| Author: | Christo Ananth | ISBN: | 9788191075175 |
| Publisher: | Rakuten Kobo Inc. Publishing | Publication: | October 17, 2017 |
| Imprint: | Language: | English |
| Author: | Christo Ananth |
| ISBN: | 9788191075175 |
| Publisher: | Rakuten Kobo Inc. Publishing |
| Publication: | October 17, 2017 |
| Imprint: | |
| Language: | English |
To avoid Lack of Penetration Weld joints must not be narrow, Welding current should be adjusted to appropriate level, Electrode feed must be in a control level, Wire should be placed at the centre of grove, Arc length should not be too long, and Rotation of the chucked must be control, sufficient root opening.
To avoid Lack of Fusion Sufficient heat input, correct size of electrode should be chosen, Position of electrode should be corrected, clean weld surface before welding, Torch oscillation should not be too narrow, proper gas mixture.
To control the Undercut, travel speed should not be too long, Welding voltage should be maintained at correct level, The chosen electrode should not have large diameter, Arcs should not be too long, Clean weld surface prior to welding, Welding current must not be too high, Electrode should not be inclined at time of welding.
To eliminate use low-hydrogen welding process, increase shielding gas flow, one pre-heat or increase heat input, clean joint faces and adjacent surfaces, change welding conditions and techniques, use copper-silicon filler metal reduce heat input, use E6010 electrodes, use electrodes with basic slugging reactions. Proper alignment of tubes in root of weld joint, Bore should be concentric at ends, Welding current should be adjusted to appropriate level, Rotation of chuck must be controlled, Wire stick out should not be too short to avoid excess Penetration.
In this project all the possible welding defects occurring in Straight Tube Butt Welding Machine (STBW) is analyzed. For each type of defect the remedial action is suggested. Using these suggestions we can reduce the welding defects. The important parameters which affect the STBW were also found. They were optimized by the use of ANOVA and their optimum parameters and the critical value was calculated and verified.
To avoid Lack of Penetration Weld joints must not be narrow, Welding current should be adjusted to appropriate level, Electrode feed must be in a control level, Wire should be placed at the centre of grove, Arc length should not be too long, and Rotation of the chucked must be control, sufficient root opening.
To avoid Lack of Fusion Sufficient heat input, correct size of electrode should be chosen, Position of electrode should be corrected, clean weld surface before welding, Torch oscillation should not be too narrow, proper gas mixture.
To control the Undercut, travel speed should not be too long, Welding voltage should be maintained at correct level, The chosen electrode should not have large diameter, Arcs should not be too long, Clean weld surface prior to welding, Welding current must not be too high, Electrode should not be inclined at time of welding.
To eliminate use low-hydrogen welding process, increase shielding gas flow, one pre-heat or increase heat input, clean joint faces and adjacent surfaces, change welding conditions and techniques, use copper-silicon filler metal reduce heat input, use E6010 electrodes, use electrodes with basic slugging reactions. Proper alignment of tubes in root of weld joint, Bore should be concentric at ends, Welding current should be adjusted to appropriate level, Rotation of chuck must be controlled, Wire stick out should not be too short to avoid excess Penetration.
In this project all the possible welding defects occurring in Straight Tube Butt Welding Machine (STBW) is analyzed. For each type of defect the remedial action is suggested. Using these suggestions we can reduce the welding defects. The important parameters which affect the STBW were also found. They were optimized by the use of ANOVA and their optimum parameters and the critical value was calculated and verified.
