9. What is the role of the designer? Prepare the plan for the transformation of concepts and ideas into concrete and tangible products using available resources
10. Design documentation Communication of ideas and concepts into colleagues and workers Assigning responsibilities between designers, machinist and workers who Implement the design
11. Types of Drawings • Artistic Drawings • Technical Drawings • Illustrations or Renderings
12. D esign - the plan and arrangement of the form and structure of natural and man-made material to achieve a desired function. E ngineering - the application of sciences to the construction of hardware or/and software. E ngineering design - an iterative decision making process in which sciences are applied to devise a system to meet the needs of the client.
13. Problem Identification summarize client's needs in the design specification Conceptual Design brainstorm to figure out potential solutions and record them in notes and sketches Preliminary Design analyze using experience, logic, math, sciences, and graphics test engineering models Detailed Design optimize the design solution Implementation and Documentation create fabrication specifications and working drawings
14. Problem Statement Although feeding device are available for people suffering from paralysis, they are often bulky, expensive, and not portable. A need exists for a simple feeding device. It should be electromechanical and operate from its own power source. The design should be economical, have a light weight, and be simple to use and maintain . Project Title Design of an Economical Potable Feeding Device for Patients of Paralysis Problem Identification summarize client's needs in the design specification
15. Problem Identification summarize client's needs in the design specification Conceptual Design brainstorm to figure out potential solutions and record them in notes and sketches Preliminary Design analyze using experience, logic, math, sciences, and graphics test engineering models Detailed Design optimize the design solution Implementation and Documentation create fabrication specifications and working drawings
16. Problem Identification summarize client's needs in the design specification Conceptual Design brainstorm to figure out potential solutions and record them in notes and sketches Preliminary Design analyze using experience, logic, math, sciences, and graphics test engineering models Detailed Design optimize the design solution Implementation and Documentation create fabrication specifications and working drawings
17. Problem Identification summarize client's needs in the design specification Conceptual Design brainstorm to figure out potential solutions and record them in notes and sketches Preliminary Design analyze using experience, logic, math, sciences, and graphics test engineering models Detailed Design optimize the design solution Implementation and Documentation create fabrication specifications and working drawings
18. Problem Identification summarize client's needs in the design specification Conceptual Design brainstorm to figure out potential solutions and record them in notes and sketches Preliminary Design analyze using experience, logic, math, sciences, and graphics test engineering models Detailed Design optimize the design solution Implementation and Documentation create fabrication specifications and working drawings
19. ~2000BC – a drawing carved on a tablet for a temple in Babylonian Empire ( from a collection of Louvre)
23. 3-D CAD systems were developed in the 1990s The Boeing 777 is the first jetliner to be 100 percent digitally designed using three-dimensional computer graphics. Throughout the design process, the airplane was "pre-assembled" on the computer, eliminating the need for a costly, full-scale mock-up. Dodge Neon was designed using 3-D CAD system CATIA
Why Engineering Drawings? • Engineering drawing is a formal and precise way of communicating information about the shape, size, features and precision of physical objects. • Drawing is the universal language of engineering.
Basic Information Included in a Drawing • Projected Views: Show as many sides as needed for completeness. • Cross Sections: A view that is good for showing interior features. • Table: Lower right corner, with material information, part name, designer etc. and finally • DIMENSIONS!!!: These are the most important and most complicated part of the drawing. There is more to it than just the numerical values!
The artistic cave paintings on the left above (top;French -- bottom; Chinese) communicate familiar surroundings and the excitement of the hunt. Most graphics from earlier periods used simple stick figures, but these became more elaborate over time. Early technical drawings, such as the one represented on the right above were used to communicate general shape information for the construction of a building or other item. At this stage, straight edged instruments were used to produce the drawings and proportions were more accurately portrayed.
Perspective drawings provide helpful visualization cues but it is difficult to supply precise size, shape, and detail information.
Monge used parallel projections to permit the accurate representation of 3-D objects on 2-D planes. These principles are used today to display a drawing on a 2-D CAD screen just as they were to show drawings on a 2-D piece of paper. Parallel projection places the observer at a theoretical distance of infinity. This insures that the line-of-sight are parallel and allows engineers to make drawings that are free of perspective.
Almost everything being produced today has a 2-D representation made for engineering design and production purposes. These drawings contain all of the information necessary to produce or construct something such as a building, road, engine block, or paper clip. The 2-D drawings are a distillation of some two hundred years of practice.
Almost everything being produced today has a 2-D representation made for engineering design and production purposes. These drawings contain all of the information necessary to produce or construct something such as a building, road, engine block, or paper clip. The 2-D drawings are a distillation of some two hundred years of practice.
Stress the importance of the database and the fact that it normally comes from the CAD model. Have students list as many stages of a products life as they can -- define a problem, suggest solutions, make models, test models, purchase materials, make production parts, maintain product, dispose of product, etc.
