WO2010025327A1 - Formage superplastique par laminage continu de structures en titane - Google Patents

Formage superplastique par laminage continu de structures en titane Download PDF

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Publication number
WO2010025327A1
WO2010025327A1 PCT/US2009/055305 US2009055305W WO2010025327A1 WO 2010025327 A1 WO2010025327 A1 WO 2010025327A1 US 2009055305 W US2009055305 W US 2009055305W WO 2010025327 A1 WO2010025327 A1 WO 2010025327A1
Authority
WO
WIPO (PCT)
Prior art keywords
blank
rolling members
article
shape
forming
Prior art date
Application number
PCT/US2009/055305
Other languages
English (en)
Inventor
Allen Fischer
Bryan G Dods
Original Assignee
The Boeing Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Boeing Company filed Critical The Boeing Company
Publication of WO2010025327A1 publication Critical patent/WO2010025327A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling

Definitions

  • 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.
  • Superplastic forming 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.
  • 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. Controlling the gas pressure during the forming process controls the deformation rate of the material and maintains superplasticity at the elevated temperature.
  • the present invention is directed to a method of forming titanium structures employing superplastic continuous roll forming. Methods in accordance with the present invention may advantageously reduce overall cycle time and alpha case build up, and may reduce the costs associated with forming titanium structures, in comparison with the prior art.
  • a method in one embodiment, includes 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. Next, the method includes 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. Finally, with the article being in a superplastic state, contacting the article with the second rolling members to form the shape in the article.
  • a part prepared by a process to form titanium comprising the steps of, among other things, applying a current to a titanium blank to heat the blank to a temperature suitable for superplastic forming. With the article being in a superplastic state, continuous roll forming the blank to form a shape therein to define the part.
  • Fig. 1 is a simplified plan view of a system having a plurality of continuous rolling members to form a shape into a blank.
  • Fig. 2 is a flow chart showing a process of forming the shape in the blank using the system of Figure 1, in a first embodiment.
  • Figs. 3a-3e are plan views showing the blank being subjected to the process described in the first embodiment of Figure 2.
  • Figs. 4 and 5 are a flow chart showing a process of forming the shape in the blank using the system of Figs. 1 and 6-8, in a further embodiment.
  • Figs. 6-11 are plan views showing the blank being subjected to the process described in the further embodiment of Figures 4 and 5.
  • Blank 12 may comprise first and second opposed sides 13 and 15 having a side surface 17 extending therebetween. Blank 12 may have a thickness of a magnitude of 0.063 to 0.375 inches, a width of a magnitude of 1 to 48 inches, and a length of a magnitude of 20 feet. In a further embodiment, blank 12 may comprise a coil that may be unrolled such that the same may be processed by system 10. Blank 12 may comprise a material selected from a group of materials including titanium and titanium alloys.
  • blank 12 may have a volume resistivity such that the same may be a poor conductor of electricity, and as a result, when current is applied thereto, a temperature of blank 12 may be increased, described further below.
  • blank 12 may comprise a volume resistivity of approximately 80 micro ohm-cm.
  • System 10 comprises a plurality of stations 14 for forming a desired shape into blank 12, described further below. As shown, system 10 comprises three stations 14a, 14b, and 14c; however, system 10 may comprise any number of stations, depending upon the application desired and the shape desired to be formed into blank 12. To that end, each of stations 14 may facilitate forming a shape into blank 12 until a desired final shape of blank 12 is achieved. First and second stations 14b and 14c may form a first and a second shape into blank 12, respectively, such that upon processing blank 12 by system 10, a final desired shape is formed into blank 12, shown as formed blank 112. To move blank 12 through system 10 and to and from each station 14, system 10 comprises a plurality of rolling members 16 that may be in contact with second side 15 of blank 12. The number of stationary rolling members 16 may depend on the number of stations 14 and the length of blank 12.
  • System 10 further comprises a plurality of first and second rolling members 18 and 20 positioned at stations 14.
  • First rolling members 18 may be in electrical communication with a power source 22 such that first rolling members 18 may be conductive.
  • power source 22 may operate at 5 volts delivering 1500 amperes with a currently density of 3000 amperes per square inch for blank 12.
  • First rolling members 18 may transfer a current to blank 12 to heat blank 12, described further below.
  • Second rolling members 20 may be in mechanical communication with a motor 24 such that each of second rolling members 20 may rotate in a desired motion such that when in contact with blank 12, second rolling members 20 may form a desired shape into blank 12, described further below. Further, second rolling members 20 may be substantially non- conductive or may be electrically isolated from the rest of system 10. For simplicity of illustration, each of second rolling members 20 may be in mechanical communication with differing motors 24; however, each of second rolling members 20 may be in mechanical communication with the same motor 24.
