Module 3

Module Three (29103-15) introduces the trainees to the methods and procedures related to the plasma arc cutting process. Trainees will learn safety procedures, equipment setup, gas types, flow rates, and techniques.

Objectives

Learning Objective 1

• Explain plasma arc cutting processes and identify related safety precautions.

a. Describe the plasma arc cutting processes.

b. Identify safety practices related to plasma arc cutting.

Learning Objective 2

• Identify and describe plasma arc cutting equipment.

a. Identify and describe plasma arc power units.

b. Identify and describe plasma arc torches and accessories.

c. Identify and describe plasma arc cutting gases and gas control devices.

Learning Objective 3

• Describe how to set up, safely operate, and care for plasma arc cutting equipment.

a. Describe how to set up plasma arc cutting equipment and the adjacent work area.

b. Describe how to safely operate plasma arc cutting equipment.

c. Describe how to care for plasma arc cutting equipment.

Performance Tasks:

Performance Task 1 (Learning Objectives 1, 2, and 3)

• Set up plasma arc cutting equipment.

Performance Task 2 (Learning Objectives 2 and 3)

• Set the amperage and gas pressures or flow rates for the type and thickness of metal

to be cut using plasma arc equipment.

Performance Task 3 (Learning Objective 3)

• Square-cut metal using plasma arc equipment.

Performance Task 4 (Learning Objective 3)

• Bevel-cut metal using plasma arc equipment.

Performance Task 5 (Learning Objective 3)

• Pierce and cut slots in metal using plasma arc equipment.

Performance Task 6 (Learning Objective 3)

• Dismantle and store the equipment.

Equipment and Materials for Laboratories and Performance Testing

Appropriate PPE:

Appropriate flame-retardant clothing

Eye and face protection, properly tinted

Welding or cutting gloves

Proper footwear as designated by the instructor or training facility provider

Hearing protection as designated by the instructor or training facility provider

Hard hat or welding helmet as designated by the instructor or training facility provider

Plasma arc cutting power units and accessories

Clean, dry compressed air supply

Other gases (if required)

Gas pressure regulators (if required)

Plasma torch cutting guides

Sufficient carbon steel plate for all trainees to create the specified workpieces

Soapstone

Tape measures or steel rules

Squares Wire brushes

Additional Resources

This module presents thorough resources for task training. The following resource material is suggested for further study:

AWS F3.2M/F3.2, Ventilation Guide for Weld Fume.

Latest Edition. Miami, FL: American Welding Society.

Plasma Cutters Handbook: Choosing Plasma Cutters, Shop Safety, Basic Operation, Cutting Procedures, Advanced Cutting Tips, CNC Plasma Cutters,

Troubleshooting, and Sample Projects. Eddie Paul. New York, NY: Penguin Group.

There are a number of on-line resources available for trainees who would like more information on plasma arc cutting. A search for additional information may be assigned as homework to interested trainees.