FR2574685A1 - Portable bending press having a hydraulic reversible-screw rotary jack for bending by winding - Google Patents
Portable bending press having a hydraulic reversible-screw rotary jack for bending by winding Download PDFInfo
- Publication number
- FR2574685A1 FR2574685A1 FR8419399A FR8419399A FR2574685A1 FR 2574685 A1 FR2574685 A1 FR 2574685A1 FR 8419399 A FR8419399 A FR 8419399A FR 8419399 A FR8419399 A FR 8419399A FR 2574685 A1 FR2574685 A1 FR 2574685A1
- Authority
- FR
- France
- Prior art keywords
- screw
- cylinder
- bending
- nut
- spring
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
- F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
- F15B15/068—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the helical type
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
Abstract
Description
La présente invention concerne une cintreuse hydraulique portable travaillant par enroulement sous l'action d un vérin hydraulique rotatif à vis réversible alimenté par une pompe à simple effet accouplée à un moteur d'entraînement. The present invention relates to a portable hydraulic bender working by winding under the action of a rotary hydraulic jack with reversible screw supplied by a single-acting pump coupled to a drive motor.
La motorisation des cintreuses manuelles destinées au travail des tubes de faible épaisseur en cuivre est traditionnellement réalisée par l'adjonction d'un motoréducteur à roue et à vis sans fin ou à engrenages parallèles. Ces systèmes entièrement mécanique restent lourds et encombrants. La cintreuse selon l'invention permet de remédier à cet inconvénient. The motorization of manual bending machines intended for working thin copper tubes is traditionally carried out by the addition of a geared motor with a worm and worm gear or with parallel gears. These fully mechanical systems remain heavy and bulky. The bender according to the invention overcomes this drawback.
La demande de brevet français n 76 26 004 a déjà pour objet une cintreuse portable automatique de structure compacte, obtenue par un judicieux agencement des engrenages. Mais la réduction d'encombrement qui en résulte n'est que partiellement satisfaisante. French patent application No. 76 26 004 already relates to an automatic portable bender of compact structure, obtained by a judicious arrangement of the gears. However, the resulting reduction in size is only partially satisfactory.
La présente invention a encore pour objet une cintreuse portable, mais dans celle-ci le réducteur mécanique a été remplacé par un vérin hydraulique rotatif à vis réversible très compact qui avec sa pompe d'alimentation accouplée a un moteur électrique constitue un système d'entrainement particulièrement bien adapté au cintrage par enroulement. The present invention also relates to a portable bender, but in this the mechanical reducer has been replaced by a very compact rotary hydraulic screw jack which with its feed pump coupled to an electric motor constitutes a drive system. particularly well suited for bending by winding.
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. In what follows the invention is explained in detail using drawings representing only one embodiment given by way of nonlimiting example.
- la figure 1 représente une vue de face d'une cintreuse hydraulique
selon l'invention.- Figure 1 shows a front view of a hydraulic bender
according to the invention.
- la figure 2 représente en coupe longitudinale le vérin hydraulique
rotatif à vis réversible.- Figure 2 shows in longitudinal section the hydraulic cylinder
reversible rotary screw.
- la figure 3 représente une vue de dessus du dispositif d'indexa
tion.- Figure 3 shows a top view of the indexing device
tion.
En se rapportant à la figure 1 on constate que la cintreuse selon l'invention comprend un bâti de cintrage (4) dont la tête (5) coiffe le carter cylindrique (2) sur lequel est monté la pompe d'alimentation (6) accouplée a un moteur électrique (16). La vis (19) traversant le bâti (4) permet de serrer le tube (20) sur la forme de cintrage. La stabilité de l'ensemble est assurée par un chassis tubulaire (28) intégrant deux arceaux (29) de préhension et une barre de fer plat (30) sur laquelle est vissé le corps de pompe (6). Referring to Figure 1 we see that the bender according to the invention comprises a bending frame (4) whose head (5) covers the cylindrical casing (2) on which is mounted the supply pump (6) coupled has an electric motor (16). The screw (19) passing through the frame (4) makes it possible to tighten the tube (20) on the bending form. The stability of the assembly is ensured by a tubular chassis (28) incorporating two gripping arches (29) and a flat iron bar (30) on which the pump body (6) is screwed.
Sur la figure 2 on voit que le vérin hydraulique rotatif est constitué d'un système vis-écrou réversible dont l'écrou (8) est solidaire du cylindre (1) entouré d'un carter (2) formant réservoir d'huile (3). In Figure 2 we see that the rotary hydraulic cylinder consists of a reversible screw-nut system whose nut (8) is integral with the cylinder (1) surrounded by a casing (2) forming an oil reservoir (3 ).
