EP2484461A1 - Bent member and method for manufacturing same - Google Patents

Bent member and method for manufacturing same Download PDF

Info

Publication number
EP2484461A1
EP2484461A1 EP10820735A EP10820735A EP2484461A1 EP 2484461 A1 EP2484461 A1 EP 2484461A1 EP 10820735 A EP10820735 A EP 10820735A EP 10820735 A EP10820735 A EP 10820735A EP 2484461 A1 EP2484461 A1 EP 2484461A1
Authority
EP
European Patent Office
Prior art keywords
curved
forming
present
cracks
good
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.)
Granted
Application number
EP10820735A
Other languages
German (de)
French (fr)
Other versions
EP2484461A4 (en
EP2484461B1 (en
Inventor
Takayuki Futatsuka
Kazuhiko Higai
Yoshikiyo Tamai
Takaaki Hira
Takeshi Fujita
Yuji Yamasaki
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.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
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 JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP2484461A1 publication Critical patent/EP2484461A1/en
Publication of EP2484461A4 publication Critical patent/EP2484461A4/en
Application granted granted Critical
Publication of EP2484461B1 publication Critical patent/EP2484461B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
    • 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
    • B21C37/14—Making tubes from double flat material
    • 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
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0439—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the cross-section comprising open parts and hollow parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0465—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section square- or rectangular-shaped
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12229—Intermediate article [e.g., blank, etc.]

