EP0033252A1 - Apparatus for feeding wound stock or rods to a machine - Google Patents

Apparatus for feeding wound stock or rods to a machine Download PDF

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Publication number
EP0033252A1
EP0033252A1 EP81400009A EP81400009A EP0033252A1 EP 0033252 A1 EP0033252 A1 EP 0033252A1 EP 81400009 A EP81400009 A EP 81400009A EP 81400009 A EP81400009 A EP 81400009A EP 0033252 A1 EP0033252 A1 EP 0033252A1
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EP
European Patent Office
Prior art keywords
crank
rack
movable clamp
movable
clamp
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.)
Withdrawn
Application number
EP81400009A
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German (de)
French (fr)
Inventor
Philippe Dargent
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.)
SA Normatic (societe Anonyme Francaise)
Original Assignee
SA Normatic (societe Anonyme Francaise)
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 SA Normatic (societe Anonyme Francaise) filed Critical SA Normatic (societe Anonyme Francaise)
Publication of EP0033252A1 publication Critical patent/EP0033252A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B65H20/18—Advancing webs by web-gripping means, e.g. grippers, clips to effect step-by-step advancement of web
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material

Definitions

  • the present invention relates to a device for moving products in reels or in bars towards a machine comprising a movable clamp and a fixed clamp which open and grasp alternately the product to be transported.
  • the movable clamp is moved in an alternating movement by means of a crank-connecting rod assembly.
  • This device is particularly suitable for metal cutting presses whose action is controlled by a crankshaft.
  • These devices include a frame carrying the clamps and means for moving the movable clamp in an alternating movement comprising a crank rotating about an axis perpendicular to the direction of movement of the movable clamp and a connecting rod articulated at the free end of the crank and the movable clamp and means for rotating the crank.
  • Such a device is known for example according to French patent n ° 1139 635 in which the drive of an eccentric articulated with a telescopic spring rod is carried out by means of the movement transmitted by a cutting press associated with the device by the through a clutch.
  • the stroke of the movable clamp is limited by stops whose spacing allows the length of the stroke to be adjusted.
  • Such devices have the disadvantage of requiring a mechanical connection between the means drive the crank to a mechanical member of the cutting press, such as a crankshaft which leads to the impossibility of making several advances and reversals of the movable clamp, then a crankshaft of the press. A rupture of the aforementioned connecting members is also to be feared in the event of blockage of the strip to be cut in the press.
  • the movable gripper with a substantially constant speed is decelerated at the end of the stroke by hydraulic or pneumatic dampers. Sudden starts, constant speed and decelerations at the end of the race constitute obstacles to obtaining high production rates.
  • the aforementioned devices are often of a high noise level and a large size.
  • the object of the present invention is to remedy the drawbacks of the aforementioned known embodiment.
  • the device contemplated by the invention for moving products in reels or in bars towards a machine such as a press, by means of a fixed clamp and a movable clamp provided with clamping means and intended to hold and release alternately the displaced product comprises a frame carrying said clamps, means for moving the movable clamp in an alternating movement comprising a crank rotating about an axis perpendicular to the direction of movement of the movable clamp and a connecting rod articulated at the free end of the crank and at the movable clamp and means being provided for rotating the crank.
  • this device is characterized in that the means for rotating the crank comprise a rack meshing with a pinion carried by the axis of the crank, this rack comprising at its opposite ends two pistons slidably mounted in a cylinder body, these two pistons being movable in the cylinder body under the action of a fluid, in an alternating translational movement.
  • the limit switches of the movable clamp correspond to the two positions angularly spaced by 180 ° in which the axis of the crank is parallel to that of the connecting rod.
  • the jack instead of directly requesting the movable clamp, acts on the latter by means of a rack, a pinion, a crank and a connecting rod, the force to be applied to the Rack pistons can be reduced, so that fluid consumption is also reduced.
  • the device for moving the metal strip 1 from a coil to the press 2 comprises a frame 3 carrying a fixed clamp 4 and a movable clamp 5. No mechanical link is provided between the device and the press.
  • the mobile clamp 5 is mounted on two parallel slides 6.
  • the fixed clamp 4 and mobile 5 have openings 8 and 7 in which the metal strip 1 is engaged.
  • the movable clamp 5 comprises an upper jaw 9 and a lower jaw 10, the latter being connected to a piston 11 slidably mounted in a cylindrical body of a pneumatic or hydraulic jack 12.
  • the fixed clamp 4 comprises an upper jaw 13 and a lower jaw 14, the latter being connected to a piston 15 slidably mounted in a cylindrical body of jack 16.
  • the device according to the invention comprises means which will be detailed below to move the movable clamp 5 in an alternating movement between a position remote from the fixed clamp 4 (see FIG. 2) and a position close to the fixed clamp 4 (see figure 3).
  • Control means not shown but conventional, jacks 12 and 16 are provided for actuating on the one hand the piston 11 upwards so as to pinch the strip 1 between the jaws 9 and 10, and on the other hand to move the piston 15 downwards, so as no longer to tighten the strip 1 in the fixed clamp 4, before the displacement of the movable clamp 5 towards the fixed clamp 4 (see arrow F in FIG. 2).
  • the aforementioned means cause the piston 15 to rise so as to retain the strip 1 in the fixed clamp 4 and also cause lowering of the piston 11 which releases the strip 1.
  • the means for moving the movable clamp 5 comprise a crank 17 capable of turning about a vertical axis XX 'perpendicular to the direction of movement of the metal strip 1.
  • the free end 18 of this crank 17 is linked by a ball joint to a connecting rod 19 which is itself linked by a ball joint to a pivot 20 of the movable clamp 5.
  • the crank 17 is carried by a shaft 21 of axis XX ' d tnt the opposite end to the crank carries a pinion 22 meshing with a rack 23.
  • This rack 23 carries at its opposite ends pistons 24 and 25 which slide in a cylindrical body of hydraulic or pneumatic cylinder 26.
  • the lines 29 and 30 are connected to a fluid distributor, not shown, which is provided for alternately introducing the fluid into the chambers 27 and 28 in order to ensure the displacement of the rack 23 according to an alternating translational movement.
