Distortion mitigation in directed energy deposition
AssigneeNorsk Titanium AS
InventorPedro Almeida
Life of this patent
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Abstract
Provided are a curved clamping mold and systems and methods using the curved clamping mold for manufacturing objects, especially titanium and titanium alloy objects, by directed energy deposition. The methods include thermally pre-bending the substrate onto which the object is to be manufactured to form a pre-bent substrate, attaching the pre-bent substrate to a jig using the curved clamping mold as an underlying support, pre-heating the substrate, and forming the object on the pre-heated, pre-bent substrate using a directed energy deposition technique.
Claims20
A directed energy deposition method for producing a metal workpiece, the method comprising:
- providing a curved clamping mold, the curved clamping mold comprising:
- a first side comprising two or more cavities separated by a stiffening member and a rim having a flat surface around a perimeter of the first side;
- a second side opposite of the first side, the second side having a curved surface and comprising knurls or corrugations on the second side;
- and
- a ceramic coating;
- providing a pre-bent substrate;
- supporting the pre-bent substrate on the curved clamping mold;
- and
- forming the metal workpiece on a surface of the pre-bent substrate opposite the curved clamping mold.
A directed energy deposition method for producing a metal workpiece, the method comprising:
- providing a pre-bent substrate;
- providing a curved clamping mold;
- supporting the pre-bent substrate on the curved clamping mold;
- securing the pre-bent substrate and the curved clamping mold to a jig;
- and
- forming the metal workpiece on a surface of the substrate by an additive manufacturing process that comprises melting a metal feedstock to deposit a layer of molten metal on the surface of the substrate to form a base material and deposits subsequent layers of molten metal on the base material to form the metal workpiece.
Dependencies are inferred from the claim text.