  • First station 14a may comprise first rolling members 18a
  • second station 14b may comprise first and second rolling members 18b and 20b
  • third station 14c may comprise second rolling members 20c.
  • system 10 forms a desired shape into blank 12 by moving blank 12 through system 10 and in superimposition with each of stations 14a, 14b, and 14c via mechanical rollers 16.
  • Blank 12 may be continuously moved through system 10 such that blank 12 may be in superimposition with each of stations 14 successively, i.e. in order of first station 14a, second station 14b, and third station 14c.
  • an entirety of blank 12 may be exposed to only one station of stations 14 at a time.
  • Stationary rolling members 16 may move blank 12 such that blank 12 is in superimposition with first rolling members 18a.
  • 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.
  • force F may have a magnitude of up to several hundred pounds.
  • 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 0 F, shown at step 102.
  • first rolling members 18a of first station 14a may contact any side of blank 12 in any configuration to facilitate transferring a current to blank 12.
  • blank 12 may comprise the temperature suitable for superplastic forming in an area approximately 4 to 48 inches in length across blank 12.
  • rolling members 16 may move blank 12 such that blank 12 may be in superimposition with second rolling members 20b of second station 14b.
  • second rolling members 20b may contact blank 12 to form a first shape thereinto, shown as step 104.
  • second rolling members 20b contact first side 13 of blank 12; however, in a further embodiment, second rolling members 20b may contact blank 12 in any configuration (including any combination of first side 13, second side 15, and side surface 17) to form any desired shape into blank 12 at second station 14b.
  • second rolling members 20b may have a temperature associated therewith that is less than the temperature associated with blank 12. In an example, the temperature of second rolling members 20 may have a magnitude in a range of approximately 200 0 F up to 1750 0 F for continuous rolling.
  • first and second rolling members 18b and 20b may contact blank 12 concurrently, and in still a further embodiment, first rolling members 18b may contact blank 12 prior to second rolling members 20b contacting blank 12.
  • rolling members 16 may move blank 12 such that blank 12 may be in superimposition with third station 14c.
  • second rolling members 20c may contact blank 12 to form a second shape thereinto, shown as step 108.
  • the first shape of blank 12 formed at station 14b mentioned above, may be transformed into the second shape at station 14c.
  • the process of forming the second shape into blank 12 at third station 14c may be substantially the same as described above with respect to second rolling members 20b of second station 14b forming the first shape into blank 12.
  • second rolling members 20c contact first and second sides 13 and 15 of blank 12; however, in a further embodiment, second rolling members 20c of third station 14c may contact blank 12 in any configuration (including any combination of first side 13, second side 15, and side surface 17) to form any desired shape into blank 12 at third station 14c. Also analogous to that of second rolling members 20b, second rolling members 20c may have a temperature associated therewith that is less than the temperature associated with blank 12. To that end, system 10 has formed a final desired shape into blank 12, shown as formed blank 112 in Fig. 3e.
  • first rollers 18a and 18b of first and second stations 14a and 14b, respectively may contact any side of blank 12 in any configuration to facilitate transferring a current to blank 12.
  • second rollers 20b and 20c of second and third stations 14b and 14c, respectively may contact blank 12 in any configuration (including any combination of first side 13, second side 15, and side surface 17) to form any desired shape into blank 12.
  • first and second rolling members 18 and 20 may have a temperature associated therewith that is less than the temperature associated with a portion of blank 12 that is in a superplastic state.
  • blank 12 is shown having multiple discrete portions.
  • blank 12 may be a single continuous sheet.
  • a second embodiment of a process of forming a desired shape into blank 12 by system 10 is described below, comprising steps A - F.
  • 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.
  • 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.
  • 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 0 F, shown at step 202.
  • rolling members 16 may move blank 12 such that first portion 40 of blank 12 is in superimposition with second rolling members 20b of second station 14b and a second portion 42 of blank 12 is in superimposition with first rolling members 18a of first station 14a.
  • second rolling members 20b may contact first portion 40 of blank 12 to form a first shape thereinto, shown at step 204.
  • first rolling members 18a may contact second portion 42 of blank 12 on surface 15 thereof with the aforementioned force F such that first rolling members 18a remain in contact with second portion 42 of blank 12 to facilitate first rolling members 18a transferring a current to second portion 42 of blank 12.
