E. Toklu*, F. Erzincanli

Duzce University, Duzce, Turkey, *ethemtoklu@duzce.edu.tr.

ABSTRACT

In this study a numerical model on radial flow and pressure distribution showing regions of negative values which tend to levitate products is developed. The end effector operates on the principle of generating a high-speed fluid flow between the end effector and product surface thereby creating a vacuum which levitates the product. The Navier-Stokes equations and the equation of continuity describing the flow between the nozzle and material are numerically solved by finite volume discretization method. The lifting forces and conditions are discussed by comparing numerical results with experimental findings.

Keywords: Radial flow, robotic handling, non-contact end effector, levitation, lifting force.

References

[1] Erzincanli F and Sharp JM, "Non-contact end effector for robotic handling of compliant products", Proceedings of the Thirty-first Inter. MATADOR Conf., Manchester, 629-634, 1995.         [ Links ]

[2] Erzincanli F, Sharp JM and Dore AM, "Grippers for handling of non-rigid food products", Proceeding of EURISCON '94, Malaga. 3, 798-806, 1994.         [ Links ]

[3] Erzincanli F, "A non-contact end effector for robotic handling of non-rigid materials", PhD Thesis, University of Salford, Salford, 1995.         [ Links ]

[4] Ferreira RTS, Deschamps C J and Prata AT, "Pressure distribution along valve reeds of hermetic compressors", Experimental Thermal and Fluid Sciences, 2, 201-207, 1989.         [ Links ]

[5] Heilala J, Ropponen T and Airila M, "Mechatronic design for industrial grippers", Mechatronics, 2/3, 239-255, 1992.         [ Links ]

[6] Kayabasi O, Erzincanli F, "Shape optimization teeth profile of flexspline for harmonic drive by finite element method", Materials and Design, volume 28, issue 2, Pages 441-447, 2007.         [ Links ]

[7] Madwed A, "A new gripper system to handle many different parts for assembly by robots", Robotics International of SME Robots Conference, 11.83-11.96, (1985).         [ Links ]

[8] Moller PS. "Radial flow without swirl between parallel discs", The Aeronautical Quarterly, May, pp: 163-186, 1963.         [ Links ]

[9] Pham D T and Heginbotham WB, "Robot Grippers", IFS Bedford, and Springer-Verlag Berlin, 1986.         [ Links ]

[10] Possamai FC, Ferreira RTS and Prata AT, "Pressure distribution in laminar radial flow through inclined disks", Int. J. of Heat and Fluid Flow, 22, 440-449, 2001.         [ Links ]

[11] Schneider RT, "End effectors take hold-in robotics", Hyd. and Pneums., 40-42, 1992.         [ Links ]

[12] Simonton W, "Robotic end effector for handling greenhouse plant material", Transaction of the ASAE, 34/6, 2615-2621, 1991.         [ Links ]

[13] Tella R, Birk JR and Kelley RB, "General purpose hands for bin-picking robots", IEEE Transaction on System, Man and Cybernetics, 12/6, 828-837, 1982.         [ Links ]