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From the design model to the final workpiece within a CIM environment

Vom Konstruktionsmodell zum Werkstück innerhalb einer CIM-Umgebung
 
: Steger, W.; Haller, T.

Tsinghua University, Beijing:
MODMM '93. International Conference on Modern Design, Manufacturing and Measurement
Beijing: International Academic Publishers, 1993
pp.9-17
International Conference on Modern Design, Manufacturing and Measurement <1993, Beijing>
English
Conference Paper
Fraunhofer IPA ()
Computer Aided Design (CAD); CAM; CIM; data model; data network; Datenmodellierung; digitale Meßtechnik; measuring technology; Messen; Qualitätssicherung; Stereolithographie

Abstract
Due to technological problems physical models of complex shapes still are of great importance e.g. in mould and die production. Two tasks for the metrology of curved surfaces can therefore be specified: on the one hand an initial CAD data model has to be generated on the basis of a physical design model and on the other the actual and nominal shape of a complex surface given by measured point data and a CAD data model has to be compared. In order to improve accuracy, speed and tracability of coordinate measuring and to create a tool for research on new measuring strategies the IPA has developed a measuring system for curved surfaces which is integrated within a CIM system. This system will be introduced in this paper and comprises model making, metrology, CAD/CAM, traditional NC manufacturing and rapid prototyping techniques. The presented measuring software package can be an enhancement to any CAD system open for user applications. By this means measuring and construction sessions tak e place within a common software environment and all of the CAD system's capabilities can be used. The software has been adapted to different CAD systems and is able to interact both with tactile coordinate measuring machines (CMM) and optical sensor systems. For digitizing point data are collected on a physical model by scanning and sent to the CAD system, where the IPA software generated an initial surface description. Based on this model a physical representation can be created to the original model. Finally a CAM system generated NC data for three or five axis milling machines. For inspection the system generated a set of nominal points to be measured based on the CAD model of the surface and on selection criterial given by the user. These inspection points are sent to the CMM. The measured actual points are transmitted to the CAD model of the surface and on selection criteria given by the user. These inspection points are sent to the CMM. The measured actual points are transmitte d

: http://publica.fraunhofer.de/documents/PX-15412.html