Welding Power Point

1. Welding Power Point Halton Auto Mike Tew

2. Oxygen • Regulator Pressure 20PSI- 35PSI • Tall Green Tanks • Power behind the flame • High Pressure • Tank volume 2500PSI

3. Acetylene • Regulator Pressure 4-5 PSI • Tanks must stay standing up. If lose of acetone, pressures can become unstable • Red small tank • Lighting fuel • Low pressure • Tank volume 250PSI • 21 PSI is when it Becomes the danger zone

4. Safety First

5. Dangers

6. Changing tips • Welding tip • Demo • Cutting tip • Demo • Never tighten tip on with a wrench • Hand tight • No oil, grease or lube • Cutting tip handle (tip nut) must be tightened with wrench • Flash backs at handles not at tanks (will not allow flash back to destroy lines)

7. Cutting and Welding

8. Checking for leaks • Order the proper torch solvent to check for leaks • Never use soap and water • Soap contains oils and can make the tanks dangerous • Turn thanks on (handles off) prime lines • Close tank valves (leave lines primed for 20-45 mins) • If regulator pressures drops you have a leak • Spray and check for bubbles

10. Lighting and shut down • A before O or up you can go • When the torches are shut down like this you reduce the chance of having the high pressure gas rush back on the low pressure gas creating an unstable mixture • Demo

11. Neutral Flame • 5000 plus degree (neutral flame) • Metal melts at 2500 degree • Kindeling temp 1400 degree (ignition temp)

12. Cutting • To properly cut the material needs Iron • Cutting is really Oxidizing • Keep tips clean • Dangers • Oxy (high pressure gas) has the possibility to push back up the Acet (low pressure gas) making it become unstable. • Don’t rest tip on material when cutting • Hissing sound is bad (to hot oxidizing flame)

13. Brazing • A-O • Equal pressures 7 Acet – 7 Oxy (neutral flame) • Light Acet, till smoke crisps • Add Oxy • Flame temp 5000 plus degree • Perg lines every time

14. Mig

15. Welding Basic Set ups • Weld by sound (bacon and eggs) • Too little Amps gun will pop • Too much volts gun will burn wire in tip • Too find the proper relationship start with AMPS HIGH and bring it down to a proper buzz • Tip 45 Degree 4mm of material • Never perg you mig gas (leave in line, so moisture can not rust inside liner)

16. Polarity • Flow of current • - to + Straight line (DCSP) • + to – Reverse line (DCRP) • Know what % is in your hand • Mig 70% + to – (DCRP) • Tig the ground (materile) melts (DCSP) • Toungston is in hand (-) 30% • Stick + to - (hand melts) • AC machines are junk

17. DCSP

18. Mig DCRP

19. TIG