  • the stroke of the rack 23 in the cylinder body 26 and the ratio of the number of teeth of the pinion 22 to that of the rack 23 are such that the crank 17 describes an angle of rotation substantially equal to 180 ° between the two limit positions shown in Figures 2 and 3.
  • crank 17 is parallel to the connecting rod 19, its articulation 18 is to the left of the axis X-X '.
  • the movable clamp 5 is in the position furthest from the fixed clamp 4, as indicated in FIG. 2.
  • the movable clamp 5 is open, the fixed clamp 4 is closed.
  • the order given by the press causes the mobile clamp 5 to be tightened and the fixed clamp 4 to open.
  • the pneumatic or hydraulic fluid is introduced into the chamber 27 of the jack 26 by the line 29 which has the effect of pushing the piston 24 in the direction of the arrow F3 (see FIG. 2).
  • the fluid contained in the chamber 28 is evacuated through the pipe 30.
  • the rack 23 rotates the crank 17 which moves by means of the connecting rod 19 the movable clamp 5 in the direction of the arrow F. This movement drives the strip 1 towards the press 2.
  • the acceleration of the translational movement of the movable clamp 5 being progressive, it is possible to use translating and clamping jacks of smaller volumes than in a jack system directly coupled to the movable clamp, which allows savings to be made. fluid consumption.
  • the movement of the movable clamp 5 undergoes a progressive deceleration ve which is also favorable to the proper functioning of the device according to the invention.
  • the movable clamp 5 reaches the end of the stroke, as indicated in FIG. 3, the jaw 14 closes, the jaw 10 opens. Then the piston 25 is pushed in the direction of the arrow F4 by the fluid introduced into the chamber 28 through the pipe 30. The movable clamp 5 thus returns to its initial position by moving in the direction of the arrow F1.
  • the device according to the invention operates smoothly, with substantially progressive accelerations and decelerations of the translational movement of the movable clamp 5 and of the strip 1.
  • the operation of the device according to the invention is thus carried out at a much lower noise level than that of known devices in which the movable clamp 5 is translated directly by a jack.
  • the movement of the strip 1 can be carried out at a higher speed, which makes it possible to obtain better production rates.
  • each shock absorber comprises a piston 33 sliding in a cylindrical body 34.
  • the pistons 33 each carry a cylindrical rod 35 extending axially into the chambers 27 and 28; the end 35a of the rod 35 of the piston 33 comes into contact with the piston 24 of the rack 23 before the end of travel of the latter.
  • the shock absorbers are similar at the two ends of the jack 26.
  • Each cylindrical body 34 of a shock absorber 31 has on its side wall, opposite the piston 33, an orifice which opens into a pipe 36 then into a reservoir 37.
  • the shape of the above orifice must be such that it allows an increasingly reduced flow of the fluid contained in the shock absorber, as the piston 33 of the shock absorber is pushed in.
  • the pipe 36 may include a bypass 38 which opens into the body of the cylinder 34 between the piston 33 and the adjacent end 26a or 26b of the jack body 26.
  • crank 17 it is also advantageous for the crank 17 to include means for adjusting the distance d between its axis of rotation XX 'and the axis YY' for fixing the connecting rod 19 (FIG. 5) to modify the stroke of the clamp. mobile 5.
  • these means comprise a screw 39 installed inside the crank 17 and supported by two bearings integral with the crank 17.
  • the end 39a of the screw is screwed into the lower part 40 of the pivot 41 on which the end 19a of the connecting rod 19 is hingedly mounted.
  • the lower part 40 of the pivot 41 is guided in the direction of elongation of the distance d in a tee groove 42 (see also Figure 1).
  • the other end 39b of the screw 39 which is located in Figure 5 to the right of the axis XX 'carries a button 43 or a crank whose rotation causes that of the screw 39.
  • a button 43 or a crank whose rotation causes that of the screw 39.
  • the nut 44 serves to lock the lower end 40 of the pivot 41 in the tee groove 42 of the crank 17.
  • crank 17 can be controlled by induction coils.
  • the device according to the invention can be used to move both a product appearing in a reel such as for example a strip or bars of various profiles, the movable and fixed clamps 4 being in these cases suitable to the shape of the product to advance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The apparatus for feeding stock, such as metal strip (1), comprises a fixed gripper (4) and a movable gripper (5) for the purpose of alternately holding and releasing the strip (1). The means for feeding the movable gripper (5) comprise a winch (17) which rotates about an axis (X-X'), a connecting rod (19) being connected in an articulated fashion to the free end (18) of the winch (17) and to the movable gripper (5). The winch (17) is rotatably driven by a rack (23) carrying pistons (24) and (25) mounted in a sliding fashion in a jack body (26) which is supplied alternately by a hydraulic or pneumatic fluid. The application is especially for feeding metal strip to a cutting press. <IMAGE>

Description

La présente invention concerne un dispositif pour déplacer des produits en bobines ou en barres vers une machine comprenant une pince mobile et une pince fixe qui s'ouvrent et saisissent alternativement le produit à transporter.The present invention relates to a device for moving products in reels or in bars towards a machine comprising a movable clamp and a fixed clamp which open and grasp alternately the product to be transported.

Dans ce type de dispositifs, la pince mobile est déplacée selon un mouvement alternatif grâce à un ensemble manivelle-bielle. Ce dispositif s'adapte en particulier aux presses àdécouper les métaux dont l'action est commandée par un vilebrequin. Ces dispositifs comprennent un bâti portant les pinces et des moyens pour déplacer la pince mobile selon un mouvement alternatif comprenant une manivelle tournant autour d'un axe perpendiculaire à la direction de déplacement de la pince mobile et une bielle articulée à l'extrémité libre de la manivelle et à la pince mobile et des moyens pour entraîner en rotation la manivelle.In this type of device, the movable clamp is moved in an alternating movement by means of a crank-connecting rod assembly. This device is particularly suitable for metal cutting presses whose action is controlled by a crankshaft. These devices include a frame carrying the clamps and means for moving the movable clamp in an alternating movement comprising a crank rotating about an axis perpendicular to the direction of movement of the movable clamp and a connecting rod articulated at the free end of the crank and the movable clamp and means for rotating the crank.

