US3918626A - Method of fabricating patterned tubing from metallic strip - Google Patents
Method of fabricating patterned tubing from metallic strip Download PDFInfo
- Publication number
- US3918626A US3918626A US359019A US35901973A US3918626A US 3918626 A US3918626 A US 3918626A US 359019 A US359019 A US 359019A US 35901973 A US35901973 A US 35901973A US 3918626 A US3918626 A US 3918626A
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- US
- United States
- Prior art keywords
- pattern
- strip
- tubing
- smooth
- tube
- 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 - Lifetime
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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
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/083—Supply, or operations combined with supply, of strip material
-
- 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
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
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- 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
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
-
- 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
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
- F28F1/424—Means comprising outside portions integral with inside portions
- F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
Definitions
- This invention relates to the continuous fabrication of tubing using metallic strip as a starting material.
- metallic strip of predetermined width tube forming processes which include continuously embossing one or more surfaces of the strip in accordance with any desired pattern prior to entry into the tube mill so that the tubing ultimately formed has an embossed surface on the interior orthe exterior or both surfaces of the tube wall as desired.
- the pattern structure is a matter of choice consistent with the ultimate use of the tubing.
- the co-pending applications are also directed to physically and continuously deforming the strip, prior to entry into the tube mill, by generating longitudinal, spiral or transverse striations, grooves or channels in the strip.
- the tube ultimately fabricated from deformed strip has a wall structure which has been physically shaped in one fashionor another in contrast to tube wall structure developed from embossed strip.
- the pattern generated by deforming the strip is a matter of choice governed by ultimate tube use.
- a pattern may be generated on one or more sides of the strip so that the wall of the tube ultimately formed may carry a pattern on the internal wall surface or the external .wall surface or on both wall surfaces, as desired.
- surface treatments on one or more sides of the strip or deformation of the strip, which generate discernable surface indicia or which generate deformed wall structure in the tubing, are all referred to as formed pattern,
- the method of developing the pattern by surface treatment or the method of developing the pattern by deforming the strip are a matter of choice and are not critical to the principles of the present invention.
- a process embracing certain principles of the present invention may comprise the steps of: providing a strip of metal of predetermined width, indefinite lengths and side edges; continuously advancing the strip; continuously forming patterns on at least one surface of the strip during the course of advance; intermittently interrupting the pattern forming step to break the continuity of the formed pattern and to create intervening smooth segments in said surface defining a discontinuous pattern; continuously forming said strip into a tube by abutting the side edges to create a seam; continuously closing the seam to create a fluid-tight seal; and thereafter continuously separting the tubing into discrete lengths, said separating step occurring in the regions of the tube defined by said smooth segments.
- FIG. 8 shows a typical tube forming die
- FIG. 9 is a side view of a mill arrangement operative to generate patterns on the strip in discontinuous fash-
- FIG. 10 shows, schematically, a typical tube forming operation starting with the strip supply and ending with tube cutting or separation;
- FIGS. l1 and 12 illustrate points at which the tube may be separated or cut into discrete lengths.
- the reference numeral l designates a finished length of tubing having smooth ends 11 and I2 and an intermediate patterned segment 13.
- the internal surface ofthe tube I4 is smooth throughout.
- FIG. 2 shows a length of tubing having a smooth external surface 16 throughout its length with an interior patterned surface I7 terminating in smooth ends 18 and I9.
- FIG. 3 shows a still further variation in that tube 20 is formed with a pattern 21 throughout its interior and the exterior surface is smooth as at 22 and patterned at each end as indicated by the reference numerals 23 and 24.
- FIGS. 4 and 5 each illustrate a pair of cooperating mill rolls, 26-27 and 28-29 operative to form a pattern "P on one or both surfaces of strip 5 as disclosed in said co-pending applications.
- FIG. 6 shows mill rolls 31-32 operative to physically deform strip S by generating striations or corrugations indicated by the reference numeral 33, also disclosed and described in the co-pending applications.
