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Jurnal Pendidikan Teknik Mesin Undiksha
Published by Universitas Pendidikan Ganesha
ISSN : 26141876     EISSN : 26141884     DOI : http://dx.doi.org/10.23887/jjtm.v7i1.18616
Core Subject : Education, Engineering,
Automotive Engineering Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Pendidikan Teknik Mesin, adalah jurnal ilmiah yang diterbitkan oleh Jurusan Pendidikan Teknik Mesin, Fakultas Teknik dan Kejuruan, Universitas Pendidikan Ganesha. Jurnal ini bertujuan untuk mewadahi artikel-artikel hasil penelitian dan hasil pengabdian masyarakat dibidang pendidikan dan pembelajaran teknik. Pada akhirnya Jurnal ini dapat memberikan deskripsi tentang perkembangan ilmu pengetahuan dan teknologi di bidang pendidikan teknik mesin bagi masyarakat akademik. Jurnal ini terbit 3 kali setahun.
Arjuna Subject : Umum - Umum
Articles 292 Documents
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Analisis Karakteristik Serat Pandan Bali dan Sabut Kelapa dengan Perlakuan NaOH sebagai Penguat Polyester Komposit: Analysis of Bali Pandan Fiber and Coconut Fiber Characteristics with NaOH Treatment as a Polyester Composite Reinforcer Ida Ayu Putu Indah Komala Dewi; IK Suarsana; IGP Agus Suryawan; Kadek Rihendra Dantes; I Putu Lokantara; I Made Astika; I G N Nitya Santhiarsa
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.94002

Abstract

The development of composite materials has become a major focus of research in recent decades, especially natural fiber composites with a unique combination of physical and mechanical properties of materials. Polyester composites can be produced by utilizing synthetic and natural fibers. The natural fibers studied are the characteristics of Balinese pandan fiber and coconut fiber with NaOH solution treatment for polyester composite reinforcement. The treatment of Balinese pandan fiber and coconut fiber was carried out by soaking in a 10% NaOH solution, aiming to remove lactic acid and cellulose, in order to increase the bond between the polyester matrix and the fiber, both Balinese pandan fiber and coconut fiber. In this study, the effect of soaking time of Balinese pandan fiber and coconut fiber on the characteristics of physical properties was studied through Thermogravimetric Analysis (TGA) testing, with LECO USA machine specifications, model: 604-100-700, series: 6204 at the UNUD Mechanical Engineering Laboratory. This test was carried out by soaking Balinese pandan fiber and coconut fiber in a 10% NaOH solution at various soaking times: 1 hour, 2 hours and 3 hours. Then the Thermogravimetric Analysis (TGA) test was carried out, then the characteristics and physical properties of the Balinese pandan fiber and coconut fiber were obtained in the form of dust content, water content, volatile, fix Carbon. Based on the test results data on the 10% NaOH treatment, for coconut fiber soaked for 2 hours, the highest Fix Carbon level was obtained, namely 21.15 and the highest Balinese pandan fiber was 15.50, which can be used for bending test materials. In Balinese pandan fiber, the highest volatile level was obtained at 89.81 and coconut fiber 80.73, which can be used for sound absorption test materials.
Perlakuan Post Weld Heat Treatment (PWHT)) Baja SS400 Terhadap Kekerasan Dan Struktur Mikro: Post Weld Heat Treatment (PWHT) of SS400 Steel on Hardness and Microstructure Hazazi, M.Izza; Lubis, Sudirman
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.94547

