EP2956254A1 - Outil de bordage pour élargir des extrémités de tubes cylindriques - Google Patents

Outil de bordage pour élargir des extrémités de tubes cylindriques

Info

Publication number
EP2956254A1
EP2956254A1 EP14704158.6A EP14704158A EP2956254A1 EP 2956254 A1 EP2956254 A1 EP 2956254A1 EP 14704158 A EP14704158 A EP 14704158A EP 2956254 A1 EP2956254 A1 EP 2956254A1
Authority
EP
European Patent Office
Prior art keywords
clamping
control sleeve
clamping jaws
pipe
flaring
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.)
Granted
Application number
EP14704158.6A
Other languages
German (de)
English (en)
Other versions
EP2956254B1 (fr
Inventor
Florian GOOP
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.)
Georg Fischer JRG AG
Original Assignee
Georg Fischer JRG 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 Georg Fischer JRG AG filed Critical Georg Fischer JRG AG
Publication of EP2956254A1 publication Critical patent/EP2956254A1/fr
Application granted granted Critical
Publication of EP2956254B1 publication Critical patent/EP2956254B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Definitions

  • the invention relates to a crimping attachment for widening cylindrical pipe ends for an automatically operable hand tool according to the preamble of claim 1.
  • the invention also relates to a set of such crimping attachments for different pipe diameters.
  • flare fittings are often used.
  • the cylindrical tubes often copper tubes, provided with a special union nut.
  • the pipe end is widened conically with a flaring tool adapted to the pipe diameter.
  • the union nut With the union nut, the pipe is screwed to the flare flange without any further sealant.
  • This connection technology is used for example in refrigeration technology. But also in the automotive sector, this technique is used among other things in the detachable connection of brake lines.
  • a crimping device which can be designed as an attachment which can be fastened to an electrically driven hand drilling device.
  • the adapter has two plate-shaped clamping jaws, between which a tube can be clamped.
  • the two plate-shaped clamping jaws can be screwed together or clamped together via other clamps.
  • the two plate-shaped clamping jaws are equipped with mutually corresponding half-shell-shaped receptacles for a tube.
  • For the determination of tubes of different diameters each have several different sized half-shell-shaped receptacles are recessed in the plate-shaped jaws.
  • a threaded rod In a threaded bore opposite a receptacle, a threaded rod is rotatably mounted, at the front end of which a flanging iron or an expander device is arranged.
  • a flanging iron or an expander device By turning the threaded rod the crimping iron is delivered to the pipe end to be expanded.
  • the turning of the threaded rod for example, by means of the spindle drive of the hand drill.
  • the handling of this designed as an attachment crimping device is relatively cumbersome. First, the tube must be clamped between the jaws. Care must be taken to ensure a correct distance of the pipe end from the flaring iron, so that it can be widened to the correct extent.
  • the crimping attachment should allow an exact and reproducible expansion of a cylindrical pipe end. This pipe ends of pipes of different materials, such as copper, brass, steel, Plastic (eg PEX), with or without plastic coating, easy to expand.
  • the crimping attachment should be operable with electric, pneumatic or hydraulic drives. Another way to operate the crimping attachment can also be done with a pair of pliers, preferably with a hydraulic pliers. A time-consuming changeover for different pipe diameters should be avoided.
  • the present invention designed flare is designed for operation with an electrically, pneumatically or hydraulically operated hand-held device.
  • the crimping attachment for expanding cylindrical tube ends has a connection interface for the hand-held device, clamping devices for a cylindrical tube and an opening device.
  • the expansion device can be delivered axially onto a pipe end fixed by the clamping device in order to widen it to the desired extent.
  • the clamping device and the expansion device are coupled to one another via a limited axially displaceable coupling member and activated sequentially.
  • the clamping of the tube and the expansion process via a single limited axial displacement of the coupling element via a single limited axial displacement of the coupling element.
  • the clamping process and the expansion process are triggered sequentially by the axial displacement of the coupling element.
  • the axial displacement of the coupling element is effected by means of the electrically, pneumatically or hydraulically operable drive unit, preferably with a handset, with which the crimping tower is connected via its Anbinde4.000stelle.
  • the pipe end is thus widened by machine. This eliminates physical effort, as required for example in the operation of known crimping pliers.
  • a concrete implementation of the general inventive idea underlying the proposed crimping attachment is the
  • the clamping device disposed within a cylindrical housing.
  • the clamping device has a number of ring-shaped arranged clamping jaws with clamping areas, which are automatically radially deliverable upon insertion of a cylindrical tube on a jacket of the tube to set this.
  • the expansion device is formed as a substantially conical Aufweitdorn mounted on a substantially coaxial with the annular arrangement of the jaws extending push rod and deliverable axially to a pipe end of the fixed pipe.
