EP1250199B1 - Procede et outil de deformation pour la fabrication de tubes cylindriques par formage par fluage - Google Patents

Procede et outil de deformation pour la fabrication de tubes cylindriques par formage par fluage Download PDF

Info

Publication number
EP1250199B1
EP1250199B1 EP01909499A EP01909499A EP1250199B1 EP 1250199 B1 EP1250199 B1 EP 1250199B1 EP 01909499 A EP01909499 A EP 01909499A EP 01909499 A EP01909499 A EP 01909499A EP 1250199 B1 EP1250199 B1 EP 1250199B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
blank
forming tool
drawing die
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
EP01909499A
Other languages
German (de)
English (en)
Other versions
EP1250199A1 (fr
Inventor
Günther FRIEDHELM
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.)
Schmittersysco GmbH
Original Assignee
Schmittersysco GmbH
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 Schmittersysco GmbH filed Critical Schmittersysco GmbH
Publication of EP1250199A1 publication Critical patent/EP1250199A1/fr
Application granted granted Critical
Publication of EP1250199B1 publication Critical patent/EP1250199B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • 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
    • B21C37/30—Finishing tubes, e.g. sizing, burnishing

Definitions

  • the invention relates to a method for the production of cylindrical tube under plastic Forming a hollow cylindrical blank by extrusion, the Cylinder tube is created.
  • the blank is made into a substantially cylindrical one Drawing die inserted up to a stop.
  • a drawing mandrel with a larger outer diameter than that Inner diameter of the blank moved through the cavity of the blank. This occurs due to the flow of blank material pressed by the mandrel Length increase of the tubular blank instead, and the wall of the blank is reduced in cross section.
  • the invention further relates to an implementation of the process suitable forming tool with the hollow cylindrical die for receiving the pipe blank and the mandrel, which is by means of a mandrel bar is insertable into the blank.
  • the mandrel is conical Outer wall section for realizing a drawing angle between the Provide the inner wall of the blank and the mandrel.
  • From DE-PS 466434 is a method for the precise internal drawing of hollow bodies known about the type mentioned.
  • An already preformed piece of pipe is inserted into a die for post-processing and over its upper, flipped edge between an upper part and a lower part of the die pinched and held.
  • a pull rod which is approximately conical or wedge-like protruding pull rings, is through the pipe section in the die pushed through, the material of the inner wall of the pipe piece so distributed that not only the desired exact clear diameter for the Pipe piece is reached, but also a concentricity of the interior and Outside diameter, so a compensation of different wall thicknesses.
  • the invention is based, with such an object Extrusion process a time-saving production of pipes with tight To allow tolerance dimensions and increased reliability.
  • the inner diameter of the Drawing die and the outer diameter of the blank can each be selected so that there is radial play between the drawing die and the blank, and when moving the mandrel, the wall of the blank in radial Direction is pressed against the drawing die, the blank (also) with its outer diameter is expanded.
  • the invention includes the procedural teaching that for The following process steps are carried out: First, a tube is inserted into an essentially cylindrical drawing die Tool housing up to a stop (on the start or bottom side) and with radial. Inserted play against the inner wall of the drawing die. Then a mandrel with a larger outer diameter than that Inner diameter of the tube blank from the opening side of the drawing die retracted into the tube. While driving the mandrel through whose outer diameter is the diameter of the tube both inside and widened outside in such a way that the blank material radially adjoins the Creates inner wall of the drawing die and the cross-sectional thickness of the Pipe blanks are reduced. This results in a blank length increase either counter to or in the direction of the mandrel feed direction, depending on whether forward or backward extrusion is effected.
  • the Process limits due to the flow limit of the blank on its face Edition or the stop determined.
  • the maximum allowable reduction in Cross-sectional area of the blank must be chosen so that it is Passing through the mandrel does not cause the material to flow on bottom stop or the front bearing surface comes, in particular when reverse extrusion is realized.
  • the advantage of a time-saving Cylinder tube production achieved in just one working stroke.
  • the method also gradually using of several mandrels with different outside diameters and to carry out appropriately adapted drawing dies. Because of the The process according to the invention is expedient for process limits mainly for the production of cylinder tubes of relatively short length. On Cutting to length - as in the case of pulling pipes discussed above - is not necessary so that the manufacturing time can be reduced. tries have shown that the cylinder tubes manufactured in this way have an envelope tolerance high quality - better than H9.
  • the Auswerforgan can advantageously at the same time axial support of the blank during extrusion and stripping use.
  • This additional, functional utilization of the ejection organ for Support in the bottom end area of the die results in backward extrusion and - associated with it - a corresponding one Increase in length.
  • the cross-sectional expansion on the Blank end are formed in the direction of movement in the drawing die seen lying behind. Then the cross-sectional expansion can be used as a holding element Use in the beginning or entrance area of the drawing die by the blank hung on the drawing die over the cross-sectional extension and is supported. In this configuration, the increase in length can be over Reach forward extrusion within the die.
