- Engineering drawing is a language used to relate and communicate ideas between professionals and non-professionals if need be.
- Learning the language of technical graphics allows you to visualize problems more clearly and use graphic images to find solutions with more ease.
- Importance of Engineering drawing: Visualization, Communication, & Documentation
- 92% of the design process is graphically based.
- Design: process of conceiving or inventing ideas & communicating those ideas to others.
- It requires input from such areas as customer needs, materials, capital, energy, time requirements, & human knowledge/skills
- Engineers must fulfill two important aspects of design: Aesthetics and Function
Engineering Design ProcessTraditional Engineering Design:
- It is a linear approach divided into a number of steps. It moves through each step in a sequential manner; if problem comes up, the process may return to previous step (called iteration or looping)
- Engineering Design ProcessConcurrent Engineering Design:
- It is a nonlinear team approach to design that brings together the input, processes, & output elements necessary to produce a product.
- The people & processes are brought together at the beginning (not typical in linear)
- Team made up of: design & production engineers, technicians, marketing & finance personnel, planners, & managers.
- Three activities that make up the concurrent design process are: Ideation, Refinement, & Implementation.
Graphics CommunicationWhat you Will Learn:
Visualization: the ability to mentally control visual information Graphics Theory: geometry and projection techniques Standards: sets of rules that govern how parts are made and technical drawings are represented Conventions: commonly accepted practices and methods used for technical drawings Tools: devices used to create engineering drawings and models, including both hand-held and computer tools Applications: the various uses for technical graphics in engineering design, such as mechanical, electrical, and architectural
Graphics CommunicationTerminology: CAD: Computer Aided Design CADD: Computer Aided Design & Drafting CAM: Computer Aided Manufacturing CIM: Computer Integrated ManufacturingCAE: Computer Assisted Engineering CAPP: Computer-Aided Process Planning MRP: Material Requirement Planning EDM: Enterprise Document/Data Management CAE: Computer Assisted Engineering Blue Print Reading: Interpreting drawings made by others
Engineering DrawingsConventions:
- Conventions are commonly accepted practices, rules, or methods (i.e.. hidden lines, dimension lines…
- Most important convention is Alphabet of Lines established by ASME called linestyles
- Line patterns communicate what the line represents in the drawing
- Line patterns tell you information such as whether the line is hidden, visible, or a centerline
- Views should be selected to minimized the use of hidden lines Precedence of lines: Visible à Hidden à Center
