IL41228A - Method of forming fins on tubes of difficult-to-roll meta - Google Patents
Method of forming fins on tubes of difficult-to-roll metaInfo
- Publication number
- IL41228A IL41228A IL41228A IL4122873A IL41228A IL 41228 A IL41228 A IL 41228A IL 41228 A IL41228 A IL 41228A IL 4122873 A IL4122873 A IL 4122873A IL 41228 A IL41228 A IL 41228A
- Authority
- IL
- Israel
- Prior art keywords
- metal
- tubes
- fins
- fin
- rib
- Prior art date
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Rod-Shaped Construction Members (AREA)
- Metal Rolling (AREA)
Abstract
Rolling of high-fin integral finned tube from stainless steel or other difficult to form material, in two operations with an annealing step between rolling operations. Each rolling operation quickly forms narrow helical grooves to displace metal into wide helical ribs or rib portions, followed by more gradual widening and deepening of the grooves with additional metal displacement, and lateral application of pressure to the ribs to form it to required fin shape.
[US3795125A]
Claims (9)
1. The method of forming/fins of at least .100" fin height and of predetermined pitch on tubes of dlfflcnl-to—roll metal each as stainless ateel which comprises forming partial fins of substantially leas than final height and of less than aald predetermined pitch in a first operation by supporting the tubes on mandrels and applying pressure of metal deforming intensity to limited aonea radially inwardly and progressively around the tubes in helical paths of less than aald predetermined pitch to produce partially formed fins, annealing the tubes, and providing a second forming operation by supporting the tubes on a mandrel and applying pressure of metal deforming intensity to limited zones both at the bottom of the apacea between partially formed fine and to the aides of the partially formed Una along helical paths of aald predetermined pitch to displace metal from the bottom of the spaces between adjacent fine, and to displace metal laterally of the fins to 1 increase the outside diameter of the fin crests, both metal displacements serving to Increase the height of the Individual fins.
2. She method of claim 1 which comprises in each forming operation both before and after/the annealing step, Initially applying pressure to relatively narrow zones to form relatively deep narrow grooves leaving relatively vide ribs formed partially of materiel of the tubes displaced by formation of the grooves, and thereafter gradually widening the acnes of pressure application and deepening the grooves to displace additional material into the ribs and to apply pressure to the of the ribs to form ribs in the first operation and 41228/2 adjacent the outer edge portion thereof.
3. ¾e method of claim 2 in which the increase in the pitch of fin convolutions formed by the second operation over the pitch of rib convolutions formed by the first operatio is about 3-5$.
4. * The method of claim 1, which comprises using a set of axially aligned discs in each operation, the discs of each set having the first ew discs provided with rounded peripheral portions of a predetermined small radius in radial cross-section and of a predetermined substantial increase in diameter from disc to disc whereby to penetrate into the material of the tube quickl to substantial depths9 the remainder of the discs of each se having peripheral portions of progressively greater radius of curvature in cross-eection and of substantially less increase in diameter from disc to disc, whereby in each rollin operation a relatively thick rib portio of material is displaced from the tube material and thereafter shaped into a narrower highe cross-sectional shape,
5. 5?he method of forming fins on the exterior of metal tu¾es in which the fins are characterized by exceptional height and a thickness at the crest which is at least half the thickness adjacent the root which corartiises repeatedly applying pressure in a first rolling operation to adjacent narro zones progressively around the tube in a helical path to penedsrate into the tube material and to initially displace a substantial quantity of metal into a helical, short, thick rib and therea er progress 41228/2 terminating the application of pressure and annealing the tube, and therea ter in a second rolling operatio repeatedly applying pressure in the helical spaces between rib convolution in narrow zones with increased penetration i to the tube material to displace a further substantial quantity of material into the rib, and finally displacing material by penetrating into the tube material over zones of increased width at a reduced rate of penetration tinto the tube material while applying lateral pressure to shape the rib into a fin of ther required dimension,
6. * She method of claim 5 which comprises a the start of each rib forming operation, applying pressure to obtain a metal displacing penetration into the tube material several times as great as the penetration obtained upon subsequen application o pressure.
