EP1294501B1 - Procede et dispositif pour la production de raccords tubulaires a la presse en acier, notamment en acier special - Google Patents

Procede et dispositif pour la production de raccords tubulaires a la presse en acier, notamment en acier special Download PDF

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Publication number
EP1294501B1
EP1294501B1 EP01933971A EP01933971A EP1294501B1 EP 1294501 B1 EP1294501 B1 EP 1294501B1 EP 01933971 A EP01933971 A EP 01933971A EP 01933971 A EP01933971 A EP 01933971A EP 1294501 B1 EP1294501 B1 EP 1294501B1
Authority
EP
European Patent Office
Prior art keywords
pipe end
tool
pipe
expanding mandrel
blank
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
EP01933971A
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German (de)
English (en)
Other versions
EP1294501A1 (fr
Inventor
Walter Bauer
Jürgen NÄGELER
Walter Viegener
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.)
Witzig and Frank GmbH
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Witzig and Frank GmbH
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Filing date
Publication date
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Publication of EP1294501A1 publication Critical patent/EP1294501A1/fr
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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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • 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
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling

Definitions

  • connection technology pressfittings came into use, the connection to Pipe ends together and for the production of pipe branches serve.
  • Press fittings are used for production pushed the pipe connection to the respective pipe ends, one in an annular bead of the press fitting held O-ring establishes a fluid-tight connection.
  • the pressfitting will then work on one accordingly provided pressing area radially inward plastically deformed, whereby it mechanically secured to the pipe end becomes.
  • the compounds thus obtained are reliable producible and long-term stable.
  • Copper pipes use copper press fittings.
  • the production is concerned with EP 0649689 B1.
  • to Production of these copper press fittings serve longitudinal or transversely divided matrices into which a correspondingly preformed Blank with flared pipe end is insert.
  • the female mold has an annular groove in its inner shape, which form the outer shape of a press fitting to be formed Ringsicke sets.
  • To form this annular bead serves a compression device with a mandrel, the Support in the open tube end of the lying in the die Blanks is introduced.
  • This process is specially for the production of Copper press fittings designed and suitable. It requires a blank, the outer dimensions of the recording room the die is adjusted so that he is fed up the die rests. The blank must therefore before the Upsetting to form the annular bead first the corresponding Coarse form. For this he has to be at his end be widened. This step is before perform. After inserting the pre-expanded blank he is cut to size in the matrix. In the mold is then calibrated on the pre-expanded and calibrated to length (cut to length) blank an upsetting and rolling step performed to produce the desired ring thickness. It will get copper pressfittings, which are against the Pipe mouth recessed annular bead have.
  • a Pressing the press fitting is with appropriate Pressing tools or pressing tongs possible at the same time the existing on both sides of the O-ring parts of the Capture fittings, thereby also when using copper as a fitting material a very good mechanical connection between the pipe end and the press fitting is obtained.
  • the tools for pressing the press fittings are specifically designed for the special shape of the pressfittings. When using otherwise shaped press fittings the installer concerned needs new tools purchase.
  • Stainless steel pressfittings for stainless steel pipe installation are usually constructed in such a way that immediately at its free end an O-ring seat is formed.
  • a typical representative of such press fittings is the EP 0361630 B1.
  • This press fitting has a Connection portion, the inner diameter of the Outer diameter of a pipe to be connected expanded is.
  • At the end of the press fitting is the wall of the same initially bent radially outward and then under Forming an annular bead crimped inwards.
  • Pressfittings can not handle the same tools be pressed, as they are already for copper press fittings in use, one on each side of the O-ring Pressing area exhibit.
  • press fittings require machines and methods that press fittings in very large Quantities are reliable to produce. To be reliable To achieve pipe connections, the press fittings be manufactured with low tolerances. This must be be possible as low as possible production costs. Corresponding intended to manufacture the machine or device the press fittings are simple and robust yet reliable pressfittings in the desired Quality can produce.
