0
TECHNICAL PAPERS

Effect of Mechanical Alignment System on Assembly Accuracy

[+] Author and Article Information
Neville K. S. Lee, Grace H. Yu, J. Y. Chen, Ajay Joneja

Dept. of IEEM, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

J. Manuf. Sci. Eng 125(3), 595-608 (Jul 23, 2003) (14 pages) doi:10.1115/1.1580848 History: Received April 01, 2003; Online July 23, 2003
Copyright © 2003 by ASME
Your Session has timed out. Please sign back in to continue.

References

Xie, C., Guo, Z., and Chen, X., 1994, “A New Approach to Improvement Assembly Accuracy on Robot Automatic Assembly Line,” Procs 2nd Asian Conf on Robotics and Its Applications, Int. Acad. Publishers, pp. 121–125.
Xie, C., Tang, X., Shao, M., and Zheng, J., 1997, “Accuracy Analysis and Modeling of Robot Flexible Assembly Process,” Procs 3rd ACRA, 3rd Asian Conf on Robotics and its Applications, Japan Robot Assoc., pp. 109–113.
Pugh,  G. A., 1992, “Selective Assembly with Components of Dissimilar Variance,” Computers and Industrial Engineering, 23 (1–4), pp. 487–491.
Park,  Y. K., and Cho,  H. S., 1993, “A Fuzzy Rule-based Assembly Algorithm for Precision Parts Mating,” Mechatronics, 3(4), pp. 433–450.
Ceglarek,  D., Shi,  J., and Wu,  S. M., 1994, “A Knowledge-Based Diagnostic Approach for the Launch of the Auto-body Assembly Process,” ASME J. Eng. Ind., 116(4), pp. 491–499.
Zhang,  Z., and Fang,  X. D., 1996, “Fit Capability Indices and Their Application,” Int. J. Prod. Res. 34(11), pp. 3079–3094.
Kim,  W. S., and Cho,  H. S., 1998, “A Novel Omnidirectional Image Sensing System for Assembling Parts with Arbitrary Cross-sectional Shapes,” IEEE/ASME Trans. Mechatron., 3(4), pp. 275–292.
Ceglarek,  D., and Shi,  J., 1996, “Fixture Failure Diagnostic for Autobody Assembly Using Pattern Recognition,” ASME J. Eng. Ind., 118(1), pp. 55–65.
Asada,  H., and By,  A., 1985, “Kinematic Analysis of Workpart Fixyuring for Flexible Assembly with Automatically Reconfigurable Fixtures,” IEEE J.Rob. Autom. , RA-1(2), pp. 86–94.
Weill, R., Darel, I., and Laloum, M., 1991, “The Influence of Fixture Positioning Errors on Geometric Accuracy of Mechanical Parts,” Proceedings of CIRP Conference on PE & MS, pp. 215–225.
Cai,  W., Hu,  S. J., and Yuan,  J. X., 1997, “A Variational Method of Robust Fixture Configuration Design for 3-D Workpieces,” ASME J. Manuf. Sci. Eng., 119, pp. 593–601.
Rong,  Y., and Bai,  Y., 1996, “Machining Accuracy Analysis for Computer-aided Fixture Design Verification,” ASME J. Manuf. Sci. Eng., 118, pp. 289–299.
Shawki,  G. S. A., and Abdel-Alal,  1965, “Rigidity Consideration in Fixture Design-Contact Rigidity at Locating Elements,” Int. J. Mach. Tool Des. Res., 6, pp. 31–43.
Shawki,  G. S. A., and Abdel-Aal,  1965, “Rigidity Consideration in Fixture Design-Contact Rigidity of Clamping Elements,” Int. J. Mach. Tool Des. Res., 6, pp. 207–220.
Shawki,  G. S. A., and Abel-Aal,  1965, “Effect of Fixture Rigidity and Wear on Dimensional Accuracy,” Int. J. Mach. Tool Des. Res., 5, pp. 183–202.
Hockenberger,  M. J., and DeMeter,  E. C., 1995, “The Effect of Machining Fixture Design Parameters on Workpiece Displacement,” ASME Journal of Manufacturing Review, 8 (1), pp. 22–32.
DeMeter,  E. C., 1995, “Min-max Load Model for Optimizing Machining Fixture Performance,” ASME J. Eng. Ind., 117, pp. 186–193.
Cogun,  C., 1992, “The Importance of the Application Sequence of Clamping Forces on Workpiece Accuracy,” ASME J. Eng. Ind., 114, pp. 539–543.
Choudhuri,  S. A., and DeMeter,  E. C., 1999, “Tolerance Analysis of Machining Fixture Locators,” ASME J. Manuf. Sci. Eng., 121, pp. 273–281.
Hoffman, E. G., 1991, Jig and Fixture Design, 3rd ed., Delmar, NY.
Ackerson,  D. S., and Harry,  D. R., 1985, “Theory, Experimental Results, and Recommended Standards Regarding the Static Positioning and Orientation Precision of Industrial Robots,” Robotics and CIM, 2(3/4), pp. 247–259.
Lau,  W. S., and Ng,  K. L., 1992, “Experimental and Statistical determination of the static position repeatability and a recommended specification for a SCARA robot,” Computer-Integrated Manufacturing, 9(3), pp. 247–253.
Lee,  N. K. S., Chen,  J. Y., and Joneja,  A., 2001, “Effects of Surface Roughness on Multi-Station Mechanical Alignment Process,” ASME J. Manuf. Sci. Eng., 123, pp. 433–444.
Fung,  A. K., and Chen,  M. F., 1985, “Numerical Simulation of Scattering from Simple and Composite Random Surfaces,” J. Opt. Soc. Am. A, 2(12), pp. 2274–2284.
Yisok, O. H., 1997, “Precise Estimation of Surface Roughness Parameters from Field-measured Ground Truth,” IEEM, IGARSS’97, 1997 International Geoscience and Remote Sensing Symposium, Remote Sensing-A Scientific Vision for Sustainable Development (Cat. No. 97CH36042), IEEE, Vol. 2, pp. 708–710.
Whitehouse,  D. J., and Archard,  J. F., 1970, “The Properties of Random Surfaces of Significance in Their Contact,” Proc. R. Soc. London, Ser. A, 316(1524), pp. 97–121.

