EP1712307B1 - Méthode d'obtention d'une pièce en tôle comprenant au moins un bord au moins partiellement roulé et pièce obtenue suivant cette méthode. - Google Patents

Méthode d'obtention d'une pièce en tôle comprenant au moins un bord au moins partiellement roulé et pièce obtenue suivant cette méthode. Download PDF

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Publication number
EP1712307B1
EP1712307B1 EP06007257A EP06007257A EP1712307B1 EP 1712307 B1 EP1712307 B1 EP 1712307B1 EP 06007257 A EP06007257 A EP 06007257A EP 06007257 A EP06007257 A EP 06007257A EP 1712307 B1 EP1712307 B1 EP 1712307B1
Authority
EP
European Patent Office
Prior art keywords
edge
workpiece
rolled
material projection
curvature
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.)
Not-in-force
Application number
EP06007257A
Other languages
German (de)
English (en)
Other versions
EP1712307A3 (fr
EP1712307A2 (fr
Inventor
Werner König
Hansjörg Schneider
Uwe Panther
Volker Bienmüller
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.)
Progress Werk Oberkirch AG
Original Assignee
Progress Werk Oberkirch AG
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 Progress Werk Oberkirch AG filed Critical Progress Werk Oberkirch AG
Publication of EP1712307A2 publication Critical patent/EP1712307A2/fr
Publication of EP1712307A3 publication Critical patent/EP1712307A3/fr
Application granted granted Critical
Publication of EP1712307B1 publication Critical patent/EP1712307B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/12—Edge-curling

