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All Journal Multitek Indonesia : Jurnal Ilmiah Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Vokasi Journal of Welding Technology Jurnal Teknologi Jurnal Polimesin Jurnal Mesin Sains Terapan
Usman Usman
Jurusan Teknik Mesin , Politeknik Negeri Lhokseumawe
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Rancang Bangun Mesin CNC Laser Engraving Berbasis Arduino untuk Edukasi Teknologi CNC Kasim, Bukhari; Usman, Usman; Sumardi, Sumardi; Razi, Muhammad; Saputra, Edi; Harmin, Amalia
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 1 (2025): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i1.11693

Abstract

Mesin laser engraving CNC merupakan suatu alat yang dapat digunakan untuk memotong dan mengukir berbagai jenis material dengan tingkat presisi yang tinggi. Penelitian ini bertujuan untuk merancang dan membangun mesin laser engraving CNC sebagai media pembelajaran bagi mahasiswa Jurusan Teknik Mesin. Proses perancangan meliputi pemilihan komponen, pembuatan rangka, dan integrasi sistem kendali berbasis Arduino controller dan software GRBL. Mesin ini dirancang untuk digunakan dalam kegiatan demonstrasi dan praktikum terkait prinsip kerja mesin CNC, pemrograman, dan pengoperasian sistem kendali numerik pada mesin. Hasil penelitian menunjukkan bahwa gerak sumbu x, y, z sebelum dikalibrasi memiliki error sebesar 80,6%, 78,2%, 76,3% dan setelah dikalibrasi sebesar 0,2%, 2,3%, 0,3% untuk setiap sumbu secara berurutan. Nilai error ini turun menjadi 0,2%, 2,3% dan 0,3% setelah proses kalibrasi sumbu x, y, dan z. Hasil tersebut menunjukkan bahwa mesin laser engraving CNC yang dibangun dapat berfungsi dengan baik, menghasilkan ukiran dan pemotongan yang presisi sesuai dengan spesifikasi yang diberikan. Penggunaan mesin ini sebagai media pembelajaran diharapkan dapat meningkatkan pemahaman mahasiswa di bidang manufaktur modern dan teknologi CNC, serta memperkuat keterampilan teknisnya
The effect of TIG welding technology parameters on the weld quality of copper material joints for heat pipe applications Azwinur, Azwinur; Kusuma, M. Hadi; Usman, Usman; Dharma, Surya
Jurnal Polimesin Vol 22, No 6 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i6.6058

Abstract

Copper is a commonly used material for heat pipe fabrication using the welding process. However, welding copper to copper presents significant challenges due to its inherent material properties. Its exceptionally high thermal conductivity facilitates rapid heat dispersion, complicating the maintenance of a stable melting zone. Furthermore, copper is prone to oxidation, which generates brittle oxides that can adversely affect weld quality. This research paper examines the relationship between TIG welding parameters—specifically current, voltage, shielding gas flow rate, and filler rods—and the mechanical properties of the resulting heat pipe material. The study involves varying the welding current at levels of 120 A, 135 A, and 150 A, along with different types of filler rods. The results indicate that both the selection of welding current and the type of filler rod significantly influence the tensile strength of copper welded joints. Notably, the use of higher currents in ERCuSi-A welding tends to decrease hardness in the HeatAffected Zone (HAZ), while producing more complex variations in hardness within the Weld Metal (WM), dependent on the interplay between heat and the chemical composition of the filler rod. Additionally, nickel in the ERCuNi filler rod contributes to an increase in weld hardness.
Thermal distribution and macrostructural characteristics of TIG-welded Cu/SS316L dissimilar joints: experimental and numerical study Azwinur Azwinur; Agus Suprihanto; Mukhsinun Hadi Kusuma; Khoiri Rozi; Usman Usman; Surya Dharma; Hamdani Hamdani
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.7838

Abstract

Dissimilar welding of copper (Cu) and Stainless Steel 316L (SS316L) presents significant challenges due to their large differences in thermal conductivity and melting temperature, which lead to asymmetric heat distribution and non-uniform penetration. This study aims to evaluate the effect of welding current on temperature distribution and macrostructural characteristics of TIG-welded Cu/SS316L joints using ERCuSi-A filler through an integrated experimental and numerical approach. Welding experiments were conducted at three current levels: 120 A, 135 A, and 150 A on 2.7 mm thick plates. Macrostructural examinations were performed to assess weld bead geometry and penetration behavior. Transient thermal simulations were carried out using ANSYS Workbench to predict temperature fields and thermal gradients. The results indicate that welding current significantly influences weld morphology and thermal behavior. At 120 A, the weld bead was relatively narrow with limited penetration on the Cu side due to rapid heat dissipation. At 135 A, a more uniform fusion profile was achieved, with simulated peak temperatures exceeding 1000°C and an improved penetration balance between Cu and SS316L. At 150 A, deeper penetration into SS316L was observed; however, the heating cycle became shorter and the temperature distribution more localized. Numerical results consistently showed asymmetric temperature fields, where heat diffused rapidly into Cu and concentrated in SS316L. The strong correlation between simulation and macrostructural observations confirms that thermal distribution governs weld geometry and penetration behavior. The 135 A current provides the most balanced fusion characteristics, making it suitable for Cu/SS316L dissimilar joints in heat-transfer applications.
Co-Authors Adi Saputra Ismy Agus Suprihanto Amalia Harmin Amalia, Ismi Anwar Fuadi Ariefin Ariefin Aris Mauliza Azwinur Azwinur Bukhari Bukhari Cut Aja Rahmawati Edi Saputra Elfiana, E. Hamdani Hamdani Indra Mawardi Khoiri Rozi M. Hadi Kusuma Muhammad Adam Pratama Muhammad Nur Muhammad Razi Muhammad Sami Mukhsinun Hadi Kusuma Nawawi Juhan Nurdin Husin Pardi, P. Qadir Sadri Ridwan, Ridwan Saifuddin MN Saifuddin MN Saifuddin Saifuddin Saifuddin Saifuddin Saifuddin Saifuddin Sami, Muhammad Sumardi . Surya Dharma Surya Dharma Wahyu Agung Almuzikri Yusuf, Ilyas Zahlul Munir Zaini Zaini Zuhaimi Zuhaimi Zulkifli Zulkifli