Journal of Applied and Computational Mechanics
Numerical Analysis of the Deformation of a Shearing Machine Tool under Excessive Blade Clearance
Document Type : Research Paper
Authors
Manufacturing Technology Section, School of Mechanical Engineering, National Technical University of Athens, Heroon Polytehniou 9, 15780 Athens, Greece
Abstract
Guillotine shearing machines for metal sheet may be inadvertently operated at increased blade clearance. Typical cases were studied using commercially available finite element software with an explicit solver. Loads causing elastic deformation to the machine structure arise from plastic deformation of the sheet metal being processed, its behavior being modelled by modified Johnson-Cook law. Excessive clearance was found to overload the machine considerably compared to normal clearance, owing to considerable lateral forces. As a result, the guillotine and much less so the base of the machine, undergo oscillatory deformation and the sheet is partly sheared and mostly bent. Such analysis helps the designer understand structural issues of the machine tool in extreme situations and modify the design appropriately.
Keywords
Main Subjects
[1] Wu, X., Bahmanpour, H., Schmid, K., Characterization of mechanically sheared edges of dual phase steels, Journal of Materials Processing Technology, 212(6), 2012, 1209–1224.
[2] Maiti, S.K., Ambekar, A.A., Singh, U.P., Date, P.P., Narasimhan, K., Assessment of influence of some process parameters on sheet metal blanking, Journal of Materials Processing Technology, 102(1-3), 2000, 249–256.
[3] Kibe, Y., Okada, Y., Mitsui, K., Machining accuracy for shearing process of thin-sheet metals-Development of initial tool position adjustment system, International Journal of Machine Tools and Manufacture, 47(11), 2007, 1728–1737.
[4] Ma, L. Feng, Huang, Q.Χ., Huang, Z., Chu, Z.Β., Tian, Y.Q., Establishment of Optimal Blade Clearance of Stainless Steel Rolling-Cut Shear and Test of Shearing Force Parameters, Journal of Iron and Steel Research International, 19(9), 2012, 52–61.
[5] Gustafsson, E., Karlsson, L., Oldenburg, M., Experimental study of forces and energies during shearing of steel sheet with angled tools, International Journal of Mechanical and Materials Engineering, 11(1), 2016, 10.
[6] Mackensen, A., Golle, M., Golle, R., Hoffmann, H., Experimental investigation of the cutting force reduction during the blanking operation of AHSS sheet materials, CIRP Annals, 59(1), 2010, 283–286.
[7] Kopp, T., Stahl, J., Demmel, P., Tröber, P., Golle, R., Hoffmann, H., Volk, W., Experimental investigation of the lateral forces during shear cutting with an open cutting line, Journal of Materials Processing Technology, 238, 2016, 49–54.
[8] Gustafsson, E., Oldenburg, M., Jansson, A., Design and validation of a sheet metal shearing experimental procedure, Journal of Materials Processing Technology, 214(11), 2014, 2468–2477.
[9] Yoshida, Y., Elastic clearance change in axisymmetric shearing process, in: Proceedings of the 19th International ESAFORM Conference on Material Forming, 27–29 April 2016, Nantes, France, (eds: F. Chinesta, E. Cueto, E. Abisset-Chavanne) AIP Conference Proceedings 1769, (1), 150003, 2016 (online), AIP Publishing LLC.
[10] Ramamurti, V., Sasikiran, S., Vinod Kumar, P., Dynamic analysis of a guillotine shearing machine, Journal of Materials Processing Technology, 71(2), 1997, 202–214.
[11] Wisselink, H.H., Analysis of guillotining and slitting, finite element simulations, Ph.D. Thesis, Department of Mechanical Engineering, University of Twente, 2000.
[12] Brokken, D., Brekelmans, W.A.M., Baaijens, F.P.T., Numerical modelling of the metal blanking process, Journal of Materials Processing Technology, 83(1-3), 1998, 192–199.
