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Superplastically Continuous Roll Forming Titanium

a superplastic, continuous technology, applied in metal rolling arrangements, manufacturing tools, shaping tools, etc., can solve the problem of limited press size in the prior art process of spf employing dies, and achieve the effect of reducing overall cycle time and alpha case build up, and reducing costs

Inactive Publication Date: 2010-03-04
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a method for making titanium structures using a process called superplastic continuous roll forming. This method can reduce the time and cost associated with making titanium structures by reducing alpha case build up and increasing efficiency. The method involves heating the titanium blank with a current to make it suitable for superplastic forming, and then using continuous roll forming to create the desired shape. This process can be used to create various titanium parts with improved efficiency and reduced costs.

Problems solved by technology

For example, it is known that prior art processes for SPF employing dies is limited to press size, a long heat up and cool down SPF cycle, thermal degradation of tools, and requirement for shielding gases to prevent alpha case build up or post SPF chemical process to remove alpha case.

Method used

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  • Superplastically Continuous Roll Forming Titanium
  • Superplastically Continuous Roll Forming Titanium
  • Superplastically Continuous Roll Forming Titanium

Examples

Experimental program
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Effect test

first embodiment

[0019]Referring to FIGS. 2 and 3a, a process of forming a desired shape into blank 12 by system 10 is described. Stationary rolling members 16 may move blank 12 such that blank 12 is in superimposition with first rolling members 18a. At first station 14a, first rolling members 18a may contact blank 12 on surface 13 thereof with a force F such that first rolling members 18a remain in contact with blank 12 to facilitate first rolling members 18a transferring a current to blank 12. In an example, force F may have a magnitude of up to several hundred pounds. To that end, upon transferring the current to blank 12, a temperature of blank 12 may be increased such that blank 12 may comprise a temperature suitable for superplastic forming, and, more specifically, in a range of approximately 1650° F.-1750° F., shown at step 102. In a further embodiment, first rolling members 18a of first station 14a may contact any side of blank 12 in any configuration to facilitate transferring a current to ...

second embodiment

[0024]a process of forming a desired shape into blank 12 by system 10 is described below, comprising steps A-F.

[0025]Step A

[0026]Referring to FIGS. 4 and 6, rolling members 16 may move blank 12 such that a first portion 40 of blank 12 is in superimposition with first rolling members 18a of first stations 14a.

[0027]At first station 14a, first rolling members 18a may contact blank 12 on surface 13 thereof with the aforementioned force F such that first rolling members 18a remain in contact with blank 12 to facilitate first rolling members 18a transferring a current to first portion 40 of blank 12. To that end, upon transferring the current to first portion 40 of blank 12, a temperature of first portion 40 of blank 12 may be increased such that first portion 40 of blank 12 may comprise a temperature suitable for superplastic forming, and, more specifically, in a range of approximately 1650° F.-1750° F., shown at step 202.

[0028]Step B

[0029]Referring to FIGS. 4 and 7, after completing s...

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Abstract

A method of forming titanium structures, and more specifically, a method of superplastically continuous roll forming titanium structures are disclosed herein. In one embodiment, a method of forming a shape in an article comprising titanium, the method including, among other things, providing first and second rolling members, the first rolling members being conductive and the second rolling members being continuous roll shaping members; contacting the article with the first rolling members to transfer a current to the article to heat the article to a temperature suitable for superplastic forming; and with the article being in a superplastic state, contacting the article with the second rolling members to form the shape in the article.

Description

FIELD OF THE INVENTION[0001]The field of the present disclosure relates to a method of forming titanium structures, and more specifically, a method of superplastically continuous roll forming titanium structures.BACKGROUND OF THE INVENTION[0002]Superplastic forming (SPF) takes advantage of a material's superplasticity or ability to be strained past its rupture point under certain elevated temperature conditions and strain rates. Superplasticity in metals is defined by very high tensile elongations, ranging from two hundred to several thousand percent. SPF is a process that can be used to produce structures that takes advantage of the high elongation behavior of certain superplastic materials.[0003]SPF typically includes the steps of heating a sheet of material to a point in which superplastic deformation is possible, clamping the material within a sealed die and then using gas pressure to force the material to stretch and take the shape of a forming surface located in the die cavity...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B21B37/74B21B1/26C22F1/16
CPCB21D37/16B21D5/08
Inventor FISCHER, ALLENDODS, BRYAN G.
Owner THE BOEING CO