Abstract

Write the abstract in English here. If articles in English, abstract in Indonesia language do not need to be included. Writing abbreviations and mathematical formulas in the abstract needs to be avoided. The abstract consists of summary of the research objectives, approaches or methods used, important results and conclusionsPost weld heat treatment (PWHT) has a significant influence on the mechanical properties and microstructure of low carbon steel, especially in the Base Metal, Heat-Affected Zone (HAZ), and Weld Area regions. This study aims to analyze changes in hardness and microstructure due to PWHT at 400°C, 500°C, and 600°C. The hardness test results show that at 400°C there was an increase of 24.5 HV in the Base Metal, 8.9 HV in the HAZ, and a decrease of 5.4 HV in the Weld Area. At 500°C, the increase in hardness was more significant with a value of 28.7 HV in the Base Metal, 19.8 HV in the HAZ, and a decrease of 15 HV in the Weld Area. However, at 600°C, the Base Metal decreased in hardness by 21.6 HV, the HAZ remained stable without change, and the Weld Area decreased by 17 HV. Microstructure analysis shows that PWHT at 500°C produces more significant changes than other temperatures, with greater growth of ferrite and pearlite phases. This is in line with the increase in hardness in the Base Metal and HAZ areas. In addition, observations showed that a welding current of 130A provided optimal penetration, resulting in a good metallurgical bond between the weld metal and the base metal. Thus, this study confirms that PWHT can be utilized to control the hardness and microstructure of materials to improve the quality of welded joints in low carbon steel
Evaluasi Program Teaching Factory di Sekolah Menengah Kejuruan menggunakan CIPP Framework: Evaluation of the Teaching Factory Program in Vocational High Schools Using the CIPP Framework Prihantoro, Constantinus Rudy; Nugraha, Hari Din; Gumelar, Agung; Pratama, David; Gunadi, Diandra Keisha; Ibrahim, Fakhrizal Hafish
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.95013

Abstract

Teaching Factory is a learning program that optimizes the curriculum, resources, and human capital in Vocational High Schools (SMK) of Centers of Excellence. The objectives of this study are: (1) to identify the level of conformity in the implementation of the Teaching Factory program by analyzing the Context, Input, Process, and Product (CIPP) at five SMKs in DKI Jakarta; and (2) to formulate recommendations for improving and developing the Teaching Factory program to be more effective and sustainable. This research employed a quantitative method with a CIPP-based evaluation instrument, involving vice principals of curriculum and facilities, teachers, and students as research subjects. The findings reveal that: (1) Context: average score 3.61 out of 4, the curriculum is relatively aligned with industry needs, but the understanding of educational regulations remains low due to limited dissemination of government policies to teachers and school management; (2) Input: average score 3.55, facilities and infrastructure are inadequate due to limited budgets and lack of regular equipment calibration, which reduces the quality of marketable products and human resources, although teachers’ pedagogical competence (avg. 3.8) is already good; (3) Process: average score 3.59, learning methods are less innovative as teachers still rely on lectures and employ ineffective assessment instruments, resulting in low collaboration among students and suboptimal graduate employability; (4) Product: average score 3.26, the quality of marketable products falls below industry standards due to weak school quality control systems and the underutilization of project-based assessment. These findings can serve as a basis for strategies and curriculum development that better prepare students for the labor market and help reduce the unemployment rate among SMK graduates.
Pengaruh Variasi Post Weld Heat Treatment (Pwht) Terdadap Sifat Mekanik Baja Aisi 1045 Hasil Pengelasan Gmaw: The Effect of Post Weld Heat Treatment (PWHT) Variations on the Mechanical Properties of AISI 1045 Steel from GMAW Welding Results Martdiansyah, Dico; Lubis, Sudirman
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.96072

