cad design process VS conventional design process

THIS WILL GIVES YOU INFORMATION OF DESIGN PROCESS INVOLVED IN CAD AND CONVENTIONAL METHODS

1. CAD/CAM TOPIC: CONVENTIONAL AND CAD DESIGN PROCESS By J KUMAR CHANDRA, ASST. PROF., DEPARTMENT OF ME, NNRG-HYDERABAD

2. DESIGN PROCESS(CONVENTIONAL) Before examining the several facets of computer-aided design, let us first consider the general design process. which consists of six identifiable steps or phases:- 1. Recognition of need 2. Definition of problem 3. Synthesis 4. Analysis and optimization 5. Evaluation 6. Presentation

3. DESIGN PROCESS(CONVENTIONAL) Recognition of need Someone recognizes the need that can be satisfied by a new design Problem definition Specification of the item 3. Synthesis creation and conceptualization

4. DESIGN PROCESS(CONVENTIONAL) Analysis and optimization the concept is analyzed and redesigned Evaluation compare design against original specification or checking errors. Presentation documenting the design (e.g. drawing)

5. FLOW CHART OF DESIGN PROCESS

6. DESIGN PROCESS(NON-CONVENTIONAL) in CAD design process, the process can be completed with in only 4 steps 1. Geometric modeling 2. Engineering analysis 3. Design review and evaluation 4. Automated drafting

7. Geometric modeling In computer-aided design, geometric modeling is concerned with the computer-compatible mathematical description of the geometry of an object. The mathematical description allows the image of the object to be displayed and manipulated on a graphics terminal through signals from the CPU of the CAD system

8. Engineering analysis In the formulation of nearly any engineering design project, some type of analysis is required. The analysis may involve stress-strain calculations, heat-transfer computations, or the use of differential equations to describe the dynamic behavior of the system being designed. Provides properties of a solid object being analyzed, such as the surface area, weight, volume

9. Design review and evaluation Checking the accuracy of the design can be accomplished conveniently on the graphics terminal. Semiautomatic dimensioning and tolerance routines which assign size specifications to surfaces indicated by the user help to reduce the possibility of dimensioning errors

10. Automated drafting Automated drafting involves the creation of hard-copy engineering drawings directly from the CAD data base

11. CONVENTIONAL DESIGN PROCESS Vs CAD DESIGN PROCESS

12. BENEFITS OF CAD DESIGN PROCESS OVER CONVENTIONAL DESIGN PROCESS 1. Improved engineering productivity 2. Shorter lead times 3. Better designs provided 4. Customer modifications are easier to make 5. Faster response to requests for quotations 6. Avoidance of subcontracting to meet schedules 7. Minimized transcription errors 8. Improved accuracy of design 9. In analysis, easier recognition of component interactions 10. Provides better functional analysis to reduce prototype testing 11. Assistance in preparation of documentation