Definitions

  • the present invention relates to a method of forming plates into curved parts (more specifically, curved frame parts). More particularly, the present invention relates to a forming method that makes it possible to form high-strength steel sheets having a tensile strength (TS) that is greater than or equal to 590 MPa into curved parts, curved parts, and a method for manufacturing the same.
  • TS tensile strength
  • Curved parts have hitherto been obtained by press forming single metal plates.
  • various forming modes including drawing, stretch forming, stretch flanging, and bending are combined.
  • the press forming will hereunder be referred to as "conventional press forming."
  • a method of bending forming a cylindrical material (PTL 1), a roll forming technology (PTL 2), and bending forming using a hollow part (PTL 3 and PTL 4) are proposed.
  • a method of filling with resin foam (PTL 5) is proposed.
  • TS tensile strength
  • wrinkles occur in a planar section (such as a wrinkle section in Fig. 11 ), and cracks occur in a vertical wall at a side surface or in flanges (such as a crack section in Fig. 11 ).
  • TS tensile strength
  • TS tensile strength
  • a method of obtaining high-strength curved parts by performing bending forming or roll forming on cylindrical materials is disclosed (PTL 1 to PTL 4).
  • PTL 1 to PTL 4 A method of obtaining high-strength curved parts by performing bending forming or roll forming on cylindrical materials.
  • PTL 5 A method of obtaining reinforcing effects by filling with resin foam.
  • the present invention for solving the aforementioned problems provides the following:
  • the material is bent and deformed almost without being variously deformed by drawing, stretch forming, and stretch flanging, it is possible to perform one-piece pressing forming of a single high-strength steel sheet into portions of the curved part.
  • the shape of the curved part which is a target to be formed, being reflected in the outline of the blank, it is possible to expect easy obtainment of parts having high strength and having a complex curved shape that could not be hitherto obtained, enlargement of space due to a reduction in the cross section of the parts, and a large reduction in weight because, for example, plate thickness is reduced and reinforcing parts are not used.
  • Figs. 1 to 8 are schematic views of different embodiments of the present invention.
  • Figs. 1 and 2 each show an exemplary case in which a curve of a curved part 30 in a longitudinal direction is along folding lines in only one of two opposite directions.
  • the sectional size is constant in the longitudinal direction of the part, and, in Fig. 2 , the sectional size changes in the longitudinal direction of the part.
  • Figs. 3 and 4 each show an exemplary case in which a curve of a curved part 30 in the longitudinal direction along folding lines changes from either one of two opposite directions to the other one of the two opposite directions.
  • the sectional size is constant in the longitudinal direction of the part, and, in Fig.
  • the sectional size changes in the longitudinal direction of the part.
  • Figs. 5, 6 , 7, and 8 each show an exemplary case in which a curve of a curved part 30 in the longitudinal direction is such that the curved part 30 is continuously curved in only one of two opposite directions ( Figs. 7 and 8 each show an exemplary case in which the curved part has a warped sectional shape in the longitudinal direction).
  • the sectional size is constant in the longitudinal direction of the part
  • Figs. 6 , 7, and 8 the sectional size changes in the longitudinal direction of the part.
  • two blanks 1 and 2 have the same planar shape, and the planar shape thereof has a side-bend outline corresponding to the curve of the curved part 30, which is a target to be formed, in the longitudinal direction of the curved part 30.
  • the blanks 1 and 2 may be previously provided with working holes or beads, etc.
  • the blanks 1 and 2 are each bent into a sectional shape corresponding to a division portion of a sectional shape of the curved part 30, so that portions 10 and 20 constituting the curved part 30 are formed.
  • Reference numerals 1F and 2F denote portions corresponding to flanges of the blanks 1 and 2, or denote the flanges of the portions 10 and 20. In Figs.
  • broken lines and dotted lines that are formed in regions of the shapes of the blanks 1 and 2 represent mountain folding and valley folding, respectively, and indicate places corresponding to bend portions (protrusion edges and recess edges) formed by bending in the bending process.
  • the blanks are press bended so that forming portions of the blanks become bend portions that are in correspondence with target parts.
  • forming materials primarily undergo deformation of bending forming, and are formed into target shapes.
  • Joining methods may be any one of, for example, welding, caulking, riveting, and adhesion using an adhesive.
  • Joining methods may be any one of, for example, welding, caulking, riveting, and adhesion using an adhesive.
  • the embodiments shown in Figs. 1 to 6 are those in which the blanks are formed into a part sectional shape shown in Fig. 9(a)
  • the present invention is not limited thereto. It is obvious that the present invention is applicable to cases in which, for example, as shown in Fig. 9(b) , the blanks are formed into a part sectional shape that is the reverse of that in Fig. 9(a) at the left and right sides; or, as shown in Fig.
  • the blanks are formed into a part sectional shape so that the flanges 2F of only the structural portion 20 are bent.
  • the embodiments shown in Figs. 7 and 8 are those in which the blanks are formed into a part sectional shape shown in Fig. 9(d) .
  • the present invention is not limited thereto. It is obvious that the present invention is applicable to a case in which three or more blanks are used for one curved part, with at least one of the blanks having a planar shape that differs from the planar shapes of the remaining blanks. Further, in the present invention, in order to increase position precision of the bend portions during the bending, it is desirable to previously provide folding lines in portions of the blanks where the mountain folding and the valley folding are performed. The present invention is not only limited to (continuously) forming the folding lines along an entire bending processing portion.
  • the folding lines may be (intermittently) formed in only portions of the bending processing portion according to the circumstances.
  • a method of forming the folding lines it is desirable to use, for example, coining.
  • Another example thereof is a method of continuously transferring the unevenness of a roller surface to surfaces of the materials.
  • Suitable forms of folding lines may be provided by forming V grooves, such as that shown in Fig. 10(d) , in a linear form (10(a)), a broken-line form (10(b)), or a dotted-line form (10(c)), or in a combination of any of these forms.
  • the depth of the V grooves be less than or equal to 20% of the thickness of a metal plate (abbreviated as "plate thickness").
  • the depth of the V grooves exceeds 20% of the plate thickness, the strength of the parts required for, for example, the frame of an automobile may be reduced, or cracks may be formed in the bend portions; and, in a high-strength metal material, it is not easy to form the grooves deeply, thereby causing serious production and cost problems.
  • the shape of the grooves is not limited to a V shape (the grooves are not limited to the V groove shown in Fig. 10(d) ), so that the grooves may have various recessed shapes such as U shapes.
  • the curvature radius of the bend portions is large, a plurality of long and narrow grooves may be formed parallel to each other.
  • Blanks formed of thin steel sheets (material symbols A, B, and C) having plate thicknesses and tensile properties (yield strength YS, tensile strength TS, elongation El) shown in Table 1 were formed into curved parts by forming methods based on Table 2, and the shapes of the obtained curved parts were visually observed, to evaluate the forming methods. The results are as shown in Table 2.
  • Yield strength YS, tensile strength TS, elongation El tensile properties shown in Table 1
  • V grooves (whose depths are shown in Table 3) in a linear form, a broken-line form, or a dotted-line form, such as those shown in Fig. 10 , were previously formed in blanks formed of thin steel sheets (material symbols A, B, and C) having plate thicknesses and tensile properties (yield strength YS, tensile strength TS, extension El) shown in Table 1. Then, the blanks were formed into curved parts using forming methods based on Table 3, and the shapes of the obtained curved parts were visually observed, to evaluate the forming methods. The results are as shown in Table 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

