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All Journal INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Communications in Science and Technology Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri JURNAL PENDIDIKAN TAMBUSAI Community Engagement and Emergence Journal (CEEJ) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat BERNAS: Jurnal Pengabdian Kepada Masyarakat Teknomekanik Jurnal Aerasi Jurnal Vokasi Mekanika Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat Journal of Engineering Researcher and Lecturer Ranah Research : Journal of Multidisciplinary Research and Development JTPVI: Jurnal Teknologi dan Pendidikan Vokasi Indonesia Innovation in Engineering
Arafat, Andril
Universitas Negeri Padang
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Analisis Pembebanan Statis Komponen Crossbar Clinker Cooler dengan Variasi Beban Horizontal terhadap Lubang Pasak Akbar, M. William; Arafat, Andril; Sari, Delima Yanti; Abadi, Zainal
Al-DYAS Vol 3 No 1 (2024): FEBRUARI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/aldyas.v3i1.2773

Abstract

A clinker cooler is a very important piece of equipment in the cement industry because it functions to cool the slag or clinker that comes out of the kiln. In the cement industry, the processed clinker is first heated in a rotary kiln at °C and then lowered to temperature again. Next, the crossbar hammer crusher driven by the drive plate crushes the clinker. Clinker is transferred from the cooler inlet to the cooler outlet by this device. The performance of the main clinker cooler due to small errors can cause the kiln to stop working or disrupt other operations, such as in the mile finish area. In certain cases, cement production was disrupted due to a break in the crossbar component in the clinker cooler using the tested software Ansys Workbench 2020. It is hoped that the data from this simulation can be used as a benchmark between the results of the simulation, it can be used as a benchmark between the results of the best modified design for increasing crossbar durability through statistical loading tests with the FEA method.
Effectiveness of case method learning to optimise students' understanding of industrial mechanical machinery science Putra, Rendy Dwi; Waskito; Arafat, Andril; García, Juan Luis Cabanillas; Ayasrah, Firas Tayseer Mohammad; Fortuna, Aprilla
Journal of Engineering Researcher and Lecturer Vol. 3 No. 2 (2024): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v3i2.144

Abstract

Education has a central role in preparing individuals for the complexities of the modern world of work. Particularly in the context of education in Vocational High Schools, developing students' competencies in collaboration, creativity, and problem-solving is essential. This study explores the effectiveness of the case-based learning method in improving students' understanding of industrial mechanics. The study used a quasi-experiment design with control and experimental groups. The statistical analysis results showed that the case method was more effective in improving students' cognitive mastery than the conventional lecture method. Students who participated in case method learning showed significant improvement in the post-intervention test, demonstrating the superiority of this method in supporting a more effective learning process and preparing students for practical challenges in the field. In conclusion, the case method increases students' participation and interactivity in the learning process and deepens their understanding of technical concepts in industrial mechanics. This research provides a solid basis for implementing more effective and relevant learning methods in preparing vocational students for the increasingly complex needs of the world of work.
Optimization of Waste Cooking Oil’s FFA as Biodiesel Feedstock Primandari, Sri Rizki Putri; Arafat, Andril; Veny, Harumi
Teknomekanik Vol. 4 No. 1 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.331 KB) | DOI: 10.24036/teknomekanik.v4i1.9072

Abstract

Waste cooking oil has high Free Fatty Acid (FFA). It affected on decreasing a biodiesel production. FFA reduction is one of important processes in biodiesel production from waste cooking oil. Thus, this study aimed to examine the optimum condition in FFA reduction. The process is assisted by using ultrasonic irradiation on acid esterification. Variables of the process are acid concentration, molar ratio of methanol and oil, and irradiation time. Meanwhile temperature irradiation on 45oC is a control variable. Process optimization is conducted by Response Surface Methodology (RSM) with Central Composite Design (CCD). The optimum conditions of response were 7.22:1 (methanol to oil molar ratio), 0.92% wt H2SO4, 26.04 minutes (irradiation time), and 45oC (irradiation temperature). Ultrasonic system reduced FFA significantly compared to conventional method.
Analysis of Tensile Strength of Citronella (Cymbopogon Nardus) Fiber Reinforced Composite Materials Ardi, Julio Lukmanul; Nurdin, Hendri; Arafat, Andril; Primandani, Sri Rizki Putri
Teknomekanik Vol. 4 No. 2 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.912 KB) | DOI: 10.24036/teknomekanik.v4i2.10472

