Advanced CAD/CAM - CTE Online Model

by CTE Online Admin

This program prepares students for an entry level position in CAD. Computer Aided Drafting replaces conventional drafting equipment with modern computer technology, reducing repetition and increasing production. Students in this class will spend the first semester involved in systematic exercises to develop understanding of CAD concepts and processes. The second semester will be spent completing advanced work to increase skills. The class is recommended for juniors and seniors who have successfully completed one year of Basic Drafting and are interested in pursuing a drafting career.

About the Team: This structure of this course and the materials contained within it were created by a team of educators from across the state with support from the CTE Online curriculum leadership team and detailed coordination provided by the Course Specialist Dan Frank.

From CALPADS: Advanced Engineering Design (Capstone)

This capstone course further builds upon the Engineering and Architecture introduction course, and Engineering Design pathway concentrator course/s, in this sector. The capstone is the final course taken in the complete sequence of courses. This career technical education capstone course provides content, skill development and leadership training which prepare students for the world of work and to pursue further education such as industry certifications and a postsecondary degree.

Program Information
Course Certification Elements
Standards
California English Common Core Standards (7)
California Math Common Core Standards (8)
California's 2008 CTE Standards (85)
California Academic Content Standards (7)
Learning Outcomes and Competencies

Upon successful completion of this course, the student should be able to:

Apply a variety of research methods to find critical information as a part of the Engineering Design Process

Identify and assess previous designs to improve your design solution

Demonstrate the correct use of precision measurement tools with an emphasis on repeatability, precision and accuracy

Design and build an original product

Accurately use drafting, parametric modeling and toolpath generations skills to produce a quality product.

Demonstrate job specific technical skills including the reading, writing and interpreting G code and M code

Accurately perform basic precision machining and CNC operations tasks

Materials

Texts:

Machinery's Handbook 29th Edition

An Introduction to Mechanical Engineering-Jonathan Wickert

AWS D1.1 (Structural Welding Code)

ASME Y14.5

Computer Software:
Local Industry Standard Parametric Modeling Software, i.e. SolidWorks, Autodesk Inventor Professional, SolidEdge, etc...

ESLR
  1. Demonstrate appropriate work ethic through:
    • Punctual, regular attendance
    • Personal integrity, honesty, respect
    • Teamwork, working cooperatively with others
    • Positive attitude, enthusiasm, initiative
  2. Demonstrate appropriate job preparation and search skills through:
    • Assessment, career planning, goal setting
    • Resume, employment application, interview
    • Attainment of course specific competencies
  3. Demonstrate entry level use of industry sector technology/tools through:
    • Adherence to safety procedures, precautions
    • Application of knowledge, skills
    • Integrated use of academic skills and computer literacy skills
    • Workplace Simulation/Community Classroom/Cooperative Vocational Education
  4. Demonstrate effective communication through:
    • Workplace appropriate verbal, written and listening skills
    • Performance of verbal and written directions
    • Organization of thoughts and use of articulate language
  5. Demonstrate critical thinking skills through:
    • Analysis/evaluation and solution of problems
    • Practical/successful use of community resources/agencies
    • Independent work, self management
  6. Demonstrate professionalism through:
    • Socially appropriate interaction
    • Suitable dress and appearance
    • Confidentiality
Instructional Information

Methods, Strategies and Techniques

A variety of strategies and techniques are used to instruct the students, including: cooperative learning, current textbooks, technology and reference materials, demonstrations, field trips, group instruction, and guest speakers.

Assessment of Student Performance

Assessment of student performance will include: classroom participation, completion of required plates and assignments, a complete portfolio, individual and group projects, industry related tests, and work habits (attendance, punctuality, professional attitude, and being a member of a team).

ROP Certificate Requirements

To earn a Certificate of Proficiency for this course, students must accomplish the following: completion of competencies at a minimum performance of 70%, maintain an 85% or higher attendance rate, and demonstrate positive work ethics in class.

Units

Unit 1: Core-Cards the Fractional Playing Cards

In this unit, students will develop Core-Cards using creativity while reinforcing essential math skills. This is a project that can be done in any class, that teaches creativity. Perfect for product design or wherever original thinking is required. This unit can be done at the start of the class or it can be done in between projects or it can be for 10 minutes every day to reinforce math skills required to be successful in any shop.

approximately
1 - 2 weeks

Unit 2: Household Appliance Design Analysis

In this unit, students will be asked to identify a current household product, identify its critical attributes, and fully document/design an improved model.

Approximately
4 weeks

Unit 3: Bridges as Dynamic Structures

This unit introduces the student to the designing of any structure that involves planning and adhering to models and standards. The bridge design process covers most design principles and allows students to test their structures under many conditions. Also explored are the workers, designers and planners of structural design. Students will test their designs and apply testing for load and stress to designs by: Accurately follow instructions for creating template for practice purposes and successfully follow steps for design and testing of original bridge design. Also introduced are factors to determine engineering properties of Yield stress and elasticity mass density. During cross section analysis students will determine the area and the moment of inertia and will graph the strength vs. length for tension and compression.

