Trust Me, I’m A Welder!

CLF2301, CLF2303, CLF2349

And I did all the welding on this PowerPoint…

Morgan Perry - AgEd 410, Spring 2013

To The Teacher: This PowerPoint covers the basics in the Core Curriculum standards for

CLF2301, CLF2303, CLF2349

Upon completion of this Welding Safety and Electrode Classification lesson, the student will be able to: (G-1) Pass a shop safety test

(G-10) Demonstrate the proper use of arc welding equipment

(G-3) Be familiar with the American Welding Society (AWS) classification for electrodes

Evaluation of knowledge: A passing score on a safety test, unit exam or quiz by the instructor

Correct identification of electrodes

Activities: Used to enhance and solidify the knowledge and skills learned during this

lesson.

Welding Safety Activities CLF2301, CLF2349: Practice changing lenses and head gear in arc welding helmets.

Practice identifying and handling arc welding equipment, making sure that all safety procedures are followed and that suitable clothing is being worn.

Welding Electrodes Activities CLF2303, CLF2349: Select six different arc electrodes and outline in writing each of their characteristics.

Weld a bead with each of the six arc electrodes and describe in writing how each electrode reacts during the welding process.

Weld various beads using DC straight, DC reverse, and AC type currents.

Today’s Objectives: What is Arc Welding

Five Types of Arc Welding

Welding Equipment

Personal Protective Equipment

Eye and Face Protection

Important Safety Rules

How to Properly Classify Electrodes

Arc Welding Arc welding is when two metals are joined together through the use of an

electric arc, or current, between a coated metal electrode and a base metal.

The Five Types of Arc Welding1. SMAW-Shielded Metal Arc Welding

2. GTAW/TIG-Gas Tungsten Arc Welding

3. GMAW-Gas Metal Arc Welding

4. FCAW-Flux Core Arc Welding

5. SAW-Submerged Arc Welding

Click here if video does not work!

Welding Equipment Power Supply

Ground Clamp

Electrode Holder/ Stinger

Slag Hammer

Wire Brush

Cables

Electrode

Tongs

The Well Dressed Welder

Leather welding gloves

Face and head protection

Leather, cotton or wool clothes

No pockets or cuffs

Close-toed, rubber soled boots

Long pants and sleeves

Personal Protective Equipment

Eye and Face Protection Helmet-Shade 10

Cover/Safety glasses-ANSI Z87.1 compliant

Face Shield

Safety Rules Secure work

Avoid electrical shock

Protect others

Never weld in a damp area

Never wear synthetic fiber clothing

Protect welding cables

Safety Rules Wear gloves and eye and proper

face protection

Dispose of electrode stubs properly

Prevent burns

Do not let the electrode stick

Use both hands

Handle hot metal with pliers or tongs

Safety Rules Weld in a well-ventilated area

Do not carry matches or lighters, and do not allow bystanders to smoke

Knowledge Check! What is the best material to use for protective clothing, footwear, and

gloves?

The darkest and most protective lens available for welding purposes is…

Where is the best place to dispose of electrodes?

Leather!

Shade 14!

In A Container!

Classification of Electrodes The American Welding Society (AWS)

has developed the following electrode classification system: The E means that the electrode is used

for electric arc welding

The first two digits indicate the tensile strength

The third digit tells you in what position the electrode can be used in

The fourth digit indicates any special characteristics of the electrode

Electrode Selection Guide:

Choosing the Correct Electrode

Electrode Diameter

Joint Design

Welding Position

Type of Welding Current

• The electrode should produce a weld metal approximately the same metallurgical properties as the parent metal.

• Choose one that will provide good arc stability, fast deposition, maximum weld strength, minimum splatter, easy slag removal, and a smooth weld bead

E-70-1-8 What does the ‘E’ stand for?

What do the next two numbers represent?

What does the third digit mean?

What does the fourth number tell you?

E means that the electrode is for electric arc welding

The tensile strength in thousands of psi

Electrode position

Electrodes special characteristics

FFA and SAE Welding Project Ideas: Work in a welding shop that specializes in

agricultural welding

Fabricate and weld a project for a fair Table or bench

Forklift fork

Art installation

Create a poster explaining the difference between different welding electrodes

Create a video demonstrating the importance of shop safety for your local Chapter to use