Abstract

The use of synthetic fibers in composite materials has a negative impact on the environment. One way to reduce this impact is to replace synthetic fibers with natural fibers. A natural fiber that has the potential as a mixed material in the manufacture of composite materials is citronella (Cymbopogon nardus) fiber. This study aims to determine the effect of volume fractions 40%, 50%, 60%, and 70% of citronella fiber with polyester resin matrix BQTN 157 on tensile strength. The process of making composites used the hand lay-up method. The specimen was formed according to the ASTM D3039 standard and the tensile strength of the specimen was tested by using a Universal Testing Machine (UTM). From the results of the study, the maximum tensile strength was found in the fiber volume fraction 70% of 77.35 MPa, the strain is 6.57%, and the modulus of elasticity is 1.177 GPa. This study indicates that fiber volume fraction affects the tensile strength of composite materials. Hence, the manufacture of composite materials which have good strength is influenced by many things such as raw materials, matrices, mixture composition, and methods.
Peningkatan Efektivitas Penanganan Jagung Pasca Panen Melalui Inovasi Mesin Pemipil Biji Jagung Bagi Kelompok Tani Antokan Sutra Di Kabupaten Agam Arafat, Andril; Haq, Syaiful; Media, Afriza; Syahri, Budi; Arfianti, Fina
Community Engagement and Emergence Journal (CEEJ) Vol. 5 No. 3 (2024): Community Engagement & Emergence Journal (CEEJ)
Publisher : Yayasan Riset dan Pengembangan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/ceej.v5i3.6396

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan efektivitas penanganan jagung pasca panen melalui inovasi mesin pemipil biji jagung bagi Kelompok Tani Antokan Sutra di Kabupaten Agam. Proses pemipilan jagung secara manual yang selama ini dilakukan memerlukan waktu yang lama dan tenaga kerja yang intensif, sehingga menghambat produktivitas dan efisiensi petani dalam pengelolaan hasil panen. Mesin pemipil biji jagung yang diperkenalkan dalam kegiatan ini dirancang dengan teknologi sederhana namun efektif, sehingga mudah dioperasikan oleh petani. Metode yang digunakan meliputi tahap identifikasi kebutuhan kelompok tani, pelatihan penggunaan mesin, dan pendampingan teknis dalam operasional mesin. Hasil kegiatan menunjukkan bahwa penggunaan mesin pemipil biji jagung berhasil mengurangi waktu pemipilan hingga 50% dibandingkan dengan metode manual, serta meningkatkan kualitas biji jagung yang dihasilkan. Dampak dari inovasi ini tidak hanya pada peningkatan efisiensi kerja namun juga mendorong peningkatan pendapatan kelompok tani melalui pengelolaan waktu yang lebih baik dan hasil panen yang lebih optimal. Diharapkan dengan adanya mesin ini, produktivitas dan kesejahteraan petani dapat semakin meningkat, serta dapat menjadi model pengembangan teknologi pasca panen di daerah lain.
HUBUNGAN ANTARA PENGETAHUAN KEWIRAUSAHAAN DAN MINAT BERWIRAUSAHA PADA SISWA KELAS XI TEKNIK PEMESINAN SMK SEMEN PADANG Affan, Muhammad Abdul; Prasetya, Febri; Ambiyar, Ambiyar; Arafat, Andril
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 4 (2024): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i4.752

Abstract

The purpose of this study is to determine the extent to which class XI Machining Engineering students at SMK Semen Padang have an interest in entrepreneurship and entrepreneurial expertise. It is thought that having an understanding of entrepreneurship might have a significant role in influencing students' decisions to pursue careers in business after graduation. A quantitative approach using a survey methodology is the research method employed. The study's demographic and sample comprised 51 Mechanical Engineering class XI students. Information was gathered using surveys and objective assessments that gauged students' interest in and degree of entrepreneurial expertise. The findings demonstrated a strong and positive correlation between students' interest in entrepreneurship and their knowledge about it. The product moment correlation test is a component of hypothesis testing. The calculated sig value (2-tailed) 0.002 <0.005 with a significance level of 5% and falls into the medium group, according to the data analysis calculations. Therefore, it can be said that, in the 2023–2024 academic year, SMK Semen Padang's class XI machining engineering students' entrepreneurial knowledge and interest are positively correlated.
ANALISIS SIFAT MEKANIS MATERIAL DUCTILE MELALUI UJI TARIK DAN BENDING Hidayathullah, Ilham; Rifelino, Rifelino; Arafat, Andril; Prasetya, Febri
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 4 (2024): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i4.756

