EP0397570A1 - Tube end enlarging or expanding tool - Google Patents
Tube end enlarging or expanding tool Download PDFInfo
- Publication number
- EP0397570A1 EP0397570A1 EP90401241A EP90401241A EP0397570A1 EP 0397570 A1 EP0397570 A1 EP 0397570A1 EP 90401241 A EP90401241 A EP 90401241A EP 90401241 A EP90401241 A EP 90401241A EP 0397570 A1 EP0397570 A1 EP 0397570A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mandrel
- handle
- axis
- movable
- movable handle
- 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
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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
- B21D41/026—Enlarging by means of mandrels
Definitions
- the present invention relates to an apparatus for widening or flaring the ends of tubes or the like comprising a movable handle and a fixed handle integral with a body through which a mandrel passes, which under the action of an external force applied to the sleeves moves axially and forces radially apart from each other expandable jaws grouped in a clearance which with the threaded ring holding them against the body of the device constitutes an interchangeable expansion tool.
- One of the aims of the present invention is to remedy these difficulties in returning the mandrel by connecting it to the movable handle by an articulation comprising a link.
- the proposed solution allows to apply if necessary to the mandrel an extraction force which is only limited by the force developed by the operator on the two handles of the device.
- the apparatus intended to widen the ends of the tubes or the like shown in FIG. 1, comprises a body 1, a jaw expansion tool 12, a mandrel 2, a rod 3 and two sleeves, one of which is movable 4 is articulated directly on the mandrel while being retained close to the body by the link which consists of one or more sheet thicknesses.
- the body and the fixed handle 7 which carries it have a plane of symmetry which must coincide with that of the movable handle and its front groove 5.
- the support provided by the sides of the link at the level of the groove acting as yoke is reinforced by the guide resulting from the insertion of the shank 6 of the mandrel in this same groove, because the flat shape obtained by double milling of said shank is adjusted to the width of the yoke.
- the diameter of the base circumference of the conical end 8 of the mandrel being greater than that of the cylindrical part sliding in the body 1, said conical part cannot enter the bore of said body beyond the shoulder 9 marking the bottom of the chamber 10.
- the mandrel is immobilized against this stop, its conical end is no longer in contact with the jaws of the tool which are therefore gathered together against each other under the action of the spring 11.
- the transition from this position to that shown in FIG. 1 is only an approach phase preceding the expansion phase of the jaws.
- the link 3 which pivots around an axis 13 secured to the body of the device provides the movable handle with a point of 'support on said body such that the multiplication ratio of the force supplied by the operator increases as this movable handle approaches the fixed handle.
- the link 3 whose articulation axes 13 and 14 are identical to that 15 of the tail of the mandrel on the movable handle, has a recess 16 which gives it a specific arched shape leaving free a sufficient space for the tail 6 of the mandrel not to strike said link when the movable handle approaches the fixed handle.
- the length T of the lever arm existing between the articulation center 14 of the link on the movable arm and the extension of the axis A of the mandrel 2 decreases progressively until it is equal to a third of the distance X, that is to say four millimeters when the handle 17 of the movable handle comes to touch that of the fixed handle 18.
- This device which can receive most of the tools currently available in specialized shops, allows for the sockets necessary for the connection of annealed copper tubes that are encountered in sanitary installations.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
- Surgical Instruments (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
La présente invention concerne un appareil pour élargir ou évaser les extrémités des tubes ou articles similaires comprenant un manche mobile et un manche fixe solidaire d'un corps traversé par un mandrin, lequel sous l'action d'une force extérieure appliquée sur les manches se déplace axialement et oblige s'écarter radialement les unes des autres des mâchoires expansibles regroupées en un jeu qui avec la bague filetée les retenant contre le corps de l'appareil constitue un outil d'expansion interchangeable.The present invention relates to an apparatus for widening or flaring the ends of tubes or the like comprising a movable handle and a fixed handle integral with a body through which a mandrel passes, which under the action of an external force applied to the sleeves moves axially and forces radially apart from each other expandable jaws grouped in a clearance which with the threaded ring holding them against the body of the device constitutes an interchangeable expansion tool.