  • the drawing die To make it easy to remove the tube from the Ensuring the drawing die is an inventive step expediently parallel to the movement stroke of the drawing mandrel or the mandrel rod movable ejector for the (completely formed) cylinder tube into the Forming tool integrated.
  • the ejector can be - just like others Components of the forming tool such. B. mandrel - conveniently by means of Drive the hydraulic cylinder linearly, thereby integrating into the Overall tool is well practicable.
  • the ejection organ in coordination with the respective position of the scraper at the entrance to the To control or operate the drawing die.
  • One is in particular Overall control so useful that only after pressing the Scraper the approach of the ejector to the (fully formed) Cylinder tube is done.
  • the tube blank is provided primarily to reverse extrusion enable.
  • the sling means are mounted such that they can move shortly before the drawing mandrel is completely passed through the blank Lifting equipment due to a knocking or other action of the drawing mandrel Have it pressed radially outwards. This will completely pass the Drawing mandrel allows, so that post-processing of the (Finished) cylinder tube is avoided. At the same time.
  • a taper has been particularly beneficial from the opening to the bottom side by an amount of 0.01 to 0.05 mm each 100 mm in length. This slight taper affects the Wall thickness, but the pulling process creates a parallelism or cylindricity the inner wall ensures that only the outer wall in 100th Area is conical. Due to the slightly conical design Drawing die flows the material in the forming process against the easier Pin direction in the optimal way in length. In other words, the one at the Cutting plane generated outer diameter constantly migrates to cutting planes larger die size, so that there is a slight loose.
  • the drawing die with a working or pressing length of 10 is advantageous designed up to 500 mm. With this length, the average diameter of the (slightly conical) drawing die in coordination with the outside diameter of the Drawing mandrel for forming pipes from 2 to 4 mm wall thickness as cheap Process parameters. Other process parameters can also be used Consideration of individual influencing factors or boundary conditions realized become.
  • the drawing angle is expediently formed on the order of 6 to 8 °, in order not only to effect the material flow on the inner wall of the blank, but also in the presence of radially displaceable outwards An optimal radial transverse force over this support bracket to be able to generate.
  • the supporting effect of the lifting gear must not be prevented if a flow of blank material in the front Area to be avoided. Has proven to be particularly cheap in practice Drawing angle of 7 ° proved.
  • Cylinder tube After passing the mandrel through the Blank or the cylinder tube is the rear end area on the Opening side of the drawing die by a subsequent expanding mandrel in the Diameter expanded.
  • the expanding mandrel is located axially spaced behind or after the mandrel that is at the end of the mandrel bar is attached.
  • a complementary shape is expedient in the interior the opening side of the drawing die, with which the expanding mandrel can interact.
  • the forming tool for cylinder tube production consists of a steel tool housing in which a substantially cylindrical Drawing die 1 is integrated. This takes a tubular blank 3 as workpiece to be formed. Before the forming process, the blank 3 in the cylindrical drawing die 1 inserted, the diameter or Blank diameter is selected so that between blank 3 and the inner wall the drawing die 1 remains a radial play RS.
  • the Blank 3 brought into contact with several bottom-side stop body 4. This are on the one hand between the drawing die 1 or an assigned drawing mandrel 6 and a bottom-side ejector 8 (see also FIG. 2).
  • the examples shown are four in one quadrant of the tool circumference placed stop body 4a to 4d provided. They are radial in recesses Slidable in the tool housing in the transverse direction and over (not Drawn) spring means in the radially inwardly extended basic position held.
  • the mandrel 6 is attached to the end of a mandrel rod 5. He is with a rotationally symmetrical, also towards the bottom ejector 8 tapered shape.
  • the conicity angle is the above-mentioned drawing angle ⁇ forms 7 ° with respect to the tool central axis 1a or the inner wall of the blank 3.
  • the mandrel rod 5 is linear to it Drive, for example, via hydraulic cylinders in an upper part of one not here fully illustrated press clamped.
  • the tool housing is open attached to a press table (not shown).
  • the mandrel 6 has a larger outer diameter than that Inner diameter of the blank 3 and is from the opening side of the Drawing die 2 inserted into blank 3.
  • the diameter of the Blank 3 expanded from the inside.
  • the blank wall is in reduced their cross-sectional thickness. Due to the mandrel 6 it happens radial application of material of the blank wall to the inner wall 2 the drawing die 1.
  • the above radial play is due to the pressing action of the mandrel overcome.
  • the scraper 7 can for example by means of several concentric to the central axis 1a of the tool Blocking body can be realized, the same to each other as the stop body 4a-4d are grouped according to FIG. 2.
  • the individual will be useful Blocking body of the scraper 7 by a linear drive based on Pressure media (not shown) shifted radially inwards for actuation, see above that the (finished) cylinder tube with its rear face to the Bumpers of the stripping element 7 can hit and get caught.
  • a respective bevel which is in relation to the bottom Ejector 8 is arranged so that the latter upon actuation by closing the bottom-set die opening hits the bevel 4f. there creates a radial force component, by means of which the or Stop body 4a-4d against spring pressure from their radially inner Starting position can be moved radially outwards.
  • the second embodiment differs from the first 1 and 2 by an expanding mandrel 9, which on the mandrel rod 5th is additionally arranged downstream of the mandrel 6 with an axial distance.