Un tel dispositif est connu par exemple selon le brevet français n° 1139 635 dans lequel l'entraînement d'un excentrique articulé avec une bielle télescopique à ressort s'effectue au moyen du mouvement transmis par une presse à découper associée au dispositif par l'intermédiaire d'un embrayage. La course de la pince mobile est limitée par des butées dont l'écartement permet de régler la longueur de la course.Such a device is known for example according to French patent n ° 1139 635 in which the drive of an eccentric articulated with a telescopic spring rod is carried out by means of the movement transmitted by a cutting press associated with the device by the through a clutch. The stroke of the movable clamp is limited by stops whose spacing allows the length of the stroke to be adjusted.

Dans un autre dispositif similaire connu selon le brevet français n° 1447 643 la rotation de la manivelle est liée de façon rigide au vilebrequin de la presse. Des butées de fin de course limitent la translation de la pince mobile. Les chocs sur les butées, sont absorbés par des ressorts logés dans la bielle.In another similar device known according to French patent n ° 1447 643 the rotation of the crank is rigidly linked to the crankshaft of the press. End-of-travel stops limit the translation of the movable clamp. Shocks on the stops are absorbed by springs housed in the connecting rod.

De tels dispositifs présentent l'inconvénient de nécessiter une liaison mécanique entre les moyens d'entraînement de la manivelle à un organe mécanique de la presse à découper, tel qu'un vilebrequin ce qui conduit à l'impossibilité d'effectuer plusieurs avances et reculs de la pince mobile, puis un tour de vilebrequin de la presse. Une rupture des organes de liaison précités, est également à craindre en cas de blocage de la bande à découper dans la presse.Such devices have the disadvantage of requiring a mechanical connection between the means drive the crank to a mechanical member of the cutting press, such as a crankshaft which leads to the impossibility of making several advances and reversals of the movable clamp, then a crankshaft of the press. A rupture of the aforementioned connecting members is also to be feared in the event of blockage of the strip to be cut in the press.

Un autre inconvénient de ces dispositifs réside dans l'emploi de butées entre lesquelles se déplace la pince mobile ce qui engendre des chocs se produisant aux fins de course de la pince mobile. De plus, lorsque la pince mobile arrive en butée un glissement du produit transporté relativement à la pince peut se produire si le choc est brutal.Another drawback of these devices lies in the use of stops between which the movable clamp moves, which generates shocks occurring at the end of travel of the movable clamp. In addition, when the movable gripper comes into abutment a sliding of the product transported relative to the gripper can occur if the shock is brutal.

Dans certains dispositifs connus, la pince mobile animée d'une vitesse sensiblement constante est décélérée en fin de course par des amortisseurs hydrauliques ou pneumatiques. Les démarrages brusques, la vitesse constante et les décélérations de fins de courses constituent des obstacles à l'obtention de cadences de productions élevées.In certain known devices, the movable gripper with a substantially constant speed is decelerated at the end of the stroke by hydraulic or pneumatic dampers. Sudden starts, constant speed and decelerations at the end of the race constitute obstacles to obtaining high production rates.

De plus, les dispositifs précités sont souvent d'un niveau sonore élevé et d'un encombrement important.In addition, the aforementioned devices are often of a high noise level and a large size.

Le but de la présente invention est de remédier aux inconvénients de la réalisation connue précitée.The object of the present invention is to remedy the drawbacks of the aforementioned known embodiment.

Le dispositif visé par l'invention pour déplacer des produits en bobines ou en barres vers une machine telle qu'une presse, au moyen d'une pince fixe et d'une pince mobile pourvues de moyens de serrage et destinées à maintenir et à lâcher alternativement le produit déplacé, comprend un bâti portant lesdites pinces, des moyens pour déplacer la pince mobile selon un mouvement alternatif comprenant une manivelle tournant autour d'un axe perpendiculaire à la direction de déplacement de la pince mobile et une bielle articulée à l'extrémité libre de la manivelle et à la pince mobile et des moyens étant prévus pour entraîner en rotation la manivelle.The device contemplated by the invention for moving products in reels or in bars towards a machine such as a press, by means of a fixed clamp and a movable clamp provided with clamping means and intended to hold and release alternately the displaced product, comprises a frame carrying said clamps, means for moving the movable clamp in an alternating movement comprising a crank rotating about an axis perpendicular to the direction of movement of the movable clamp and a connecting rod articulated at the free end of the crank and at the movable clamp and means being provided for rotating the crank.

Suivant l'invention, ce dispositif est caractérisé en ce que les moyens pour entraîner en rotation la manivelle comprennent une crémaillère engrenant avec un pignon porté par l'axe de la manivelle, cette crémaillère comportant à ses extrémités opposées deux pistons montés de façon coulissante dans un corps de vérin, ces deux pistons étant déplaçables dans le corps du vérin sous l'action d'un fluide, suivant un mouvement de translation alternatif.According to the invention, this device is characterized in that the means for rotating the crank comprise a rack meshing with a pinion carried by the axis of the crank, this rack comprising at its opposite ends two pistons slidably mounted in a cylinder body, these two pistons being movable in the cylinder body under the action of a fluid, in an alternating translational movement.

Les fins de courses de la pince mobile correspondent aux deux positions espacées angulairement de 180° dans lesquelles l'axe de la manivelle est parallèle à celui de la bielle.The limit switches of the movable clamp correspond to the two positions angularly spaced by 180 ° in which the axis of the crank is parallel to that of the connecting rod.

