US20010020381A1 - Mechanical pipe expander - Google Patents
Mechanical pipe expander Download PDFInfo
- Publication number
- US20010020381A1 US20010020381A1 US09/783,647 US78364701A US2001020381A1 US 20010020381 A1 US20010020381 A1 US 20010020381A1 US 78364701 A US78364701 A US 78364701A US 2001020381 A1 US2001020381 A1 US 2001020381A1
- Authority
- US
- United States
- Prior art keywords
- polyhedron
- pipe expander
- wear
- mechanical pipe
- segments
- 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.)
- Abandoned
Links
- 239000011159 matrix material Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
Definitions
- the invention relates to a mechanical pipe expander with a pyramidal polyhedron and with segments which are arranged on the jacket surfaces of the polyhedron and can be moved radially by means of an axial displacement of the polyhedron relative to the segments.
- Expanders of this type are used in the production of large welded steel pipes. After welding, the pipes are widened slightly in diameter in order to calibrate the internal diameter, to round the pipes, and to increase the apparent yield strength by cold-forming. Since the pipe materials are sometimes of considerable strength and the pipes can have thick walls, extraordinarily high forces occur upon expansion. For this reason, pipes measuring up to 18 meters in length are widened in stages.
- DE-AS 22 64 207 discloses a suitable expander for this purpose.
- the actual expander head comprises a pyramidal polyhedron which has individual segments arranged on its surfaces. By displacing the polyhedron relative to the segments, these can be moved radially so that the diameter of the expander head increases or decreases.
- this object is achieved by arranging a wear-resistant lining between the surfaces of the polyhedron and the segments.
- This wear lining is preferably made of a carbon fiber composite with a polymer matrix.
- Graphite powder is preferably added to the matrix, specifically in such an amount as to give a coefficient friction of between 0.10 and 0.15 for the wear-resistant lining.
- Such a wear lining can additionally also be arranged on the end faces of the segments.
- Using the wear-resistant lining according to the invention has a final added advantage. If sets of wear linings of different thicknesses are kept available, the diameter range within which the mechanical pipe expander can be used can be substantially increased, without having to make changes to the segments or to the polyhedron itself.
- FIG. 1 shows a simplified longitudinal section through a pipe expander
- FIG. 2 shows a corresponding transverse section.
- the pipe expander 1 has a polyhedron 2 (here a truncated pyramid having an octogonal cross-section) which can be axially displaced by means of a pull rod 6 .
- Segments 3 are arranged on the circumferential surfaces of the polyhedron.
- a wear-resistant lining 5 is in each case arranged between the opposing sliding surfaces of the segments 3 and the polyhedron 2 .
- An additional wear-resistant lining 5 is also present on the end face of each segment 3 .
- corresponding recesses can be provided on the underside of the segments 3 . As is known, by means of an axial displacement of the polyhedron 2 relative to the segments 3 , these are moved radially outward so that in this way expansion of the pipe 4 is possible.
Abstract
A mechanical pipe expander with a pyramidal polyhedron and with segments which are arranged on the circumferential surfaces of the polyhedron and can be moved radially by axially displacing the polyhedron relative to the segments. A wear lining is arranged between each of the surfaces of the polyhedron and each respective segment.
Description
- 1. Field of the Invention
- The invention relates to a mechanical pipe expander with a pyramidal polyhedron and with segments which are arranged on the jacket surfaces of the polyhedron and can be moved radially by means of an axial displacement of the polyhedron relative to the segments.
- 2. Description of the Related Art
- Expanders of this type are used in the production of large welded steel pipes. After welding, the pipes are widened slightly in diameter in order to calibrate the internal diameter, to round the pipes, and to increase the apparent yield strength by cold-forming. Since the pipe materials are sometimes of considerable strength and the pipes can have thick walls, extraordinarily high forces occur upon expansion. For this reason, pipes measuring up to 18 meters in length are widened in stages.
- DE-AS 22 64 207 discloses a suitable expander for this purpose. The actual expander head comprises a pyramidal polyhedron which has individual segments arranged on its surfaces. By displacing the polyhedron relative to the segments, these can be moved radially so that the diameter of the expander head increases or decreases.
- Another expander is known from U.S. Pat. No. 4,064,730, which document particularly concerns the guiding of the segments on the polyhedron.
- On account of the very high forces, high surface pressures occur in the guide tracks. This leads to a situation where only selected and expensive material pairings, for example hardened and ground cold-work steel on hardened and ground alloyed gray cast iron, can take up such surface pressures. In addition, the running surfaces have to be lubricated with a special oil in order to keep the wear within reasonable limits. The oil must be easy to wash off since it wets the pipes on the insides and has to be removed from them. Special oils of this kind are expensive, so that high production costs result from the wear on the tools and from these oil costs.
- It is therefore an object of the invention to make available a mechanical pipe expander in which the wear on the surfaces moving relative to each other can be reduced and in which the use of lubricating oil in these areas can be dispensed with.
- In a pipe expander of the generic type, this object is achieved by arranging a wear-resistant lining between the surfaces of the polyhedron and the segments.
- This wear lining is preferably made of a carbon fiber composite with a polymer matrix.
- Graphite powder is preferably added to the matrix, specifically in such an amount as to give a coefficient friction of between 0.10 and 0.15 for the wear-resistant lining.
- Such a wear lining can additionally also be arranged on the end faces of the segments.
- By using the wear-resistant lining according to the invention, not only is it possible to do without the expensive special oil for lubricating the sliding surfaces, but in addition comparatively less expensive materials can be used both for the segments and for the polyhedron. A further advantage of omitting the oil lubrication is that washing the pipes after expansion requires less outlay. Lastly, wear no longer occurs on the segments and on the polyhedron, so that only the wear-resistant linings themselves have to be replaced.
- Using the wear-resistant lining according to the invention has a final added advantage. If sets of wear linings of different thicknesses are kept available, the diameter range within which the mechanical pipe expander can be used can be substantially increased, without having to make changes to the segments or to the polyhedron itself.
- Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
- FIG. 1 shows a simplified longitudinal section through a pipe expander, and
- FIG. 2 shows a corresponding transverse section.
- The pipe expander1 has a polyhedron 2 (here a truncated pyramid having an octogonal cross-section) which can be axially displaced by means of a pull rod 6.
Segments 3 are arranged on the circumferential surfaces of the polyhedron. A wear-resistant lining 5 is in each case arranged between the opposing sliding surfaces of thesegments 3 and thepolyhedron 2. An additional wear-resistant lining 5 is also present on the end face of eachsegment 3. In order to hold the wear-resistant linings 5 in position, corresponding recesses can be provided on the underside of thesegments 3. As is known, by means of an axial displacement of thepolyhedron 2 relative to thesegments 3, these are moved radially outward so that in this way expansion of thepipe 4 is possible. - Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
Claims (6)
1. A mechanical pipe expander comprising
a pyramid polyhedron having a central axis and circumferential surfaces;
segments arranged on the circumferential surfaces of the polyhedron, which segments are moved radially by relative axial movement of the polyhedron; and
a wear-resistant lining between each of the circumferential surfaces and each respective segment.
2. The mechanical pipe expander as claimed in , wherein the wear-resistant lining is made of a carbon fiber composite, with a polymer matrix.
claim 1
3. The mechanical pipe expander as claimed in , wherein graphite powder is added to the matrix, in such an amount as to give a coefficient of friction between 0.10 and 0.15 for the wear lining.
claim 2
4. The mechanical pipe expander as claimed in , wherein the segments have axial end faces which are provided with the wear-resistant linings.
claim 1
5. The mechanical pipe expander as claimed in , wherein the pyramidal polyhedron is a truncated pyramid.
claim 1
6. The mechanical pipe expander as claimed in , wherein the polyhedron has an octogonal cross-section.
claim 1
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10008688.8 | 2000-02-18 | ||
DE10008688A DE10008688C1 (en) | 2000-02-18 | 2000-02-18 | Mechanical pipe expander has a lubricant cladding between the mantle surfaces of the multi-edge pyramid and the moving segments to reduce wear between moving surfaces without a lubricant oil |
Publications (1)
Publication Number | Publication Date |
---|---|
US20010020381A1 true US20010020381A1 (en) | 2001-09-13 |
Family
ID=7632256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/783,647 Abandoned US20010020381A1 (en) | 2000-02-18 | 2001-02-14 | Mechanical pipe expander |
Country Status (4)
Country | Link |
---|---|
US (1) | US20010020381A1 (en) |
EP (1) | EP1125654A3 (en) |
