Analysis of Adaptive Clamping Force of Fixture Based on Finite Element Method

Abstract

The deformation of the workpiece under the action of clamping force is an important factor that affects the machining accuracy in the machining process. In order to deal with the deformation of such workpiece, the research of machining deformation under the adaptive clamping force of intelligent fixture was carried out based on genetic algorithm and finite element analysis method, and the synchronization and optimization of fixture layout and clamping force were realized. The optimum clamping force of each key clamping position of the fixture is calculated by MATLAB, and the adaptive clamping force optimization design model is established to solve the clamping force curve. Under the same fixture layout, the constant clamping force and the adaptive clamping force are used respectively as the simulation boundary conditions, and the simulation model of the workpiece milling is established. The stress values and deformation after the workpiece are processed under the two clamping forces. The results show that the stress value and the processing deformation under the adaptive clamping force are both smaller, which verifies the validity of the research method.