Grâce à cette disposition, on supprime le démarrage brusque de la pince mobile et l'on évite ainsi les risques de glissement du produit entraîné relativement à la pince mobile. A partir du démarrage, le mouvement de translation de la pince mobile est accéléré puis décéléré de façon sensiblement uniforme ce qui est favorable à l'obtention de cadences élevées et à un fonctionnement peu bruyant du dispositif.Thanks to this arrangement, the sudden start of the movable clamp is eliminated and the risks of slipping of the entrained product relative to the movable clamp are thus avoided. From start-up, the translational movement of the movable clamp is accelerated and then decelerated in a substantially uniform manner, which is favorable for obtaining high rates and low-noise operation of the device.

L'absence du lien rigide de la manivelle avec les organes de la machine (par exemple une presse) permet d'éviter la rupture des organes de liaison correspondants en cas de blocage de la bande dans la presse.The absence of the rigid link of the crank with the components of the machine (for example a press) makes it possible to avoid the rupture of the corresponding connecting members in the event of the band jamming in the press.

Contrairement aux dispositifs connus, on peut ainsi obtenir une avance du produit pendant une rotation de moins de 180°du vilebrequin de la presse, par exemple en jouant sur le débit d'échappement du fluide du vérin, qui commande le déplacement de la crémaillère. De plus, on peut également faire plusieurs avances et reculs de la pince mobile, puis un tour de vilebrequin de la presse.Unlike the known devices, it is thus possible to obtain an advance of the product during a rotation of less than 180 ° of the crankshaft of the press, for example by acting on the exhaust flow of the fluid from the jack, which controls the movement of the rack. In addition, we can also make several advances and reversing of the movable clamp, then a turn of the press crankshaft.

Etant donné que le vérin, au lieu de solliciter directement la pince mobile, agit sur cette dernière par l'intermédiaire d'une crémaillère, d'un pignon, d'une manivelle et d'une bielle, l'effort à appliquer sur les pistons de la crémaillère peut être réduit, de sorte que la consommation de fluide s'en trouve également réduite.Since the jack, instead of directly requesting the movable clamp, acts on the latter by means of a rack, a pinion, a crank and a connecting rod, the force to be applied to the Rack pistons can be reduced, so that fluid consumption is also reduced.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will appear in the description below.

Aux dessins annexés, donnés à titre d'exemples non limitatifs:

  • - la figure 1 est une vue en perspective avec arrachement de certaines parties du dispositif conforme à l'invention;
  • - la figure 2 est une vue en élévation du dispositif avec coupes longitudinales partielles, placé à proximité d'une presse représentée seulement en partie, ce dispositif montrant la pince mobile en position éloignée de la pince fixe;
  • - la figure 3 est une vue analogue à la figure 2, montrant la pince mobile en position rapprochée de la pince fixe;
  • - la figure 4 est une vue en coupe longitudinale à plus grande échelle du vérin du dispositif avec des amortisseurs et conduites d'alimentation en fluide,
  • - la figure 5 est uen vue en coupe longitudinale partielle de la manivelle montrant la vis de réglage de l'avance et son articulation à l'extrémité de la bielle.
In the appended drawings, given by way of nonlimiting examples:
  • - Figure 1 is a perspective view with cutaway of certain parts of the device according to the invention;
  • - Figure 2 is an elevational view of the device with partial longitudinal sections, placed near a press shown only in part, this device showing the movable clamp in a position remote from the fixed clamp;
  • - Figure 3 is a view similar to Figure 2 showing the movable clamp in the position close to the fixed clamp;
  • FIG. 4 is a view in longitudinal section on a larger scale of the actuator of the device with shock absorbers and fluid supply lines,
  • - Figure 5 is a partial longitudinal sectional view of the crank showing the feed adjustment screw and its articulation at the end of the connecting rod.

Dans la réalisation des figures 1 à 3, le dispositif pour déplacer la bande métallique 1 provenant d'une bobine vers la presse 2 (voir figures 2 et 3) comprend un bâti 3 portant une pince fixe 4 et une pince mobile 5. Aucun lien mécanique n'est prévu entre le dispositif et la presse. La pince mobile 5 est montée sur deux glissières parallèles 6. Les pinces fixe 4 et mobile 5 possèdent des ouvertures 8 et 7 dans lesquelles est engagée la bande métallique 1.In the embodiment of Figures 1 to 3, the device for moving the metal strip 1 from a coil to the press 2 (see Figures 2 and 3) comprises a frame 3 carrying a fixed clamp 4 and a movable clamp 5. No mechanical link is provided between the device and the press. The mobile clamp 5 is mounted on two parallel slides 6. The fixed clamp 4 and mobile 5 have openings 8 and 7 in which the metal strip 1 is engaged.

La pince mobile 5 comporte une mâchoire supérieure 9 et une mâchoire inférieure 10, cette dernière étant reliée à un piston 11 monté de façon coulissante dans un corps cylindrique de vérin 12 pneumatique ou hydraulique.The movable clamp 5 comprises an upper jaw 9 and a lower jaw 10, the latter being connected to a piston 11 slidably mounted in a cylindrical body of a pneumatic or hydraulic jack 12.

De même, la pince fixe 4 comporte une mâchoire supérieure 13 et une mâchoire inférieure 14, cette dernière étant reliée à un piston 15 monté de façon coulissante dans un corps cylindrique de vérin 16.Likewise, the fixed clamp 4 comprises an upper jaw 13 and a lower jaw 14, the latter being connected to a piston 15 slidably mounted in a cylindrical body of jack 16.

Le dispositif conforme à l'invention comprend des moyens que l'on détaillera plus loin pour déplacer la pince mobile 5 selon un mouvement alternatif entre une position éloignée de la pince fixe 4 (voir figure 2) et une position rapprochée de la pince fixe 4 (voir figure 3).The device according to the invention comprises means which will be detailed below to move the movable clamp 5 in an alternating movement between a position remote from the fixed clamp 4 (see FIG. 2) and a position close to the fixed clamp 4 (see figure 3).

