Springback Investigation on Sheet Metal Incremental Formed Parts

Incremental forming is a complex forming process with continuously local cumulative deformation taking place during its process, and springback that forming quality affected by would occur. The springback evaluation method based on forming error compensation also was proposed, which it can be defined as the difference between theory and the actual amount of compensation along the measured direction. According to forming error compensation evaluation method, experiments was designed and implemented. And from the results that obtained it can be show, the magnitude of springback average (δE) of formed parts was very small, and the forming precision could be significantly improved by adopting compensation method. Based on double tensile stress state in the main deformation area, a hypothesis that there is little springback be arisen by bending behavior on the formed parts that was proposed.

Authors:

• Hongyu Wei
• Wenliang Chen
• Lin Gao

Keywords:

• Sheet metal
• incremental forming
• springback
• forming error compensation
• geometric accuracy

References:

[1] Mo Jianhua, Han Fei. State of the parts and latest research on incremental
sheet NC forming technology [J]. China Mechanical Engineering. 2008,
19(4):491-497.
[2] J.R. Duflou, B.Lauwers, J.Verbert. Study on the achievable accuracy in
single point incremental forming. Advanced Method in Material
Forming, 2007, 252-262.
[3] G.Ambrogioa, I.Costantino, L.Filice.etc. Influence of some relevant
process parameters on the dimensional accuracy in incremental forming:
a numerical and experimental investigation. Journal of Materials
Processing Technology,2004,153:501-507.
[4] Gan Wenxing, Mo Jianhua. Investigation on springback of sheet metal
numerical control incremental forming[J]. Mechanical Science and
Technology, 2004,23(6):739-741.
[5] Wei Hongyu et al. Investigation on residual stress of revolving type sheet
metal incremental formed parts. Chinese Journal of Mechanical
Engineering. 2010, 46(9) : 193-198 .
[6] H.Y.Wei, L.Gao, S.G.Li. Investigation on thickness distribution of bulge
type incrementally formed sheet metal part with irregular shape, Journal
of ShanDong University (Engineering Science). 2009, 43(6):82-87.