A curved-part forming method includes a bending process in which blanks 1 and 2 having a curved outline corresponding to a curve of a curved part 30 in a longitudinal direction is bent into a sectional shape corresponding to a division portion of a sectional shape of the curved part, and a joining process in which two (or three of more) portions 10 and 20 obtained by the bending process are joined together. In a conventional forming method, when single high-strength steel sheets are used are materials, forming into desired curved parts cannot be achieved by one-piece press forming; or, when single low-strength steel sheets are used as materials, forming into curved parts can be achieved, but the parts lack strength. Therefore, the parts have insufficient strength, as a result of which weight is increased due to an increase in the number of reinforcing parts.

Description

    [Technical Field]
  • The present invention relates to a method of forming plates into curved parts (more specifically, curved frame parts). More particularly, the present invention relates to a forming method that makes it possible to form high-strength steel sheets having a tensile strength (TS) that is greater than or equal to 590 MPa into curved parts, curved parts, and a method for manufacturing the same.
    • [Background Art]
  • Curved parts have hitherto been obtained by press forming single metal plates. In the press forming, various forming modes including drawing, stretch forming, stretch flanging, and bending are combined. (The press forming will hereunder be referred to as "conventional press forming.") Further, a method of bending forming a cylindrical material (PTL 1), a roll forming technology (PTL 2), and bending forming using a hollow part (PTL 3 and PTL 4) are proposed. As an example of reinforcing curved parts, a method of filling with resin foam (PTL 5) is proposed.
    • [Citation List] [Patent Literature]
    • PTL 1: Japanese Unexamined Patent Application Publication No. 9-30345
    • PTL 2: Japanese Unexamined Patent Application Publication No. 11-129045
    • PTL 3: Japanese Unexamined Patent Application Publication No. 8-174047
    • PTL 4: Japanese Unexamined Patent Application Publication No. 2005-1490
    • PTL 5: Japanese Unexamined Patent Application Publication No. 11-348813
    [Summary of Invention] [Technical Problem]
  • Increasing the strength of a steel sheet in accordance with the demand for reducing weight causes at the same time a reduction in drawing ability, stretch forming ability, and stretch flanging ability on the steel sheet. Therefore, in conventional pressing forming, defects, such as cracks or wrinkles, occur. In particular, as the shape becomes complex, there are cases where curved parts cannot obtained. For example, if portions 50A and 50B (which are curved in an X direction and a Y direction in plan view, and in a Z direction) of a curved part 50 shown in Fig. 11 is formed by performing conventional press forming on a single high-strength steel sheet having a tensile strength (TS) that is greater than or equal to 590 MPa, wrinkles occur in a planar section (such as a wrinkle section in Fig. 11), and cracks occur in a vertical wall at a side surface or in flanges (such as a crack section in Fig. 11). Here, it is possible to suppress the occurrence of cracks/wrinkles up to a certain extent by changing the shapes of parts or optimizing forming conditions of, for example, a blank holder. However, in such a method, in order to satisfy the need of reducing weight, there is a limit with regard to achieving a higher tensile strength (TS) that is greater than 980 MPa.
  • A method of obtaining high-strength curved parts by performing bending forming or roll forming on cylindrical materials is disclosed (PTL 1 to PTL 4). From the viewpoints of formability of the materials and process constraints, it is difficult of obtain complex curved shapes, and there are serious productivity problems such as an increase in the number of processes. For example, when low-strength materials are used, complex shapes can be easily obtained, but parts have insufficient strength. Therefore, there are, for example, technologies for obtaining reinforcing effects by filling with resin foam (PTL 5). However, from the viewpoints of costs, production, and recycling, it is actually not easy to say that such technologies are necessarily useful technologies.
  • That is, in conventional forming methods, when single high-strength steel sheets are used as materials, forming into desired curved parts cannot be performed by one-piece press forming, or, when single low-strength steel sheets are used as materials, forming into curved parts can be performed, but the parts have insufficient strength, thereby making it necessary to, for example, increase the number of reinforcing pats, as a result of which weight is increased.
    • [Solution to Problem]
  • The present invention for solving the aforementioned problems provides the following:
