Shape accuracy analysis of multi-point forming process for sheet metal under normal full constrained conditions
Source abstract
Abstract
In order to study the shape accuracy of multi-point forming (MPF) process for sheet metal under normal full constrained conditions, the in-depth analysis of shape accuracy of workpieces in multi-point forming with individually controlled force-displacement (MPF-ICFD) process is conducted in this paper by combining experiment, theoretical analysis and numerical simulation. The influences of normal force, material thickness and material properties on the shape accuracy of the feature surface are studied, and the shape accuracy characteristics of the sheet under different parameters are obtained. Afterwards, the stress and strain characteristics of sheets are obtained by numerical simulation. Finally, the effect of normal force on shape accuracy was revealed by establishing a mechanical model of the sheet metal under normal full constrained conditions. Moreover, the amount of springback reduction in MPF-ICFD is defined quantitatively. Compared with the normal unconstrained conditions, the shape accuracy of sheet metal is improved significantly under normal full constrained conditions. The stress and plastic deformation are more uniform and the amount of springback is smaller. For Q 295 steel plate with thickness of 2.0 mm, the difference between the maximum value and the minimum value of the reaction force of punch decreases from 4515.9 N to 1475 N when the forming force is 2500 N. Besides, the bending moment of the sheet on the unit width decreases from 357.9 N • mm to 328.1 N • mm. The average shape error E rr and the amount of springback Δk decreases by 60.05% and 16.03%, respectively.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metal Forming Simulation Techniques · Laser and Thermal Forming Techniques · Metallurgy and Material Forming
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
Show source-provided references
1. Paunoiu V, Cekan P, Gavan E, Nicoara D (2008) Numerical simulations in reconfigurable multipoint forming. Int J Mater Form 1(1):181–18410.1007/s12289-008-0021-4 ↗
2. Behrooz ZD, Behnam D, Ali VS (2015) Investigation of deep drawing concept of multi-point forming process in terms of prevalent defects. Int J Mater Form 10(2):193–203
3. Gong XP, Li MZ, Lu QP, Peng ZQ (2012) Research on continuous multi-point forming method for rotary surface. J Mater Process Tech 212(1):227–23610.1016/j.jmatprotec.2011.09.008 ↗
4. Walczyk DF, Lakshmikanthan J, Kirk DR (1998) Development of a reconfigurable tool for forming aircraft body panels. J Manuf Syst 17(4):287–29610.1016/S0278-6125(98)80076-9 ↗
5. Li MZ, Cai ZY, Sui Z, Han QG (2002) Multi-point forming technology for sheet metal. J Mater Process Technol 129(1–3):333–338
6. Le L, Young HS, Seong CH, Beom SK, Jeong K (2010) Numerical simulations on reducing the unloading springback with multi-step multi-point forming technology. Int J Adv Manuf Technol 48(1):45–61
7. Edwin H, Robert CS, John MP (2002) Design and test of a reconfigurable forming die. J Manuf Process 4(1):77–8510.1016/S1526-6125(02)70134-5 ↗
8. Boers SHA, Schreurs PJG, Geers MGD (2004) Optimum path and discrete 3D forming http://www.mate.tue.nl/mate/pdfs/5933.pdf
9. Liu ZW, Li MZ, Han QG (2012) Multi-point forming with wrinkle resistance function and its forming accuracy. Stroj Vestn-J Mech E 48(12):56–62
10. Li MZ, Liu YH, Su SZ, Li GQ (1999) Multi-point forming: a flexible manufactruing method for a 3-d surface sheet. J Mater Process Technol 87(1–3):277–280
11. Jia BB, Wang WW (2016) New process of multi-point forming with individually controlled force-displacement and mechanism of inhibiting sprinback. Int J Adv Manuf Technol 90(9):3801–3810
12. Zhang QF, Cai ZY, Zhang Y, Li MZ (2013) Springback compensation method for doubly curved plate in multi-point forming. Mater Des 47:377–38510.1016/j.matdes.2012.12.005 ↗
13. Yan AM, Klappka I (2008) Springback in stretch forming process of aeronautic panel production by finite element simulation. Int J Mater Form 1(1):201–20410.1007/s12289-008-0026-z ↗
14. Braga MT, Moreira Filho LA, Menezes MA (2010) Springback analysis of thin bent sheets on elastomeric. Int J Mater Form 3(1):1075–107810.1007/s12289-010-0957-z ↗
15. Peng LF, Lai XM, Li MZ (2005) Transition surface design for blank holder in multi-point forming. Int J Mach Tools Manuf 46(12–13):1336–1342
16. Zhang Q, Fan SQ, Zhao SD, Wang CH (2010) Numerical simulation research on a new spinning process: double-roller clamping spinning process. Int J Mater Form 3(1):121–12510.1007/s12289-010-0722-3 ↗
17. Behnam D, Behrooz ZD (2014) Assessment of forming parameters influencing spring-back in multi-point forming process: a comprehensive experimental and numerical study. Mater Des 59:103–11410.1016/j.matdes.2014.02.043 ↗
18. Liu W, Chen YZ, Xu YC, Yuan SJ (2016) Evaluation on dimpling and geometrical profile of curved surface shell by hydroforming with reconfigurable multipoint tool. Int J Adv Manuf Technol 86(5):2175–218510.1007/s00170-015-8264-y ↗
19. Cai ZY, Wang SH, Xu XD, Li MZ (2009) Numerical simulation for the multi-point stretch forming process of sheet metal. J Mater Process Technol 209(1):396–40710.1016/j.jmatprotec.2008.02.010 ↗