  • DE-A-2110758 discloses a method of preparation a coupling sleeve of a single copper pipe section.
  • the copper pipe section in a the Tube section outside comprehensive die inserted and by means of a step mandrel widened by this means a hydraulic drive in the copper pipe section is introduced.
  • the step mandrel points to his from the penetrating section at the far end of an inclined Ring shoulder on, towards the end of the expansion process with the end face of the copper pipe section comes into contact.
  • the annular shoulder is conical.
  • the opposite lying surface of the die comprising the pipe section is mirror-inverted conical.
  • the conical Sections of the expansion punch and die take one outward arching section of the copper tube on.
  • the cut to length Pipe sections expanded and with an annular Beading provided, which serves as an O-ring seat.
  • the expansion and the beading i.e., the formation of the bead
  • the pressfitting neither to transported by another tool, still being worked on, e.g. recalibrated or cut to length.
  • the sequence of steps is therefore cut to length, expansion, Corrugations.
  • the diameter of the pipe end the blank preferably by more than a double wall thickness widened.
  • This creates the possibility of emanating from the tube material of the Type has been cut to length in the later installation to connect with the press fittings.
  • the press fitting is therefore not a particularly pipe material required, which in turn lowers costs and simplifies the production.
  • the widening of the pipe ends also has the effect of being produced on the Pressfitting is formed a spigot that the axial insertion depth of the pipe to be connected limited. This creates defined conditions, so that the produced Crimp the required axial tensile strength receives.
  • a Mandrel for expanding the tube end of the blank in the same pushed axially under pressure.
  • Process step that coincides with the expansion step may overlap, i.
  • the pipe end is with a compressive axial force acted upon, for example by a provided on the mandrel Ring shoulder or a separate pressure sleeve.
  • the material bulges the wall of the Pipe end despite radially inward-pointing bias by the axial compression force in a ring area after outside in a provided in the form of annular groove, wherein
  • the stainless steel material in the circumferential direction even further stretches as already done in the widening step.
  • the method is suitable for the pressfittings starting from a welded pipe material.
  • Weld may have a surface finish be present for the tight fit of an o-ring not suitable. This may be the case in particular be when the pipe material has been welded from the outside is.
  • a post-processing in particular the weld, he follows. This can, for example, in a rolling process done by from the inside, in particular the weld area, is rolled several times. As a rolling process can be carried out, for example, a so-called rolling, in which one carried by a finger and rotatably mounted Roll introduced into the pipe end and on an orbital track rolled along in the formed bead.
  • the roller is pressed radially outward.
  • the weld area is smoothed here.
  • the ring groove can be ground. It can it may be sufficient, just the weld area to grind. While the rolling the preference has to close pores and craters by squeezing them be, can be in the grinding process especially short clock cycles and particularly good bead geometries receive.
  • the press fittings to be produced can be one, two, have three or more pipe ends - depending on the application.
  • the simplest application is a straight pipe connector with two pipe ends. End caps only show a pipe end.
  • Branch pieces can be three or more Have pipe ends, wherein the blanks of such branches thus prepared in a preparatory step be that appropriate straight pipe ends in the desired number are available. Should bow fittings are produced, a cut piece of pipe in a corresponding shape first bent, after which then performed the method steps discussed above become.
  • the device suitable for producing the press fittings has a combined expansion and compression station on, to the at least one multi-part tool, an expansion mandrel and a compression member belong.
  • the Expansion mandrel and the compression element can in one Part combined or formed separately. Both elements, the expansion mandrel and the compression element, arrive at the same tool (shape) used simultaneously or successively.
  • the combined Expansion and compression station is thus a single Processing station, in which both the expansion as also the beading without intermediate step is performed.
  • the upsetting and beading in just one processing station enables a particularly cost-effective yet precise Manufacture of press fittings, i. the production the pressfittings mass-produced in a quality that a reliable production of long-term tight press connections allowed.
  • the tool can be parallel to the longitudinal direction of the Pipe end or be divided across this.
