EP2475516B1 - Press comprising a tool-centering device and and method of pre-positioning and fixing a tool on a press platen - Google Patents
Press comprising a tool-centering device and and method of pre-positioning and fixing a tool on a press platen Download PDFInfo
- Publication number
- EP2475516B1 EP2475516B1 EP10752016.5A EP10752016A EP2475516B1 EP 2475516 B1 EP2475516 B1 EP 2475516B1 EP 10752016 A EP10752016 A EP 10752016A EP 2475516 B1 EP2475516 B1 EP 2475516B1
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- tool
- groove
- pin
- platen
- promontory
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- 238000000034 method Methods 0.000 title claims description 13
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004049 embossing Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/028—Loading or unloading of dies, platens or press rams
Definitions
- the technical field of the invention concerns presses intended to produce, by means of tools, various operations on objects to be formed.
- a press consists of a lower plate and an upper plate intended to receive tools, as well as a motorization designed to bring these two plates together, in order to print a particular shape to the object located between the tools.
- the positioning of the tools on the trays holds a primordial place in the success of the forming operation of the object.
- the presses according to the invention therefore have the particularity of involving trays allowing a good positioning of the tools.
- the term "forming" is to be interpreted generally, and may include, for example, embossing or stamping.
- pre-positioning and “pre-centering” are equivalent. Similarly, it is necessary to distinguish the “pre-positioning or pre-centering” pins and the centering pins, which intervene at different stages in the process of fixing the tool on the press plate.
- Presses equipped with a pre-positioning device for a tool on a tray exist and have already been the subject of patents.
- the principle of this device is that an element of the workpiece holder or holder, comprising a centering hole, is mounted with the possibility of elastic displacement, with respect to a fixed centering orifice, of said workpiece carrier or said toolbox.
- the presses according to the invention are provided with a device for pre-positioning a tool on a plate, particularly involving the interaction of at least one peg with at least one groove, said pin and said groove belonging equally to the tool or the plate, and having a locking means for capturing the pin in the groove at a predetermined position, in order to fix the tool in the appropriate position on the tray, without risk of inadvertent deviation, may affect the quality of the forming operation on the object.
- This pre-positioning or pre-centering phase takes place before the actual centering phase, and is made necessary because, on the one hand, of the large mass and volume of the tools to be centered, making their manipulation hazardous, and on the other hand, the precision sought for the location of the tool on the plate.
- This pre-positioning device is therefore accurate, reliable, and reproducible, and its speed of implementation provides a significant time saving in the implementation of tools on the press platens.
- EP 0286553 discloses a press according to the preamble of claim 1 and a method according to the preamble of claim 7.
- the subject of the present invention is a press intended to form an object, comprising a lower plate and an upper plate intended to receive tools, as well as a motorization intended to bring the plates together in order to make the tools interact, between which is placed the object to be treated, said press having a pre-positioning device and a device for centering at least one tool on at least one plate.
- the pre-positioning device involves at least one pin integral with the tool and at least one groove integral with the plate, said pin being inserted into said groove for allow a guide and then a pre-positioning of the tool on the plate, the groove having locking means for freezing the pin in a predetermined position.
- the tools used for a press are heavy and bulky, making their handling difficult and hazardous, especially when it comes to securing them to the trays of said press, in the agreed position.
- these tools are conveyed approximately, above the trays, by means of a crane, and it is therefore essential to facilitate their manual pre-positioning on said trays, by means of simple centering devices, ne requiring neither complicated maneuvers, nor too intense physical efforts.
- the centering device can be ensured, for example, by other pins provided and dimensioned for this purpose, interacting with very specific orifices of the trays. Centering pins and orifices interacting in the framework of the centering device of the tool on the plate; can indifferently belong to the tray or the tool.
- the groove has a flared end, to facilitate the insertion of the pre-centering pin with a certain tolerance.
- the objects are generally suspended from an overhead crane, which routes them, approximately, above the trays, and tend to slightly swing. It is therefore important to simplify their manual pre-positioning, by favoring the entry of the pre-centering pins into the appropriate grooves, at a guide ramp. In this way, the pins can be easily and quickly positioned in the grooves, avoiding the operator to execute an approach phase too precise, always difficult to succeed with heavy tools and bulky
- said end of the grooves is substantially triangular in shape.
- the widest part materializes the opening of the groove, and the narrowest part is extended by said groove. This form is preferred because it can be achieved by means of a customary machining and well mastered.