Le brevet américain 2 999 529 du 12 septembre 1961 et le brevet français 1 581 127 du 25 juillet 1968 ont pour objet des appareils de ce type, mais dans ces derniers, c'est un excentrique ou une came solidaire du levier mobile qui pousse le mandrin dans l'axe du jeu de mâchoires en appliquant sur la face opposée à son extrémité conique l'effort résultant de l'action de l'opérateur. Ainsi en absence de moyen de traction dudit mandrin, son retour ne résulte que du rapprochement des mâchoires sous l'action d'un moyen de rappel en position de repos, qui est soit un ressort, soit un jonc élastique monté serrant sur la circonférence extérieure du jeu de mâchoires.The American patent 2 999 529 of September 12, 1961 and the French patent 1 581 127 of July 25, 1968 relate to devices of this type, but in the latter, it is an eccentric or a cam integral with the movable lever which pushes the mandrel in the axis of the set of jaws by applying the force resulting from the operator's action to the face opposite its conical end. Thus, in the absence of means for pulling said mandrel, its return only results from the approximation of the jaws under the action of a return means in the rest position, which is either a spring or an elastic ring mounted tightening on the outer circumference of the jaw set.
Quelque soit les outils utilisés avec ces appareils, l'opérateur éprouve toujours des difficultés pour obtenir le recul du mandrin une fois que l'extrémité du tube a été élargie. Cela est dû à ce que l'effort développé par le ressort ou le jonc élastique est insuffisant pour vaincre les frottements inévitables qui existent et s'opposent à tout déplacement au niveau des zones de contact dudit mandrin avec les mâchoires et avec le corps.Whatever the tools used with these devices, the operator always has difficulty obtaining the recoil of the mandrel once the end of the tube has been widened. This is due to the fact that the force developed by the spring or the elastic ring is insufficient to overcome the inevitable friction which exists and which prevents any movement at the level of the contact zones of said mandrel with the jaws and with the body.
L'un des buts de la présente invention est de remédier à ces difficultés de retour du mandrin en le reliant au manche mobile par une articulation comprenant une biellette. La solution proposée permet d'appliquer si nécessaire au mandrin un effort d'extraction qui n'est limité que par la force développée par l'opérateur sur les deux manches de l'appareil.One of the aims of the present invention is to remedy these difficulties in returning the mandrel by connecting it to the movable handle by an articulation comprising a link. The proposed solution allows to apply if necessary to the mandrel an extraction force which is only limited by the force developed by the operator on the two handles of the device.
Dans ce qui suit, l'invention est exposée en détail à l'aide de dessins représentant seulement un mode d'exécution donné à titre d'exemple non limitatif :
- - La figure 1 est une vue en coupe longitudinale d'un appareil complet représenté dans la position qui lui permet de recevoir l'extrémité du tube à travailler.
- - La figure 2 est une vue latérale de l'appareil sans outil représenté bras fermés.
- - Figure 1 is a longitudinal sectional view of a complete apparatus shown in the position which allows it to receive the end of the tube to be worked.
- - Figure 2 is a side view of the toolless tool shown with arms closed.
L'appareil destiné à élargir les extrémités des tubes ou similaires représenté figure 1, comprend un corps 1, un outil d'expansion à mâchoires 12, un mandrin 2, une biellette 3 et deux manches dont l'un mobile 4 est articulé directement sur le mandrin tout en étant retenu près du corps par la biellette qui est constituée d'une ou de plusieurs épaisseurs de tôle. Le corps et le manche fixe 7 qui le porte possèdent un plan de symétrie qui doit coïncider avec celui du manche mobile et de sa gorge frontale 5. Pour cela, le maintien assuré par les flancs de la biellette au niveau de la gorge faisant office de chape est renforcé par le guidage résultant de l'insertion de la queue 6 du mandrin dans cette même gorge, car la forme méplate obtenue par double fraisage de ladite queue est ajustée à la largeur de la chape. Le diamètre de la circonférence de base de l'extrémité conique 8 du mandrin étant supérieur à celui de la partie cylindrique coulissant dans le corps 1, ladite partie conique ne peut rentrer dans l'alésage dudit corps au-delà de l'épaulement 9 marquant le fond de la chambre 10. De plus, lorsque le mandrin est immobilisé contre cette butée, son extrémité conique n'est plus en contact avec les mâchoires de l'outil qui de ce fait se trouvent rassemblées les unes contre les autres sous l'action du ressort 11. Le passage de cette position à celle représentée figure 1 n'est qu'une phase d'approche précédant la phase d'expansion des mâchoires.The apparatus intended to widen the ends of the tubes or the like shown in FIG. 1, comprises a body 1, a