- a discontinuity of pattern can be generated on the bottom surface 52 of the strip leaving the top surface 53 smooth, or vice versa.
- the pattern forming mill M can be operated to generate pattern discontinuites in top and bottom surfaces of the strip (interior and exterior surfaces of tubing) which are phased (or displaced) from one another so that a particular tube segment ultimately formed can be smooth (or formed with a pattern) on both surfaces in a particular selected segment or a pattern can be displaced on one surface relative to the pattern on the opposite surface.
- smooth and patterned tube segments on the interior and exterior surfaces of a given length of tubing can be phased or displaced as design considerations in the ultimate use of the tube dicatate.
- FIG. 3 shows a displaced pattern in that segment 22 on the exterior surface of the tube 20 is smooth, while the interior surface 21 is formed with a pattern throughout without any discontinuity.
- the window 50in FIG. 1i illustrates a phased pattern.
- tubing fabricated in accordance with the principles of the invention involves heat exchanger applications, it entirely within the scope of the invention to utilize the exterior ornamentation and aesthetic design features of the finished tubing in applications other than in the field of heat exchangers.
- a method of continuously fabricating metallic tubing having formed patterns on the tubing wall comprising the steps of:
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A method of fabricating tubing having formed patterns in or upon the tubing wall where the formed pattern is interrupted by contiguous wall sections or segments which are free of said formed pattern facilitating the manufacture of discrete tube lengths having smooth or patterned wall structure in any desired continuity or configuration.
Description
[ Nov. 11, 1975 v [75] Inventor:
[ 1 METHOD OF FABRICATING PATTERNED TUBING FROM METALLIC STRIP Charles D. McLain, Alton, Ill.
[73] Assignee: Olin Corporation, New Haven,
Conn.
[22] Filed: May 10, 1973 21 Appl. No.: 359,019
Related US. Application Data [63] Continuation-impart of Ser. Nos. 214.034. Dec. 30. 1971, abandoned, and Ser. No. 218.422. Jan. 17. 1972, abandoned.
[52] US. Cl. 228/147; 228/152; 219/67; 72/196; 72/368 [51] Int. Cl. B21C 37/08 Field of Search 29/477.7, 477, 157.3 R; 219/85, 67; 72/196, 366-368; 228/144, 146, 147, 17.5, 152
[56] References Cited UNlTED STATES PATENTS 1.211.460 1/1917 Lindquist 72/196 CUT 1.522.963 1/1925 Matthews 29/477 1.811.678 6/1931 2.265.129 12/1941 Darner 2.641.830 6/1953 Lamb et a1 3.165.815 1/1965 Wogerbauer....
3,407,638 10/1969 Greis et a1. 72/96 3.831.675 8/1974 McLain 29/477 X Primary E.\'aminerAl Lawrence Smith Assistant E.\'aminerK. J. Ramsey Attorney, Agent, or FirmRobert H. Bachman [5 7 ABSTRACT A method of fabricating tubing having formed patterns in or upon the tubing wall where the formed pattern is interrupted by contiguous wall sections or seg ments which are free of said formed pattern facilitating the manufacture of discrete tube lengths having smooth or patterned wall structure in any desired continuity or configuration.
8 Claims, 12 Drawing Figures CUT US. Patent N0v.11, 1975 Sheet10f4 3,918,626
U.S. Patent Nov. 11, 1975 Sheet 2 Of4 3,918,626
US. Patent Nov. 11,1975 Sheet 3 014 3,918,626
TUBE FORMING MILL STRIP SUPPLY I U .S. Patent Nov.1 1,1975 Sheet40f4 3,918,626
WELD
BEAD REMOVAL WE L DING 5 TA T/ON SHAPING AND OR S/Z/NG TUBE F ORM/N G S TR/P CORRUGA T/NG SEPA RA TING STA T/O/V S TR/P SUPPLY cur METHOD OF FABRICATING PATTERNED TUBING FROM METALLIC STRIP CROSS REFERENCE TO RELATED APPLICATIONS This application is a Continuation-In-Part of copending applications Ser. No. 214,034, filed Dec. 30, 1971, and Ser. No. 218,422. filed Jan. I7, 1972, by Charles D. McLain, both now abandoned.
