EP0397570B1 - Tube end enlarging or expanding tool - Google Patents
Tube end enlarging or expanding tool Download PDFInfo
- Publication number
- EP0397570B1 EP0397570B1 EP19900401241 EP90401241A EP0397570B1 EP 0397570 B1 EP0397570 B1 EP 0397570B1 EP 19900401241 EP19900401241 EP 19900401241 EP 90401241 A EP90401241 A EP 90401241A EP 0397570 B1 EP0397570 B1 EP 0397570B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mandrel
- link
- appliance
- movable handle
- 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.)
- Expired - Lifetime
Links
- 238000013459 approach Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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 the expandable jaws grouped in a clearance which, with the threaded ring holding them against the body of the device, constitutes an interchangeable expansion tool.
- Patent US-A-2,999,529 of September 12, 1961 and FR-A-1,581,127 of July 25, 1968 relate to apparatus 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 on the face opposite to its conical end the force resulting from the action of the operator.
- 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.
- the document EP-A-0252.868 describes an apparatus according to the preamble of claim 1 intended to widen or flare the ends of tubes or the like by spacing the jaws of an expansion tool mounted on a body integral with a fixed handle, said apparatus comprising a mandrel which slides along its axis in the body, and the conical end of which is designed to engage between the jaws under the action of a movable handle articulated on the one hand directly on the body and on the other hand to the mandrel via a link, the latter being articulated on one side at movable handle and on the side opposite the mandrel.
- This arrangement makes it possible to apply a significant extraction force to the mandrel by spreading the sleeves of the device. However, it results in exerting forces on the mandrel which are not constantly directed along its axis.
- the present invention aims to provide an apparatus of the same kind, but in which it is possible for the operator to exert on the mandrel only forces parallel to its axis.
- the invention provides an apparatus intended to widen or flare the ends of tubes or the like by spacing the jaws of an expansion tool mounted on a body integral with a fixed handle, said apparatus comprising a mandrel which slides along its axis in the body, and the conical end of which is designed to engage between the jaws under the action of a movable handle, connected by a hinge device comprising a link, on the one hand to the body and on the other hand to the mandrel, this apparatus having the particularity that the movable handle is articulated directly on the mandrel by an axis, and connected to the body by means of the link, which is articulated to the movable handle by an axis and to the body by another axis offset from the axis of the mandrel.
- the apparatus intended to widen the ends of the tubes or the like shown in FIG. 1, comprises a body 1, an expansion tool with jaws 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 flanks 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 marking shoulder 9 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 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 about an axis 13 secured to the body of the device provides the movable handle with a point d pressing 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, or 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 connecting annealed copper tubes that are encountered in sanitary installations.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manipulator (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Surgical Instruments (AREA)
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 à 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 the 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 US-A-2.999.529 du 12 septembre 1961 et le FR-A-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.Patent US-A-2,999,529 of September 12, 1961 and FR-A-1,581,127 of July 25, 1968 relate to apparatus 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 on the face opposite to its conical end the force resulting from the action of the operator. Thus, in the absence of means for pulling said mandrel, its return only results from the jaws being brought together 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.
Quels que soient 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 tools are used with these devices, the operator still 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.
Le document EP-A-0252.868 décrit un appareil selon le préambule de la revendication 1 destiné à élargir ou évaser les extrémités de tubes ou similaires par écartement des mâchoires d'un outil d'expansion monté sur un corps solidaire d'un manche fixe, ledit appareil comprenant un mandrin qui coulisse selon son axe dans le corps, et dont l'extrémité conique est prévue pour s'engager entre les mâchoires sous l'action d'un manche mobile articulé d'une part directement sur le corps et d'autre part au mandrin par l'intermédiaire d'une biellette, celle-ci étant articulée d'un côté au manche mobile et du côté opposé au mandrin. Cette disposition permet d'appliquer au mandrin une force d'extraction importante en écartant les manches de l'appareil. Toutefois, elle aboutit à exercer sur le mandrin des efforts qui ne sont pas constamment dirigés selon son axe.The document EP-A-0252.868 describes an apparatus according to the preamble of
La présente invention a pour but de fournir un appareil du même genre, mais dans lequel il soit possible à l'opérateur de n'exercer sur le mandrin que des efforts parallèles à son axe.The present invention aims to provide an apparatus of the same kind, but in which it is possible for the operator to exert on the mandrel only forces parallel to its axis.