Abstract

Ductile materials are often used in industry. Apart from its affordable price, its ductile and flexible properties make it easy to shape and apply in the structural industry. It is not uncommon for these materials to be chosen for their high utility. However, each ductile material has its own characteristics that differ from one material to another, ductile material means a material that has the ability to be forged or stretched due to its high level of flexibility. You can use tensile tests and bending tests. This tensile test and bending test aims to determine the hardness and ductility of ductile materials. The ductile materials used in this study are aluminum and brass. The tensile test is carried out using a UTM machine using 3 test pieces that have the same shape and size for each material. The first material is aluminum. The tensile test results on aluminum material obtained an average of 355.78 N/mm2. Meanwhile, the tensile test on brass material obtained an average of 442.28 N/mm2. Furthermore, for bending tests on aluminum and brass materials. This test uses the three point bending method and with 3 test objects of the same shape and size. The results of bending tests on aluminum material obtained an average of 1,562.961 N/mm2. As for the brass material, the average bending test value is 2,466.664 N/mm2. So it can be concluded that the tensile test
ANALISIS KESESUAIAN FASILITAS PRAKTIKUM TEKNIK PENGELASAN TERHADAP STANDAR KOMPETENSI DI SMK NEGERI 1 GUGUK Afrinaldi, Jimi; Adri, Junil; K., Arwizet; Arafat, Andril
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 4 (2024): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i4.765

Abstract

In the midst of the Industrial 4.0 era, there is an escalating demand for competent and highly skilled labor in the manufacturing and construction sectors, making this need increasingly urgent. Welding technology, as a crucial expertise in these fields, necessitates high-quality vocational education to produce competent labor. SMK Negeri 1 Guguk focuses on providing welding engineering education in accordance with industry standards. This study aims to analyze the adequacy of the welding engineering practicum facilities at SMKN 1 Guguk with prevailing competency standards. The method employed is a mixed-method approach combining qualitative and quantitative techniques, including surveys, interviews, documentation, and observations. The results indicate that while certain aspects of the practicum facilities, such as educational media and equipment, comply with the standards outlined in Permendikbud Number 34 of 2018, there are significant deficiencies in the infrastructure, facilities, furniture, and practical tools. The identified challenges include budget constraints, lack of equipment maintenance, and inadequacies in providing the latest technology. This study recommends enhancing practicum facilities, integrating the latest technologies, and improving equipment maintenance methods. These recommendations are anticipated to support the development of student competencies and enhance their readiness for the global labor market. Furthermore, the findings of this study are expected to impact vocational education broadly and contribute to the literature in the field of welding engineering vocational education, thereby creating a more prepared and highly competitive workforce.
Hubungan Minat Belajar Siswa Menggunakan Aplikasi Welducation Terhadap Hasil Belajar Kelas XI Pada Mata Pelajaran SMAW SMK N 1 Sumatera Barat Ramadhan, Fanny Fadillah; Jasman, Jasman; Rahim, Bulkia; Arafat, Andril
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 1 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.819

Abstract

A person who is involved in the learning process regularly because of pleasure without external pressure is said to have an interest in learning. This interest is a relatively constant and enduring disposition, usually focused on one particular activity such as computers, science, athletics, music, or dancing. Based on observations during the Field Experience Practice (PPL), number of problems were found related to student interest in SMAW subjects. Some of these problems include student disinterest due to the use of less than optimal learning media and lecture methods that make students bored, fall asleep, or lose focus. Some students even refuse to complete the assigned tasks, indicating low interest in learning. Because interest in learning has a major influence on learning outcomes, it is important for students to understand school standards. This study uses a quantitative method to investigate the relationship between interest in learning and learning outcomes. This study collected and analyzed data using SPSS software. Subjects of the study were 25 grade XI Las students, and the independent variable was interest in learning as measured through the use of the Welducation application. The results of the analysis show that the average value of students' learning interest is 131.40 with a standard deviation of 15.047. Meanwhile, the average value of students' learning outcomes is 86.32 with a standard deviation of 0.985. The results of the hypothesis test show a significant relationship between learning interest and learning outcomes with a correlation coefficient of 0.899 and a significance value of 0.000.
Analysis Of Physical And Mechanical Properties Of Recycled Aluminum With Variations In Molding Temperatures And Adding Degasser Powder As An Environmentally Friendly Material Abadi, Zainal; Kurniawan, Andre; Arafat, Andril; Marisa, Susi
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 2 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i1.833

