Evaluation of Gun Support Structure Using Equivalent Dynamic Approach in Non Linear FEA

Abstract:

Robot Gun structure is an efficient way in which multiple welds can be done simultaneously. However mounting several weld guns on a single structure induces a variety of dynamic loads, especially during movement of the robot arm as it maneuvers to reach the weld locations.The primary idea employed in this paper, is to model those dynamic loads as equivalent G force loads in FEA. This approach will be on the conservative side, and will be saving time and subsequently cost efficient. The approach of the paper is towards creating a standard operating procedure (SOP) when it comes to analysis of such structures, with emphasis on deploying various technical aspects of FEA such as Non Linear Geometry, Multipoint Constraint Contact Algorithm, Multizone meshing .

• Periodical: Applied Mechanics and Materials (Volume 376)
• Pages: 331-335
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.376.331
• Online since: August 2013
• Authors: Sunil Shukla, H. S. Deshmukh, Patil Vinaay, B.A. Thite A.
• Keywords: Finite Element Analysis (FEA), Geometric NL, Robot Gun Structure, Stress Reduction

References

[1] R. Jaydeep, L. Whitcomb, Structural Design Optimization and Comparative Analysis of a New High-Performance Robot Arm via Finite Element Analysis, International Conference on Robotics and Automation April (1997) 2190-2197.

DOI: 10.1109/robot.1997.619287

[2] M. Palmonella, M. I. Friswell, J. E. Mottershead, A. W. Lees, Finite element models of spot welds in structural dynamics: review and updating, Computers and Structures 83 (2005) 648–661.

DOI: 10.1016/j.compstruc.2004.11.003

[3] ANSYS, ANSYS User's Manual Version 14. 0, ANSYS Inc, (2011).

[4] J. F. Abel, M. S. Shephard, An algorithm for multipoint constraints in finite element analysis, International Journal for Numerical Methods in Engineering 14(1979) 464–467.

DOI: 10.1002/nme.1620140312

[5] Information on http: /www. gforces. net.

[6] H.S. Lukatcha, R.M. Echon, M.B. MacIver, P.M. Werchan, G-force induced alterations in rat EEG activity: a quantitative analysis, Electroencephalography and clinical Neurophysiology 103 (1997) 563–573.

DOI: 10.1016/s0013-4694(97)00063-1

[7] Y. Ning, Y. Loke, G. Mckinnon, Fabrication and characterization of high g-force silicon peizoresistive accelerometers, Sensors and actuators 48(1995) 55-61.

DOI: 10.1016/0924-4247(95)00981-7

[8] P. Dizio, J. R. Lackner, Influence of gravitoinertial force level on vestibular and visual velocity storage in yaw and pitch, Vision research 32(1992) 111–120.

DOI: 10.1016/0042-6989(92)90119-4

[9] S. C. Fowler, Effects of pimozide on emitted force, duration and rate of operant response maintained at low and high levels of required force, Pharmacology Biochemistry and Behavior 25(1986) 615–622.

DOI: 10.1016/0091-3057(86)90150-4

[10] N. S. Gokhale, S. S. Deshpande, S. V. Bedekar, A. N. Thite, Practical Finite Element Analysis, First Edition, Finite to Infinite, Pune, (2008).

[11] Carlos Felippa, Geometric Non Linear Analysis of ISO-P quadratic element, University of Colarado at Boulder, (2011).

[12] S. Ramachandran, T. Nagarajan, N. Siva Prasad, Finite element approach to the design and dynamic analysis of platform type robot manipulators, Finite Elements in Analysis and Design. 10 (1992) 335-350.

DOI: 10.1016/0168-874x(92)90020-d

[13] G. J. Chung, D. H Kim, H. Shin, H. J. Ko, Structural Analysis of 600Kgf Heavy Duty Handling Robot, IEEE Conference on Robotics, Automation and Mechatronics. (2010) 40-45.

DOI: 10.1109/ramech.2010.5513216

[14] D. H. Kim, G. J. Chung, and C. H. Park, Analysis of Heavy Duty Robot for Design, KSMTE 2007 Spring Conference Proceedings (2007) 125-130.