  • the push rod is arranged to be axially displaceable in an axial bore of the coupling element designed as a control sleeve. On its outer surface, the control sleeve on control tracks for a radial tilting of the jaws.
  • the control sleeve is so limited axially displaceable against the restoring force of a return spring, that the inserted tube is fixable on the radially deliverable jaws before the expanding mandrel is axially deliverable to the tube end.
  • the control sleeve, the pushrod guided in the bore of the control sleeve with the Aufweitdom and the annularly arranged jaws have within the cylindrical housing a space-saving, substantially coaxial arrangement.
  • This arrangement makes it possible to convert the limited axial displaceability of the control sleeve over the control tracks on the outer surface of the control sleeve in a radial movement of the jaws on each other.
  • the arrangement of the control sleeve ensures that the push rod with the expanding mandrel is only then delivered to the pipe end, after the pipe has been fixed sufficiently firmly by the jaws.
  • the activation of the Bördel essay is essentially limited to the limited axial displacement of the control sleeve, which is done by the electrically, pneumatically or hydraulically operable handset.
  • the fixing of the tube and the expansion of the pipe end are carried out automatically.
  • the return spring ensures that the control sleeve is moved back to its original position at the end of the crimping process. This will also the
  • An embodiment variant of the inventive crimping attachment can provide that the clamping jaws are tiltably mounted within the cylindrical housing. In this case, their end sections facing away from the clamping regions interact with the control tracks on the outer surface of the control sleeve.
  • This simple structural design allows the transfer of clamping forces to the desired extent on the tube end inserted into the attachment. These are essentially only dependent on the course and on the steepness of the control tracks on the outer surface of the control sleeve.
  • the end portions of the jaws are loaded by pressure pins whose free ends preferably form receptacles for rolling elements engaged with the control tracks on the outer surface of the control sleeve, the jaws can very reliably control the course of control consequences. A function of the detrimental friction of the interacting components can be largely avoided.
  • variants can be dispensed with the control tracks and rolling elements, wherein the force is transmitted via the pressure pin directly on the outer surface of the control sleeve on the jaws.
  • the clamping force with which the clamping jaws define the inserted tube end can be selectively controlled via the course of the control tracks on the outer surface of the control sleeve.
  • a variant of the beading attachment can therefore provide that the control tracks on the outer surface of the control sleeve are at least partially formed such that with increasing axial displacement of the control sleeve against the restoring force of the return spring, the clamping force of the jaws can be amplified. This is achieved, for example, by a change in the pitch of the control track, which results from a section-wise enlargement of the outside diameter of the control sleeve.
  • the control tracks on the outer surface of the sleeve may have one or more regions which are designed in such a way that after reaching a predetermined clamping force at a further axial Moving the control sleeve, the clamping force is constant durable.
  • a Such embodiment of the invention may be of interest, for example in Bördelauf arrangementsn, which should be used primarily for the expansion of the pipe ends of plastic pipes. In this case, it can also be provided that the expansion cone remains in engagement with the tube end over a relatively long period of time so that an elastic regression of the expansion can be counteracted.
  • the axial displacement of the control sleeve can also actuate a trigger which activates a hydraulic actuating mechanism for the clamping jaws.
  • hydraulically radially displaceable push rod can cooperate with the end portions of the jaws to tilt the jaws in their clamping position.
  • Another embodiment of the invention may also provide that the jaws are manually slightly radially apart, for example, to facilitate the insertion of a tube in the crimping or the removal of a tube with flared pipe end.
  • the cylindrical housing relative to the clamping jaws and against the return can be displaced in the direction of the Anbinde- interface limited force of a tension spring.
  • a protruding from an inner surface of the cylindrical housing and at least area wise circumferential projection which normally presses on the jaws is thereby displaced and releases the jaws.
  • a cooperating with the clamping jaws Zwangsluh- tion is arranged, via which the clamping jaws are pressed radially outward during axial displacement of the housing.
  • the restoring force of the tension spring for the housing is greater than the restoring force of the return spring for the control sleeve.
  • a further embodiment of the invention can provide that the clamping jaws are arranged such that their longitudinal axes with each other enclose an angle which is greater than 0 °.
  • the jaws are inclined relative to the longitudinal axis of the Bördelaufsatzes by an angle of about 1 0 to 15 ° in the opening direction, so that the jaws are always slightly V-shaped to each other. As a result, the insertion of a pipe end is facilitated in the crimping attachment.
