UTPA STEM/CBI Courses/Computer Numerical Controls/Intro to Computer Numerical Controls

Course Title: Fundamentals of Computer Numerical Controls

Lecture Topic: History and Introduction to NC & CNC

Instructor: Daniel A. Morales

Institution: South Texas College

Backwards Design

Course Objectives

• Primary Objectives- By the next class period students will be able to:
  • Differentiate the differences between Computer Numerically Controlled (CNC) equipment versus Numerically Controlled (NC) equipment.
  • Understand the history and development of Numerically Controlled and Computer Numerically Controlled machines.
  • Understand the different types of CNC machines and the accuracies that they operate under.

• Sub Objectives- The objectives will require that students be able to:
  • Understand the differences between Numerically Controlled and Computer Numerically Controlled machines.
  • Understand the differences between accuracy, repeatability, and reliability.

• Difficulties- Students may have difficulty:
  • Determining when it is appropriate to use CNC equipment versus conventional manual machines.
  • Determining where cost-savings is possible with CNC machines over conventional machines.

• Real-World Contexts- There are many ways that students can use this material in the real-world, such as:
  • NC and CNC machines and equipment is used in a variety of industries, from continuous production, to job lots, to rapid prototypes.
  • NC and CNC machines are used to manufacture goods that surround us every day. Without the use of these machines, many modern ammenities that we take for granted would not be possible.

Model of Knowledge

• Concept Map
  • CNC equipment is becoming central to manufactures as they integrate Six Sigma quality control methods, or 99.9997% defect free products. (3.4 defects per million opportunities). The most common type of CNC and NC machines in use today are of the "chip making" variety, which include turning and machining centers. Typically they are used in tool room applications. Other CNC and NC machines include drafting machines, hole-punching machines, flame cutters, and precision grinders.

• Content Priorities
  • Enduring Understanding
    • Machined parts can be created with greater accuracy, ease, and complexity.

• • Important to Do and Know
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  • Worth Being Familiar with
    • Advanced print reading abilities
    • Fundamental knowledge of machining mathematics
    • Understand the machine language (G & M code)

Assessment of Learning

• Formative Assessment
  • In Class (groups)
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  • Homework (individual)
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• Summative Assessment
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Legacy Cycle

OBJECTIVE

By the next class period, students will be able to:

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The objectives will require that students be able to:

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THE CHALLENGE

CNC and NC machines operate with a high degree of accuracy and allow for complex parts to be machined in difficult to machine materials. How are CNC and NC machines used to create air planes and aviation components?

GENERATE IDEAS

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MULTIPLE PERSPECTIVES

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RESEARCH & REVISE

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TEST YOUR METTLE

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GO PUBLIC

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Pre-Lesson Quiz

Various material can be tested here, depending on time constraints.

Test Your Mettle Quiz

Various material can be tested here, depending on time constraints.