-Authors - Primawati A.A. Ketut Agung Cahyawan W Abadi, Zainal Abadi Abdul Aziz Abdul Aziz Abdullah, Adlan Azmi Abdullah, MT, Dr. Rijal Addha Ilham Aditya Bernaldo Afferli Seftian Afriza Media Agung Agung Ahmad Firdaus Ahmad Rifai Sihombing Ahmad Shafwan Hadi Alparis Nico Putra Utama Altarisi, Muhammad Athar Ambiyar, Ambiyar Andril Arafat Anggara, Diki Aprianti, Maidinda Arafat, Andri Arafat, Andril Arizal Saputra Arwizet Arwizet, Arwizet Bagas Santoso Berril Habibil Rizka Bima Afrindo Putra Budi Syahri Bulkia Rahim Dani Harmanto Delima Yanti Sari Delima Yanti Sari Diki Anggara Dira Nurfaedah Doni Hamdani Doni Kris Saputra Donny Fernandez Dori Yuvenda Dzaky Dzulqa Arijal Eko Indrawan Enjelita Enjelita Erwin Candra Fadhil Naufan Fathur Rahman Fauza, Anna Niska Febri Al Rasyid Febri Prasetya Fitrah Qalbina Fretina Sari Galib Afdi, Alham Harahap, Doa Hastuti Hastuti Hendri Nurdin Hidayathullah, Ilham Hilman, Antoni Ichsan, Albayhaqi Illahi, Ridho Irzal Irzal Irzal Irzal Irzal, Irzal Ivan Framana Jannuar, Arifin Jasman Jasman Julian Berlin Roland Tobing Junil Adri Laksono Trisnantoro Muhamad Qeisya Hanif Muhammad Athar Altarisi Muhammad Ichsan Muhammad Iqbal Tawakal Muhammad Iqbal Tawakal Muhammad Khattami Al Saidhi Muhammad Restu Alhamdi Muhammad Zikri Muharam, Bananda Mulianti Mustaqin, Iqbal Nabawi, Rahmat Azis Nabawi, Rahmat Aziz Nizwardi Jalinus Nofri Helmi Nofri Pratama Putra Nugroho, Anang Puji Nurdin Hendri Nurhasan Syah Nurmahmudi, Nurmahmudi Ogif Pradinata Putra Oktober, Qori Prasetyo, Muhamad Julianes Pratama, Daffa Aji Primawati Primawati Primawati Primawati, Primawati purwantono purwantono Purwantono, Purwantono Rahmad Rian Dawab Midik Rahman Febrio Rajul Halim Perdana Ismet Rangga Ligendra Refdinal Refdinal Refdinal, Refdinal Refdinal, Refdinal Remon Lapisa Resqy Dwicandra Rhionaldo, Ananda Jafron Rifai Adlani, M. Rifaldo Novembli Rika Yunita Rinto Mariadi Rodesri Mulyadi Rozaki Yudha, Hatami Said Fuad Amry Salwa Chairani Sudjono, Aldo Alfattah Syahril Syahril Syahril Syahril Thoha, Adi Try Yudo Margono Tsung-Liang Wu Wahyudi Wahyudi Wanda Afnison Wardhana, Bayu Setya Waskito Waskito Waskito Waskito Waskito, Waskito Wulansari, Rizky Ema Yolli Fernanda Yufrizal A Yufrizal Yufrizal Yufrizal Yufrizal Yufrizal Yufrizal, Yufrizal Yusra M. Nur Zainal Abadi Zainal Abadi Zuanda Maulana Nasution