Chapter 7 The Application of Computer in Design and Manufacture of Mold and Die（计算机在模具设计与制造中的应用）.ppt

Chapter 7 The Application of Computer in Design and Manufacture of Mold and Die（计算机在模具设计与制造中的应用） Lesson 24 Computers and CAD/CAM Lesson 24 Computers and CAD/CAM Computers first appeared in the 1940x.The early inventions were bulky,cumbersome to use and performed computations rather slowly in comparison to modern digital computers.They advanced from mechanical relays to vacuum tubes to transistors to silicon chips.Computers today are more compact,faster and less expensive than their predecessors.Today some microcomputers can handle the computations of early day main-frames.Technological advances in this field have been truly dramatic. Lesson 24 Computers and CAD/CAM The application areas of computers have also grown rapidly.Computers are widely used in the fields of engineering,business,education and medicine.However,the most spectacular growth has been in the area of CAD/CAM-Computer Aided Design and Computer Aided Manufacture.This new technology,which emerged within the last decade or so,has helped to increase engineering productivity tremendously.Higher productivity is probably the primary consideration that influences most potential users to acquire a CAD/CAM system.CAD/CAM provides the integration of design,analysis and Lesson 24 Computers and CAD/CAM manufacturing functions into a system which is available to the user at his fingertips.In addition,other routine and monotonous(but important)tasks such as the preparation of bills of materials,costing,production scheduling,etc.may be performed automatically using the same computer network.Another major benefit in the use of CAD/CAM is reduced lead time from concept to design to manufacture.Product development cost can also be reduced dramatically because analysis such as the finite element method can be interfaced with design to arrive at the optimum design within a very short time. Lesson 24 Computers and CAD/CAM CAD/CAM and Analysis are best used in an interactive,computer graphics environment to provide solutio