The goal of this paper is the adaptation of plans of manufacturing processes of Axisymmetric Solid Parts under the approach of Case Based Reasoning (CBR). To this end, a data model for feature-based representation has been developed, which contains the geometric, dimensional and technological information required for the preparation of the one-piece process plan. As a result, an algorithm to generate new parts process plans from a similar plan retrieved from the case base is presented, which is based on the specific information of the Primitive Form Features (PFF) and considers the possible interaction between neighboring PFFs. The computer support of the developed algorithm was implemented in AutoLISP as programming language of the CAD system used and the interface was created in OpenDCL.
Abstract-This research is intended to address the cases retrieval phase related to a CAPP system for axisymmetric solid parts supported by the Case Based Reasoning (CBR). The traits of similarity between two parts were identified from the characteristics of the stock and the finished part. As a result of this work, a function of global similarity metric was obtained, and it incorporates in addition to the geometry of the part and the stock attributes: the type of material, the type of stock and the relationship of the diameter-length dimensions of the part. The results constitute an improvement to the retrieval phase of cases with regard to the retrieval of the most similar case in the repository for the execution of new technical task.
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