EP1447152B1 - Werkzeug zum spitzbogenförmig Formen, zum Fliessdrehen oder zum Fliessstanzen von metallischen Werkstücken mit kreisförmigem oder eiförmigem Querschnitt - Google Patents

Werkzeug zum spitzbogenförmig Formen, zum Fliessdrehen oder zum Fliessstanzen von metallischen Werkstücken mit kreisförmigem oder eiförmigem Querschnitt Download PDF

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Publication number
EP1447152B1
EP1447152B1 EP04300069A EP04300069A EP1447152B1 EP 1447152 B1 EP1447152 B1 EP 1447152B1 EP 04300069 A EP04300069 A EP 04300069A EP 04300069 A EP04300069 A EP 04300069A EP 1447152 B1 EP1447152 B1 EP 1447152B1
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EP
European Patent Office
Prior art keywords
tool
protrusions
ogive
grooves
tool according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04300069A
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English (en)
French (fr)
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EP1447152A1 (de
Inventor
Gilbert Salvador
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.)
Inter Meca (societe A Responsabilite Limitee)
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Inter Meca (societe A Responsabilite Limitee)
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Publication of EP1447152A1 publication Critical patent/EP1447152A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/063—Friction heat forging
    • B21J5/066—Flow drilling
    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/298—Forming collars by flow-drilling
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B21D41/045—Closing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • B21K21/14—Shaping end portions of hollow articles closed or substantially-closed ends, e.g. cartridge bottoms

