计算机在模具设计中的应用外文翻译(编辑修改稿)

计算机在模具设计中的应用外文翻译(编辑修改稿)内容摘要：

niputers”had dll of the characteristics of full scale puters,but they were smaller and considerably less smaller puters called microputers followed soon after. The 1970’s saw continued advances in CAD hardware and software much that by the beginning of the advance in CAD system had bee a growth ,CAD has been transformed form its status of impractical novelty to its new status s one of the most important inventions to 1980,numerous CAD systems were available ranging in size form microputer systems to large miniputer and mainframe system. Computerintegrated manufacturing (CIM) represents integration of electronic data processing (EDP) into all departments associated with planning and production of an object (in this case,a mold):the linking of puteraided design (CAD),Computeraided production (CAP),conputeraided manufacturing (CAM),puteraided qualityassurance (CAQ)， production planning and schedulng (PPS)(see Fig 1) in terms of information means uninterrupted exchange of all information pertinent to a munications link is provided by the integrated EDP importantance ithin the CIM structure is assigned to of the theoretical priuct developed in CAD into the practical reality o mold occurs via CAM. Linking of PPS to implement CIM of Comoutes for Machining of an Injection Mold The objective of CAM is to produce,f possible,sections of a mold without intermediate steps (..,elimination of copy patterns),.,by initidting machining operations from the puter workstation. Prerequisites for CAM in the sense of CIM include CAD,the munications interface,and appropriate software and hardware for converting product information in the required production operations (see sequence diagram,Fig2). Mold Producting Sequence for Part Construction CAD means puteraided design on a designer,initially the part designer,draw a product with the aid of the puter part,primarily its visible surface,is modified until both function and appearance (design) of the part satisfy the requirements. For plasic parts with character determining product properties,. automobile bumper fascias,product design does not occur on the creen development takes place in a kink of bidding proces in which several stylists (designer)frist prepare plaster patterns,which are then presented to the management of the automotive manufacture in a management makes a selection and agrees on a design ,measurements are taken at various points on the piaster pattern of the select model,and these data are transferred to the CAD these data,the part designer can now start designing the part on the the aid of software programs,the designerbegins to connect the individual points to form 3D transitions are smoothed and the product design is refined until the desired result is achieved. In a subsequent step,the work on the screen is converted into a 3D master pattern through creation of a machining program form the surface data of the maste。