- the longitudinal axis of the pin is substantially vertical, said pin being secured to the lower part of the tool, and the groove extends in a substantially horizontal direction, to the surface of the lower plate. In this way, the pre-centering or pre-positioning of the tool takes place in a substantially horizontal plane of the plate.
- the locking means involve a promontory at the bottom of the groove, extending in a substantially vertical direction, and against which comes to lean, by means of a prestressed member, a movable stop. Under the effect of pressure, the stop can be momentarily pushed away from the promontory, and when this pressure is removed, the stop has a tendency to come back against the promontory under the effect of the prestressed member.
- the locking means comprise the groove, the promontory and the movable stop.
- the bottom of the grooves materializes the lowest part of the grooves, and the promontory is comparable to a protuberance, which emerges upwards.
- the stop is placed in the groove behind the promontory with respect to the entrance of said groove, and is movable in a direction parallel to the axis of the groove, the pin being intended to push the stop of the promontory, during the pre-positioning phase of the tool on the plate, in order to come jam between said headland and said abutment.
- the pre-centering pin enters the groove at one of its ends.
- the tool is then moved horizontally, so as to advance the pin in the groove, until it exceeds the promontory by pushing the movable stop.
- the stop is lowered so that the pawn comes to wedge between the promontory and the movable stop. In this way, the tool is fixed in the direction of the groove.
- the pins are mounted permanently in the tool, said pins being retractable in said tool, when it is placed on a flat surface.
- the plate has two parallel grooves.
- the grooves are located at the same abscissa relative to the axis of horizontal displacement of the tool, as the pins progress in the grooves.
- the grooves are aligned along an axis perpendicular to their longitudinal axis.
- the grooves are aligned, so that their longitudinal axes are aligned with one another. In this way, relative to the direction of propagation of the pins in the grooves, they are positioned one behind the other.
- the invention also relates to a method of pre-positioning and centering a tool on a press plate according to claim 7.
- the final centering of the tool is performed by means of centering pins integral with the plate and being inserted into specific orifices of the tool.
- the invention is limited neither to a single kind of tool nor to a single tool. It is not more limited by the number of pins and grooves. Two different or identical tools can, for example, be pre-positioned and fixed on the same plate, from a method according to the invention.
- the presses according to the invention have the advantage of being prepared quickly and reliably, thanks to a simple and quick process to implement, pre-centering and centering a tool on a tray. They therefore have the advantage of having a certain modularity, being able to adapt, at the level of their easily interchangeable tools, to different objects to be treated. Finally, this operation of implanting a tool on a press platen, from a pre-positioning and centering method according to the invention, can be performed by a single operator.
- a press 1 comprises a horizontal lower plate 2 and a tool 3 intended to be fixed on said plate 2, in a predetermined position.
- This press also includes, not visible in this figure, a upper tray on which is secured a tool, and a motor for bringing the two plates 2 together, so as to cooperate the two tools 3, in order to print a particular shape to an object, initially affixed to the tool 3
- the lower plate 2 The tool 3 intended to be secured to the lower plate 2 is in the general form of a rectangular parallelepiped, also found in substantially horizontal position.
- This tool 3 is extended horizontally, at its lower part, by two protuberances 4 each traversed by a pin 5 of pre-centering or pre-positioning, vertical, these protuberances 4 each having a horizontal upper face 7 and a lower face horizontal.
- These pins 5 are cylindrical and parallel to each other, and each have an enlarged flat head 6, said pins 5 being positioned on each of the two protuberances 4, so that their enlarged head 6 emerges from the upper face 7 of each of said protuberances 4 into being in contact with said face 7, and so that the pin 5 emerges mainly from the underside of these protuberances 4.
- These pre-centering pins 5 are placed permanently in the protuberances 4, and can be retracted into the tool 3, when it is placed on the floor.
- the side 8 of the tool 3, from which protrude the two protuberances 4, comprises a central notch 9, made in an advance extending parallel to the two protuberances 4, this notch 9 having a U-shaped profile.
- the upper face 10 of the tray bottom 2 comprises a multiplicity of centering pins 11 aligned along one of its axes of symmetry, each centering pin 11 being intended to cooperate with each notch 9 of the tool 3.
- This upper surface 10 also comprises two parallel grooves 12, each having a flared end 13, and intended to interact with the pre-centering pins 5 of the tool 3, these two grooves 12 being disposed on either side of the axis of symmetry, along which are aligned the centering pins 11, the longitudinal axis of each of said grooves 12 being parallel to this axis of symmetry.
- each groove 12 comprises a flared end 13, made to serve as input to the corresponding pre-centering pin 5 of the tool 2, this end 13 preferably having a substantially triangular shape.