  • the parallel Division becomes the tool (the form) by two Form halves formed, the dividing line substantially at a height with the center line of the blank lies.
  • the formed in the mold halves annular groove for Determining the outer shape of the trainee bead is in both mold halves present and in their axial extent unchangeable.
  • the transverse division allows the half of the form creating a dividing line centered to the annular groove, leaving the annular groove in its axial extension is changeable.
  • the mandrel and the upsetting element unite by an annular shoulder on the expanding mandrel is trained.
  • the upsetting element and the expanding mandrel always in sync with each other, giving a high process reliability and a simple tool results.
  • the compression element can be a separate driven, slidably mounted on the mandrel pressure sleeve being on the pipe end and this one upsets after the pipe end is fully expanded has been.
  • the pressure sleeve eg. remotely controlled or force-controlled to optimum To achieve production results.
  • This is preferably done by Path control of the pressure element achieved.
  • the Aufweitdorn for example, with the interposition of a relative hard spring connected to its drive device be so that he bouncy against the annular shoulder between the first section and the second section of the tool starts.
  • the device can additionally with a roller burnishing station be provided. This can be done in a separate processing station be arranged when a very fast Working cycle is desired. However, it is preferred the burnishing station also in the expansion and compression station to integrate.
  • a roller burnishing station is provided to the rolling station.
  • the rolling station belongs one rotatably mounted on a finger roller and a drive device, with the finger in the widened and sucked tube end retracted and moved there in a circle until the formed bead, especially in the Area of a possibly existing weld seam of the pipe wall has the desired shape.
  • the rolling station can also be provided a grinding device.
  • the method and the device can be Press fittings made of stainless steel, which is a widened Pipe end and in this an annular bead for receiving having an O-ring as a sealing element.
  • the peculiarity this stainless steel press fitting is that on both sides of the O-ring, i. the ring bead, tubular pinch areas of the same diameter and approximately the same axial length are present as Can serve pinch area.
  • This is the stainless steel pressfitting on both sides of the O-ring with one to be connected Pressed pipe end. This not only increases actually the mounting safety and the strength of the Connection, but also acceptance in the market and allowed in addition, the use of squeezing tools, as used to date for copper pressfittings have found.
  • FIG. 1 shows a device 1 for the production illustrated by pressfittings, as for example.
  • a straighter Press fitting 2 of Figure 10 can be seen.
  • the Device 1 according to Figure 1 is used to produce arcuate Press fittings, including pre-bent, cut to length and tubular blanks 3 with constant Inner and outer diameter is assumed.
  • the device 1 has a held on a base 4 and divisible mold or die 5, which has a receiving space 6 with a first section 7 and a second Section 8 encloses.
  • the first section 7 of Receiving space 6 has an inner diameter, which with the outer diameter of the blank 3 matches.
  • Of the second section 8 serves to receive a pipe end 9 of the blank 3, which is the later crushing area of the trainee Press fittings will form.
  • the inner diameter the substantially cylindrical second portion 8 of the receiving space 7 is larger than the outer diameter of the non-deformed pipe end 9.
  • the inner diameter of the second section 8 is about the double wall thickness of the pipe end 9 greater than that Outer diameter of the undeformed pipe end 9.
  • a conical annular shoulder 11 is provided in the transition between the two sections 7, 8 of the interior 6 .
  • annular groove 14 is formed in the tool 5, the outer contour of a press fitting on the second trainees annular bead 15 determines.
  • the annular groove 14 forms a closed ring consistent, approximately semicircular, Section.
  • the illustrated in Figure 1 tool 5 is parallel divided to a longitudinal direction 16 of the receiving space 6.
  • the longitudinal direction 16 agrees with the two axial directions the open tube ends of the blank 3 match.
  • To the tool 5 includes a widening mandrel 18, a Upset element 19 and a drive device 21 for this.
  • the expansion mandrel 18, the compression element 19, the Drive device 21 and the tool 5 form a combines expansion and compression station 22 of the device 1.
  • the Aufweitdorn 18 is rigid and, if necessary, in one piece connected to the compression member 19, which in the embodiment the device 1 of Figure 1 by a Cylinder body is formed, which with a step or annular shoulder 25 in the cylindrical expansion mandrel 18 passes.