  • the axial Distance corresponds approximately to the length of the blank or (finished) cylinder tube 3.
  • the working stroke for the mandrel rod 5 is set so that the expanding mandrel 9 in the upper or first opening area of the drawing die 2 onto the blank 3 acts, the (rear) end of which is widened, but only after the Drawing process by means of the upstream drawing mandrel 6 is completed.
  • FIG. 4 differs from that of Figures 1-3 essentially in that lifting means in the bottom Opening area of the drawing die are not arranged or are not necessary. This is due to a modified design of the blank 3 on its bottom opening area of the drawing die 2 opposite end back. This is "sculpted" in cross-section, that is, with a cross-section Extension or protuberance 11 provided. Through this the face of the Blank 3 is displaced radially outward beforehand, so that the ejection element 8 additionally the function of a counter holder against the feed direction of the Drawing mandrel 6 can exercise during the flow process. The "tulip" or Putting out the tube is advisable before insertion into the drawing die 2 carried out. This has the advantage that additional components such as the abutment bodies mentioned above are no longer necessary.
  • the forming tool shown in Figure 5 is essentially the same according to Figure 4. However, within the scope of the invention Procedure from that according to Figures 1-4: According to Figure 5 is (compared to Figure 4) the protuberance 11 seen on the opposite, in the feed direction rear end of the blank 3 formed.
  • the protuberance 11, which is also in a previous manufacturing step outside the forming tool can be generated, is also used as a hanging device for receiving the axial Forming force used by the mandrel 6 during its Working strokes is generated.
  • the entrance edge the drawing die 2 comprises.
  • the Auswerforgan 8 no longer needs how according to Figure 4, as a counter-holder or support to ensure a backward extrusion to act but it will be solely for the actual Ejection function used.
  • the design of the forming tool according to FIG. 6 is also based on the use of a tube blank 3 with the protuberance 11 at the rear end "Hang up” in the opening or entrance area of the drawing die 2 for the purpose Absorption of the axial forces of the mandrel 6 turned off.
  • a retaining ring 12 is provided, which in the in Figure 6 shown position abuts the inner edge on the top of the drawing die 2 and is connected radially outside to a head plate 13.
  • the retaining ring 12 and Head plate 13 are rigidly connected to each other, and this composite is in Frame of the forming tool arranged stationary or fixed.
  • the drawing die 2 released and after be moved below, in the sense of being carried along by the mandrel 6 the drawing die 2 comprises on its outer jacket by a clamping ring 14 which with a guide piston 15 firmly connected on its upper or rear side is.
  • a pressure plate 16 rigidly attached, which has a radially inwardly projecting section has. With this, the pressure plate 16 lies on the end face of a pressure tappet 17, which performs the function of a pressure pad (see below).
  • the tube blank 3 is "sculpted" in an external work step means, for example, provided with the protuberance 11 by binding.
  • an external work step means for example, provided with the protuberance 11 by binding.
  • the press ram 19 drives the mandrel rod 5 and the mandrel 6 on End of the mandrel rod into the cavity of the blank 3. Because of its larger size The mandrel 6 widens the blank 3 from the inside, so that prevailing radial play RS between the outer wall of the Blank 3 and the inner wall of the drawing die 2 is eliminated.
  • the Wall thickness of the blank 3 is quenched as it were. This creates Axial forces are applied over the radially inwardly projecting section of the Pressure plate 16 taken up by the plunger 17.
  • the plunger 17 is for Responded to a preset pressure threshold and entered like Pressure cushion if this pressure threshold is exceeded.
  • By an in A signal generated by a controller is used in the further course of the working stroke finally causes the plunger 17 to completely retract. Because a counter support by the pressure ram 17 is progressing Working stroke no longer required.
  • the plunger pin 18 is directly on Press ram 19 attached and this is linear and axially parallel moved according to the working stroke.
  • the tappet pin 18 passes through the Head plate 13 and presses on the drawing die 2 to its linear Shift.
  • the guide piston 15 is firmly connected to it Clamping ring 14 and the pressure plate 16 also moved on the underside.
  • the clamping ring surrounds the mandrel rod 5 concentric and lies on the cross-sectional or conically expanded mandrel 6 in the axial direction.
  • the clamping ring has one on its outer jacket Taper 23 with which a counter-taper 24 on the inner surface of the Retaining rings 13 correspond complementarily. This will make an oblique Tool center axis 1a extending receiving ring gap for the protuberance 11 of the blank 3 formed.
  • the compression spring 22 winds around the mandrel rod 5 and is supported on the one hand against the underside of the press ram 19. At the opposite end, the spring 22 enters an end recess of the Clamping ring 21, whereby this is pressed axially parallel to the mandrel 6.
  • a radially directed is created Force component on the protuberance 11 of the blank 3, whereby this with a stronger clamping force is held. With increasing working stroke (see right Half of Figure 7) this clamping force is stronger because the press ram 19 Compression spring 22 compresses and thus increases the spring tension.
  • the clamping ring 21 is expediently designed to be, for example, 0.05 mm smaller than the mandrel 6, so that the clamping ring 21 by the compression spring 22 securely is pushed open.
  • the drawing die 2 is taken along by the tappet pin 18 As already described above, the holding force increases due to increased pressure of the spring 22 on the clamping ring 21st

