GB795994A - Improvements in or relating to method of making metal fabrications - Google Patents
Improvements in or relating to method of making metal fabricationsInfo
- Publication number
- GB795994A GB795994A GB1775856A GB1775856A GB795994A GB 795994 A GB795994 A GB 795994A GB 1775856 A GB1775856 A GB 1775856A GB 1775856 A GB1775856 A GB 1775856A GB 795994 A GB795994 A GB 795994A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- pattern
- areas
- per cent
- patterns
- 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.)
- Expired
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
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
- B21D53/045—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal by inflating partially united plates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
795,994. Making heat exchangers. OLIN MATHIESON CHEMICAL CORPORATION. June 8, 1956, No. 17758/56. Class 83 (2). A method of making metal fabrications adapted to be inflated by fluid pressure to make a hollow metal article such as a heat-exchanger comprises positioning a pattern of stop-off material on a metal sheet, bending and folding the sheet into layers lying in face-to-face relationship and having said pattern lying therebetween, and thereafter, while the layers are secured against relative slippage by the folded edge, pressure welding by rolling those areas not protected by stop-off material. A sheet 1 of copper alloy is grooved at 2, is degreased, cleaned, rinsed and dried and then has a foreshortened pattern of stop-off material 5 applied, e.g. by a silk screen, to one half 3 of the surface of the sheet not containing the groove 2. The stop-off material 5 comprises a mixture of 13 per cent colloidal graphite, 40 per cent calcium carbonate having a granulation of less than 325 mesh, and the balance water. The sheet 1 is then folded about the groove 2 so that the pattern is interposed between adjacent surfaces of the folded sheet. This assembly is then heated to about 900‹ C. in a reducing atmosphere and while hot passed through a rolling mill in the direction of foreshortening of the pattern to reduce its thickness about 50 per cent in a single pass, thus welding those parts 9 of the sheet not separated by the pattern of stopoff material into a unitary structure. The assembly is then cleaned, rinsed and dried and cold rolled to bring the length to that desired. The structure is then annealed at 750‹ C. for half and hour and, after cleaning and drying, trimmed along its edges removing the folded edge 6. The unwelded areas are then expanded by fluid pressure applied through a tube 7. In another embodiment, Fig. 7, two grooves are cut in opposite faces of a sheet to divide it into three equal areas 11, 12, 13, foreshortened patterns are applied to the areas 11, 13 and the sheet is bent over to Z form and then pressed flat. The assembly is then pressurewelded by hot rolling, then cleaned, cold-rolled, annealed and trimmed. The unwelded patterns are then expanded by fluid pressure. In a further embodiment, Fig. 9, two grooves are formed on the same surface of the sheet, dividing the sheet into three areas 31, 32, 33, the area 33 being equal to, or greater than, the sum of the areas 31, 32. Patterns 34, 35 are applied to the areas 31, 32 which are then bent over on to the area 33. The assembly is hot rolled and treated as in the other embodiments and may be slit into two along the abutting edges 36, 37. In a further embodiment, Fig. 10 (not shown), a folded edge is introduced through the rollers first. One part of a pattern may be placed on one opposing surface and the remainder on the other opposing surface or duplicate patterns may be placed on each surface. Sheets of copper, copper alloy, bronze, brass or aluminium may be used. For copper alloy the reduction in one pass of the hot rolling must be at least 35 per cent and for aluminium at least 60 per cent.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1775856A GB795994A (en) | 1956-06-08 | 1956-06-08 | Improvements in or relating to method of making metal fabrications |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1775856A GB795994A (en) | 1956-06-08 | 1956-06-08 | Improvements in or relating to method of making metal fabrications |
Publications (1)
Publication Number | Publication Date |
---|---|
GB795994A true GB795994A (en) | 1958-06-04 |
Family
ID=10100709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1775856A Expired GB795994A (en) | 1956-06-08 | 1956-06-08 | Improvements in or relating to method of making metal fabrications |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB795994A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1288884B (en) * | 1958-08-29 | 1969-02-06 | Wieland Werke Ag | Process for the production of single or multi-channel sheets or bands |
-
1956
- 1956-06-08 GB GB1775856A patent/GB795994A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1288884B (en) * | 1958-08-29 | 1969-02-06 | Wieland Werke Ag | Process for the production of single or multi-channel sheets or bands |
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