About Welding and Types

1. Welding
By: Ryan Black

2. Areas Covered
• Types of welding processes
• Types of welding joints
• Types of welds and weld symbols

3. Types of Welding Processes
• Brazing
• Oxyfuel gas welding
• Arc welding
• Mig welding
• Tig welding
• Resistance welding
• Electronic beam welding

4. Brazing
• The process that joins
metals by adhesion with
low melting point filler
metal
• Parent metal is not
melted
• Copper is common filler
metal

5. Oxyfuel Gas Welding
• Process in which the heat generated by
burning gases cause the parent metal to melt
and fuse into one piece
• Sometimes a filler metal is used
• The most common oxyfuel process used is
oxyacetylene welding

6. Arc Welding
• Process in which
heat is produced by
an electric arc
between a welding
electrode and the
parent metal

7. MIG Welding
• Metal inert gas welding
• A gas shielded arc welding
process which creates a
clean weld
• The electrode is a filler wire
that is fed ito the weld
automatically
• Metals ¼” thick or thicker

8. TIG
• Tungsten inert gas
• Gas shielding arc welding
process which creates a clean
weld
• Uses a tungsten electrode to
maintain intense heat and a
metal filler rod can be added
• Metal ¼” or less
• Most aluminum is TIG welded

9. Resistance Welding
• An electric current is the
source of heat.
• Pressure is applied to
bring the parts together at
the point of weld
• Common type of
resistance welding is spot
welding

10. Induction Welding
• Heat is generated by the resistance of the
metal parts to flow of an induded electric
current
• Can be done with or with out pressure

11. Electronic Beam Welding
• A high intensity beam of
electrons focused in a small area
at the surface to generate heat for
welding
• This process provides greater
control over other processes
• Done in a vacuum to make a
cleaner weld
• Small amount of distortion
because heat is concentrated in a
small area

12. Welding Joints
• There are five
basic joints
• Butt
• Corner
• Tee
• Lap
• edge

13. Common Weld
Types

14. Weld Symbols

15. Symbols and
Their
Interpretation

16. Bibliography
• Drafting and Design
Seventh Edition, pg.
779-789