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Extrusion Of Metal (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (25)

  1. Procédé de fabrication d'un tube cylindrique, avec déformation plastique d'une ébauche de tube cylindrique creuse (3), par fluage, en le tube cylindrique, selon lequel on introduit l'ébauche (3) jusqu'à une butée (4), dans une matrice de filage (1) sensiblement cylindrique, et on déplace ensuite dans la matrice de filage (2), à travers l'espace creux de l'ébauche (3), un mandrin de filage (6) ayant un diamètre extérieur plus grand que le diamètre intérieur de l'ébauche (3), de sorte qu'en raison du fluage du matériau de l'ébauche compressé par le mandrin de filage (6), un accroissement en longueur de l'ébauche (3) se produit et la paroi de l'ébauche (3) est réduite en section transversale, le diamètre intérieur de la matrice de filage (1) et le diamètre extérieur de l'ébauche (3) étant choisis chacun de façon telle qu'il en résulte un jeu radial (RS) entre la matrice de filage (1) et l'ébauche (3), et la paroi de l'ébauche (3) étant repoussée dans la direction radiale, contre la matrice de filage (1) lors du mouvement de passage du mandrin de filage (6), l'ébauche (3) subissant alors un élargissement de son diamètre extérieur,
       caractérisé en ce qu'à la fin de l'opération de déformation, le mandrin de filage (6) est déplacé en retour dans la direction opposée à celle du mouvement de passage, et le tube cylindrique entraíné sur le mandrin de filage (6), lors de son mouvement de retour, est dégagé du mandrin de filage (6).
  2. Procédé selon la revendication 1, caractérisé en ce que, pendant ou après le pressage au moyen du mandrin de filage (6), l'extrémité de l'ébauche (3) associée au mandrin de filage (6), en tant qu'entrée, est évasée à l'aide d'un second mandrin (9) supplémentaire.
  3. Procédé selon l'une des revendications précédentes, caractérisé par une répétition multiple de la suite d'étapes de procédé citée, avec des matrices de filage (1) et des mandrins de filage (6) chaque fois d'un diamètre plus grand.
  4. Procédé selon l'une des revendications précédentes, avec utilisation d'une ébauche (3) comportant un tronçon d'extrémité (11) préalablement évasé en section transversale, pour interagir avec ou respectivement être maintenu par la butée (4) ou un bord d'extrémité de la matrice de filage (2), l'ébauche (3) étant, au moyen du tronçon d'extrémité (11) évasé, accrochée à ou en appui contre la butée (4) ou ledit bord d'extrémité, caractérisé en ce que l'évasement en section transversale est engendré par la réalisation d'un collet, avant l'introduction dans la matrice de filage (2).
  5. Procédé selon la revendication 4, caractérisé en ce que le tronçon d'extrémité (11) évasé en section transversale est réalisé par formage préalable à l'extrémité de l'ébauche (3), qui se situe à l'arrière en se référant à la direction du mouvement de passage, et l'ébauche (3), grâce à cet évasement en section transversale (11), est maintenue, dans la zone de début, à savoir la zone d'entrée de la matrice de filage (1), à l'encontre de la direction du mouvement de passage, et en ce qu'au moyen du mandrin de filage (6) passant à travers, un fluage vers l'avant, pour le matériau de l'ébauche, est engendré.
  6. Procédé selon l'une des revendications 4 ou 5, caractérisé en ce qu'après l'extraction achevée du mandrin de filage (6), on supprime l'évasement (11) dans le tronçon d'extrémité.