Pour obtenir ce résultat, l'invention fournit un appareil destiné à élargir ou évaser les extrémités de tubes ou similaires par écartement des mâchoires d'un outil d'expansion monté sur un corps solidaire d'un manche fixe, ledit appareil comprenant un mandrin qui coulisse selon son axe dans le corps, et dont l'extrémité conique est prévue pour s'engager entre les mâchoires sous l'action d'un manche mobile, relié par un dispositif à articulations comprenant une biellette, d'une part au corps et d'autre part au mandrin, cet appareil ayant pour particularité que le manche mobile est articulé directement sur le mandrin par un axe, et relié au corps par l'intermédiaire de la biellette, qui est articulée au manche mobile par un axe et au corps par un autre axe décalé par rapport à l'axe du mandrin.To obtain this result, the invention provides an apparatus intended to widen or flare the ends of tubes or the like by spacing the jaws of an expansion tool mounted on a body integral with a fixed handle, said apparatus comprising a mandrel which slides along its axis in the body, and the conical end of which is designed to engage between the jaws under the action of a movable handle, connected by a hinge device comprising a link, on the one hand to the body and on the other hand to the mandrel, this apparatus having the particularity that the movable handle is articulated directly on the mandrel by an axis, and connected to the body by means of the link, which is articulated to the movable handle by an axis and to the body by another axis offset from the axis of the mandrel.
D'autres modalités avantageuses de l'invention sont exposées dans les revendications subordonnées.Other advantageous embodiments of the invention are set out in the dependent claims.
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 tool-less device 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
Pour que l'engagement de l'extrémité conique du mandrin entre les mâchoires de l'outil ne requière 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 sleeves, the
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 on FIG. 1, it can be seen that the
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 inside 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 connecting annealed copper tubes that are encountered in sanitary installations.
Claims (10)
- Appliance for expanding the ends of pipes, or similar articles by forcing apart the jaws (12) of an expansion tool mounted on a body (1) integral with a stationary handle (7), said appliance comprising a mandrel (2) which is able to slide along its own axis in the body (1), and the tapered end (8) of which is provided for engaging between the jaws (12) under the action of a movable handle (4) articulated by link means comprising a link (3) to the body on one side, and to the mandrel (2) on the other side,
characterized in that the movable handle is articulated directly to the mandrel (2) by means of an axle pin (15), and hinged to the body through the link (3) which is articulated to the movable handle (4) by means of an axle pin (14) and to the body (1) by means of another axle pin (13) which is offset relative to the axis of the mandrel (2). - Appliance as claimed in claim 1, wherein the link (3) has a recess (16) giving it an arched shape such that it leaves sufficient space free to ensure that the shank (6) of the mandrel is not struck by the said link (3) when the movable handle (4) is brought up against the stationary handle (7).
- Appliance as claimed in claim 1 or 2, wherein the return of the mandrel (2) is limited by a shoulder (9) which comes up against the bottom of a chamber (10) extending the bore of the body (1) of the appliance.
- Appliance as claimed in anyone of claims 1 to 3, wherein the link (3) pivoting about an axle pin (13) fixed to the body (1) of the appliance maintains the movable handle (4) in the plane of the stationary handle (4).
- Appliance as claimed in claim 4, wherein the movable handle (4) has a front groove (5) which cooperates with the sides of the link (3) maintaining the said movable handle (4) in the plane of the the stationary handle (7).
- Appliance as claimed in claim 5, wherein the mandrel (2) has a shank (6) with its sides flattened, which matches the width of the groove (5) for maintaining more efficiently the movable handle (4) in the plane of the stationary handle (7).
