EP4251372A1 - Outil de pression radiale - Google Patents

Outil de pression radiale

Info

Publication number
EP4251372A1
EP4251372A1 EP21810528.6A EP21810528A EP4251372A1 EP 4251372 A1 EP4251372 A1 EP 4251372A1 EP 21810528 A EP21810528 A EP 21810528A EP 4251372 A1 EP4251372 A1 EP 4251372A1
Authority
EP
European Patent Office
Prior art keywords
pressing tool
radial pressing
workpiece
radial
passage gap
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.)
Pending
Application number
EP21810528.6A
Other languages
German (de)
English (en)
Inventor
Sabrina RÜTH
Dennis Hesse
Maximilian Gottschalk
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.)
Rothenberger AG
Original Assignee
Rothenberger AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rothenberger AG filed Critical Rothenberger AG
Publication of EP4251372A1 publication Critical patent/EP4251372A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements

Definitions

  • the present disclosure relates to a radial compression tool for making tube connections and in particular to a compression ring and compression tongs for this purpose and methods of using the same.
  • Conventional radial pressing tools in particular the radial pressing tools referred to as pressing tongs, pressing rings and pressing slings are designed to convert a workpiece and in particular an assembly of a pipe end piece and a connection piece, e.g. a fitting, from an original oversize shape into to reshape a given final shape.
  • the change in shape associated with the deformation can include a radial and/or axial deformation of the assembly or individual parts thereof. Alternately or cumulatively, the change in shape may also include a relocation of parts of the assembly relative to each other. Further details in this regard are disclosed in publications DE 10144 100 CI, DE 102008010083 A1, to which reference is made here for the purpose of supplementing the disclosure with the note that the publications cited may give identical terms a meaning that differs from the present one.
  • Radial pressing tools often act on more than 180° of the circumference of the workpiece and must therefore be set up to be able to form the passage gap required for attaching and removing the radial pressing tool on or from the workpiece. In some cases, this is achieved structurally by a multi-part, coherent design of the radial pressing tool.
  • the mobility of the individual members relative to one another is dimensioned in such a way that the passage gap required for the stated purposes is present in at least one setting.
  • the radial press tools are two-part press rings with only one joint and two links connected therein.
  • the die required for forming can be formed by several die elements that are arranged on the members. In one setting of the links, the die elements can form a more or less continuously defined die bore.
  • the links there is a sufficient gap for the workpiece to pass through at least between two die elements.
  • the radial pressing tools are three-part pressing pliers, in which two levers equipped with matrix elements are connected to one another via a strap.
  • the pressing tools are press chains or press slings with three or more links.
  • a multi-part, movably constructed radial pressing tool that is set up to group several die elements in a ring shape into a bore die in a closed setting and to form a variable passage gap for a workpiece in open settings between two die elements, with the radial pressing tool in an open setting in the area of the passage gap has a number of surface features with which, when the radial pressing tool is pushed onto a workpiece with a collar or a bulge, a form fit with the collar or the bulge can be produced if the radial pressing tool is positioned relative to the workpiece in the intended axial direction working position is.
  • the form fit can be on one side or on both sides. In both cases, a user can tactilely find the axial working position via the form fit, from which the radial pressing tool can be moved by a displacement running essentially radially to the die bore into the working position in which the workpiece is formed by closing the radial pressing tool against its structural resistance .
  • the improved radial swage tool may further be configured such that the die bore formed by the die elements in the closed setting is axially profiled and specifically includes a circular groove for receiving a ridge on the workpiece.
  • the improved radial swage tool may further be configured such that the surface features are arranged such that when it is mated with the bead of the workpiece, the groove is radially aligned with the bead.
  • the improved radial pressing tool can also be designed in such a way that the surface features are arranged in the intermediate space and/or on the end face of the passage gap.
  • the improved radial pressing tool can also be designed in such a way that the grooves or slits continue into one end face at the passage gap.
  • the further improved radial pressing tool can also be designed in such a way that several links are movably connected in pairs with one another by joints and the parts of the locking device intended for overcoming this mobility are assigned to the respective joint and in particular are integrated into the respective joint.
