Abstract
Combined with the Explicit/Implicit finite element(FE) simulations and experiments, the springback phenomenon of large-diameter 316L stainless steel tube with Φ123 mm × 3.97 mm× 350 mm (tube diameter × thickness × bending radius) under Numerical Control (NC) Bending is investigated. The dynamic three-dimensional digital speckle strain measurement method and uniaxial tensile tests are used to obtain the mechanical properties of the 316L tube with large strain. The twist-compression test is performed to estimate the friction between 316L tube and die under different pressure, rotation speed and lubrication conditions. Under ABAQUS platform, a 3D FE model is established to simulate the tube bending, ball retracting and unloading of 316L tube, which is validated by the experimental results. The results show that the maximum springback angle is 7.2°. The mandrel extension length(e), number of balls(n) and bending angle(θ) have significant effects on the amount of springback.
| Original language | English |
|---|---|
| Pages (from-to) | 49-54+60 |
| Journal | Cailiao Kexue yu Gongyi/Material Science and Technology |
| Volume | 20 |
| Issue number | 4 |
| State | Published - Aug 2012 |
Keywords
- 316L stainless steel tube
- Large diameter
- NC bending
- Springback