[13] Saanouni, K., Belamri, N., Autesserre, P., Finite element simulation of 3D sheet metal guillotining using advanced fully coupled elastoplastic-damage constitutive equations, Finite Elements in Analysis and Design, 46(7), 2010, 535–550.
[14] Berti, G.A., Monti, M., Numerical modelling of sheet metal guillotining process, in Proceedings of the 13. Round Table: Simulation in der Umformtechnik, (ed.M. Wohlmuth) 23-25 April 2012, Bamberg, Germany, 262-271.
[15] Li, Y.G., Ye, Q., Fan, F., Bao, Y., Huang, Q.X., Finite Element Method Analysis of Effect of Blade Clearance on Plate Shearing Process, Journal of Iron and Steel Research International, 19(10), 2012, 26–29.
[16] Atkins, A.G., On cropping and related processes, International Journal of Mechanical Sciences, 22(4), 1980, 215–231.
[17] Atkins, A.G., On the mechanics of guillotining ductile metals, Journal of Materials Processing Technology, 24, 1990, 245–257.
[18] Stegeman, Y.W., Goijaerts, A.M., Brokken, D., Brekelmans, W.A.M., Govaert, L.E., Baaijens, F.P.T., An experimental and numerical study of a planar blanking process, Journal of Materials Processing Technology, 87(1-3), 1999, 266–276.
[19] Yu, S., Xie, X., Zhang, J., Zhao, Z., Ductile fracture modeling of initiation and propagation in sheet-metal blanking processes, Journal of Materials Processing Technology, 187, 2007, 169–172.
[20] Lemiale, V., Chambert, J., Picart, P., Description of numerical techniques with the aim of predicting the sheet metal blanking process by FEM simulation, Journal of Materials Processing Technology, 209(5), 2009, 2723–2734.
[21] Husson, C., Correia, J.P.M., Daridon, L., Ahzi, S., Finite elements simulations of thin copper sheets blanking: Study of blanking parameters on sheared edge quality, Journal of Materials Processing Technology, 199(1-3), 2008, 74–83.
[22] Subramonian, S., Altan, T., Ciocirlan, B., Campbell, C., Optimum selection of variable punch-die clearance to improve tool life in blanking non-symmetric shapes, International Journal of Machine Tools and Manufacture, 75, 2013, 63–71.
[23] Marouani, H., Ben Ismail, A., Hug, E., Rachik, M., Numerical investigations on sheet metal blanking with high speed deformation, Materials and Design, 30(9), 2009, 3566–3571.
[24] Subramonian, S., Altan, T., Campbell, C., Ciocirlan, B., Determination of forces in high speed blanking using FEM and experiments, Journal of Materials Processing Technology, 213(12), 2013, 2184–2190.
[25] Bolt, P.J., Sillekens, W.H., Prediction of shape aberrations due to punching, shearing and slitting, Journal of Materials Processing Technology, 103(1), 2000, 87–94.
[26] Kalpakjian, S., Schmid, S.R., Musa, H., Manufacturing Engineering and Technology, Prentice Hall, Singapore- London, 2010.
[27] Ramamurti, V., Rajaram, H., Balasubramaniam, M., Dynamic analysis of two types of over-crank guillotine shears—a comparative study, Journal of Materials Processing Technology, 83(1-3), 1998, 54–61.
[28] Zavdoveev, A., Rogante, M., Poznyakov, V., Heaton, M., Acquier, P., Kim, H.S., Baudin, T., Kostin, V., Development of the PC-GMAW welding technology for TMCP steel in accordance with welding thermal cycle, welding technique, structure, and properties of welded joints, Reports in Mechanical Engineering, 1(1), 2020, 26–33.
[29] Fragassa, C., Minak, G., Pavlovic, A., Measuring deformations in the telescopic boom under static and dynamic load conditions, Facta Universitatism Series: Mechanical Engineering, 18(2), 2020, 315–328.
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