Simulação estrutural de um quadro frontal de forno de fogão

Abstract

The present work aims to simulate the set of the front frame plus the door of the Supreme 4 burner stove, aiming to propose a possible improvement in the current geometry of the frame and cost reduction, ensuring sufficient resistance for the flexion of the door not to exceed 15 mm, this being the maximum limit for the safety test of the stove, according to NBR 13732-1. The justification for this study is based on the need for companies to become increasingly competitive in the market and projects that implement cost reductions and at the same time maintain product quality play a relevant role in this result, especially in white goods that are produced in large volumes. In addition to the improvement of the frame, the work aims to understand the behavior of the structure through numerical simulation, representing the conditions of the door bending test. The process created for this work is divided into two stages, first defined the basic mathematical model for the simulation of door bending that is the Supreme 4 mouths and was calibrating the model based on the results of the normative test. Step 2 involves proposals of new frames, for comparative analysis with the base model using it as input data to simulate the new geometries. Proposals include variations in thickness, implementations of different ribs and structural reinforcements. Based on the results obtained, it was possible to define the limit thickness that can be used of 0.6 mm and verify that ribs far above the guide do not bring gains to the stiffness of the frame. Finally, we arrived at a geometry capable of maintaining the current thickness of the frame used in the Supreme 4 burner stove, without the need to use the reinforcement currently employed, only adapting the geometry, generating a maximum flexion of 13.46 mm, disregarding crunching effects which brings greater safety to the results, because this in practice tends to be smaller, In this way, generating a cost reduction for the product in question.