Process for forming a high temperature single crystal canted spring

Patent metadata

Field	Value
Publication number	US-9541148-B1
Application number	US-201313968000-A
Country	US
Kind code	B1
Filing date	Aug 15, 2013
Priority date	Aug 29, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A process for forming a high temperature single crystal canted spring is provided. In one embodiment, the process includes fabricating configurations of a rapid prototype spring to fabricate a sacrificial mold pattern to create a ceramic mold and casting a canted coiled spring to form at least one canted coil spring configuration based on the ceramic mold. The high temperature single crystal canted spring is formed from a nickel-based alloy containing rhenium using the at least one coil spring configuration.

First claim

The invention claimed is:

1. A process for forming at least one high temperature single crystal canted coil spring, comprising:
determining at least one canted coil spring configuration and canted coil spring design parameters, wherein the single crystal canted coil spring has a length and made up of a plurality of individual spring coils;
fabricating a sacrificial mold pattern from the determined configuration and design parameters of the at least one canted coil spring;
incorporating within the sacrificial mold pattern at least one support structure running the length of the single crystal canted coil spring and gating connectors along each of the plurality of individual spring coils to prevent collapse during mold fabrication and to provide supply paths for molten metal alloy to uniformly flow to form each one of the plurality of individual spring coils;
creating a ceramic mold from the sacrificial mold pattern following the incorporating step;
using the ceramic mold, casting at least one single crystal canted coil spring from the molten metal alloy, wherein the molten metal alloy is a nickel-based alloy containing rhenium.

2. The process of claim 1 , further comprising: removing the at least one support structure from the at least one canted coil spring configuration to produce the at least one high temperature single crystal canted coil spring.

3. The process of claim 2 , further comprising: forming residual support posts or stubs when the at least one support structure is removed, wherein the residual support posts or stubs prevent the at least one single crystal canted coil spring from rotating.

4. The process of claim 1 , wherein creating the ceramic mold is based on configurations of a rapid prototype spring.

5. The process of claim 1 , wherein the at least one single crystal canted coil spring is configured to maintain resiliency in applications wherein the temperature is in excess of 2,200° F.

6. The process of claim 1 , wherein the at least one single crystal canted coil spring is configured to maintain resiliency in applications wherein the temperature is in excess of 2,000° F.

7. The process of claim 1 , wherein the at least one single crystal canted coil spring is configured to maintain resiliency in applications wherein the temperature is in excess of 1,800° F.

Assignees

• Nasa
• The Us Administrator Of Nat Aeronautics And Space Administration

Inventors

• Demange Jeffrey J
• Ritzert Frank J
• Nathal Michael V
• Dunlap Patrick H
• Steinetz Bruce M

Classifications

• Y10T29/49611

  for vehicle or clutch · CPC title

• F16F1/00 Primary

  Springs (working with fluid F16F5/00, F16F9/00) · CPC title

• Y10T29/49609

  Spring making · CPC title

• B22C7/02

  Lost patterns · CPC title

• B29C39/02

  for making articles of definite length, i.e. discrete articles · CPC title