畢業(yè)設計外文翻譯沖壓模具設計成型方面-在線瀏覽
2024-08-10 12:06本頁面
【正文】 Time schedule for a mass produced car body panelThe timetable of an SE project Within the context of the production process for car body panels,only a minimal amount of time is allocated to allow for the manufacture of the large scale dies there is a runup period of about 10 months in which design and die tryout are plex SE projects,which have to be pleted in to 2 years,parallel tasks must be carried ,additional resources must be provided before and after delivery of the short periods call for precise planning,specific knowhow,available capacity and the use of the latest technological and munications timetable shows the individual activities during the manufacturing of the dies for the production of the sheet metal parts().The time phases for large scale dies are more or less similar so that this timetable can be considered to be valid in general.Data record and part drawingThe data record and the part drawing serve as the basis for all subsequent processing describe all the details of the parts to be produced. The information given in the Timetable for an SE projectpart drawing includes: part identification,part numbering,sheet metal thickness,sheet metal quality,tolerances of the finished part etc.(). To avoid the production of physical models(master patterns),the CAD data should describe the geometry of the part pletely by means of line,surface or volume a general rule,high quality surface data with a pletely filleted and closed surface geometry must be made available to all the participants in a project as early as possible.Process plan and draw developmentThe process plan,which means the operational sequence to be followed in the production of the sheet metal ponent,is developed from the data record of the finished part().Already at this point in time,various boundary conditions must be taken into account:the sheet metal material,the press to be used,transfer of the parts into the press,the transportation of scrap materials,the undercuts as well as thesliding pin installations and their adjustment. The draw development, puter aided design and layout of the blank holder area of the part in the first forming stage–if need bealso the second stage–,requires a process planner with considerable experience().In order to recognize and avoid problems in areas which are difficult to draw,it is necessary to manufacture a physical analysis model of the draw this model,theforming conditions of the drawn part can be reviewed and final modifications introduced,which are eventually incorporated into the data record(). This process is being replaced to some extent by intelligent simulation methods,through which the potential defects of the formed ponent can be predicted and analysed interactively on the puter display.Die designAfter release of the process pl
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