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PELATIHAN PENGELASAN SMAW UNTUK SISWA JURUSAN TKRO SMK MANDIRI CIREBON Leo Van Gunawan; Muhammad Ghozali; Mohammad Amat; Sukroni Sukroni; Nota S
Jurnal Pengabdian kepada Masyarakat (NADIMAS) Vol 2 No 1 (2023): Jurnal Pengabdian kepada Masyarakat (Nadimas)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.627 KB) | DOI: 10.31884/nadimas.v2i1.23

Abstract

Alumni from study program of TKRO SMK Mandiri Cirebon are the most be at work in the industry. However, from several alumni working in the industry, there are some students working not according to their field. They are placed at manufacturing and welding. This community service activity provides SMAW training to student in the study program TKRO SMK Mandiri Cirebon as a provision for work or entrepreneurship. SMAW is the most commonly used welding in Indonesia. This training was carried out using the pre-experimental method type one group pretest-posttest design. The training activity begins with giving a pretest, theory learning, practice and closing with a posttest. Analysis value of pretest and posttest results was carried out using the Gain test formula. The results of value analysis get average N-Gain 0.414226. Based on N-Gain criteria, the value of 0.414226 is included in medium category. It can be concluded that the effectiveness of this training activity has a medium impact to increasing knowledge and skill students in SMAW Welding.
Pengaruh Variasi Suhu Tempering Terhadap Hasil Pengelasan Elektroda SMAW E6013 Pada Baja SS400 Leo Van Gunawan; Muhammad Luthfi; Muhamad Ghozali; Sukroni Sukroni; Mohammad Azwar Amat
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1384

Abstract

E6013 merupakan elektroda pengelasan Shield Metal Arc Welding (SMAW) yang sering digunakan dalam industri konstruksi bangunan maupun galangan kapal. Selain harganya yang murah, elektroda ini juga dapat digunakan pada segala macam posisi pengelasan serta dapat digunakan pada mesin Las AC / DC. SS400 merupakan jenis baja karbon rendah yang paling banyak digunakan dalam pembuatan konstruksi bangunan maupun kapal. Baja SS400 dituntut memiliki sifat mekanik logam yang mampu menahan tegangan pada konstruksi bangunan maupun kapal, sehingga diperlukan proses tempering pada material pengelasan untuk menghilangkan tegangan sisa dan meningkatkan keuletan material. Tujuan penelitian ini adalah untuk mengetahui pengaruh variasi suhu tempering terhadap pengelasan baja SS400. Posisi pengelasan yang digunakan dalam penelitian ini adalah 1G dengan kampuh single V-Groove. Metode penelitian yang digunakan adalah experimen. Spesimen dibagi menjadi dua kelompok yaitu kelompok kontrol dan kelompok experimen. Kelompok kontrol berisi spesimen hasil pengelasan yang tidak diberikan perlakuan tempering. Kelompok experimen berisi spesimen hasil pengelasan yang diberikan variasi suhu tempering. Hasil pengujian tarik material menunjukan peningkatan tertinggi akibat pengaruh suhu tempering sebesar 541,195 MPa pada suhu 200°C. Penurunan tertinggi kekerasan material pada suhu 350°C sebesar 165,69 HV. Tumbuhnya butiran ferrit pada struktur mikro material juga mengindikasikan semakin uletnya material hasil pengelasan setelah dilakukan proses tempering. Hasil penelitian ini dapat digunakan sebagai alternatif cara untuk meningkatkan keuletan material hasil pengelasan khususnya pada baja SS400.
PERANCANGAN BIOGAS MODEL LANDFILL GAS SEBAGAI BAHAN BAKAR ALTERNATIF yusup Nur Rohmat; Sukroni Sukroni; Emin Haris; Tito Endramawan; Muhammad Andrian
EMPIRIS : Jurnal Sains, Teknologi dan Kesehatan Vol. 1 No. 3 (2024): EMPIRIS : Jurnal Sains, Teknologi dan Kesehatan, September 2024
Publisher : Lembaga Pendidikan dan Penelitian Manggala Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62335/1jvqzy72

Abstract

The use of cooking fuel, both in businesses and households, is essential, especially given the lack of alternatives to LPG following the fuel transition. The rise in global oil prices due to fuel shortages has become a global issue. Biogas, produced through the anaerobic fermentation of organic waste by bacteria, generates methane gas that can be utilized as an alternative energy source. Therefore, a landfill gas model biogas machine was designed to convert organic waste, such as cow manure and tofu liquid waste, into alternative fuel. The machine is equipped with a microcontroller system for automatic valve operation and gas pressure monitoring. Static load simulation on the machine frame using SolidWorks software showed that the maximum stress experienced was 10.4 x 10^6 N/m², well below the material's yield strength of 203.9 x 10^6 N/m², indicating safety. The displacement simulation on the machine frame ranged between 0.1–0.2 mm in the loaded areas, and the resulting factor of safety (FOS) was 19.5, signifying a highly safe design (FOS > 1).
Co-Authors Haris, Emin Leo Van Gunawan Mohammad Amat Mohammad Azwar Amat Muhamad Ghozali Muhammad Andrian Muhammad Luthfi Nota S Nur Rohmat, Yusup