  • the cylinder body has a Outer diameter, which is the inner diameter of the widened Pipe end 9 exceeds.
  • the Outer diameter of the cylinder body lower than that Inner diameter of the second portion 8 of the interior 6, so that from the expansion mandrel 18 and the cylinder body formed thorn or body in the second section 8 of the receiving space 6 of the tool 5 retract can.
  • this combined Expansion and compression mandrel serves the drive device 21, in the present embodiment by a hydraulic drive is formed. Belongs to this a piston 26 in a cylinder chamber 27 a working space 28a and another working space 28b divides.
  • the piston 26 is, for example.
  • Not further illustrated fluid channels are the optional loading of the working spaces 28a, 28b with pressurized hydraulic fluid. This allows the Piston rod 29 targeted in both axial directions respectively in the direction of arrows 31, 32 are moved.
  • the device 1 described so far works like follows:
  • the expansion spike 18 sets with his chamfer 23 at the preferably deburred and, if necessary, with a small Inside andiliafase provided end face of the pipe end 9 on. Due to the continued axial movement of the expansion mandrel 18 penetrates this under expansion of the pipe end 9 in this one, without this much together. Due to the now occurring strain of the wall the pipe end 9 in the circumferential direction can have a certain Shortening of the pipe end 9 occur. The widened pipe end 9 is under tension on the lateral surface of the expansion mandrel 18 at. This slides ever further into the Interior of the pipe end inside and expands ever longer Sections of the pipe end. Even before the bevel 23 the Ring shoulder 11 reaches, sets the compression member 19, i.e.
  • the length of the hub can be through appropriate design the drive device 21 are dimensioned, for example. by the piston stroke is limited accordingly.
  • the Go through the working stroke i. the pipe end 9 expanded and compressed, as illustrated in Figure 2, the Working space 28b relieved of pressure and the working space 28a pressurized so that the piston 26 and with it the Compression member 19 and the expansion mandrel 18 in the direction of the arrow 32 extend from the tool 5 and the manufactured Release pressfitting.
  • This one can now off
  • the mold 5 are removed by these open and a new blank 3 is inserted, after which the above explained Repeated working cycle.
  • Pressfittings is thus only a single piston stroke of the piston 26 required. The production is effective and precise.
  • the carrier is moved, that the roller 36 to move into the interior of the pipe end 9 and then moving in the radial direction so that the roller 36 in the formed annular bead 15 a Circulating movement.
  • the rolling process becomes 2 up to 4 seconds at a speed of more than 5,000 RPM performed. This results in more than 10,000 Circulations that provide sufficient smoothing of the ring bead their inside, especially in the area of a possible Weld effect.
  • a driven grinding wheel are provided the entire annular bead 15 or only the area of Welded over.
  • FIG. 1 A modified embodiment of the device 1 is illustrated in FIG. As far as the device 1 coincides with the device 1 of Figure 1, is recourse to the same reference numerals and to the referenced above.
  • the device 1 according to FIG. 4 has a drive device 21 with separate drives 21a, 21b for the Expansion mandrel 18 and the upsetting element 19 on.
  • the expansion spike 18 is at its far from the chamfer 23 Side provided with a blind bore 40, one of which Compression spring 41 is added. This is based on the Bottom of the blind bore 40 from.
  • In the blind hole 40 dives a piston rod 42 of a hydraulic piston 43. This is disposed in a hydraulic cylinder 44 and divides there two workrooms 45a, 45b from. By targeted admission the working spaces 45a, 45b with pressure can the Expansion mandrel 18 in both directions 31, 32 moves become.
  • the stroke of the piston 43 is so great that start the expansion mandrel 18 against the annular shoulder 11 can. This serves as a stroke limiter for the piston 18th
  • the spring 41 is so hard that it retracts when retracting Expansion mandrel 8 in the pipe end 9 is not or not essential is compressed. This causes a precise Shape of the diameter transition of the blank 3 from expanded pipe connection region 9 to the unexpanded Area.
  • the device 1 is insensitive against positioning tolerances between the Tool 5 and the drive device 21.
  • FIG. 4 Another feature of the illustrated in Figure 4 Embodiment of the device 1 is located in the Compression element 19.
  • This is designed as a sleeve, the slidably mounted on the expansion mandrel 18.
  • the Sleeve is provided with its own drive device 21a, to a piston 46 mounted in a cylinder 47 heard.
  • This divides two working spaces 48a, 48b, selectively and selectively pressurized with hydraulic fluid can be.
  • Both drive devices 21a, 21b are independently controllable, whereby the expansion and compression of the pipe end. 9 can be optimized.