- the opening of the groove 12 is embodied by the widest part of the V-shaped end, the narrowest part of this end 13, being extended by a rectilinear portion 14 of constant section, and of limited length.
- groove 12 which is located at the level of flared portion 13, present at its bottom, a promontory 15, extending vertically so as to raise said bottom, the rectilinear portion 14 of the groove 12 being occupied by a movable stop 23 and a fixed stop 16, said fixed stop 16 bearing against the wall of the groove 12, embodying the other end of the groove 12, that is to say that which is opposite to the flared end 13.
- a pre-positioning pin 5 is shown in FIG. good position, without the tool 3 that supports it.
- the arrow 17 represents the direction of movement of the tool 3 during the pre-positioning phase, and shows the beginnings of the interaction between the pre-positioning pin 5 and the corresponding groove 12.
- the promontory 15 of the groove 12 has an inclined face 18 at the groove inlet 12, extending by a flat horizontal face 19 delimiting the highest part of said promontory 15, said flat face 19 extending by a break, materialized by a vertical face 20, situated opposite the inclined face 18, at the rectilinear portion 14 of the groove 12.
- This particular profile of the promontory 15, is intended to promote the entry of the pre-centering pin 5 in the groove 12, then its progression in said groove 12, and finally its locking behind said promontory 15, with no possibility of return in a horizontal direction.
- the rectilinear portion 14 of the groove 12 comprises a movable stop 23 and a fixed abutment 16, bearing both against the bottom of the groove 12 and against an upper cover 22 fixed to the end of the rectilinear portion 14 opposite at the flared end 13 of the groove 12.
- the two stops 16, 23 are mutually pushed against one another by a prestressed spring 24 surrounding an axis 25 parallel to the longitudinal axis of the straight portion 14 of the groove 12, and joining said stops 16,23.
- the maximum distance separating said abutments 16, 23, in the absence of any external stress, is regulated by a recess 26 located on the lower face of the cover 22, each abutment 16, 23 then bearing against two opposite edges of this recess.
- the tool 3 to be fixed on the corresponding plate 2 is moved so that the pre-centering pin 5 can possibly come to scrape the promontory 15 by the flared entry 13 of the groove 12, then advance in the rectilinear portion 14 of the groove 12 following the horizontal upper face 19 of the promontory 15, to finally push the movable stop 23, to come and lock between the vertical wall 20 of the promontory 15 and the movable stop 23 .
- a method of centering and fixing a tool 3 on a platen 2 of press 1 follows the following steps.
- the tool 3 is routed, generally by an overhead crane above the plate 2 on which it must be centered and fixed. This routing often results in a rather approximate positioning of the tool 3 with respect to its precise location of attachment to said plate 2.
- a more precise positioning of the tool 3, by small keys, is then performed manually by a single operator, to align each pre-centering pin 5 on the longitudinal axis of the groove 12 of the plate 2, which corresponds to it, the grooves 12 of said plate 2 being parallel to each other.
- the tool 3 is lowered, as shown by the arrow 28 of the figure 4a , so as to have the emerging end 27 of each pre-centering pin 5 in front of the groove 12 corresponding thereto.
- the tool 3 is then moved manually in a direction parallel to the longitudinal axis of the grooves 12, in order to engage in the flared portions 13 grooves 12 and then block each centering pin 5, between the promontory 15 and the stop 23 of groove 12.
- the tool 3 is lowered again, as indicated by the arrow 30, to come into contact with the plate 2, and insert the centering fixing pins 11 into the housings 9 of FIG.
- the tool 2 provided for this purpose, this bringing into contact causing the partial removal of the centering pins 5 of the protuberances 4 of the tool, which support them, as illustrated by the arrow 31.
- the grooves 12 are parallel to each other on the plate 2, and they can be aligned on the same axis, one behind the other relative to the direction of movement of the tool 2 to insert the centering pins 5 in said grooves 12, be located at the same abscissa with respect to this axis of displacement.