Pour que l'engagement de l'extrémité conique du mandrin entre les mâchoires de l'outil ne requiert pas de la part de l'opérateur un effort démesuré sur les manches, la biellette 3 qui pivote autour d'un axe 13 solidaire du corps de l'appareil assure au manche mobile un point d'appui sur ledit corps tel que le rapport de multiplication de l'effort fourni par l'opérateur augmente au fur et à mesure que ce manche mobile se rapproche du manche fixe.So that the engagement of the conical end of the mandrel between the jaws of the tool does not require an excessive effort on the part of the operator on the handles, the link 3 which pivots around an
Toujours sur la figure 1, on voit que la biellette 3 dont les axes d'articulation 13 et 14 sont identiques à celui 15 de la queue du mandrin sur le manche mobile, présente un évidement 16 qui lui confère une forme cambrée spécifique laissant libre un espace suffisant pour que la queue 6 du mandrin ne vienne pas heurter ladite biellette lorsque le manche mobile se rapproche du manche fixe.Still in FIG. 1, it can be seen that the link 3 whose
En se reportant à la figure 2 qui représente une vue latérale du même appareil sans l'outil d'expansion, avec réduction d'échelle de 50% et rapprochement des manches, on constate que la distance X séparant le centre de l'axe d'articulation 13 de la biellette sur le corps et l'axe A du mandrin est égale à la distance Y séparant les centres des deux axes d'articulation 14, 15, du manche mobile. De même la distance Z séparant les centres des deux axes 13, 14 de la biellette est égale à deux fois et demie la distance Y séparant les centres des deux axes du manche mobile.Referring to Figure 2 which shows a side view of the same device without the expansion tool, with scale reduction of 50% and approximation of the sleeves, we see that the distance X separating the center of the axis d '
L'engagement du mandrin entre les mâchoires de l'outil vissé sur le corps de l'appareil étant obtenu par le rapprochement du manche mobile du manche fixe, lesdites mâchoires s'écartent de plus en plus les unes des autres au fur et à mesure que le manche mobile se rapproche du manche fixe. Pour obtenir une expansion au diamètre souhaité du tube coiffant les mâchoires, les forces radiales engendrées entre ces mâchoires doivent augmenter sans cesse. Ainsi pour limiter à une valeur acceptable l'accroissement de l'effort demandé à l'opérateur, la longueur T du bras de levier existant entre le centre d'articulation 14 de la biellette sur le bras mobile et le prolongement de l'axe A du mandrin 2 diminue progressivement jusqu'à être égale au tiers de la distance X, soit quatre millimètres lorsque la poignée 17 du manche mobile vient toucher celle 18 du fixe.The engagement of the mandrel between the jaws of the tool screwed onto the body of the device being obtained by bringing the movable handle closer to the fixed handle, said jaws move away from each other more and more as and when that the movable handle approaches the fixed handle. To obtain an expansion to the desired diameter of the tube covering the jaws, the radial forces generated between these jaws must constantly increase. Thus, to limit the increase in effort required from the operator to an acceptable value, the length T of the lever arm existing between the
A la fin de la phase d'expansion, lorsque les mâchoires ont été écartées au maximum permis par le diamètre intérieur de la bague 12a servant à fixer l'outil, l'articulation directe du mandrin sur le manche mobile permet à l'opérateur d'obtenir le retour complet du mandrin à sa position d'origine en évitant son coincement.At the end of the expansion phase, when the jaws have been moved apart to the maximum allowed by the internal diameter of the
Cet appareil qui peut recevoir la plupart des outils actuellement disponibles dans les commerces spécialisés permet de réaliser les emboîtures nécessaires au raccordement des tubes cuivre recuit que l'on rencontre dans les installations sanitaires.This device, which can receive most of the tools currently available in specialized shops, allows for the sockets necessary for the connection of annealed copper tubes that are encountered in sanitary installations.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8906448A FR2646792A1 (en) | 1989-05-12 | 1989-05-12 | APPARATUS FOR EXTENDING OR EVASING THE END OF TUBES |
FR8906448 | 1989-05-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0397570A1 true EP0397570A1 (en) | 1990-11-14 |
