Portland Community College | Portland, Oregon

Course Number:
WLD 222
Course Title:
Gas Tungsten Arc Welding: Aluminum
Credit Hours:
4
Lecture Hours:
0
Lecture/Lab Hours:
80
Lab Hours:
0
Special Fee:
$24.00

Course Description

Develops knowledge and skills required to weld common joints in all positions on aluminum using the gas tungsten arc welding (GTAW) process. Prerequisites: Department permission required. Audit available.

Addendum to Course Description

This is an outcome based course utilizing a lecture/lab format. This course includes classroom discussions, videotapes, and lab demonstrations of technical skills.  Course outcomes will include: theoretical concepts, layout, fabrication, welding and safety.

Intended Outcomes for the course

Upon completion of the course students should be able to:

  • Function safely in the PCC Welding Lab.
  • Interpret blueprints to accurately lay out, prepare and assemble weld joints.
  • Understand and apply fundamentals of GTAW operations on aluminum.
  • Weld common joints assemblies with gas tungsten arc welding to AWS D1.1 Structural Steel Welding Code visual acceptance criteria in all positions.
  • Apply visual examination principles and practices in accordance with AWS D1.1.

Course Activities and Design

Welding lec/lab courses are Open -Entry and Open Exit (OE/OE) and are offered concurrently. Courses are designed to meet the needs of the student with flexible scheduling options. Students may attend full time or part time. This is an OE/OE course which does not align with the normal academic calendar.

Outcome Assessment Strategies

The student will be assessed on his/her ability to demonstrate the development of course outcomes. The methods of assessment may include one or more of the following: oral or written examinations, quizzes, written assignments, visual inspection,welding tests and task performance.   

Course Content (Themes, Concepts, Issues and Skills)

Function safely in the PCC Welding Shop.

  • Understand and practice personal safety by using  proper protective gear
  • Understand and practice hand and power tool safety
  • Understand and maintain a safe work area
  • Recognize and report dangerous electrical and air/gas hose connections
  • Understand and practice fire prevention

Interpret drawing and symbols to accurately lay out,  prepare and assemble weld joints on aluminum.

  • Interpret lines, symbols, views and notes
  • Lay out material per drawing specifications
  • Assemble project per specification

Understand and apply fundamentals of GTAW operations on aluminum.

  • Describe and demonstrate equipment setup, shut down and operation
  • Identify electrode types and preparation
  •  Demonstrate proper arc length and travel speed
  • Demonstrate correct starting, stopping and restarting techniques
  • Demonstrate proper bead placement 

Weld common joints with the Gas Tungsten Arc Welding (GTAW) to AWS code quality visual acceptance criteria in the following joints and positions.

Demonstrate correct welding techniques on the following joints:

Flat Position:

  • Fuse weld a flat position edge joint
  • Fuse weld a flat position corner joint
    • Bead Plate
    • T-Joint
    • Butt Joint

Horizontal Position:

  • T-Joint
  • Lap Joint
  • Outside Corner Joint
  • Butt Joint

Vertical Position:

  • T-Joint  
  • Lap Joint
  • Outside Corner Joint
  • Butt Joint

Over head Position:

  • T-Joint
  • Lap Joint
  • Outside Corner Joint           

Demonstrate visual examination principles and practices in accordance with AWS D1.1

Evaluate welds using appropriate welding inspection tools

Assess weld discontinuities causes  and corrections