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Description
Le domaine technique de l'invention concerne les presses destinées à réaliser, au moyen d'outils, diverses opérations sur des objets à former. Classiquement, une presse est constituée d'un plateau inférieur et d'un plateau supérieur destinés à recevoir des outils, ainsi que d'une motorisation prévue pour rapprocher ces deux plateaux, afin d'imprimer une forme particulière à l'objet situé entre les outils. Le positionnement des outils sur les plateaux tient une place primordiale dans la réussite de l'opération de formage de l'objet. Plus spécifiquement, les presses selon l'invention ont donc la particularité de faire intervenir des plateaux permettant un bon positionnement des outils. Le terme « formage » est à interpréter de façon générale, et peut recouvrir, par exemple, l'emboutissage ou l'estampage.The technical field of the invention concerns presses intended to produce, by means of tools, various operations on objects to be formed. Conventionally, a press consists of a lower plate and an upper plate intended to receive tools, as well as a motorization designed to bring these two plates together, in order to print a particular shape to the object located between the tools. The positioning of the tools on the trays holds a primordial place in the success of the forming operation of the object. More specifically, the presses according to the invention therefore have the particularity of involving trays allowing a good positioning of the tools. The term "forming" is to be interpreted generally, and may include, for example, embossing or stamping.
Pour bien comprendre l'invention, il faut signaler que les notions de « pré-positionnement » et de « pré-centrage » sont équivalentes. De même, il faut distinguer les pions « de pré-positionnement ou de pré-centrage » et les pions de centrage, qui interviennent à des étapes différentes du processus de fixation de l'outil sur le plateau de presse.To understand the invention, it should be noted that the notions of "pre-positioning" and "pre-centering" are equivalent. Similarly, it is necessary to distinguish the "pre-positioning or pre-centering" pins and the centering pins, which intervene at different stages in the process of fixing the tool on the press plate.
Les presses dotées d'un dispositif de pré-positionnement d'un outil sur un plateau existent et ont déjà fait l'objet de brevets. On peut, par exemple, citer le brevet
Les presses selon l'invention, sont dotées d'un dispositif de pré-positionnement d'un outil sur un plateau, impliquant notamment l'interaction d'au moins un pion avec au moins une rainure, ledit pion et ladite rainure appartenant indifféremment à l'outil ou au plateau, et possédant un moyen de verrouillage permettant de capturer le pion dans la rainure à un endroit bien prédéterminé, afin de figer l'outil dans la position appropriée sur le plateau, sans risque de déviation intempestive, susceptible de nuire à la qualité de l'opération de formage sur l'objet. Cette phase de pré-positionnement ou de pré-centrage intervient avant la phase de centrage proprement dite, et est rendue nécessaire en raison, d'une part, de la masse et du volume importants des outils à centrer, rendant leur manipulation hasardeuse, et, d'autre part, de la précision recherchée pour l'emplacement de l'outil sur le plateau. Ce dispositif de pré-positionnement est donc précis, fiable, et reproductible, et sa rapidité de mise en oeuvre octroie un gain de temps appréciable, dans la mise en place des outils sur les plateaux de presses.The presses according to the invention are provided with a device for pre-positioning a tool on a plate, particularly involving the interaction of at least one peg with at least one groove, said pin and said groove belonging equally to the tool or the plate, and having a locking means for capturing the pin in the groove at a predetermined position, in order to fix the tool in the appropriate position on the tray, without risk of inadvertent deviation, may affect the quality of the forming operation on the object. This pre-positioning or pre-centering phase takes place before the actual centering phase, and is made necessary because, on the one hand, of the large mass and volume of the tools to be centered, making their manipulation hazardous, and on the other hand, the precision sought for the location of the tool on the plate. This pre-positioning device is therefore accurate, reliable, and reproducible, and its speed of implementation provides a significant time saving in the implementation of tools on the press platens.