Des moyens de commande non représentés mais classiques, des vérins 12 et 16 sont prévus pour actionner d'une part le piston 11 vers le haut de façon à pincer la bande 1 entre les mâchoires 9 et 10, et d'autre part déplacer le piston 15 vers le bas, de façon à ne plus serrer la bande 1 dans la pince fixe 4, avant le déplacement de la pince mobile 5 vers la pince fixe 4 (voir flèche F de la figure 2).Control means not shown but conventional, jacks 12 and 16 are provided for actuating on the one hand the piston 11 upwards so as to pinch the strip 1 between the jaws 9 and 10, and on the other hand to move the piston 15 downwards, so as no longer to tighten the strip 1 in the fixed clamp 4, before the displacement of the movable clamp 5 towards the fixed clamp 4 (see arrow F in FIG. 2).

Inversement, avant le déplacement de la pince mobile 5 vers sa position initiale éloignée de la pince fixe 4 (voir flèche F1 de la figure 3), les moyens précités provoquent la montée du piston 15 de façon à retenir la bande 1 dans la pince fixe 4 et provoquent également la descente du piston 11 qui libère la bande 1.Conversely, before the movable clamp 5 moves to its initial position remote from the fixed clamp 4 (see arrow F1 in FIG. 3), the aforementioned means cause the piston 15 to rise so as to retain the strip 1 in the fixed clamp 4 and also cause lowering of the piston 11 which releases the strip 1.

Conformément à l'invention, les moyens pour déplacer la pince mobile 5 comprennent une manivelle 17 capable de tourner autour d'un axe vertical X-X' perpendiculaire à la direction de déplacement de la bande métallique 1. L'extrémité libre 18 de cette manivelle 17 est liée par une rotule à une bielle 19 qui est elle-même liée par une rotule sur un pivot 20 de la pince mobile 5.According to the invention, the means for moving the movable clamp 5 comprise a crank 17 capable of turning about a vertical axis XX 'perpendicular to the direction of movement of the metal strip 1. The free end 18 of this crank 17 is linked by a ball joint to a connecting rod 19 which is itself linked by a ball joint to a pivot 20 of the movable clamp 5.

Le manivelle 17 est portée par un arbre 21 d'axe X-X' dtnt l'extrémité opposée à la manivelle porte un pignon 22 engrenant avec une crémaillère 23. Cette crémaillère 23 porte à ses extrémités opposées des pistons 24 et 25 qui coulissent dans un corps cylindrique de vérin hydraulique ou pneumatique 26.The crank 17 is carried by a shaft 21 of axis XX ' d tnt the opposite end to the crank carries a pinion 22 meshing with a rack 23. This rack 23 carries at its opposite ends pistons 24 and 25 which slide in a cylindrical body of hydraulic or pneumatic cylinder 26.

Les extrémités opposées du corps de vérin 26 compétent des chambres 27 et 28 dans lesquelles débouchent des conduites 29 et 30 d'alimentation en fluide.The opposite ends of the competent cylinder body 26 of the chambers 27 and 28 into which open the fluid supply lines 29 and 30.

Les conduites 29 et 30 sont reliées à un distributeur de fluide non représenté, celui-ci étant prévu pour introduire alternativement le fluide dans les chambres 27 et 28 afin d'assurer le déplacement de la crémaillère 23 selon un mouvement de translation alternatif.The lines 29 and 30 are connected to a fluid distributor, not shown, which is provided for alternately introducing the fluid into the chambers 27 and 28 in order to ensure the displacement of the rack 23 according to an alternating translational movement.

La course de la crémaillère 23 dans le corps de vérin 26 et le rapport du nombre de dents du pignon 22 sur celui de la crémaillère 23 sont tels que la manivelle 17 décrit un angle de rotation sensiblement égal à 180° entre les deux positions limites représentées sur les figures 2 et 3.The stroke of the rack 23 in the cylinder body 26 and the ratio of the number of teeth of the pinion 22 to that of the rack 23 are such that the crank 17 describes an angle of rotation substantially equal to 180 ° between the two limit positions shown in Figures 2 and 3.

Le fonctionnement du dispositif que l'on vient de décrire est le suivant (voir figures 2 et 3).The operation of the device that has just been described is as follows (see Figures 2 and 3).

Au départ la manivelle 17 est parallèle à la bielle 19, son articulation 18 est à gauche de l'axe X-X'. La pince mobile 5 se trouve dans la position la plus éloignée de la pince fixe 4, comme indiqué sur la figure 2.At the start, the crank 17 is parallel to the connecting rod 19, its articulation 18 is to the left of the axis X-X '. The movable clamp 5 is in the position furthest from the fixed clamp 4, as indicated in FIG. 2.

La pince mobile 5 est ouverte, la pince fixe 4 est fermée.The movable clamp 5 is open, the fixed clamp 4 is closed.

L'ordre donné par la presse provoque le serrage de la pince mobile 5 et l'ouverture de la pince fixe 4.The order given by the press causes the mobile clamp 5 to be tightened and the fixed clamp 4 to open.

Ensuite le fluide pneumatique ou hydraulique est introduit dans la chambre 27 du vérin 26 par la conduite 29 ce qui a pour effet de pousser le piston 24 dans le sens de la flèche F3 (voir figure 2). Le fluide contenu dansla chambre 28 est évacué par la conduite 30. La crémaillère 23 entraîne en rotation la manivelle 17 qui déplace au moyen de la bielle 19 la pince mobile 5 dans le sens de la flèche F. Ce déplacement entraîne la bande 1 vers la presse 2.Then the pneumatic or hydraulic fluid is introduced into the chamber 27 of the jack 26 by the line 29 which has the effect of pushing the piston 24 in the direction of the arrow F3 (see FIG. 2). The fluid contained in the chamber 28 is evacuated through the pipe 30. The rack 23 rotates the crank 17 which moves by means of the connecting rod 19 the movable clamp 5 in the direction of the arrow F. This movement drives the strip 1 towards the press 2.