- Appliance as claimed in anyone of claims 1 to 6, wherein the distance between the centre of the pivot axle pin (13) pivotally connecting the link (3) with the body and the longitudinal axis (A) of the mandrel is equal to that separating the axes of the two pivot axle pins (14) and (15) of the movable handle.
- Appliance as claimed in anyone of claims 1 to 7, wherein the distance separating the axes of the two axle pins (13) and (14) of the link is equal to 255 times that separating the axes (14, 15) of the two axle pins of the movable handle.
- Appliance as claimed in anyone of claims 1 to 8, wherein there is a disjunction of the joints which is such that in proportion as the movable handle (4) approaches the stationary handle (7), the length (T) of the lever arm existing in the region of the movable handle (4) between the centre of articulation (14) of the link on the movable handle (4) and the extension of the axis (A) of the mandrel (2) decreases progressively until the haft (17) of the movable handle touches that (18) of the stationary handle.
- Appliance as claimed on claim 9, wherein, when the stationary and movable hafts (17, 18) are in abutment, the length (T) of the lever arm existing between the center of articulation (14) of the link on the movable handle (4) and the extension of the axis (4) of the mandrel is equal to 1/3 of the distance (X) separating the axle (13) of articulation of the link (3) on the body (1) and the axis (A) of the mandrel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8906448 | 1989-05-12 | ||
| FR8906448A FR2646792A1 (en) | 1989-05-12 | 1989-05-12 | APPARATUS FOR EXTENDING OR EVASING THE END OF TUBES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0397570A1 EP0397570A1 (en) | 1990-11-14 |
| EP0397570B1 true 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) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2809651B1 (en) * | 2000-05-30 | 2002-09-13 | Alphacan Sa | SOCKET PLIERS |
| EP1369188B1 (en) | 2002-06-06 | 2003-12-17 | Rothenberger Aktiengesellschaft | Plier like hand tool for enlarging hollow bodies |
| AU2011201540B2 (en) | 2010-04-06 | 2013-10-31 | Milwaukee Electric Tool Corporation | Pex expanding tool |
| US9914260B2 (en) | 2014-06-20 | 2018-03-13 | Milwaukee Electric Tool Corporation | PEX expanding tool |
| US9862137B2 (en) | 2015-04-20 | 2018-01-09 | Milwaukee Electric Tool Corporation | PEX expanding tool |
| WO2016201196A1 (en) | 2015-06-10 | 2016-12-15 | Milwaukee Electric Tool Corporation | Pex expanding tool |
| 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 |
| EP3698941A3 (en) | 2019-02-20 | 2020-10-21 | Milwaukee Electric Tool Corporation | Pex expansion tool |
| EP3698942A3 (en) | 2019-02-20 | 2020-10-28 | Milwaukee Electric Tool Corporation | Pex expansion tool |
| CN214726466U (en) | 2020-11-27 | 2021-11-16 | 米沃奇电动工具公司 | Expansion tool |
| CN112828172A (en) * | 2021-01-19 | 2021-05-25 | 大连长丰实业总公司 | Hydraulic pipe expanding machine |
| US11779990B2 (en) | 2021-04-09 | 2023-10-10 | Milwaukee Electric Tool Corporation | Expansion tool |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981000364A1 (en) * | 1979-07-30 | 1981-02-19 | Rast Patent Mfg Ltd | Tube expanding tool |
| US4735078A (en) * | 1986-07-07 | 1988-04-05 | Emerson Electric Co. | Tube expanding tool |
| DE3732628C1 (en) * | 1987-09-28 | 1989-04-27 | Rothenberger Werkzeuge Masch | Expanding tool for hollow workpieces |
-
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
Also Published As
| Publication number | Publication date |
|---|---|
| DE69010980D1 (en) | 1994-09-01 |
| EP0397570A1 (en) | 1990-11-14 |
| DE69010980T2 (en) | 1995-02-23 |
| FR2646792A1 (en) | 1990-11-16 |
| FR2646792B1 (en) | 1995-02-24 |
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