Direct Instruction
4 Hours
Computer Design Time
8 Hours
Group Designs Presentations
4 Hours

Unit 4: Golden Ratio Calipers

In this unit students will design and build a set of Fibonacci calipers. Students will also learn the mathmatic principles behind them and see their use in nature and design. The teacher will have to have MasterCam loaded on the classroom computers.

Approximately
2 weeks

Unit 5: My First CNC Project

In this unit, students will create a simple CNC engraving. Students will be creating this by hand, without the aid of modeling or CAM software. In this assignment student will need to create a design of 30 straight lines only. (this is to simplify the G and M coding to eliminate the need to teach arcs in this assignment) Once the design is complete, students will be learning how to write G & M code that your CNC mill/router can read. Finally, the students will machine their design on a CNC mill/router using their hand written G & M code.

Lesson Times
7 Days
Machine Time Depending on Equipment
2 - 3 weeks

Unit 6: CNC Cutting Board Design and Build

In this unit students will design, build and document a cutting board made by CNC machining. The project starts with traditional wood tools to get the wood stock prepared for the CNC router. After stock is glued up and planed, the cutting board is designed and toolpathed in a CAM software such as MasterCam. Then the project is run on the CNC router and finished. The unit outcome is a completed wood cutting board that matches the student's plan perfectly. Career application in cabinetry or wood manufacturing with CNC equipment.

Approximately
3 - 4 weeks

Unit 7: Desk Clock Design and Build

In this three-part unit students will be creating a small desk top clock. Students will be exposed to CAM software like that of MasterCAM. The student will learn to work with 2D design, 3D solid model parts, as well as learn to create their own designs. The project is broken into three basic parts including the clock front where students will work with a 2D design to learn how to program drilling, pocketing and contouring operations. In addition student will learn hand tapping and; the clock back where students will work with a 3D design. Design for manufacturing will be addressed. Students will have to make design modification to the 3D model. Students will also have to make edits to the G & M code and; the clock face where students will create or import a design into the CAM software, program for engraving and machine their custom design on the face of their Clock front.

Approximately- Programing
1 weeks
Machining (optional)
1 - 2 weeks

Unit 8: Machining 3D Surfaces

In this unit students will learn how to program a cam software to machine three-dimensional surfaces. Three topics will be covered: First. how to create a 3-D surface using a cam software (MasterCAM); Second, how to create rough surfacing and Third how to complete a finish surface my machining.

CAM Software Surface creations
3 - 5 Class Periods
Rough and Finish surfacing
1 - 3 Class Period
Machining-Variable
10 Hours

Unit 9: Design Analysis Using Weldments

In this unit, students will focus on the introduction to the rigid body dynamics using 3D software simulation. Basic concepts and rules of performing rigid body kinematics and dynamic analysis will be studied. Concepts of mechanism behavior are addressed. Motion studies can determine important design parameters like Velocities, Accelerations and Forces. Students will be able to see the combined power of 3D modeling and mechanism analysis in the design process.

Approximately
4 weeks

Unit 10: Roll Cage Design and Construction

In this unit students will study safety cages used in racing applications. Roll Cage design and analysis will be presented. Preparing a vehicle for installation will include activities in heat sink welding as well as the use of rosette welding for structural strengthening.

Direct Instruction and Activities
4 weeks

Unit 11: Uses of Geometric Dimensioning and Tolerancing (GD&T) in Project Based Learning

In this unit, the concepts of GD&T will be simply explained for the students by incorporating physical models of GD&T concepts (by either/or students and teacher) and student-created, introductory-level drawings. Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances. It uses a symbolic language on engineering drawings and computer-generated three-dimensional solid models that explicitly describes nominal geometry and its allowable variation. It tells the manufacturing staff and machines what degree of accuracy and precision is needed on each controlled feature of the part. GD&T is used to define the nominal (theoretically perfect) geometry of parts and assemblies, to define the allowable variation in form and possible size of individual features, and to define the allowable variation between features.

Most teachers implementing GD&T are working with a small, select number of students, not the entire class. These lessons will give teachers wishing to implement INTRODUCTORY GD&T (while also maintaining a typical technical drafting class) some tools and lessons to get started. The exercises utilize a couple of common parts. This will allow students to move quickly through the basics without having to create a new CAD part for every exercise. The samples are in AutoCAD, but any CAD software with GD&T functionality (Solidworks, Inventor, etc) will work fine.

Knowledge of GD&T will give the students a big edge finding work in the engineering and manufacturing fields as well as make them better designers and more efficient manufacturers of parts. Practice SkillsUSA Technical Drafting and Technical Design problems are provided that incorporate GD&T fundamentals and lead students into further study of GD&T. These problems are great class projects that provide a chance to implement "performance-based assessment" of GD&T fundamentals.

Direct Instruction and Activities
35 Hours