Research Areas

We have been working on three major areas, machining data management, life cycle facility management and computer aided disassembly for product recycling.
(1) Machining data management
We are trying to establish the uniform data flow from CAD to machining processes so as to realize efficient, reliable and flexible production. For this purpose, we are developing machining model which can contain all data associated with machining operations. This model should be accessed from all steps of the machining data generation process. In addition, it should be accessed from NC controllers and operators so as to record data about actual machining processes and operators' know-how. These types of information are useful for improving the model used for machining data generation.

The process of machining data generation is assisted by a model based machining simulation system which we have been developing in our laboratory. It can evaluate physical parameters of machining process such as cutting force and machining error in addition to change in workpiece geometry during machining process based on machining process models as well as geometric models of workpieces and tools.

(2) Life cycle facility management
The objective of maintenance is to maintain the facility at its full performance throughout its life cycle. For achieving this goal, it is necessary to provide a powerful information infrastructure and computer tools, because we have to manage various kinds of information along a long period of time. Therefore, we have been working on the facility model which could be a information base for the facility life cycle management. We have also developing a data model for representing deterioration and failure cases which were experienced in actual operations.

For the purpose of the facility life cycle management, we are taking twofold approaches. One is proactive evaluation of potential problems which may occur during the facility life cycle. Only by predicting potential problems, can you devise countermeasures. The other is to collect actual experiences and to feedback them to the facility development, and operation and maintenance planning.

With regard to the former approach, we have been developing two kinds of systems. One is a deterioration evaluation system of facility components and the other is a life cycle simulation system. The former system performs qualitative evaluation of potential deterioration at specified area of facility components by means of case based reasoning. The latter system performs quantitative evaluation of deterioration induced by accumulation of stress and resultant functional degradation. Currently, we are trying to apply the system to operation and maintenance planning of robot manipulators.
The information about occurrences during the operation which could be utilized in the facility design and operation and maintenance planning is called MP information. We are trying to develop a system for gathering the MP information and extracting useful rules from it.

(3) Computer aided disassembly for product recycling
Realizing efficient disassembly operations are important for facilitating product recycling. We are studying a computer aided disassembly planning system which can be used for design for disassembly and for assisting disassembly operators .
Professor Dr.Eng.
  Okubo 3-4-1,Shinjuku, Tokyo 169-8555, JAPAN
  tel.+81-3-5286-3299  fax.+81-3-3202-2543
  ©2011 LiME LABORATORY, School of Science and Engineering, Waseda University