Fort Valley State University Dr. Curtis Borne AENT 2803 ARC WELDING Fort Valley State University Dr. Curtis Borne 11/14/2018 FORT VALLEY STATE UNIVERSITY

FORT VALLEY STATE UNIVERSITY 1. ARC WELDING Page 74 in manual Arc welding-is the process of fusing metals by heat created in an electric arc 11/14/2018 FORT VALLEY STATE UNIVERSITY

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) 11/14/2018

3. Define Electrode A core of wire covered with flux. 11/14/2018

FORT VALLEY STATE UNIVERSITY 4. Purpose OF Flux Provides a gaseous shield and slag coat that protects the weld from gases in the air. 11/14/2018 FORT VALLEY STATE UNIVERSITY

FORT VALLEY STATE UNIVERSITY 5. Symbols On Electrodes E6013 E-Electric Arc, 60- Tensile strength (60,000 PSI.) Third # is welding position. 1=All positions, 2=Flat & Horizontal only. 3=Flat only. 11/14/2018 FORT VALLEY STATE UNIVERSITY

FORT VALLEY STATE UNIVERSITY 6. STARTING THE ARC Tapping Striking 11/14/2018 FORT VALLEY STATE UNIVERSITY

7. PARTS OF WELDER 1. Ground Clamp. 2. Electrode Holder insert bare end of electrode. 3. Amp selection wheel. 4. Start switch. 11/14/2018 X

8. Ground Clamp Clamped to table (Metal) 11/14/2018

9. Angle OF Electrode 15-20 Degrees from vertical Book says 80 degrees 11/14/2018

10. Electrode Movements Circles Crescents Weaves /////// 8 11/14/2018

11. Chipping Hammer Removes slag. Slag-scab formed on top of weld. 11/14/2018

12. Preventing Heat Distortion A. Small Tack Welds. B. Back step-series of short of short beads. C. Preheating and penning with hammer. 11/14/2018

13. Most Commonly Used Electrode 11/14/2018

14. E6011 Electrode Used when metal does not fit together well. 11/14/2018

15. Methods OF STARTING AN ARC A. Taping. B. Scratching-striking. 11/14/2018

Application: Use metal you cut with the torch to make the following welds: Pad of beads Flat Butt Outside Corner Lap T-weld 11/14/2018