  • a temperature of second portion 42 of blank 12 may be increased such that second portion 42 of blank 12 may comprise a temperature suitable for superplastic forming, and, more specifically, in a range of approximately 1650° F — 1750 0 F, shown at step 204.
  • rolling members 16 may move blank 12 such that first and second portions 42 of blank 12 may be in superimposition with second rolling members 20b and first rolling members 18a, respectively, of second station 14b and a third portion 44 of blank 12 may be in superimposition with first rolling members 18a of first station 14a.
  • first rolling members 18b may contact first portion 40 of blank 12 to transfer the current to blank 12 to heat first portion 40 of blank 12 to a temperature such that first portion 40 of blank 12 may be in a superplastic state, shown at step 206. This process is substantially the same as described above with respect to first rolling members 18a.
  • second rolling members 20b may contact second portion 42 of blank 12 to form a second shape thereinto, shown at step 206.
  • first rolling members 18a may contact blank 12 on surface 13 thereof with a force Fi such that first rolling members 18a remain in contact with blank 12 to facilitate first rolling members 18a transferring a current to third portion 44 of blank 12.
  • a temperature of third portion 44 of blank 12 may be increased such that third portion 44 of blank 12 may comprise a temperature suitable for superplastic forming, and, more specifically, in a range of approximately 1650° F — 1750 0 F, shown at step 206.
  • rolling members 16 may move blank 12 such that first portion 40 of blank 12 may be in superimposition with second rolling members 20c of third station 14c and second and third portions 42 and 44 of blank 12 are in superimposition with first rolling members 18b and second rolling members 20b, respectively, of second station 14b.
  • Second rolling members 20c may contact first portion 40 of blank 12 to form a third shape thereinto. More specifically, the first shape of first portion 40 of blank 12 formed at station 14b, mentioned above, may be transformed into the third shape of first portion 40 of blank 12 at station 14c by second rolling members 20c, shown at step 208.
  • first rolling members 18b may contact second portion 42 of blank 12 to transfer the current to blank 12 to heat second portion 42 of blank 12 to a temperature such that second portion 42 of blank 12 may be in a superplastic state, shown at step 208.
  • second rolling members 20b may contact third portion 44 of blank 12 to form a fourth shape thereinto, shown at step 208.
  • rolling members 16 may move blank 12 such that second portion 42 of blank 12 may be in superimposition with second rolling members 20c of third station 14c and third portion 44 of blank 12 is in superimposition with first rolling members 18b of second station 14b.
  • Second rolling members 20c may contact second portion 42 of blank 12 to form a fifth shape thereinto. More specifically, the second shape of second portion 42 of blank 12 formed at second station 14b, mentioned above, may be transformed into the fifth shape of second portion 42 of blank 12 at third station 14c by second rolling members 20c, shown at step 210.
  • third portion 44 of blank 12 may decrease to a magnitude such that third portion 44 of blank 12 may not be in a superplastic state. As a result, the temperature of third portion 44 of blank 12 may need to be increased.
  • first rolling members 18b may contact third portion 44 of blank 12 to transfer the current to blank 12 to heat third portion 44 of blank 12 to a temperature such that third portion 44 of blank 12 may be in a superplastic state, shown at step 210.
  • rolling members 16 may move blank 12 such that third portion 44 of blank 12 may be in superimposition with second rolling members 20c of third station 14c.
  • Second rolling members 20c of third station 14c may contact third portion 44 of blank 12 to form a sixth shape thereinto. More specifically, the fourth shape of third portion 44 of blank 12 formed at second station 14b, mentioned above, may be transformed into the sixth shape of third portion 44 of blank 12 at third station 14c, shown at step 212. To that end, system 10 has formed a final desired shape into blank 12.
  • blank 12 is shown comprising three portions 40, 42, and 44. This is merely for ease of example of blank 12 being subjected to the process of system 10 and blank 12 may comprise any number of portions to form a desired shape therein.
  • system 10 is shown having a plurality of stations 14 for ease of understanding. System 10 may have stations 14 arranged in any order and any configuration such that system 10 may to form a desired shape into blank 12.
  • blank 12 may be exposed to an environment within system 10 comprising oxygen. As a result, in temperatures above approximately 1000° F, blank 12 may absorb the oxygen resulting in alpha case build up within blank 12, which may undesirable. However, as mentioned above, any portion of blank 12 may be exposed to temperatures to place the same in a superplastic state for a limited period of time, and a result, alpha case build up within blank 12 may be minimized, if not prevented, which is desirable. In a further embodiment to minimize, if not prevent, alpha case build up within blank 12, blank 12 may be exposed to an environment within system 10 comprising an inert gas, such as argon.
  • an inert gas such as argon.

