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All Journal Jurnal Teknik RING Mechanical Engineering Journal of Education and Teaching Learning
Saifuddin Karim
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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OPTIMASI PARAMETER DRY MACHINING PADA PROSES PEMBUBUTAN CNC MATERIAL BAKELITE UNTUK MENDUKUNG MANUFAKTUR BERKELANJUTAN MENGGUNAKAN METODE TAGUCHI Riyanto, Obaja Eden Sentosa; Muhammad Ilman Nur Sasongko; Saifuddin Karim; Jibril Maulana; Dewi Izzatus Tsamroh; Sis Nanda Kus Andrianto
RING ME Vol 5 No 1 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i1.23600

Abstract

Penelitian ini bertujuan untuk mengoptimalkan parameter proses pemesinan kering (dry machining) pada material Bakelite menggunakan metode Taguchi, dengan fokus pada minimisasi kekasaran permukaan (Ra). Tiga parameter utama yang diuji adalah kecepatan spindle (700, 800, 900 rpm), feed rate (0,18; 0,23; 0,28 mm/rev), dan depth of cut (0,3; 0,4; 0,5 mm), yang dikombinasikan dalam desain eksperimen orthogonal array L9 (3³). Pengujian dilakukan pada mesin CNC turning LEADWELL menggunakan pahat karbida tanpa pendingin. Pengukuran nilai kekasaran permukaan dilakukan dengan surface roughness tester Mitutoyo SJ-210, dan hasil dievaluasi menggunakan rasio signal-to-noise (S/N). Hasil menunjukkan bahwa feed rate merupakan faktor paling dominan terhadap kualitas permukaan. Nilai feed rate 0,23 mm/rev menghasilkan kekasaran tertinggi, sementara kombinasi parameter optimal yaitu kecepatan spindle 800 rpm, feed rate 0,18 mm/rev, dan depth of cut 0,3 mm memberikan kekasaran permukaan terendah. Selain itu, ditemukan bahwa peningkatan kecepatan spindle cenderung meningkatkan kekasaran akibat efek termal, sedangkan depth of cut 0,4 mm menghasilkan performa terburuk dibandingkan 0,3 mm dan 0,5 mm. Metode Taguchi terbukti efektif dalam mengidentifikasi parameter optimal dengan efisiensi eksperimen tinggi, mendukung penerapan strategi pemesinan presisi berbasis prinsip manufaktur berkelanjutan tanpa pendingin.
Enhancing Heat Treatment Learning for Mechanical Engineering Students: A Comparative Study of Corrosion Inhibitor Effectiveness on Aluminium Protection Saifuddin Karim; Pradani, Yayi Febdia; Pratomo, Danang Yugo; Muhtarom, Imam; Widowati, Tamara Rahma; Wahyudi, Dian Julianto; Wulandari, Amelia Dini; Subekhi, Prido
Jurnal Teknik Vol 23 No 2 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i2.650

Abstract

Corrosion still remains a serious problem in the application of aluminum alloys, such as Aluminum 6061, which is one of the most widely used aluminum alloys in industries because of its high strength-to-weight ratio. However, the material degrades when exposed to aggressive environments, such as acidic, alkaline, or salty solutions, and the control of corrosion has been achieved with the use of synthetic chemical inhibitors, but the increasing concern of environmental and health risks has shifted attention to more eco-friendly alternatives. The present study aimed at evaluating the efficacy of three vegetable oils (coconut oil, palm oil, and soybean oil) as environmentally friendly corrosion inhibitors for Aluminum 6061, and the alloy coupons were subjected to three different corrosive solutions (hydrochloric acid, sodium hydroxide, and sodium chloride). A quantitative experimental procedure was employed to determine the corrosion rate through the measurement of the weight loss of aluminum coupons prior to and after the immersion, and the results showed that all three oils were able to reduce the corrosion rate when compared to the samples without any inhibitor. Among them, coconut oil gave the best protection, followed by soybean oil and palm oil, because the adsorption of the organic compounds and fatty acids in the oils onto the aluminum surface formed a thin layer that separated the metal and the corrosive environment. Consequently, the results also showed that the use of bio-based oils can be a promising alternative to synthetic corrosion inhibitors in industries that use aluminumbased materials.
Development of Swansoft-Based CNC Milling Simulation Module for Vocational Students : Untuk siswa SMK Negeri 1 Tuban Mella Karisma Fauzianti; Saifuddin Karim; Marsono
Journal of Education and Teaching Learning Vol.4 No.1 July (2026)
Publisher : PT MEDIA JURNAL DAN PENDIDIKAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59211/mjpjetl.v4i1.411

Abstract

The limited availability of actual CNC machines and high safety risks pose major obstacles to CNC programming education in vocational high schools. This study was conducted with the aim of developing a valid, practical, and effective Swansoft-based CNC Milling Simulation Learning Module to enhance the understanding of vocational high school students, particularly at SMK Negeri 1 Tuban. The study employed a Research and Development (R&D) model using the Define, Design, Develop, Disseminate (4D) framework. The test subjects were 33 students from class XI TP-3 at SMK Negeri 1 Tuban. Research instruments included validation sheets for media, language, and content experts; a comprehension test questionnaire; an implementation observation sheet; as well as pre-test and post-test questions. Validation results showed a percentage of 89.71% from media experts, 87.50% from language experts, and 86.46% from content experts, all categorized as "Very Good." The student comprehension test achieved a percentage of 87.47% in the "Very Good" category, and the implementation observation indicated that 94% of students were able to follow all practical steps well. The effectiveness test results showed a significant increase in the average score from 68.2 to 90.8, with an average N-Gain of 0.71 in the "High" category. The Swansoft-Based CNC Milling Simulation Learning Module was declared valid, practical, and effective for use as a self-directed learning medium for vocational high school students.
Co-Authors Danang Yugo Pratomo Dewi Izzatus Tsamroh Dian Julianto Wahyudi Imam Muhtarom Jibril Maulana Marsono Mella Karisma Fauzianti Muhammad Ilman Nur Sasongko Riyanto, Obaja Eden Sentosa Sis Nanda Kus Andrianto Subekhi, Prido Widowati, Tamara Rahma Wulandari, Amelia Dini Yayi Febdia Pradani