Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Use of Finite Element Method to Validate the Temperature Field of a 5-axis Machining Center
Submission Author:
Marcelo Otavio dos Santos , SP
Co-Authors:
Marcelo Otavio dos Santos , Ed Claudio Bordinassi, Gilmar Batalha
Presenter: Marcelo Otavio dos Santos
doi://10.26678/ABCM.COBEM2017.COB17-2666
Abstract
In current manufacturing processes, 5-axis machining centers play an important role machining parts with complex geometry and that require high dimensional accuracy. This research aims to develop an efficient method to simulate the thermal-structural performance of a 5-axis machining center, through the study of their main subassemblies such as ball screw system, linear guides and spindle under real load conditions. The methodology was based on an experimental survey of the machine’s thermal behavior using temperature sensors and thermal imaging, with simultaneously numerical validation using the Finite Elements Method (FEM), under adequate boundary conditions. The temperature gradient at predetermined periods could be obtained by FEM, through an interface model that includes frictional contact, heat exchange in the contact area, frictional heating and convective heat exchange. The results of the simulations show that the methodology is an effective tool to determine the thermal field of the machine correlating the reading of temperatures at strategic points obtaining a maximum error of less than 9.6%. The conclusion is that the method, when considered appropriate boundary conditions, is a proper feature for simulating the machine’s thermal behavior, which can still be used in the design phases of the equipment.
Keywords
5-axis machining center, Finite Element Method, Thermal field measurement, Thermal field simulation, Friction heat generation
