EP0607742B1 - Appareil automatique d'alimentation des rivets pour une riveteuse et procédé pour sa mise en oeuvre - Google Patents
Appareil automatique d'alimentation des rivets pour une riveteuse et procédé pour sa mise en oeuvre Download PDFInfo
- Publication number
- EP0607742B1 EP0607742B1 EP19930500174 EP93500174A EP0607742B1 EP 0607742 B1 EP0607742 B1 EP 0607742B1 EP 19930500174 EP19930500174 EP 19930500174 EP 93500174 A EP93500174 A EP 93500174A EP 0607742 B1 EP0607742 B1 EP 0607742B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- duct
- casing
- rivet
- riveting
- pin
- 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.)
- Revoked
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/10—Riveting machines
- B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
- B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements
Definitions
- the device this invention relates to consists in a uncomplicated automatic mechanism for feeding blind rivets of the type which include a rivet body or head portion, an annular flange or washer and a removable stem or pin, and which are designed for being arranged in the opening of a standard oil-pneumatic or pneumatic riveting machine usually marketed, with a head section which embodies a chuck which includes a gripping mechanism to lock the rivet pin or stem positioned within it, and a dynamic fluid cylinder for closing the said gripping mechanism and applying a backward tensile stress in order to deform the rivet head portion until the said stem is detached, which is being removed by suction through an duct axial to the said heat section, embodying likewise in general, means for individual feeding of the said rivets, for example by pneumatic conveyance, in a predetermined position toward the riveting gun.
- the device according to the invention was devised to constitute a set together with a pistol-type riveting machine which allows its use as self fed hand riveting pistol, to be incorporated to robot arms or, using suitable supports, work as a machine or static unit of automatic riveting, having access only by one of the sides of the two pieces to connect.
- the European patent EP 285739 discloses a device for positioning blind rivets, which is associated to a pistol body to which the blind rivets are fed, one by one, with the pin or stem in back position, comprising a collet which, through a set of levers moves to position the pin of related rivet in the interior of the front opening or mouth of the riveting head.
- the device proposed is complex, it takes a significant place, namely close to the front part of the riveting tool, which limits the operation freedom and when moving the rivet outside the said riveting tool, there exists the risk of causing accidents when handling the set.
- a certain number of cycles could fail, due to a poor pointing of the rivet pin in the mouth of the riveting head, because of lack of guide.
- Patent US 4205547 proposes a rivet positioning device, which includes likewise a set of levers and collet outside the riveting tool for positioning the rivet pin or stem in the interior of the front opening of the riveting head.
- the said levers are mounted on a slide external to the body of the riveting tool for its displacement from a rivet collection point up to another one for conveying it to the said collet.
- This device likewise means a significant structural complexity and is very bulky, therefore it affects the tool manoeuvrability.
- French patent FR-A-2587246 discloses a device having similar characteristics, designed for a robot unit with guiding means for mentioned positioning levers.
- Patent US 5042131 discloses a device to feed rivets to a riveting tool, comprising a duct which leads to a recess, coaxial to and in the front of the riveting head , the end portion of the said duct being pivoting with respect to the grips of that riveting head, which, when moving forward takes the said tube sideward until catching the rivet by its pin , and when it goes backward, the tube returns to its feeding position.
- This device has the drawback of an irregular positioning of the rivets due to a poor orientation of the pivoting tube, which, in addition, sustains a wear because of the friction with the riveting head, compelling to use specially resistant and expensive materials, or to replace the said tube from time to time.
- patent US 4027520 it does not disclose a device that can be associated to a riveting tool, but a special gun in which the rivet is conveyed by pneumatic conveyance close to the front end of the said gun, having access to the interior of a recess frontally delimited by means of flexible collet, being thereafter held by a grip which is moving forward toward the said recess, and pushed until the rivet head portion protrudes externally to the gun and is ready for the riveting operation.
- the said structure is not applicable to a conventional riveting gun or tool, as in above disclosed devices, and, in addition, the initial position of the rivets in the said recess is critical, as they are conveyed to the said point by fluid dynamic means and at a certain speed, which may produce an incorrect arrangement of the rivet in the said recess which gives rise to problems, and requires that means for a temporary retention of the rivet in that recess are provided, until the rivet is held by the grip of the riveting tool.
