GB2069391A - Forming metal articles - Google Patents
Forming metal articles Download PDFInfo
- Publication number
- GB2069391A GB2069391A GB8104326A GB8104326A GB2069391A GB 2069391 A GB2069391 A GB 2069391A GB 8104326 A GB8104326 A GB 8104326A GB 8104326 A GB8104326 A GB 8104326A GB 2069391 A GB2069391 A GB 2069391A
- Authority
- GB
- United Kingdom
- Prior art keywords
- regions
- sheet members
- reinforcing member
- sheet
- bonded
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks
- B21D26/055—Blanks having super-plastic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A method of forming metal articles comprises placing a pair of sheet members 1, 2 of super- plastically deformable material in opposed, spaced apart relationship, (conveniently by means of a reinforced member 3), heating them to the temperature range within which superplastic deformation can take place, and urging portions of the sheets toward each other until they lie one against the other so that they may be joined together as diffusion bonding, brazing, mechanical locking, and laser bonding etc. <IMAGE>
Description
SPECIFICATION
Forming metal articles
This invention relates to the forming of metal articles of the type having first and second sheet members of superplastically deformable and bondable metal.
According to one aspect of the invention a method of forming such articles includes the steps of placing two sheet members of superplastically deformable metal in opposed spaced apart relationship, heating them to the temperature range within which superplastic forming can take place, and, whilst maintaining certain opposed parts of the members in spaced apart relationship, urging, by gaseous pressure, the remaining parts of the members toward each other until portions thereof lie one against the other and then bonding these portions one to the other.
Preferably, the sheet members are of diffusion bondable material and the members are heated to a temperature range within which diffusion bonding can take place, so that when said portions lie one against the other, they become diffusion bonded.
It is found that those portions which contact one another and become diffusion bonded can conveniently form a web from the two thicknesses of sheet material which lies generally equidistant from said spaced parts and is substantially flat.
Where reinforced metal articles of the type having a reinforcing member of diffusion bondable material lying between first and second sheet members of superplastically deformable and diffusion bondable metal are to be formed, a forming method according to a further aspect of the invention includes the steps of placing the reinforcing member between the two sheet members to form an assembly in which first regions of the two sheet members contact opposed regions of the reinforcing member, heating the assembly to the temperature range within which superplastic deformation and diffusion bonding can take place, urging the two sheet members toward the reinforcing member such that their first regions become diffusion bonded to it, superplastically deforming the two sheet members toward each other by gaseous pressure such that second regions of each, adjacent the respective first regions, are urged against the reinforcing member and third regions of each, adjacent the respective second regions, are urged to lie one against the other, the second regions of each sheet member regions becoming diffusion bonded to the reinforcing member and the third regions of each sheet member becoming diffusion bonded one to the other.
Preferably the reinforcing member is in the form of a framework or lattice.
It will be appreciated that this invention is not limited to the forming of metal articles having two sheets of metal which is both superplastically deformable and diffusion bondable; some metals which are superplastically deformable are not susceptible to diffusion bonding (for example aluminium). For such metals different forms of
bonding must be employed.
Examples of possible forms of bonding are brazing, eutectic bonding, liquid phase bonding, or by means of a chemical adhesive or by mechanical locking. In the cases where a bonding metal is used to form the bond, this may be applied to a sheet to be bonded by any of the following processes: Coating; application of a foil; electrolytic plating; vapour deposition; ion plating; ion sputtering; metal spraying; or plasma spray. The bonding metal may be an aluminium alloy.
Where a chemical adhesive is employed, this may be a high temperature curing resin, for example polyimide adhesive.
One method of forming a reinforced panel according to the invention is described by way of example with reference to the accompanying drawings, in which
Figure 1 is a partially cross-sectioned local isometric view of components of an unformed panel,
Figure 2 is a similar view of a partially formed panel,
Figure 3 is a similar view of a formed panel, and
Figure 4 is a view of a larger region of a formed panel.
In Figure 1 two sheets 1 and 2 of a diffusion bondable and superplastically deformable metal are placed one to each side of a reinforcing framework 3, that is to say a lattice, exemplified by a single illustrated member. The framework is formed of a diffusion bondable metal. The components 1, 2, and 3 are positioned in a mould tool, not shown, but of a known design which allows heating to superplastic deformation and diffusion bonding temperatures and also the introduction of a pressurised inert gas to the exterior of the sheets 1 and 2.
As illustrated in Figure 1, the components 1, 2, and 3 are so positioned within the mould tool that first regions A of the sheets contact opposed regions a of the framework.
The tool (together with the components 1, 2, and 3), is then heated to the desired temperature and the sheets 1 and 2 are urged, by externally applied force or by gas pressure, against the framework 3 so that the first regions A become diffusion bonded to the opposed regions a.