Jusqu'à la moitié de la course de la pince mobile 5 le mouvement de celle-ci s'accélère progressivement car la manivelle 17 engendre une translation de plus en plus rapide au fur et à mesure que son angle de rotation croît à partir de la position initiale.Up to half the stroke of the movable clamp 5, the movement thereof accelerates progressively because the crank 17 generates a translation which becomes faster and faster as its angle of rotation increases from the initial position.

On évite ainsi une accélération brutale de la pince mobile 5 susceptible d'entraîner un glissement relatif de la bande 1 par rapport aux mâchoires 9 et 10, ce qui engendrerait des erreurs de positionnement de la bande 1 par rapport à la presse 2.This avoids sudden acceleration of the movable clamp 5 capable of causing a relative sliding of the strip 1 with respect to the jaws 9 and 10, which would cause positioning errors of the strip 1 relative to the press 2.

L'accélération du mouvement de translation de la pince mobile 5 étant progressive, on peut utiliser des vérins de translation et de serrage de plus faibles volumes que dans un système à vérin attelé directement à la pince mobile, ce qui permet de réaliser des économies de consommation de fluide.The acceleration of the translational movement of the movable clamp 5 being progressive, it is possible to use translating and clamping jacks of smaller volumes than in a jack system directly coupled to the movable clamp, which allows savings to be made. fluid consumption.

Au-delà de la moitié de la course le déplacement de la pince mobile 5 subit une décélération progressive qui est également favorable au bon fonctionnement du dispositif conforme à l'invention. Lorsque la pince mobile 5 arrive en fin de course, comme indiqué sur la figure 3, la mâchoire 14 se ferme, la mâchoire 10 s'ouvre. Ensuite le piston 25 est poussé dans le sens de la flèche F4 par le fluide introduit dans la chambre 28 par la conduite 30. La pince mobile 5 revient ainsi vers sa position initiale en se déplaçant dans le sens de la flèche F1.Beyond half the stroke, the movement of the movable clamp 5 undergoes a progressive deceleration ve which is also favorable to the proper functioning of the device according to the invention. When the movable clamp 5 reaches the end of the stroke, as indicated in FIG. 3, the jaw 14 closes, the jaw 10 opens. Then the piston 25 is pushed in the direction of the arrow F4 by the fluid introduced into the chamber 28 through the pipe 30. The movable clamp 5 thus returns to its initial position by moving in the direction of the arrow F1.

L'expérience a montré que le fonctionnement du dispositif conforme à l'invention s'effectuait sans à coups, avec des accélérations et décélérations sensiblement progressives du mouvement de translation de la pince mobile 5 et de la bande 1. Le fonctionnement du dispositif conforme à l'invention s'effectue ainsi à un niveau sonore beaucoup plus réduit que celui des dispositifs connus dans lesquels la pince mobile 5 est translatée directement par un vérin. Par ailleurs, le déplacement de la bande 1 peut être réalisé à une vitesse plus élevée, ce qui permet d'obtenir de meilleures cadences de production.Experience has shown that the device according to the invention operates smoothly, with substantially progressive accelerations and decelerations of the translational movement of the movable clamp 5 and of the strip 1. The operation of the device according to the invention is thus carried out at a much lower noise level than that of known devices in which the movable clamp 5 is translated directly by a jack. Furthermore, the movement of the strip 1 can be carried out at a higher speed, which makes it possible to obtain better production rates.

Pour améliorer le fonctionnement du dispositif conforme à l'invention, il est avantageux que le corps du vérin 26 porte à ses extrémités opposées 26a et 26b des amortisseurs 31 et 32 comme indiqué sur la figure 4. Chaque amortisseur comporte un piston 33 coulissant dans un corps cylindrique 34. Les pistons 33 portent chacun une tige cylindrique 35 pénétrant axialement dans les chambres 27 et 28; l'extrémité 35a de la tige 35 du piston 33, vient en contact avec le piston 24 de la crémaillère 23 avant la fin de course de cette dernière.To improve the functioning of the device according to the invention, it is advantageous for the body of the cylinder 26 to carry at its opposite ends 26a and 26b shock absorbers 31 and 32 as shown in FIG. 4. Each shock absorber comprises a piston 33 sliding in a cylindrical body 34. The pistons 33 each carry a cylindrical rod 35 extending axially into the chambers 27 and 28; the end 35a of the rod 35 of the piston 33 comes into contact with the piston 24 of the rack 23 before the end of travel of the latter.

Les amortisseurs sont analogues aux deux extrémités du vérin 26. Chaque corps cylindrique 34 d'un amortisseur 31 comporte sur sa paroi latérale, à l'opposé du piston 33 un orifice qui débouche dans une conduite 36 puis dans un réservoir 37. La forme de l'orifice ci-dessus doit être telle qu'elle permette un écoulement de plus en plus réduit du fluide contenu dans l'amortisseur, au fur et à mesure de l'enfoncement du piston 33 de l'amortisseur. La conduite 36 peut comporter une dérivation 38 qui débouche dans le corps du cylindre 34 entre le piston 33 et l'extrémité adjacente 26a ou 26b du corps de vérin 26.The shock absorbers are similar at the two ends of the jack 26. Each cylindrical body 34 of a shock absorber 31 has on its side wall, opposite the piston 33, an orifice which opens into a pipe 36 then into a reservoir 37. The shape of the above orifice must be such that it allows an increasingly reduced flow of the fluid contained in the shock absorber, as the piston 33 of the shock absorber is pushed in. The pipe 36 may include a bypass 38 which opens into the body of the cylinder 34 between the piston 33 and the adjacent end 26a or 26b of the jack body 26.

Lorsque la crémaillère 23 se déplace dans le sens de la flèche F3 au voisinage de sa fin de course, le piston 25 rencontre l'extrémité 35a de la tige 35 du piston 33. Ce dernier pousse le fluide qui s'échappe par la conduite 36 produisant ainsi l'effet d'amortissement.When the rack 23 moves in the direction of the arrow F3 near its end of travel, the piston 25 meets the end 35a of the rod 35 of the piston 33. The latter pushes the fluid which escapes through the pipe 36 thus producing the damping effect.

