Characterization of shape and dimensional accuracy of incrementally formed titanium sheet parts

Amar Kumar Behera, Bin Lu, Hengan Ou*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)
14 Downloads (Pure)

Abstract

Single Point Incremental Forming (SPIF) is a relatively new process that has been recently used to manufacture medical grade titanium sheets for implant devices. However, one limitation of the SPIF process may be characterized by dimensional inaccuracies of the final part as compared with the original designed part model. Elimination of these inaccuracies is critical to forming medical implants to meet required tolerances. In this study, a set of basic geometric shapes were formed using SPIF to characterize the dimensional inaccuracies of grade 1 titanium sheet parts. Response surface functions are then generated to model the deviations at individual vertices of the STL model of the part as a function of geometric shape parameters such as curvature, depth, wall angle, etc. The generated response functions are further used to predict dimensional deviations in a specific clinical implant case. The predicted deviations show a reasonable match with the actual formed shape and are used to generate optimized tool paths for minimized shape and dimensional inaccuracy. Further, an implant part is then made using the accuracy characterization functions for improved accuracy. The results show an improvement in shape and dimensional accuracy of incrementally formed titanium medical implants.

Original languageEnglish
Title of host publication4th International Conference on New Forming Technology, ICNFT 2015
PublisherEDP Sciences
Number of pages7
Volume21
ISBN (Electronic)9782759818235
DOIs
Publication statusPublished - 10 Aug 2015
Externally publishedYes
Event4th International Conference on New Forming Technology, ICNFT 2015 - Glasgow, United Kingdom
Duration: 06 Aug 201509 Aug 2015

Conference

Conference4th International Conference on New Forming Technology, ICNFT 2015
CountryUnited Kingdom
CityGlasgow
Period06/08/201509/08/2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Engineering(all)
  • Materials Science(all)

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  • Cite this

    Behera, A. K., Lu, B., & Ou, H. (2015). Characterization of shape and dimensional accuracy of incrementally formed titanium sheet parts. In 4th International Conference on New Forming Technology, ICNFT 2015 (Vol. 21). [04014] EDP Sciences. https://doi.org/10.1051/matecconf/20152104014