- the expelling of rivet pins after the riveting operation is performed directly outside, or it requires that a collecting container associated to the gun is provided, which, once more, means a restriction of the manoeuvrability.
- the device this invention is referring to tries to overcome above problems, and proposes for such purpose means and a methodology for positioning the rivets in the front section of a quite simple riveting tool, constituting a set applicable to any conventional tool such as a riveting gun or similar, which means a minimum volume increase and which virtually does not affect the working front section, involving only a slight increase of weight and therefore an optimum manoeuvrability of the set with evacuation of the rivet pins axially to the riveting tool, backwardly and up to a collection point at a distance from the working point, and a very safe positioning of the rivets allowing them to be held by the grips.
- the device is, in addition easily adaptable to any riveting tool and, namely, it is applicable as it has been said to riveting guns.
- the device involved comprises a support associated to the riveting tool body dealt with, on which side pneumatic cylinders are fasten to, the said cylinders causing that an external casing which surrounds the gripping mechanism front end of the said riveting tool moves forward or backward, in due time, and which telescopically slides on itself.
- This casing incorporates at its end a plurality of collet fingers, in radial arrangement around an axis coaxial to the gripping mechanism axis, hinged by its back end to the casing, and which may be opened, defining a front central opening for the rivet passing, or to remain closed, locking the said rivet pin, an external elastic ring having been provided which tends to keep the said collet fingers in a closed position and a collar which encloses the back ends of the said collet fingers, with a small play.
- the casing possesses in addition an inlet side duct for the rivets conveyed by compressed air, according to conventional art, in a predetermined position.
- the device is following disclosed together with its methodology illustrated by means of its operation cycle:
- a recess is formed between the gripholder and the collet fingers located at the end of the said casing, in whose interior comes the rivet through a side manifold connected to the inlet duct and coming from an automatic dosing vibrator located in a self-contained piece of furniture which incorporates the electro-pneumatic installation.
- the pin detached from the rivet head portion remains locked by the riveting grips.
- the two external cylinders make the casing moves forward, the retractable pivot is taken apart releasing the central duct, at same time that the riveting grips release the pin which is sucked backward by a vacuum pump and conducted through a tube toward a collector located in a self-contained piece of furniture.
- the following rivet is automatically introduced in the recess.
- the displacement of the said retractable pivot is performed by means of a cam shape which operates it in correspondence with the forward movement of the casing toward the grip mechanism, or by a lever mechanism, driven by a pneumatic cylinder, controlled by a sequentially programmed electronic device to push the said pivot toward a position of interference with the central duct of the grip mechanism in due moment and regardless of the casing movement.
- a spring coaxial to the said retractable pivot tends to keep it apart from its position of intercepting the axial duct of the grip mechanism.
- the device according to the invention is applicable to the positioning of blind rivets formed by a rivet 2 body or head portion -2-, a flange or washer -3- and a pin or stem -4-, removable (see Fig. 2), in a riveting machine such as a fluid dynamic riveting pistol -10-, with a section of head which embodies a chuck -17- fed with a spring -7-, the said chuck comprises a gripping mechanism -25- designed for holding the pin -4- of the rivet positioned within thereof, and an internal fluid dynamic cylinder to close the said gripping mechanism and to apply a tensile stress with the purpose of deforming the rivet head portion -2- until detaching the said pin -4-, which is evacuated through a duct -9- axial to the said head section, which likewise embodies means for individual feeding of the said rivets such as a pneumatic conveyance, at a predetermined position, toward the said riveting pistol.
- a riveting machine such as a fluid dynamic riveting pistol
- the device is characterized in that it includes:
- the said manifold -5- supplying the rivets has an inclined orientation with respect to the lengthwise axis of the chamber -32- and has connected a flexible duct -35- to feed the rivets, the manifold -5- remaining in opposition with respect to the riveting pistol -10- handle or to a supporting element of the riveting tool involved.
- the means for displacing the casing -12, telescopically with respect to the chuck of the riveting pistol, comprise external pneumatic cylinders supported on a support -22- secured to the riveting pistol -10- body, and drawn in their two positions of retraction and extension in the two semi-halves of figure 1.
