Tribological optimized cutter tool for milling titanium or titanium alloys
AssigneeLockheed Martin Corporation
InventorThomas C. Stinnett
Life of this patent
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Abstract
A coating comprising a bottom layer comprising a hard physical vapor deposition (PVD) coating applied to the end mill. The bottom layer has an edge-prep and polished top surface with reoriented cutting forces. The coating includes a top layer comprising a friction reducing coating applied to the top surface of the bottom layer to prevent or minimize titanium or titanium alloy adhesion to the end mill during milling operations of a metal object comprising the titanium or titanium alloy. The coating has a chemical composition which has inertness toward titanium or titanium alloy. A cutter tool and method are also provided.
Claims22
A method comprising:
- applying to an end mill an abrasion-resistant bottom coating (ARBC) layer on an outer perimeter surface of the end mill, the ARBC layer has chemical inertness toward titanium or titanium alloy;
- edge-prepping and polishing a top surface of the ARBC layer to form a polished ARBC layer with reoriented cutting forces, wherein the edge-prepping at least partially comprises altering one or more portions of one or more cutting edges of the end mill to a generally rounded configuration;
- and
- applying a friction reducing coating (FRC) layer to the top surface of the polished ARBC layer to form a thin-film coating which has chemical inertness to the titanium or the titanium alloy.
A cutter tool comprising:
- an end mill having an altered secondary relief with a standard style relief;
- and a duplex coating applied to the end mill having a bottom layer comprising an abrasion-resistant bottom coating (ARBC) wherein the bottom layer has an edge-prep and polished top surface, wherein the edge-prep at least partially comprises an alteration of one or more portions of one or more cutting edges of the end mill to a generally rounded configuration;
- and
- a top layer comprising a friction reducing coating applied to the top surface of the bottom layer, the duplex coating includes a chemical composition which is inert toward titanium or titanium alloy to prevent or minimize titanium or titanium alloy adhesion to the end mill during milling operations of a metal object comprising the titanium or titanium alloy.
A coating comprising:
- a bottom layer comprising a hard physical vapor deposition (PVD) coating applied to an end mill wherein the bottom layer has an edge-prep and polished top surface to reorient cutting forces, wherein the edge-prep at least partially comprises an alteration of one or more portions of one or more cutting edges of the end mill to a generally rounded configuration;
- and
- a top layer comprising a friction reducing coating applied to the top surface of the bottom layer, both the bottom layer and the top layer having a chemical composition which has inertness toward titanium or titanium alloy to prevent or minimize titanium or titanium alloy adhesion to the end mill during milling operations of a metal object comprising the titanium or titanium alloy.
Dependencies are inferred from the claim text.