EP0397570B1 EP0397570B1 (en) | 1994-07-27 |
Family
ID=9381730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900401241 Expired - Lifetime EP0397570B1 (en) | 1989-05-12 | 1990-05-10 | Tube end enlarging or expanding tool |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0397570B1 (en) |
DE (1) | DE69010980T2 (en) |
FR (1) | FR2646792A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1160027A1 (en) * | 2000-05-30 | 2001-12-05 | Alphacan | Expansion plier |
US6672128B2 (en) | 2002-06-06 | 2004-01-06 | Rothenberger Werkeuge Aktiengesellschaft | Hand tool in pliers form for expanding hollow bodies |
US8517715B2 (en) | 2010-04-06 | 2013-08-27 | Milwaukee Electric Tool Corporation | PEX expanding tool |
CN106142527A (en) * | 2016-07-27 | 2016-11-23 | 广东联塑科技实业有限公司 | A kind of tube expander shown and limit expander amount |
US9862137B2 (en) | 2015-04-20 | 2018-01-09 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US9914260B2 (en) | 2014-06-20 | 2018-03-13 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US10000007B2 (en) | 2015-06-10 | 2018-06-19 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US11596999B2 (en) | 2019-02-20 | 2023-03-07 | Milwaukee Electric Tool Corporation | PEX expansion tool |
US11633775B2 (en) | 2019-02-20 | 2023-04-25 | Milwaukee Electric Tool Corporation | PEX expansion tool |
US11779990B2 (en) | 2021-04-09 | 2023-10-10 | Milwaukee Electric Tool Corporation | Expansion tool |
US11819902B2 (en) | 2020-11-27 | 2023-11-21 | Milwaukee Electric Tool Corporation | Expansion tool |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981000364A1 (en) * | 1979-07-30 | 1981-02-19 | Rast Patent Mfg Ltd | Tube expanding tool |
EP0252868A2 (en) * | 1986-07-07 | 1988-01-13 | Emerson Electric Co. | Tube expanding tool |
EP0309699A2 (en) * | 1987-09-28 | 1989-04-05 | Rothenberger Werkzeuge-Maschinen Gmbh | Enlarging device for hollow work pieces |
-
1989
- 1989-05-12 FR FR8906448A patent/FR2646792A1/en active Granted
-
1990
- 1990-05-10 DE DE1990610980 patent/DE69010980T2/en not_active Expired - Lifetime
- 1990-05-10 EP EP19900401241 patent/EP0397570B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981000364A1 (en) * | 1979-07-30 | 1981-02-19 | Rast Patent Mfg Ltd | Tube expanding tool |
EP0252868A2 (en) * | 1986-07-07 | 1988-01-13 | Emerson Electric Co. | Tube expanding tool |
EP0309699A2 (en) * | 1987-09-28 | 1989-04-05 | Rothenberger Werkzeuge-Maschinen Gmbh | Enlarging device for hollow work pieces |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2809651A1 (en) * | 2000-05-30 | 2001-12-07 | Alphacan Sa | SOCKET PLIERS |
EP1160027A1 (en) * | 2000-05-30 | 2001-12-05 | Alphacan | Expansion plier |
US6672128B2 (en) | 2002-06-06 | 2004-01-06 | Rothenberger Werkeuge Aktiengesellschaft | Hand tool in pliers form for expanding hollow bodies |
US8517715B2 (en) | 2010-04-06 | 2013-08-27 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US8763439B2 (en) | 2010-04-06 | 2014-07-01 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US9914260B2 (en) | 2014-06-20 | 2018-03-13 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US9993961B2 (en) | 2015-04-20 | 2018-06-12 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US9862137B2 (en) | 2015-04-20 | 2018-01-09 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US10926451B2 (en) | 2015-04-20 | 2021-02-23 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US11648727B2 (en) | 2015-04-20 | 2023-05-16 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US12023849B2 (en) | 2015-04-20 | 2024-07-02 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US10000007B2 (en) | 2015-06-10 | 2018-06-19 | Milwaukee Electric Tool Corporation | PEX expanding tool |
US10946576B2 (en) | 2015-06-10 | 2021-03-16 | Milwaukee Electric Tool Corporation | PEX expanding tool |
CN106142527A (en) * | 2016-07-27 | 2016-11-23 | 广东联塑科技实业有限公司 | A kind of tube expander shown and limit expander amount |
CN106142527B (en) * | 2016-07-27 | 2019-02-15 | 广东联塑科技实业有限公司 | A kind of tube expander shown and limit expander amount |
US11596999B2 (en) | 2019-02-20 | 2023-03-07 | Milwaukee Electric Tool Corporation | PEX expansion tool |
US11633775B2 (en) | 2019-02-20 | 2023-04-25 | Milwaukee Electric Tool Corporation | PEX expansion tool |
US11819902B2 (en) | 2020-11-27 | 2023-11-21 | Milwaukee Electric Tool Corporation | Expansion tool |
US11779990B2 (en) | 2021-04-09 | 2023-10-10 | Milwaukee Electric Tool Corporation | Expansion tool |
Also Published As
Publication number | Publication date |
---|---|
EP0397570B1 (en) | 1994-07-27 |
DE69010980T2 (en) | 1995-02-23 |
FR2646792B1 (en) | 1995-02-24 |
FR2646792A1 (en) | 1990-11-16 |
DE69010980D1 (en) | 1994-09-01 |
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