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All Journal Jurnal Energi Dan Manufaktur Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Jurnal Ilmiah Teknik Industri Jurnal Bakti Masyarakat Indonesia Jurnal Ilmiah Teknik Mesin Poros Prosiding Seri Seminar Nasional IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Prosiding Seminar Nasional Teknik UISU (SEMNASTEK) Jurnal Pengabdian Mitra Masyarakat
Sobron Lubis
Prodi Teknik Mesin Fakultas Teknik Universitas Tarumanagara
Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Analisis Kekuatan Tarik dan Tekuk Sambungan Las SMAW Baja AISI 1045 pada Rangka Go-kart Prototipe Mochamad Fahti Hawari; Muhammad Sobron Yamin Lubis; Abrar Riza
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.445

Abstract

The go-kart frame is subjected to static and dynamic loads, making welded-joint quality a critical factor in structural strength. This study aims to analyze the tensile and bending strength of SMAW welded joints on AISI 1045 steel with current variations of 70 A, 90 A, and 110 A (three specimens for each current variation) using E7018 electrodes through tensile testing (ASTM E8), bending testing (ASTM E190), and metallographic analysis on the base metal, weld metal, and Heat Affected Zone (HAZ). The results show that at 70 A, the tensile strength is 431.64 MPa and the bending strength is 677.66 MPa; at 90 A, they increase to 614.76 MPa and 1103.88 MPa, the highest values; and at 110 A, they slightly decrease to 601.68 MPa and 1084.21 MPa due to excessive heat input. Therefore, 90 A is the optimal parameter as it provides the best combination of strength and ductility.
Analisis Umur Pahat Karbida pada Pembubutan Baja AISI 1018 dengan Variasi Kecepatan Potong dan Gerak Makan Muhammad Farrell Mangkusubroto; Muhammad Sobron Yamin Lubis; Rosehan Rosehan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.455

Abstract

Turning is one of the most widely used machining processes in manufacturing. This study analyzes the effects of cutting speed and feed rate on carbide tool life during the turning of AISI 1018 steel using an experimental method. The experiments were conducted under dry turning conditions with cutting speeds of 44.6, 71.8, 113.2, and 178.6 m/min and feed rates of 0.14 and 0.16 mm/rev. Tool wear was evaluated based on flank wear (VB) until the wear criterion of VB = 0.30 mm, following ISO 3685. The results showed that increasing cutting speed and feed rate accelerated tool wear, resulting in shorter tool life. The maximum tool life was 27 min 52 s at a cutting speed of 44.6 m/min, while the minimum tool life was 7 min 3 s at 178.6 m/min (obtained by linear interpolation at VB = 0.30 mm). A cutting speed of 113.2 m/min and a feed rate of 0.16 mm/rev provided the best balance between machining productivity and tool life.
Karakteristik Heatsink Berlapis Tembaga dengan Proses Elektroplating dari Model Hasil Pencetakan 3D Berbahan PLA Kelvin Ferdinand. T; Harto Tanujaya; Muhammad Sobron Yamin Lubis
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.485

Abstract

This study aimed to analyze the characteristics and thermal efficiency of a three-dimensional printed Polylactic Acid (PLA) heatsink coated with copper through electroplating at different electrical currents. The heatsink was designed in CAD software, fabricated using Fused Deposition Modeling (FDM), and coated with graphite before electroplating. The electroplating process was conducted at an electrode distance of 6 cm using currents of 0.75, 1.00, and 2.00 A with a constant processing time. We compared the thermal performance of the fabricated heatsinks with that of a commercial aluminum heatsink. The results showed that the applied current affected both coating characteristics and thermal performance. The most uniform coating was obtained at 1.00 A, while 2.00 A produced a thicker but less uniform coating. The aluminum heatsink exhibited an actual efficiency of 48%, whereas the copper-plated PLA heatsink at 0.75 A achieved the highest actual efficiency of 86%, with a theoretical efficiency of approximately 91%. These results indicate that copper electroplating can improve the thermal performance of PLA heatsinks.
Pengujian Karakteristik Heat Sink 3D Print FDM Dengan Teknik Manufakturing Elektroplating Tembaga Lapis Nikel Nabil Aditya; Harto Tanujaya; Muhammad Sobron Yamin Lubis
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 2 (2026): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i2.489

Abstract

A heat sink is an electronic cooling component desained to maintain stable operating temperatures and minimize component damage caused by electrical stress. A key challenge lies in manufacturing heat sinks with complex geometries and high-quality base materials without compromising cost or production time. 3D printing is an emerging technology that enables the rapid, detailed, and convenient fabrication of products. Using the FDM 3D printing method, complex heat sink desains can be produced cost-effectively; furthermore, electroplating with copper and nickel can be applied to the printed parts to enhance thermal performance. Testing over a 16-minute period demonstrated that the heat sink performs comparably to conventional models, reaching a maximum temperature of 37.48°C.
Analisis Pertumbuhan Keausan Pahat Pada Pembubutan Material Mild Steel Muhammad Sobron Yamin Lubis; Abrar Riza; John Michel; Silvi Ariyanti
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 2 No 3 (2023): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v2i3.72

Abstract

The study of wear on tool blades when cutting metal is important because it influences work results and production costs. Increasing metal hardness demands durability and strength of the chisel bit. Long periods of use and high speeds can cause wear, damage the chisel, and affect the quality of the results and production costs. This research uses a CNC lathe with a carbide cutting edge to cut mild steel. The cutting speed varies between 170 to 190 m/min with a cutting pass of 0.3 mm/revolution, a cutting depth of 0.7 mm, and a wear criterion of 0.3 mm. Turning was carried out for 2.5 minutes, then wear was observed using an optical electron microscope. The results show abrasive wear on the side of the chisel blade (flank wear) due to friction. A cutting speed of 190 m/min took 7:25 minutes, 180 m/min took 8:09 minutes, and 170 m/min took 8:36 minutes. This research proves that cutting speed influences wear rates, with wear primarily caused by abrasive friction.
Co-Authors Abrar Riza Agasha Wiyoso Alfarezi Audy Nugraha Alfred Briantio Alif.A.H. Emilza Alifya Askolani Putri Alifya P. A Alifya Putri Askolani Ardy Pratama Daniel Joachim Ega Prasetya Hidayat Gerard Theodorus Harley Anugrah Harry Wibowo Harto Tanujaya Januar Moch Izhardaz John Michel Joshua Raharjo Kelvin Ferdinand. T Kelvin Fernando Kent Kurniawan Kevin Raynaldo Raynaldo Mochamad Fahti Hawari Muhamad Zaki Adika Muhammad Farrell Mangkusubroto Muhammad Iqbal Gimastian Muhammad Zulkarnain Nabil Aditya Raylan Alexander Relvin Rico W Rifqi Andika Putra Rosehan Rosehan Rosehan Rosehan Rosehan Rosehan Rosehan Rosehan Rosehan Rosehan Rosehan Salma Khaula Bazla Sautma Panjaitan Septian Calvin Sasiang Silvester Lam Silvester. L Silvi Ariyanti Sofyan Djamil Sofyan Djamil Steven D Steven Darmawan Steven Darmawan Yonathan Farrel Marcelino