ENGR 0151. Engineering Graphics
Units: 4
Formerly known as ENGR 22A and ENGR 22B
Prerequisite: Completion of MATH 27 with grade of "C" or better
Hours: 108 (54 lecture, 54 laboratory)
Covers the principles of engineering drawings in visually communicating engineering designs and an introduction to computer-aided design (CAD). Topics include the development of visualization skills; orthographic projections; mechanical dimensioning and tolerancing practices; and the engineering design process. Assignments develop sketching and 2-D and 3-D CAD skills. The use of CAD software is an integral part of the course. (C-ID ENGR 150) (CSU, UC)
ENGR 0151 - Engineering Graphics
http://catalog.sierracollege.edu/course-outlines/engr-0151/
Catalog Description DESCRIPTION IS HERE: Formerly known as ENGR 22A and ENGR 22B Prerequisite: Completion of MATH 27 with grade of "C" or better Hours: 108 (54 lecture, 54 laboratory) Description: Covers the principles of engineering drawings in visually communicating engineering designs and an introduction to computer-aided design (CAD). Topics include the development of visualization skills; orthographic projections; mechanical dimensioning and tolerancing practices; and the engineering design process. Assignments develop sketching and 2-D and 3-D CAD skills. The use of CAD software is an integral part of the course. (C-ID ENGR 150) (CSU, UC) Units 4 Lecture-Discussion 54 Laboratory 54 By Arrangement Contact Hours 108 Outside of Class Hours Course Student Learning Outcomes Interpret, analyze, and create orthographic drawings both by hand and with a computer. Interpret, analyze, and create drawings which include auxiliary and sectional views. Interpret, explain, and create drawings that include dimensions and tolerances that are produced to an industry standard. Example ANSI or ASME standard (American Society of Mechanical Engineering). Create various geometric constructions, using mathematical techniques, both by hand and with a computer. Read, analyze, and create graphical solutions to descriptive geometry problems. Create 3D digital solid models utilizing engineering software. Course Content Outline I. Introduction to 2D Computer Aided Design Software (CAD) A. CAD user interface / GUI B. Basic CAD command structure C. Use of coordinate systems in CAD D. Creating and modifying 2D geometry E. Creating and modifying 3D models F. Template files G. Engineering standards related to drawings (Line types, etc.) H. Plotting scaled hard-copy drawings I. Printing 3D models using various technologies II. Technical Sketching A. The use of and importance of freehand sketching B. Materials used in freehand sketching C. Sketching geometry i. Lines ii. Circles iii. Arcs iv. Ellipses v. planes vi. solid primitives D. Estimating proportions E. Steps in making freehand sketches i. single view ii. multiview iii. pictorial III. Geometric constructions A. Basic geometry definition i. 1D geometric definitions a. Points b. Lines ii. 2D geometric definitions a. Planes b. Angles (multi-line and planes) c. Circles and Arcs d. Curves e. Intersections f. Tangencies iii. 3D geometric definitions a. Polyhedra b. Prisms c. Pyramids d. Cylinders e. Cones f. Spheres g. Ellipsoids B. Constructing, combining, and modifying geometric objects i. 1D geometry a. Points b. Lines ii. 2D geometry a. Planes b. Angles (multi-line and planes) c. Circles and Arcs d. Curves e. Intersections f. Tangencies iii. 3D geometry a. Polyhedra b. Prisms c. Pyramids d. Cylinders e. Cones f. Spheres g. Ellipsoids IV. Orthographic Projection – Hand Sketching A. Angles of projection B. Single and multiple views C. Techniques in the use of hidden and center lines D. Object visualization and representation i. Normal lines and surfaces ii. Inclined lines and surfaces iii. Oblique lines and surfaces V. Orthographic Projection – CAD A. Prototype construction and editing B. Drawing attributes i. Limits ii. Units iii. Layers iv. Linetypes C. Projection methods i. Layout of multiview drawings ii. Alternate position of views iii. 3D models iv. Sectional views v. Auxiliary Views vi. True size views (descriptive geometry) vii. Partial views viii. Revolution conventions D. Model elements (2D and 3D) i. Holes ii.Fillets and rounds iii. Chamfers iv. Tangencies VI. Orthographic Projection Dimensioning – Hand Sketching A. Placement of dimensions on views i. Dimensioning for functionality ii. Contour rule iii. Hole location and size B. Conventions & Standards ANSI (American National Standards Institute)/ASME (American Society of Mechanical Engineers) Y18.5 2018 i. Lines conventions