BACKGROUND OF THE INVENTION This invention relates to the continuous fabrication of tubing using metallic strip as a starting material.
For example, metallic strip of predetermined width tube forming processes which include continuously embossing one or more surfaces of the strip in accordance with any desired pattern prior to entry into the tube mill so that the tubing ultimately formed has an embossed surface on the interior orthe exterior or both surfaces of the tube wall as desired. Obviously, the pattern structure is a matter of choice consistent with the ultimate use of the tubing.
The co-pending applications are also directed to physically and continuously deforming the strip, prior to entry into the tube mill, by generating longitudinal, spiral or transverse striations, grooves or channels in the strip. Thus, the tube ultimately fabricated from deformed strip has a wall structure which has been physically shaped in one fashionor another in contrast to tube wall structure developed from embossed strip. Here again, the pattern generated by deforming the strip is a matter of choice governed by ultimate tube use.
Accordingly, the co-pending applications deal with tubing made from strip formed with a pattern by embossing, etching or similar surface treatment or with tubing made from strip formed with a pattern by corrugating, crimping or other metal formimg process.
The co-pending applications also disclose that in the case of strip surface treatment a pattern may be generated on one or more sides of the strip so that the wall of the tube ultimately formed may carry a pattern on the internal wall surface or the external .wall surface or on both wall surfaces, as desired.
Obviously, if the pattern is generated by deforming the strip, it will appear on the interior as well as the exterior of the tube wall. 1
For purposes of claiming the present invention surface treatments on one or more sides of the strip or deformation of the strip, which generate discernable surface indicia or which generate deformed wall structure in the tubing, are all referred to as formed pattern,
pattern forming," or pattern.
The method of developing the pattern by surface treatment or the method of developing the pattern by deforming the strip are a matter of choice and are not critical to the principles of the present invention.
Therefore, it is to be understood that the language process or operation which removes metal from any surface of the strip or which physically deforms the strip prior to entry into the tube mill.
Obviously. the term patternis intended to define the result of such metal removal or metal deformation.
SUMMARY OF THE INVENTION It is a principal object ofthe present invention to provide a process for fabricating discrete lengths of tubing having wall segments or sections defining formed patterns interruped by contiguous wall segments which are smooth or free of said formed pattern.
It is an additional object of the present invention to provide an improved process for continuously fabricating tubing from metallic strip where discrete lengths of tubing are formed with discontinuous patterns in vari' ous combinations and permutations and the discontinuities are exemplified by intervening and contiguous tube segmentswhich are smooth or free of a pattern.
It is a further object of the invention to provide an improved continuous process for generating tubing from metallic strip where the tubing fabricated has a wall formed with a pattern interrupted by contiguous wall segments which are smooth or free of a formed pattern, giving one the option to separate the tubing into discrete lengths in the region ofa pattern or in the region of a smooth segment.
A process embracing certain principles of the present invention may comprise the steps of: providing a strip of metal of predetermined width, indefinite lengths and side edges; continuously advancing the strip; continuously forming patterns on at least one surface of the strip during the course of advance; intermittently interrupting the pattern forming step to break the continuity of the formed pattern and to create intervening smooth segments in said surface defining a discontinuous pattern; continuously forming said strip into a tube by abutting the side edges to create a seam; continuously closing the seam to create a fluid-tight seal; and thereafter continuously separting the tubing into discrete lengths, said separating step occurring in the regions of the tube defined by said smooth segments.
tion with the appended drawings, in which:
applied to the metallic strip is intended to include any BRIEF DESCRIPTION OF DRAWINGS pattern is interrupted by a smooth wall;
FIG. 8 shows a typical tube forming die; FIG. 9 is a side view of a mill arrangement operative to generate patterns on the strip in discontinuous fash- FIG. 10 shows, schematically, a typical tube forming operation starting with the strip supply and ending with tube cutting or separation;
FIGS. l1 and 12 illustrate points at which the tube may be separated or cut into discrete lengths.