Il est avantageux d'autre part que la manivelle 17 comprenne des moyens pour régler la distance d comprise entre son axe de rotation X-X' et l'axe Y-Y' de fixation de la bielle 19 (figure 5) pour modifier la course de la pince mobile 5.It is also advantageous for the crank 17 to include means for adjusting the distance d between its axis of rotation XX 'and the axis YY' for fixing the connecting rod 19 (FIG. 5) to modify the stroke of the clamp. mobile 5.

Dans l'exemple représenté sur la figure 5, ces moyens comprennent une vis 39 installée à l'intérieur de la manivelle 17 et supportée par deux paliers solidaires de la manivelle 17.In the example shown in FIG. 5, these means comprise a screw 39 installed inside the crank 17 and supported by two bearings integral with the crank 17.

L'extrémité 39a de la vis est vissée dans la partie inférieure 40 du pivot 41 sur lequel est montée de façon articulée l'extrémité 19a de la bielle 19.The end 39a of the screw is screwed into the lower part 40 of the pivot 41 on which the end 19a of the connecting rod 19 is hingedly mounted.

La partie inférieure 40 du pivot 41 est guidée suivant la direction d'allongement de la distance d dans une rainure en té 42 (voir également figure 1).The lower part 40 of the pivot 41 is guided in the direction of elongation of the distance d in a tee groove 42 (see also Figure 1).

L'autre extrémité 39b de la vis 39 qui est située sur la figure 5 à droite de l'axe X-X' porte un bouton 43 ou une manivelle dont la rotation provoque celle de la vis 39. Ainsi en tournant le bouton dans le sens du vissage on entraîne la partie inférieure 40 du pivot 41 dans le sens de la flèche F6 vers l'axe X-X'. Inversement en dévissant la vis 39 on allonge la distance d.The other end 39b of the screw 39 which is located in Figure 5 to the right of the axis XX 'carries a button 43 or a crank whose rotation causes that of the screw 39. Thus by turning the button in the direction of screwing the lower part 40 pivot 41 in the direction of arrow F6 towards the axis X -X ' . Conversely, by unscrewing the screw 39, the distance d is lengthened.

L'écrou 44 sert au blocage de l'extrémité inférieure 40 du pivot 41 dans la rainure en té 42 de la manivelle 17.The nut 44 serves to lock the lower end 40 of the pivot 41 in the tee groove 42 of the crank 17.

La translation de la pince mobile 5 par la manivelle 17 et la bielle 19 offre ainsi de nombreux avantages par rapport à l'art antérieur, selon lequel cette pince mobile était translatée directement par un vérin.The translation of the movable clamp 5 by the crank 17 and the connecting rod 19 thus offers many advantages compared to the prior art, according to which this movable clamp was translated directly by a jack.

Bien entendu, l'invention n'est pas limitée à l'exemple que l'on vient de décrire et l'on peut apporter à celui-ci de nombreuses modifications sans sortir du cadre de l'invention.Of course, the invention is not limited to the example which has just been described and many modifications can be made to it without departing from the scope of the invention.

Ainsi la rotation de la manivelle 17 peut être commandée par des bobines d'induction.Thus the rotation of the crank 17 can be controlled by induction coils.

D'autre part, le dispositif conforme à l'invention peut être utilisé pour déplacer aussi bien un produit se présentant en bobine tel que par exemple un feuillard ou des barres de profils divers, les pinces mobile 5 et fixe 4 étant dans ces cas adaptées à la forme du produit à avancer.On the other hand, the device according to the invention can be used to move both a product appearing in a reel such as for example a strip or bars of various profiles, the movable and fixed clamps 4 being in these cases suitable to the shape of the product to advance.

Claims (4)

1. Dispositif pour déplacer des produits en bobines ou en barres vers une machine, au moyen d'une pince fixe et d'une pince mobile pourvues de moyens de serrage et destinées à maintenir et à lâcher alternativement le produit déplacé, ce dispositif comprenant un bâti portant lesdites pinces, des moyens pour déplacer la pince mobile selon un mouvement alternatif comprenant une manivelle (17) tournant autour d'un axe (X-X') perpendiculaire à la direction de déplacement de la pince mobile (5) et une bielle (19) articulée à l'extrémité libre (18) de la manivelle (17) et à la pince mobile (5) et des moyens (22, 23, 24, 25 et 26) étant prévus pour entraîner en rotation la manivelle (17), caractérisé en ce que les moyens pour entraîner en rotation la manivelle (17) comprennent une crémaillère (23) engrenant avec un pignon (22) porté par l'axe de la manivelle (17), cette crémaillère (23) comportant à ses extrémités opposées deux pistons (24, 25) montés de façon coulissante dans un corps de vérin (26), ces deux pistons étant déplaçables dans le corps du vérin sous l'action d'un fluide, suivant un mouvement de translation alternatif.1. Device for moving products in reels or bars towards a machine, by means of a fixed clamp and a movable clamp provided with clamping means and intended to hold and release alternately the displaced product, this device comprising a frame carrying said grippers, means for moving the movable gripper in a reciprocating motion comprising a crank (17) rotating about an axis (X-X ') perpendicular to the direction of movement of the movable gripper (5) and a connecting rod (19) articulated at the free end (18) of the crank (17) and to the movable clamp (5) and means (22, 23, 24, 25 and 26) being provided for rotating the crank (17 ), characterized in that the means for rotating the crank (17) comprise a rack (23) meshing with a pinion (22) carried by the axis of the crank (17), this rack (23) comprising at its opposite ends two pistons (24, 25) slidably mounted in a body of veri n (26), these two pistons being movable in the body of the jack under the action of a fluid, in an alternating translational movement. 2. Dispositif conforme à la revendication 1, caractérisé en ce que la course de la crémaillère (23) dans le corps du vérin (26) et le rapport du nombre de dents du pignon (22) sur celui de la crémaillère (23) sont tels que la manivelle (17) décrit un angle de rotation sensiblement égal à 180°.2. Device according to claim 1, characterized in that the stroke of the rack (23) in the cylinder body (26) and the ratio of the number of teeth of the pinion (22) to that of the rack (23) are such as the crank (17) describes an angle of rotation substantially equal to 180 °. 3. Dispositif conforme à la revendication 1 ou 2, caractérisé en ce que le corps de vérin (26) comporte à ses extrémités opposées des amortisseurs (31) et (32) pour décélérer en fin de course la crémaillère (23) et les pistons (24) et (25).3. Device according to claim 1 or 2, characterized in that the cylinder body (26) has at its opposite ends dampers (31) and (32) for decelerating the rack (23) and the pistons at the end of the stroke (24) and (25). 4. Dispositif conforme à l'une quelconque des revendications 1 à 3, caractérisé en ce que la manivelle (17) comprend des moyens (39), (40), pour régler la distance (d) comprise entre son axe de rotation (X-X') et son articulation (41) à la bielle (19).4. Device according to any one of Claims 1 to 3, characterized in that the crank (17) comprises means (39), (40), for adjusting the distance (d) between its axis of rotation (X-X ') and its articulation (41) with the connecting rod (19).
EP81400009A 1980-01-24 1981-01-07 Apparatus for feeding wound stock or rods to a machine Withdrawn EP0033252A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8001522 1980-01-24
FR8001522A FR2474357A1 (en) 1980-01-24 1980-01-24 DEVICE FOR MOVING COIL OR BAR PRODUCTS TO A MACHINE