    1. (1) A curved-part forming method for obtaining a curved part by performing forming on a blank formed of a single metal plate. The method includes a bending process in which the blank having a curved outline corresponding to a curve of the curved part in a longitudinal direction is bent into a sectional shape corresponding to a division portion of a sectional shape of the curved part, and a joining process in which two or more portions obtained by the bending process are joined together.
    2. (2) The curved-part forming method according to (1), wherein, prior to the bending process, a folding line is formed in the blank, or a cut is further formed in the blank.
    3. (3) The curved part manufactured using the curved-part forming method according to (1) or (2).
    4. (4) A curved-part manufacturing method for manufacturing a curved part using the curved-part forming method according to (1) or (2).
    [Advantageous Effects of Invention]
  • According to the present invention, since the material is bent and deformed almost without being variously deformed by drawing, stretch forming, and stretch flanging, it is possible to perform one-piece pressing forming of a single high-strength steel sheet into portions of the curved part. In addition, as a result of the shape of the curved part, which is a target to be formed, being reflected in the outline of the blank, it is possible to expect easy obtainment of parts having high strength and having a complex curved shape that could not be hitherto obtained, enlargement of space due to a reduction in the cross section of the parts, and a large reduction in weight because, for example, plate thickness is reduced and reinforcing parts are not used.
    • [Brief Description of Drawings]
    • [Fig. 1] Fig. 1 is a schematic view of an embodiment of the present invention.
    • [Fig. 2] Fig. 2 is a schematic view of an embodiment of the present invention (differing from the already mentioned embodiment).
    • [Fig. 3] Fig. 3 is a schematic view of an embodiment of the present invention (differing from the already mentioned embodiments).
    • [Fig. 4] Fig. 4 is a schematic view of an embodiment of the present invention (differing from the already mentioned embodiments).
    • [Fig. 5] Fig. 5 is a schematic view of an embodiment of the present invention (differing from the already mentioned embodiments).
    • [Fig. 6] Fig. 6 is a schematic view of an embodiment of the present invention (differing from the already mentioned embodiments).
    • [Fig. 7] Fig. 7 is a schematic view of an embodiment of the present invention (differing from the already mentioned embodiments).
    • [Fig. 8] Fig. 8 is a schematic view of an embodiment of the present invention (differing from the already mentioned embodiments).
    • [Fig. 9] Fig. 9 is a sectional view of various exemplary sectional shapes of curved parts.
    • [Fig. 10] Fig. 10 is a schematic view of examples of how folding lines are formed.
    • [Fig. 11] Fig. 11 is a schematic view of an exemplary curved part formed by conventional press forming.
    [Description of Embodiments]
  • Figs. 1 to 8 are schematic views of different embodiments of the present invention.
    Figs. 1 and 2 each show an exemplary case in which a curve of a curved part 30 in a longitudinal direction is along folding lines in only one of two opposite directions. Further, in Fig. 1, the sectional size is constant in the longitudinal direction of the part, and, in Fig. 2, the sectional size changes in the longitudinal direction of the part. Figs. 3 and 4 each show an exemplary case in which a curve of a curved part 30 in the longitudinal direction along folding lines changes from either one of two opposite directions to the other one of the two opposite directions. Further, in Fig. 3, the sectional size is constant in the longitudinal direction of the part, and, in Fig. 4, the sectional size changes in the longitudinal direction of the part. Figs. 5, 6, 7, and 8 each show an exemplary case in which a curve of a curved part 30 in the longitudinal direction is such that the curved part 30 is continuously curved in only one of two opposite directions (Figs. 7 and 8 each show an exemplary case in which the curved part has a warped sectional shape in the longitudinal direction). Further, in Fig. 5, the sectional size is constant in the longitudinal direction of the part, and, in Figs. 6, 7, and 8, the sectional size changes in the longitudinal direction of the part.
  • In these embodiments, two blanks 1 and 2 have the same planar shape, and the planar shape thereof has a side-bend outline corresponding to the curve of the curved part 30, which is a target to be formed, in the longitudinal direction of the curved part 30. It goes without saying that the blanks 1 and 2 may be previously provided with working holes or beads, etc. In a bending process, the blanks 1 and 2 are each bent into a sectional shape corresponding to a division portion of a sectional shape of the curved part 30, so that portions 10 and 20 constituting the curved part 30 are formed. Reference numerals 1F and 2F denote portions corresponding to flanges of the blanks 1 and 2, or denote the flanges of the portions 10 and 20. In Figs. 1 to 8, broken lines and dotted lines that are formed in regions of the shapes of the blanks 1 and 2 represent mountain folding and valley folding, respectively, and indicate places corresponding to bend portions (protrusion edges and recess edges) formed by bending in the bending process. In the bending process according to the present invention, using a die, the blanks are press bended so that forming portions of the blanks become bend portions that are in correspondence with target parts. By the press bending, forming materials primarily undergo deformation of bending forming, and are formed into target shapes.