  7. Outil de formage pour la mise en oeuvre du procédé de fabrication d'un tube cylindrique selon l'une des revendications précédentes, comprenant une matrice (1) sensiblement cylindrique creuse, destinée à recevoir une ébauche de tube (3), et un mandrin de filage (6) pouvant être introduit dans et extrait de cette ébauche au moyen d'une tige de mandrin (5) et présentant un tronçon de paroi extérieure conique pour l'établissement d'un angle de filage (α) entre la paroi intérieure de l'ébauche (3) et le mandrin de filage (6), caractérisé en ce que dans ou devant la zone d'entrée de la matrice de filage (1) est disposée un organe dévêtisseur (7) pour détacher le tube cylindrique, dont le formage est achevé, du mandrin de filage (6), lors de son mouvement d'extraction de la matrice de filage (1).
  8. Outil de formage selon la revendication 7, caractérisé en ce que l'organe dévêtisseur (7) est réalisé au moyen d'un ou de plusieurs corps de blocage (7a, 7b), qui, à partir d'une position initiale peuvent être déplacés radialement ou transversalement à la direction de déplacement du mandrin de filage (6), dans ou au-dessus de l'ouverture d'entrée de la matrice de filage (1), d'une distance telle qu'il soit possible de recouvrir alors une zone de bordure de l'ouverture d'entrée, qui est congruente avec l'épaisseur de paroi du tube cylindrique.
  9. Outil de formage selon la revendication 7 ou 8, caractérisé en ce que dans une zone de fond de la matrice de filage (1) est disposé un organe éjecteur (8) pour le tube cylindrique, qui peut être déplacé parallèlement à ou de manière correspondante à la course de déplacement du mandrin de filage (6) ou de la tige de mandrin, et l'organe éjecteur (8) peut être commandé de manière coordonnée avec ou en fonction de l'organe dévêtisseur (7) ou des corps de blocage (7a, 7b), de façon telle que son actionnement ne s'effectue qu'après l'actionnement de l'organe dévêtisseur (7).
  10. Outil de formage selon la revendication 9, caractérisé par un ou plusieurs corps de butée (4a-4d), qui s'engagent radialement ou transversalement à la direction de déplacement du mandrin de filage (6), au moins dans le bord de la zone de fond de la matrice de filage (1), en vue de supporter frontalement l'ébauche (3) à l'encontre d'une force axiale exercée par le mandrin de filage (6), pour produire un fluage vers l'arrière, du matériau de l'ébauche.
  11. Outil de formage selon la revendication 10, caractérisé en ce que le ou les corps de butée (4a-4d) sont disposés entre le mandrin de filage (6) et l'organe éjecteur (8), et sont montés de manière à pouvoir coulisser, à l'encontre d'une force de ressort, à partir de leur position de base extraite, sous l'effet du mandrin de filage (6) ou de l'organe éjecteur (8), transversalement à leurs directions de déplacement ou radialement vers l'extérieur.
  12. Outil de formage selon la revendication 10 ou 11, caractérisé en ce que le côté frontal radialement intérieur du ou des corps de butée (4a-4d) présente une inclinaison ou une conicité, qui est dirigée vers ou est associée à l'organe éjecteur (8).
  13. Outil de formage selon l'une des revendications 9 à 12, caractérisé en ce que l'espace creux de la matrice de filage (1) se rétrécit quant à son diamètre, de la zone de l'entrée ou de l'ouverture à la zone de fond voisine de l'organe éjecteur (8).
  14. Outil de formage selon la revendication 13, caractérisé par un rétrécissement conique, notamment de 0,01 à 0,05 mm par 100 mm d'unité de longueur.
  15. Outil de formage selon l'une des revendications 9 à 14, caractérisé par un angle de filage (α) de 6° à 8°, de préférence de 7°.
  16. Outil de formage selon l'une des revendications précédentes, caractérisé par un mandrin d'évasement (9) disposé axialement à la suite du mandrin de filage (6), sur la tige de mandrin (5), et dont la distance (10) au mandrin de filage (6) correspond, au moins environ, à la longueur de l'ébauche de tube (3) à usiner.
  17. Outil de formage selon l'une des revendications précédentes, caractérisé en ce que la longueur de la matrice de filage (2), utile pour l'usinage de l'ébauche (3), est de 10 mm à 500 mm.
