GB845242A - Improved means for forming integral finned metal tubing - Google Patents
Improved means for forming integral finned metal tubingInfo
- Publication number
- GB845242A GB845242A GB40258A GB40258A GB845242A GB 845242 A GB845242 A GB 845242A GB 40258 A GB40258 A GB 40258A GB 40258 A GB40258 A GB 40258A GB 845242 A GB845242 A GB 845242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- discs
- annuli
- fin
- rib
- 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
- 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
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
845,242. Rolling ribbed tubes. ACCLES & POLLOCK Ltd. Dec. 29, 1958 [Jan. 6, 1958], No. 402/58. Class 83 (4). Means for forming an integral external fin or rib on a metal tube by displacement of the metal of the tube comprises at least one freely mounted roll or disc rotated by the rotation of the tube to rib 16 is formed on a steel tube 3 by three roller and disc assemblies mounted on shafts 2 spaced equiangularly about and movable radially towards the tube. Each assembly comprises a roller 4 having integral annuli 5, discs 7 having annuli 11 and freely rotatable discs 12 having annuli 14, the discs 12 being loosely mounted on a spacer ring 8 and having a clearance between each pair of adjacent discs. The discs 7 are clamped to the part 4 between a flange 10 on the shaft 2 and the spacer ring 8 by a nut 9. Alternatively a single solid initial forming roller may replace the part 4 and the discs 7. The parallel-sided annuli 5 and 11 initially form the rib 16 on the tube, when the height of the rib is relatively small. The wedge-shaped annuli 14 of the freely rotating discs 12 then engage the fin and complete the formation, the tips of the annuli having a clearance from the tube wall, while the fin tip is clear of the root of the annuli, thus avoiding a tendency for the tube to lengthen and fracture the discs or damage the fin. The roller 4 and discs 7 are positively driven while the discs 12 are rotated slightly faster by the tube itself, slip between the fin and annuli 14 thus being minimized so preventing tearing of the thin fin. In forming a helical fin the shafts 2 are slightly inclined and the tube 3 is advanced axially during formation of the fin. The freely rotating discs 12 of each assembly may be mounted on a separate shaft in alignment with the shaft 2 for independent traverse towards the tube. In a modification some of the freely rotating discs may have annuli provided with shoulders 21, Fig. 4, which apply a pressure to the fin in a direction substantially radial of the tube 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB40258A GB845242A (en) | 1958-01-06 | 1958-01-06 | Improved means for forming integral finned metal tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB40258A GB845242A (en) | 1958-01-06 | 1958-01-06 | Improved means for forming integral finned metal tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB845242A true GB845242A (en) | 1960-08-17 |
Family
ID=9703755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB40258A Expired GB845242A (en) | 1958-01-06 | 1958-01-06 | Improved means for forming integral finned metal tubing |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB845242A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351879A (en) * | 2018-10-30 | 2019-02-19 | 河北华林机械设备有限公司 | Hot extrusion forming equipment for fin heat exchange tubes |
-
1958
- 1958-01-06 GB GB40258A patent/GB845242A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351879A (en) * | 2018-10-30 | 2019-02-19 | 河北华林机械设备有限公司 | Hot extrusion forming equipment for fin heat exchange tubes |
| CN109351879B (en) * | 2018-10-30 | 2024-03-26 | 张建梅 | Hot extrusion forming equipment for fin heat exchange tube |
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