Different Types of Tack Welding Presentation
- 2. CLASSROOM RULES: 1.Respect yourself, your peers, and your teacher at all times. 2. Raise your hand and wait to be called on before speaking or leaving your seat. 3. Listen attentively while others are speaking, and participate actively in discussions.
- 3. CLASSROOM RULES: 4. Keep your electronic devices silenced and put away unless otherwise instructed by the teacher. 5. Follow instructions promptly and complete assignments to the best of your ability.
- 4. CLASSROOM RULES: 6. Stay seated until the class is dismissed, unless given permission to leave by the teacher. 7. Be responsible for your own learning and seek help when needed.
- 6. TACK WELDING by Mark Saura
- 7. Objective Perform tack welding in accordance with the welding procedures
- 8. Unlocking of Difficult Terms: 1. Fumes – a particles or substances that are dangerous to inhale. SYNONYM: Vapor, Smoke In Cebuano: Asu In Filipino: Singaw, Usok
- 9. Unlocking of Difficult Terms: 2. Preheating - is a temperature to which a metal or electrode is heated before an operation is performed SYNONYM: Warming up, Tempering In Cebuano: Pagpainit daan In Filipino: Paunang Pagpapainit
- 10. Question: What are safety precautions that need to be practiced before, during, and after performing tack welding?
- 11. Safety Measures in Tack Welding Before Tack Welding: • Ensure proper protective gear: • Inspect tools and equipment: • • Prepare the workspace:
- 12. Safety Measures in Tack Welding During Tack Welding: • Maintain correct posture and distance: • Follow proper welding techniques: • Monitor surroundings:
- 13. Safety Measures in Tack Welding After Tack Welding: • Turn off and store equipment properly: • Inspect the workpiece: • Dispose of waste materials:
- 14. Question: Since we will perform tack weld in a flat position what essential should be considered to ensure that the weld bead attach to the 2-base metal?
- 15. Answer: Correct Electrode angle. In performing tack weld in a flat position, we need to consider the angle of electrode. And that is 45 to 75 degrees.
- 16. Question: Why do we need to wear protective clothing such as welding apron and jacket?
- 17. SCIENTIFIC INTEGRATION HEAT TRANSFER Conduction This occurs when heat is transferred through direct contact. Convection This is heat transfer through a fluid (liquid or gas). Radiation: Heat can also be transferred in the form of infrared radiation, which does not require direct contact.
- 18. TLE Cookery Convection (Heat transfer through air or liquid)
- 19. TLE Cookery Conduction (Heat transfer through direct contact)
- 20. TLE Cookery Radiation (Heat transfer through electromagnetic waves):
- 21. MATH INTEGRATION Electrode Angle An acute angle is defined as an angle that is less than 90 degrees. In the context of welding, the angle of the electrode in relation to the workpiece forms an acute angle, which affects the penetration and appearance of the weld bead.
- 22. ACTVITY TIME Divide yourselves into four groups. Each group will be given a Performance task sheet in Performing Tack welding in Flat position. Read and comprehend the instruction indicated in the task sheet. You have 10 minutes to the activity
- 23. Assess your work using a performance checklist and engage in peer feedback
- 24. Your performance will be grade based on the given Rubric
- 25. Conclusion: Mastering Welding Welding is a skilled trade that requires knowledge, precision, and practice. By understanding the fundamentals and following proper procedures, you can create strong and durable welds.
Editor's Notes
- #17: Heat transfer is the process by which heat moves from one object or material to another. There are three primary methods of heat transfer: conduction, convection, and radiation. In welding, heat is generated in high amounts, and understanding how it spreads is essential for protection. Conduction: This occurs when heat is transferred through direct contact. For example, when you touch a hot object, the heat moves from the object to your skin through conduction. Convection: This is heat transfer through a fluid (liquid or gas). In welding, hot air and gases around the welding area can transfer heat to surrounding materials or objects. Radiation: Heat can also be transferred in the form of infrared radiation, which does not require direct contact. This type of heat transfer occurs when energy is emitted from a hot surface and spreads outward, much like how the sun heats the Earth. During the welding process, temperatures can reach extremely high levels, often over 1,000°C, which can cause severe burns if not properly managed. The heat produced during welding is primarily transferred to the body through conduction, as the welder is in close proximity to the hot workpiece or the welding arc.
- #21: The angle at which the electrode is held relative to the base metals can be viewed as an acute angle in a triangle.