CASTING CORE FOR TURBINE ENGINE COMPONENTS AND METHOD OF MAKING THE SAME
First Claim
1. A method of forming a core for use in casting a turbine engine component comprising:
- forming a normal resolution region of the core; and
forming a high resolution region of the core using a method effective to produce high resolution features.
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Accused Products
Abstract
A turbine engine component, such as a turbine blade or vane, with complex internal features can be cast using a core having a first region with normal resolution features and a second region with high resolution features. The core can be formed from a single structure. Alternatively, the first region can be defined by a first ceramic core piece, which can be formed by any conventional process, such as by injection molding or transfer molding. The second region can be defined by a second ceramic core piece formed separately by a method effective to produce high resolution features, such as tomo lithographic molding. The first core piece and the second core piece can be joined by interlocking engagement, such as by male and female dovetails. The high resolution features can be effective to produce high efficiency internal cooling features in the cast component.
53 Citations
23 Claims
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1. A method of forming a core for use in casting a turbine engine component comprising:
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forming a normal resolution region of the core; and forming a high resolution region of the core using a method effective to produce high resolution features. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of joining a multi-piece core for a cast airfoil comprising:
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forming a first ceramic core piece, the first core piece being shaped as an airfoil body portion and having one of a plurality of recesses and a plurality of protrusions, the first core piece including an engaging surface; separately forming a second ceramic core piece having a high resolution region, the second core piece having an engaging surface, the second core piece having an opposite one of a plurality of protrusions and a plurality of recess, the recesses and the protrusions of the first and second core pieces being configured for substantially interlocking engagement, the second core piece shaped as a trailing edge portion of an airfoil; and joining the first core piece and the second core piece such that each protrusion is received in a respective recess and such that the engaging surfaces abut, whereby a core assembly is formed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A casting core for a turbine engine component comprising:
a ceramic core body having a first region of normal resolution detail and a second region of high resolution detail. - View Dependent Claims (20, 21, 22, 23)
Specification