Multi-dimensional force tracking-loading simulator development and simulation experiment for five-axis machining center

Abstract

Aiming at the problems of insufficient loading dimension and difficult engineering application of CNC machine tool reliability test device, a low-cost, recyclable multi-dimensional force tracking-loading simulator is developed based on the conical test piece. First of all, according to the principle of homogeneous coordinate system transformation and rigid body hypothesis theory to establish a five-axis machining center cutting force model, derive the cutting force expression of the machining center during the cutting process. Secondly, based on Ansys, the super elastomer rubber ring model for loading is established, and through nonlinear dynamics simulation, it explores the change rule of the integrated force on the spindle with different cutting depth and rubber ring thickness. Then, the loading test is carried out on a five-axis linked machining center to verify the feasibility of the multi-dimensional force tracking-loading simulator and the multidimensional loading capacity, which provides a new loading mean and theoretical basis for the reliability test of CNC machine tools. Finally, by comparing the simulation and experiment results, it is concluded that when the rubber ring thickness is 3 mm, the comprehensive cutting force fluctuation of the five-axis machining center is the smallest, and the relative error between the experiment comprehensive force and the simulation comprehensive force is 19.8%, which is the best thickness of the rubber ring under loading test.