Abstract
Cooper foils are widely used in micro electronic industry, and they are suitable to be deep drawn to form cup-like parts. In this study, micro deep drawing experiments were conducted by using T2 copper foils after an annealing process, and three scale factors (λ = 0.5, 1, and 2) were set to indicate effects of proportional decreased tool dimensions and processing parameters on the forming result. The experimental results show that micro deep drawing parts with internal diameters of 0.5, 1.0, and 2.0 mm can be formed successfully. And the 0.5-mm cup drawing part has achieved the minimum dimension in recent reports. The standardized punch travel-deep drawing force curves are similar, and the maximum deep drawing force is decreased with smaller scale factor. The thickness distributions of different processing parameters are all decreased firstly and then show the trend to increase from bottom to upper regions. We find that the size effect influences the maximum deep drawing force during the forming process and the quality of forming part. And the maximum limit drawing ratio (LDR) is 2.2 for the experiment with scale factor of 0.5. Forming regularities of the proportional decreased micro deep drawing process can be presented clearly by changing the scale factor.
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References
Schubert A, Jahn SF, Müller B (2014) Modular tool concept and process design for micro impact extrusion. Precis Eng 38(1):57–63
Geiger M, Kleiner M, Eckstein R, Tiesler N, Engel U (2001) Microforming. CIRP Ann Manuf Technol 50(2):445–462
Fu MW, Wang JL, Korsunsky AM (2016) A review of geometrical and microstructural size effects in micro-scale deformation processing of metallic alloy components. Int J Mach Tool Manu 109:94–125
Irthiea IK, Green G (2016) Evaluation of micro deep drawing technique using soft die-simulation and experiments. Int J Adv Manuf Technol 89:1–12
Yao Z, Mei D, Tang P, Chen Z (2014) On the size effects in micro/meso semisolid extrusion–forging of A356 aluminum alloy. Int J Adv Manuf Technol 73(9):1243–1252
Meng B, Fu MW (2015) Size effect on deformation behavior and ductile fracture in microforming of pure copper sheets considering free surface roughening. Mater Des 83:400–412
Wang JL, Fu MW, Ran JQ (2014) Analysis of size effect on flow-induced defect in micro-scaled forming process. Int J Adv Manuf Technol 73:1475–1484
Gong F, Guo B, Wang CJ, Shan DB (2011) Micro deep drawing of micro cups by using DLC film coated blank holders and dies. Diam Relat Mater 20:196–200
Irthiea I, Green G, Hashim S, Kriama A (2014) Experimental and numerical investigation on micro deep drawing process of stainless steel 304 foil using flexible tools. Int J Mach Tool Manu 76:21–33
Luo L, Wei DB, Wang XG, Zhou CL, Huang QG, Xu JZ, Wu D, Jiang ZY (2017) Effects of hydraulic pressure on wrinkling and earing in micro hydro deep drawing of SUS304 circular cups. Int J Adv Manuf Technol 90:189–197
Saotome Y, Yasuda K, Kaga H (2001) Microdeep drawability of very thin sheet steels. J Mater Process Technol 113:641–647
Wang CJ, Guo B, Shan DB, Bai XM (2013) Experimental research on micro-deep drawing processes of pure gold thin sheet using DLC-coated female die. Int J Adv Manuf Technol 67(9):2477–2487
Geng XL, Wang B, Zhang YJ (2013) Effect of crystalline anisotropy and forming conditions on thinning and rupturing in deep drawing of copper single crystal. J Mater Process Technol 213:574–580
Chan WL, Fu MW (2015) Experimental studies and numerical modeling of the specimen and grain size effects on the flow stress of sheet metal in microforming. Mater Sci Eng A 528:7674–7683
Chan WL, Fu MW, Lu J (2011) The size effect on micro deformation behaviour in micro-scale plastic deformation. Mater Des 32:198–206
Gong F, Guo B, Wang CJ, Shan DB (2010) Effects of lubrication conditions on micro deep drawing. Microsyst Technol 16:1741–1747
Wang CJ, Wang CJ, Guo B, Shan DB (2014) Effects of tribological behavior of DLC film on micro-deep drawing processes. Trans Nonferrous Metal Soc China 24:2877–2882
Gong F, Yang Z, Chen Q (2015) Influences of lubrication conditions and blank holder force on micro deep drawing of C1100 micro conical-cylindrical cup. Precis Eng 42:224–230
Lin J, Zhao S, Zhang ZF, Wang ZQ (2009) Deep drawing using a novel hydromechanical tooling. Int J Mach Tool Manu 49:73–80
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This work was supported by the National Natural Science Foundation of China under Grant Number 51275129.
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Wang, G., Li, Y., Liu, S. et al. Micro deep drawing of T2 copper foil using proportional decreased tools. Int J Adv Manuf Technol 95, 277–285 (2018). https://doi.org/10.1007/s00170-017-1111-6
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DOI: https://doi.org/10.1007/s00170-017-1111-6