Figures

Grahic Jump Location
Assembly imprecision due to dimensional errors (a) fabrication station; (b) Assembly station
Grahic Jump Location
Alignment variation due to dimensional error
Grahic Jump Location
Alignment variation due to angular error
Grahic Jump Location
Ideal and actual contact conditions between datum and reference surfaces
Grahic Jump Location
Shifting of the reference surface due to the shifting of the workpiece
Grahic Jump Location
Multi-step processing of workpiece (a) Workstation 1; (b) Workstation 2
Grahic Jump Location
Superimposition of positions of a workpiece at two workstations
Grahic Jump Location
Moving averaged theoretical surface roughness profile, RMS=1 μm
Grahic Jump Location
Moving averaged theoretical surface waviness profile, RMS=4 μm
Grahic Jump Location
Generated datum surface RMS=0.04 μm
Grahic Jump Location
Flow chart of simulation algorithm on alignment precision
Grahic Jump Location
Relationship between datum and workpiece
Grahic Jump Location
Effect of datum radius on multiple station process with reference surface roughness=0.1 μm
Grahic Jump Location
Effect of datum radius on multiple station process with reference surface roughness=1 μm
Grahic Jump Location
Effect of datum radius on multiple station process with reference surface roughness=5 μm
Grahic Jump Location
Schematic of planar datum MAS with workpiece imperfection
Grahic Jump Location
Multiple alignment positions due to workpiece imperfection
Grahic Jump Location
Schematic of error translation
Grahic Jump Location
Schematic of MAS with truncated datum
Grahic Jump Location
Schematic figure on how to reason the workpiece direction
Grahic Jump Location
Same orientation tolerance different location tolerance (a)&(b): Datum location tolerance=0.002 mm, orientation tolerance=0.02 grad; (c)&(d): Datum location tolerance=0.02 mm, orientation tolerance=0.02 grad; (e)&(f ): Datum location tolerance=0.2 mm, orientation tolerance=0.02 grad.
Grahic Jump Location
Same location tolerance different orientation tolerance (a)&(b): Datum location tolerance=0.02 mm, orientation tolerance=0.002 grad; (c)&(d): Datum location tolerance=0.02 mm, orientation tolerance=0.02 grad; (e)&(f ): Datum location tolerance=0.02 mm, orientation tolerance=0.2 grad.

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