- the stems --14- which are oriented in parallelism to the duct axis - 34-, are connected by their ends to some appendages -18- solid with the casing -12- as it is shown in figures 1, 7 and 8.
- Fig. 1 likewise details an elastic stop -20-, coaxial to the said stems -14- designed to limit the displacement in retraction of the casing -12-.
- a part -18- or coupling nipple of the pistol axial duct -9- (Fig. 2) is shown with a vacuum pump --11- for evacuating the pins detached from the rivets, which are advantageously conducted to a far collection point, by a flexible tubular duct -23-.
- the collet -1- in the front part of the casing -12-, comprises a plurality of collet fingers -36- in radial arrangement around a coaxial axis with the central duct -34-, of the gripping mechanism -25-, hinged by their back end, which may be opened forming a front central opening having a diameter slightly larger than the washer -3- and body -2- of the rivet, or may remain closed defining a central front hole - 33-, suitable to lock the pin -4- of the same rivet, an external elastic ring -37- having been designed which tends to keep the said fingers -36- in closed position, and a collar -39- attached to the casing -12- which encloses the said back ends of the fingers -36-, with a small play.
- the articulation of the fingers -36- of the collet comprises an offset -38- of the said fingers back end, which is supported on an annular element -41- socketed in an annular groove -42- of the casing -12- external surface.
- the means to intercept the duct -34- during the displacement of the casing -12- in order to constitute a penetration stop for the rivet pin -4-, in its access within the said duct comprises a pivot -15- inserted in a drilled hole -8- lateral to the duct -34- which flows at a predetermined distance of the front end of the said duct, the said pivot -15- is retractable thanks to a coaxial spring -16-, which tends to displace it outwardly of the said drilled hole -8-, in such a way that its end does not intercept the duct -34-, means having been designed to displace the said pivot -15-, compressing the said spring - 16-, in a way that its end interferes the duct -34- and acts as insertion limiting stop of the pin -4- in the said duct -34-.
- the method to feed rivets according to above explanation comprises following phases:
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
Claims (10)
- Dispositif pour l'alimentation automatique de rivets à l'avant d'une machine à riveter particulièrement applicable au positionnement de rivets aveugles formés par un corps de rivet ou portion de tête (2), une collerette ou rondelle (3) et une cheville ou tige (4) amovible, dans une machine à riveter telle qu'un pistolet (10) à riveter hydrodynamique, ayant une section de tête comportant un mandrin (17) qui comprent un mécanisme (25) de préhension destiné à conserver la cheville (4) ou tige du rivet en position à son intérieur, et des cylindres hydrodynamiques pour fermer ledit mécanisme de préhension et appliquer un effort de tension afin de déformer la portion (2) de tête du rivet jusqu'à détacher ladite cheville (4) qui est évacuée à travers un conduit (9) axial a ladite section de tête, le dispositif comprenant également des moyens pour l'alimentation individuelle desdits rivets, tels qu'un moyen de transport pneumatique, à une position déterminée d'avance, vers ledit pistolet à riveter,
caractérisé en ce qu'il comprend:a) un bâti comme manchon (12), qui entoure l'extrémité avant du mécanisme de préhension (25) du pistolet à riveter, en agencement coaxial, ledit bâti (12) définissant à son intérieur un évidement (32) et il est terminé à sa section avant par une bague (1) ayant un orifice (33) central qui, sur sa surface interne, a un profilé conique; b) une tubulure (5) sur un côté du bâti (12) définissant un passage pour fournir des rivets à l'intérieur de cet évidement (32), fournis par lesdits moyens de transport à travers un conduit (35), branché à cette tubulure (5).c) une tuyère (13), échangeable, placée en superposition et en alignement avec l'extrémité du conduit (34) central au mécanisme de préhension (25), ladite tuyère ayant un profilé conique orienté vers l'extrémité distale, pourvue de ladite bague (1), du bâti (12);d) des moyens pour déplacer à une distance déterminée en avance ledit bâti, longitudinalement et en télescope par rapport à l'extrémité du mandrin, coaligné avec le conduit (34) central du mécanisme (25) de préhension, pour placer la cheville (4) du rivet, guidée par la tuyère (13) à l'intérieur dudit conduit (34);e) des moyens pour entraver le conduit axial (34) du mécanisme (25) de préhension constituant une butée qui limite l'insertion de la cheville (4) du rivet, déterminant lorsqu'il finit le déplacement dudit bâti (12), un positionnement dudit rivet tel que la collerette (3) de celui-ci dépasse les bagues (1) élastiques et la portion (2) de tête du rivet reste à l'extérieur de l'ensemble prête à être insérée dans un orifice d'une pièce à usiner. - Dispositif selon la revendication 1, caractérisé en ce que ladite tubulure (5) fournissant les rivets, a une orientation inclinée par rapport à l'axe longitudinal de la chambre (32) coalignée avec le conduit (34) du mécanisme de préhension (25) et un tuyau flexible (35) pour alimenter les rivets est branché à cette tubulure (5), la tubulure (5) restant opposée par rapport au manche du pistolet (10) à riveter ou à un élément de support de l'outil à riveter dont il s'agit.