Referring now to FIGS. 1, 2 and 3, the reference numeral l designates a finished length of tubing having smooth ends 11 and I2 and an intermediate patterned segment 13. In this case, the internal surface ofthe tube I4 is smooth throughout.
FIG. 2 shows a length of tubing having a smooth external surface 16 throughout its length with an interior patterned surface I7 terminating in smooth ends 18 and I9.
FIG. 3 shows a still further variation in that tube 20 is formed with a pattern 21 throughout its interior and the exterior surface is smooth as at 22 and patterned at each end as indicated by the reference numerals 23 and 24.
FIGS. 4 and 5 each illustrate a pair of cooperating mill rolls, 26-27 and 28-29 operative to form a pattern "P on one or both surfaces of strip 5 as disclosed in said co-pending applications.
FIG. 6 shows mill rolls 31-32 operative to physically deform strip S by generating striations or corrugations indicated by the reference numeral 33, also disclosed and described in the co-pending applications.
In FIG. 7, a discrete length of tubing 34 is formed,
' length'of pattern that one desires to generate) to move from an operative position indicated by the reference numeral 49 to an inoperative position indicated by the reference numeral 51. Byappro'priate control or programming of the operative and inoperative condition of the various pairs of mill rolls, one can generate a broken or interrupted pattern on the strip in accordance 'with various combinations or permutations.'as desired.
For example. a discontinuity of pattern can be generated on the bottom surface 52 of the strip leaving the top surface 53 smooth, or vice versa.
Obviously, if one surface or the other is intended to be smooth throughout, a smooth roll must be placed in working contact with that surface.
Furthermore. with appropriate programming. the pattern forming mill M can be operated to generate pattern discontinuites in top and bottom surfaces of the strip (interior and exterior surfaces of tubing) which are phased (or displaced) from one another so that a particular tube segment ultimately formed can be smooth (or formed with a pattern) on both surfaces in a particular selected segment or a pattern can be displaced on one surface relative to the pattern on the opposite surface. Thus. smooth and patterned tube segments on the interior and exterior surfaces of a given length of tubing can be phased or displaced as design considerations in the ultimate use of the tube dicatate.
For example, FIG. 3 shows a displaced pattern in that segment 22 on the exterior surface of the tube 20 is smooth, while the interior surface 21 is formed with a pattern throughout without any discontinuity. In contrast. the window 50in FIG. 1i illustrates a phased pattern.
Frequently it is necessary to size the strip before its entry into the tube mill to insure a neat. uniform longitudinal seam. Typically this involves scarfing. bevelling or shearing the side edges of thestrip starting material to create a uniform cross-sectional configuration in the strip before entry into the tube mill.
It is to be understood that the process steps of the present invention can be praticed on virtually any metallic strip which is susceptible of pattern forming.
Furthermore. while one principal use of tubing fabricated in accordance with the principles of the invention involves heat exchanger applications, it entirely within the scope of the invention to utilize the exterior ornamentation and aesthetic design features of the finished tubing in applications other than in the field of heat exchangers.
It is anticipated that a variety of pattern modifications maybe devised as considerations of thermal engineering. construction and ornamentation may dictate without departing from the spirit and scope of the invention.
What is claimed is:
I. A method of continuously fabricating metallic tubing having formed patterns on the tubing wall comprising the steps of:
providing a strip of metal of predetermined width. in-
definite length and side edges; continuously advancing the strip; continuously forming patterns on at least one surface of the strip during the course of advance;
intermittently interrupting the pattern forming step to break the continuity of the formed pattern and to create intervening smooth segments in said surface transverse to the strip length. each segment being a discontinuity in the pattern across the width of the strip;
continuously forming said strip into -a tubeby abutting the side edges to create a longitudinal, axially extending, continuous seam;
continuously welding said seam to create a fluid-tight seal;
and thereafter transversely cutting the tubing within smooth segments thereofinto discrete tube lengths.