7. The method of claim 6 in which the fin heigh is produced in the first operation is at least .060* and in the second operation is at least •lOO"· -
8. fhe method of claim 6 in which the fin height produced in the first operation is at least *075n and i the second operation is at least •H5W·
9. The method as defined in claim 5, which comprises the step of increasing the pitch of fin convolutions between successive volting operations, in which the increase of pitch between successive rolling operations is about 5-5 · For the Applicants HE:PE
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US22135872A | 1972-01-27 | 1972-01-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
IL41228A0 IL41228A0 (en) | 1973-03-30 |
IL41228A true IL41228A (en) | 1976-10-31 |
Family
ID=22827480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL41228A IL41228A (en) | 1972-01-27 | 1973-01-03 | Method of forming fins on tubes of difficult-to-roll meta |
Country Status (16)
Country | Link |
---|---|
US (1) | US3795125A (en) |
JP (1) | JPS529435B2 (en) |
AR (1) | AR199096A1 (en) |
AT (1) | AT345234B (en) |
AU (1) | AU470554B2 (en) |
BR (1) | BR7300626D0 (en) |
CA (1) | CA980099A (en) |
CH (1) | CH557015A (en) |
DE (1) | DE2303192A1 (en) |
EG (1) | EG10818A (en) |
ES (1) | ES410739A1 (en) |
FR (1) | FR2169178B1 (en) |
GB (1) | GB1409016A (en) |
IL (1) | IL41228A (en) |
IT (1) | IT976955B (en) |
ZA (1) | ZA7386B (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4951742A (en) * | 1975-04-02 | 1990-08-28 | High Performance Tube, Inc. | Refractory heat exchange tube |
US3999416A (en) * | 1975-10-24 | 1976-12-28 | General Electric Company | Cold rolling a contour in metal rings |
FR2477917A1 (en) * | 1980-03-13 | 1981-09-18 | Mansfeld Kombinat W Pieck Veb | FORMING CYLINDER |
EP0096021A1 (en) * | 1981-12-10 | 1983-12-21 | ANDERSSON, Rune | Gilled tube construction |
JPS59170830U (en) * | 1983-04-30 | 1984-11-15 | 日本電産コパル株式会社 | Digitally controlled camera shutter |
US4915166A (en) * | 1983-08-04 | 1990-04-10 | Wolverine Tube, Inc. | Titanium heat exchange tubes |
CA1247592A (en) * | 1983-08-04 | 1988-12-28 | James L. Cunningham | Finned heat exchanger tubes and method and apparatus for making same |
US4692978A (en) * | 1983-08-04 | 1987-09-15 | Wolverine Tube, Inc. | Method for making heat exchange tubes |
US4616391A (en) * | 1985-06-24 | 1986-10-14 | Wolverine Tube, Inc. | Apparatus for making heat exchange tubes |
DE3762920D1 (en) * | 1987-07-30 | 1990-06-28 | Wieland Werke Ag | RIB TUBE. |
AT403320B (en) * | 1996-03-04 | 1998-01-26 | Vaillant Gmbh | HEAT EXCHANGER ELEMENT AND HEAT EXCHANGER COMPOSED OF SUCH ELEMENTS |
DE102013104806A1 (en) * | 2013-05-08 | 2014-11-13 | Sandvik Materials Technology Deutschland Gmbh | belt furnace |
CN107976101B (en) * | 2017-12-22 | 2023-07-14 | 上海发电设备成套设计研究院有限责任公司 | Using method of outer fin heat exchange tube |
CN112296617B (en) * | 2020-10-14 | 2022-09-06 | 江苏隆达超合金股份有限公司 | Production method of high-fin cupronickel alloy high-efficiency tube |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2431863A (en) * | 1943-05-03 | 1947-12-02 | Calumet And Hecla Cons Copper | Apparatus for forming finned tubing |
US3174319A (en) * | 1962-01-05 | 1965-03-23 | Nihon Kentetsu Company Ltd | Method and apparatus for manufacturing integrally finned tubing |
FR1338499A (en) * | 1962-08-13 | 1963-09-27 | Lorraine Escaut Sa | Method and device for rolling helical fins on a metal tube |
US3383893A (en) * | 1965-08-16 | 1968-05-21 | Calumet & Hecla | Apparatus for producing integral finned tubing of fine pitch |
US3379042A (en) * | 1965-12-27 | 1968-04-23 | Nat Acme Co | Method and machine for form rolling |
US3600922A (en) * | 1969-03-05 | 1971-08-24 | Carrier Corp | Manufacture of integrally finned tubing |
US3648502A (en) * | 1970-03-04 | 1972-03-14 | Trane Co | Method and apparatus for forming a heat exchanger tube with closely spaced integral fins |
-
1972
- 1972-01-27 US US00221358A patent/US3795125A/en not_active Expired - Lifetime
-
1973
- 1973-01-03 IL IL41228A patent/IL41228A/en unknown
- 1973-01-08 CA CA160,728A patent/CA980099A/en not_active Expired
- 1973-01-11 AU AU50981/73A patent/AU470554B2/en not_active Expired
- 1973-01-18 ES ES410739A patent/ES410739A1/en not_active Expired
- 1973-01-18 IT IT47770/73A patent/IT976955B/en active
- 1973-01-22 AT AT53473A patent/AT345234B/en not_active IP Right Cessation
- 1973-01-23 DE DE2303192A patent/DE2303192A1/en active Pending
- 1973-01-24 FR FR7302412A patent/FR2169178B1/fr not_active Expired
- 1973-01-25 AR AR246285A patent/AR199096A1/en active
- 1973-01-25 EG EG31/73A patent/EG10818A/en active
- 1973-01-25 CH CH105473A patent/CH557015A/en not_active IP Right Cessation
- 1973-01-26 JP JP48010347A patent/JPS529435B2/ja not_active Expired
- 1973-01-26 BR BR73626A patent/BR7300626D0/en unknown
- 1973-01-26 GB GB402473A patent/GB1409016A/en not_active Expired
- 1973-07-04 ZA ZA730086*[A patent/ZA7386B/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR2169178A1 (en) | 1973-09-07 |
CA980099A (en) | 1975-12-23 |
ZA7386B (en) | 1973-09-26 |
ES410739A1 (en) | 1976-01-01 |
AU5098173A (en) | 1974-07-11 |
ATA53473A (en) | 1978-01-15 |
JPS529435B2 (en) | 1977-03-16 |
GB1409016A (en) | 1975-10-08 |
FR2169178B1 (en) | 1978-09-08 |
JPS4886770A (en) | 1973-11-15 |
CH557015A (en) | 1974-12-13 |
US3795125A (en) | 1974-03-05 |
IT976955B (en) | 1974-09-10 |
BR7300626D0 (en) | 1973-09-18 |
AU470554B2 (en) | 1976-03-18 |
EG10818A (en) | 1976-10-31 |
AT345234B (en) | 1978-09-11 |
AR199096A1 (en) | 1974-08-08 |
DE2303192A1 (en) | 1973-08-09 |
IL41228A0 (en) | 1973-03-30 |
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