  • the further improved radial pressing tool can also be designed such that a latching position predetermined by the latching device is in a partially open setting in which the width of the passage gap is not sufficient for pushing through a workpiece suitable for machining with the axially profiled die bore.
  • the further improved radial pressing tool can also be designed in such a way that a latching position predetermined by the latching device is in a fully open setting in which the width of the passage gap is sufficient for pushing through a workpiece suitable for machining with the bore die while maintaining the latching position.
  • the further improved radial pressing tool can also be provided with a prestressing device and in particular a closing spring, the prestressing of which is directed towards the contraction of the passage gap in at least one open position.
  • the further improved radial pressing tool can be a particularly two-part press ring, a particularly three-part press sling or a particularly three-part press pliers.
  • the further improved radial pressing tool can have a hanging or attachment point for a safety cable, particularly in the form of a two-part pressing ring.
  • this hanging or attachment point can be arranged in particular in the area of a joint point between the movable members.
  • the hanging or attachment point can be an eyelet or a flake.
  • adapter tongs for driving a press ring or a press sling by means of an electrohydraulic press machine
  • the adapter tongs further comprising devices for attaching the press ring or press sling via a safety cable or an equivalent endzugrigist connection.
  • the connection which is rigid at the end of tension can comprise a safety cable.
  • the arresting rope can be attached in a retractor, from which a limited length of the arresting rope can be pulled out against a preset spring force.
  • Still further advances result in principle in a method for forming a workpiece with a bead by means of a radial pressing tool specified above and a drive device for its actuation, the method comprising steps for providing the radial pressing tool in a first setting in which the width of the passage gap is not sufficient for pushing through the workpiece intended for processing; to attach the Pass-through gap on the bead of the workpiece and alignment of the radial pressing tool on the bead by means of the surface features present on the pass-through gap on the intended machining position; for sliding the radial pressing tool over the bead of the workpiece while widening the passage gap against a closing force; and for bringing the radial pressing tool into the closed setting while deforming the workpiece picked up by the die elements by means of the drive device.
  • FIG. 1 shows a side view of a first exemplary embodiment of a radial press tool in the configuration of a two-part press ring in the closed setting;
  • FIG. 2 shows a view of the two-part press ring in a first setting according to FIG. 1 from the front side;
  • FIG. 5 shows a sectional view of the detail “X” from the two-part press ring according to FIG. 1 in the plane of the sectional plane according to FIG. 3;
  • FIG. 6 shows a sectional view of the detail “X” from the two-part press ring according to FIG. 1a in the sectional plane according to FIG. 4;
  • FIGS. 1-3 is a side view of the two-piece ferrule of FIGS. 1-3 in a second position in abutting contact with a straight fitting and tube end assembly;
  • FIG. 9 is a side view of the two-piece ferrule of FIGS. 1-3 in a third position in gripping contact with a straight fitting and tube end assembly;
  • FIG. 10 shows a plan view of the arrangement according to FIG. 9;
  • FIG. 12 shows a side view of a tool safety device in the arrangement according to FIG. 11;
  • FIG. 13 shows a side view of a second exemplary embodiment of a radial pressing tool in the configuration of a three-part pressing tongs in the closed setting
  • Figure 15 is a sectional view of detail "Y" from the three-part crimping pliers of Figure 13 in a partially open position.
  • exemplary embodiments
  • FIG. 1 to 6 show the structure of a first exemplary embodiment of a radial press tool 1, which is generically referred to as a press ring 1 in technical circles and here.
  • the exemplary press ring 1 comprises two curved legs 2, 3, each of which is connected to one another at one end by a joint so that it can pivot about an axis A.
  • the joint of the exemplary press ring 1 is formed by a bolt 4 which is inserted into aligned bores of end brackets 5, 6 interlaced like a comb on the legs 2, 3.
  • the exemplary press ring 1 has two connection points 7, 8 for a drive device on the free ends of the legs 2, 3 protruding from the joint. About these connection points 7, 8, the energy required for forming a workpiece can be introduced into the exemplary press ring 1 who the.
  • the connection points 7, 8 are set up for a pincer-like attack on a special drive device and specifically designed as conical caps.
  • a drive device compatible with these connection points 7, 8 could, for example, include spherical pressure bolts in order to compensate for the changes in the angle of attack at the connection points 7, 8 that occur when the legs 2, 3 are pivoted.
  • the exemplary press ring 1 has two parts in the sense that the force-conducting structure running between the two connection points 7, 8 comprises only the legs 2, 3 and the joint.