Ledit écrou (8) étant introduit avec son joint d'étanchéité (17) par un emmanchement à force dans l'alésage inférieur du cylindre (1), c'est la vis (9) qui s'anime d'un mouvement hélicoidal lors de l'admission de l'huile sous pression par le canal (31). Cette vis (9) à gros filet trapézoidal est rappelée dans le fond de l'écrou (8) par un ressort de traction (10) dont une extrémité est fixée à l'intérieur d#e la partie supérieure de ladite vis tandis que l'autre est solidaire dudit écrou (8) ou de tout autre élément fixe.Said nut (8) being introduced with its seal (17) by force fitting into the lower bore of the cylinder (1), it is the screw (9) which is animated by a helical movement during the admission of pressurized oil through the channel (31). This screw (9) with a large trapezoidal thread is recalled in the bottom of the nut (8) by a tension spring (10), one end of which is fixed inside the upper part of said screw while the 'other is integral with said nut (8) or any other fixed element.
Selon une variante de l'invention, ce ressort de traction (lnA qui est un moyen de rappel de la vis (9) peut être remplacé soit par un ressort de compression placé entre la vis (9) et la douille (13) ou l'entraineur (14), soit par une canalisation et un distributeur per
annuiaire mettant d'alimenter en huile la chambre/(12) située sous la douille (13) et d'exercer sur la partie supérieure de la vis (9) une pression suffisante pour que l'ensemble mobile revienne à sa position d'origine.According to a variant of the invention, this tension spring (lnA which is a means for returning the screw (9) can be replaced either by a compression spring placed between the screw (9) and the sleeve (13) or the 'coach (14), either by a pipe and a distributor per
annuiaire putting oil in the chamber / (12) located under the sleeve (13) and exerting on the upper part of the screw (9) sufficient pressure so that the movable assembly returns to its original position .
Toujours sur la figure 2, on constate que l'implantation du système vis-écrou dans le cylindre (1) entre l'arrivée d'huile venant de la pompe (6) et le joint d'étanchéité (15) permet la lubrification sous haute pression des filets dudit système dont la vis (9) possède une extrémité de section carrée (11) ou polygonale qui en coulissant dans la douille (13) assure la transformation du mouvement hélicoidal en mouvement circulaire pur. Ce mouvement de rotation est alors transmis à la forme de cintrage par l'intermédiaire de l'entraineur (14) vissé sur la douille (13) et qui traverse la tête de fixation (5) du bâti (4) montée à l'extrémité supérieure du cylindre (1). Still in FIG. 2, it can be seen that the installation of the screw-nut system in the cylinder (1) between the oil supply coming from the pump (6) and the seal (15) allows lubrication under high pressure threads of said system, the screw (9) has a square section end (11) or polygonal which by sliding in the sleeve (13) ensures the transformation of the helical movement into pure circular movement. This rotational movement is then transmitted to the bending form by means of the driver (14) screwed onto the sleeve (13) and which passes through the fixing head (5) of the frame (4) mounted at the end. upper of the cylinder (1).
L'embout (18) se trouvant à l'extremité inférieure du ressort de rappel (10) est remarquable en ce que tout en laissant passer l'huile entre la pompe (6) et le vérin, il assure l'immobilisation en rotation et en translation de l'extrémité inférieure dudit ressort (10) et permet après le montage de la vis (9) dans l'écrou (8) de donner à ce ressort (10) une torsion initiale plus ou moins grande pour assurer un retour très efficace de l'ensemble mobile å sa position d'origine. The end piece (18) located at the lower end of the return spring (10) is remarkable in that while letting the oil pass between the pump (6) and the jack, it ensures immobilization in rotation and in translation of the lower end of said spring (10) and allows after mounting the screw (9) in the nut (8) to give this spring (10) an initial twist more or less large to ensure a very return of the mobile assembly in its original position.
La cintreuse selon l'invention est une machine rapide pouvant exécuter des cintres d'un angle donné avec une grande précision grâce d'une part à un moyen de réglage de l'angle de cintrage et d'autre part grâce à un dispositif qui stoppe automatiquement l'opération de cintrage lorsque l'angle réglé au départ est obtenu. The bender according to the invention is a fast machine capable of executing hangers of a given angle with great precision thanks on the one hand to a means of adjusting the bending angle and on the other hand thanks to a device which stops automatically the bending operation when the angle set at the start is obtained.