  • control sleeve can also be accompanied by a rotary component.
  • control sleeve is rotatably mounted and control tracks are formed on their outer surface as curved tracks.
  • a simple embodiment of the invention may provide that the return spring and the tension spring are helical compression springs.
  • Helical compression springs are available in all desired strengths and have been tried and tested. It will be understood, however, that with minor structural modifications, which are within the skill of those of ordinary skill in the art, other types of springs or spring elements may be employed in place of helical compression springs, such as e.g. Tension springs, cone springs, leaf springs etc.
  • An embodiment variant of the invention can provide that the clamping device of the crimping element comprises at least three clamping jaws and a corresponding number of control tracks are formed on the outer surface of the control sleeve. With at least three jaws a pipe is already reliably fixed.
  • the clamping device comprises six clamping jaws and a corresponding number of control surfaces are formed on the outer surface of the control sleeve.
  • control sleeve To ensure the limited axial displacement of the control sleeve may be provided within the cylindrical housing an end stop.
  • the control sleeve in turn, may have a stop for the push rod connected to the Aufweitdom.
  • the flare attachments are each designed in accordance with one of the presented variations. If the user wants to machine pipes with different outside diameters, it is sufficient if he exchanges the flare attachment on the handset.
  • the connection interfaces can be, for example, screw threads, fork connections or bayonets, which interact with corresponding interfaces on the hand-held device.
  • the change of the Bördelaufsatzes can therefore be very simple, fast and usually done without tools. In contrast to known from the prior art flaring a separate flaring device is therefore not required for each pipe diameter.
  • the hand-held device can also be a universal hand-held device, which apart from the beading attachment also with other attachments for further processing steps, such as. Cutting, pressing, joining by sliding sleeve technology, etc. can be equipped. As a result, the use of the handheld device can be optimized.
  • An exemplary set of crimping heads according to the invention consists of crimping tips for pipe diameters of 4 mm to 63 mm. This means that the majority of the pipe diameters customary in installation technology can be machined.
  • the individual flare tips for different pipe diameters can be distinguished from one another by optical characteristics.
  • a set of crimping sets can provide different color identifiers for the individual crimping sets for different pipe diameters, which are preferably attached to the insertion side for a pipe on the cylindrical housing. But it can also have the entire housing of the individual flare caps, depending on their diameter from each other different colors.
  • the individual crimping attachments of a set may also have embossed in the housing markings that indicate, for example, immediately the outer diameter of a suitable pipe, etc.
  • Fig. 1 is an exploded perspective view of a crimping attachment
  • FIG. 2 is an axial sectional view of a crimping attachment in the initial situation
  • FIG. 3 shows an axial section of the crimping attachment according to FIG. 2 with a tube inserted and already expanded tube end
  • FIG. 2 is an axial sectional view of a crimping attachment in the initial situation
  • FIG. 3 shows an axial section of the crimping attachment according to FIG. 2 with a tube inserted and already expanded tube end
  • FIG. 3 shows an axial section of the crimping attachment according to FIG. 2 with a tube inserted and already expanded tube end
  • FIGS. 4 and 5 are perspective views of two embodiments of a crimping attachment connected to a hand-held device
  • Fig. 6 is a side view of another A game playing game played on a hand tool Bördclaufsatzes.
  • Fig. 7 is a perspective view of a set of Bördelauf algorithmsn for different pipe diameters.
  • connection interface 30 is designed as a bayonet for a corresponding bayonet catch on the hand tool.
  • the connection interface for example, as a
  • the guide member 3 has a central axial bore 4, which receives a widening device comprising an expansion cone 5, which is connected via a B e festi supply screw 61 with a push rod 6.
  • a plurality of clamping jaws 7 of a clamping device for a pipe to be flared are arranged in the form of a ring around the guide part 3 and are tiltably supported on abutment surfaces 31 of the guide part 3.
  • the movement of the jaws 7 of the clamping device and the push rod 6 with the expansion cone 5 of the expansion device fastened thereto are coupled to one another via a coupling element, which is designed as a control sleeve 8.
  • the control sleeve 8 is limited axially displaceable against the restoring force of a return spring 9 in the central bore 4 of the guide member 3.
  • the return spring for example a screw pressure spring, is supported in an annular extension (not visible) of the central axial bore 4 of the guide part 3 and on a peripheral flange 81 on the end of the control sleeve 8 facing away from the guide part 3.
  • the control sleeve 8 has an axial through hole 82 which receives the push rod 6.
  • a screw 62 prevents the push rod 6 from sliding out of the central through-hole 82 of the control sleeve 8.
