Full length Article: Integration of product design, process planning, scheduling, and FMS control using XML data representation

Authors:
Dušan N Šormaz;Jaikumar Arumugam;Ramachandra S Harihara;Chintankumar Patel;Narender Neerukonda
Affiliations:
Department of Industrial and Systems Engineering, Ohio University, Athens, OH 45701, USA;Department of Industrial and Systems Engineering, Ohio University, Athens, OH 45701, USA;PS&SD Department, Lexmark International Inc., Lexington, KY 40550, USA;Department of Re-engineering, American Express Company, Weston, FL 33331, USA;Department of Professional Services, Compuware Corporation, Independence, OH 44131, USA
Venue:
Robotics and Computer-Integrated Manufacturing
Year:
2010

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Abstract

An efficient model for communications between CAD, CAPP, and CAM applications in distributed manufacturing planning environment has been seen as key ingredient for CIM. Integration of design model with process and scheduling information in real-time is necessary in order to increase product quality, reduce the cost, and shorten the product manufacturing cycle. This paper describes an approach to integrate key product realization activities using neutral data representation. The representation is based on established standards for product data exchange and serves as a prototype implementation of these standards. The product and process models are based on object-oriented representation of geometry, features, and resulting manufacturing processes. Relationships between objects are explicitly represented in the model (for example, feature precedence relations, process sequences, etc.). The product model is developed using XML-based representation for product data required for process planning and the process model also uses XML representation of data required for scheduling and FMS control. The procedures for writing and parsing XML representations have been developed in object-oriented approach, in such a way that each object from object-oriented model is responsible for storing its own data into XML format. Similar approach is adopted for reading and parsing of the XML model. Parsing is performed by a stack of XML handlers, each corresponding to a particular object in XML hierarchical model. This approach allows for very flexible representation, in such a way that only a portion of the model (for example, only feature data, or only the part of process plan for a single machine) may be stored and successfully parsed into another application. This is very useful approach for direct distributed applications, in which data are passed in the form of XML streams to allow real-time on-line communication. The feasibility of the proposed model is verified in a couple of scenarios for distributed manufacturing planning that involves feature mapping from CAD file, process selection for several part designs integrated with scheduling and simulation of the FMS model using alternative routings.