Tool wear and life-span variation in cold forming operations: A review of a critical property for microforming
2016 (English)In: Journal of Manufacturing Processes, ISSN 1526-6125Article in journal (Other academic) Submitted
In cold forging the common failures can be seen as 1) Over stressing the tool, 2) Abrasive wear failure leading to flawed tolerances of the work piece and poor surfaces, 3) Galling leading to poor surface of the work piece and material buildup and wear of the tool, and 4) Fatigue failure. In the current work the modeling and variation of tool life were reviewed as these have special importance to the viability of microforming. The material properties of tool materials are more or less anisotropic and tool life sensitivity to the anisotropy is depending on both the as received and in service condition. It is clearly important to manage the preconditioning of the tool surface, through an appropriate manufacturing process and residual stress level management. If this is made correctly it seems to be possible to eliminate the effects from surface particles. Under high stress low-cycle fatigue conditions fatigue failure form internal microstructures and inclusions are common. To improve abrasive wear resistance larger carbides are commonly the solution which will have a negative impact on tooling life as these tends to be the root cause of fatigue failures.
Place, publisher, year, edition, pages
wear, tool, die, life-span, cold, forming, microforming
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:hj:diva-29757Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-29757DiVA: diva2:918200