Abstract

The paper is written fully in Bahasa Indonesia (except the abstract is written in English) using Times New Roman font type, 12 font size and single row space. The paper size is A4 (21 × 29.7 cm) and the author is recommended not to write more than 10 pages. The main article content covers abstract, introduction, literature review, method, result, and conclusion. Pictures, tables and equations can be included in the article. Top, bottom, and right / left margin of the paper are 2.54 cm, respectively. The number of words in the abstract is around 200 words. The abstract should mention briefly the background, objectives, method, and main conclusions. Following the abstract, write down five keywords for indexing. An unusual abbreviation should be defined clearly after the first mentionThis study examines the effect of Post Weld Heat Treatment (PWHT) on the mechanical properties of AISI 1045 steel, particularly tensile strength and hardness, at various treatment temperatures. The tensile test results show that increasing the PWHT temperature tends to decrease the tensile strength of the material. At 600°C, the tensile strength reached 632.62 N/mm², yield strength 408.08 N/mm², and elongation 5.76%. At 700°C, the tensile strength decreased to 551.89 N/mm², the yield strength increased to 433.74 N/mm², and the elongation increased to 7.45%. Meanwhile, at 800°C, the tensile strength continued to decrease to 518.86 N/mm², the yield strength dropped significantly to 306.35 N/mm², and the elongation decreased to 4.8%. Hardness testing showed that the lowest hardness value occurred at 600°C with Base Metal (200.7 HV), Weld Area (220.4 HV), and HAZ (206.9 HV). Meanwhile, the highest hardness value was recorded at 800°C with Base Metal (214.3 HV), Weld Area (240.3 HV), and HAZ (223 HV). The highest hardness value in the Weld Area was obtained at 700°C (263.5 HV). Overall, the higher the PWHT temperature, the hardness of the material increased, but the tensile strength decreased, indicating an increasing trend in material brittleness. This study confirms that PWHT has a significant effect on the mechanical properties of AISI 1045 steel, where the increase in treatment temperature increases hardness but decreases tensile strength. Therefore, the selection of the optimal PWHT temperature needs to be considered to maintain a balance between hardness and toughness of the material in engineering applications.
PENGARUH FASILITAS BENGKEL TERHADAP MINAT BELAJAR DAN PENGUASAAN KOMPETENSI KEJURUAN SISWA SMK TEKNIK PEMESINAN DI PROVINSI GORONTALO: The Influence Of Workshop Facilities On Learning Interest And Mastery Of Vocational Competencies Of Machinery Engineering Vocational School Students In Gorontalo Province Hendra Uloli; Esta Larosa; I Wayan Rupawan
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Write the abstract in English here. If articles in English, abstract in Indonesia language do not need to be included. Writing abbreviations and mathematical formulas in the abstract needs to be avoided. The abstract consists of summary of the research objectives, approaches or methods used, important results and conclusions. This study aims to determine the effect of workshop facilities on students' learning interest and mastery of vocational competencies in the Mechanical Engineering expertise program at SMK Gorontalo Province. The background of this study is based on the importance of the role of workshop facilities in increasing students' learning interest which emphasizes mastery of competencies. The research method used is quantitative research, using path analysis to determine the relationship between two or more variables expressed by the magnitude of the correlation coefficient and statistical significance. This study discusses three variables consisting of one independent variable, namely the effect of workshop facilities (X) two dependent variables, namely learning interest (Y1) and (Y2) mastery of vocational competencies. The research sample consisted of XII students majoring in Mechanical Engineering at several state vocational schools in Gorontalo Province. Data were collected through questionnaires, The results of the analysis showed that there was a positive and significant influence between 1. workshop facilities on learning interest of 38.4 while 62.6% was influenced by other factors that were not examined, 2. Workshop facilities on competency mastery had a significant effect of 46.9% while 53.1% was influenced by other factors that were not examined. 3. Interest in learning towards competency mastery has a significant effect of 55% while 45% is influenced by other factors not studied. 4. Workshop facilities through interest in learning towards competency mastery have a significant effect of 64.20% while 35.8% is influenced by factors not studied.
Pengembangan Bahan Ajar Mata Kuliah Konversi Energi Berbasis Teknologi: Development of Technology-Based Energy Conversion Course Teaching Materials Wijaya, Rizki; Setiyo, Edi
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.100060

Abstract

This study aims to develop technology-based Energy Conversion course teaching materials using the Canva application in the form of valid and practical E-Modules. The background of this study is the limitations of conventional teaching materials that are less interactive and have not utilized technology optimally, which causes low student interest and understanding of the material. The research method used is Research and Development (R&D) with the ADDIE (Analyze, Design, Development, Implementation, Evaluation) development model. The subjects of the study were students of Mechanical Engineering Education, Sriwijaya University, class of 2022. The validation results by material experts and media experts showed that the E-Module developed was in the "Very Valid" category, with an average score of 4.6 and 4.5, respectively. The practicality trial conducted through the One-to-One, Small Group, and Field Test stages also showed that the product is included in the "Very Practical" category, with an average score of 4.25 for the One-to-one trial, 3.83 for the Small Group trial and 4.05 after being tested on all 2022 class Palembang students (Field Test). Thus, the development of this Technology-based E-Module is declared suitable for use as an alternative teaching material that can increase the effectiveness of learning and student understanding in the Energy Conversion course
UPAYA SEKOLAH DALAM PENERAPAN KESELAMATAN DAN KESEHATAN KERJA (K3) DI BENGKEL PEMESINAN SMK NEGERI 2 MUARA ENIM: School Efforts In Implementing Occupational Safety And Health (Osh) In The Machine Shop Of Smk Negeri 2 Muara Enim Agustri, Adytia; Nopriyanti
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.101043

