0
Research Papers: Applications

Configuration of Noncontact Grip System for Carrying Large Flat Sheets Using Vacuum Air Heads

[+] Author and Article Information
Joon Hyun Kim

Department of Mechanical
and Automotive Engineering,
Seoul National University of Science and Technology,
232 Gongneung-ro,
Nowon-gu 139-743, South Korea
e-mail: joonk61@seoultech.ac.kr

Se-Jin Lee

Division of Mechanical
and Automotive Engineering,
Kongju National University,
1223-24, Cheonan-daero, Seobuk-gu,
Cheonan-si 330-710,
Chungcheongnam-do, South Korea
e-mail: sejiny3@kongju.ac.kr

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received November 24, 2014; final manuscript received April 16, 2015; published online July 9, 2015. Assoc. Editor: Min Zou.

J. Tribol 137(4), 041103 (Oct 01, 2015) (8 pages) Paper No: TRIB-14-1289; doi: 10.1115/1.4030710 History: Received November 24, 2014; Revised April 16, 2015; Online July 09, 2015

This paper configured an improved grip system for gripping and transferring large flat sheets in a noncontact manner. The conventional method for changing the direction of large flat sheets in a conveyor system is to turn the system itself. The new configured grip system applied a noncontact pneumatic head in the vertical direction, with the use of an air levitation table, and L-shaped latches, to lift and rotate large flat sheets to change their direction in the conveyor system. The pneumatic heads made efficient use of a vortex flow and an internal flow guide to improve the swirling flow. The gripping force for the improved head with the inner flow guide was 10% higher than that for the conventional head. To construct a rotational grip system, 12 improved noncontact heads and eight pairs of L-shaped latches were used to provide gripping force against an eight generation liquid crystal display (LCD) glass as a 4:6 ratio, each other. With a partial levitation force from the air blow table, the head-and-latch configuration resulted in the overall glass flatness approaching within 3.0 mm on the lower side at a selected grip rotation height of 40 mm.

Copyright © 2015 by ASME
Your Session has timed out. Please sign back in to continue.

References

Chang, Y.-S., Chang, H.-S., Choi, J.-B., Kim, Y.-J., Chun, P.-H., and Kong, J.-Y., 2008, “Flow and Dynamic Characteristics Between FPD and Contact-Free Handler Nozzles,” Adv. Mater. Res., 33–37, pp. 1089–1094. [CrossRef]
Kim, J. H., 2012, “Design of the Air Pressure Pick-Up Head for Non-Contact Wafer Gripper,” J. Korean Soc. Mach. Tool Eng., 21(3), pp. 401–407. [CrossRef]
Dini, G., Fantoni, G., and Failli, F., 2009, “Grasping Leather Plies by Bernoulli Grippers,” CIRP Ann. Manuf. Technol., 58(1), pp. 21–24. [CrossRef]
Li, X., Kawashima, K., and Kagawa, T., 2008, “Analysis of Vortex Levitation,” Exp. Therm. Fluid Sci., 32(8), pp. 1448–1454. [CrossRef]
LaMagna, J. L., 1990, “Air Pressure Pick-Up Tool,” U.S. Patent No. 4,969,676.
Safabakhsh, A. R., 1992, “Non-Contact Pick-Up Head,” U.S. Patent No. 5,169,196.
Siniaguine, O., and Steinberg, G., 2000, “Non-Contact Holder for Wafer-Like Articles,” U.S. Patent No. 6,099,056.
Lee, H. G., and Lee, D. G., 2006, “Design of a Large LCD Panel Handling Air Conveyor With Minimum Air Consumption,” Mech. Mach. Theory, 41(7), pp. 790–806. [CrossRef]
Yassouri, Y., and Hasolelim, K., 2007, “Method for Cleaning Surfaces Using Parallel Flow,” U.S. Patent No. 0175499 A1.
Jung, H. J., 2012, “Apparatus for Transferring of Glass Panel,” KR Patent No. 1011876790000.
Lee, T. G., Yu, J. S., Jung, H. J., Kim, J.-H., and Kim, J. H., 2013, “Development of the Air Floating Conveyor System for the Large Glass Sheet,” J. Korean Soc. Mach. Tool Eng., 22(4), pp. 635–642. [CrossRef]
Kim, J. H., Jeong, Y. S., Lee, T. G., Kim, T. H., and Jung, H. J., 2013, “Non-Contact Level on Air Levitation Table With Porous Chamber Array,” J. Korean Soc. Mach. Tool Eng., 22(6), pp. 913–920. [CrossRef]
Devitt, A. J., 2011, “Non-Contact Porous Air Bearing and Glass Flattening Device,” U.S. Patent No. 79088584 B2.
Davis, S., Gray, J. O., and Caldwell, D. G., 2008, “An End Effector Based on the Bernoulli Principle for Handling Sliced Fruit and Vegetables,” Rob. Comput. Integr. Manuf., 24(1), pp. 249–257. [CrossRef]
Erzincanli, E., Sharp, J. M., and Erhal, S., 1998, “Design and Operational Considerations of a Non-Contact Robotic Handling System for Non-Rigid Materials,” Int. J. Mach. Tools Mater., 38(4), pp. 353–361. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Basic configuration of air floating conveyor

Grahic Jump Location
Fig. 2

Schematic view of vortex flow inside the head

Grahic Jump Location
Fig. 3

Factors affecting performance of a noncontact head

Grahic Jump Location
Fig. 4

Sectional view of head with an internal flow guide

Grahic Jump Location
Fig. 5

Computational domain

Grahic Jump Location
Fig. 6

Pressure distribution according to gap distance (e)

Grahic Jump Location
Fig. 7

Net force (excluding weight) on sample surface according to gap distance

Grahic Jump Location
Fig. 8

Pressure distribution according to internal head height (i.e., depth)

Grahic Jump Location
Fig. 9

Pressure distribution according to working pressure

Grahic Jump Location
Fig. 10

Velocity contours in vertical single layer

Grahic Jump Location
Fig. 11

Pressure distribution with application of curved flow guide

Grahic Jump Location
Fig. 12

Measurement of noncontact gap distance under various working pressures using a microcamera

Grahic Jump Location
Fig. 13

Schematic view of rotational grip system with heads

Grahic Jump Location
Fig. 14

Glass deflection versus discharge velocity of air blow unit

Grahic Jump Location
Fig. 15

Frame structure with multiple heads and cylinder-type latches

Grahic Jump Location
Fig. 16

Comparison of deflection when frame was lifted without and with partial or full levitation applied

Grahic Jump Location
Fig. 17

Glass deflection according to lifting force per head at both edges and center region

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In