multistep two point incremental forming

 

 

CAO Jiang1, WANG Qiucheng1, QIU Lei2, LI Ning1, WEI Ruihui1

 

(1. School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;

 

2. Hangzhou Boleng SciTech Ltd Company, Hangzhou 310019, China)

 

 

Abstract: Aiming at investigate material deformation during mutistep two point incremental forming of sheet metal,a FEM model of two point incremental was established. The spiral toolpath was applied to a typical conical part of mutistep forming,node coordinate value,element strain and thickness date were extracted from simulated results,and the effects of the multistep on node flow, element strain and wall thickness were analyzed. In order to verify simulation results,the circular grid analysis and smearmark method were utilized to measure the material deformation of mutistep two point incremental forming experiment,the experiment results have a good agreement with stimulation results. The results indicate that a significant radial direction flow is observed during multistep two point incremental forming,and the material flow further by adding more forming steps,and the more forming steps,the more uniform thickness of sample is discovered. In addition, the thickness distribution of mutistep two point incremental forming parts can be improved by variable interval angle design approach,the more uniform thickness of parts can be obtained by adding more steps.

 

Key words: two point incremental forming (TPIF); conical part ; multistep; forming angle; wall thickness