An automated coding and classification system with supporting database for effective design of manufacturing systems

The philosophy of group technology (GT) is an important concept in the design of flexible manufacturing systems and manufacturing cells. Group technology is a manufacturing philosophy that identifies similar parts and groups them into families. Beside assigning unique codes to these parts, group technology developers intend to take advantage of part similarities during design and manufacturing processes. GT is not the answer to all manufacturing problems, but it is a good management technique with which to standardize efforts and eliminate duplication. Group technology classifies parts by assigning them to different families based on their similarities in: (1) design attributes (physical shape and size), and/or (2) manufacturing attributes (processing sequence). The manufacturing industry today is process focused; departments and sub units are no longer independent but are interdependent. If the product development process is to be optimized, engineering and manufacturing cannot remain independent any more: they must be coordinated. Each sub-system is a critical component within an integrated manufacturing framework. The coding and classification system is the basis of CAPP and the functioning and reliability of CAPP depends on the robustness of the coding system. The proposed coding system is considered superior to the previously proposed coding systems, in that it has the capability to migrate into multiple manufacturing environments. This article presents the design of a coding and classification system and the supporting database for manufacturing processes based on both design and manufacturing attributes of parts. An interface with the spreadsheet will calculate the machine operation costs for various processes. This menu-driven interactive package is implemented using dBASE-IV. Part Family formation is achieved using a KAMCELL package developed in TURBO Pascal.

[1]  Charles S. Snead.  Group technology : foundation for competitive manufacturing , 1989 .

[2]  Daniel B. Dallas.  Tool and manufacturing engineers handbook : a reference work for manufacturing engineers , 1976 .

[3]  Ali Khosravi-Kamrani.  A methodology for forming machine cells in a computer integrated manufacturing environment using group technology , 1992 .

[4]  Johnz Willett.  Similarity and Clustering in Chemical Information Systems , 1987 .

[5]  Hsu-Pin Wang,et al.  Automated clasification and coding based on extracted surface features in a CAD data base , 1987 .

[6]  Richard A. Wysk,et al.  An Introduction to Automated Process Planning Systems , 1984 .

[7]  Philip M. Wolfe,et al.  Computer integrated design and manufacturing , 1991 .

[8]  John McAuley,et al.  Machine grouping for efficient production , 1972 .

[9]  Herwart Opitz,et al.  A classification system to describe workpieces , 1970 .

[10]  D. W. Goodall.  A New Similarity Index Based on Probability , 1966 .

[11]  J. Temple Black,et al.  The design of the factory with a future , 1991 .

[12]  David C. Eades,et al.  The Inappropriateness of the Correlation Coefficient as a Measure of Taxonomic Resemblance , 1965 .

[13]  R. S. Lashkari,et al.  A heuristic procedure for determining manufacturing families from design-based grouping for flexible manufacturing systems , 1986 .

[14]  Mikell P. Groover,et al.  Automation, Production Systems, and Computer-Integrated Manufacturing , 1987 .

[15]  Michael R. Anderberg,et al.  Cluster Analysis for Applications , 1973 .

[16]  Peter H. A. Sneath,et al.  Numerical Taxonomy: The Principles and Practice of Numerical Classification , 1973 .

[17]  Daoning Ying,et al.  An automated interface between CAD and CAM , 1989 .

[18]  Dan L. Shunk,et al.  Integration of a group technology classification and coding system with an engineering database , 1987 .

[19]  Andrew Kusiak,et al.  Intelligent Manufacturing Systems , 1990 .

[20]  Farid M. L. Amirouche,et al.  Computer-Aided Design and Manufacturing , 1992 .

[21]  Andrew Kusiak,et al.  The part families problem in flexible manufacturing systems , 1985 .