  • Next, in a joining process, the portions 10 and 20 are joined together, to obtain the curved part 30. Joining methods may be any one of, for example, welding, caulking, riveting, and adhesion using an adhesive.
    Although the embodiments shown in Figs. 1 to 6 are those in which the blanks are formed into a part sectional shape shown in Fig. 9(a), the present invention is not limited thereto. It is obvious that the present invention is applicable to cases in which, for example, as shown in Fig. 9(b), the blanks are formed into a part sectional shape that is the reverse of that in Fig. 9(a) at the left and right sides; or, as shown in Fig. 9(c), the blanks are formed into a part sectional shape so that the flanges 2F of only the structural portion 20 are bent. The embodiments shown in Figs. 7 and 8 are those in which the blanks are formed into a part sectional shape shown in Fig. 9(d).
  • Although, the embodiments shown in Figs. 1 to 6 and Fig. 8 use two blanks having the same planar shape for one curved part, the present invention is not limited thereto. It is obvious that the present invention is applicable to a case in which three or more blanks are used for one curved part, with at least one of the blanks having a planar shape that differs from the planar shapes of the remaining blanks.
    Further, in the present invention, in order to increase position precision of the bend portions during the bending, it is desirable to previously provide folding lines in portions of the blanks where the mountain folding and the valley folding are performed. The present invention is not only limited to (continuously) forming the folding lines along an entire bending processing portion. The folding lines may be (intermittently) formed in only portions of the bending processing portion according to the circumstances. As a method of forming the folding lines, it is desirable to use, for example, coining. Another example thereof is a method of continuously transferring the unevenness of a roller surface to surfaces of the materials. Suitable forms of folding lines may be provided by forming V grooves, such as that shown in Fig. 10(d), in a linear form (10(a)), a broken-line form (10(b)), or a dotted-line form (10(c)), or in a combination of any of these forms. Here, it is desirable that the depth of the V grooves be less than or equal to 20% of the thickness of a metal plate (abbreviated as "plate thickness"). If the depth of the V grooves exceeds 20% of the plate thickness, the strength of the parts required for, for example, the frame of an automobile may be reduced, or cracks may be formed in the bend portions; and, in a high-strength metal material, it is not easy to form the grooves deeply, thereby causing serious production and cost problems.
  • The shape of the grooves is not limited to a V shape (the grooves are not limited to the V groove shown in Fig. 10(d)), so that the grooves may have various recessed shapes such as U shapes. When the curvature radius of the bend portions is large, a plurality of long and narrow grooves may be formed parallel to each other.
    When there are localized portions where wrinkles or cracks are very likely to be formed due to localized excessive stretching or compression during bending (for example, when there are a plurality of localized portions at portions of the blanks corresponding to the flanges that are likely to be subjected to excessive stretch flanging or shrink flanging), previously forming cuts in such localized portions makes it possible to more reliably prevent the formation of cracks and wrinkles, which is desirable.
    • [First Examples]
  • Blanks formed of thin steel sheets (material symbols A, B, and C) having plate thicknesses and tensile properties (yield strength YS, tensile strength TS, elongation El) shown in Table 1 were formed into curved parts by forming methods based on Table 2, and the shapes of the obtained curved parts were visually observed, to evaluate the forming methods. The results are as shown in Table 2. In conventional press forming according to a comparative example, wrinkles are formed in the wrinkle section and cracks are formed in the crack section shown in Fig. 11, whereas in the examples of the present invention, curved parts substantially having target shapes and without having cracks or wrinkles were obtained.
  • [Table 1]
    MATERIAL SYMBOL PLATE THICKNESS (mm) YS (MPa) TS (MPa) E1 (%)
    A 1.6 710 990 17
    B 1.6 810 1190 13
    C 1.6 1300 1500 9
  • [Table 2]
    No. MATERIAL SYMBOL FORMING METHOD RESULT OF FORMING REMARKS
