Claim Missing Document
Check
Articles

Found 4 Documents
Search

Perbandingan Ketangguhan Material S355G7+M Pada Pengelasan SAW (Original) dan SMAW (Repair) Dengan Metode Impact Charpy V-Notch Puspita, Roza; Rahman, Muhammad Noval; Arifin, Nurul Laili; Butar Butar, Hendra
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 6 No. 1 (2024): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2024
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v6i1.7624

Abstract

Proses pengelasan SAW menggunakan fluks yang berbentuk seperti pasir yang berfungsi melindungi logam pengisi yang mencair saat proses pengelasan agar tidak terjadinya kontaminasi dengan udara luar sehingga didapatkan hasil pengelasan yang cukup baik. Sedangkan elektroda SMAW (Shielded Metal Arc Welding) diselaputi atau dilindungi oleh fluks dengan proses pengerjaan secara manual. Penelitian ini bertujuan untuk menganalisa perbandingan hasil pengelasan dengan menggunakan metode standar WPS PS-03 (Original) dan WPS PS-03R (Repair), dengan menggunakan pengujian impact untuk mengetahui ketangguhan pada spesimen S355G7+M. Pengujian ini bertujuan untuk mengetahui ketangguhan impact pada bagian hasil pengelasan pada WPS PS-03 (Original) dan WPS PS-03R (Repair). Spesimen WPS PS-03R memiliki nilai lebih besar di bandingkan dengan spesimen WPS PS-03. Apabila nilai kekuatan spesimen semakin besar, maka semakin kuat dan tangguh pula pada spesimen tersebut. Temperatur pada spesimen sangat berpengaruh terhadap keuletan atau kegetasan suatu logam. Semakin tinggi temperaturnya maka semakin ulet logam tersebut begitupun sebaliknya.
Evaluation of magnetic particle inspection for optimizing welding quality in back gouging boom structure preparation in heavy machinery Aryswan, Adhe; Hasibuan, Apriansyah Sutan; Butar Butar, Hendra; Havwini, Tian; Gemala, Mega
Journal of Welding Technology Vol 7, No 1 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i1.5618

Abstract

This study investigates the effectiveness of Magnetic Particle Inspection (MPI) in optimizing welding preparation for the back gouging of boom structures in hydraulic mining shovels. The primary objective is to evaluate MPI's efficiency in detecting surface and near-surface defects during the pre-welding stage, thereby improving the overall welding quality of boom structures, which play a critical role in supporting heavy loads. MPI is utilized as an initial inspection method prior to Ultrasonic Testing (UT), enabling early detection of potential defects and reducing the likelihood of failures during subsequent UT evaluations. The study reveals the presence of linear and rounded discontinuities that may compromise weld integrity. By applying MPI early in the process, the need for rework during UT is minimized, resulting in cost and time savings. Furthermore, the findings of this study contribute to supporting two key organizational initiatives—People, Quality, Velocity, Cost (PQVC) and Built-in Quality (BIQ)—which aim to enhance both the efficiency and reliability of the welding process.
Kalibrasi Wire Feeder Flux Core Arc Welding (FCAW) Mengacu Pada Standar British Standard (BS) 7570:2000 Dan British Standard (BS) European Standard (EN) 50504:2008 Butar Butar, Hendra; Wijayanti, Ita; Mantik, Andrew; Syukri, Rahmat
JURNAL INTEGRASI Vol. 16 No. 2 (2024): Jurnal Integrasi - Oktober 2024
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v16i2.8515

Abstract

In the fabrication industry, the welding process plays a crucial role in both engineering and repair production processes. Continuous use of welding machines can lead to a decline in their effectiveness. Suboptimal machines may produce low-quality products. A common issue encountered is the poor quality of welds, even when each step has been aligned with the Welding Procedure Specification (WPS). One source of this problem is the welding equipment itself. The objective of this study is to calibrate arc welding equipment to ensure it remains within machine standards. Calibration is performed in accordance with BS EN 50504:2008 and BS 7570:2000. The calibration focuses on measuring constant voltage and wire feed speed (WFS). The measurement results for WFS variation indicate that it does not exceed a 10% error margin. This suggests that the WFS complies with the established standards. Consequently, the Lincoln LN-25X wire feeder speed is ready for use in fabrication and production processes.
Pengaruh Tekanan Terhadap Umur Elektroda Pada Proses Las Titik Untuk Material Flow Through Heater Fadilah, Nurul; Havwini, Tian; Butar Butar, Hendra; Mantik, Andrew William Patria; Sugondo, Ebeng; Siregar, Aulia Putri
VOCATECH: Vocational Education and Technology Journal Vol 7, No 2 (2025): December
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v7i2.213

