icemsurf 文件数据结构.ppt

1、*Geometry Objects,Points and Point Sets,Raw Data Segments and Raw Data Contours,Scans and Scan Sets,Curve Segments and Curves,*Hierarchy of the Geometry Data,exercise,-to display element structure,H:ota-trainingkddatwison1,*Import - Pro/ENGINEER - Pro/ENGINEER :File - Export - Model - Neutral Notes:

2、 -Curves and surfaces which are not available in Bezier, B-Spline, or NURBS representation, will be converted to Bezier, B-Spline, or NURBS curves or surfaces when being imported. -In Pro/ENGINEER only trimmed surfaces are used. If a trimmed patch is identical with the original patch, only the origi

3、nal patch will be imported. However, the identifier of the edges will be preserved.,*Export - Pro/ENGINEER Notes: -Exported Pro/ENGINEER files get the extension *.icm , which is automatically added to the filenames when being exported. -Pro/ENGINEER files exported from ICEM Surf are re-imported in P

4、ro/ENGINEER with the function Import Feature - ICEM . -In order to preserve the associativity in Pro/ENGINEER after geometry modifications in ICEM Surf, it is important to write always into the same file. Only this way, the identification of modifications towards the last import is guaranteed.,*Many

5、 solid modeling packages have problems dealing with surface quilts from surfacing packages. Here are some tips for making that data exchange easier. Stitching problems only exist when the matching and facing tolerances are neglected by the user Do not face faces - create a string of curve segments t

6、o face a patch Do not face with face edges Do not face with diagnosis data Set tolerances in facing to deviation 0.001 and gap 0.001 The selected order has to be equal to or greater than the order of the face curve The computer gives an acoustic and visual signal, when the tolerance is exceeded The

7、figure on the window next to the deviation tolerance shows the tolerance required to create the last face When this figure is larger than the given tolerance, some faces might be rejected by I-DEAS Check single faces for gaps or little loops, which indicate corrupt faces This is very important to all ICEM AFFS users as well as any user that delivers ICEM Surf data into a parametric system.,*NOTE,exercise,1.check model,2. Export to pr