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Blueprint Reading for Machine Tool Operators

DRF 124

Blueprint Reading for Machine Tool Operators

DRF 124

Course Description

Prerequisite: DRF 120. Instructs machinists, lathe operators, mill operators, and grinder operators in more in-depth treatment of working drawings, supplementary views and information, materials and processes commonly found in machining drawings. (30-0)

Outcomes and Objectives

Interpret dimensional tolerances.

Objectives:

  • Explains the purpose of tolerance dimension
  • Describes the techniques of displaying tolerance dimension
  • Recognizes standard tolerance blocks

Interpret common surface finish notations.

Objectives:

  • Interprets the following surface finish conditions: waviness, roughness height, lay, and roughness width cutoff

Recognize standard blueprint machining terms.

Objectives:

  • Correctly interprets the following terms: fillet, runout, reaming, counterbore, countersink, spotface, chanfer

Interpret gear drawings.

Objectives:

  • Explains the basic gear theory
  • Explains the meaning of the common gear terms used on industrial prints
  • Describes how to calculate additional gear data from handbook tables

Interpret the properties of ferrous, non-ferrous and plastics.

Objectives:

  • Names the basic types of materials used in industry
  • Describes the difference between iron and steels
  • Lists the different types of steels
  • Explains the importance of carbon content in steels
  • Explains the steel classification numbering system
  • Lists the common types of non-ferrous metals
  • Lists the common types of plastics

Correctly interpret the symbols of geometric dimensioning.

Objectives:

  • Explains why geometric dimensioning is needed
  • Defines the common geometric dimensioning terms
  • Lists the basic rules of geometric dimensioning
  • Describes how feature control frames (symbols) are displayed on industrial prints

Interpret the basics of numerical control and interpret NC blueprints.

Objectives:

  • Describes the ordinate and tabular dimensioning systems
  • Discusses the difference between fixed zero and floating zero numerical control systems
  • Describes the relationship between numerical control (NC) and computer numerical control (CNC)

Demonstrate competency in the basics of computer-aided drafting.

Objectives:

  • Explains the advantages of using CAD in the drafting field
  • Discusses the functions of CAD hardware
  • Distinguishes the difference between a hand-drawn print and a CAD-developed print

The student will interpret metric dimensioned, and dual-dimensioned blueprints.

Objectives:

  • Evaluates the linear measuring system
  • Discusses reasons for using the metric measuring system
  • Describes the dual dimensioning system used on industrial prints
  • Explains product liability notations that may appear on prints