  • this embodiment has their meaning when on a machine frequently the tools 5 are to switch to different To produce press fittings.
  • FIG. 5 shows the state of the device 1 after the end of the compression step.
  • the expansion mandrel 18 has the pipe wall firmly against the inner shoulder eleventh pressed.
  • the pipe end 9 is fully expanded and the sleeve is so far immersed in the tool 5 and has the pipe end 9 compressed so far that the Pipe wall, the annular groove 14 just fills and thus the desired bead 15 is formed.
  • FIG. 6 shows a further embodiment of the device 1 illustrates. As far as conformity with above embodiments, is based on the same reference numerals to the above Description referenced.
  • the tool 5 of the device 1 is not only two parts, but three parts. In addition to his Division parallel to the longitudinal central axis 16 is in a plane shared, which lies in the annular groove 14.
  • a tool part 5a is present before, during or be applied to the rest of the tool 5 after upsetting can.
  • For centering serves a corresponding cylindrical Seat 50.
  • the tool part 5a by means of a corresponding positioning device in Direction of the arrow 31 to the tool 5 moves.
  • the Positioning device also carries the drive device 21 for actuating the expansion mandrel 18 and of the compression element 19. Are both processing steps, i.e.
  • the widening and upsetting has done the Device 1 the illustrated in Figure 7 state. It is now the piston 26 by pressurizing the Working chamber 28 a withdrawn from the pipe end 9. After that the tool part 5a is moved away from the tool 5 and Although in the direction of arrow 32. This will be the pipe end 9 partially released. After opening the rest of the tool 5, the press fitting 3 can now be removed.
  • the Tool part 5a the two other parts of the tool. 5 on the seat 50 holds together and here in particular in Area of the annular groove 14 in a simple way a precise working Tool can build.
  • FIGS and FIG. 9 A modified embodiment of the in Figure 6 and 7 illustrated device 1 is shown in FIGS and FIG. 9. While in the above-described embodiment ( Figures 6 and 7) of the expansion mandrel 18 and the upsetting element 19 is movable relative to the tool part 5 guided and driven, is the expansion mandrel 18 in the embodiment of the device 1 according to the figures 8 and 9 rigidly on the tool part 5a held and the upsetting element 19 is as annular Pressure surface 25 'formed on the tool part 5a. This is altogether with a not further illustrated Drive device connected and in the direction of Arrows 31, 32 selectively movable.
  • the tool part 5a has following its Half 14b of the annular groove 14, the other half 14a in the rest of the tool 5 is housed, a bore 52nd on, which is at a certain distance to the ring half 14b to the diameter of the expansion mandrel 18th reduced. This penetrates the rest of the bore 52. An his end he is provided with an end plate 18 ', the clamped by the tool part 5a against an abutment 53 is. The thus formed unit of abutment 53, Tool part 5a and expansion mandrel 18 is by means of Drive device as a whole on the tool 5 back and moving away from it.
  • the distance between the ring surface 25 'and the annular groove 14 is in turn dimensioned that the widened pipe end 9 when closing the mold 5, 5a is compressed so far that the bulging Pipe wall just filling the closing annular groove 14. This is illustrated in FIG. It will be here with you a total of three-part form and a single drive device both for the expansion mandrel 18 as also the compression element 25 'worked.
  • Such a stainless steel press fitting is made of a welded Pipe piece manufactured, the weld 60th is illustrated schematically in Figure 10. He points one, two or more pipe connection portions 61, 62, the are formed in total hollow cylindrical. Each pipe connection area 61, 62 has two hollow cylindrical sections 61a, 61b; 62a, 62b on, between each one the annular bead 15 is arranged. The two cylindrical ones Sections 61a, 61b; 62a, 62b have the same inner diameter on. They form pinch areas for connection of pipes. The pipes to be connected are then on both sides of the respective O-ring 63 mechanically with connected to the press fitting 2.
  • the presented method allows the production of stainless steel pressfittings virtually in one Operation involving two process steps, the at the same time or in succession.
  • the cut to length Blank is widened in a tool and compressed to the desired pipe connection areas 61, 62 train.
  • the process has been designed for stainless steel pressfittings proved to be reliable. It can Other pressure-resistant and tough metals for use come.
  • the method is particularly suitable in connection with a downstream Rollier Murphy or Grinding step for the production of press fittings from welded Stainless steel tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Clamps And Clips (AREA)
  • Automatic Assembly (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (16)