Definitions

  • the present invention relates to a tool according to the preamble of claim 1.
  • the document EP-A-0769337 presents a method for closing the end of a steel tube, the principle of which is to apply a radial force on the outer surface of the tube, close to the end to be closed, then to move the application area of the force, continuously both circumferentially and radially with respect to said tube, so as to progressively deform inwardly of the side wall thereof until its end is completely closed.
  • the document US 2408596 is relative to another device for closing the end of a tube.
  • This device combines the axial rotation of the tube and the heating thereof with the movement in a circular arc, in a movement back and forth, a roller-like tool rolling on the end of said tube.
  • EP-A-0695593 also describes a device for closing by spinning an open end of a tube.
  • the tube is engaged in a bore and comes into contact successively, according to its depression, pairs of conical rollers of different angles, more and more open with the axis of said tube according to their position in the longitudinal direction.
  • the rotation of the tube and the axial thrust exerted on it, can gradually close the end of the tube.
  • the document EP-A-0916428 relates to a method and an apparatus for spinning cylindrical casings for muffler or catalytic converter of a motor vehicle.
  • the ceramic tool although more resistant to wear and allowing higher speeds of rotation compared to a tool, even carbide, requires the use of heating means to bring the metal temperature sufficient for its plastic deformation and avoid internal tensions.
  • the present invention is therefore able to overcome these various disadvantages, thanks to a tool and a device implementing this tool to perform the forming of metal parts, quickly and economically, without requiring recourse to conventional heating means.
  • the present invention relates to a ceramic tool according to claim 1, for the ogivage, spinning, or fluo-drilling, having, on the surface, a succession of reliefs forming, as the case, projections and / or grooves, to produce, when subjected to rotation, a hammering effect so as to obtain an increase in the temperature of said piece to be exchanged, fluotourner, or fluopercer.
  • the invention also relates to a device for the ogivage, spinning, or flow of metal parts of round and / or ovoid, of the type comprising at least one such tool (1) ceramic applied to said piece to ogiver, fluotourner , or fluopercer and able to be driven in a translational movement and / or rotation while said metal part is driven in a rotational movement about its main axis.
  • the present device is characterized, moreover, in that said ceramic tool is defined by a drilling drum comprising on the surface reliefs formed by a regular alternation of successively increasing and then decreasing thickness protrusions.
  • the reliefs are formed by a regular alternation of projections having a first thickness and on either side of which are provided projections having a second thickness, less than said first thickness, and delimiting two by two each time a groove.
  • said device may also be characterized in that said tool is defined by a concave matrix, whose inner wall of substantially ogival shape has, on the surface, an alternation of grooves and recesses arranged radially around of said wall.
  • the present device is characterized in that the width of said grooves and said projections narrows from the base to the top of the ceramic tool.
  • the present device is further characterized in that said ceramic tool is made in one piece.
  • said tool is made from a plurality of assembled elements.
  • the present invention also relates to the application of a device as previously described for the design of elements used in the composition of motor vehicle exhaust lines.
  • the present invention relates to a device for ogiver, fluotourner and / or fluopercer particular metal parts, such as steel tubes, for example to manufacture elements used in the composition of a motor vehicle engine.
  • Such a device comprises, in a conventional manner, a ceramic tool 1 capable of being set in rotational and / or translational movement, where appropriate with respect to itself and / or with respect to said tube against which it is applied.
  • the tool 1 can have a large number of shapes, in particular cylindrical or spherical, adapted according to the work to be done. Thus, it can take the form of a drill, a matrix or a pebble.
  • said tool 1 has the particularity of having, on the surface, reliefs forming a succession of projections 10, 11 and / or grooves 12 whose presence makes it possible to induce spontaneously and quite completely surprisingly, a very rapid rise in temperature at the part to be formed.
  • this rise in temperature results from a hammering effect, following the contact and the relative rotational movement between said part and said tool 1.
  • This rotation can be printed, for example, by means of a control machine classic digital working at speeds between 10000 and 15000 rev / min.
  • This characteristic thus makes it possible not only to avoid the aforementioned disadvantage of scale formation, but also to simplify the device used to carry out said flow-forming, said ogivage or said flow-through.
  • Such characteristics also make it possible to take real advantage of the inherent properties of the ceramic constituting such a tool 1, and to avoid the phenomena of metal tearing observed with tools made of other materials.
  • the various projections 10, 11 or grooves 12 defining the reliefs on the surface of the tool 1 will have a thickness, if necessary, a depth of the order of 0.2 to 0.5 mm.
  • protrusions 10, 11 or grooves 12 may also be made on the entire surface of the tool 1.
  • a first embodiment of tool 1, shown in FIG. figure 1 more particularly relates to the field of fluo-piercing.
  • the present device is further characterized in that said ceramic tool is defined by a flow-forming forest comprising on the surface reliefs formed by an alternation.
  • the tool 1 is defined by a forest 2 comprising on the surface formed reliefs, as visible in FIG. figure 2 by a regular alternation of projections 10, 11 of successively increasing and decreasing thicknesses.
  • it is three protrusions 10 having a first thickness and framed projections 11 (two in the illustrated embodiment), having a second thickness, less than the first.
  • These projections 11, of smaller thickness between two projections 10, delimit, each time in pairs, a groove 12.
  • the grooves 12 and the projections 10, 11 defining the relief at the surface of the drill bit 2 preferably have a narrowing width from the base 21, 31 to the top 22, 32 of the ceramic tool 1.
  • Such a tool 1 makes it possible to produce on very thin tubes fluopercé holes in which one can proceed to tapping, directly, without any other contribution of material or welding.
  • fluopercé holes in which one can proceed to tapping, directly, without any other contribution of material or welding.
  • tearing material in the form of burrs, likely to off.
  • the tool 1 is designed in the form of a concave matrix 3 defining a kind of case inside which the workpiece is able to be introduced.
  • Said matrix comprises an internal wall 30 of substantially ogival shape which has, on the surface, an alternation of projections 10 and grooves 12 arranged radially around said wall 30, and whose width narrows from the base 31 to the apex 32 and which, as previously described, make it possible to very quickly reach the creep temperature, through simple high-speed friction, of the tool 1 on said part.
  • the tool 1 is more in the form of a disk which, on its active face 33, has grooves 12 and / or radial projections 10, this active face 33 being flat or concave as visible in FIG. figure 5 .
  • the embodiment corresponding to the figure 7 differs from that of Figures 5 and 6 in that the substantially disk-shaped debossing tool 1 has a planar active face 33 having projections in a peripheral zone 35, and / or grooves 12, while in a central zone 36 it is devoid of roughness.
  • peripheral zone 35 it is possible to obtain the desired temperature increase in the initial phase of ogivage, knowing that once the ideal temperature is reached and the partially closed tube intervenes the central zone 36 smooth for perfect its closure.
  • the asperities in said peripheral zone 35 is in the form of radial projections 10, in the form of notches of pyramidal section decreasing from the periphery to the center of the tool.
  • the ogivage of the part is achieved quickly, without adding material or additional welding, avoiding any deposition of calamine, and without premature deterioration of the tool 1.
  • the present invention therefore brings about a clear progress in the technical field considered.
  • the tool 1 can, if necessary, be designed in one piece, which gives it an exceptional strength, able to withstand particularly severe constraints.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)
  • ing And Chemical Polishing (AREA)
  • Ceramic Products (AREA)