  18. Outil de formage selon la revendication 9, caractérisé en ce que l'organe éjecteur (8) est configuré et disposé de façon telle, qu'il s'engage dans la matrice de filage (2) ou dans sa zone d'ouverture de fond pour le soutien, axial ou parallèle à l'axe, de l'ébauche (3) sur sa face frontale.
  19. Outil de formage selon l'une des revendications précédentes, caractérisé en ce que la matrice de filage (1) est guidée ou entraínée en va-et-vient, axialement ou parallèlement à l'axe, et est couplée ou synchronisée sur le plan de la technique d'entraínement, avec le mouvement axial ou la course de travail du mandrin de filage (6).
  20. Outil de formage selon la revendication 19, caractérisé en ce que le couplage et/ou la synchronisation est réalisé au moyen d'un poinçon d'entraínement ou poinçon de presse (19) entraíné axialement ou parallèlement à l'axe et auquel sont reliés en commun le mandrin de filage (6) par l'intermédiaire de la tige de mandrin (5), et la matrice de filage (1) par l'intermédiaire d'une ou de plusieurs broches de poinçon (18, 18a-18d) parallèles à l'axe.
  21. Outil de formage selon la revendication 19 ou 20 et l'une des revendications 7, 8, 9 ou 10, caractérisé par l'agencement d'un dispositif de retenue (12) voisin de la zone d'ouverture, côté entrée, de la matrice de filage (1), ce dispositif de retenue étant prévu en position fixe et de manière à être complémentaire à un tronçon d'extrémité de l'ébauche (3), dans l'optique d'une venue en prise avec celui-ci, par adhérence et/ou complémentarité de forme.
  22. Outil de formage selon la revendication 21, caractérisé en ce que le dispositif de retenue (12) est conçu sous la forme d'un anneau de retenue adjacent à un bord d'ouverture de la matrice de filage (1) et comportant une paroi périphérique intérieure (12a, 24) qui s'étend de manière inclinée par rapport à l'axe central (1a) de la matrice et de manière complémentaire à un évasement ou à une collerette (11), préformé, d'une extrémité arrière de l'ébauche.
  23. Outil de formage selon la revendication 21 ou 22, caractérisé en ce que la tige de mandrin (5) ou le mandrin de filage (6), qui y est fixé, sont entourés d'un anneau de serrage (21) qui est en regard du dispositif de retenue (12) ou, le cas échéant, de l'anneau de retenue, et forme alors, avec ce dernier, un interstice annulaire pour la réception et le maintien de l'ébauche (3) à son extrémité arrière.
  24. Outil de formage selon la revendication 23, caractérisé en ce que la paroi périphérique extérieure (23) de l'anneau de serrage (21) et la paroi périphérique intérieure (24) de l'anneau de retenue (12) sont placées parallèlement l'une à l'autre.
  25. Outil de formage selon la revendication 23 ou 24, caractérisé en ce que la tige de mandrin (5), à son extrémité éloignée du mandrin de filage (6), est reliée à un poinçon d'entraínement ou poinçon de presse (19) pouvant être entraíné axialement ou parallèlement à l'axe, et sur lequel un élément de ressort de compression (22) s'appuie avec une extrémité, tandis qu'avec son autre extrémité cet élément de ressort s'appuie sur une face frontale arrière de l'anneau de serrage (21), avec une précontrainte pouvant être réglée en fonction de la course de déplacement du poinçon d'entraínement ou de presse (19).
EP01909499A 2000-01-28 2001-01-19 Procede et outil de deformation pour la fabrication de tubes cylindriques par formage par fluage Expired - Lifetime EP1250199B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10004732 2000-01-28
DE10004732 2000-01-28
PCT/DE2001/000227 WO2001054839A1 (fr) 2000-01-28 2001-01-19 Procede et outil de deformation pour la fabrication de tubes cylindriques par formage par fluage

