Effect of generatrix profile on single-point incremental forming parameters
- 122 Downloads
The single-point incremental forming is one of two modes of the incremental sheet forming process. It is the most used in the manufacture of parts for small series and prototypes in various sectors such as aeronautics, biomedical field, and art pieces. In this work, two geometries of parts are investigated at the same process parameters (rotation speed, feed rate, step increment, sheet thickness, and tool diameter). The experimental tests are made with a CNC spinner milling machine. The blank sheet of mild steel is formed by means of a hemispherical tool with a 10-mm diameter. The forming tool follows the desired spiral path that is determined by a CAD model. The main objective of this paper is to study the effects of the generatrix profile for two shapes of a truncated cone (straight and circular generatrix) on forming forces, thickness distribution, shape accuracy, and surface roughness of the formed shape. Besides, a coefficient of shape is introduced from experimental and analytical vertical forces. The experimental results show that a better roughness surface quality is obtained in forming a straight generatrix and that a more uniform thickness distribution of the blank is obtained after thinning and shaping a circular generatrix. In order to examine the geometric accuracy of the parts, a Next Engine 3D scanner is used to rebuild the developed surfaces again and to make a comparison between the programmed and scanned profiles.
KeywordsSingle-point incremental forming Generatrix 3D scanning Thickness Shape accuracy Roughness
Unable to display preview. Download preview PDF.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 1.Leszak E (1967) Apparatus and process for incremental dieless forming. United States Patent Office US3342051Google Scholar
- 4.Saidi B, Boulila A, Ayadi M, Nasri R (2015) Experimental force measurements in single point incremental sheet forming SPIF. Mech Ind. doi: 10.1051/meca/2015018
- 5.Benmessaoud R (2014) A tool path generation method for the multi-pass incremental forming process investigation. Int J Adv Res Comp Sci Softw Eng 4(5):1035–1044Google Scholar
- 6.Nicolas D (2009) Formage incrémental de tole d'aluminium: étude du procédé à l'aide de la mesure de champs et identication de modèles de comportement.PhD. thesis, Toulouse-III-Paul-Sabatier University, FranceGoogle Scholar
- 8.Xu Z, Gao L, Hussain G, Cui Z (2010) The performance of flat end and hemispherical end tools in single-point incremental forming. Int J Adv Manuf Technol 46(9):1113–1118Google Scholar
- 17.Ambrogio G, Duflou J, Filice L, Aerens R (2007) Some considerations on force trends in incremental forming of different materials. 10th ESAFORM Conference on material forming ( HYPERLINK “http://AIP.Scitation.Org/journal/apc” AIP Conference proceedings ), American Institute of Physics
- 19.Petek A, Kuzman K, Kopaè J (2009) Deformations and forces analysis of single point incremental sheet metal forming. Arch Mater Sci Eng 35:107–116Google Scholar
- 23.Bagudanch I, Centeno G, Vallellano C, Garcia-Romeu ML (2013) Forming force in Single Point Incremental Forming under different bending conditions. MESIC The Manufacturing Engineering Society International Conference. Elsevier Ltdp. 354–360Google Scholar
- 24.Junk S, Hirt G, Bambach M, Chouvalova I, Ames J. (2003). Flexible CNC flexible CNC incremental sheet forming: process evaluation and simulation. Conferência Nacional de Conformação de Chapas, 15, Outubro Porto Alegre/RS, Brasil, ed. Schaeffer L, Gráfica e Editora Brasul Ltda p. 30-38.Google Scholar
- 25.Thakur R, Kumar N (2015) Optimization of surface roughness and improving profile accuracy in SPIF (single point incremental forming) process. Inter J Curr Eng Technol 5:2048–2052Google Scholar
- 28.Blaga A, Oleksik V (2013) A study on the influence of the forming strategy on the main strains, thickness reduction, and forces in a single point incremental forming process. Adv Mater Sci Eng. doi: 10.1155/2013/382635
- 29.Alves ML, Silva MB, Alves LM, Martins PAF (2009) On the formability, geometrical accuracy and surface quality of sheet metal parts produced by SPIF.Proc. SPIE 7375ICEM 2008: International Conference on Experimental MechanicsGoogle Scholar
- 33.Cavaler LCC, Schaeffer L, Rocha AS, PERUCH F (2010) Surface roughness in the incremental forming of AISI 304L stainless steel sheets. Far East J Mech Eng Phys 1:87–98Google Scholar
- 34.Arshad S (2012) A study of forming parameters, forming limits and part accuracy of aluminium 2024, 6061 and 7475 alloys. PhD. thesis, KTH Royal Institute of technology Stockholm, SwedenGoogle Scholar