ii. Dimension text iii. Center marks iv. Dimension spacing v. Arrowheads vi. Text size relative to drawing size vii. Direction of dimension figures viii. Dimensioning symbols VII. Orthographic Projection Dimensioning – CAD (2D & 3D models) A. Conventions & Standards ANSI/ASME Y18.5 2018 B. Creating dimension styles i. Defining dimension variables 1. Extension line offset 2. Extension line suppression 3. Dimension baseline spacing 4. Arrowhead type and size 5. Center line spacing 6. Text style and height 7. Direction of dimension figures 8. Scaling of dimension variables relative to drawing scale 9. Precision of dimensional values C. Application of tolerancing i. Types of tolerance dimensions ii. Fits between mating parts iii. Tolerance specifications iv. ANSI/ASME/SAE (Society of Automotive Engineers) limits and fits v. Form tolerancing vi. Positional tolerancing vii. Surface finish VIII. Sectional Views A. Cutting plane and resulting section B. Lines in sectioning i. Cutting Plane ii. Visible iii. Hidden iv. Center v. Break C. Section lining i. Application technique ii. Material symbols D. Visualizing sectional views E. Types of sectional views i. Full ii. Half iii. Revolved iv. Removed v. Broken-out vi. Offset vii. Aligned sections F. Partial views G. Representation of ribs, spokes. webs in sectional views H. Conventional breaks IX. Auxiliary Views A. Lines and planes B. Folding lines C. Reference planes D. Classification of auxiliary views X. Descriptive Geometry A. Definition of points, Lines, planes, primitive solids B. Graphical representation of points, Lines, planes, primitive solids C. Graphical solutions of spatial problems D. Graphical projections E. Folding line definition and use F. Principal and oblique lines G. Principal, inclined and oblique planes H. Analyzing geometry for true size I. Dihedral angles D. Representation & analysis of intersecting geometry XI. 3D modeling A. Types of solid modeling i. Feature based ii. Parametric B. Benefits, 3D vs. 2D modeling i. understanding / interpretation ii. Design intent and fit verification iii. Rapid prototyping (3D printing) iv. Mathematical modeling (stress, heat flux, fluid flow) C. Software interface / GUI i. Command/tool definition, use and location ii. Layout (toolbars, ribbon, displays) iii. Options for setup by user iv. Property manager and feature manager v. System requirements and software install D. Construct, combine and modify 3D geometry(Sect.III.B.iii) E. Evaluate model attributes (weight, volume, CG, etc.) F. Plot assembly and exploded views (sheets) G. Print 3D models XII. Threads and Fasteners A. ANSI/Metric Thread Standards (Y18.5 2018) B. Screw thread terms i. Screw thread ii. External thread iii. Internal thread iv. Major diameter v. Minor diameter vi. Pitch vii. Pitch diameter viii. Lead ix. Angle of thread x. Crest xi. Root xii. Axis of screw xiii. Depth of thread xiv. Thread Form xv. Series of thread C. Screw Thread Forms i. 60 Degree Sharp – V ii. American National and Unified 1. Coarse 2. Fine 3. Extra Fine 4. Constant pitch iii. Metric iv. Pipe v. Square vi. Acme vii. Standard worm viii. Knuckle ix. Buttress D. Thread Pitch E. Right/Left handed threads F. Single and multiple threads G. Thread and fastener representational drawing symbols i. Schematic ii. Simplified iii. Detailed H. Threads in section I. American National, Unified and Metric thread series J. American National, Unified and Metric thread fits K. Thread notes L. Bolts, studs & screws i. Specifications for bolts and nuts ii. Standard cap screws iii. Standard machine screws iv. Standard set screws v. Keys vi. Springs XIII. Pictorial Drawings A. Axonometric Projection i. Isometric projection 1. Isometric axes 2. Isometric lines 3. Nonisometric lines 4. angle measurement in isometric drawings 5. Curves and circles in isometric drawings 6. Intersections in isometric drawings 7. Isometric section drawings 8. Dimensioning isometric drawings ii. Dimetric projection iii. Trimetric projection B. Oblique Projection i. Angles of projection ii. Scale of receding axis iii. Object positioning in oblique drawings iv. angle measurement in oblique drawings v. Curves and circles in oblique drawings vi. Oblique section drawings vii. Dimensioning oblique drawings C. Perspective Projection Course Objectives Course Objectives Lecture Objectives: Technical Sketching 1. Explain the use of and importance of freehand sketching in technical drawing 2. Describe the materials used in freehand sketching 3. Create freehand sketches using correct sketching techniques 4. Demonstrate the application of proportion in