2. The method of fabricating tubing according to claim 1 in which the tube cutting step occurs within segments having a smooth internal surface.
3. The method of fabricating tubing according to claim I in which the pattern forming step occurs on opposite surfaces of the strip.
4. The method of fabricating tubing according to claim I in which the pattern forming step occurs on opposite surfaces of the strip simultaneously and the interruption step is timed so that the pattern discontinuity on one surface is phased with the corresponding discontinuity on the second surface.
5. The method of fabricating tubing according to claim I in which the pattern forming step occurs on opposite surfaces of the strip simultaneously and the interruption step is timed so that the pattern discontinuity on one surface is displaced with respect to the corresponding discontinuity on the second surface.
6. The method of claim I wherein the intermittent interruption of the pattern forming stepto break continuity of the formed pattern is accomplished by shifting from one pattern configuration to another pattern configuration.
7. A method according to claim 1 in which the pattern forming step comprises forming longitudinally extending corrugations.
8. A method according to claim 1 in which the tube cutting step occurs within segments having a smooth external surface.
Claims (8)
1. A method of continuously fabricating metallic tubing having formed patterns on the tubing wall comprising the steps of: providing a strip of metal of predetermined width, indefinite length and side edges; continuously advancing the strip; continuously forming patterns on at least one surface of the strip during the course of advance; intermittently interrupting the pattern forming step to break the continuity of the formed pattern and to create intervening smooth segments in said surface transverse to the strip length, each segment being a discontinuity in the pattern across the width of the strip; continuously forming said strip into a tube by abutting the side edges to create a longitudinal, axially extending, continuous seam; continuously welding said seam to create a fluid-tight seal; and thereafter transversely cutting the tubing within smooth segments thereof into discrete tube lengths.
2. The method of fabricating tubing according to claim 1 in which the tube cutting step occurs within segments having a smooth internal surface.
3. The method of fabricating tubing according to claim 1 in which the pattern forming step occurs on opposite surfaces of the strip.
4. The method of fabricating tubing according to claim 1 in which the pattern forming step occurs on opposite surfaces of the strip simultaneously and the interruption step is timed so that the pattern discontinuity on one surface is phased with the corresponding discontinuity on the second surface.
5. The method of fabricating tubing according to claim 1 in which the pattern forming step occurs on opposite surfaces of the strip simultaneously and the interruption step is timed so that the pattern discontinuity on one surface is displaced with respect to the corresponding discontinuity on the second surface.
6. The method of claim 1 wherein the intermittent interruption of the pattern forming step to break continuity of the formed pattern is accomplished by shifting from one pattern configuration to another pattern configuration.
7. A method according to claim 1 in which the pattern forming step comprises forming longitudinally extending corrugations.