On connaît de telles presses par
Le document
La présente invention a pour objet une presse destinée à former un objet, comprenant un plateau inférieur et un plateau supérieur destinés à recevoir des outils, ainsi qu'une motorisation prévue pour rapprocher les plateaux afin de faire interagir les outils, entre lesquels est placé l'objet à traiter, ladite presse possédant un dispositif de pré-positionnement et un dispositif de centrage d'au moins un outil sur au moins un plateau. La principale caractéristique technique d'une presse selon l'invention, est que le dispositif de pré-positionnement implique au moins un pion solidaire de l'outil et au moins une rainure solidaire du plateau, ledit pion venant s'insérer dans ladite rainure pour permettre un guidage puis un pré-positionnement de l'outil sur le plateau, la rainure possédant des moyens de verrouillage permettant de figer le pion dans une position prédéterminée. Généralement, les outils servant à une presse sont lourds et volumineux, rendant leur manipulation difficile et hasardeuse, notamment lorsqu'il s'agit de les solidariser aux plateaux de ladite presse, dans la position convenue. Souvent, ces outils sont acheminés de façon approximative, au dessus des plateaux, par l'intermédiaire d'un pont roulant, et il est donc fondamental de faciliter leur pré-positionnement manuel sur lesdits plateaux, au moyen de dispositifs de centrage simples, ne nécessitant ni manoeuvres compliquées, ni efforts physiques trop intenses. Une fois les outils placés dans leur position définitive de travail sur les plateaux, il devient tout aussi essentiel, de les figer temporairement dans ces positions avant de les centrer définitivement, de manière à éviter toute déviation intempestive, aussi minime soit-elle, qui nécessiterait une nouvelle mise en position lourde et pénible, ou qui générerait une fixation finale approximative des outils sur les plateaux, avec des conséquences éventuelles sur la qualité de l'opération de formage à réaliser sur l'objet. Le dispositif de centrage peut être assuré, par exemple, par d'autres pions prévus et dimensionnés à cet effet, interagissant avec des orifices bien spécifiques des plateaux. Les pions de centrage et les orifices interagissant dans le cadre du dispositif de centrage de l'outil sur le plateau; peuvent indifféremment appartenir au plateau ou à l'outil.The subject of the present invention is a press intended to form an object, comprising a lower plate and an upper plate intended to receive tools, as well as a motorization intended to bring the plates together in order to make the tools interact, between which is placed the object to be treated, said press having a pre-positioning device and a device for centering at least one tool on at least one plate. The main technical characteristic of a press according to the invention is that the pre-positioning device involves at least one pin integral with the tool and at least one groove integral with the plate, said pin being inserted into said groove for allow a guide and then a pre-positioning of the tool on the plate, the groove having locking means for freezing the pin in a predetermined position. Generally, the tools used for a press are heavy and bulky, making their handling difficult and hazardous, especially when it comes to securing them to the trays of said press, in the agreed position. Often, these tools are conveyed approximately, above the trays, by means of a crane, and it is therefore essential to facilitate their manual pre-positioning on said trays, by means of simple centering devices, ne requiring neither complicated maneuvers, nor too intense physical efforts. Once the tools are placed in their final working position on the trays, it becomes equally essential, to temporarily freeze them in these positions before definitively centering them, so as to avoid any untimely deviation, however minimal it may be, which would require a new setting in heavy and painful position, or which would generate an approximate final fixing of the tools on the trays, with possible consequences on the quality of the forming operation to be performed on the object. The centering device can be ensured, for example, by other pins provided and dimensioned for this purpose, interacting with very specific orifices of the trays. Centering pins and orifices interacting in the framework of the centering device of the tool on the plate; can indifferently belong to the tray or the tool.
Avantageusement, la rainure possède une extrémité évasée, pour faciliter l'insertion du pion de pré-centrage avec une certaine tolérance. En effet, les objets se retrouvent généralement suspendus à un pont roulant, qui les achemine, de façon approximative, au dessus des plateaux, et ont tendance à légèrement se balancer. Il est donc important de simplifier leur pré-positionnement manuel, en favorisant l'entrée des pions de pré-centrage dans les rainures appropriées, au niveau d'une rampe de guidage. De cette manière, les pions peuvent venir se positionner facilement et rapidement dans les rainures, évitant à l'opérateur d'exécuter une phase d'approche trop précise, toujours difficile à réussir avec des outils lourds et encombrantsAdvantageously, the groove has a flared end, to facilitate the insertion of the pre-centering pin with a certain tolerance. In fact, the objects are generally suspended from an overhead crane, which routes them, approximately, above the trays, and tend to slightly swing. It is therefore important to simplify their manual pre-positioning, by favoring the entry of the pre-centering pins into the appropriate grooves, at a guide ramp. In this way, the pins can be easily and quickly positioned in the grooves, avoiding the operator to execute an approach phase too precise, always difficult to succeed with heavy tools and bulky
Selon un mode de réalisation préféré de l'invention, ladite extrémité des rainures est de forme sensiblement triangulaire. Pour cette configuration, la partie la plus évasée matérialise l'ouverture de la rainure, et la partie la plus étroite est prolongée par ladite rainure. Cette forme est privilégiée, car elle peut être réalisée au moyen d'un usinage usuel et bien maitrisé.According to a preferred embodiment of the invention, said end of the grooves is substantially triangular in shape. For this configuration, the widest part materializes the opening of the groove, and the narrowest part is extended by said groove. This form is preferred because it can be achieved by means of a customary machining and well mastered.