Abstract

     AbstractThe pressure supplied to the electrode has a direct impact on the quality of the weld joint, making it one of the aspects that significantly affects the spot-welding process. The electrode's short lifespan is a major problem in resistance spot welding for high-volume vehicle manufacturing since the electrode component is crucial to the spot-welding process. The Work Instruction specifies the electrode's parameters, which include an energy storage of 209 V and an air pressure of 0.25±0.05 MPa. A charge voltage of 178 V is used throughout the welding process, with a squeeze of 9–12 seconds and a compress duration of 12 seconds. The holder holds the electrode along a length of 21 mm, with the upper and lower electrodes separated by 12 mm. The relative humidity is 70% and outside temperature is 30°C. 400-grit sandpaper is used to clean the electrode surface following 500 welds. An investigation of how electrode pressure affects electrode longevity during spot welding was carried out. The study used SolidWorks software's static and fatigue simulation techniques, modified for field circumstances. The pressing force applied to the electrode and its effect on electrode longevity were examined using this program. With a damage percentage of just 0.002%, the results demonstrated that a pressure of 0.25 MPa had no discernible effect on electrode degradation within 2100 cycles. Under this pressure, the electrode may last up to 100,000,000 cycles before failing. The study's findings indicate that the pressing process has little effect on electrode longevity.Keywords:Electrode., Lifetime., Spot welding., Solidworks simulation  AbstrakSalah satu faktor yang sangat mempengaruhi proses las titik, yaitu tekanan terhadap elektroda, karena akan secara langsung mempengaruhi kualitas sambungan pada pengelasan. Komponen elektroda sangat penting dalam metode pengelasan titik, sehingga umur pakai elektroda yang pendek menjadi masalah krusial dalam pengelasan titik resistansi pada manufaktur mobil bervolume tinggi. Parameter yang digunakan dalam menggunakan elektroda ini tercantum dalam Work Instruction, dengan Energy Storage 209 V dan Air Pressure 0.25±0.05 Mpa. Pada proses pengelasan menggunakan charge voltage 178 squeeze 9-12s dan compress 12. Jarak antara elektroda atas dan bawah 12mm, holder akan menjepit elektroda sepanjang 21mm. Suhu ruangan 30℃, kelembapan udara Rh70. Jika pengelasan sudah 500 kali, elektroda diamplas permukaannya menggunakan kertas pasir 400 CW. Adapun penelitian yang dilaksanakan untuk mengetahui pengaruh penekanan pada elektroda terhadap masa pakai dalam proses pengelasan titik. Pada penelitian yang dilakukan pengujiannya akan menggunakan metode simulasi static dan fatigue pada software solidworks dan telah diseuaikan dengan kondisi dilapangan, penggunaan software ini digunakan untuk melihat gaya tekan yang diberikan pada elektroda yang dapat mempengaruhi umur dari elektroda. Hasil penelitian sudah dilaksanakan menunjukkan bahwa tekanan sebesar 0,25 MPa tidak berdampak signifikan pada kerusakan elektroda dalam 2100 siklus karena persentase kerusakan yang didapat sebesar 0.002% serta siklus pakai yang didapatkan dengan tekanan tersebut bisa mencapai 100.000.000 untuk bisa membuat elektroda tersebut rusak. Berdasarkan hasil penelitian, disimpulkan bahwa umur pakai elektroda tidak dipengaruhi secara signifikan oleh proses penekanan.Kata Kunci:             Elektroda., Umur pakai., Las titik., Uji simulasi Solidworks