Further application of gas pressure simultaneously deforms the sheets 1 and 2 inwardly, that is to say towards each other as illustrated in Figure 2. It is found that regions B of the sheets 1 and 2 lying to each side of the regions A become folded inwards to lie against flank regions b of the framework 3 and become diffusion bonded to them. Also, it is found that regions C of the sheets 1 and 2, lying to each side of the regions B, abut and become diffusion bonded to one another, forming webs from the two thicknesses which lie in a plane generally parallel to the original plans of the sheets 1 and 2.
The regions B, it is found, naturally assume similar lengths so that the webs formed by the regions C tend to lie equidistant from the regions A in a flat condition.
The completed panels have stiffness properties and a configuration similar to those panels formed by removal of pockets of material (for example, by machining, electro-erosion, or electro-chemical action) from a solid billet.
Claims (7)
1. A method of forming metal articles which includes the steps of placing two sheet members of superplastically deformable metal in opposed spaced apart relationship, heating them to the temperature range within which superplastic forming can take place, and, whilst maintaining certain opposed parts of the members in spaced apart relationship, urging, by gaseous pressure, the remaining parts of the members toward each other until portions thereof lie one against the other and then bonding these portions one to the other.
2. A method according to Claim 1, in which the two sheet members are of diffusion bondable metal, and the sheet members are heated to a temperature range in which diffusion bonding can take place, so that when said regions lie one against the other, they become diffusion bonded.
3. A method according to Claim 1, in which a joining agent is applied to at least part of one or both of the surfaces to be bonded prior to superplastic deformation of the sheet members, which joining agent serves to effect a bond between the sheet members.
4. A method according to any of the preceding claims, in which those portions of the sheet members which contact one another and become bonded form a web from the two thicknesses of sheet material which lies generally equidistant from said spaced parts of the sheet members and is substantially flat.
5. A method according to any of the preceding claims, which further includes the steps of placing a reinforcing member between the two sheet members to form an assembly in which first regions of the two sheet members contact opposed regions of the reinforcing member, heating the assembly to the temperature range within which superplastic deformation can take place, urging the two sheet members toward the reinforcing member, bonding their first regions to the reinforcing member, superplastically deforming the two sheet members toward each other by gaseous pressure such that second regions of each, adjacent the respective first region, are urged against the reinforcing member and third regions of each, adjacent the respective second regions, are urged to lie one against the other, the second regions of each sheet member being bonded to the reinforcing member and the third regions of each sheet member being bonded one to the other.
6. A method according to Claim 5 in which the reinforcing member is in the form of a framework or lattice.
7. A method of forming metal articles substantially as hereinbefore described, with reference to, and as illustrated in, any of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8104326A GB2069391B (en) | 1980-02-15 | 1981-02-12 | Forming metal articles |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8005255 | 1980-02-15 | ||
| GB8104326A GB2069391B (en) | 1980-02-15 | 1981-02-12 | Forming metal articles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2069391A true GB2069391A (en) | 1981-08-26 |
| GB2069391B GB2069391B (en) | 1983-06-02 |
Family
ID=26274518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8104326A Expired GB2069391B (en) | 1980-02-15 | 1981-02-12 | Forming metal articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2069391B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5287918A (en) * | 1990-06-06 | 1994-02-22 | Rolls-Royce Plc | Heat exchangers |
| US5385204A (en) * | 1989-08-25 | 1995-01-31 | Rolls-Royce Plc | Heat exchanger and methods of manufacture thereof |
| EP0703019A1 (en) * | 1994-09-21 | 1996-03-27 | Aktiebolaget Electrolux | Method and device for shaping details by means of superplastic forming |
| US5505256A (en) * | 1991-02-19 | 1996-04-09 | Rolls-Royce Plc | Heat exchangers and methods of manufacture thereof |
| US20070204954A1 (en) * | 2005-11-21 | 2007-09-06 | Lpkf Laser & Electronics Ag | Process and device for form locked joining of two components |
-
1981
- 1981-02-12 GB GB8104326A patent/GB2069391B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385204A (en) * | 1989-08-25 | 1995-01-31 | Rolls-Royce Plc | Heat exchanger and methods of manufacture thereof |
| US5287918A (en) * | 1990-06-06 | 1994-02-22 | Rolls-Royce Plc | Heat exchangers |
| US5505256A (en) * | 1991-02-19 | 1996-04-09 | Rolls-Royce Plc | Heat exchangers and methods of manufacture thereof |
| EP0703019A1 (en) * | 1994-09-21 | 1996-03-27 | Aktiebolaget Electrolux | Method and device for shaping details by means of superplastic forming |
| US20070204954A1 (en) * | 2005-11-21 | 2007-09-06 | Lpkf Laser & Electronics Ag | Process and device for form locked joining of two components |
| US8759710B2 (en) * | 2005-11-21 | 2014-06-24 | Lpkf Laser & Electronics Ag | Process and device for form locked joining of two components |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2069391B (en) | 1983-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20010211 |