Publications (2)

Publication Number Publication Date
EP1250199A1 EP1250199A1 (fr) 2002-10-23
EP1250199B1 true EP1250199B1 (fr) 2003-07-23

Family

ID=7629699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909499A Expired - Lifetime EP1250199B1 (fr) 2000-01-28 2001-01-19 Procede et outil de deformation pour la fabrication de tubes cylindriques par formage par fluage

Country Status (5)

Country Link
EP (1) EP1250199B1 (fr)
AT (1) ATE245499T1 (fr)
AU (1) AU2001237229A1 (fr)
DE (2) DE50100414D1 (fr)
WO (1) WO2001054839A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019103926A1 (de) * 2019-02-15 2020-08-20 Walter Henrich GmbH Verfahren und Vorrichtung zum axialen Umformen eines Rohres
CN111069445B (zh) * 2019-11-27 2021-03-02 江阴和宏精工科技有限公司 一种铜管扩径拉拔的壁厚控制方法
CN117732900B (zh) * 2024-01-02 2024-07-02 浙江三基钢管有限公司 一种冷拔设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE466434C (de) * 1928-10-16 Siegener Eisenbahnbedarf Akt G Verfahren zum genauen Innenziehen von Hohlkoerpern
GB922266A (en) * 1962-01-08 1963-03-27 Joseph Wilson Yowell Improvements in or relating to the production of tubes
FR1528079A (fr) * 1967-04-28 1968-06-07 Nippon Denso Co Procédé pour le finissage des carcasses de moteurs électriques
DE2401345A1 (de) * 1974-01-09 1975-07-10 Mannesmann Roehren Werke Ag Zieh-streckverfahren zur herstellung langer rohre und vorrichtung zur durchfuehrung des verfahrens

Also Published As

Publication number Publication date
DE50100414D1 (de) 2003-08-28
ATE245499T1 (de) 2003-08-15
DE10190194D2 (de) 2003-02-20
AU2001237229A1 (en) 2001-08-07
WO2001054839A1 (fr) 2001-08-02
EP1250199A1 (fr) 2002-10-23