L'axe longitudinal du pion est sensiblement vertical, ledit pion étant solidarisé à la partie inférieure de l'outil, et la rainure s'étend selon une direction sensiblement horizontale, à la surface du plateau inférieur. De cette manière, le pré-centrage ou pré-positionnement de l'outil s'effectue dans un plan sensiblement horizontal du plateau.The longitudinal axis of the pin is substantially vertical, said pin being secured to the lower part of the tool, and the groove extends in a substantially horizontal direction, to the surface of the lower plate. In this way, the pre-centering or pre-positioning of the tool takes place in a substantially horizontal plane of the plate.
Les moyens de verrouillage impliquent un promontoire en fond de rainure, s'étendant selon une direction sensiblement verticale, et contre lequel vient s'appuyer, au moyen d'un organe précontraint, une butée mobile. Sous l'effet d'une pression, la butée peut être repoussée momentanément du promontoire, et, lorsque cette pression est supprimée, la butée a tendance à revenir en appui contre le promontoire sous l'effet de l'organe précontraint. Autrement dit, les moyens de verrouillage, comprennent la rainure, le promontoire et la butée mobile. Le fond des rainures matérialise la partie la plus basse des rainures, et le promontoire est assimilable à une protubérance, qui émerge vers le haut.The locking means involve a promontory at the bottom of the groove, extending in a substantially vertical direction, and against which comes to lean, by means of a prestressed member, a movable stop. Under the effect of pressure, the stop can be momentarily pushed away from the promontory, and when this pressure is removed, the stop has a tendency to come back against the promontory under the effect of the prestressed member. In other words, the locking means comprise the groove, the promontory and the movable stop. The bottom of the grooves materializes the lowest part of the grooves, and the promontory is comparable to a protuberance, which emerges upwards.
De façon avantageuse, la butée est placée dans la rainure derrière le promontoire par rapport à l'entrée de ladite rainure, et est mobile selon une direction parallèle à l'axe de la rainure, le pion étant destiné à repousser la butée du promontoire, lors de la phase de pré-positionnement de l'outil sur le plateau, afin de venir se coincer entre ledit promontoire et ladite butée. Autrement dit, le pion de pré-centrage pénètre dans la rainure par l'une de ses extrémités. L'outil est ensuite déplacé horizontalement, de manière à faire progresser le pion dans la rainure, jusqu'à ce qu'il dépasse le promontoire en repoussant la butée mobile. Une fois la butée suffisamment éloignée du promontoire, l'outil est descendu pour que le pion vienne se coincer entre le promontoire et la butée mobile. De cette manière, l'outil est figé suivant la direction de la rainure.Advantageously, the stop is placed in the groove behind the promontory with respect to the entrance of said groove, and is movable in a direction parallel to the axis of the groove, the pin being intended to push the stop of the promontory, during the pre-positioning phase of the tool on the plate, in order to come jam between said headland and said abutment. In other words, the pre-centering pin enters the groove at one of its ends. The tool is then moved horizontally, so as to advance the pin in the groove, until it exceeds the promontory by pushing the movable stop. Once the stop sufficiently far from the promontory, the tool is lowered so that the pawn comes to wedge between the promontory and the movable stop. In this way, the tool is fixed in the direction of the groove.
Avantageusement, les pions sont montés à demeure dans l'outil, lesdits pions étant escamotables dans ledit outil, lorsque celui-ci est posé sur une surface plane.Advantageously, the pins are mounted permanently in the tool, said pins being retractable in said tool, when it is placed on a flat surface.
De façon préférentielle, pour le pré-positionnement d'un outil, le plateau possède deux rainures parallèles. Selon un premier mode de réalisation préféré de l'invention, les rainures sont situées à la même abscisse par rapport à l'axe de déplacement horizontal de l'outil, lorsque les pions progressent dans les rainures. Autrement dit, les rainures sont alignées suivant un axe perpendiculaire, par rapport à leur axe longitudinal. Selon un deuxième mode de réalisation préféré de l'invention, les rainures sont alignées, de sorte que leurs axes longitudinaux soient alignés l'un sur l'autre. De cette manière, par rapport au sens de propagation des pions dans les rainures, celles-ci sont positionnées l'une derrière l'autre.Preferably, for the pre-positioning of a tool, the plate has two parallel grooves. According to a first preferred embodiment of the invention, the grooves are located at the same abscissa relative to the axis of horizontal displacement of the tool, as the pins progress in the grooves. In other words, the grooves are aligned along an axis perpendicular to their longitudinal axis. According to a second preferred embodiment of the invention, the grooves are aligned, so that their longitudinal axes are aligned with one another. In this way, relative to the direction of propagation of the pins in the grooves, they are positioned one behind the other.
