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All Journal Jurnal Teknik Mesin Jurnal Teknik Mesin Jurnal Teknologi dan Vokasi
Rifqi Rifqi
Institut Teknologi Padang
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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The Effect of Electrode Angle in Forward Welding Thechnique On Fusion Depth Hafni Hafni; Rifqi Rifqi
Jurnal Teknik Mesin (JTM) Vol 9, No 1 (2019)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.698 KB)

Abstract

Shielded metal arc welding (SMAW) or manual metal arc welding (MMAW) is included in a group of fusion welding that uses heat generated by a jump in electric ions that occur between the cathode and anode (the tip of the electrode and the surface of the base metal), thus melting together. During the melting process between the electrode and the base metal is protected by a protective gas that comes from the flux of electrodes which fuses during the welding process, then in the process of freezing the flux floats above the weld metal turns into slag, this slag serves to hold the cooling rate on the metal weld. Penetration (fusion depth) of weld metal on base metal is greatly influenced by heat input. This heat input is also influenced by the welding technique and the electrode angle. In this research, advanced welding techniques are used, namely smelting occurs in front of the electrode and the electrode angle is 70°, 75°, 80o, 85o and 90°. the base metal used is low carbon steel ST 37, the electrode used is the AWS E 6013 electrode with a diameter of 3.2 mm with a current of 85 amperes, a voltage of 30 volts. Welding speed 2.49 mm /s. From the results of a macro photo, it can be seen that the electrode angle greatly affects the width and depth of penetration, where at the angle of the 900 electrode it has penetration: 88 µm wide and 6.6 µm depth.
The Effect of Electrode Angle in Forward Welding Thechnique On Fusion Depth Hafni Hafni; Rifqi Rifqi
Jurnal Teknik Mesin Vol 9 No 1 (2019): Jurnal Teknik Mesin Vol.9 No.1 April 2019
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2019.v9.i1.15-18

Abstract

Shielded metal arc welding (SMAW) or manual metal arc welding (MMAW) is included in a group of fusion welding that uses heat generated by a jump in electric ions that occur between the cathode and anode (the tip of the electrode and the surface of the base metal), thus melting together. During the melting process between the electrode and the base metal is protected by a protective gas that comes from the flux of electrodes which fuses during the welding process, then in the process of freezing the flux floats above the weld metal turns into slag, this slag serves to hold the cooling rate on the metal weld. Penetration (fusion depth) of weld metal on base metal is greatly influenced by heat input. This heat input is also influenced by the welding technique and the electrode angle. In this research, advanced welding techniques are used, namely smelting occurs in front of the electrode and the electrode angle is 70°, 75°, 80o, 85o and 90°. the base metal used is low carbon steel ST 37, the electrode used is the AWS E 6013 electrode with a diameter of 3.2 mm with a current of 85 amperes, a voltage of 30 volts. Welding speed 2.49 mm /s. From the results of a macro photo, it can be seen that the electrode angle greatly affects the width and depth of penetration, where at the angle of the 900 electrode it has penetration: 88 µm wide and 6.6 µm depth.
The Effect of 70o and 85o Electrode Angles on Reverse Welding Techniques On Fusion Depth Hafni Hafni; Rifqi Rifqi
Jurnal Teknik Mesin Vol 12 No 1 (2022): Jurnal Teknik Mesin Vol.12 No.1 April 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2022.v12.i1.61-64

Abstract

Shielded Metal Arc Welding is a liquid welding process (fusion welding) that produces heat from an electric arc between the electrode and the workpiece. The depth of fusion formed is determined by the heat input, the electrode angle and the welding direction. The research was conducted in the Mechanical Engineering laboratory of the Padang Institute of Technology. The test material used is low carbon steel 10 mm thick, 100 mm long and 100 mm wide. Welding is carried out on the surface of the work material as many as 4 welding lines, each of which has a distance of 20 mm. Weld length 100 mm. The specifications of the AWS E 6013 electrode are 3.2 mm in diameter. AC SMAW welding machine with a voltage of 30 Volts. Welding is carried out according to the working drawings, the welding current is 85 Ampere, the electrode angles are 700 and 850, the weld length is 100 mm and the welding direction is reversed (the electrode attracts welding fluid). From the welding, the welding speed is 2.51 mm/s for the 700 electrode angle and 2.48 mm/s for the 850 electrode angle. The heat input for each electrode angle is 1024.09 J/mm. at the 700 electrode angle has a penetration presentation of 10.85%, 1.14% greater than the 850 electrode angle. This shows that the electrode angle affects the penetration depth and weld width.
PENGARUH SUDUT ELEKTRODA 75, 85, 90 PADA LONGITUDINAL ARAH MUNDUR TERHADAP PRESENTASE PENETRASI Hafni Hafni; Rifqi Rifqi
Jurnal Teknologi dan Vokasi Vol 1 No 1 (2023): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2023.1.1.10

Abstract

Shielded Metal Arc Welding  (SMAW) merupakan salah satu dari proses pengelasan cair (fusion welding)  yang menghasilkan penyatuan yang homogen elektroda dengan logam dasar (base metal), yang disebabkan oleh  busur listrik yang menghasilkan panas tinggi meleburkan elektroda dan logam dasar (base metal) secara bersamaan dan dilindungi oleh gas pelindung dari reeaksi kimia fluk elektroda. Kedalaman fusi (depth of fusion) yang terbentuk ditentukan  oleh masukan panas ( heat input)  , sudut elektroda dan arah pengelasan. Penelitian dilakukan di laboratorium Teknik Mesin Institut Teknologi Padang. base metal  yang digunakan adalah baja karbon rendah ST 37 dengan ukuran tebal 10 mm , Panjang 100 mm . lebar 100 mm. Pengelasan dilakukan pada permukaan base metal pada posisi bawah tangan (flat position), tipe sambungan (weld type) adalah surfacing weld sebanyak 4 jalur las yang masing masing jalur mempunyai jarak 20 mm. Panjang las 100 mm . spesikasi elektroda AWS E 6013 berdiameter 3,2 mm. Mesin las SMAW arus AC dengan voltage 30 V. current 85 A. Sudut elektroda yang terukur antara elektroda dengan jalur las yaitu 750, 850, 900. Arah pengelasan mundur dimana eletroda menarik cairan las ke jalur las dan tinggi busur normal dimana jarak elektoda dengan base metal  sama dengan diameter elektroda. Dari hasil pengelasan akan diperoleh presentasi penetrasi yaitu perbandingan kedalam fusi dengan lebar.  Hasil penelitian diperoleh kecepatan pengelasan :  2,48 mm/s untuk sudut eletroda 750 ,  2,49 mm/s untuk sudut eletroda 850 dan 2,51 mm/s untuk sudut elektroda 90. Heat input untuk  sudut elektroda750  adalah 1015,93 J/mm ,  heat input untuk  sudut elektroda 850  adalah 1024,20 J/mm dan heat input untuk  sudut elektroda 900  adalah 1015,93 J/mm. Dari perbandingan lebar dengan  kedalaman fusi diperoleh ; sudut elektoda 85  mempunyai presentasi penetriasi sebesar 9,85 % lebih baik tinggi dibandingkan dengan sudut elektroda 750 mempunyai presentasi penetriasi sebesar 8,43 %, dan sudut elektroda 900 mempunyai presentasi penetrasi 8,35 %  
Co-Authors Hafni Hafni Hafni Hafni