powered by
Center for Curriculum and Transfer Articulation
Introduction to Welding, Brazing and Cutting
Course: ABA222

First Term: 2005 Spring
 Lec + Lab   2 Credit(s)   3 Period(s)   2.7 Load  
Subject Type: Occupational
Load Formula: S


Description: Arc welding theory and safety hazards. AC, DC and AC-DC welding machines. Use of electrodes and safety requirements for arc-welding. Basic welding techniques and gas metal-arc and gas tungsten-arc welding processes. Brazing and cutting using an oxyacetylene torch



MCCCD Official Course Competencies
1. Explain the basic theory of arc welding and describe the health and safety hazards associated with arc welding. (I)
2. Describe the characteristics and uses of direct-current (DC) welding machines, alternating current (AC) machines and AC- DC arc welding machines. (II)
3. List and describe the types and uses of electrodes. (III)
4. Categorize welding electrodes according to the American Welding Society`s (AWS) classification system. (III)
5. Specify the safety requirements for welding helmets and protective clothing. (IV)
6. Make button welds, run weld beads and build a pad of beads with shielded metal-arc welding (SMAW) electrodes. (V)
7. Weld in the horizontal, vertical and overhead positions with SMAW electrodes. (VI)
8. Describe the basic setups for the gas metal-arc and gas tungsten-arc welding processes. (VII)
9. Describe the brazing process and perform basic brazing. (VIII)
10. Explain the safety precautions governing flame cutting and light and extinguish the oxyacetylene torch safely. (IX)
11. Using the oxyacetylene torch, make straight cuts on carbon steel plate. (IX)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.
 
MCCCD Official Course Outline
I. Arc welding
   A. Theory
   B. Hazards
      1. electrical shock
      2. arc radiation
      3. air contamination
      4. fire
      5. explosion
      6. burns
      7. noise
   C. Safety precautions
      1. equipment check
      2. protective clothing
      3. eye protection
      4. clean work area
      5. adequate ventilation
II. Welding machines
   A. Direct Current (DC)
   B. Alternating current (AC)
   C. AC-DC
III. Electrodes
   A. Coating classifications
      1. bare
      2. dusted
      3. flux-dipped
      4. extruded
   B. Filler materials
      1. mild steel
      2. low alloy steel
      3. aluminum
      4. nickel alloy
   C. American Welding Society (AWS) classification system
   D. Carbon electrodes
IV. Safety requirements
   A. Welding helmets
   B. Clothing
      1. gloves
      2. gauntlet sleeves
      3. apron
      4. leggings
      5. safety shoes
      6. cape
V. Arc-welding practice techniques
   A. Striking the arc
   B. Electrode angle
      1. travel
      2. work
   C. Button welds
   D. Bead welds
   E. Bead pad
   F. Joint welds
      1. butt
      2. lap
      3. tee
      4. edge and corner
VI. Position arc-welding
   A. Horizontal
   B. Vertical
      1. lap joint
      2. tee joint
      3. butt joint
   C. Overhead
VII. Inert gas welding
   A. Gas-tungsten arc welding (TIG)
      1. power source
      2. welding torch
      3. shielding gas attachments
      4. water cooling system
   B. Gas-metal arc welding (MIG)
      1. welding machining
      2. gas source
      3. control system
      4. wire feed
      5. welding gun
VIII. Brazing
   A. Fluxes
   B. Joint designs
   C. Safety precautions
IX. Flame cutting
   A. Safety precautions
      1. goggles
      2. protective clothing
      3. fire prevention
      4. cylinder care
      5. care of hoses
      6. torch safety
   B. Equipment
      1. gas cylinders
      2. regulators
      3. regulator gauges
      4. cutting torches
      5. cutting tips
      6. hoses and fittings
      7. goggles, gloves and clothing
      8. friction lighters
      9. wrenches
10. tip cleaners
   C. Setup and operation
   D. Cutting practice
 
MCCCD Governing Board Approval Date: 10/26/2004

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.