8. A method according to claim 1 in which the tube cutting step occurs within segments having a smooth external surface.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US359019A US3918626A (en) | 1971-12-30 | 1973-05-10 | Method of fabricating patterned tubing from metallic strip |
| CA198,494A CA1005365A (en) | 1973-05-10 | 1974-04-30 | Patterned tubing and a method of fabricating same from metallic strip |
| GB1939174A GB1448901A (en) | 1973-05-10 | 1974-05-02 | Method of fabricating metallic tubing and a welded hollow metal heat exchanger tube |
| GB4804475A GB1448902A (en) | 1973-05-10 | 1974-05-02 | Method of forming corrugated heat exchanger tube and tubes for heat exchangers |
| AU68613/74A AU489311B2 (en) | 1974-05-06 | Patterned tubing anda method of fabricating same from metallic strep | |
| SE7406020A SE7406020L (en) | 1973-05-10 | 1974-05-06 | |
| DE2422340A DE2422340A1 (en) | 1973-05-10 | 1974-05-08 | PATTERNED TUBES AND METHODS FOR MAKING THEM FROM METAL STRIP |
| JP49052174A JPS5027754A (en) | 1973-05-10 | 1974-05-10 | |
| FR7416321A FR2228550B1 (en) | 1973-05-10 | 1974-05-10 | |
| IT50921/74A IT1021543B (en) | 1973-05-10 | 1974-05-10 | SHAPED PIPE AND METHOD OF MANUFACTURING IT FROM A METALLIC STRIP |
| US506457A US3902552A (en) | 1973-05-10 | 1974-09-16 | Patterned tubing |
| JP9122580A JPS5637495A (en) | 1973-05-10 | 1980-07-03 | Corrugated metal tube for heat exchange and making method of said tube |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21403471A | 1971-12-30 | 1971-12-30 | |
| US359019A US3918626A (en) | 1971-12-30 | 1973-05-10 | Method of fabricating patterned tubing from metallic strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3918626A true US3918626A (en) | 1975-11-11 |
Family
ID=26908622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US359019A Expired - Lifetime US3918626A (en) | 1971-12-30 | 1973-05-10 | Method of fabricating patterned tubing from metallic strip |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3918626A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4270689A (en) * | 1978-07-07 | 1981-06-02 | Donaldson Company, Inc. | Method of forming a tube structure for use in a lap joint |
| DE3326010A1 (en) * | 1983-07-15 | 1985-01-24 | Mannesmann AG, 4000 Düsseldorf | Process and apparatus for the production of welded heat-exchanger tubes |
| US5063769A (en) * | 1986-09-08 | 1991-11-12 | W. R. Grace & Co.-Conn. | Metal honeycomb catalyst support having a double taper |
| US5186034A (en) * | 1992-01-17 | 1993-02-16 | General Motors Corporation | Air center machine with pitch adjustment |
| EP0589104A1 (en) * | 1992-09-22 | 1994-03-30 | Glynwed Tubes & Fittings Limited | Method of producing tubing |
| WO1994007620A1 (en) * | 1992-10-07 | 1994-04-14 | Protol A.G. | Improvements in and relating to machines for forming helically wound lock-seam tubing having multiple wall thickness |
| EP0765701A1 (en) * | 1995-09-26 | 1997-04-02 | Helmut Lingemann GmbH & Co. | Method for making flat tubes for heat exchangers, device and flat tube |
| US6345425B1 (en) | 1999-12-09 | 2002-02-12 | Shape Corporation | Rollformer with transverse scorer |
| US6755005B2 (en) * | 2001-08-10 | 2004-06-29 | General Electric Company | Method and apparatus for stiffening and apparatus |
| US20060150411A1 (en) * | 2002-04-29 | 2006-07-13 | Welser Profile Ag | Method for production of a mining metal plug |
| US20090125118A1 (en) * | 2006-11-15 | 2009-05-14 | Victoria Gong | Patterned mold for medical device |
| ITMI20110540A1 (en) * | 2011-04-01 | 2012-10-02 | Pierino Olmi | DEVICE FOR THE MARKING AND BENDING OF A SHEET IN A PIPE FORMATION PROCESS, A TEST METHOD AND TUBE FORMATION FROM A SHEET, AND A TUBE REALIZED ACCORDING TO THIS METHOD |
| US20120255336A1 (en) * | 2011-04-06 | 2012-10-11 | Chauncey Edward W | Systems and methods for corrugating a metallic tape |