  1. Procédé de fabrication de raccords à sertir en métal à partir d'ébauches (3) ayant chacune au moins une extrémité tubulaire (9), comprenant :
    une première étape, au cours de laquelle au moins l'extrémité tubulaire (9) est reçue par un outil (5) et est élargie à l'aide d'un mandrin d'élargissement (18), dont le diamètre extérieur est supérieur au diamètre intérieur de l'extrémité tubulaire (9), en faisant glisser le mandrin d'élargissement (18) dans la direction axiale dans l'extrémité tubulaire (9), et
    une deuxième étape, au cours de laquelle l'extrémité tubulaire (9) est déformée dans le même outil (5), immédiatement après la première étape du procédé, aux fins de réaliser une gorge annulaire,
       caractérisé en ce que l'ébauche (3) est en acier allié et en ce que l'extrémité tubulaire (9) élargie est refoulée dans la direction axiale dans une portion située dans l'outil (5), aux fins d'écarter une zone annulaire de l'extrémité tubulaire (9) radialement vers l'extérieur et la faire pénétrer dans une gorge annulaire (14) aménagée dans l'outil (5).
  2. Procédé de fabrication de raccords à sertir, caractérisé en ce que, au cours de la première étape, le diamètre de l'extrémité tubulaire (9) est élargi d'une valeur correspondant à plus du double de l'épaisseur de paroi de l'extrémité tubulaire (9).
  3. Procédé de fabrication de raccords à sertir, caractérisé en ce que le mandrin d'élargissement (18), qui a été engagé dans l'extrémité tubulaire (9) au cours de la première étape, reste dans l'extrémité tubulaire (9) pendant l'exécution de la deuxième étape.
  4. Procédé de fabrication de raccords à sertir, caractérisé en ce que l'ébauche (3) est réalisée à partir d'un tube en acier allié soudé.
  5. Procédé de fabrication de raccords à sertir, caractérisé en ce que l'ébauche (3) utilisée est un tronçon coupé à longueur dans un tube en acier allié soudé.
  6. Dispositif (1) de fabrication de raccords à sertir en acier allié suivant le procédé selon une des revendications 1 à 5, comprenant un poste combiné d'élargissement et de refoulement (22) qui comporte au moins les éléments suivants :
    un outil (5) en plusieurs parties qui présente un espace récepteur (6) pour l'ébauche (3), ledit espace récepteur (6), pour recevoir l'extrémité tubulaire (9) de l'ébauche (3), présentant au moins un premier segment (7) de même diamètre que l'ébauche (3) et un deuxième segment (8) dont le diamètre intérieur est supérieur au diamètre extérieur de l'extrémité tubulaire (9), le deuxième segment (8) présentant dans sa surface intérieure une gorge annulaire (14) destinée à définir la forme extérieure d'une moulure annulaire devant être réalisée sur l'extrémité tubulaire (9);
    un mandrin d'élargissement (18) qui est guidé de manière à pouvoir être avancé axialement dans le segment (8) de l'espace récepteur (6) et en être retiré, qui est relié à un moyen d'entraínement (21) et dont le diamètre extérieur est supérieur au diamètre intérieur de l'extrémité tubulaire (9) mais est inférieur au diamètre intérieur du segment (8) dans lequel le mandrin d'élargissement (18) doit être engagé, de sorte qu'il existe entre le mandrin d'élargissement (18) et la surface intérieure du segment (8) un espace annulaire dont la largeur radiale correspond sensiblement à l'épaisseur de paroi du raccord ç sertir (3), et
    un élément de refoulement (19) qui est guidé de manière à pouvoir être déplacé axialement en direction de la gorge annulaire (14) de l'outil (5) et dans la direction opposée, qui est relié à un moyen d'entraínement (21) et présente une surface de poussée (25) annulaire qui est conçue pour être amenée en appui contre l'extrémité tubulaire (9) et effectuer le refoulement de ladite extrémité tubulaire (9).
  7. Dispositif selon la revendication 6, caractérisé en ce que l'espace intérieur (6) de l'outil (5) présente un épaulement annulaire (11) entre le premier segment (7) et le deuxième segment (8).
  8. Dispositif selon la revendication 6, caractérisé en ce que l'outil (5) est réalisé en deux parties et est divisé le long d'une surface qui est parallèle à la direction longitudinale de tube (16) du raccord à sertir (9).
  9. Dispositif selon la revendication 6, caractérisé en ce que l'outil (5) est divisé transversalement à la direction longitudinale de tube (16) de l'ébauche (3).
  10. Dispositif selon la revendication 6, caractérisé en ce que le mandrin d'élargissement (18) est relié à son moyen d'entraínement (21b) par l'intermédiaire d'un moyen à ressort (41).
  11. Dispositif selon la revendication 6, caractérisé en ce que le mandrin d'élargissement (18) est relié de manière rigide à son moyen d'entraínement (21).
  12. Dispositif selon la revendication 6, caractérisé en ce que le mandrin d'élargissement (18) est relié de manière rigide à l'élément de refoulement (19) et que le moyen d'entraínement (21) du mandrin d'élargissement (18) sert en même temps de moyen d'entraínement (21) pour l'élément de refoulement (19).
  13. Dispositif selon la revendication 6, caractérisé en ce que l'élément de refoulement (19) et le mandrin d'élargissement (18) présentent des moyens d'entraínement (21a, 21b) indépendants l'un de l'autre.
  14. Dispositif selon la revendication 6, caractérisé en ce qu'une partie (5a) de l'outil (5) est liée rigidement aussi bien au mandrin d'élargissement (18) qu'à l'élément de refoulement (19).
  15. Dispositif selon la revendication 6, caractérisé en ce que le dispositif (1) comprend en outre un moyen de roulage (34)
  16. Dispositif selon la revendication 6, caractérisé en ce que le dispositif comprend en outre un poste de meulage avec une meule qui peut être engagée dans l'extrémité tubulaire (9) et amenée par un déplacement radial dans la moulure annulaire (15) afin d'y effectuer une opération de meulage.
EP01933971A 2000-06-30 2001-05-16 Procede et dispositif pour la production de raccords tubulaires a la presse en acier, notamment en acier special Expired - Lifetime EP1294501B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10031989A DE10031989B4 (de) 2000-06-30 2000-06-30 Verfahren und Vorrichtung zur Herstellung von Pressfittings aus Stahl, insbesondere Edelstahl
DE10031989 2000-06-30
PCT/EP2001/005547 WO2002002255A1 (fr) 2000-06-30 2001-05-16 Procede et dispositif pour la production de raccords tubulaires a la presse en acier, notamment en acier special

