Optimization of laser forming parameters using genetic algorithms

Subject Areas : Finite Element Modeling

Rasoul Tarkesh Esfahani ¹ , Sa'id Golabi ² , zahra zojaji ³

1 - Assistant Professor Faculty of Engineering Najafabad branch Islamic Azad University
2 - Department of Mechanical Engineering, Kashan University, Kashan, Iran
3 - Young Researchers and Elite Club, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Received: 2019-02-12 Accepted : 2019-06-19 Published : 2019-03-01

Keywords: Multi objective genetic algorithm, Optimization, Laser forming, Circular scanning path, Deflection,

Abstract :

The use of lasers is being considered as a modern method for forming process in recent years. This method has been used in various industries, such as aerospace, marine and oil industry. Extensive research has been done in the field of modeling and optimization of direct paths parameters with process of laser forming. Although forming in circular paths can be used for producing complex parts, due to some technical reasons, it is considered less. The main purpose of this paper is to detect the proper estimation model and obtain optimal variables conditions for complete circular paths in perforated circular parts by means of genetic algorithms. In this process the outer edges are fixed and the inner edges are being formed by laser. At first, the finite element simulation model is studied then the estimation model has been discussed, after that multi-objective functions have been examined with the least error and energy. Furthermore, the optimization results of the internal hole diameters are reported and analyzed in terms of Pareto charts. In conclusion, optimum forming conditions have been reported in terms of accuracy and energy for different diameters of holes. This study shows with acceptable increasing in the error rate, the required energy could be reduced. Also, increasing in the diameter of inside hole cause to increase energy and decrease of accuracy.