Two point incremental forming of a complicated shape with negative and positive dies

Document Type: Research Paper

Author

Arak University of Technology

Abstract

In this work, incremental sheet forming of a complicated shape is investigated experimentally. Two point incremental forming with negative and positive dies are employed for manufacturing of a complicated shape with positive and negative truncated cones. The material is aluminum alloy 3105 with a thickness of 1 mm. The effects of process parameters such as sequence of positive and negative forming processes, step depth (incremental depth) and rotational speed of the tool on the maximum achievable outer and inner heights for the proposed specimen are investigated. The selected ranges for the step depth and rotational speed are 0.2 mm - 0.6 mm and 0-1000 rpm, respectively. The results show that both maximum achievable outer and inner heights of the specimen are increased with change of Positive/Negative variant to Negative/Positive variant. Also, the results prove that both maximum achievable outer and inner heights are increased with decreasing in the step depth and increasing in the rotational speed of the tool. An optimum parameter combination (Negative/Positive, step depth = 0.2 mm and rotational speed = 1000 rpm) is obtained to get the both maximum achievable outer and inner heights using the signal to noise ratio analysis.

Keywords


[1] L.M. Lozano-Sánchez, A.O. Sustaita, M. Soto, S. Biradar, L. Ge, E. Segura-Cárdenas, J. Diabb, L.E.
Elizalde, E.V. Barrera, A. Elías-Zúniga, Mechanical and structural studies on single point incremental
forming of polypropylene-MWCNTs composite sheets, Journal of Materials Processing Technology 242
(2017) 218–227.
[2] Y. Li, William J.T. Daniel, Zhaobing Liu, Haibo Lu, Paul A. Meehan, Deformation mechanics and efficient
force prediction in single point incremental forming, Journal of Materials Processing Technology 221(2015)
100–111.
[3] C. Raju, C. Sathiya Narayanan, Application of a hybrid optimization technique in a multiple sheet single point
incremental forming process, Measurement 78 (2016) 296–308.
[4] C. Raju, C. Sathiya Narayanan, FLD and Fractography Analysis of Multiple Sheet Single Point Incremental
Forming, Transactions of the Indian Institute of Metals 69(6) (2016) 1237–1243.
[5] M. J. Mirnia, B. Mollaei Dariani, H. Vanhove, J. R. Duflou, Thickness improvement in single point incremental
forming deduced by sequential limit analysis, The International Journal of Advanced Manufacturing Technology
70(9) (2014) 2029–2041.
[6] R. Bahloul, H. Arfa, H. BelHadjSalah, A study on optimal design of process parameters in single point
incremental forming of sheet metal by combining Box–Behnken design of experiments, response surface
methods and genetic algorithms, The International Journal of Advanced Manufacturing Technology, 74(1)
(2014) 163–185.
[7] I. Bagudanch, M. Sabater, M. L. Garcia-Romeu, Single Point versus Two Point Incremental Forming of
thermoplastic materials, Advances in materials and processing technologies 3(1) (2017) 135-144.
[8] B. Silva, A. F., Martins, Two-point incremental forming with partial die: Theory and experimentation, Journal
of Materials Engineering and Performance, 22(4) 2012 1018−1027.
[9] S. Matsubara, A computer numerically controlled dieless incremental forming of a sheet metal, J. Eng. Manuf.
215 (2001) 959–966.
[10] A. Attanasio, E. Ceretti, C. Giardini, L. Mazzoni, Asymmetric two points incremental forming: improving
surface quality and geometric accuracy by tool path optimization, J. Mater. Process. Technol. 197 (2008) 59–67.
[11] G. Hirt, J. Ames, M. Bambach, Basic Investigation into the Characteristics of Dies and Support Tools Used in
CNC-Incremental Sheet Forming, Proceedings of the International Deep Drawing Research Group Conference,
IDDRG, Porto, Portugal, (2006) 341–348.
[12] M. Vahdati, R. A. Mahdavinejad, S. Amini, M. Moradi, Statistical analysis and optimization of factors affecting
the surface roughness in the UVaSPIF process using response surface methodology, Journal of Advanced
Materials and Processing 3(1) (2015) 15-28.
[13] O. Engler, Control of texture and earing in aluminium alloy AA 3105 sheet for packaging applications,
Materials Science and Engineering A 538 (2012) 69–80.
[14] Walpole, R. E., Myers, R. H., Probability and statistics for engineers and scientists, Second ed., Macmillan
Publishing Company, New York (1978).
[15] Hicks, C. R., Turner, K. V., Fundamental concepts in the design of experiments, 5th ed., Oxford University
Press, New York (1999).