AENT 2803 ARC WELDING

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AENT 2803 ARC WELDING

• Fort Valley State University
• Dr. Curtis Borne

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1. ARC WELDING

• Page 74 in manual
• Arc welding-is the process of fusing
• metals by heat created in an electric arc

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2. TYPES OF ARC WELDERS

• A.C. and D.C. (alternating current and direct
  current)
• and (Non-generator type that produces both A.C.
  D.C. current)

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3. Define Electrode

• A core of wire covered with flux.

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4. Purpose OF Flux

• Provides a gaseous shield and slag coat that
• protects the weld from gases in the air.

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5. Symbols On Electrodes

• E6013
• E-Electric Arc, 60- Tensile strength (60,000
  PSI.)
• Third is welding position.
• 1All positions, 2Flat Horizontal only.
• 3Flat only.

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6. STARTING THE ARC

• Tapping
• Striking

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7. PARTS OF WELDER

• 1. Ground Clamp.
• 2. Electrode Holder insert bare end of electrode.
• 3. Amp selection wheel.
• 4. Start switch.

X
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8. Ground Clamp

• Clamped to table (Metal)

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9. Angle OF Electrode

• 15-20 Degrees from vertical
• Book says 80 degrees

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10. Electrode Movements

• Circles
• Crescents
• Weaves

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11. Chipping Hammer

• Removes slag.
• Slag-scab formed on top of weld.

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12. Preventing Heat Distortion

• A. Small Tack Welds.
• B. Back step-series of short of short beads.
• C. Preheating and penning with hammer.

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13. Most Commonly Used Electrode

• E6013

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14. E6011 Electrode

• Used when metal does not fit together well.

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15. Methods OF STARTING AN ARC

• A. Taping.
• B. Scratching-striking.

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Application

• Use metal you cut with the torch to make the
  following welds
• Pad of beads
• Flat Butt
• Outside Corner
• Lap
• T-weld