Blueprint Reading for Welders

Table of Contents

Chapter 1: Shop Math and Measurement

Topics: Fractions; Common fractions; Reducing common fractions; Improper fractions; Mixed numbers; Calculations involving common fractions; Shortcuts for working with common fractions; Decimal fractions; Calculations involving decimal fractions; Converting common fractions to decimal fractions; Converting decimal fractions to common fractions; Standard rules and tape measures; Reading a rule or tape measure; Using a calculator

Learning Objectives:

• Define and identify common fractions and decimal fractions.
• Define the term equivalent fraction.
• Perform calculations using common fractions and decimal fractions.
• Convert between common fractions and decimal fractions.
• Read and perform measurements using a standard rule or tape measure.
• Explain the use of calculators in welding

Chapter 2: Introduction to Blueprints

Topics: Purpose of blueprints; Types of blueprints; Making blueprints; Parts of a blueprint; Body; Title block; Bill of material; Revision block; Zoning; Security; Care and handling of blueprints

Learning Objectives:

• Explain the importance of information on blueprints.
• Explain the differences between assembly drawings and detail drawings.
• Describe methods used to create and reproduce blueprints.
• Define and describe parts of a blueprint.
• Identify elements located within the title block of a detail drawing.
• List methods of care and security of blueprints.

Chapter 3: Lines and Views on Blueprints

Topics: Lines used on a blueprint; Views on a blueprint; Perspective; Orthographic projections; Oblique projections; Isometric projections; Other views; Selecting views; Sketching

Learning Objectives:

• Identify the standard lines used on blueprints.
• Explain the meaning and applications of standard lines on blueprints.
• Identify common views used on a blueprint.
• Name the advantages and disadvantages of various projection types.
• Explain the concept of visualization.

Chapter 4: Welds and Weld Joints

Topics: Basic weld joints; Butt joint; Lap joint; Tee joint; Corner joint; Edge joint; Weld types; Groove welds; Fillet welds; Plug and slot welds; Spot and seam welds; Stud welds; Surface welds; Backing welds; Welding positions and locations

Learning Objectives:

• Identify and describe the five basic weld joints.
• Define the following terms: bead, stringer bead, weave bead, base metal, filler metal, root pass, hot pass, fill pass, cap, hardfacing.
• Identify and describe the basic weld types.
• Name the basic welding positions and give advantages of the flat position.

Chapter 5: Welding Symbols

Topics: Structure of welding symbols; Reference line; Arrow; Weld symbol; Dimensions; Special symbols; Tail; Reading welding symbols

Learning Objectives:

• Identify which side of a structure a weld is to be made from.
• Identify the kind of chamfer to be cut on a joint to be welded, and which part is to be chamfered.
• State the required dimensions of a weld.
• Identify the contour required on a finished weld.
• State how a weld contour is to be finished.
• Differentiate between welds that are to be made at the site of final assembly and welds that are to be made before the parts are shipped to the site.

Chapter 6: Advanced Shop Math and Measurement

Topics: Squares and square roots; Angles; Triangles; Circles; Linear measurement; Calipers; Slide calipers; Vernier calipers; Micrometer calipers; Angular measurement; Metric measurement

Learning Objectives:

• Explain the concepts of squares and square roots of numbers.
• Define the following kinds of angles: zero degree, acute, straight, right, and obtuse.
• State the Pythagorean Theorem and explain its usefulness.
• Define the following terms related to circles: radius, diameter, arc, and circumference.
• Give the equations for finding a circle's circumference and area if you know its radius.
• Explain the use of the following measuring tools: calipers, micrometers, and protractors.
• Demonstrate how to convert measurements from inches to millimeters and from millimeters to inches.

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