Publications (2)

Publication Number Publication Date
EP1294501A1 EP1294501A1 (fr) 2003-03-26
EP1294501B1 true EP1294501B1 (fr) 2005-08-10

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EP01933971A Expired - Lifetime EP1294501B1 (fr) 2000-06-30 2001-05-16 Procede et dispositif pour la production de raccords tubulaires a la presse en acier, notamment en acier special

Country Status (13)

Country Link
US (1) US6843096B2 (fr)
EP (1) EP1294501B1 (fr)
JP (1) JP2004501773A (fr)
CN (1) CN1208145C (fr)
AT (1) ATE301513T1 (fr)
BR (1) BR0111978B1 (fr)
CZ (1) CZ20024128A3 (fr)
DE (2) DE10031989B4 (fr)
DK (1) DK1294501T3 (fr)
ES (1) ES2247111T3 (fr)
PT (1) PT1294501E (fr)
SK (1) SK286457B6 (fr)
WO (1) WO2002002255A1 (fr)

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CN102343379A (zh) * 2010-07-22 2012-02-08 名古屋技研工业株式会社 软管用管接头的制造方法
EP4316682A1 (fr) 2022-08-04 2024-02-07 Gnutti Transfer S.p.A. Appareil pour l'usinage mécanique des perles et machine de transfert correspondante comprenant cet appareil

