計算機在模具設(shè)計中的應(yīng)用外文翻譯-文庫吧資料
2025-05-21 17:30本頁面
【正文】 eadily converts representations of curves and surface without loss of accuracy (3D geometries). Dimensions, text, views, and other 2D drawing elements cannot be exchanged via VDAFS (1986 DIN Standard VDA/VDMA 66301). Use: Germany and Europe. IGES This is one of the first useful data interfaces for exchange primarily 2D formats. With more recent IGES versions, it is also possible to exchange 3D information. Use:USA. SET This interface is important in the automotive and aircraft industries (Airbus) in France but isnot used outside France. Despite the continued development of interface systems and more than 15 years of application, data loss is still not unmon. In many cases, such difficulties during data transfer mean that the drawing (part drawing) once again bees the medium by which information (data) must be conveyed. Current efforts aim to bine the above161。 附件 2：外文原文 （復(fù)印件） The puter in die design The term CAD is alternately used to mean puter aided desing and puter dided it can mean either one or both of these concepts,and the tool designed will have ccasion to in both forms. CAD puter dided design means using the puter and peripheral devices t simplify and enhance the design puter aided drafting means using the puter and peripheral devices to produce the documentation and graphics for the design documentation usually includes such things as preliminary drawings,working drawings,parts lists,and design calculations. A CAD system,whether taken to mean puter aided design system or puter aided drafting system,consists of three basic ponents:hardware,software, hardware poents of a typical CAD system include a processor,a system display,a keyboard,a disgitizer,and a software ponent of a CAD system consists of the programs which allow it to perform desgn and drafting user is the tool designer who user the hardware and software to simplify and enhance the design process. Graphics displays represented the frist real step toward bringing the worlds of tool design dad the puter plotters depicted in Figure,represented the next the advent of the digitizing tabiet in the early 1960’s,CAD hardware as we know it today began to development of puter graphics software follow soon after these hardware developments. Early cad system were large,cumbersome,and expensive,in fact that only the largest panies could afford the late 1960’s CADwas looked on as an interesting,but impractical novelty that had only limited potential in tool design ,with the introduction of the silicon chip during the 1970’s,puters began to take their place in the world of tool design. Intergratedcircuits on silion chips allowed full scale puted to be packaged in small consoles no larger than ”miniputers”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 an
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