Definitions

  • the invention relates to a method according to the preamble of claim 1 for producing a workpiece in the form of a sheet having at least one at least partially rolled edge, wherein the at least one edge to be rolled has a curvature in at least one section, with the steps of providing the workpiece and at least partially rolling the at least one edge of the workpiece.
  • the invention further relates to a workpiece in the form of a sheet according to the preamble of claim 7 with at least one at least partially rolled edge, wherein the at least one rolled edge has a curvature in at least one section.
  • a method and a workpiece of the type mentioned is, for example GB-A-403 594 well known.
  • the workpiece For rolling an edge of the workpiece in the form of a sheet, the workpiece is placed in a special rolling tool, which has a tool upper part and a lower tool part.
  • the upper tool part and the lower tool part are movable relative to one another.
  • a part-circular in cross-section trough is present, in which the workpiece is pressed with the edge to be rolled forward by the relative movement between the lower part of the tool and the upper part of the tool.
  • the edge As the edge pushes into the part-circular trough, the edge curls along the inner wall of the part-circular trough.
  • Rolling of the edge may, for example, be done only partially, for example over a roll angle of 90 ° to 180 °, or over 180 °, until a roll angle of nearly 360 °, i. a complete curl of the edge is achieved.
  • the technical problem underlying the present invention is another which arises when the edge to be rolled, i. before its rolling, has a curvature or bend.
  • the invention is therefore based on the object to improve a method of the type mentioned in that when rolling the edge of the workpiece, the risk that a kink in the rolled edge is formed, avoided or at least reduced.
  • the invention is further based on the object of specifying a workpiece produced in this way.
  • this object is achieved with respect to the method mentioned above with a method according to the features of claim 1, wherein the workpiece in the at least one portion having the curvature, with at least one in the longitudinal direction of the edge over a portion of at least one to be rolled An edge extending material extension is provided so that the edge to be rolled protrudes in the region of the material extension over the edge adjacent to the material extension transverse to the longitudinal direction of the edge, and that the edge including that of the material extension is then rolled.
  • the object with respect to the aforementioned workpiece is achieved with a workpiece according to the features of patent claim 7, wherein the workpiece has at least one material extension extending in the longitudinal direction of the edge over a partial region of the edge in the at least one section which has the curvature, such that the rolled edge in the region of the material extension projects transversely to the longitudinal direction of the edge over the edge adjoining the material extension, and that the edge including that of the material extension is rolled.
  • the workpiece in the region of curvature of the edge has additional material in the form of the aforementioned material extension, which in the rolling process together with the remaining edge is rolled up with.
  • the extent to which the material extension protrudes beyond the edge adjacent to the material extension transversely to the longitudinal direction of the edge is expediently chosen so that the material extension does not or does not substantially reduce the roll angle to be achieved. This is not a problem if a roll angle of about 180 ° is selected, ie the edge to be rolled is rolled about 180 °, as in this case for the material extension still sufficient space within the rolled edge is available.
  • the inventively provided material extension preferably extends in the longitudinal direction of the edge to be rolled over a portion of the edge to be rolled, which corresponds approximately to the length of the portion of the edge in which the curvature is present.
  • the at least one material extension extends beyond the smallest radius of the curvature.
  • the edge to be rolled has a curvature whose radius of curvature is not constant over the curvature, but rather changes. This may for example be the case when the workpiece has a straight portion and a curved portion, wherein the curved portion merges into the straight portion. From the transition of the straight section into the curved section, the radius of curvature initially decreases continuously until a region of the smallest radius of curvature is reached.
  • the at least one material extension is preferably arranged in the region of the smallest radius of curvature and preferably extends over the smallest radius of the curvature.
  • the edge of the at least one material extension passes smoothly over into the edge adjoining the material extension.
  • This measure has the advantage that in the transition region from the edge of the material extension into the material extension adjacent edge or edge notch effects or cracking when rolling the edge can be avoided.
  • edge of the at least one material extension transitions obliquely straight or in a convex or concave line into the edge adjoining the material extension.
  • the aforementioned embodiments represent advantageous examples of a smooth transition of the edge of the material extension into the edge adjoining the material extension.
  • the material extension is formed integrally with the remaining material of the workpiece.
  • This measure has the advantage that the production cost of the workpiece compared to the conventional method, in which no material extension, as described above, is provided is not increased because in a one-piece design of the material extension this already in the prefabrication of the workpiece to be rolled with can be taken into account, ie does not have to be added as an additional component to the workpiece.
  • An inventively produced according to one or more of the aforementioned embodiments workpiece in the form of a sheet having at least one at least partially rolled edge has the advantage that it is kink-free in the region of curvature or in the region of the curvatures of the edge or a possible kink less pronounced is than with the conventionally produced workpieces.
  • Fig. 1 a method for producing a workpiece in the form of a sheet with an at least partially rolled edge according to the prior art described.
  • Fig. 1a is provided with a general reference numeral 100 provided workpiece, which is provided in the form of a sheet 102.
  • the sheet 102 has an edge 104 which is to be rolled.
  • Rollers is a forming operation in the context of non-cutting production, in which a sheet metal edge is generally bent so that the bent edge seen in cross section occupies a substantially part-circular shape.
  • the shape of the bent edge does not have to have a circular shape, but may also have a different shape in cross section.
  • the workpiece 102 according to Fig. 1a has a portion 106 in which the workpiece 102 and in particular the edge 104 has a curvature.
  • the sheet 102 is placed in a rolling tool 108 having a tool top 110 and a tool base 112.
  • the tool upper part 110 can be moved toward the tool lower part 112 in accordance with an arrow 114.
  • the tool upper part 110 is stationary, and the tool lower part 112 is movable against the direction of the arrow 114 toward the tool upper part 110.
  • the edge 104 In the tool top 110 there is a semicircular trough or cavity 116 which serves to roll the edge 104.
  • the edge 104 to be rolled contrary to the illustration in FIG Fig. 1b ) slightly tilted before rolling.
  • the sheet 102 is firmly clamped.
  • Fig. 1c) and 1d shows a second stage of the rolling process.
  • the edge 104 has now been rolled by pressing the sheet 102 with the edge 104 to be rolled into the tool upper part 110 in front by approximately 90 °.
  • Fig. 1c shows the sheet 102 in side view in this intermediate stage of the rolling process.
  • Fig. 1e) and 1f ) now show the third stage of the rolling process, in which the edge 104 has been rolled by about 180 °.
  • Fig. 1e is shown that, as the edge 104 continues to roll, starting from Fig. 1c ) too Fig. 1e ) in the portion 106 in which the sheet 102 has the curvature, an undesirable kink 116 has formed, which reduces the usefulness of the workpiece 102 for its further processing or its subsequent use or even completely eliminated.
  • it is not guaranteed to roll a curved edge of a workpiece kink-free.
  • Fig. 2a shows a workpiece 10 in the form of a sheet 12 having an edge 14 which is to be at least partially rolled.
  • the shape of the workpiece 12 corresponds to the shape of the workpiece 102 in FIG Fig. 1a ), and this has a corresponding section 16, in which the workpiece 12, but in particular the edge 14 has a curvature.
  • the sheet 12 is now provided so that in the section 16 having the curvature there is a material extension 17 which extends in the longitudinal direction of the edge 14 (x-direction) over a portion of the edge 14 to be rolled.
  • the edge 14a protrudes beyond the edge 14b or 14c adjoining the material extension 17 transversely to the longitudinal direction of the edge 14, ie in the ⁇ direction.
  • the material extension 17 extends over a point 19 of the smallest radius of the Curvature of the portion 16 on both sides of the point 19 away.
  • the edge 14a of the material extension 17 merges smoothly into the edge 14b or 14c adjoining the material extension 17, specifically in the embodiment shown with a respective oblique straight line 21 or 23.
  • a straight transition between the edge 14a and the edge 14c or 14b instead of a straight transition between the edge 14a and the edge 14c or 14b, however, a curved, for example convexly curved or concavely curved transition can be selected.
  • the material extension 17 is in particular integrally formed with the remaining material of the workpiece 10 and the sheet 12.
  • the workpiece 10 is preferably punched together with the material extension 17 previously in a punching operation from a flat product, wherein the punching tool (not shown) correspondingly has a shape that is cut out during punching of the material extension 17 together with the remaining part of the sheet 12 from the flat product ,
  • Fig. 2b shows accordingly Fig. 1b ) a rolling tool 18, with a tool upper part 20 and a tool lower part 22, wherein the tool upper part 20 according to an arrow 24 on the lower tool part 22 toward movable or the lower tool part 22 against the arrow 24 to the tool Upper part 20 is moved towards.
  • the sheet 12 is clamped.
  • a trough 26 is formed, which is the trough 116 of the tool upper part 110 in Fig. 1 equivalent.
  • both the trough 116 and the trough 26 in the longitudinal direction of the edge 104 and the Edge 14 or perpendicular to the plane in Fig. 1b ) and Fig. 2b ) corresponds to the curve or line curve of the edge 104 or the edge 14.
  • a curvature can be present not only in one plane but also in two or three planes.
  • the workpiece 10, which has been manufactured in this way with a rolled edge may in particular be a backrest part of a motor vehicle seat, which has a curvature, such as in Fig. 2 shown, has.
  • a workpiece 10 suitable for further use and processing or processing is obtained for such a backrest part, which is difficult or impossible to produce with the conventional method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Metal Rolling (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (11)