- Dispositif selon la revendication 1, caractérisé en ce que les moyens pour déplacer le bâti (12), en télescope par rapport au mandrin du pistolet à riveter, comprend des cylindres (21) pneumatiques externes soutenus sur un support (22) fixé au corps du pistolet (10) à riveter, et dont les tiges (14), qui sont orientées parallèlement à l'axe du conduit (34), sont branchées par leurs extrémités à travers des appendices (19), au bâti (12).
- Dispositif selon la revendication 1, caractérisé en ce que le mandrin (1), comprend une pluralité de doigts (36) de mandrin en agencement radial autour d'un axe coaxial avec le conduit (34) central, du mécanisme (25) de préhension, articulés par leur extrémité arrière, qui peuvent s'ouvrir en formant une ouverture centrale avant ayant un diamètre légèrement plus large que la rondelle (3) et corps (2) du rivet, ou bien ils peuvent rester fermés en définissant un orifice (33) avant central, approprié pour saisir la cheville (4) du même rivet, un anneau (37) élastique externe ayant été prévu qui essaie de conserver ces doigts (36) en position fermée, et un collier (39) relié au bâti (12) qui enferme lesdites extrémités arrière des doigts (36), avec un peu de jeu.
- Dispositif, selon la revendication 4, caractérisé en ce que l'articulation des doigts (36) du mandrin comprend un déport (38) de ladite extrémité arrière des doigts qui est appuyée sur un élément annulaire (41) emboîté dans une rainure (42) annulaire de la surface externe du bâti (12).
- Dispositif, selon la revendication 1, caractérisé en ce qu'un manchon (24) relie le bâti (12) à l'extrémité avant du corps (10) du pistolet à riveter, en faisant l'office de protection.
- Dispositif, selon la revendication 1, caractérisé en ce que les moyens pour intercepter le conduit (34) durant le déplacement du bâti (12) afin de placer la cheville (4) du rivet à l'intérieur dudit conduit, comprend un pivot (15) inséré dans un orifice (8) percé latéral au conduit (34) qui s'étend à une distance déterminée d'avance de l'extrémité avant dudit conduit, ce pivot (15) étant escamotable grâce à un ressort (16) coaxial, qui tend à le déplacer vers l'extérieur dudit orifice (8) percé, de telle sorte que son extrémité n'entrave pas le conduit (34), des moyens ayant été prévus pour déplacer ce pivot (15), en compressant ce ressort (16), de sorte que son extrémité entrave le conduit (34) y agit comme butée de limitation d'insertion de la cheville (4) dans ledit conduit (34).
- Dispositif, selon la revendication 7, caractérisé en ce que les moyens pour provoquer un déplacement du pivot (15) comprennent un déport ayant une base à profilé régulier finissant par une rampe (31) sur la surface interne du bâti (12), ce déport restant en face, comme une piste coulissante, de l'extrémité externe dudit pivot (15), de sorte que l'interposition de ce pivot dans le conduit (34) a lieu en coordination avec la course linéaire en arrière du bâti (12).
- Dispositif, selon la revendication 7, caractérisé en ce que les moyens pour causer un déplacement du pivot (15) comprennent un jeu de leviers, (26), (27), (28), commandés par un cylindre (29) pneumatique contrôlé par un dispositif électronique séquentiellement programmé, pour actionner, à travers une électrovalve, le cylindre (29) et déplacer le pivot (15) vers une position d'interception du conduit (34), à un moment quelconque, et indépendamment du mouvement du bâti (12).
