GB843967A - Improvements in or relating to finned tubing having resistance-welded fins - Google Patents
Improvements in or relating to finned tubing having resistance-welded finsInfo
- Publication number
- GB843967A GB843967A GB37956/57A GB3795657A GB843967A GB 843967 A GB843967 A GB 843967A GB 37956/57 A GB37956/57 A GB 37956/57A GB 3795657 A GB3795657 A GB 3795657A GB 843967 A GB843967 A GB 843967A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- strips
- welding
- base
- wound
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
- B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/08—Seam welding not restricted to one of the preceding subgroups
- B23K11/082—Seam welding not restricted to one of the preceding subgroups of three-dimensional seams
- B23K11/084—Seam welding not restricted to one of the preceding subgroups of three-dimensional seams of helicoïdal seams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
843,967. Making gilled tubes; welding by pressure. BUSSE, F. Dec. 6, 1957 [Dec. 11, 1956], No. 37956/57. Classes 83 (2) and 83 (4). [Also in Group XIII] In making a finned tube, especially for heat-exchangers of gas-cooled atomic power plant a U or channel-shaped strip is wound helically around the tube and the base of the U or channel is electric resistance seam-welded to the tube. A flat metal strip is continuously drawn from a reel, shaped to U-section 2 and then wound helically around the tube 4, Fig. 3, being fed either to contact the tube in advance of a cooled roller electrode 5 engaging the base of the U or directly to the electrode. The pitch of the helix is twice the width of the shaped strip. A second cooled roller electrode 6 is pressed against the tube and the two electrodes are connected to the secondary of a transformer. Two such strips may be wound, preferably simultaneously, on the tube when each roller electrode engages one of the strips. Three or four strips may be welded to the tube. The walls of the U may be spread apart as in Fig. 7 as they approach the tapered electrodes 5, 5a, or the walls may be spread before the strips are wound on the tube and are returned to correct shape after welding. The rollers, which may be trued during welding, are arranged side-by-side or are spaced by 180 degrees around the tube. The tube or base of the U-section strip may be provided with projections 12, Fig. 9, to ensure that rapid heating and welding is effected. In this case the U has a curved base and the rollers have corresponding curved surfaces and after welding the strips are given a rectangular U-section by means 14.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE843967X | 1956-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB843967A true GB843967A (en) | 1960-08-10 |
Family
ID=6774349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37956/57A Expired GB843967A (en) | 1956-12-11 | 1957-12-06 | Improvements in or relating to finned tubing having resistance-welded fins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB843967A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020116437B4 (en) | 2019-06-28 | 2022-02-24 | Schmöle GmbH | Method and device for manufacturing a finned tube |
-
1957
- 1957-12-06 GB GB37956/57A patent/GB843967A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020116437B4 (en) | 2019-06-28 | 2022-02-24 | Schmöle GmbH | Method and device for manufacturing a finned tube |
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