  1. Procédé de réalisation d'une pièce (10) en forme de tôle (12) avec au moins un bord (14) au moins partiellement roulé, ledit au moins un bord (14) à rouler comportant une courbure dans au moins un tronçon (16), ledit procédé comportant les étapes : mise à disposition de la pièce (10) et roulage au moins en partie dudit au moins un bord (14) de la pièce (10), caractérisé en ce que la pièce (10) dans ledit au moins un tronçon (16), qui comporte la courbure, est mise à disposition avec au moins une saillie de matière (17), s'étendant dans la direction longitudinale du bord (14) sur une zone partielle dudit au moins un bord (14) à rouler, de telle sorte que, dans la zone de la saillie de matière (17), ledit bord (14) à rouler s'avance transversalement à la direction longitudinale du bord (14) au-delà du bord (14b, 14c) adjacent à la saillie de matière (17), et en ce que le bord (14), y compris celui de la saillie de matière (17), est ensuite roulé.
  2. Procédé selon la revendication 1, caractérisé en ce que ladite au moins une saillie de matière (17) s'étend au-delà du plus petit rayon de la courbure.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le bord (14a) de ladite au moins une saillie de matière (17) se prolonge en douceur dans le bord (14b, 14c) adjacent à la saillie de matière (17).
  4. Procédé selon la revendication 3, caractérisé en ce que le bord (14a) de ladite au moins une saillie de matière (17) se prolonge en oblique, en ligne droite ou selon une ligne convexe ou concave dans le bord (14b, 14c) adjacent à la saillie de matière (17).
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la saillie de matière (17) est réalisée d'un seul tenant avec le reste de matière de la pièce (10).
  6. Procédé selon la revendication 5, caractérisé en ce que la pièce (10) est mise à disposition conjointement avec la saillie de matière (17) sous la forme d'une seule pièce de découpe.
  7. Pièce en forme de tôle (12), comportant au moins un bord (14) au moins partiellement roulé, ledit au moins un bord (14) roulé comportant une courbure dans au moins un tronçon (16), caractérisée en ce que la pièce (10) dans ledit au moins un tronçon (16), qui possède la courbure, comporte au moins une saillie de matière (17), s'étendant dans la direction longitudinale du bord (14) sur une zone partielle du bord (14), de telle sorte que, dans la zone de la saillie de matière (17), ledit bord (14) roulé s'avance transversalement à la direction longitudinale du bord (14) au-delà du bord (14b, 14c) adjacent à la saillie de matière (17), et en ce que le bord (14), y compris celui de la saillie de matière (17), est roulé.
  8. Pièce selon la revendication 7, caractérisée en ce que ladite au moins une saillie de matière (17) s'étend au-delà du plus petit rayon de la courbure.
  9. Pièce selon la revendication 7 ou 8, caractérisée en ce que le bord (14a) de ladite au moins une saillie de matière (17) se prolonge en douceur dans le bord (14b, 14c) adjacent à la saillie de matière (17).
  10. Pièce selon la revendication 9, caractérisée en ce que le bord (14a) de ladite au moins une saillie de matière (17) se prolonge en oblique, en ligne droite ou selon une ligne convexe ou concave dans le bord (14b, 14c) adjacent à la saillie de matière (17).
  11. Pièce selon l'une quelconque des revendications 7 à 10, caractérisée en ce que la saillie de matière (17) est réalisée d'un seul tenant avec le reste de matière de la pièce (10).
EP06007257A 2005-04-13 2006-04-06 Méthode d'obtention d'une pièce en tôle comprenant au moins un bord au moins partiellement roulé et pièce obtenue suivant cette méthode. Not-in-force EP1712307B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005018284A DE102005018284A1 (de) 2005-04-13 2005-04-13 Verfahren zum Herstellen eines Werkstückes in Form eines Bleches mit zumindest einer zumindest teilweise gerollten Kante, sowie derartig hergestelltes Werkstück