| US8573012B1 (en) * | 2011-08-18 | 2013-11-05 | Wallace S. Paulson | Indexing system for corrugated metal forming |
| US20140042209A1 (en) * | 2012-08-08 | 2014-02-13 | Tae Hun CHOI | Method for manufacturing a spiral groove metal pipe with a symmetrical structure |
| US20230271244A1 (en) * | 2020-06-15 | 2023-08-31 | Hydro Extruded Solutions As | Embossing roll |
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| US3407638A (en) * | 1966-03-24 | 1968-10-29 | Kinefac Corp | Method for forming serrated or corrugated hollow tubes |
| US3831675A (en) * | 1972-01-17 | 1974-08-27 | Olin Corp | Heat exchanger tube |
-
1973
- 1973-05-10 US US359019A patent/US3918626A/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1211460A (en) * | 1914-05-27 | 1917-01-09 | Harry E Sheldon | Corrugating apparatus. |
| US1522963A (en) * | 1923-05-31 | 1925-01-13 | James H Matthews | Method of rolling pipe |
| US1811678A (en) * | 1928-07-27 | 1931-06-23 | Smith Corp A O | Method of making circumferentially corrugated sheet metal pipe |
| US1856888A (en) * | 1930-04-05 | 1932-05-03 | Henry D Scott | Method of manufacturing decorated tubing |
| US2265129A (en) * | 1939-08-22 | 1941-12-09 | Republic Steel Corp | Method of and apparatus for welding tubing or the like |
| US2641830A (en) * | 1948-11-02 | 1953-06-16 | Chicago Pump Co | Method of making corrugated tubes |
| US3165815A (en) * | 1961-07-28 | 1965-01-19 | Voest Ag | Process for the manufacture of sections |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| DE3326010A1 (en) * | 1983-07-15 | 1985-01-24 | Mannesmann AG, 4000 Düsseldorf | Process and apparatus for the production of welded heat-exchanger tubes |
| US5063769A (en) * | 1986-09-08 | 1991-11-12 | W. R. Grace & Co.-Conn. | Metal honeycomb catalyst support having a double taper |
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| US5737832A (en) * | 1992-10-07 | 1998-04-14 | Protol A.G. | In and relating to machines for forming helically wound lock-seam tubing having multiple wall thickness |
| EP0765701A1 (en) * | 1995-09-26 | 1997-04-02 | Helmut Lingemann GmbH & Co. | Method for making flat tubes for heat exchangers, device and flat tube |
| US6345425B1 (en) | 1999-12-09 | 2002-02-12 | Shape Corporation | Rollformer with transverse scorer |
| US6742234B2 (en) | 1999-12-09 | 2004-06-01 | Shape Corporation | Method of rollforming with transverse scorer and dimpler |
| US6755005B2 (en) * | 2001-08-10 | 2004-06-29 | General Electric Company | Method and apparatus for stiffening and apparatus |
| US20060150411A1 (en) * | 2002-04-29 | 2006-07-13 | Welser Profile Ag | Method for production of a mining metal plug |
| US20090125118A1 (en) * | 2006-11-15 | 2009-05-14 | Victoria Gong | Patterned mold for medical device |
| US7832251B2 (en) * | 2006-11-15 | 2010-11-16 | Abbott Laboratories | Patterned mold for medical device |
| ITMI20110540A1 (en) * | 2011-04-01 | 2012-10-02 | Pierino Olmi | DEVICE FOR THE MARKING AND BENDING OF A SHEET IN A PIPE FORMATION PROCESS, A TEST METHOD AND TUBE FORMATION FROM A SHEET, AND A TUBE REALIZED ACCORDING TO THIS METHOD |
| US20120255336A1 (en) * | 2011-04-06 | 2012-10-11 | Chauncey Edward W | Systems and methods for corrugating a metallic tape |
| US8573012B1 (en) * | 2011-08-18 | 2013-11-05 | Wallace S. Paulson | Indexing system for corrugated metal forming |
| US20140042209A1 (en) * | 2012-08-08 | 2014-02-13 | Tae Hun CHOI | Method for manufacturing a spiral groove metal pipe with a symmetrical structure |
| US20230271244A1 (en) * | 2020-06-15 | 2023-08-31 | Hydro Extruded Solutions As | Embossing roll |
| US12128472B2 (en) * | 2020-06-15 | 2024-10-29 | Hydro Extruded Solutions As | Embossing roll |
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