    1 A CONVENTIONAL PRESS FORMING NO GOOD CRACKS/WRINKLES PRODUCED COMPARATIVE EXAMPLE
    2 A METHOD ILLUSTRATED IN FIG. 1 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    3 A METHOD ILLUSTRATED IN FIG. 4 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    4 A METHOD ILLUSTRATED IN FIG. 7 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    5 B CONVENTIONAL PRESS FORMING NO GOOD CRACKS/WRINKLES PRODUCED COMPARATIVE EXAMPLE
    6 B METHOD ILLUSTRATED IN FIG. 3 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    7 B METHOD ILLUSTRATED IN FIG. 6 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    8 B METHOD ILLUSTRATED IN FIG. 8 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    9 C CONVENTIONAL PRESS FORMING NO GOOD CRACKS/WRINKLES PRODUCED COMPARATIVE EXAMPLE
    10 C METHOD ILLUSTRATED IN FIG. 5 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    11 C METHOD ILLUSTRATED IN FIG. 2 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    12 C METHOD ILLUSTRATED IN FIG. 7 GOOD NO CRACKS/WRINKLES PRODUCED EXAMPLE OF PRESENT INVENTION
    • EXAMPLES 2
  • Folding lines provided by V grooves (whose depths are shown in Table 3) in a linear form, a broken-line form, or a dotted-line form, such as those shown in Fig. 10, were previously formed in blanks formed of thin steel sheets (material symbols A, B, and C) having plate thicknesses and tensile properties (yield strength YS, tensile strength TS, extension El) shown in Table 1. Then, the blanks were formed into curved parts using forming methods based on Table 3, and the shapes of the obtained curved parts were visually observed, to evaluate the forming methods. The results are as shown in Table 3. In the examples of the present invention, cracks or wrinkles were not produced, and curved parts whose shapes more closely matched the target shapes compared to the curved parts in the first examples of the present invention (that is, curved parts whose dimensional precisions were good) were obtained.
  • [Table 3]
    No. MATERIAL SYMBOL V GROOVE V GROOVE DEPTH (%) FORMING METHOD RESULT OF FORMING DIMENSIONAL PRECISION REMARKS
    1 A LINEAR FORM 7 METHOD ILLUSTRATED IN FIG. 1 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    2 A LINEAR FORM 6 METHOD ILLUSTRATED IN FIG. 2 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    3 A BROKEN-LINE FORM 12 METHOD ILLUSTRATED IN FIG. 3 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    4 A BROKEN- LINE FORM 19 METHOD ILLUSTRATED IN FIG. 4 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    5 A DOTTED- LINE FORM 10 METHOD ILLUSTRATED IN FIG. 5 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    6 A DOTTED- LINE FORM 16 METHOD ILLUSTRATED IN FIG. 6 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    7 A LINEAR FORM 12 METHOD ILLUSTRATED IN FIG. 7 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    8 A LINEAR FORM 5 METHOD ILLUSTRATED IN FIG. 8 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    9 B LINEAR FORM 10 METHOD ILLUSTRATED IN FIG. 5 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    10 B LINEAR FORM 8 METHOD ILLUSTRATED IN FIG. 6 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    11 B DOTTED- LINE FORM 4 METHOD ILLUSTRATED IN FIG. 1 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    12 B DOTTED-LINE FORM 15 METHOD ILLUSTRATED IN FIG. 2 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    13 B BROKEN- LINE FORM 6 METHOD ILLUSTRATED IN FIG. 3 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    14 B BROKEN-LINE FORM 13 METHOD ILLUSTRATED IN FIG. 4 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    15 B DOTTED- LINE FORM 16 METHOD ILLUSTRATED IN FIG. 7 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    16 B DOTTED-LINE FORM 6 METHOD ILLUSTRATED IN FIG. 8 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    17 C BROKEN- LINE FORM 8 METHOD ILLUSTRATED IN FIG. 3 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    18 C BROKEN- LINE FORM 12 METHOD ILLUSTRATED IN FIG. 4 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    19 C DOTTED-LINE FORM 4 METHOD ILLUSTRATED IN FIG. 5 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    20 C DOTTED- LINE FORM 9 METHOD ILLUSTRATED IN FIG. 6 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    21 C LINEAR FORM 3 METHOD ILLUSTRATED IN FIG. 1 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    22 C LINEAR FORM 5 METHOD ILLUSTRATED IN FIG. 2 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    23 C BROKEN- LINE FORM 5 METHOD ILLUSTRATED IN FIG. 7 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    24 C BROKEN- LINE FORM 10 METHOD ILLUSTRATED IN FIG. 8 GOOD NO CRACKS/WRINKLES PRODUCED GOOD EXAMPLE OF PRESENT INVENTION
    • Reference Signs List
    • 1, 2
    Blanks
    1F, 2F
    Flanges, Portions corresponding to flanges
    10, 20
    Portions constituting curved parts according to present invention
    30
    Curved part according to present invention (target to be formed)
    50
    Curved part formed by conventional press forming (50A and 50B denote portions constituting curved part 50)