Similar Documents

Publication Publication Date Title
DE2409668C2 (de) Verfahren und Vorrichtung zum Verdichten eines Metallpulverpresslings aus Hauptkörper und Nabenteil
EP1346160B1 (fr) Elément tourillon présentant une partie tige et une tête sphérique, composant d'assemblage et procédé de fabrication d'un tel élément tourillon
DE2325837B2 (de) Vorrichtung zum Herstellen von Innenverzahnungen durch Kaltpressen
DE2310983A1 (de) Verfahren zum gesenkschmieden von einteiligen profilrollen
DE2027692B2 (de) Quertransport-Warmgesenkschmiedepresse
EP0111687B1 (fr) Méthode de fabrication d'une bague de segments de commutateur
DE3004024C2 (de) Werkzeug zum Herstellen eines Gelenkkörpers
DE925566C (de) Kaltschlag-Kopfstauchpresse mit Werkzeugeinrichtung zum Herstellen eines glatten oder fassonierten Sacklochs in Bolzen-oder Schraubenkoepfen
EP1250199B1 (fr) Procede et outil de deformation pour la fabrication de tubes cylindriques par formage par fluage
EP2030701A1 (fr) Outil et procédé destinés à la fabrication d'un élément creux
DE4032424C2 (de) Verfahren und Vorrichtung zur Herstellung von gefalzten Rohren
DE3744046C2 (de) Verfahren und Vorrichtung zum Aushalsen von dünnwandigen Blechrohren
DE10151756C1 (de) Vorrichtung zum Herstellen eines Tampons
DE1299855B (de) Ziehverfahren fuer plattenartige Rohlinge aus einem druckplastifizierbaren Feststoff
DE10064376A1 (de) Rohr-Umformverfahren und -Umformvorrichtung zum Wandaufdicken
DE69322945T2 (de) Verfahren und Vorrichtung zum Fixieren eines mit zumindest einer zylindrischen Bohrung versehenen metallischen Stückes um ein metallisches Rohr
DE3024744A1 (de) Verfahren zum herstellen von felgen sowie drueckmaschine bzw. werkzeug fuer eine drueckmaschine, insbesondere zur durchfuehrung des verfahrens
DE19943805B4 (de) Verfahren zum Entformen eines Stempels aus einem hohlen Gegenstand und Werkzeug zum Bearbeiten von Rillen an der Innenmantelfläche eines solchen hohlen Gegenstands
DE910644C (de) Verfahren und Vorrichtung zum Herstellen einseitig geschlossener Hohlkoerper, Rohre u. dgl.
EP0615794B1 (fr) Procédé pour fabriquer une chambre de mandrin pour le filage en cascade de tubes et dispositif pour sa mise en oeuvre
DE1961892B2 (de) Hydraulische Tiefziehpresse
WO2010000233A1 (fr) Procédé de production de matériau tubulaire
DE3023388A1 (de) Indirekt-metallstrangpresse und arbeitsverfahren zum entfernen von eingefrorenen bloecken aus einer solchen presse
DE811109C (de) Verfahren und Vorrichtung zur Herstellung von nahtlosen Hohlkoerpern, insbesondere von Rohren auf Stossbaenken
DE10349699A1 (de) Verfahren und Vorrichtung zum Innenhochdruckumformen eines umfänglich geschlossenen Hohlprofils

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: 20020710

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

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

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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20030723

Ref country code: FR

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: 20030723

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: 20030723

Ref country code: GB

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: 20030723

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: 20030723

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: 20030723

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: 20030723

Ref country code: IE

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: 20030723

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50100414

Country of ref document: DE

Date of ref document: 20030828

Kind code of ref document: P

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

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: 20031023

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: 20031023

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: 20031023

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

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: 20031103

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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: 20031223

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20030723

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: 20040119

Ref country code: AT

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

Effective date: 20040119

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20030723

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 NON-PAYMENT OF DUE FEES

Effective date: 20040131

Ref country code: BE

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

Effective date: 20040131

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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

26N No opposition filed

Effective date: 20040426

BERE Be: lapsed

Owner name: *SCHMITTERSYSCO G.M.B.H.

Effective date: 20040131

EN Fr: translation not filed
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: 20050131

Ref country code: CH

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

Effective date: 20050131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Payment date: 20170327

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50100414

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20180801