| Symptom on screen | What's actually happening | The fix (not guesswork) | |------------------|--------------------------|--------------------------| | | Too much stretch, too fast | 1. Increase drawbead height? No! Reduce bead force. 2. Increase blankholder force gradually. | | Crack on sidewall | Material is sticking | 1. Add lubrication (increase friction to 0.15). 2. Increase die radius (R>5x thickness). | | Wrinkle in flange | No tension | 1. Increase drawbead lock. 2. Move blankholder closer. | | Wrinkle in panel center | Too much loose metal | 1. Increase blankholder force. 2. Add a step bead. | | Springback (ends up) | Elastic recovery won | 1. Overform (negative springback compensation). 2. Add restrike station. |
There are several benefits to using Autoform: autoform manual