Abstract

This research aims to determine how schools implement Occupational Safety and Health (OSH) in the machining workshop of SMK Negeri 2 Muara Enim. This research is a naturalistic study, with data collection techniques using in-depth interviews. The data sources for this research employed snowball sampling techniques, starting with the head of the machining workshop and the machining teachers. Data analysis in this study used the Miles, Huberman & Saldana data analysis model with the assistance of Nvivo 12 Pro software. The results of this study indicate that SMK Negeri 2 Muara Enim shows serious efforts in implementing Occupational Safety and Health (OSH), particularly in the machining workshop through OSH training, OSH culture, routine maintenance, and the provision of adequate facilities.
Pengaruh Variasi Lebar Ban Terhadap Efisiensi Dan Konsumsi Energi Pada Kendaraan Listrik: The Effect of Tire Width Variations on Efficiency and Energy Consumption in Electric Vehicles Lastika, I Gusti Kadek Dodi; I Made Mara; I Dewa Ketut Okariawan
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.101804

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi lebar ban terhadap konsumsi energi dan efisiensi energi pada kendaraan listrik prototipe. Metode eksperimen dilakukan menggunakan tiga variasi lebar ban: 1.75 × 16 – 1.75 × 20 inci, 2.25 × 16 – 2.25 × 20 inci, dan 2.50 × 16 – 2.30 × 20 inci. Pengujian dilakukan pada malam hari dengan lintasan aspal sepanjang 6,7 km, menggunakan teknik eco-driving untuk memastikan konsumsi energi yang efisien. Data konsumsi energi (Wh/km) dan efisiensi energi (km/Wh) diukur menggunakan joulemeter. Hasil pengujian menunjukkan bahwa lebar ban memengaruhi konsumsi energi dan efisiensi energi secara signifikan. Ban berukuran 1.75 × 16 – 1.75 × 20 inci memberikan konsumsi energi terendah sebesar 24,9 Wh/km dengan efisiensi energi 0,040 km/Wh, sedangkan ban berukuran 2.50 × 16 – 2.30 × 20 inci memiliki konsumsi energi tertinggi sebesar 43,5 Wh/km dengan efisiensi energi 0,022 km/Wh. Temuan ini menegaskan bahwa pemilihan lebar ban yang tepat dapat meningkatkan efisiensi daya pada kendaraan hemat energi, terutama untuk kategori prototipe. This study aims to analyze the effect of tire width variation on energy consumption and energy efficiency in a prototype electric vehicle. The experimental method was carried out using three tire width configurations: 1.75 × 16 – 1.75 × 20 inches, 2.25 × 16 – 2.25 × 20 inches, and 2.50 × 16 – 2.30 × 20 inches. Tests were conducted at night on a 6.7 km asphalt track using an eco-driving technique to ensure efficient energy consumption. Energy consumption (Wh/km) and energy efficiency (km/Wh) were measured using a joulemeter. The results showed that tire width significantly affects energy consumption and energy efficiency. The 1.75 × 16 – 1.75 × 20 inch tire configuration yielded the lowest energy consumption of 24.9 Wh/km with an energy efficiency of 0.040 km/Wh, while the 2.50 × 16 – 2.30 × 20 inch tires recorded the highest energy consumption of 43.5 Wh/km with an efficiency of 0.022 km/Wh. These findings emphasize that proper tire width selection can enhance power efficiency in energy-efficient vehicles, particularly for prototype categories.
Pengaruh Submergence Ratio dan Debit Udara Terhadap Performa Airlift Pump Dua Fase Dengan Sudut Injektor 30o: Effect of Submergence Ratio and Air Flow Rate on the Performance of a Two-Phase Airlift Pump with a Injector Angle 30° Muchammad Insan Brilian; Nurmala Dyah Fajarningrum; Nur Hayati
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i2.101916

