ARC Welding

Arc welding holds great significance in mechanical engineering. It joins metals using an electric arc that creates heat. Key techniques are shielded metal arc welding, gas metal arc welding, and gas tungsten arc welding. Safety precautions, like wearing protective gear, are essential. Mastering these methods improves practical experience and learning objectives. Politeknik students will learn … Read more

Enclosed Arc Welding, or Puddle Arc Welding, joins crane rails on-site. It operates in any weather and uses a consumable electrode. The process involves placing copper shuttering over the joint, aligning the rails, and preheating them before welding. This method improves static bending strength and bending fatigue properties. The increased automation in rail enclosed arc … Read more

Arc welding requires safety measures for effective performance. Use insulated cables rated for the correct current. Ensure ventilation to reduce harmful fumes. Always wear PPE, including welding gloves and jackets. Remove coatings from metals before welding to avoid dangerous reactions. Follow OSHA standards to maintain safety. Training is another fundamental aspect. Workers should receive proper … Read more

Gas Metal Arc Welding (GMAW) is a popular arc welding process. It creates an arc between a consumable metal electrode and the workpiece. GMAW improves productivity and weld quality. This process affects weld penetration, bead geometry, and material distortion. It is suitable for materials like A516 Grade 70 steel and AISI 316L. The electrode’s diameter, … Read more

Electric arc welding uses heat from an electric arc to join materials with a welding rod. To improve safety, use insulated equipment, ensure proper grounding, and wear personal protective equipment (PPE). Recognizing welding hazards and following safety measures reduce health risks like electrical shock and eye injury. Safety protocols in electric arc welding are crucial. … Read more

Residual stresses in arc welding significantly affect the performance and durability of welded carbon steel joints. These stresses can cause brittle fractures, fatigue failures, and stress corrosion cracking. The heat-affected zone (HAZ) is especially prone to these problems, which impacts the overall reliability of the joints. Designers must account for these undesirable effects when creating … Read more

Reverse arc welding in water is a method used in underwater welding. It involves shielded metal arc welding with a waterproof electrode. The process creates an arc between the electrode and metal, generating heat for fusion. Common rods, like the E6010, help manage heat loss. Safety, especially diver safety, is crucial during this welding process. … Read more

Retinal injury from a welding arc happens when someone is exposed to non-ionizing radiation. This radiation can lead to problems like photophthalmia, keratoconjunctivitis, and cataracts. Such injuries are rare, but misdiagnosis can occur. Wearing proper eye protection during welding is essential to prevent these injuries. Symptoms of retinal injury may include severe pain, blurred vision, … Read more

Reverse polarity arc welding is adopted when a high heat concentration at the electrode is required. In this method, the electrode carries a positive charge while the workpiece is negative. This setup allows electrons to flow from the workpiece to the electrode, generating about two-thirds of the heat at the electrode and improving welding efficiency. … Read more

Shielded Metal Arc Welding (SMAW) is a versatile arc-welding process. It mainly welds ferrous metals, like low-carbon and mild steel, and nonferrous metals, including stainless steel. SMAW is economical, portable, and robust for industrial applications. It enhances mechanical properties and has extensive research support, with thousands of publications and citations. However, sustainability assessment in research … Read more