En se reportant aux figures 2 et 3 on voit que ce moyen de réglage comprend un indicateur d'angle (23) fixé sur la tête (5) du bâti (4) et une bague d'indexation (24) munie d'un ergot (25). Un interrupteur (26) fin de course solidaire de l'indicateur d'angle coupe l'alimentation électrique du moteur d'entraînement lorsqu'il est actionné par l'ergot (25). Referring to Figures 2 and 3 we see that this adjustment means comprises an angle indicator (23) fixed on the head (5) of the frame (4) and an indexing ring (24) provided with a lug (25). A limit switch integral with the angle indicator interrupts the power supply to the drive motor when it is actuated by the lug (25).
La bague d'indexation avec son ergot est montée sur l'entraineur (14) par l'intermédiaire d'une pièce de friction annulaire du genre joint torique (27) qui permet à ladite bague de rester solidaire dudit entraineur (14) pendant l'opération de cintrage tandis qu'un couple exercé manuellement sur sa périphérie moletée permet de la faire tourner de façon à amener son ergot (25) en face de n'importe quel point de l'indicateur d'angle, à condition que le couple exercé soit supérieur au couple de friction. The indexing ring with its lug is mounted on the coach (14) by means of an annular friction piece of the O-ring type (27) which allows said ring to remain integral with said coach (14) during the bending operation while a torque exerted manually on its knurled periphery makes it possible to rotate it so as to bring its lug (25) opposite any point of the angle indicator, provided that the torque exerted is greater than the friction torque.
Le fonctionnement de la cintreuse ainsi réalisée est très simple : après avoir raccordé la machine à une source d'énergie électrique appropriée, l'opérateur tourne la bague d'indexation (24) jusqu'à ce que l'ergot (25) soit en face de la graduation correspondant à l'angle choisi sur l'indicateur (23). Ensuite après avoir mis en place la forme de cintrage sur l'entraineur (14), il applique le tube à cintrer dans le fond de la gorge de la forme et il l'immobilise par basculement d'un crochet et par l'approche d'une glissière (21) que l'on serre à l'aide de la vis (19). La mise en marche s'effectue alors par une simple pression sur le bouton de commande du contacteur d'alimentation. Le moteur électrique étant directement accouplé à la pompe (6), celle-ci aspire l'huile du réservoir (3) pour la refouler sous haute pression dans le vérin par le canal (31). La vis (9), la douille (13), l'entraîneur (14), la forme de cintrage (22) et la bague d'indexation (24) constituent un ensemble mobile qui va tourner jusqu'à ce que l'ergot (25) vienne appuyer sur l'interrupteur fin de course qui commande l'arrêt du moteur. The operation of the bender thus produced is very simple: after connecting the machine to an appropriate source of electrical energy, the operator turns the indexing ring (24) until the lug (25) is in face of the scale corresponding to the angle chosen on the indicator (23). Then after having set up the bending form on the coach (14), he applies the tube to be bent in the bottom of the throat of the form and he immobilizes it by tilting a hook and by approaching d 'a slide (21) which is tightened with the screw (19). The start-up is then carried out by a simple press on the control button of the power switch. The electric motor being directly coupled to the pump (6), the latter sucks the oil from the reservoir (3) to discharge it under high pressure into the cylinder through the channel (31). The screw (9), the socket (13), the driver (14), the bending form (22) and the indexing ring (24) constitute a mobile assembly which will rotate until the lug (25) press the limit switch which stops the motor.
Le retour à la position initiale ne peut commencer que si l'opérateur desserre la vis de décharge (32) qui permet à l'huile se trouvant sous pression à l'intérieur du vérin de retourner dans le réservoir (3) sous la pression de la vis (9) rappelée par le ressort (10).Return to the initial position can only start if the operator loosens the discharge screw (32) which allows the oil under pressure inside the cylinder to return to the reservoir (3) under the pressure of the screw (9) returned by the spring (10).
