A Service Reliability Assessment Method for the Rigidity-Flexibility Coupling Open Arc Welding Robot

Abstract:

The open arc welding robots have been used widely nowadays; however, the elastic deformations of every inner link inevitably affect the welding quality. In this paper, it proposes an effective method of service reliability assessment for the rigidity-flexibility coupling open arc welding robot. Firstly, a parametric virtual model of the robot is built in ADAMS/View-AutoFlex module. Secondly, the stochastic errors generated in the working process are simulated by a program created from pseudo-random numbers which have been written by multiplicative congruence method. Lastly, Monte Carlo sampling calculation is implemented for the virtual model, and large sample data of the dynamic characteristics in welding process are obtained and used to calculate the service reliability of the welding robot. This method includes simplicity (no need to solve complex mathematic model) and high accuracy which make it highly promising for application in mechanism design.

• Periodical: Applied Mechanics and Materials (Volumes 365-366)
• Pages: 780-783
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.365-366.780
• Online since: August 2013
• Authors: Xing Han, Chang Li, Xiao Gang Ma
• Keywords: Adam, Monte Carlo, Open Arc Welding Robots, Rigidity-Flexibility Coupling, Service Reliability, Stochastic Error

References

[1] Shanzeng Liu, Zhencai Zhu. Frequency Analysis of a Spatial Rigid-flexible Coupling Parallel Manipulator. Chinese Journal of Mechanical Engineering, 2011, Vol. 47, No. 23, pp.39-41.

DOI: 10.3901/jme.2011.23.039

[2] Chang Li, Xing Han. Reliability virtual test of mechanism motion accuracy[J]. Journal of machine design, 2007, 24(11): 17-20.

[3] Weiguang An, Yinlin Cai. Reliability analysis and optimistic design of the random mechanism system[M], Harbin: Publication of Harbin engineering university, 2005, 26(10): 1175-1182.

[4] Tiejun Wang: Motion Reliability Simulation Based on ADAMS of A Serial-link Robot[D], Shenyang: Northeastern University, 2006. In Chinese.

[5] Tao Yu, Tingting Li. Dynamic Simulation for Rigid-flexible Coupling Model of Slider-crank Press based on ADAMS. Journal of Mechanical Transmission. 2012(3), 64-66.

[6] Yi Wang, Liyan Wu, Liu Geng. Research of Modeling Flexible-rigid System Based on Mechanism. Journal of System Simulation, Vol. 19 No. 20, Oct., 2007, pp.4708-4710.

[7] Xing Han, Chang Li. A Study on the 6-6 Stewart Parallel Mechanism Dynamics in ADAMS. The 2012 3rd International Conference on Advances in Product Development and Reliability (PDR2012). Vol. 544(2012), pp.67-71.