| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Investigation of Failure Mechanisms of Cemented Carbide Fine Blanking Punches by Means of Process Forces and Acoustic Emission |
| Author(s) |
Herman Voigts, Rafael Hild, Andreas Feuerhack, Thomas Bergs |
| On-Site Speaker (Planned) |
Herman Voigts |
| Abstract Scope |
Due to the processing of materials with ever greater strength in fine blanking, the lifetime of conventional high-speed steel punches decrease rapidly. Materials with a higher wear resistance and compressive strength, such as cemented carbide, are investigated for the use in fine blanking processes. However, cemented carbide punches of-ten fracture during the stripping off phase due to the combined tensile and flexural stress collective. The under-standing of fracture mechanisms and subsequent fracture prevention supports the application of cemented car-bides. The fracture mechanisms during stripping off are mostly unknown. The objective is to identify fracture mechanisms of cemented carbide punches. The fracture of cemented carbide punches was metrologically moni-tored by means of acoustic emission (AE) and process forces. The fracture pattern was analyzed related to the measured signals. In order to interpret the AE-signal, basic process analyses were performed. Subsequently, a punch fracture of cemented carbide was provoked with the high-strength material S700MC. Cemented carbide punches tend to fracture during stripping off as a cause of tensile and flexural loads due to asymmetrical interactions with the scrap web. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |