EP2252793A1 - Method and blank for manufacturing product, and product - Google Patents

Method and blank for manufacturing product, and product

Info

Publication number
EP2252793A1
EP2252793A1 EP09710491A EP09710491A EP2252793A1 EP 2252793 A1 EP2252793 A1 EP 2252793A1 EP 09710491 A EP09710491 A EP 09710491A EP 09710491 A EP09710491 A EP 09710491A EP 2252793 A1 EP2252793 A1 EP 2252793A1
Authority
EP
European Patent Office
Prior art keywords
rod
section
ring
blank
shaped cross
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.)
Withdrawn
Application number
EP09710491A
Other languages
German (de)
French (fr)
Other versions
EP2252793A4 (en
Inventor
Björn KRISTENSEN
Roar Edvartsen
Orjan Bjoru
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rautaruukki Oyj
Original Assignee
Rautaruukki Oyj
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rautaruukki Oyj filed Critical Rautaruukki Oyj
Publication of EP2252793A1 publication Critical patent/EP2252793A1/en
Publication of EP2252793A4 publication Critical patent/EP2252793A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/02—Detachable connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/30—Arrangement of components
    • F05B2250/33—Arrangement of components symmetrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/70—Shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to a method according to the preamble of claim 1 , and especially to a method for manufacturing a flange ring of a wind power plant with an L-shaped cross-section, in which method the flange ring is manufactured by bending from a straight rod with a right-angled cross-section first a ring blank and then machining the cross-section of the ring blank to the L-shape.
  • the invention also relates to a product manufactured with the method and to a blank according to the preamble of claim 12 for forming a flange ring of a wind power plant with an L-shaped cross-section.
  • flange rings of wind power plants with an L-shaped cross-section are manufactured in such a manner that first a straight rod having a right-angled cross-section is bent in the shape of a ring and then its cross-section is milled into the L-shape.
  • a rod with an already L-shaped cross-section is bent into a ring.
  • the rod, from which the flange ring is manufactured, is generally made by rolling.
  • a problem with the above arrangement is that such flange rings of wind power plant frames, whose cross-sections are L-shaped, must be manufactured extremely accurately, because they are large in diameter, even 4 m or more, whereby even small inaccuracies may lead to large deviations in the frame of the wind power plant and thus also to structural problems.
  • To bend a rod with an L-shaped cross-section into a flange ring is not advantageous, because the asymmetry of the rod leads to problems and inaccuracies in the bending process, whereby the accuracy of the obtained final product does not meet the requirements set for a flange ring of a wind power plant.
  • the object of the invention is achieved by a method according to the characterizing part of claim 1 , the method being characterized in that, prior to bending the rod into a ring blank, the cross-section of the straight rod is made into a U shape.
  • the object of the invention is also achieved with the product of claim 11.
  • the object of the invention may further be achieved with a blank according to the characterizing part of claim 12, the blank comprising a rod with a symmetric U-shaped cross- section.
  • the invention is based on manufacturing the flange ring of the frame of a wind power plant from a straight rod-like piece, on one surface of which a groove is made in such a manner that the cross-section of the piece is essentially U-shaped.
  • a groove is formed in the rod-like piece, or a U-shaped cross-section is in some other manner produced to it before the rod-like piece is bent into a ring.
  • the manufacture of the flange ring of a wind power plant is then started from a rod-like piece having a cross-section in the shape of a symmetric U.
  • An advantage of the method and system of the invention is that it is possible to bend a piece having a symmetric cross-sectional form extremely exactly.
  • the groove of the rod-like piece or its U-shaped cross-section provides to the rod-like piece rigidity that enables its exact bending, whereby the quality of the final product is better.
  • Figure 1A shows a rod blank for the manufacturing of a flange ring for a wind power plant
  • Figure 1 B shows a ring blank for the manufacturing of a flange ring for a wind power plant
  • Figure 1C shows the cross-section of the ring blank of Figure 1 B
  • Figures 2A and 2B show a flange ring of a wind power plant
  • Figures 3A and 3B show another flange ring of a wind power plant.
  • Figure 1A shows a rod 1 or rod blank from which a flange ring of a wind power plant is manufactured.
  • the rod 1 is made from steel by rolling, for instance.
  • a groove 2 is made into the rod 1 so that the rod 1 has an essentially U-shaped cross-section.
  • the groove 2 may be done by rolling, for instance when the rod 1 is rolled, milling or using some other corresponding machining method.
  • the U-shaped cross-section of the rod 1 not only comprises the groove 2, but also two edge parts 4 and 6 that form the side walls of the U shape.
  • the groove 2 may be provided into the rod 1 before or after it is cut.
  • the rod 1 cut into the desired length is then bent into a circular ring for the manufacturing of a ring blank 8 according to Figure 1 B.
  • the rod 1 is bent in such a manner that the groove 2 settles on the top surface of the ring blank 8 as shown in Figure 1B, or alternatively on the bottom surface.
  • the edge part 6 forms the inner edge part of the U shape of the ring blank 8 and the edge part 4 forms the outer edge part of the U shape of the ring blank 8.
  • the ends of the rod 1 may be joined or fastened together, if necessary.
  • the fastening may be done by welding, for example, or mechanically or using some other alternative method.
  • Figure 1C shows a partial cross-section of the ring blank 8 and an enlargement of the cross-section of the rod 1 formed by the ring blank 8.
  • the rod 1 forming the ring blank 8 has the same cross-section as the rod 1 in Figure 1A.
  • the rod 1 forming the ring blank 8 comprises a symmetric groove 2 or a symmetric U-shaped cross- section in the vertical direction of Figure 1C.
  • the groove 2 comprises a bottom 14 and two edge parts 4, 6 that form the side walls of the U shape.
  • the rod 1 comprising an essentially U-shaped cross- section serves as a primary blank or rod blank for producing the flange ring of a wind power plant.
  • the ring blank 8 bent of the rod 1 serves as a secondary blank for producing the flange ring of the frame of a wind power plant.
  • a flange ring of a wind power plant with an L-shaped cross- section is further manufactured from the ring blank 8.
  • Figure 2A shows a flange ring 9 of the frame of a wind power plant having an L-shaped cross-section.
  • material is removed from the ring blank 8 by milling, for example.
  • the rod 1 forming the ring blank 8 has a U- shaped cross-section
  • the L-shaped cross-section is produced by machining away one of the edge parts 4, 6 of the groove 2.
  • the flange ring 9 of Figure 2A is produced by removing the outer edge part 4 of the rod 1 of the ring blank 8 when machining the ring blank.
  • the edge part 4 may be removed by milling, for example.
  • a flange ring 9 is produced, in which the rod 1 forming the flange ring has an L-shaped cross-section.
  • the flange ring 9 rod then has a cross-section or profile in which the vertical branch 6 of the L extends on the inner circumference of the flange ring 9.
  • Figure 2B shows a partial cross-section of the flange ring 9 of Figure 2A and an enlargement of the rod 1 forming the flange ring 9.
  • the machined rod 1 forming flange ring 9 has an L- shaped cross-section.
  • the L-shaped cross-section is, as stated above, produced by machining away the outer edge part 4 from the rod 1.
  • the flange ring 9 is produced by machining away the edge part 4 from the rod 1 of the flange blank 8 only until the level of the bottom 14 of the groove 2.
  • the rod 1 of the ring blank 8 may also be machined in such a manner that, in addition to the edge part 4, material is also removed from the bottom 14 of the groove 2.
  • FIG 3A shows an alternative embodiment for the flange ring 9 of the frame of a wind power plant, obtained according to the invention from a ring blank 8.
  • the ring blank 8 is machined in such a manner that the inner edge part 6 of the U shape is machined away from the rod 1 of the ring blank 8.
  • the ring blank 8 may be machined in such a manner that material is also removed from the bottom 14 of the groove 2 and/or even from the outer edge part 4, for instance from its top surface and/or the surface opposite the edge part 4 in such a manner, however, that the rod of the flange ring 9 obtains an L-shaped cross-section.
  • the rod of the flange ring 9 obtains an L-shaped cross-section.
  • a ring blank 8 that comprises in its centre a groove 2 extending symmetrically in the longitudinal direction of the ring blank 8 rod.
  • a rod blank 1 with an essentially U-shaped cross-section or profile is produced from the rod before the rod is bent into a ring to form the ring blank 8.
  • the ring blank 8 then need not be machined as much as a rod with a right- angled cross-section, and a symmetric rod with a groove can be bent more exactly into the shape of a circle, whereby a better-quality flange ring is obtained.

Abstract

The invention relates to a method for manufacturing a flange ring (9) of a wind power plant having an L-shaped cross-section, in which method the flange ring (9) is manufactured by bending from a straight rod (1) with a right-angled cross-section first a ring blank (8) and then machining the cross-section of the ring blank (8) into the L shape. In the invention, before the rod (1) is bent into the ring blank (8), on one surface of the straight rod (1), a groove (2) extending in the longitudinal direction of the rod is formed to provide an essentially U-shaped cross-section for the rod (1).

Description

METHOD AND BLANK FOR MANUFACTURING PRODUCT, AND PRODUCT
BACKGROUND OF THE INVENTION
[0001] The invention relates to a method according to the preamble of claim 1 , and especially to a method for manufacturing a flange ring of a wind power plant with an L-shaped cross-section, in which method the flange ring is manufactured by bending from a straight rod with a right-angled cross-section first a ring blank and then machining the cross-section of the ring blank to the L-shape. The invention also relates to a product manufactured with the method and to a blank according to the preamble of claim 12 for forming a flange ring of a wind power plant with an L-shaped cross-section.
[0002] According to the prior art, flange rings of wind power plants with an L-shaped cross-section are manufactured in such a manner that first a straight rod having a right-angled cross-section is bent in the shape of a ring and then its cross-section is milled into the L-shape. Alternatively, a rod with an already L-shaped cross-section is bent into a ring. The rod, from which the flange ring is manufactured, is generally made by rolling.
[0003] A problem with the above arrangement is that such flange rings of wind power plant frames, whose cross-sections are L-shaped, must be manufactured extremely accurately, because they are large in diameter, even 4 m or more, whereby even small inaccuracies may lead to large deviations in the frame of the wind power plant and thus also to structural problems. To bend a rod with an L-shaped cross-section into a flange ring is not advantageous, because the asymmetry of the rod leads to problems and inaccuracies in the bending process, whereby the accuracy of the obtained final product does not meet the requirements set for a flange ring of a wind power plant. On the other hand, when a rod with a right-angled cross-section is first bent into a ring, it then needs to be milled in such a manner that the cross-section of the rod forming the ring is L-shaped. The milling of such very large rings is a slow and extremely expensive work phase and thus forms a bottleneck in the industrial production of flange rings. In addition, since the rods, from which the flange rings are manufactured, are made by rolling, midline porosity is formed in the right-angled rod during rolling. Midline porosity refers to porosity formed in the midline of the rolled piece. When a flange ring with midline porosity is milled into the L shape, milling also needs to be done at this midline porosity, which reduces the exactness and strength of the flange ring. This type of rod with an L-shaped cross-section is often achieved from a triangular blank whose asymmetric form requires support from three directions, but even this does not always guarantee a good-quality final product.
BRIEF DESCRIPTION OF THE INVENTION
[0004] It is thus an object of the invention to develop a method, product, and blank for a flange ring of a wind power plant in such a manner that the above-mentioned problems can be solved. The object of the invention is achieved by a method according to the characterizing part of claim 1 , the method being characterized in that, prior to bending the rod into a ring blank, the cross-section of the straight rod is made into a U shape. The object of the invention is also achieved with the product of claim 11. The object of the invention may further be achieved with a blank according to the characterizing part of claim 12, the blank comprising a rod with a symmetric U-shaped cross- section.
[0005] Preferred embodiments of the invention are disclosed in the dependent claims.
[0006] The invention is based on manufacturing the flange ring of the frame of a wind power plant from a straight rod-like piece, on one surface of which a groove is made in such a manner that the cross-section of the piece is essentially U-shaped. In other words, a groove is formed in the rod-like piece, or a U-shaped cross-section is in some other manner produced to it before the rod-like piece is bent into a ring. The manufacture of the flange ring of a wind power plant is then started from a rod-like piece having a cross-section in the shape of a symmetric U.
[0007] An advantage of the method and system of the invention is that it is possible to bend a piece having a symmetric cross-sectional form extremely exactly. In addition, the groove of the rod-like piece or its U-shaped cross-section provides to the rod-like piece rigidity that enables its exact bending, whereby the quality of the final product is better. In addition, it is not necessary to mill or otherwise machine so much material away from a ring blank made of a rod with a U-shaped cross-section as from a ring blank made of a rod with a right-angled cross-section to obtain an L-shaped cross-section. In addition, in the case of a U-shaped cross-section, the milling of the ring blank is not directed to the midline porosity, because its position in a rod-like rolled piece has changed due to the U-shaped cross-section. Another advantage of the present invention is that it is possible to easily and efficiently manufacture various L-shaped cross-sections for a flange ring from one type of rod-like piece.
BRIEF DESCRIPTION OF FIGURES
[0008] The invention will now be described in more detail by means of preferred embodiments and with reference to the attached drawings, in which
Figure 1A shows a rod blank for the manufacturing of a flange ring for a wind power plant,
Figure 1 B shows a ring blank for the manufacturing of a flange ring for a wind power plant,
Figure 1C shows the cross-section of the ring blank of Figure 1 B, Figures 2A and 2B show a flange ring of a wind power plant, and Figures 3A and 3B show another flange ring of a wind power plant.
DETAILED DESCRIPTION OF THE INVENTION
[0009] Figure 1A shows a rod 1 or rod blank from which a flange ring of a wind power plant is manufactured. The rod 1 is made from steel by rolling, for instance. A groove 2 is made into the rod 1 so that the rod 1 has an essentially U-shaped cross-section. The groove 2 may be done by rolling, for instance when the rod 1 is rolled, milling or using some other corresponding machining method. The U-shaped cross-section of the rod 1 not only comprises the groove 2, but also two edge parts 4 and 6 that form the side walls of the U shape. After the rod 1 is manufactured, it is cut into the desired length for the manufacturing of a ring blank 8 with a desired diameter. However, it should be noted that the groove 2 may be provided into the rod 1 before or after it is cut.
[0010] The rod 1 cut into the desired length is then bent into a circular ring for the manufacturing of a ring blank 8 according to Figure 1 B. The rod 1 is bent in such a manner that the groove 2 settles on the top surface of the ring blank 8 as shown in Figure 1B, or alternatively on the bottom surface. In the case of Figure 1 B, the edge part 6 forms the inner edge part of the U shape of the ring blank 8 and the edge part 4 forms the outer edge part of the U shape of the ring blank 8. As the rod 1 is bent into a ring, the ends of the rod 1 may be joined or fastened together, if necessary. The fastening may be done by welding, for example, or mechanically or using some other alternative method.
[0011] Figure 1C shows a partial cross-section of the ring blank 8 and an enlargement of the cross-section of the rod 1 formed by the ring blank 8. According to Figure 1C, the rod 1 forming the ring blank 8 has the same cross-section as the rod 1 in Figure 1A. In other words, the rod 1 forming the ring blank 8 comprises a symmetric groove 2 or a symmetric U-shaped cross- section in the vertical direction of Figure 1C. The groove 2 comprises a bottom 14 and two edge parts 4, 6 that form the side walls of the U shape. According to what is stated above, the rod 1 comprising an essentially U-shaped cross- section serves as a primary blank or rod blank for producing the flange ring of a wind power plant. Correspondingly, the ring blank 8 bent of the rod 1 serves as a secondary blank for producing the flange ring of the frame of a wind power plant.
[0012] A flange ring of a wind power plant with an L-shaped cross- section is further manufactured from the ring blank 8. Figure 2A shows a flange ring 9 of the frame of a wind power plant having an L-shaped cross-section. To produce the L-shaped cross-section, material is removed from the ring blank 8 by milling, for example. Because the rod 1 forming the ring blank 8 has a U- shaped cross-section, the L-shaped cross-section is produced by machining away one of the edge parts 4, 6 of the groove 2. The flange ring 9 of Figure 2A is produced by removing the outer edge part 4 of the rod 1 of the ring blank 8 when machining the ring blank. The edge part 4 may be removed by milling, for example. In other words, by machining away the outer edge part 4 of the U shape of the ring blank 8, a flange ring 9 is produced, in which the rod 1 forming the flange ring has an L-shaped cross-section. The flange ring 9 rod then has a cross-section or profile in which the vertical branch 6 of the L extends on the inner circumference of the flange ring 9.
[0013] Figure 2B shows a partial cross-section of the flange ring 9 of Figure 2A and an enlargement of the rod 1 forming the flange ring 9. According to Figure 2B, the machined rod 1 forming flange ring 9 has an L- shaped cross-section. In this embodiment, the L-shaped cross-section is, as stated above, produced by machining away the outer edge part 4 from the rod 1. In the solution of Figure 2B, the flange ring 9 is produced by machining away the edge part 4 from the rod 1 of the flange blank 8 only until the level of the bottom 14 of the groove 2. Alternatively, the rod 1 of the ring blank 8 may also be machined in such a manner that, in addition to the edge part 4, material is also removed from the bottom 14 of the groove 2. Alternatively, it is also possible to remove material from the inner edge part 6, for instance from its top surface and/or from the surface facing the edge part 4 in such a manner, however, that the rod of the flange ring 9 obtains an L-shaped cross-section.
[0014] Figure 3A shows an alternative embodiment for the flange ring 9 of the frame of a wind power plant, obtained according to the invention from a ring blank 8. In this embodiment, the ring blank 8 is machined in such a manner that the inner edge part 6 of the U shape is machined away from the rod 1 of the ring blank 8. This produces the flange ring 9 of Figure 3B, in which the rod 1 forming it has an L-shaped cross-section where the vertical leg 4 of the L extends on the outer circumference of the flange ring. In this embodiment, too, the ring blank 8 may be machined in such a manner that material is also removed from the bottom 14 of the groove 2 and/or even from the outer edge part 4, for instance from its top surface and/or the surface opposite the edge part 4 in such a manner, however, that the rod of the flange ring 9 obtains an L-shaped cross-section. Thus, it is possible to provide a desired L profile for the flange ring 9.
[0015] As stated above, it is essential for the present invention that a ring blank 8 is provided that comprises in its centre a groove 2 extending symmetrically in the longitudinal direction of the ring blank 8 rod. In other words, a rod blank 1 with an essentially U-shaped cross-section or profile is produced from the rod before the rod is bent into a ring to form the ring blank 8. The ring blank 8 then need not be machined as much as a rod with a right- angled cross-section, and a symmetric rod with a groove can be bent more exactly into the shape of a circle, whereby a better-quality flange ring is obtained. Further, it is possible to manufacture from the ring blank 8 different flange rings 9 having an L-shaped profile as needed at each time, and the midline porosity point created during rolling need not be milled or otherwise machined.
[0016] It is obvious to a person skilled in the art that, as technology advances, the basic idea of the invention may be implemented in many different ways. The invention and its embodiments are then not limited to the above examples, but may vary within the scope of the claims.

Claims

1. A method for manufacturing a flange ring (9) of a wind power plant with an L-shaped cross-section, in which method the flange ring (9) is manufactured by bending from a straight rod (1) with a right-angled cross- section first a ring blank (8) and then by machining the cross-section of the ring blank (8) into the L shape, characterised by, before bending the rod (1 ) into the ring blank (8), providing an essentially U-shaped cross-section for the straight rod (1).
2. A method as claimed in claim ^ characterised by providing the U-shaped cross-section by rolling into the rod (1) a groove (2) that extends in the longitudinal direction of the rod or by rolling the cross-section of the rod (1 ) into the U shape.
3. A method as claimed in claim 1, characterised by providing the U-shaped cross-section by milling or using some other corresponding machining method into the rod (1) a groove that extends in the longitudinal direction of the rod, or by milling or otherwise machining the cross-section of the rod (1 ) into the U shape.
4. A method as claimed in any one of the preceding claims 1 to 3, characterised by providing the U-shaped cross-section or groove (2) into the rod (1) symmetrically in such a manner that it extends in the middle section of the rod.
5. A method as claimed in any one of the preceding claims 1 to 4, characterised by machining the U-shaped cross-section of the ring blank (8) into the L shape for the purpose of forming a flange ring (9).
6. A method as claimed in claim 5, characterised by machining the U-shaped cross-section of the ring blank (8) into the L shape by milling, turning, or using some other corresponding machining method.
7. A method as claimed in claim 5 or 6, characterised by machining the ring blank (8) in such a manner that the inner edge part (6) or outer edge part (4) of the U-shaped cross-section of the ring blank (8) is removed to obtain the L-shaped cross-section.
8. A method as claimed in claim 7, characterised by machining the ring blank (8) in such a manner that material is removed from the bottom (14) of the groove (2) during the machining of the ring blank (8).
9. A method as claimed in any one of the preceding claims 1 to 8, characterised by cutting the rod (1 ) into the required length before it is bent into the ring blank (8).
10. A method as claimed in any one of the preceding claims 1 to 9, characterised by joining the ends of the rod (1 ) together when the rod is bent into the ring blank (8).
11. A flange ring (9) of a wind power plant with an L-shaped cross- section and made using the method of any one of claims 1 to 10.
12. A blank (8) for forming a flange ring (9) of a wind power plant with an L-shaped cross-section, characterised in that the blank (8) consists of a rod (1) with a symmetric U-shaped cross-section.
13. A blank (8) as claimed in claim 12, characterised in that the rod (1) is bent into a circular ring for the purpose of forming a ring blank (8) for a flange ring (9) of a wind power plant.
14. A blank (8) as claimed in claim 12 or 13, characterised in that the U-shaped cross-section of the rod (1) is provided by rolling, milling, or using some other corresponding machining method before bending the rod into a ring.
15. A blank (8) as claimed in any one of the preceding claims 12 to 14, characterised in that the ends of the rod (1 ) bent into a ring are joined together.
EP09710491.3A 2008-02-14 2009-02-10 Method and blank for manufacturing product, and product Withdrawn EP2252793A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20085131A FI20085131L (en) 2008-02-14 2008-02-14 Method and blank for making the product and the product
PCT/FI2009/050102 WO2009101250A1 (en) 2008-02-14 2009-02-10 Method and blank for manufacturing product, and product

Publications (2)

Publication Number Publication Date
EP2252793A1 true EP2252793A1 (en) 2010-11-24
EP2252793A4 EP2252793A4 (en) 2014-02-12

Family

ID=39149001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09710491.3A Withdrawn EP2252793A4 (en) 2008-02-14 2009-02-10 Method and blank for manufacturing product, and product

Country Status (3)

Country Link
EP (1) EP2252793A4 (en)
FI (1) FI20085131L (en)
WO (1) WO2009101250A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191214005A (en) * 1911-06-30 1913-05-29 Johann Puppe Improvements in the Rolling of Bars or Girders of I, H, U, or like Section.
GB1138860A (en) * 1966-04-16 1969-01-01 Ralph Gordon Smith Improvements in the bending of structural members
DE10126049A1 (en) * 2001-03-23 2002-12-05 Aloys Wobben Flange connection, for the erection of tubular wind energy tower segments, has a conical outer wall of the flange tubular section to mate with a matching conical component to reduce damage through cracks and fatigues
US20060163874A1 (en) * 2003-06-02 2006-07-27 Aloys Wobben Method for the production of a connection flange
US20070122601A1 (en) * 2005-11-28 2007-05-31 Martin Gary S Steel composition, articles prepared there from, and uses thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2540713B2 (en) * 1975-09-12 1981-06-04 G. Siempelkamp Gmbh & Co, 4150 Krefeld Method of making a seamless pipe flange molding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191214005A (en) * 1911-06-30 1913-05-29 Johann Puppe Improvements in the Rolling of Bars or Girders of I, H, U, or like Section.
GB1138860A (en) * 1966-04-16 1969-01-01 Ralph Gordon Smith Improvements in the bending of structural members
DE10126049A1 (en) * 2001-03-23 2002-12-05 Aloys Wobben Flange connection, for the erection of tubular wind energy tower segments, has a conical outer wall of the flange tubular section to mate with a matching conical component to reduce damage through cracks and fatigues
US20060163874A1 (en) * 2003-06-02 2006-07-27 Aloys Wobben Method for the production of a connection flange
US20070122601A1 (en) * 2005-11-28 2007-05-31 Martin Gary S Steel composition, articles prepared there from, and uses thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2009101250A1 *

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