freehand sketching 5. Demonstrate the process of developing single view, multiview, and pictorial freehand sketches Geometric Constructions 1. Name and describe the characteristics of geometric entities 2. Demonstrate the methods used in applying geometric constructions to Create/combine/modify 1D, 2D, & 3D geometry Pictorial Drawings 1. Define the advantages and disadvantages of using multi-view, axonometric, oblique, or perspective drawings to represent objects 2. Construct a drawing utilizing isometric techniques (hand & CAD) 3. Construct a drawing utilizing orthographic techniques (hand & CAD) 4. Construct an iso and ortho drawings using angular and linear measurement conversion 5. Create dimensioned isometric and orthographic drawings (CAD) 6. Create drawings containing a sectional view (hand & CAD) 7. Create drawings containing an auxiliary view (hand & CAD) 8. Describe the characteristics of oblique drawings 9. Describe the effect of choice of receding axis angle in oblique drawings 10. Describe the effect of scaling receding axis in controlling distortion 11. Construct a drawing containing oblique circles and curves 12. Construct a drawing containing an oblique sectional view 13. Describe the difference between the three types of perspective drawings 14. Create and analyze drawings for true-size geometry 15. Analyze the graphical representation of descriptive geometry 16. Create and analyze 3D models 17. Print scaled 2D sheets and 3D models to ANSI standards Y18.5 2018 Laboratory Objectives: Introduction to 2D & 3D Computer Aided Design (CAD) Software 1. Describe the layout of the CAD GUI / user interface 2. Describe the use of the command structure of CAD software 3. Demonstrate the use of coordinate systems with CAD software for creating geometry in 2D and 3D 4. Demonstrate use of the commands and methods used in the creation and modification of geometry in 2D and 3D 5. Demonstrate construction and use of drawing template files 6. Describe the proper application of engineering line types (ANSI Y18.5, 2018) 7. Create a production of scaled sheet drawings 8. Create a 3D print (rapid prototype) Technical Sketching 1. Describe the materials used in freehand sketching 2. Create freehand sketches using correct sketching techniques 3. Demonstrate the application of proportion in freehand sketching 4. Demonstrate the process of developing single view, multiview, and pictorial freehand sketches Geometric Constructions 1. Describe the characteristics of geometric entities 2. Demonstrate the methods used in applying geometric constructions (CAD and free-hand drawings) Orthographic Projection – Hand drawing 1. Explain the differences between first angle projection and third angle projection 2. Demonstrate the proper choice of views and their arrangement 3. Demonstrate the proper use of hidden and center lines 4. Demonstrate the process of visualizing and representing normal, inclined, and oblique lines and surfaces 5. Create a technical drawing including sectional views 6. Create a technical drawing including auxiliary views 7. Use the techniques of geometric constructions to solve for the true size of lines and planes 8. Use the techniques of geometric constructions to represent lines, planes and solids according to engineering standards Orthographic Projection – CAD 1. Demonstrate the construction, editing, and use of prototype drawing files 2. Demonstrate the methods of setup of proper drawing attributes 3. Demonstrate the construction of multiview drawings using standard conventions, placement, and alignment 4. Demonstrate the representation of machine elements in drawings 5. Create a 3D model which includes all standard orthographic views 6. Create a 3D model which includes sectional and auxiliary views Orthographic Projection Dimensioning – Sketching 1. Demonstrate the application of basic dimensioning concepts to orthographic sketches 2. Demonstrate the correct application of inch and metric units on sketches 3. Demonstrate the application of the conventions and standards of ANSI Y18.5 2018 to orthographic sketches VII. Orthographic Projection Dimensioning – CAD 1. Demonstrate the application of the conventions and standards of ANSI Y18.5 2018 on orthographic CAD drawings 2. Define and apply CAD dimension variables as used in orthographic CAD drawings 3. Demonstrate the application of tolerancing per the standards of ANSI Y18.5 2018 on orthographic CAD drawings Sectional Views 1. Demonstrate the process of cutting plane placement to expose interior features 2. Apply the standards and conventions for lines used in section