Refractory metal core finishing technique

Patent metadata

Field	Value
Publication number	US-11529674-B2
Application number	US-202016808529-A
Country	US
Kind code	B2
Filing date	Mar 4, 2020
Priority date	Nov 11, 2013
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A refractory metal core (RMC) finishing method according to an exemplary aspect of the present disclosure includes, among other things, performing a plurality of finishing operations on a plurality of RMC samples, analyzing one or more properties of at least a portion of the plurality of RMC samples and selecting a combination of finishing operations for generating an RMC having desirable properties for manufacturing a part free from defects.

First claim

What is claimed is:

1. A method, comprising:
measuring at least one property of a plurality of refractory metal core (RMC) samples;
splitting the plurality of RMC samples into a first portion and a second portion different from the first portion;
performing a first finishing operation on the first portion; and
performing a second finishing operation on the second portion;
wherein the measuring at least one property of the plurality of RMC samples includes measuring sharpness of break edges and a surface finish of the plurality of RMC samples.

2. The method as recited in claim 1 , comprising:
coating the plurality of RMC samples.

3. The method as recited in claim 1 , comprising:
performing at least one validation operation on the plurality of RMC samples.

4. The method as recited in claim 3 , wherein the at least one validation operation includes at least one of furnace testing and casting.

5. The method as recited in claim 1 , wherein the splitting the plurality of RMC samples into a first portion and a second portion different from the first portion includes splitting the plurality of RMC samples into a first portion, a second portion different from the first portion, and a third portion different from the first portion and the second portion.

6. The method as recited in claim 5 , the method comprising:
robotic machining the third portion.

7. The method as recited in claim 1 , wherein the first finishing operation includes a harperizing process performed for a first amount of time, and the second finishing operation includes a harperizing process performed for a second amount of time different from the first amount of time.

8. The method as recited in claim 7 , wherein the splitting the plurality of RMC samples into a first portion and a second portion different from the first portion includes splitting the plurality of RMC samples into a first portion, a second portion different from the first portion, and a third portion different from the first portion and the second portion.

9. The method as recited in claim 8 , the method comprising:
robotic machining the third portion to round break edges of the third portion.

10. The method as recited in claim 9 , comprising:
coating the plurality of RMC samples.

11. The method as recited in claim 10 , comprising:
performing at least one validation operation on the plurality of RMC samples.

12. The method as recited in claim 1 , wherein the first finishing operation is different from the second finishing operation.

13. The method as recited in claim 1 , wherein the splitting step is performed based on results from the measuring step.

14. The method as recited in claim 13 , wherein the first and second finishing operations are performed to provide the plurality of RMC samples for manufacturing a part that is free from at least one of alloying, spallation and recrystallization.

15. The method as recited in claim 1 , the method comprising:
robotic machining the second portion to round break edges of the second portion.

16. The method as recited in claim 15 , wherein the robotic machining comprises moving a tool with a robotic arm along surfaces of the second portion to round break edges, wherein the tool comprises a bristle.

17. The method as recited in claim 16 , wherein the robotic machining comprises sensing the amount of force applied by the tool against the surfaces.

18. The method as recited in claim 17 , where the splitting step is performed based on the measuring step, and the first and second finishing operations are performed to provide the plurality of RMC samples for manufacturing a part that is free from at least one of alloying, spallation and recrystallization.

19. The method as recited in claim 18 , wherein the first finishing operation is different from the second finishing operation.

20. The method as recited in claim 1 , wherein the splitting step is performed based on results from the first measuring step, the first finishing operation is performed for a first duration, the second finishing operation is performed for a second duration from the first duration, and the first and second finishing operations are performed to provide the plurality of RMC samples for manufacturing a part that is free from at least one of alloying, spallation and recrystallization.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Cassells Dewight R
• Barron Alan C
• Rizzo John P
• Reed Gordon Miller
• Propheter-Hinckley Tracy A

Classifications

• B22C9/24

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• Y02T50/60

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• G01B11/303

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• F05D2220/32

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• G01N19/04

  Measuring adhesive force between materials, e.g. of sealing tape, of coating · CPC title