Portland Community College | Portland, Oregon

Course Number:
WLD 101
Course Title:
Welding Processes & Applications
Credit Hours:
4
Lecture Hours:
40
Lecture/Lab Hours:
0
Lab Hours:
0
Special Fee:
$12.00

Course Description

Covers welding processes, safety, equipment, and essential variables of operation. Audit available.

Addendum to Course Description

This is an outcome based course utilizing a lecture format. This course includes, but is not limited to: classroom discussions, multimedia presentations, and lab demonstrations covering technical skills. Course outcomes will include: technical concepts, safety and fundamentals of operation.

Intended Outcomes for the course

Upon completion of the course students will be able to:

  • Function safely in the PCC Welding Lab.
  • Operate the oxy-fuel welding and cutting systems in accordance with industry standards.
  • Understand and apply fundamentals of SMAW Operations.
  • Understand and apply fundamentals of GTAW Operations.
  • Understand and apply fundamentals of GMAW Operations.
  • Understand and apply code requirements for FCAW.
  • Operate the Plasma Arc Cutting (PAC) hand held system in accordance to industry standards.
  • Operate the Carbon Arc Cutting - Air (CAC-A) system in accordance to industry standards.

Course Activities and Design

The course syllabus will identify the methods used to assess student progress and the criteria for assigning a course grade. 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 and written assignments.

Course Content (Themes, Concepts, Issues and Skills)

Function safely in the PCC Welding Lab.

  • Understand and practice personal safety by using proper protective gear

  • Understand and practice power tool safety

  • Understand and practice equipment safety for welding and oxy-fuel cutting systems

  • Understand and maintain a safe work area

    • Recognize and report dangerous electrical and air/gas hose connections

    • Understand and practice fire prevention

Demonstrate the operation of the oxy-fuel welding and  cutting systems in accordance with industry standards.

  • Understand theory of operation

  • Demonstrate correct setup, operation and shutdown procedures for oxy-fuel system

  • Discuss care, storage, and handling of cylinders.

  • Compare and contrast cylinder construction of acetylene and oxygen cylinders               

  • Interpret oxygen fuel gas cutting chart to adjust pressures.

  • Identify flame types.

Understand and apply fundamentals of SMAW Operations.

  • Describe and demonstrate equipment setup, shut down, and operation

  • Identify  electrode types and characteristics

  • Describe electrical characteristics of a welding power source

  • List common causes of arc blow.

  • Define American Welding Society's electrode classification system.

  • Explain the importance of matching alloyed electrodes to the base metal to be welded.

Understand and apply fundamentals of GTAW Operations

  • Describe Fundamentals of operation

  • Describe and demonstrate equipment setup, shut down, and operation

  • Identify  electrode types

  • Describe electrical characteristics of a welding power source

  • Analyze the control board to determine the function of all the controls.

  • Identify the different types of GTAW welding torches and components .

  • List the types of tungsten used as electrodes and explain the AWS classification system.

  • List the methods by which the tungsten is prepared.

Understand and apply fundamentals of GMAW Operations

  • Describe the fundamentals of Operation

  • Describe and demonstrate equipment setup, shut down, and operation

  • Identify  electrode types

  • Describe typical applications for GMAW welding.

  • Explain the term constant-voltage and constant current as related to GMAW welding.

  • Define GMAW Metal Transfer modes

  • Explain the AWS classification system.

Understand and apply code requirements for FCAW

  • Describe the fundamentals of Operation.

  • Describe typical applications for FCAW welding.

  • List the equipment which is needed for FCAW welding

  • List the similarities between GMAW and FCAW.

  • Explain the AWS classification system for FCAW electrodes.

  • List the polarity needed for common electrodes.

  • Describe the function of the flux.

Demonstrate the operation of Plasma Arc Cutting (PAC) hand held system in accordance to industry standards.

  • Demonstrate correct setup and shutdown procedures

  • Explain how safety interlocks function as they relate to associated tip parts

  • Adjust current and air pressure for material being cut 

  • Demonstrate the effects of the following variables:

    • Stand Off

    • Amperage setting

    • Air pressure

    • Travel speed.

  •  Demonstrate correct PAC cutting techniques on steel 

Demonstrate the operation of Carbon Arc Cutting - Air (CAC-A) system in accordance to industry standards.

  • Demonstrate correct setup and shutdown procedures

  • Adjust current and air pressure for size of electrode being used 

  • Explain CAC-A electrode shapes and their uses

  • Demonstrate the effects of the following variables: electrode angle, amperage setting, air pressure, and travel speed

  • Demonstrate correct CAC-A gouging techniques on steel

  • Identify electrodes and describe their arc characteristics and use

  • Explain process variables and demonstrate the effects of:

    • Current

    • Travel speed  

    • Electrode angle

    • Arc length