Publications (3)

Publication Number Publication Date
EP1712307A2 EP1712307A2 (fr) 2006-10-18
EP1712307A3 EP1712307A3 (fr) 2006-12-13
EP1712307B1 true EP1712307B1 (fr) 2009-09-30

Family

ID=36579146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06007257A Not-in-force EP1712307B1 (fr) 2005-04-13 2006-04-06 Méthode d'obtention d'une pièce en tôle comprenant au moins un bord au moins partiellement roulé et pièce obtenue suivant cette méthode.

Country Status (4)

Country Link
US (1) US7395687B2 (fr)
EP (1) EP1712307B1 (fr)
AT (1) ATE444128T1 (fr)
DE (2) DE102005018284A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015005074B4 (de) 2015-04-20 2018-02-08 Aweba Werkzeugbau Gmbh Aue Außenkantenbördel und Bördelverfahren an planflächigen oder formbehafteten Blechteilen
DE102015005075B4 (de) 2015-04-20 2016-12-15 Aweba Werkzeugbau Gmbh Aue Verfahren und Werkzeug für die Außenkanten-Bördelung planflächiger oder formbehafteter Blechteile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1555895A (en) * 1924-11-03 1925-10-06 American Nat Company Method of bending sheet-metal blanks having alpha rolled edge
GB403594A (en) * 1932-07-29 1933-12-28 Walter Skelton Hudson Improvements in or relating to the rims of metal plate walling such as that of wagonbodies, tanks and the like
US2275220A (en) * 1933-02-20 1942-03-03 Crown Cork & Seal Co Method of and apparatus for making closure caps
US2394019A (en) * 1941-12-10 1946-02-05 American Can Co Method of forming lever open containers
US3350751A (en) * 1964-11-23 1967-11-07 Gen Electric Erectile member
JPS5850130A (ja) * 1981-09-22 1983-03-24 Toyota Motor Corp 縁曲端部成形方法及び縁曲端部成形装置

Also Published As

Publication number Publication date
EP1712307A3 (fr) 2006-12-13
ATE444128T1 (de) 2009-10-15
US7395687B2 (en) 2008-07-08
EP1712307A2 (fr) 2006-10-18
US20060230808A1 (en) 2006-10-19
DE102005018284A1 (de) 2006-10-19
DE502006004955D1 (de) 2009-11-12

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