  • a flat matrix is integrally formed as a matrix element 9 or 10, respectively.
  • the matrix elements 9, 10 are designed in such a way that, in the closed setting of the legs 2, 3, in particular according to FIG. 1, they come together to form a profiled bore matrix.
  • the bore matrix of the exemplary press ring 1 is defined in the closed setting except for rounded edges over the entire planar circumferential angle and reveals three different profile sections in the axial direction, in particular with a view to FIGS. 3 and 4, which are explained below.
  • a first profile section which is, for example, in the middle of the die bore, defines a rounded groove 11 that is essentially circular.
  • This groove 11 is followed on both sides by second, exemplarily similar profile sections, which generally define essentially short, cylindrical bore sections 12, 13.
  • second profile sections 12, 13 and the outlet openings from the die bore from the press ring 1 are provided on both sides, which define a total of two hexagons 14, 15 of the same size and orientation in the exemplary embodiment.
  • the exemplary press ring 1 has a number of surface features 18, 19 adjacent to the outer closing surfaces 17, which are embodied as wedge-shaped recesses 18, 19, which are pronounced towards the end face. Between the beginning of the recesses 18, 19 and the die bore, a sufficiently wide one can be used according to the exemplary embodiment Section of the outer closing surfaces 17 remain. Due to the wedge-shaped depth of the recesses 18, 19, which increases towards the end face, these can form a positioning aid in a partially open setting of the exemplary press ring, which will be discussed in more detail in the context of the explanations for FIGS.
  • a closing spring 21 is inserted in the exemplary press ring 1 in an enlarged intermediate space 20 between the comb-like end plates 4, 5, which is supported on each of the legs 2, 3 in a recess 22 or 23 suitably arranged there.
  • the closing spring 21 is set up in the exemplary press ring 1 to spring-bias the two legs 2, 3 towards the closed setting according to FIG.
  • a blind hole 24 is also introduced in the upper leg 2 of the exemplary press ring 1, which receives a ball 25, which is biased by a compression spring 26 behind it to open the blind hole 24 out.
  • the ball 25 is supported against a surface on the lower leg 3 of parent and to the axis of the bolt 4 is substantially concentric arcuate surface 27 from.
  • the running surface 27 has two angularly offset depressions 28, 29 are arranged.
  • this In a relative pivoting movement of the angle's 2, 3 slides or rolls the ball 25 on the running surface 27 from.
  • this In the area of the arched shape of the running surface 27, this generates a small moment of friction which opposes the movement.
  • the recesses 28, 29, there is a pronounced cogging moment which is directed toward the lowest position of the ball 25 in the relevant recess 28, 29, regardless of the direction of movement.
  • the force exerted by the closing spring 21 on the legs 2, 3 is dimensioned in all settings of the legs 2, 3 so that the torque generated thereby overcomes the previously mentioned frictional moment of the ball 25, but behind its detent ment in the recesses 28, 29 remains.
  • the exemplary swage ring 1 will maintain each of the two detent positions in which the ball 16 resides in one of the two indentations 28,29.
  • the press ring 1 will not be retained in other, non-closed settings outside of the detent positions.
  • configurations of the closing spring 21, the compression spring 26 and the depressions 28, 29 are possible with which the exemplary press ring 1 automatically returns to the closed setting from any setting that does not correspond to a latching position.
  • Such a design can enable a user to first bring the exemplary press ring 1 into one of the two exemplary locking positions in order to subsequently overcome them with a slight influence.
  • such a design ensures that the exemplary die 1 will remain in or return to the closed position during storage and shipping. This can sometimes be helpful in order to avoid damaging the surfaces of the matrix elements 9, 10.
  • the exemplary press ring 1 can be used in a manner known per se to produce a positive connection between an assembly of a fitting 31 and a pipe end piece 32 .
  • the exemplary press ring 1 and comparably constructed radial press tools are often attached to the workpiece separately from the drive device required to generate the actuating force. Only then is the drive device connected. This can be helpful for the user when the work situation would restrict maneuvering with the drive device for the purpose of aligning the radial pressing tool on the workpiece. In particular, the user's attention can now be fully concentrated on correctly applying the exemplary press ring 1 to the workpiece.
  • the user will use the pivotable connection between the two legs 2, 3 of the exemplary press ring 1 to come from a radial direction around the workpiece 30 to be machined and in particular around the assembly shown of a fitting 31 and a pipe end piece 32, to be arranged gripping around.
  • This procedure will be considered in particular if it is not possible to slide the press ring 1 in an axial direction.