  • the control sleeve 82 control tracks 83, via which the tilting of the jaws 7 is controllable.
  • end portions 71 of the jaws 7 act via pressure pin 73 and rolling elements 74, which project through substantially radially extending bores 32 in the guide member 3 in the central bore 4, with the control tracks 83 on the outer surface of the control sleeve 8 together.
  • the end portions 71 of the jaws 7 opposite ends form clamping portions 72 for a pipe to be fixed.
  • a rocker pad 1 1, whose function will be explained in more detail below, cooperates with jaws 7.
  • the cylindrical housing 2 of the crimping attachment is grouped relative to the guide part 3 and the expanding device received therefrom or annularly around it
  • Clamping jaws 7 of the clamping device mounted axially displaceable.
  • a stop 21 is provided within the housing 2, on which a tension spring 10, for example a helical compression spring, is supported.
  • the beginner i egen de end of the tension spring 10 is supported on a radial extension 33 of the guide member 3 from.
  • FIG. 2 shows an axial section of the assembled crimping attachment 1.
  • the same reference numerals designate the same components as in Fig. 1.
  • the return spring 9 holds the control sleeve 8 and thus also the push rod 8 with the attached Aufkonkonus 5 in its retracted position.
  • the flange 81 and a part of the restoring spring 9 can protrude from the connection interface 30.
  • the end of the control sleeve 8 provided with the flange 81 projects beyond the end
  • the jaws 7 are in each case via the pressure pin 73 and the rolling elements 74, which project through the associated radial bore 32 in the guide part 3, in contact with the associated control track 83 on the outer surface of the Steuerhülsc 8. In particular, they are each at one Inlet of the control track 83, which preferably has only a slight slope.
  • Fig. 2 also shows the tension spring 10, which extends between the stop 21 on the inner surface of the cylindrical housing 2 and the radial extension 33 of the guide part 3. Also protruding from the inner wall projection 22, which loads the jaws 7, can be seen in the illustration.
  • the jaws 7 are preferably held in the housing 2 such that they enclose an angle of about 1 ° to 15 ° with the longitudinal axis of the Bördclaufsatzes 1. As a result, they are inclined to each other in the opening direction in a V-shape. This facilitates the insertion of a pipe end in the crimping tower.
  • 1 Fig. 3 shows the hemming 1 in an analogous to FIG. 2 axially cut representation at the end of the expansion process of a pipe end R.
  • the same components are in turn provided with the same reference numerals as in Fig. 1 and 2.
  • the control sleeve 8 and the push rod 6 with the widening cone 5 fastened to it are in their final positions. This is predetermined, for example, that the flange 81 is moved to the control sleeve 8 against a stop. Alternatively, the return spring 9 could be compressed to "block".
  • the Aufweitkonus 5 is pushed onto the pipe end R to and in the same. In this case, the expansion of the pipe end R takes place to the desired extent. It may also be provided a stop for the Aufweitkonus 5, depending on the pipe diameter to limit the expansion process.
  • the course of the control tracks 83 may be formed such that the clamping force remains constant after reaching a maximum clamping force.
  • the clamping force can increase to the end of the axial displacement operation of the control sleeve 8.
  • the degree of increase in the clamping force depends only on the slope of the control tracks 83 at a constant feed rate. If the feed force to the control sleeve 8 and the push rod 6 ends, for example by the plunger of the drive of the hand tool is withdrawn, forces the return spring 9, the control sleeve 8 and the push rod 6 back into their starting position shown in FIG.
  • control sleeve 8 may also be superimposed by a rotational movement during its axial advance.
  • the expander cone 5 can be rotated in addition to its axial feed.
  • Fig. 4 shows a mounted on a handset G Bördelaufsatz 1.
  • the handset is, for example, a Akku-betricbcnes multi-functional device that can be used by different essays for other tasks, such as cutting, pressing, connecting by sliding sleeve technology, etc.
  • the crimping attachment 1 is connected via an angle adapter W with the handset G, so that it extends in the position of use, for example, substantially horizontally.
  • the longitudinal axis A of the Bördelaufsatzes 1 with a longitudinal axis L of the handset G an angle ⁇ of 90 ° to 120 °, preferably from 100 ° to 108 ° one.
  • the crimping attachment 1 can also be connected in a vertical position to a hand-held device G, as shown by the example of FIG. 6.
  • FIG. 7 shows, for example, a set of five flanging attachments 1 a, 1 b, 1 c, 1 d, 1 e, which is designed for processing pipe diameters of 16 mm to 40 mm.
  • the five boarder Traces la, lb, lc, ld, 1 e have recording diameters of 16 mm, 20 mm, 26 mm, 32 mm and 40 mm.
  • the individual flanging attachments 1 a, 1 b, 1 c, 1 d, 1 le of a set can have optical markings.
  • the flanges can also be marked in different colors according to la, lb, lc, ld, le of a set.
  • the entire outside of the housing may be colored or, as shown, an annular color coding may be attached to the housing.
  • the different annular color coding is indicated in Fig. 7 by different hatching of the end ring 13 at the insertion end of the respective Bördeetzsatzes la, lb, lc, ld, le.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)