Abstract

Recycling is the process of converting used materials into new materials with the aim of preventing waste that can actually be useful, reducing the use of new raw materials, reducing energy use, reducing pollution, land damage. The purpose of this study was to determine the most optimal pouring temperature to produce the best casting of the physical and mechanical properties of recycled aluminum material added with degasser powder. The urgency of this study is as a research material in the field of materials. This research method is to make 3 variations of melting temperature before pouring into the mold, the temperature variations used are 6750-7000C, 7000-7250C and 7250-7500C. At any temperature variation before pouring into the mold, degasser powder is also added to help clean the molten metal from the gases trapped in the molten metal. After the sample is molded, the results are visually observed, then a specimen is made to test the mechanical properties of the used aluminum casting. The data from the test results show that there is a fairly large porosity value in each variation. The hardness value of the test results shows that it is directly proportional to the temperature variation. At a temperature of 7250-7500C the average hardness value is 98.5 HVN. While the tensile strength at a temperature of 7250-7500C value is 83.58 Mpa, at a temperature of 7000-7250C = 74.39 Mpa and at a temperature of 6750-7000C = 71.5 Mpa. Thus the most optimal temperature in this used aluminum casting is 7250-7500C.
Co-Authors Adam Mandra Suwandi Addha Ilham Affan, Muhammad Abdul Afrinaldi, Jimi Afriza Media Ahmad Sabirin Akbar, M. William Ambiyar, Ambiyar Andre Kurniawan Andre Kurniawan Andrian Saputra Anggara, Diki Ardi, Julio Lukmanul Arfianti, Fina Arwizet Arwizet, Arwizet Ayasrah, Firas Tayseer Mohammad Budi Syahri Bulkia Rahim Daffa Raihan Senthot Delima Yanti Sari Eko Indrawan Farhan Habibie Fauza, Anna Niska Fauzan Azima Febri Prasetya Firmansyah, Gusri Firmanto, Aldi Fortuna, Aprilla García, Juan Luis Cabanillas Ghandvar, Hamidreza Ghozali, Rahmatul Habibie, Farhan Hanif, Auliya Haq, Syaiful Hendri Nurdin Hendri Sawir, Hendri Hidayathullah, Ilham Idris, Mohd Hasbullah Irzal Irzal Irzal, Irzal Is Prima Nanda Ismail, Havis Jasman Jasman Jasman Joko Suprianto Junil Adri K., Arwizet M. Nasyarudin Latif Marisa, Susi Mega Oktaviani Muhammad Zikri Mulianti Nabawi, Rahmat Azis Nanda, Is Prima Nelvi Erizon Nizwardi Jalinus Nofri Helmi, Nofri Nur Ichsan Abdillah Nurdin Hendri Nurfajri Nurfajri Nurfajri Nurfajri, Nurfajri Nurfitri Rahmi Sari Pratama, Rheda Prayoga, Ongki Primandani, Sri Rizki Putri Primawati Primawati Primawati Primawati, Primawati Putra, Randi Purnama Rahmad Fariska Putra Rahmadiawan, Dieter Ramadhan, Arya Famas Ramadhan, Fanny Fadillah Remon Lapisa Rendy Dwi Putra Rheda Pratama Rifelino Rifelino Riski Camarta Rizki Rahmadian Rodesri Mulyadi Roni Eka Sahputra Rozaki Yudha, Hatami Salmat Salmat Sari, Nurfitri Rahmi Sigit Dwi Lesmana Sigit Dwi Lesmana Silfi Chorillah Putri Sri Rizki Putri Primandari Syahril Syahril Syahril Syahril Veny, Harumi Waskito Yolli Fernanda Yufrizal A Zainal Abadi Zofa, Thifal Nefri Zulhan Insan Makruf