La cintreuse portable construite selon l'invention est donc une machine semi-automatique légère et compacte, d'un emploi très facile permettant de cintrer les tubes à paroi mince notamment ceux utilisés en plomberie, chauffage, sanitaire, tant sur les chantiers que dans les ateliers de préfabrication. The portable bender built according to the invention is therefore a light and compact semi-automatic machine, of very easy use allowing to bend thin-walled tubes in particular those used in plumbing, heating, sanitary, both on construction sites and in prefabrication workshops.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8419399A FR2574685B1 (en) | 1984-12-14 | 1984-12-14 | PORTABLE BENDER WITH ROTARY HYDRAULIC CYLINDER WITH REVERSIBLE SCREW FOR BENDING BY WINDING |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8419399A FR2574685B1 (en) | 1984-12-14 | 1984-12-14 | PORTABLE BENDER WITH ROTARY HYDRAULIC CYLINDER WITH REVERSIBLE SCREW FOR BENDING BY WINDING |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2574685A1 true FR2574685A1 (en) | 1986-06-20 |
FR2574685B1 FR2574685B1 (en) | 1988-10-14 |
Family
ID=9310747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8419399A Expired FR2574685B1 (en) | 1984-12-14 | 1984-12-14 | PORTABLE BENDER WITH ROTARY HYDRAULIC CYLINDER WITH REVERSIBLE SCREW FOR BENDING BY WINDING |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2574685B1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0374110A2 (en) * | 1988-12-16 | 1990-06-20 | C.M.L. COSTRUZIONI MECCANICHE LIRI S.r.l. | Portable pipe bending machine with electromechanical control and electronic interlocking |
EP0727583A2 (en) * | 1995-02-14 | 1996-08-21 | 1994 Weyer Family Limited Partnership | Actuator with protective end cap |
EP1238166A1 (en) * | 1999-11-23 | 2002-09-11 | 1994 Weyer Family Limited Partnership | Hydraulic collection tool |
US11590548B2 (en) | 2019-09-11 | 2023-02-28 | Ecm Industries, Llc | Powered bender |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1048435A (en) * | 1950-10-12 | 1953-12-22 | Tube bending machine, with mechanical or hydraulic control | |
US2709473A (en) * | 1947-08-18 | 1955-05-31 | Doak Aircraft Co Inc | Tube bending machine |
DE1229392B (en) * | 1959-06-03 | 1966-11-24 | Pleiger Maschf Paul | Hydraulic swivel drive for left and right rotation with limited angle of rotation |
US3417590A (en) * | 1966-05-23 | 1968-12-24 | Glover C. Ensley | Conduit bending apparatus |
FR2321960A1 (en) * | 1975-08-30 | 1977-03-25 | Ogura Chuck Mfg | Compact automatic pipe bending machine - has motor coupled to drive shaft with eccentric pin and roller in slot |
FR2483271A1 (en) * | 1980-05-28 | 1981-12-04 | Gateau Internal | TUBE SHAPING APPARATUS |
FR2515993A1 (en) * | 1981-11-12 | 1983-05-13 | Virax Sa | Hydraulic bar-bending machine - has grooves improving return feed and reduced contact area between body and cylinder end |
-
1984
- 1984-12-14 FR FR8419399A patent/FR2574685B1/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2709473A (en) * | 1947-08-18 | 1955-05-31 | Doak Aircraft Co Inc | Tube bending machine |
FR1048435A (en) * | 1950-10-12 | 1953-12-22 | Tube bending machine, with mechanical or hydraulic control | |
DE1229392B (en) * | 1959-06-03 | 1966-11-24 | Pleiger Maschf Paul | Hydraulic swivel drive for left and right rotation with limited angle of rotation |
US3417590A (en) * | 1966-05-23 | 1968-12-24 | Glover C. Ensley | Conduit bending apparatus |
FR2321960A1 (en) * | 1975-08-30 | 1977-03-25 | Ogura Chuck Mfg | Compact automatic pipe bending machine - has motor coupled to drive shaft with eccentric pin and roller in slot |
FR2483271A1 (en) * | 1980-05-28 | 1981-12-04 | Gateau Internal | TUBE SHAPING APPARATUS |
FR2515993A1 (en) * | 1981-11-12 | 1983-05-13 | Virax Sa | Hydraulic bar-bending machine - has grooves improving return feed and reduced contact area between body and cylinder end |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0374110A2 (en) * | 1988-12-16 | 1990-06-20 | C.M.L. COSTRUZIONI MECCANICHE LIRI S.r.l. | Portable pipe bending machine with electromechanical control and electronic interlocking |
EP0374110A3 (en) * | 1988-12-16 | 1991-01-02 | C.M.L. COSTRUZIONI MECCANICHE LIRI S.r.l. | Portable pipe bending machine with electromechanical control and electronic interlocking |
EP0727583A2 (en) * | 1995-02-14 | 1996-08-21 | 1994 Weyer Family Limited Partnership | Actuator with protective end cap |
EP0727583A3 (en) * | 1995-02-14 | 1998-02-25 | 1994 Weyer Family Limited Partnership | Actuator with protective end cap |
EP1238166A1 (en) * | 1999-11-23 | 2002-09-11 | 1994 Weyer Family Limited Partnership | Hydraulic collection tool |
EP1238166A4 (en) * | 1999-11-23 | 2003-07-30 | 1994 Weyer Family Ltd Partners | Hydraulic collection tool |
US11590548B2 (en) | 2019-09-11 | 2023-02-28 | Ecm Industries, Llc | Powered bender |
Also Published As
Publication number | Publication date |
---|---|
FR2574685B1 (en) | 1988-10-14 |
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