Abstract

L’invention concerne un procédé de formage de structures en titane et, de manière plus particulière, un procédé de formage superplastique par laminage continu de structures en titane. Dans un mode de réalisation, un procédé de formage d’un profilé dans un article (12) contenant du titane consiste, entre autres, à fournir des premiers (18) et seconds (20) éléments de laminage, les premiers éléments de laminage (18) étant conducteurs et les seconds éléments de laminage (20) étant des éléments de profilage par laminage continu. Le procédé de formage consiste en outre à mettre les premiers éléments de laminage (18) en contact avec l’article (12) afin de transférer un courant vers l’article (12) de manière à chauffer l’article (12) à une température appropriée pour le formage superplastique; et à mettre les seconds éléments de laminage en contact avec l’article (12) à l’état superplastique, de manière à profiler l’article (12).
PCT/US2009/055305 2008-08-29 2009-08-28 Formage superplastique par laminage continu de structures en titane WO2010025327A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/201,477 2008-08-29
US12/201,477 US20100050726A1 (en) 2008-08-29 2008-08-29 Superplastically Continuous Roll Forming Titanium

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WO2010025327A1 true WO2010025327A1 (fr) 2010-03-04

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Cited By (1)

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WO2012059233A1 (fr) * 2010-11-03 2012-05-10 Johnson Controls Gmbh Procédé de formage aux rouleaux de profilés et élément structural ainsi fabriqué

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JP4910071B1 (ja) * 2011-04-28 2012-04-04 昭男 平根 板金修復治具

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US20060086774A1 (en) * 2004-10-21 2006-04-27 The Boeing Company Formed structural assembly and associated preform and method

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GB1501623A (en) * 1974-02-15 1978-02-22 Int Harvester Co Metal shaping processes
EP1607147A1 (fr) * 2004-06-17 2005-12-21 PLANSEE Aktiengesellschaft Procédé et machine pour la production d'une tôle mince ou d'une feuille de matière métallique par laminage
US20060086774A1 (en) * 2004-10-21 2006-04-27 The Boeing Company Formed structural assembly and associated preform and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012059233A1 (fr) * 2010-11-03 2012-05-10 Johnson Controls Gmbh Procédé de formage aux rouleaux de profilés et élément structural ainsi fabriqué
CN103189153A (zh) * 2010-11-03 2013-07-03 约翰逊控股公司 滚压成形型材的方法和由此生产的结构件
JP2013544190A (ja) * 2010-11-03 2013-12-12 ジョンソン・コントロールズ・ゲー・エム・ベー・ハー 外形の圧延成形方法及びこれにより製造される構造部品
CN103189153B (zh) * 2010-11-03 2016-06-08 约翰逊控股公司 滚压成形型材的方法和由此生产的结构件

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