L'invention se rapporte également à un procédé de pré-positionnement et de centrage d'un outil sur un plateau de presse conformément à la revendication 7.The invention also relates to a method of pre-positioning and centering a tool on a press plate according to
Avantageusement, le centrage définitif de l'outil est réalisée aux moyens de pions de centrage solidaires du plateau et venant s'insérer dans des orifices spécifiques de l'outil.Advantageously, the final centering of the tool is performed by means of centering pins integral with the plate and being inserted into specific orifices of the tool.
L'invention n'est limitée, ni à une seule sorte d'outil, ni à un seul outil. Elle n'est pas plus limitée par le nombre de pions et de rainures. Deux outils différents ou identiques peuvent, par exemple, être pré-positionnés et fixés sur un même plateau, à partir d'un procédé selon l'invention.The invention is limited neither to a single kind of tool nor to a single tool. It is not more limited by the number of pins and grooves. Two different or identical tools can, for example, be pre-positioned and fixed on the same plate, from a method according to the invention.
Les presses selon l'invention, présentent l'avantage d'être préparées rapidement et avec fiabilité, grâce à un procédé simple et rapide à mettre en oeuvre, de pré-centrage et de centrage d'un outil sur un plateau. Elles ont donc l'avantage de présenter un certain caractère de modularité, en pouvant s'adapter, au niveau de leurs outils facilement interchangeables, à différents objets à traiter. Enfin, cette opération consistant à implanter un outil sur un plateau de presse, à partir d'un procédé de pré-positionnement et de centrage selon l'invention, peut être réalisée par un seul opérateur.The presses according to the invention have the advantage of being prepared quickly and reliably, thanks to a simple and quick process to implement, pre-centering and centering a tool on a tray. They therefore have the advantage of having a certain modularity, being able to adapt, at the level of their easily interchangeable tools, to different objects to be treated. Finally, this operation of implanting a tool on a press platen, from a pre-positioning and centering method according to the invention, can be performed by a single operator.
On donne ci-après une description détaillée d'un mode de réalisation préféré d'une presse selon l'invention, en se référant aux
- La
figure 1 est une vue partielle d'une presse selon l'invention, montrant un outil destiné à être fixé sur un plateau. - La
figure 2 est une vue zoomée de lafigure 1 , montrant en perspective, un dispositif de pré-positionnement et de verrouillage d'un outil sur un plateau. - La
figure 3 est une vue en coupe d'un dispositif de pré-positionnement et de verrouillage d'un outil sur un plateau. - La
figure 4a est une vue en coupe d'un outil et d'un plateau, et illustre une première étape d'un procédé de pré-positionnement et de centrage selon l'invention, - La
figure 4b est une vue en coupe d'un outil et d'un plateau, et illustre une étape intermédiaire d'un procédé de pré-positionnement et de centrage selon l'invention, - La
figure 4c est une vue en coupe d'un outil et d'un plateau, et illustre une étape finale d'un procédé de pré-positionnement et de centrage selon l'invention,
- The
figure 1 is a partial view of a press according to the invention, showing a tool intended to be fixed on a plate. - The
figure 2 is a zoomed view of thefigure 1 , showing in perspective, a device for pre-positioning and locking a tool on a plate. - The
figure 3 is a sectional view of a device for pre-positioning and locking a tool on a plate. - The
figure 4a is a sectional view of a tool and a plate, and illustrates a first step of a method of pre-positioning and centering according to the invention, - The
figure 4b is a sectional view of a tool and a plate, and illustrates an intermediate step of a method of pre-positioning and centering according to the invention, - The
figure 4c is a sectional view of a tool and a plate, and illustrates a final step of a method of pre-positioning and centering according to the invention,
En se référant à la
En se référant à la
En se référant à la
En se référant aux
Claims (8)
- A press (1) for forming an object, including a bottom platen (2) and a top platen for receiving tools (3), as well as a drive that is provided to bring the platens (2) together so as to cause the tools (3) to interact, between which the object to be processed is placed, the said press (1) having a device for pre-positioning (5, 12) and a device for centering (9, 11) at least one tool (3) on at least one platen (2), the said pre-positioning device involving at least one pre-centering pin (5) integral with the tool (3), and at least one groove (12) integral with the platen (2), the said pin (5) coming to be inserted in the said groove (12) being able to guide then pre-position the tool (3) on the platen (2), the groove (12) extending along a direction substantially horizontal to the surface (10) of the bottom platen (2) and having locking means (15, 23) permitting the pin (5) to be immobilized in a predetermined position, the longitudinal axis of the pin (5) being substantially vertical, the said pin (5) being secured to the lower part (4) of the tool, characterized in that the locking means involve a promontory (15) at the bottom of the groove (12), extending along a substantially vertical direction, and against which a movable stop (23) comes to rest, by means of a prestressed member (24).
