Influence of Preformed Shapes on Thickness Distribution of Double-pass Incremental Forming
Abstract
In order to study the influence of preformed shapes on the thickness distribution of double-pass incremental forming, based on the double-pass incremental forming of straight-wall part, three double-pass strategies with arc and straight line profile preformed shapes were designed. A finite element method (FEM) model of double-pass incremental forming was then established and experimentally verified. It is found that the double-pass strategy with a curved profile of curvature radius of 80 mm is expected to achieve less thickness reduction,equivalent plastic strain and larger minimum thickness. Additionally, the increased plastic deformation region does not always lead to larger thickness,and the final thickness is mostly related to the actual deformation area during the second pass that depends on the specific design of the preformed shape. Finally, a linear relationship between the curvature radius of the preformed shape and the final thickness distribution is not observed. When the tangential angle(θ) is around 40°,it has the most uniform thickness distribution.
Keywords: double-pass incremental forming, preformed shape, formability, thickness
Full Text:
PDFReferences
ZHOU L R, MO J H. XIAO X Z. Research on numerical control incremental forming process of sheet metal part J j. Journal of Plasticity Engineering. 2003. 10 ( 4 ) : 27 - 29. ( In Chinese)
MO J H. CHEN Z D. Numerical control incremental forming technology of sheet meta [J]. Aviation Manufacturing Technology .2002.12:25 - 28. (In Chinese)
FI LICE L. FRATINI L. MICARI F. Analysis of material formability in incremental forming [J]. Cirp Annals-Manufac-turing Technology, 2002.151(1); 199 - 202.
KIM T J. YANG D Y. Improvement of formability for the incremental sheet metal forming process [J]. International Journal of Mechanical Sciences.2000,42(7) ; 1271 -1286.
YOUNG D. JESWIET J . Wall thickness variations in singlepoint incremental forming[J]. Proceedings of the Institution of Mechanical Engineers Part  Journal of Engineering Manufacture .2004.218(11);1453- 1459.
LI J B. YANG F F. ZHOU Z Q. Thickness distribution of multi-stage incremental forming with different forming stages and angle intervals Jj. Journal of Central South University of Technology. 2015 .22(3) ;842-848.
LIU Z B, LI Y L, PAUL A, et al. Tool path strategies and deformation analysis in multi-pass incremental sheet forming process [J]. International Journal of Advanced Manufacturing Technology ,2014,75(1/4) :395- 409.
MALHOTRA R, BHATTACHARYA A, KUMMAR A, et al. A new methodology for multi-pass single point incremental forming with ixed toolpaths [J]. Cirp Annals Manufacturing Technology ,2014, 60(1) :323 - 326.
HIRT G, AMES J, BAMBACH M. Forming strategies and process modelling for CNC incremental sheet forming[J]. Cirp Annals-Manufacturing Technology, 2004,53 (1) :203 - 206.
JACKSON K, ALLWOOD J. The mechanics of incremental sheet forming [J ]. Journal of Materials Processing Technology. 2009,209 (3): 1158- 1174.
KIM T J, YANG D Y. Improvement of formability for the incremental sheet metal forming process [j]. International Journal of Mechanical Sciences,2002,42 (7): 1271 - 1286.
ISEKI H, NAGANAWA T. Vertical wall surface forming of rectangular shell using multi-stage incremental forming with spherical and cylindrical rollers[JJ. Journal of Materials Processing Technology, 2002,130131 (02) : 675 - 679.
Refbacks
- There are currently no refbacks.