Abstract

The airlift pump is a device used to lift a mixture of liquid and solid particles through a vertical pipe and is capable of continuous operation. This device serves as a cost-effective solution for water lifting applications and is resistant to solid particles that may otherwise damage conventional pump components. This study aims to evaluate the performance of a two-phase airlift pump based on variations in submergence ratio and injected air flow rate. The main focus is to examine the effects of these parameters on water discharge, the resulting flow patterns, efficiency, and effectiveness of the airlift pump. Experiments were conducted using submergence ratios of h, h, and h, and air flow rates of 30 lpm, 40 lpm, 50 lpm, and 60 lpm. The test results show that increasing the submergence ratio and air flow rate leads to an increase in water discharge and efficiency up to a certain point, after which both values begin to decline. The highest efficiency and effectiveness were recorded at an air flow rate of 40 lpm with a submergence ratio of h, yielding an efficiency of 3.34% and an effectiveness of 888.60. However, once the pump reaches its peak performance, further increases in air flow rate lead to a decrease in overall performance. The observed flow patterns include bubbly, slug, and churn flow. The bubbly flow pattern typically appears at the tail end of slug flow. The results also indicate that higher submergence ratios and air flow rates produce higher water discharge, greater efficiency, and improved effectiveness of the airlift pump.
The Analysis of the Effect of Gate Valve Leakage on Piping Systems Using the Lapping Repair Method: Analisis Pengaruh Kebocoran Gate Valve Pada Sistem Perpipaan Menggunakan Metode Perbaikan Lapping M. Roekhanum Majid; Mohammad Anshori; Pelangi Eka Yuwita
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 2 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Gate valve merupakan komponen penting dalam sistem perpipaan industri yang berfungsi mengatur dan menghentikan aliran fluida. Seiring waktu, penggunaan yang terus-menerus dapat menyebabkan kerusakan pada permukaan gate dan seat, seperti aus dan korosi, yang mengakibatkan terjadinya kebocoran internal. Penelitian ini bertujuan untuk menganalisis seberapa efektif perbaikan menggunakan metode lapping dapat mengurangi tingkat kebocoran pada gate valve, serta mengevaluasi kinerja melalui simulasi menggunakan perangkat lunak Autodesk Inventor. Metode lapping diterapkan untuk menghaluskan dan meratakan permukaan yang rusak agar fungsi gate valve dapat kembali optimal. Pengujian dilakukan dengan metode hydrotest untuk mengukur tingkat kebocoran secara langsung, serta simulasi tekanan dengan variasi tekanan antara 500 psi hingga 3000 psi. Hasil penelitian menunjukkan bahwa perbaikan dengan metode lapping secara signifikan mampu mengurangi kebocoran internal, yang terlihat pada hasil uji langsung maupun visualisasi simulasi. Analisis statistik menggunakan uji paired t-test menunjukkan terdapat perbedaan yang signifikan antara kondisi sebelum dan sesudah perbaikan.   Gate valves are essential components in industrial piping systems that regulate and stop fluid flow. Over time, continuous use can cause damage to the gate and seat surfaces, such as wear and corrosion, resulting in internal leaks. This study aims to analyze the effectiveness of repairs using the lapping method in reducing gate valve leakage levels, and evaluate performance through simulations using SolidWorks Flow Simulation software. The lapping method is applied to smooth and level the damaged surface so that the gate valve can function optimally again. Tests were conducted using the hydrotest method to directly measure the leakage level, as well as fluid flow simulations with pressure variations between 500 psi and 3000 psi. The results showed that repairs using the lapping method were significantly able to reduce internal leaks, as seen in the results of direct tests and simulation visualizations. Statistical analysis using a paired t-test showed a significant difference between the conditions before and after repair.

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