Automatic Modification of Local Drilling Holes via Double Pre-Assembly Holes

Qiubai Yan, Wenliang Chen

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

DOI: 10.4236/wjet.2015.33C028                

Abstract

Manufacturing accuracy, especially position accuracy of fastener holes, directly affects service life and security of aircraft. The traditional modification has poor robustness, while the modification based on laser tracker costs too much. To improve the relative position accuracy of aircraft assembly drilling, and ensure the hole-edge distance requirement, a method was presented to modify the coordinates of drilling holes. Based on online inspecting two positions of pre-assembly holes and their theoretical coordinates, the spatial coordinate transformation matrix of modification could be calculated. Thus the straight drilling holes could be modified. The method improves relative position accuracy of drilling on simple structure effectively. And it reduces the requirement of absolute position accuracy and the cost of position modification. And the process technician also can use this method to decide the position accuracy of different pre-assembly holes based on the accuracy requirement of assembly holes.

Keywords

Position Accuracy, Holes Position Modification, Automatic Drilling, Pre-Assembly Holes, Online Inspecting

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Wang, L.M. and Feng, T.N. (2008) Application of Digital Automatic Drill-Riveting Technology in Aircraft Manufacture. Aeronautical Manufacturing Technology, 11, 42-45.
[2]	Lin, C.T. and Wang, M.J. (1999) Human-Robot Interaction in an Aircraft Wing Drilling System. International Journal of Industrial Ergonomics, 23, 83-94. http://dx.doi.org/10.1016/S0169-8141(97)00103-0
[3]	Bi, S. and Jie, L. (2011) Robotic Drilling System for Tita-nium Structures. The International Journal of Advanced Manufacturing Technology, 54, 767-774. http://dx.doi.org/10.1007/s00170-010-2962-2
[4]	Olsson, T., Haage, M., Kihlman, H., Johansson, R., Nilsson, K., Robertsson, A., et al. (2010) Cost-Efficient Drilling Using Industrial Robots with High-Bandwidth Force Feedback. Robotics and Computer-Integrated Manufacturing, 26, 24-38. http://dx.doi.org/10.1016/j.rcim.2009.01.002
[5]	Xu, G.K. (2008) Automatic Assembly Technology for Large Aircraft. Acta Aeronautica et Astronautica Sinica, 29, 734-740.
[6]	Russell, D.V., Kevin, S., Ed, F. and John, I. (2002) ONCE (One-Sided Cell End Effector) Robotic Drilling System.
[7]	Qu, W.W., Dong, H.Y. and Ke, Y.L. (2011) Pose Accuracy Compensation Technology in Robot Aided Aircraft Assembly Drilling Process. Acta Aeronautica et Astronautica Sinica, 32, 1951-1960.
[8]	Zhu, W., Mei, B. and Yan, G. (2014) Measurement Error Analysis and Accuracy Enhancement of 2D Vision System for Robotic Drilling. Robotics and Computer-Integrated Manufacturing, 30, 160-171. http://dx.doi.org/10.1016/j.rcim.2013.09.014
[9]	Huang, M.H. and Lin, Q. (2009) Functions of Orthogonal Matrix in Spatial Coordinate Transformation. Studies in College Mathematics, 12, 24-26.