Claims (13)

  1. Werkzeug zum spitzbogenförmig Formen, zum Fließdrehen oder zum Fließstanzen von metallischen Werkstücken mit kreisförmigem oder eiförmigem Querschnitt, umfassend an der Oberfläche eine Folge von je nach dem Fall Vorsprünge (10, 11) und/oder Nuten (12) bildenden Erhöhungen, um, wenn es in Drehung gesetzt ist, einen Hammereffekt zu bewirken, so dass eine Temperatursteigung des besagten spitzbogenförmig zu formenden, zu fließdrehenden oder zu fließstanzenden Werkstück erhalten wird, dadurch gekennzeichnet, dass es aus Keramik hergestellt ist.
  2. Werkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die besagten Nuten (12) und die besagten Vorsprünge (10, 11), welche die Folge von Erhöhungen an der Oberfläche des besagten Werkzeuges (1) aus Keramik bilden, je nach dem Fall eine Tiefe oder eine Dicke zwischen 0,2 mm und 0,5 mm aufweisen.
  3. Werkzeug nach irgendeinem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das besagte Werkzeug (1) aus Keramik aus einem Bohrer zum Fließbohren (2) besteht, der an der Oberfläche Erhöhungen umfasst, die aus einer regelmäßigen Abwechslung von Vorsprüngen (10, 11) mit aufeinanderfolgend zunehmenden, anschließend abnehmenden Dicken bestehen.
  4. Werkzeug nach Anspruch 3, dadurch gekennzeichnet, dass die besagten Erhöhungen aus einer regelmäßigen Abwechslung von Vorsprüngen (10) mit einer ersten Dicke bestehen, an denen beidseitig Vorsprünge (11) mit einer zweiten Dicke, die kleiner als die erste Dicke ist, vorgesehen sind, die jeweils paarweise eine Nut (12) bilden.
  5. Werkzeug nach irgendeinem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das besagte Werkzeug (1) aus einer konkaven Stanze (3) besteht, deren Innenwand (30) einer im wesentlichen spitzbogenförmigen Gestalt an der Oberfläche eine Abwechslung von radial um die besagte Wand (30) angeordneten Rillen (10) und Nuten (12) aufweist.
  6. Werkzeug nach irgendeinem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass die Breite der besagten Nuten (30) und der besagten Vorsprünge (10, 11) von der Basis (21, 31) bis zur Spitze (22, 32) des Werkzeuges (1) aus Keramik abnimmt.
  7. Werkzeug nach irgendeinem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das besagte Werkzeug (1) zum spitzbogenförmig Formen eines Werkstückes (34) als eine Scheibe ausgestaltet ist, die eine flache oder konkave aktive Fläche (33) aufweist.
  8. Werkzeug nach Anspruch 7, dadurch gekennzeichnet, dass sich die Nuten (12) und/oder die Vorsprünge (10) radial im Bereich der aktiven Fläche (33) des Werkzeuges (1) erstrecken.
  9. Werkzeug nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die Vorsprünge (10) und/oder Nuten (12) im Bereich einer Umkreiszone (35) der aktiven Fläche (33) des Werkzeuges (1) vorgesehen sind.
  10. Werkzeug nach irgendeinem der vorgehenden Ansprüche, dadurch gekennzeichnet, dass das besagte Werkzeug (1) aus Keramik einteilig hergestellt ist.
  11. Werkzeug nach irgendeinem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das besagte Werkzeug (1) aus einer Mehrheit von zusammengefügten Elementen besteht.
  12. Vorrichtung zum spitzbogenförmig Formen, zum Fließdrehen oder zum Fließstanzen von metallischen Werkstücken mit kreisförmigem oder eiförmigem Querschnitt, der Art umfassend wenigstens ein Werkzeug (1) nach irgendeinem der vorgehenden Ansprüche, das gegen das besagte spitzbogenförmig zu formende, zu fließdrehende oder zu fließstanzende Werkstück anliegend und geeignet ist, um einer Translations- und/oder Drehbewegung ausgesetzt zu werden, während das besagte metallische Werkstück einer Drehbewegung um seine Hauptachse ausgesetzt ist.
  13. Anwendung einer Vorrichtung nach Anspruch 12 zum Erzeugen von Elementen, die für die Zusammensetzung von Auspufflinien von Kraftfahrzeugen dienen.
EP04300069A 2003-02-07 2004-02-09 Werkzeug zum spitzbogenförmig Formen, zum Fliessdrehen oder zum Fliessstanzen von metallischen Werkstücken mit kreisförmigem oder eiförmigem Querschnitt Expired - Lifetime EP1447152B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0301452 2003-02-07
FR0301452A FR2850889B1 (fr) 2003-02-07 2003-02-07 Dispositif utilise pour l'ogivage, le fluotournage, ou le fluopercage de pieces metalliques de section ronde et/ou ovoide

