Fabrication of a Complicated Specimen with Two Point Incremental Forming Process

ADMT Journal

مقاله 9، دوره 12، شماره 4، اسفند 2019، صفحه 83-88   

نوع مقاله: Original Article

نویسندگان

Mehdi Safari^* ؛ Jalal Joudaki

Department of Mechanical Engineering, Arak University of Technology, Iran

چکیده

Manufacturing of complicated industrial components is one of the main challenges for mechanical engineers in sheet metal forming processes. Incremental sheet metal forming (ISMF) is used widely for forming complicated shapes by a single rotating tool. This paper examines the experimental investigation of two-point incremental forming of a complicated specimen made of AA3105 aluminum alloy. The part shape consists of positive and negative cavities and the shape complexity limits the manufacturing process to two-point incremental forming process (TPIF). In addition, the effects of selected process parameters such as forming depth in each increment of process, tool rotational speed and various forming patterns on thickness distribution and thinning percentage of specimen are investigated. The forming pattern includes the sequence of forming the cavities (Internal/External pattern and External/Internal pattern). The main finding of the study can be expressed that the thinning ratio of manufactured specimen is increased with an increase in the forming depth in each increment of TPIF. Also, the higher rotational speed leads to a reduction in the thinning of the fabricated specimen. The results prove that the use of Internal/External forming pattern leads to reduction in the thinning of the manufactured specimen. 

کلیدواژه‌ها

Forming Increment؛ Forming Pattern؛ Thickness Distribution؛ Two-Point Incremental Forming؛ Tool Rotational Speed

مراجع

[1]     Silva, M. B., Martins, P. A. F., Two-Point Incremental Forming with Partial Die: Theory and Experimentation, Journal of Materials Engineering and Performance, Vol. 22, No. 4, 2013, pp. 1018–1027, DOI: 10.1007/s11665-012-0400-3.

[2]     Garcia-Romeu, M. L., Ceretti, E., Fiorentino, A., and Giardini, C., Forming Force Prediction in Two Point Incremental Forming Using Backpropagation Neural Networks in Combination with Genetic Algorithms, Proceedings of ASME 2010 International Manufacturing Science and Engineering Conference, Pennsylvania, USA, 2010.

[3]     Meier, H., Smukala, V., Dewald, O., and Zhang, J., Two Point Incremental Forming with Two Moving Forming Tools, Key Engineering Materials, Vol. 344, 2007, pp. 599–605, DOI: 10.4028/www.scientific.net/KEM.344.599.

[4]     Jeswiet, J., Duflou, J. R., and Szekeres, A., Forces in Single Point and Two Point Incremental Forming, Advanced Materials Research, Vol. 6-8, 2005, pp. 449–456, DOI: 10.4028/www.scientific.net/AMR.6-8.449.

[5]     Fiorentino, A., Force-based Failure Criterion in Incremental Sheet Forming, International Journal of Advanced Manufacturing Technology, Vol. 68, 2013, pp. 557–563, DOI: 10.1007/s00170-013-4777-4.

[6]     Eftekhari, S. A., Fazli, A., A Novel Strategy for Improvement of Sheet Thickness Distribution in Incremental Sheet Metal Forming Process, Modares Mechanical Engineering, Vol. 16, No. 7, 2016, pp. 61–70.

[7]     Nikdooz, A. H., Mirnia, M. J., and Baseri, H., Study of Formability of Aluminum Truncated Pyramid in Single-Stage and Two-Stage Incremental Sheet Forming, Modares Mechanical Engineering, Vol. 16, No. 5, 2016 pp. 210–220.

[8]     Jackson, K., Allwood, J., The Mechanics of Incremental Sheet Forming, Journal of Materials Processing Technology, Vol. 209, No. 3, 2009, pp. 1158–1174, DOI: 10.1016/j.jmatprotec.2008.03.025.

[9]     Göttmann, A., Korinth, M., Schäfer, V., Araghi, B. T., Bambach M., and Hirt, G., Manufacturing of Individualized Cranial Implants Using Two Point Incremental Sheet Metal Forming, In: Schuh G, Neugebauer R, Uhlmann E, editors. Future Trends in Production Engineering. Berlin, Heidelberg: Springer, 2013, pp. 287–295.

[10]  Duflou, J. R, Verbert, J., Belkassem, B., Gu, J, Sol, H., Henrard, C., Habraken, A. M., Process Window Enhancement for Single Point Incremental Forming Through Multi-Step Toolpaths, CIRP Annals, Vol. 57, 2008, pp. 253–256, DOI: 10.1016/j.cirp.2008.03.030.

[11]  Azaouzi, M., Lebaal, N., Tool Path Optimization for Single Point Incremental Sheet Forming Using Response Surface Method, Simulation Modelling Practice and Theory, Vol. 24, 2012, pp. 49–58, DOI: 10.1016/j.simpat.2012.01.008.

[12]  Duflou, J. R., Vanhove, H., Verbert, J., Gu, J., Vasilakos, I., and Eyckens, P., Twist Revisited: Twist Phenomena in ingle Point Incremental Forming, CIRP Annals, Vol. 59, No. 1, 2010, pp. 307–310, DOI: 10.1016/j.cirp.2010.03.018.

[13]  Vanhove, H., Verbert, J., Gu, J., Vasilakos, I., and Duflou, J. R., An Experimental Study of Twist Phenomena in Single Point Incremental Forming, International Journal of Material Forming, Vol. 3, No. 1, 2010, pp. 975–978, DOI: 10.1007/s12289-010-0932-8.

[14]  Malhotra, R., Cao, J., Beltran, M., Xu, D., Magargee, J., Kiridena, V., and Xia Z. C., Accumulative-DSIF Strategy for Enhancing Process Capabilities in Incremental Forming, CIRP Annals, Vol. 61, No. 1, 2012, pp. 251–254, DOI: 10.1016/j.cirp.2012.03.093.