Design Process and Visualization Lecture 2 Autumn Quarter

Topics For Today Questions on Drawings 1 and 2 ? Purdue Visualization Assessment Online through WebCT (22 minutes) http://class.osu.edu > H191 > Purdue Visualization Introduction To Engineering Design Process Design Visualization & More Freehand Sketching Work on Drawings 3 and 4 Permanent Seat Assignment Today Instructor: Make it a practice to ask for questions from the day or days before. We use the Purdue Visualization test to measure the gains in visualizing objects. It is on line. We introduce the design process here to get the students thinking about design and to show them how they need to know their engineering graphics so that they can do the documentation for their designs. To that end, there will be additional instruction today on visualization and sketching. Autumn Quarter

Engineering Design Process - Chap 14 IDEATION REFINEMENT IMPLEMENTATION Instructor: In the simplest form, there are three steps to go from idea to finished product. Autumn Quarter

What Is Design? PROCESS OF CONCEIVING OR INVENTING IDEAS COMMUNICATING THOSE IDEAS TO OTHERS PRIMARY PURPOSES: PERSONAL EXPRESSION PRODUCT OR PROCESS DEVELOPMENT Instructor: Design is the essence of engineering. Scientists discover facts and engineers use the information to make useful things to improve society. Autumn Quarter

The Art Of Design CREATIVITY AND EXPRESSION DESIGNING FOR LOOK AND FEEL DESIGN FOR FUNCTION AND PURPOSE Instructor: Certainly in engineering, design allows for creativity and expression. But most engineers don’t focus on the look and feel they focus on function and purpose and the analysis that it takes to make a working device or system. It is the industrial designers that design for look and feel and typically the industrial team has both engineers and designers. Autumn Quarter

The Practice Of Engineering Design FOR ENGINEERS IT IS DESIGN WITH ANALYSIS DESIGNING TO SOLVE A PROBLEM PRODUCT DESIGN SYSTEM OR PROCESS DESIGN Autumn Quarter

The Ideation Process PROBLEM IDENTIFICATION Problem Statement Research Data Gathering Objectives Limitations Scheduling Instructor: This next set of slides breaks down the design process into more steps or details. Autumn Quarter

The Ideation Process PRELIMINARY IDEAS Notes Sketches/Models Brainstorm Synthesis PRELIMINARY DESIGN Evaluation Selection Autumn Quarter

The Refinement Process MODELING Geometric Simulation Animation Charts, Graphs, Diagrams DESIGN ANALYSIS Properties Mechanism Functional Human Factors DESIGN VISUALIZATION Autumn Quarter

The Implementation Process PLANNING PRODUCTION MARKETING FINANCE MANAGEMENT SERVICE DOCUMENTATION Autumn Quarter

Design Visualization Eye - Hand coordination is important when sketching Eye - Mind - Hand connection is crucial to "ideation" sketching First step is make a sketch to understand the 3-D object or its design Next step is to evolve the design Reference: BTG Chapter 3 Autumn Quarter

Solid Object Features Features or Attributes of an object: Edges Faces Limiting Element(s) Vertices Shape (of faces) Instructor: Have the students point out the features of attributes of this object. Autumn Quarter

General Visualization Techniques Solid Object Combinations Additive Subtractive Planar Surfaces Cutting Plane - normal, inclined, oblique Symmetry Instructor: Chapter 5 in BTG talks about features and visualization. Autumn Quarter

Visualization Techniques For Engineering Drawings Image plane Like 2D picture Object-Image Orientation Gives rise to Primary Axes and thinking about the third dimension Multiple Image Planes Produces our Multiview Drawings Autumn Quarter

Missing Line Problem – Example 1 One or more lines are missing. Add lines to make views complete. Instructor: When students are looking at objects, they need to be thinking about surfaces and cylindrical shapes and what these attributes would have in a multiview or orthographic drawing. A piece of paper can be thought of as a face and it can appear true size, foreshortened, or as an edge or line. In the case of missing lines in orthographic views, we have to see surfaces in one view and edges of a plane in other views. Note that in this case we see the front surface as a shape but we see it as a line in the top and right side views. Anywhere two surfaces meet they form an edge or a line and we can see that line in adjacent views. Autumn Quarter

Example 1 Solution Missing Line Problem Autumn Quarter

Missing Line Problem – Example 2 One or more lines are missing. Add lines to make views complete. Limiting element Instructor: Here we have a half of a cylinder. In this case we show a line in the right side view at the top that is the limiting element for the curved surface. Autumn Quarter

Example 2 Solution Missing Line Problem Instructor: Point out the hidden lines and center lines and how they are portrayed in these views. Autumn Quarter

Hint: Verify by sketching the isometric view In Class Exercise Given the Top and Front views shown here, how many right side views can you draw? Discuss at your table Instructor: Have the students work for three to five minutes and then pick a table to see how many views they have created. See if another table has more (there are an almost infinite number of views) Hint: Verify by sketching the isometric view Autumn Quarter

Possible Solutions There are many more A B C Instructor: The three solutions will come in when the mouse is clicked… then the text comes in on the next click. Ask if the students think there are more solutions each time Autumn Quarter

Assignments Dwg 3 – ML-2 – Add missing line(s). Sketch pictorials as needed to solve problems. Due at end of today’s lecture Dwg 4 – A6 – Draw the missing line in each orthographic set in PENCIL (using red to draw the missing lines is optional) Due at beginning of next lecture Autumn Quarter