Claims (3)

  1. A curved-part forming method for obtaining a curved part by performing forming on a blank formed of a single metal plate, the method comprising:
    a bending process in which the blank having a curved outline corresponding to a curve of the curved part in a longitudinal direction is bent into a sectional shape corresponding to a division portion of a sectional shape of the curved part; and
    a joining process in which two or more portions obtained by the bending process are joined together.
  2. The curved-part forming method according to Claim 1, wherein, prior to the bending process, a folding line is formed in the blank, or a cut is further formed in the blank.
  3. The curved part manufactured using the curved-part forming method according to either Claim 1 or Claim 2.
EP10820735.8A 2009-09-29 2010-09-28 Bent member and method for manufacturing same Active EP2484461B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009224515A JP5515566B2 (en) 2009-09-29 2009-09-29 Bent member forming method, bent member and bent member manufacturing method
PCT/JP2010/067312 WO2011040623A1 (en) 2009-09-29 2010-09-28 Bent member and method for manufacturing same

Publications (3)

Publication Number Publication Date
EP2484461A1 true EP2484461A1 (en) 2012-08-08
EP2484461A4 EP2484461A4 (en) 2015-06-03
EP2484461B1 EP2484461B1 (en) 2018-04-18

Family

ID=43826424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10820735.8A Active EP2484461B1 (en) 2009-09-29 2010-09-28 Bent member and method for manufacturing same

Country Status (7)

Country Link
US (1) US20120171506A1 (en)
EP (1) EP2484461B1 (en)
JP (1) JP5515566B2 (en)
KR (1) KR101443990B1 (en)
CN (1) CN102574192B (en)
CA (1) CA2772925C (en)
WO (1) WO2011040623A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017108526A1 (en) * 2015-12-22 2017-06-29 Thyssenkrupp Steel Europe Ag Semi-finished product for producing hollow profiled sections, hollow profiled sections made therefrom, and method for producing same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5888048B2 (en) * 2011-06-08 2016-03-16 Ｊｆｅスチール株式会社 Manufacturing method of metal parts with solid edges
JP5915930B2 (en) * 2011-07-06 2016-05-11 株式会社リコー Bending member, rail-shaped member, and image forming apparatus
EP2946845B1 (en) 2013-01-16 2017-06-28 Nippon Steel & Sumitomo Metal Corporation Press-forming method
US10665387B2 (en) * 2016-05-10 2020-05-26 GM Global Technology Operations LLC Method of fabrication of a curvilinear magnet
EP3379001B1 (en) * 2017-03-22 2020-01-08 Marte and Marte Limited Zweigniederlassung Österreich Arbitrarily curved support structure
US10428522B2 (en) * 2017-09-25 2019-10-01 Pravin Nanayakkara Construction metallic trapezoidal systems
JP2022042636A (en) * 2020-09-03 2022-03-15 プレス工業株式会社 Vehicle body frame member, and method of manufacturing vehicle body frame member