Publications (1)

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EP0033252A1 true EP0033252A1 (en) 1981-08-05

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EP81400009A Withdrawn EP0033252A1 (en) 1980-01-24 1981-01-07 Apparatus for feeding wound stock or rods to a machine

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EP (1) EP0033252A1 (en)
FR (1) FR2474357A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092849A1 (en) * 1982-04-28 1983-11-02 Yoshida Kogyo K.K. Intermittent feed mechanism
EP0125367A1 (en) * 1983-05-04 1984-11-21 E. Bruderer Maschinenfabrik AG Gripper feeding device for presses or the like
US4925078A (en) * 1987-12-23 1990-05-15 Leinhaas Industrieberatung Gripper feed device
NL1019658C2 (en) * 2001-12-24 2003-06-30 Wilto Engineering Loading device with manipulator for transferring cut sheets of film onto transport system has movable clamp and cutting device mounted on sleigh
WO2011053912A1 (en) 2009-10-30 2011-05-05 Vamco International, Inc. Material feeding apparatus with gripper driving member and linkage
CN103586935A (en) * 2012-08-15 2014-02-19 盐城市协和机械有限公司 Die-cutting process and die-cutting production equipment for abrasive paper and cloth

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102527849B (en) * 2012-01-12 2013-12-25 天津市津荣天宇精密机械有限公司 Scrapless soldering lug punching and riveting mechanism in mould

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FR2383866A1 (en) * 1977-03-17 1978-10-13 Bihler Otto ADVANCING DEVICE FOR BAND MATERIALS

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US1406310A (en) * 1921-04-07 1922-02-14 Harry C H Walsh Automatic feed mechanism for punch presses
FR846904A (en) * 1938-07-25 1939-09-28 Gardy Particip App Automatic device for advancing the workpiece in a column block
US2825560A (en) * 1955-08-19 1958-03-04 Danly Mach Specialties Inc Grip feed
FR1139635A (en) * 1955-10-13 1957-07-03 Cie Ind Francaise Tubes Elect Precision automatic feeder
FR1362867A (en) * 1963-07-04 1964-06-05 Norton Tool Company Ltd Improvements to feed mechanisms, in particular for presses
FR1447643A (en) * 1964-09-22 1966-07-29 May Pressenbau Gmbh Feeding device for products in the form of strips or ribbons
US3462056A (en) * 1967-08-15 1969-08-19 Albert W Scribner Stock feeder
DE2153991C3 (en) * 1971-10-29 1981-07-16 L. Schuler GmbH, 7320 Göppingen Conveyor device with conveyor tongs for the step-by-step feeding of sheet metal strips or sheet metal strips
DE2454460A1 (en) * 1974-11-16 1976-05-20 Grau Erich Stanzwerk Elek FEED DEVICE FOR INTERMITTING MATERIAL FEEDING TO PUNCHES OR PRESSES

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FR2383866A1 (en) * 1977-03-17 1978-10-13 Bihler Otto ADVANCING DEVICE FOR BAND MATERIALS

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092849A1 (en) * 1982-04-28 1983-11-02 Yoshida Kogyo K.K. Intermittent feed mechanism
EP0125367A1 (en) * 1983-05-04 1984-11-21 E. Bruderer Maschinenfabrik AG Gripper feeding device for presses or the like
US4925078A (en) * 1987-12-23 1990-05-15 Leinhaas Industrieberatung Gripper feed device
NL1019658C2 (en) * 2001-12-24 2003-06-30 Wilto Engineering Loading device with manipulator for transferring cut sheets of film onto transport system has movable clamp and cutting device mounted on sleigh
WO2011053912A1 (en) 2009-10-30 2011-05-05 Vamco International, Inc. Material feeding apparatus with gripper driving member and linkage
EP2493636A4 (en) * 2009-10-30 2017-01-04 Vamco International, Inc. Material feeding apparatus with gripper driving member and linkage
CN103586935A (en) * 2012-08-15 2014-02-19 盐城市协和机械有限公司 Die-cutting process and die-cutting production equipment for abrasive paper and cloth
CN103586935B (en) * 2012-08-15 2016-03-16 盐城市协和机械有限公司 Sand paper Bu Moqie severing technique and production equipment thereof

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FR2474357A1 (en) 1981-07-31
FR2474357B1 (en) 1983-09-16

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