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WO2005061148A1 (fr) * 2003-11-28 2005-07-07 Witzig & Frank Gmbh Procede et dispositif pour fabriquer un manchon sur un tube
US20110124421A1 (en) * 2003-12-03 2011-05-26 Christine Kienhofer Method for producing a tubular drive shaft, in particular a cardan shaft for a motor vehicle
US20070251684A1 (en) * 2006-04-27 2007-11-01 Burnham Services, Inc. Watertube and Method of Making and Assembling Same within a Boiler or Heat Exchanger
US20100071635A1 (en) * 2006-04-27 2010-03-25 Burnham Holdings, Inc. Watertube and method of making and assembling same within a boiler or heat exchanger
WO2007132799A1 (fr) * 2006-05-15 2007-11-22 Komatsu Ltd. Procédé de moulage par expansion et dipositif de moulage par expansion pour tube d'acier
JP4941054B2 (ja) * 2007-03-30 2012-05-30 住友金属工業株式会社 継目無ベンド管の製造方法並びに溶接継手及びその製造方法
DE102007024357B3 (de) * 2007-05-24 2008-10-09 Witzig & Frank Gmbh Verfahren und Vorrichtung zur Herstellung von Rohranschlüssen
US7987690B2 (en) * 2008-01-04 2011-08-02 Cerro Flow Products Llc Fluid conduits with integral end fittings and associated methods of manufacture and use
US7942456B2 (en) * 2008-01-04 2011-05-17 Cerro Flow Products, Inc. Fluid conduits with integral end fittings and associated methods of manufacture and use
DE102009007303B4 (de) 2009-02-03 2023-05-04 Viega Technology Gmbh & Co. Kg Fitting für dickwandige Rohre
US20100313828A1 (en) * 2009-06-12 2010-12-16 Burnham Services, Inc. Watertube, Header and Watertube Assembly, Boiler having the Assembly, and Method of Assembling Same
DE102009044279B4 (de) * 2009-10-16 2013-11-21 Mag Europe Gmbh Verfahren zur Herstellung eines Wandanschlussstücks und zugehöriges Wandanschlussstück
US20110220321A1 (en) * 2010-02-25 2011-09-15 Kevin Bryan Hawthorne Geothermal tank vault with transition fittings
CN102371469A (zh) * 2010-08-17 2012-03-14 龙泰兴业有限公司 跳床套管的加工方法
EP2428289B1 (fr) * 2010-09-08 2013-04-03 Crowntec Fitness MFG., Ltd. Procédé de fabrication de manchons pour trampolines
CN101972791B (zh) * 2010-10-18 2014-07-16 宁波市华涛不锈钢管材有限公司 薄壁不锈钢三通管件冷压成形装置及成形方法
MX364975B (es) 2010-12-02 2019-05-16 Victaulic Co Of America Elemento de tuberia que tiene escalon, garganta y cordon y metodos y aparato para la fabricacion del mismo.
CN102950217B (zh) * 2011-08-29 2015-08-12 珠海格力电器股份有限公司 异型管端的成型方法及所用的异型夹模模具
ES2548775T3 (es) 2011-09-02 2015-10-20 Victaulic Company Procedimiento y dispositivo para moldear por centrifugación
JP2013244506A (ja) * 2012-05-25 2013-12-09 Hitachi Automotive Systems Ltd チューブの加工装置及び加工方法
US9199295B2 (en) * 2012-09-10 2015-12-01 The Boeing Company Roller swage method and apparatus
JP2014069210A (ja) * 2012-09-28 2014-04-21 Hitachi Automotive Systems Ltd チューブの加工方法及び緩衝器
CN103990657B (zh) * 2014-05-29 2015-11-25 江阴市扬子管件有限公司 90度直段墩粗增厚弯管成型法
US9551445B2 (en) 2014-06-09 2017-01-24 Cooper Technologies Company Conduit receivers
US10302230B2 (en) 2014-06-09 2019-05-28 Eaton Intelligent Power Limited Field serviceable conduit receivers
DE102017102139B3 (de) 2017-02-03 2018-03-29 Benteler Automobiltechnik Gmbh Umformwerkzeug zur Herstellung eines Hohlbauteils sowie Verfahren zur Herstellung eines Umformbauteils
US11088515B2 (en) 2017-08-31 2021-08-10 Eaton Intelligent Power Limited Press fitting for electrical conduit
US11398719B2 (en) 2019-04-30 2022-07-26 Eaton Intelligent Power Limited Press fit condulet devices, assemblies systems and methods for electrical raceway fabrication
CN113399491B (zh) * 2021-06-03 2022-06-21 浙江长兴和良智能装备有限公司 一种多工位式管端挤鼓成型设备、系统及复合模具组件

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CN102343379A (zh) * 2010-07-22 2012-02-08 名古屋技研工业株式会社 软管用管接头的制造方法
CN102343379B (zh) * 2010-07-22 2014-07-02 名古屋技研工业株式会社 软管用管接头的制造方法
EP4316682A1 (fr) 2022-08-04 2024-02-07 Gnutti Transfer S.p.A. Appareil pour l'usinage mécanique des perles et machine de transfert correspondante comprenant cet appareil

Also Published As

Publication number Publication date
US20040003645A1 (en) 2004-01-08
WO2002002255A1 (fr) 2002-01-10
DK1294501T3 (da) 2005-11-28
ATE301513T1 (de) 2005-08-15
DE10031989B4 (de) 2007-08-16
US6843096B2 (en) 2005-01-18
SK18012002A3 (sk) 2003-09-11
JP2004501773A (ja) 2004-01-22
EP1294501A1 (fr) 2003-03-26
DE10031989A1 (de) 2002-01-17
CN1208145C (zh) 2005-06-29
CN1438923A (zh) 2003-08-27
ES2247111T3 (es) 2006-03-01
PT1294501E (pt) 2005-11-30
DE50107057D1 (de) 2005-09-15
CZ20024128A3 (cs) 2003-09-17
SK286457B6 (sk) 2008-10-07
BR0111978A (pt) 2003-07-01
BR0111978B1 (pt) 2008-11-18

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