JP (1) | JP2001259763A (en) |
DE (1) | DE10008688C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040168796A1 (en) * | 2003-02-28 | 2004-09-02 | Baugh John L. | Compliant swage |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10147848A1 (en) * | 2001-08-13 | 2003-03-13 | Alcan Tech & Man Ag | Method and device for calibrating a profile or the like body |
DE10325974B3 (en) * | 2003-06-07 | 2004-10-21 | Daimlerchrysler Ag | Sealing support made from a fibrous material used in camshafts has a core made from axially running composite fibers and a sleeve made from peripherally running composite fibers |
DE102012013709B3 (en) * | 2012-07-11 | 2014-01-02 | Sms Meer Gmbh | Lubricating device for supplying a tool with lubricant |
CN103706676A (en) * | 2012-09-30 | 2014-04-09 | 天太·郭元焜 | Propping-open-type deformed orifice repairing machine |
CN103447399A (en) * | 2013-09-05 | 2013-12-18 | 无锡双友石化机械有限公司 | Oil way system of lubricating ring of hole enlarging head |
CN106536079A (en) * | 2014-07-18 | 2017-03-22 | 杰富意钢铁株式会社 | Pipe expander |
JP2018172879A (en) * | 2017-03-31 | 2018-11-08 | 新日鐵住金株式会社 | Subsoil reinforcing method and steel pipe for reinforcing subsoil |
DE102017217841A1 (en) * | 2017-10-06 | 2019-04-11 | Volkswagen Aktiengesellschaft | Tool for cold forming galvanized steel sheets and method for producing a tool for cold forming galvanized steel sheets |
DE102020213223A1 (en) | 2020-10-20 | 2022-04-21 | Sms Group Gmbh | Device for lubricating a mold and method for lubricating |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2246086A (en) * | 1940-01-08 | 1941-06-17 | Du Pont | Bearing |
US2828538A (en) * | 1956-11-15 | 1958-04-01 | American Welding Mfg Co | Unit process of sizing and flattening metal rings |
US3583200A (en) * | 1969-05-19 | 1971-06-08 | Grotnes Machine Works Inc | Expanding head and improved seal therefor |
US5506056A (en) * | 1989-05-12 | 1996-04-09 | Mitsui Petrochemical Industries, Ltd. | Thermoplastic resin composition and use thereof |
US5704244A (en) * | 1995-06-07 | 1998-01-06 | American National Can Company | Apparatus for reshaping a container |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2264207C2 (en) * | 1972-12-28 | 1974-08-01 | Mannesmann-Meer Ag, 4050 Moenchengladbach | Mechanical pipe expander with height adjustment of the tool head |
DE2611702C3 (en) * | 1976-03-18 | 1979-01-18 | Mannesmann Ag, 4000 Duesseldorf | Mechanical pipe expander |
US4212186A (en) * | 1978-10-25 | 1980-07-15 | Blattler Joseph F | Pipe expander |
DE2924437C2 (en) * | 1979-06-14 | 1981-11-26 | Mannesmann AG, 4000 Düsseldorf | Device for expanding and calibrating welded steel pipes |
DE3939356A1 (en) * | 1989-11-24 | 1991-05-29 | Mannesmann Ag | MECHANICAL TUBE EXPANDER |
AT396365B (en) * | 1991-01-28 | 1993-08-25 | Chemson Polymer Additive | ADDITIONAL FOR FRICTION COATING MIXTURES CONTAINING MANGANE-II SULFIDE |
-
2000
- 2000-02-18 DE DE10008688A patent/DE10008688C1/en not_active Expired - Lifetime
-
2001
- 2001-01-08 EP EP01250010A patent/EP1125654A3/en not_active Withdrawn
- 2001-02-14 US US09/783,647 patent/US20010020381A1/en not_active Abandoned
- 2001-02-16 JP JP2001039644A patent/JP2001259763A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2246086A (en) * | 1940-01-08 | 1941-06-17 | Du Pont | Bearing |
US2828538A (en) * | 1956-11-15 | 1958-04-01 | American Welding Mfg Co | Unit process of sizing and flattening metal rings |
US3583200A (en) * | 1969-05-19 | 1971-06-08 | Grotnes Machine Works Inc | Expanding head and improved seal therefor |
US5506056A (en) * | 1989-05-12 | 1996-04-09 | Mitsui Petrochemical Industries, Ltd. | Thermoplastic resin composition and use thereof |
US5704244A (en) * | 1995-06-07 | 1998-01-06 | American National Can Company | Apparatus for reshaping a container |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040168796A1 (en) * | 2003-02-28 | 2004-09-02 | Baugh John L. | Compliant swage |
US7128146B2 (en) | 2003-02-28 | 2006-10-31 | Baker Hughes Incorporated | Compliant swage |
Also Published As
Publication number | Publication date |
---|---|
EP1125654A3 (en) | 2001-12-12 |
JP2001259763A (en) | 2001-09-25 |
EP1125654A2 (en) | 2001-08-22 |
DE10008688C1 (en) | 2001-02-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SMS DEMAG AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOLBE, MANFRED;TOPUTH, ARNO;HAUSLER, KARL HEINZ;REEL/FRAME:011720/0344;SIGNING DATES FROM 20010322 TO 20010326 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |