Modeling Thread Milling Forces in Mini-hole in Dental Metallic Materials

Anna Carla Araujo (1) , Guillaume Fromentin (2)

1 UFRJ - Universidade Federal do Rio de Janeiro [Brasil] = Federal University of Rio de Janeiro [Brazil] = Université fédérale de Rio de Janeiro [Brésil]
2 LABOMAP - Laboratoire Bourguignon des Matériaux et Procédés

Abstract Thread milling processes produces lower forces and residual stresses if compared to thread cutting by turning, as the cutting area is lower because the feed rate is not dependent to the cutting speed. In industry, internal threads on the abutments for metallic dental implant are usually produced by turning, although thread milling could be an alternative choice. In this article, thread milling is used to manufacture internal threads in two metallic dental materials: Titanium alloy and Cr-Co alloys, using the {M2} thread geometry typical of those elements. Commercial tool is used and the relation with machined geometry is analyzed. It is concluded that the small tool diameter/internal diameter ratio impacts on the reduced steady state region compared with the region affected by penetration. The specific cutting forces were found similar in both materials using two feed rates, for three initial depth of cut and same cutting speed and identical thread geometry, considering the maximum value per revolution.

Mots clés: Thread milling; Cutting force; Dental implants; Titanium alloy; Cr-Co alloy

Domaines: Génie mécanique [physics.class-ph]

Anna Carla Araujo, Guillaume Fromentin. Modeling Thread Milling Forces in Mini-hole in Dental Metallic Materials. 16th CIRP Conference on Modelling of Machining Operations, Jun 2017, Cluny, France. pp.623-628, ⟨10.1016/j.procir.2017.03.228⟩. ⟨hal-02060646⟩