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The International Journal of Advanced Manufacturing Technology

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12-08-2020 | ORIGINAL ARTICLE

Thermal modeling and experimental investigation on the influences of the process parameters on warm incremental sheet metal forming of titanium grade 2 using electric heating technique

Authors: R. Mohanraj, S. Elangovan

Published in: The International Journal of Advanced Manufacturing Technology | Issue 1-2/2020

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Abstract

Incremental sheet metal forming (ISMF) is one of the most innovative flexible processes for small volume production of complex sheet metal components. Formability of titanium grade 2 sheets is limited at room temperature and can be improved by forming at elevated temperature. Therefore, warm ISMF process has been explored to enhance the material formability. In this paper, thermal model has been proposed to predict the effect of temperature on the formability of sheet metal in warm ISMF process. Sine law has been used to determine the final thickness of the formed sheets. Experimental investigations on titanium grade 2 sheet at warm temperature has been carried out to study the effects of incremental depth, wall angle, and temperature on formability, geometrical accuracy, and thickness reduction during warm ISMF process using Taguchi L9 orthogonal array. Based on the experimental results, it was found that titanium grade 2 sheets formed with incremental depth of 0.1 mm and temperature of 300 °C showed higher formability with geometrical deviation of 1.52% and thickness reduction of 37.90%. Predictions of thermal model are validated by experimental work, and it has been found that experimental results are in good agreement with the thermal model. Analysis of variance (ANOVA) was used to identify the percentage contribution of each process parameters. To analyze the fracture behavior of the formed component, fractography study has been carried out using scanning electron microscopy (SEM).

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Title: Thermal modeling and experimental investigation on the influences of the process parameters on warm incremental sheet metal forming of titanium grade 2 using electric heating technique
Authors: R. Mohanraj
S. Elangovan
Publication date: 12-08-2020
Publisher: Springer London
Published in: The International Journal of Advanced Manufacturing Technology / Issue 1-2/2020
Print ISSN: 0268-3768
Electronic ISSN: 1433-3015
DOI: https://doi.org/10.1007/s00170-020-05851-4

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