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1940305A (en) * 1930-11-22 1933-12-19 Chrysler Corp Method of making rear axle housings
US2508032A (en) * 1945-12-22 1950-05-16 Benjamin H Kennedy Structural metal member
AT271829B (en) * 1966-08-09 1969-06-10 Voest Ag Folded tube and method and device for the production of foldable tubes
US3881338A (en) * 1971-06-02 1975-05-06 Robertson Co H H Method of bending a metal sheet and a corner produced thereby
AU6392473A (en) * 1973-02-20 1975-06-26 Wellington R F Pipe offset
US4002000A (en) * 1975-06-30 1977-01-11 Palmer-Shile Company Beam construction and method of manufacture
US4041668A (en) * 1975-12-04 1977-08-16 Chicago Metallic Corporation Clip structure for a concealed grid structure of a suspended ceiling
US4841616A (en) * 1987-08-03 1989-06-27 The Charles Stark Draper Laboratory, Inc. Helically wound elbow conduit and method of fabricating same
US4796946A (en) * 1987-09-04 1989-01-10 Inland Steel Company Automotive vehicle door and bar reinforcement
JPH0536410A (en) * 1991-07-26 1993-02-12 Matsushita Electric Ind Co Ltd Manufacture of positive electrode active material for organic electrolyte battery
JPH06328988A (en) * 1993-03-23 1994-11-29 Toupure Kk Vehicle bumper beam
JP3194407B2 (en) * 1994-06-14 2001-07-30 ダイハツ工業株式会社 Pressing method and press mold device for sheet metal work
WO2001018341A2 (en) * 1999-09-10 2001-03-15 Amweld Building Products, Llc Door construction and method
SE516374C2 (en) * 2000-02-22 2002-01-08 Workpiece controlled shaping of metal, preferably in the form of plates or bands, comprises heating the workpiece across notches or zones to reduce locally the tensile strength
US6877349B2 (en) * 2000-08-17 2005-04-12 Industrial Origami, Llc Method for precision bending of sheet of materials, slit sheets fabrication process
US7263869B2 (en) * 2000-08-17 2007-09-04 Industrial Origami, Inc. Method for forming sheet material with bend controlling grooves defining a continuous web across a bend line
DE102006042856B3 (en) * 2006-09-13 2008-05-08 STRICKER IRD-Patent GbR (vertretungsberechtigter Gesellschafter Urban Stricker, 57271 Hilchenbach-Vormwald) Method and blank for producing a screw tube conveyor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011040623A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017108526A1 (en) * 2015-12-22 2017-06-29 Thyssenkrupp Steel Europe Ag Semi-finished product for producing hollow profiled sections, hollow profiled sections made therefrom, and method for producing same

Also Published As

Publication number Publication date
CN102574192A (en) 2012-07-11
CA2772925A1 (en) 2011-04-07
JP5515566B2 (en) 2014-06-11
JP2011073010A (en) 2011-04-14
CN102574192B (en) 2015-07-01
CA2772925C (en) 2015-02-03
KR20120055616A (en) 2012-05-31
EP2484461A4 (en) 2015-06-03
EP2484461B1 (en) 2018-04-18
KR101443990B1 (en) 2014-09-23
US20120171506A1 (en) 2012-07-05
WO2011040623A1 (en) 2011-04-07

Similar Documents

Publication Publication Date Title
EP2484461B1 (en) Bent member and method for manufacturing same
US10160031B2 (en) Method of forming a closed cross-sectional structure
EP2896467B1 (en) Method for producing curved article
KR101999459B1 (en) Blank, molded article, mold and method for producing blank
CN108778550B (en) Method for producing panel-shaped molded article
JP6128226B2 (en) PRESS-MOLDED PRODUCT, PRESS-MOLDED PRODUCTION METHOD, AND PRESS-MOLDED PRODUCTION DEVICE
US9630238B2 (en) Method and apparatus that forms a closed cross-sectional structure
JP5640346B2 (en) Manufacturing method of polygonal closed cross-section structural parts
KR101579028B1 (en) Method for manufacturing closed-structure part and apparatus for the same
JP6156608B1 (en) Manufacturing method of stretch flange molded parts
US10500625B2 (en) Method for manufacturing metal component with three-dimensional edge and die sets for manufacturing the same
EP3915694B1 (en) Press molding method and press machine
CN111093852B (en) Hot press molded article, method and apparatus for producing the same
EP3085468B1 (en) Press molding method
JP6319383B2 (en) Manufacturing method of stretch flange molded parts
JP5868568B2 (en) Bent member forming method and bent member manufacturing method
KR20210141652A (en) Press forming method
JP6319382B2 (en) Manufacturing method of stretch flange molded parts
WO2021241024A1 (en) Press-forming method
US12036596B2 (en) Press forming method
JP2016040052A (en) Method for forming bent member, and method for manufacturing bent member

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120427

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602010050070

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: B21D0051160000

Ipc: B21D0005010000

RA4 Supplementary search report drawn up and despatched (corrected)

Effective date: 20150504

RIC1 Information provided on ipc code assigned before grant

Ipc: B21D 47/01 20060101ALI20150427BHEP

Ipc: B21D 5/01 20060101AFI20150427BHEP

Ipc: E04C 3/07 20060101ALI20150427BHEP

17Q First examination report despatched

Effective date: 20161221

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20171206

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 989883

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180515

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602010050070

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180418

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180718

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180718

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180719

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 989883

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180820

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602010050070

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

26N No opposition filed

Effective date: 20190121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180930

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20100928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180418

Ref country code: MK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180818

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20220804

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230808

Year of fee payment: 14

Ref country code: DE

Payment date: 20230802

Year of fee payment: 14

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230928