- Méthode pour l'alimentation automatique de rivets à l'avant d'une machine à riveter caractérisée en ce qu'elle comprend les phases suivantes:a) transport d'un rivet aveugle comprenant une portion de tête ou corps (2) de rivet, une collerette ou rondelle (3) et une tige ou cheville (4) amovible, dans une position déterminée d'avance à l'intérieur de l'évidement (32) d'un bâti (12) comprenant l'extrémité avant d'un mécanisme de préhension (25) d'un outil à riveter;b) déplacement linéaire en télescope, d'une distance déterminée d'avance, dudit bâti (12) coaxialement et s'approchant de l'extrémité dudit mécanisme de préhension (25), pour placer la cheville (4), du rivet à l'intérieur du conduit (34) axial central dudit mécanisme (25);c) obturation du conduit (34) axial du mécanisme de préhension formant une butée à la pénétration de cette tige dans ce conduit, en coordination avec le déplacement du bâti (12) ou indépendamment de celui-ci, à un moment quelconque du cycle, pour obliger les portions (2) et (3) du rivet à dépasser ledit bâti (12) par une extrémité distale, munie de bagues (1) élastiques;d) évacuation de la tige détachée du rivet après avoir riveté, à travers un conduit (34) axial du mécanisme de préhension et un canal (9) axial qui est branché à une zone d'évacuation située éloignée de l'outil à riveter.e) alimentation d'un nouveau rivet qui reste retenu contre la paroi externe avant de l'outil à riveter jusqu'à ce que le bâti (12) revienne à sa position d'alimentation initiale, à la place la plus éloignée par rapport au mécanisme (25) de préhension, un moment dans lequel, lorsqu'un passage à travers la tubulure (5) latérale jusqu'au bâti (12) devient libre, le rivet a accès à l'évidement (32) poussé par l'air comprimé.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9300089 | 1993-01-19 | ||
ES9300089A ES2070707B1 (es) | 1993-01-19 | 1993-01-19 | Dispositivo para carga frontal automatica de remaches a una maquina remachadora y metodo para su puesta en practica. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0607742A1 EP0607742A1 (fr) | 1994-07-27 |
EP0607742B1 true EP0607742B1 (fr) | 1996-07-17 |
Family
ID=8280498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930500174 Revoked EP0607742B1 (fr) | 1993-01-19 | 1993-12-29 | Appareil automatique d'alimentation des rivets pour une riveteuse et procédé pour sa mise en oeuvre |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0607742B1 (fr) |
DE (1) | DE69303701D1 (fr) |
ES (1) | ES2070707B1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110978413B (zh) * | 2019-12-28 | 2021-08-31 | 况仁鹏 | 一种热流道用阀针嘴芯结构及含有该结构的热流道系统 |
JP7393243B2 (ja) | 2020-02-21 | 2023-12-06 | 日東精工株式会社 | ねじ締め機 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2435652A (en) * | 1943-06-11 | 1948-02-10 | Arthur F Koehler | Riveting machine |
JPS5916538B2 (ja) * | 1974-08-30 | 1984-04-16 | ゲジパ プリントニ−トテヒニ−ク ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 盲鋲の自動鋲打方法及び鋲打機 |
US4811881A (en) * | 1987-11-20 | 1989-03-14 | Phillips Plastics Corporation | Apparatus for supplying and installing plastic expansion rivets |
EP0456852B1 (fr) * | 1990-05-15 | 1994-08-10 | VVG Befestigungstechnik Beteiligungs-GmbH | Outil de rivetage avec alimentation de rivets automatique |
-
1993
- 1993-01-19 ES ES9300089A patent/ES2070707B1/es not_active Expired - Lifetime
- 1993-12-29 EP EP19930500174 patent/EP0607742B1/fr not_active Revoked
- 1993-12-29 DE DE69303701T patent/DE69303701D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2070707A2 (es) | 1995-06-01 |
EP0607742A1 (fr) | 1994-07-27 |
DE69303701D1 (de) | 1996-08-22 |
ES2070707R (fr) | 1997-07-01 |
ES2070707B1 (es) | 1998-02-16 |
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