Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Design of a forming die using CAx solutions
Submission Author:
André Cesar Martins De Miranda , MG
Co-Authors:
André Cesar Martins De Miranda, Lidianne de Paula Pinto Mapa, Bruno Henrique Lourenço Camargos
Presenter: André Cesar Martins De Miranda
doi://10.26678/ABCM.COBEM2021.COB2021-2095
Abstract
In the last decades, with the advance of computing and engineering software, the use of high-tech solutions has become a strategic differential in the development of most diversified projects and products, allowing their use in practically all stages of the project life cycle, from conception to manufacturing. Due to the complexity of die design, especially regarding to dimensioning, the use of computational solutions becomes particularly interesting. Even today, in many companies, the design of these dies is made only based on experimental and empirical knowledge, which generates a higher degree of insecurity and risk of malfunction, avoiding possible improvements in terms of safety, quality and reduction of manufacturing costs of these dies. In this context, this work intends to present a methodology for designing forming dies using computational engineering solutions. The pre-dimensioning of the die will be presented using CAD (Computer Aided Design) software, integrated to the structural validation using the FEA (Finite Element Analysis). Manufacturing is approached by the flattening of the parts with complex geometry, the construction of the manufacturing drawings, as well as the preparation of CNC machining programs (Computer Numerical Control) using CAM resources (Computer Aided Manufacturing). The workpiece to be conformed is a spherical segment, made of structural steel ASTM-A36. This type of component is used in several equipment, such as pressure vessel heads, and can be designed in different dimensions, shapes and materials. Likewise, the methodology presented in this work can be applied in the conception of dies for different designs of workpieces, except by making some adjustments. Due to the similarity between the upper and lower parts of the die, only the lower die part will be addressed in this work. Since the proposed work requires the use of CAD, CAE and CAM tools, it was chosen the software Siemens NX 7.0, as it presents all these features integrated on the same platform. The study has demonstrated feasibility to the product design cycle using this method, allowing the development, validation and assistance of the machining process. Some factors were not considered in this study, such as the prediction of the spring back effect in the die design, simulations referring to the part's conformation and sizing the welds.
Keywords
Forming, Finite Element Analysis, CAD, CAE, CAM
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