  • the exemplary press ring 1 can assume the first latching position 28 according to FIG. 5 in a first partially open setting at the beginning of the application to the workpiece 30 .
  • the user can, for example, adjust the exemplary press ring 1 to the first latching position 28 before moving it to the workpiece 30 .
  • the exemplary press ring 1 will retain this setting as long as no significant external forces act towards a relative pivoting of the legs 2, 3.
  • the user can bring the exemplary compression ring 1 with its front side up to the workpiece 30 until it makes contact, which is illustrated schematically in FIG. 7 .
  • the bead 33 on the fitting 31 will be aligned with the recesses 18, 19. From an alignment that is slightly axially offset from this correct position, the user will be able to easily find the correct alignment by slightly laterally displacing the example press ring 1 on the bead 33 of the fitting 31 . As soon as the exemplary press ring 1 reaches the correct position, the bead 33 of the fitting 31 will noticeably dip into the prismatic depression formed by the recesses 18, 19. This process can provide a vigilant user with useful tactile feedback as to the proper alignment between the exemplary die 1 and the workpiece 30 .
  • the user can press the exemplary press ring 1 more firmly against the workpiece 30 in order to overcome the latching position according to FIG. 8 and open the legs 2, 3 further.
  • the prestressing force of the closing spring 21 can contribute to the outer ends of the legs 2, 3 maintaining contact with the workpiece 30 continuously.
  • the recesses 18, 19, which continue inwards close to the die bore, allow the user to maintain the lateral form fit of the exemplary pressing tool 1 with the bead 33 of the fitting 31 until it overflows the short section of the outer closing surfaces 17 and into the groove 11 runs into the die bore.
  • the user can support this by slightly squeezing the legs 2, 3 together and thereby attaching the exemplary press ring 1 in the correct position on the workpiece 30. Then, according to the schematic illustration in FIGS. 9 and 10, the bead 33 of the fitting 31 will lie in the groove 11 of the die bore.
  • the exemplary press ring 1 can in particular be set up to provide a sufficiently large closing force through the closing spring 21, which holds the leg 3 shown below in FIGS. 7 to 10 securely in abutment against the workpiece against the weight acting on it in a real situation.
  • a sufficiently large dimensioned closing force can counteract the unintentional stripping of the exemplary press ring 1 from the workpiece 30 when the drive device is applied.
  • the pressure pins 37 can in particular be designed to be hemispherical in order to enable the angle between the plane of the exemplary pressing tool 1 and the plane of the legs 35, 36 of the adapter tongs 34 to be freely selected within limits. Further details and possible configurations are disclosed in the publications EP 1 201371 B1, EP 1 972 394 B1 and EP 2 230049 B1, to which reference is also made here for the purpose of completeness and supplementation of the disclosure, with the note that terms that are the same there may have a different meaning interpretation is attached.
  • FIG. 12 it can be useful in certain applications to attach the press ring selected for the work to the adapter tongs or the press machine with a connection that is rigid at the end of tension, in order to prevent the press ring from falling off due to careless handling.
  • This measure can be prescribed in particular as fall protection when working on roofs and scaffolding, in order to protect people below the work site from injury from falling objects.
  • fall protection can be limited to equipping the press ring and adapter tongs with eyelets to which the ends of a short arresting rope are attached. The stop can be released on one side or on both sides.
  • the detachable stop can be realized by snap hooks, spring hooks or folding eyelets, in particular in order to correspond to a possible mechanical compatibility of the adapter tongs with several different compression rings.
  • a further developed exemplary press ring 1' is equipped with a semicircular eyelet 4a on the head of the bolt 4, which allows a safety cable 38 to be attached.
  • FIGS. 14 and 15 show the structure of a second exemplary embodiment 40 of a radial pressing tool, which is generically referred to in technical circles and here as pressing pliers. Furthermore, FIGS. 14 and 15 symbolize a special possibility for handling the exemplary pressing tongs 40.
  • the recesses 48, 49 can be formed as grooves or grooves.
  • the recesses can be arcuate or prismatic in order to enable positive locking in two directions.
  • a user can bring the exemplary pressing tongs 40 in the closed setting from an approximately radial direction until they come into contact with the bead 33 of the fitting 31 and look for the tactile form fit between the bead 33 and the recesses there.
  • the operator can slowly open the exemplary pressing tongs 40 while maintaining contact and slide the front ends over the fitting.
  • the positive connection between the bead 33 and the recesses will help the operator not to lose the previously found axial alignment of the exemplary pressing tongs 40 in relation to the fitting 31 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)

