Design Guidance of Jig/Fixture for Flexible Manufacturing System

유연조립 시스템에서의 Jig/Fixture 설계에 관한 연구

  • Published : 2007.01.01


This paper presents a design guidance of jig/fixture for flexible manufacturing system based on the verification of a base assembly motion instability. In flexible assembly system, the base assembly needs to be maintained in its assembled state without being taken apart. This requires stability in motion while the base assembly is handled or tilted. Therefore, the instability of the base assembly motion should be considered when determining the guide line of designing jig/fixture by evaluating a degree of the motion instability of the base assembly. To derive the instability, first we inference collision free assembly directions by extracting separable directions for the mating parts and calculate the separability which gives informations as to how the parts can be easily separated. Using these results, we determine the instability evaluated by summing all the modified separabilities of each component part within base assembly.


Jig/Fixture;Base Assembly;Instability;Separable Directions;Flexible Manufacturing


  1. Park, T. H. and Lee, B. H., 1991, 'An Approach to Robot Motion Analysis and Planning,' Proceedings of the IEEE International Conference on Robotics and Automation, sacramento, CA, pp. 70-75
  2. Maekawa, H., Yokoi, K., Tanie, K. and Kaneko, M., 1991, 'Position/Stiffness based Manipulation by Three-fingered Robot Hand,' Proceedings of ISART, March 5-7, pp. 597-603
  3. Wilhelm, W. E., 1988, 'Conveyor Tracking,' Int. Encyclopedia of Robotics: Applications and Automation, R.C.Dorf, Ed, New York: John Wiley & Sons, Inc., pp. 283-298
  4. Nee, A. Y. C. and Poo, A. N., 1990, 'Expert CAD systems for Jigs and Fixture in Artificial Intelligence in Design (edited by D.T.Pham),' IFS/Springer, London
  5. Huang, Y. F. and Lee, C. S. G., 1991, 'A Framework of Knowledge-based Assembly Planning,' Proceedings of the IEEE International Conference on Robotics and Automation, sacramento, CA, pp.599-604
  6. Pham, D. T. and Sam Lazaro, A., 1993, 'Autofix-Expert CAD System for Jigs and Fixtures,' International Journal of Machine and Tools Manufacturing, Vol.30, No.3, pp. 403-411
  7. Kim, I. H., Cho, K. K., Oh, J. S. and Lee, S. H., 1995, 'Integration of Fixture Planning for machining Processes,' Journal of Korean Institute of Industrial Engineers, Vol.21, No.1, March, pp. 51-65
  8. Shin, C. K. and Cho, H. S., 1994, 'On The Generation of Robotic Assembly planning based on Separability and Assembly Motion Stability,' Robotica, Vol.12, pp. 7-15
  9. Homem de Mello, L. S. and Sanderson, A. C. , 1990, 'AND/OR Graph Representation of Assembly Plans,' IEEE Transaction on Robotics and Automation, Vol.6, No.2, pp. 188-199
  10. Cho, D. Y. and Cho, H. S., 1993, 'Inference on Robotic Assembly Precedence Constraints Using Part Contact Level Graph,' Robotica, Vol.11, 173-183
  11. Lee, S. H., 1990, 'Assembly Planning based on Subassembly Extraction,' IEEE Transaction on Robotics and Automation, Special Issue on Manufacturing Systems: Design, Planning, Scheduling and Real-Time Control, pp. 1-30
  12. Kim, J. D., Cho, Y. S. and Lee, J. W., 2003, 'Virtual Space Calibration for Laser Vision Sensor Using Circular Jig,' Journal of Korean Society of Precision Engineering, Vol.20, No.12, December, pp. 73-79