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What to create	Lesson script
Which subject	Design and technology
What topic	Mig welding for beginners
What length (min)	30
What age group	Doesn't matter
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Lesson Script: MIG Welding for Beginners

Duration: 30 Minutes

Objective

By the end of this lesson, students will understand the fundamentals of MIG welding, including its processes, equipment, safety measures, and basic techniques.

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1. Introduction to MIG Welding (5 Minutes)

What is MIG Welding?

MIG (Metal Inert Gas) welding is a welding process that uses a continuous solid wire electrode and a shielding gas to join metals together. It’s widely used due to its versatility and the ease of learning for beginners.

Applications of MIG Welding

MIG welding is commonly used in automotive repair, manufacturing, and home projects. Understanding this process opens up various opportunities in design and technology fields.

2. Equipment Required for MIG Welding (10 Minutes)

2.1. MIG Welding Machine

The core of the MIG welding setup is the MIG welding machine, which controls the heat and wire feed. It consists of:

• Power Source: Converts electricity to the appropriate voltage and current.
• Wire Feed Unit: Automatically feeds the welding wire.
• Control Panel: For setting adjustments according to the project.

2.2. Electrode Wire

The electrode wire comes in various diameters and compositions, with common types including ER70S-6 for mild steel.

2.3. Shielding Gas

The shielding gas protects the weld from contamination. The most popular combination for beginners is a mix of Argon and Carbon Dioxide (commonly known as C25).

2.4. Personal Protective Equipment (PPE)

Safety is paramount in welding. Required PPE includes:

• Welding Helmet: To protect eyes and face from UV rays and sparks.
• Gloves: Heat-resistant gloves designed for welding.
• Protective Clothing: Flame-resistant materials, including jackets and aprons.

2.5. Additional Tools

• Wire Brush and Chipping Hammer: For cleaning the weld area.
• Clamps: To hold workpieces securely.
• Measuring Tools: For precise measurements in your welding projects.

3. Safety Measures (5 Minutes)

Safety in MIG welding cannot be overstated. Here are some essential safety practices:

• Ventilation: Ensure proper airflow to avoid inhaling harmful fumes.
• Flammable Materials: Keep the work area clear of flammable materials to prevent fires.
• Emergency Training: Know the location of fire extinguishers and how to use them.
• Inspection of Equipment: Regularly check your welding machine and PPE for any wear and tear.

4. Basic MIG Welding Techniques (5 Minutes)

4.1. Setting up the Equipment

• Connect the MIG torch, grounding clamp, and gas supply.
• Adjust settings for current and wire feed speeds based on the material thickness you are working with.

4.2. Welding Process

1. Preparation: Clean the metal surfaces to ensure a strong weld.
2. Tack Welding: Begin with tack welds to hold pieces together.
3. Welding Movement: Use a steady hand and maintain a consistent speed with a slight angle to the workpiece.
4. Cooling Down: Allow the weld to cool, avoiding rapid cooling which could cause warping.

5. Practice Session (5 Minutes)

Now that we've covered theory, it’s time for some hands-on practice. Pair up with a classmate or work on assigned welding projects. Remember to:

• Use proper body positioning and movement.
• Focus on maintaining a steady hand.
• Observe and critique each other’s welds for improvement.

6. Conclusion and Q&A (5 Minutes)

In summary, we have explored the basics of MIG welding, from equipment setup and safety to basic techniques.

Questions and Answers: Now, let’s open the floor to any questions you may have. Feel free to ask about anything that was unclear or any specific welding scenarios you’d like to discuss.

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Homework Assignment

To reinforce your learning, complete the following:

1. Research a specific application of MIG welding and write a one-page report.
2. Prepare a checklist for setting up your welding station for a project.

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Closing

Thank you for your participation in today’s lesson on MIG welding for beginners. Remember, practice makes perfect! Happy welding!