Accuracy of incremental ISF
- The accuracy is affected by spring back, the shape of the formed part, the shape and size of the tool, the forming toolpath, material and thickness of the blank
- Accuracies of between 1.5mm and 2 mm have been achieved [13]
- Researchers are investigating ways of improving the accuracy
- A methodology proposed [15] modifies the ideal path of the forming tool using the ideal and actual positions of points formed in an earlier increment obtained by using a 3D digitizing system, allowing the error to be reduced by approximately 70%
- Another method [11] inverts deviation from measurement made in a first component and applies it to the required shape to obtain a modified shape which gives an improvement in the accuracy
[11] Hirt G, Ames J, Bambach M and Kopp R. Forming strategies and Process modelling for CNC Incremental sheet forming. Annals of the CIRP, 53, 1, 2004, 203-206.
[13] Leach D, Green AJ and Bramley AN, Sheet production without dies or special punches. Metallurgia, 68, 2, 2001, pFT12.
[15] Ambrogio G, De Napoli , Filice L and Muzzupappa M. Improvement Geometrical Precision In Sheet Incremental Forming Processes. Proc. of ESDA04, 7th Biennial conf. on Engrg Systems Design and Analysis, July 19-22, 2004 Manchester, United Kingdom.
