Three dimensional thermal finite element simulation of electro-discharge diamond surface grinding |
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| Affiliation: | 1. College of Mathematics and Econometrics, Hunan University, Changsha 410082, China;2. College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China;1. Department of Civil Engineering, Southeast University, Nanjing 211189, China;2. School of Civil Engineering and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;1. Agathon AG Maschinenfabrik, 4512 Bellach, Switzerland;2. Tyrolit Schleifmittelwerke Swarovski KG, 6130 Schwaz, Austria;1. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin, China;2. Key Laboratory of Advanced Functional Composites, CASC, Beijing, 100076, China;1. Department of Mechanical Engineering, National Institute of Technology Rourkela, 769008, India;2. Department of Mechanical Engineering, National Institute of Technology Karnataka Surathkal, 575025, India;3. Department of Mechanical Engineering, SRM Institute of Science & Technology, Kattankulathur, Chennai, Tamil Nadu 603203, India |
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| Abstract: | The key to achieve good surface integrity in the workpiece due to Electro-Discharge Diamond Grinding (EDDG) process, which is hybrid of grinding and EDM, is by preventing the excessive temperature and thermal stress generated during the process. EDDG in surface grinding mode called Electro-Discharge Diamond Surface Grinding (EDDSG), used for finishing operation, is a complex machining process where several disciplines of science and engineering are involved in its theory. The complexity of the process includes the random occurrence of spark during EDM process and nonlinear behavior of workpiece material includes temperature dependent thermal properties. The present work involves the development of a simulation model to simulate the complex EDDSG process which consists of simulation of each constituent process namely EDM and surface grinding for temperature and thermal stress distribution. In order to simulate the realistic complex conditions, the three dimensional FEM is used in the process of development of the model accounting the random occurrence of the spark during EDM. The effect of different dielectric fluid, duty factor and energy partition during EDM on the temperature distribution and MRR study related to EDM contribution are reported. It is observed that the spark contributes primarily to the temperature. The predicted results can be used to determine the surface integrity of the machined surface. |
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| Keywords: | EDM Surface grinding Hybrid machining Finite element method Electro discharge diamond surface grinding |
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