drawings 3. Identify the common material symbols used in section lining 4. Create a section drawing given two/three external orthographic views 5. Identify the seven types of sections used in drawing development 6. Demonstrate the techniques for representation of ribs, webs, and spokes in sectional views 7. Demonstrate the appropriate use of partial views in drawing development 8. Apply the conventions for application of conventional breaks to drawings Auxiliary Views 1. Identify principal, inclined, and oblique planes and lines in orthographic drawings 2. Demonstrate the use of folding lines in the construction of auxiliary views 3. Demonstrate the use of folding lines in the construction of auxiliary views 4. Differentiate between the three types of auxiliary views 5. Create a drawing showing the true measure of a dihedral angle 6. Construct a drawing utilizing a partial auxiliary view 7. Construct a drawing utilizing an auxiliary sectional view 8. Construct a drawing utilizing a secondary auxiliary view Threads and Fasteners 1. Apply the ANSI/Metric Standards for application specific conventions 2. Define screw thread terms 3. Differentiate between screw thread forms 4. Describe the difference between right/left hand threads 5. Apply thread pitch and lead to a thread drawing 6. Describe the difference between single and multiple threads 7. Construct drawings that employ thread and fastener standard symbology 8. Construct appropriate representations for threads in section views 9. Differentiate between the American National, Unified and Metric thread series 10. Differentiate between the American National, Unified, and Metric thread fits 11. Construct thread notes on drawings for part description 12. Construct representations of threads and fasteners in drawings 13. Construct representations of keys in drawings 14. Construct representations of springs in drawings Pictorial Drawings 1. Define the advantages and disadvantages of using axonometric, oblique, or perspective drawings to represent objects 2. Construct a drawing utilizing isometric and nonisometric lines 3. Construct an isometric drawing using angular to linear measurement conversion 4. Construct a drawing containing isometric circles and curves 5. Construct a drawing containing an isometric sectional view 6. Construct a dimensioned isometric drawing 7. Describe the characteristics of oblique drawings 8. Describe the effect of choice of receding axis angle in oblique drawings 9. Describe the effect of scaling receding axis in controlling distortion 10. Construct a drawing containing oblique circles and curves 11. Construct a drawing containing an oblique sectional view 12. Construct a dimensioned oblique drawing 13. Describe the difference between the three types of perspective drawings Methods of Evaluation Problem Solving Examinations Skill Demonstrations Reading Assignments Required college level readings from chapters in the textbooks assigned weekly. Students are expected to participate in the lecture/discussions based upon these readings. Example 1: Construct a drawing, based upon Chapter 3: Geometric Constructions, demonstrating the weekly-learning objectives. These weekly drawings are either freehand sketches or computer aided design (CAD) generated. The drawings are evaluated for compliance to American National Standards Institute (ANSI)standard. Critical thinking and problem solving are part of these assignments. Example 2: Search the Internet for articles on the development of current ANSI standards. Writing, Problem Solving or Performance College level problem solving and/or writing assignments are regularly utilized. Problem solving and skill demonstrations are crucial to any successful basic engineering drawing course. Example 1: Calculate appropriate tolerances and allowances from ANSI tables for mating parts in an assembly. Example 2: Solve the problem of the construction of orthographic sketches from a pictorial drawing. Other (Term projects, research papers, portfolios, etc.) Create a final project which is a complete set of engineering plans that one can use to build a mechanical assembly. This will include a nice binding, table of contents, assembled view, an exploded view, orthographic drawings of all individual parts, and a parts list. Methods of Instruction Laboratory Lecture/Discussion Distance Learning Other materials and-or supplies required of students that contribute to the cost of the course. Sketch paper 1 - Flash Drive
Course Identification Numbering System (C-ID)
...ENGR 110 ENGR 0110 ENGR 130 ENGR 0130 ENGR 150 ENGR 0151 ENGR 180 ENGR...