Publications (2)

Publication Number Publication Date
EP1447152A1 EP1447152A1 (de) 2004-08-18
EP1447152B1 true EP1447152B1 (de) 2011-06-22

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EP04300069A Expired - Lifetime EP1447152B1 (de) 2003-02-07 2004-02-09 Werkzeug zum spitzbogenförmig Formen, zum Fliessdrehen oder zum Fliessstanzen von metallischen Werkstücken mit kreisförmigem oder eiförmigem Querschnitt

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EP (1) EP1447152B1 (de)
AT (1) ATE513634T1 (de)
FR (1) FR2850889B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2941638A1 (fr) * 2009-02-04 2010-08-06 Inter Meca Procede de generation d'un bourrelet dans une piece a paroi mince.
CN106334722B (zh) * 2016-08-31 2018-04-06 广州沃福模具有限公司 一种生产套管的冷冲压方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR761102A (fr) * 1933-02-27 1934-03-12 R A M S Metal Works Ltd Perfectionnements à la fabrication des bacs métalliques cylindriques, spécialement des bacs en zinc pour cellules de batteries électriques sèches
CH586078A5 (de) * 1974-05-10 1977-03-31 Geffen Tech Handels En Adviesb
NL160499B (nl) * 1974-11-28 1979-06-15 Geffen Tech Adviesbureau Bv Doorn voor het maken van een door een kraag omgeven gat in een metalen plaat of wand van een metalen buis.
US4132097A (en) * 1977-11-03 1979-01-02 Tridan Tool & Machine, Inc. Method for forming collared holes
GB2069386B (en) * 1980-02-18 1983-08-10 British Steel Corp Rotary piercing tools
GB2091610B (en) * 1981-01-21 1984-06-27 Hiby Friedrich Karl Flow drilling tools
NL8100304A (nl) * 1981-01-22 1982-08-16 Flowdrill Bv Vloeiboor voor het maken van gaten in plaatmateriaal.
US4428214A (en) * 1982-02-08 1984-01-31 Deere & Company Flow drilling process and tool therefor
US4454741A (en) * 1982-02-19 1984-06-19 Flowdrill B.V. Flow drill for the provision of holes in sheet material

Also Published As

Publication number Publication date
FR2850889B1 (fr) 2006-03-24
ATE513634T1 (de) 2011-07-15
FR2850889A1 (fr) 2004-08-13
EP1447152A1 (de) 2004-08-18

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