Study on the extrusion of nickel-based spark plug electrodes by numerical simulation
Abstract
Interest in metal forming simulation has grown rapidly during the last decades and is now well established even in industry. It provides a flexible and relatively cheap method to perform sensitivity analyses, getting a better insight into the forming process and use it as an optimisation tool. As far as wear is concerned, numerical simulation can be seen as a relevant approach to assess the thermomechanical loadings applied to the active die surface and therefore predict their wear behaviour. In this study, a Finite-Element (FE) based model has been developed in order to investigate the cold forming process of a nickel-based sparkplug electrode. A fully thermo-mechanically coupled implicit formulation has been used in order to model the forward extrusion step with a special emphasis on the contact conditions at the workpiece-die interface. Contact pressure, relative sliding velocity and temperature profiles have been extracted versus time and qualitatively compared to the wear phenomena observed on the worn production dies.
- Publication:
-
Proceedings of the 21st International ESAFORM Conference on Material Forming: ESAFORM 2018
- Pub Date:
- May 2018
- DOI:
- 10.1063/1.5034853
- Bibcode:
- 2018AIPC.1960c0010S