Single-grain approach to material specific dental grinding-force equations. (January 2019)

• Record Type: Journal Article
• Authors: Carreon, Adam H.; Funkenbusch, Paul D.
• Is Part Of: Journal of manufacturing processes. Volume 37(2019)
• Page Start: 281
• Page End: 291
• Publication Date: 2019-01
• Subjects: Friction -- Nanoscratch -- Nanoindentation -- High-speed grinding -- Ceramics -- Glass; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2018.11.027
• Languages: English
• ISSNs: 1526-6125

Abstract

Highlights: Results from a Box Behnken designed experiment showed that material properties, tool rotational velocity, feed rate, and depth of cut all had significant effects on both normal and tangential grinding forces. The pileup geometry of a specific material will affect the required grain penetration, calculated grain-material contact area, and bur loading during the grinding process. Material damage, represented by subsurface damage and energy dissipation, is an additional characteristic of brittle materials which affected the grinding process. First principles model based on these effects fits the experimental grinding-force data well. Abstract: In restorative dentistry, the use of machinable ceramics for patient tooth restoration has become common practice. In fact, more than 15 million dental procedures are performed each year that require the grinding of tooth enamel and dentin. This results in the need for machinable ceramics to properly restore the structure of a patient's tooth. This research uses quasi-static nanoindentation and nanoscratching to establish a semi-analytical material-specific high-speed abrasive grinding-force model for dental applications. The model includes a single fitting parameter and introduces a recently developed ploughing friction model to determine ploughing friction coefficients, grain penetrations, and grain-material contact areas. Additionally, the model demonstrates how material properties, and characteristics affect abrasive grinding. Procedural grinding-forces and trends for different process parameters and workpiece material properties are predicted for selected dental ceramics.