Abstract

Selon l'invention, pour simplifier la manipulation d'un outil de pression radiale mobile, à plusieurs éléments, qui lorsqu'il est fermé, regroupe plusieurs éléments matriciels en un anneau pour former une matrice d'alésage et qui, lorsqu'il est ouvert, forme un espace de passage variable pour une pièce entre deux éléments matriciels, ledit outil de pression radiale possédant lorsqu'il est ouvert un certain nombre de caractéristiques de surface dans la zone de l'espace de passage, et lesdites caractéristiques de surface permettant, lorsque l'outil de pression radiale est poussé sur une pièce possédant un collet ou un bourrelet, de créer une complémentarité de forme avec le collet ou le bourrelet lorsque l'outil de pression radiale se trouve dans la position de travail axiale souhaitée par rapport à la pièce. L'outil de pression radiale peut également comprendre un dispositif d'encliquetage qui est conçu pour définir une position d'encliquetage pouvant être déplacé dans un certain nombre de positions ouvertes, l'une pouvant être une position partiellement ouverte dans laquelle la pièce ne peut pas passer à travers l'espace de passage.
EP21810528.6A 2020-11-24 2021-11-08 Outil de pression radiale Pending EP4251372A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020007188 2020-11-24
PCT/DE2021/100886 WO2022111753A1 (fr) 2020-11-24 2021-11-08 Outil de pression radiale

Publications (1)

Publication Number Publication Date
EP4251372A1 true EP4251372A1 (fr) 2023-10-04

Family

ID=78695427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21810528.6A Pending EP4251372A1 (fr) 2020-11-24 2021-11-08 Outil de pression radiale

Country Status (3)

Country Link
EP (1) EP4251372A1 (fr)
DE (1) DE112021006112A5 (fr)
WO (1) WO2022111753A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022115433A1 (de) 2022-06-21 2023-12-21 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kommanditgesellschaft Pressring, Pressschlinge und Presswerkzeug mit Verstellelement

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29714629U1 (de) 1997-08-16 1997-10-30 Novopress Gmbh Preßgerät
DE20018312U1 (de) 2000-10-26 2001-05-10 Franz Viegener Ii Gmbh & Co Kg Preßwerkzeug
DE10144100C1 (de) 2001-09-04 2003-02-13 Mapress Gmbh & Co Kg Verfahren und Vorrichtung zur Herstellung einer Rohrpressverbindung
DE20318345U1 (de) 2003-11-25 2004-02-26 Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg Werkzeug für handgeführte Preßgeräte
DE102007013706B3 (de) 2007-03-22 2008-11-13 Rothenberger Ag Verpressvorrichtung für rohrförmige Werkstücke
DE102007047339A1 (de) * 2007-10-04 2009-04-09 Novartec Ag Presswerkzeug und Presseinrichtung
DE102008010083A1 (de) 2008-02-19 2009-08-27 Viega Gmbh & Co. Kg Verfahren zum unlösbaren Verbinden von Werkstücken, Presswerkzeug sowie Aufsatz für ein Presswerkzeug
DE102009012199B3 (de) 2009-03-07 2010-06-10 Rothenberger Ag Verpressvorrichtung für rohrförmige Werkstücke
DE102013112848B3 (de) 2013-11-21 2015-04-23 Viega Gmbh & Co. Kg Presswerkzeug mit bistabilem Spannungsmechanismus
DE102014112869B3 (de) 2014-09-08 2016-01-07 Viega Gmbh & Co. Kg Presswerkzeug mit zuschaltbarem bistabilen Spannmechanismus
DE102018118677A1 (de) 2018-08-01 2020-02-06 Gustav Klauke Gmbh Verfahren zum Betrieb eines hydraulisch betätigten Arbeitsgerätes

Also Published As

Publication number Publication date
WO2022111753A1 (fr) 2022-06-02
DE112021006112A5 (de) 2023-09-28

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