Post on 06-Aug-2015
transcript
Welding
By: Ryan Black
Areas Covered
• Types of welding processes
• Types of welding joints
• Types of welds and weld symbols
Types of Welding Processes
• Brazing
• Oxyfuel gas welding
• Arc welding
• Mig welding
• Tig welding
• Resistance welding
• Electronic beam welding
Brazing
• The process that joins metals by adhesion with low melting point filler metal
• Parent metal is not melted
• Copper is common filler metal
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
Arc Welding
• Process in which heat is produced by an electric arc between a welding electrode and the parent metal
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
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
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
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
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
Welding Joints
• There are five basic joints
• Butt
• Corner
• Tee
• Lap
• edge
Common Weld Types
Weld Symbols
Symbols and Their
Interpretation
Bibliography
• Drafting and Design Seventh Edition, pg. 779-789