Abstract

L'invention concerne un outil de bordage qui est conçu pour fonctionner avec un appareil à main à commande électrique, pneumatique ou hydraulique. L'outil de bordage (1) destiné à élargir des extrémités (R) de tubes cylindriques présente une interface de fixation (30) pour l'appareil à main, des dispositifs de serrage (7) pour une extrémité (R) de tube cylindrique et un dispositif d'élargissement (5, 6). Le dispositif d'élargissement (5, 6) peut être réglé axialement sur l'extrémité (R) de tube d'une extrémité (R) de tube fixée par le dispositif de serrage (7) pour élargir celle-ci dans la mesure souhaitée. Selon l'invention, le dispositif de serrage (7) et le dispositif d'élargissement (5, 6) sont accouplés l'un avec l'autre par un élément d'accouplement (8) axialement déplaçable de manière limitée et sont séquentiellement activables. L'invention concerne également un jeu d'outils de bordage pour l'élargissement d'extrémités de tubes de diamètres différents.
EP14704158.6A 2013-02-13 2014-02-13 Outil de bordage pour élargir des extrémités de tubes cylindriques Active EP2956254B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00452/13A CH707604A1 (de) 2013-02-13 2013-02-13 Bördelaufsatz zum Aufweiten von zylindrischen Rohrenden.
PCT/EP2014/052822 WO2014125025A1 (fr) 2013-02-13 2014-02-13 Outil de bordage pour élargir des extrémités de tubes cylindriques

Publications (2)

Publication Number Publication Date
EP2956254A1 true EP2956254A1 (fr) 2015-12-23
EP2956254B1 EP2956254B1 (fr) 2018-09-05

Family

ID=50097696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14704158.6A Active EP2956254B1 (fr) 2013-02-13 2014-02-13 Outil de bordage pour élargir des extrémités de tubes cylindriques

Country Status (5)

Country Link
EP (1) EP2956254B1 (fr)
CH (1) CH707604A1 (fr)
DK (1) DK2956254T3 (fr)
ES (1) ES2701195T3 (fr)
WO (1) WO2014125025A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105618602A (zh) * 2014-12-01 2016-06-01 中航贵州飞机有限责任公司 一种不锈钢厚壁管管件扩口装置
US9975289B2 (en) 2016-07-27 2018-05-22 Black & Decker Inc. PEX expanding tool
CN114393815B (zh) * 2022-02-18 2023-12-01 太原畅达华美新材料科技有限公司 一种pvc管道生产用接口扩张装置
CN115255957A (zh) * 2022-08-08 2022-11-01 苏州华源控股股份有限公司 锥形圆罐的生产线

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1276048A (fr) * 1960-10-03 1961-11-17 Mine Safety Appliances Co Outil pour épanouir les tubes
DE3643727C2 (de) * 1986-11-03 1996-09-05 Foell Remswerk Rohraufweitvorrichtung
NL9102050A (nl) * 1991-12-09 1993-07-01 Tapkoel Horeca Installatie En Handwerktuig voor het verwijden van een pijpeinde en pijpkoppeling gebruikmakend van een dergelijk verwijd pijpeinde.
US20060117827A1 (en) * 2004-12-07 2006-06-08 Kao Meng J Tube expander
TWM386419U (en) * 2010-02-11 2010-08-11 Lai Si Yu Automatic extruding device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014125025A1 *

Also Published As

Publication number Publication date
ES2701195T3 (es) 2019-02-21
EP2956254B1 (fr) 2018-09-05
WO2014125025A1 (fr) 2014-08-21
DK2956254T3 (da) 2019-01-07
CH707604A1 (de) 2014-08-15

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