Numerical simulation of the single point incremental forming : Improvement of the force prediction
Résumé
In this paper, a new coupling approach Process/Machine applied to Robotized Single Point Incremental Forming (RSPIF) is presented. This approach consists in coupling a Finite Element Analysis (FEA) of the process with an elasto-geometrical modeling of the robot to improve the geometrical accuracy of the trajectory. The FEA, assuming a rigid structure, is first used to evaluate the forces at the interface be-tween the tool and the sheet during the forming stage. These forces are then intro-duced as input data of the elasto-geometrical model of the robot, to predict the tool path deviations and to correct the trajectory. In order to make efficient the tool path correction, the weight of three numerical and material parameters of the FEA on the predicted forces is investigated. Finally, the efficiency of the proposed method is vali-dated by the comparison of the numerical and experimental geometries obtained with or without correction of the tool path.