- The press according Claim 1, characterized in that the groove (12) has a flared end (13) able to facilitate the insertion of the pin (5) with a tolerance.
- The press according to Claim 2, characterized in that the said end (13) is of substantially triangular shape.
- The press according to Claim 1, characterized in that the stop (23) is placed in the groove (12), behind the promontory with respect to the inlet of the said groove (12), and is movable along a direction parallel to the axis of the groove (12), and in that the pin (5) is intended to push back the stop (23) from the promontory (15), during the phase of pre-positioning of the tool (3) on the platen (2), so as to come to be jammed between the said promontory (15) and the said stop (23).
- The press according to any one of the preceding claims, characterized in that the pin (5) is mounted permanently in the tool (3), the said pin (5) being able to be retracted in the interior of the said tool (3) when this is placed on a flat surface.
- The press according to any one of the preceding claims, characterized in that for the pre-positioning of a tool (3), the platen (2) has two parallel grooves (12).
- A method of pre-positioning and fixing a tool (3) on a platen (2) of a press (1), the tool (3) having at least one substantially vertical pre-positioning pin (5), and the said platen (2) having at least one substantially horizontal groove (12), characterized in that the groove has a flared end (13), and that the tool comprises a promontory (15) disposed on its base and extending along a substantially vertical direction, and a movable stop (23) along a horizontal direction and parallel to the axis of the said groove (12), the said stop (23) coming to rest against the promontory (15) by means of a prestressed member (24), comprising the following steps:- The tool (3) is brought, in an approximate manner, above the platen (2) on which it is to be fixed,- The tool (3) is moved manually along a horizontal direction and parallel to the longitudinal axis of the groove (12),- The tool (3) is lowered, so that a portion (27) of the pin (5) presents itself in front of the flared inlet (13),- The tool (3) is moved horizontally such that the pin (5) moves in the groove (12) until exceeding the promontory (15) and coming to exert a pressure on the movable stop (23),- The stop (23) is pushed back from the promontory (15), and, when the pin (5) has totally exceeded the promontory (15), it comes to be jammed between the said promontory (15) and the said stop (23),- The tool is lowered again to come in contact with the platen, so that the centering pins engage in the housings provided for this purpose.
- The method according to Claim 7, characterized in that the definitive centering of the tool (3) is realized by means of centering pins (11) integral with the platen (2), and coming to be inserted in specific orifices (9) of the tool (3).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0956101A FR2949712B1 (en) | 2009-09-08 | 2009-09-08 | PRESS COMPRISING A DEVICE FOR CENTERING TOOLS |
PCT/FR2010/051484 WO2011030022A1 (en) | 2009-09-08 | 2010-07-15 | Press comprising a tool-centering device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2475516A1 EP2475516A1 (en) | 2012-07-18 |
EP2475516B1 true EP2475516B1 (en) | 2015-01-14 |
Family
ID=42101812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10752016.5A Active EP2475516B1 (en) | 2009-09-08 | 2010-07-15 | Press comprising a tool-centering device and and method of pre-positioning and fixing a tool on a press platen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2475516B1 (en) |
CN (1) | CN102497976B (en) |
FR (1) | FR2949712B1 (en) |
WO (1) | WO2011030022A1 (en) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3908500A (en) * | 1972-12-07 | 1975-09-30 | Dayton Progress Corp | Apparatus for mounting a tool holder or like assembly to a backing structure |
DE3026295A1 (en) * | 1980-07-11 | 1982-02-11 | Schloemann-Siemag AG, 4000 Düsseldorf | HYDRAULIC TOP SADDLE CLAMPING AND TURNING DEVICE ON FORGING PRESSES |
JPS57184525A (en) * | 1981-05-07 | 1982-11-13 | Meiwa Sangyo Kk | Forming mold replacing device for molding device |
DE3637566A1 (en) * | 1986-11-04 | 1988-05-19 | Hilma Gmbh Maschf | Clamping device for top tools with clamping pins which can be secured under the clamping surface of press rams |
FR2612835B1 (en) * | 1987-03-26 | 1989-05-26 | Coutier Andre | CLAMPING DEVICE FOR THE REMOVABLE FIXING OF CONFORMING MOLDS ON THE PLATES OF THE MOLDING PRESSES |
DE3729601C1 (en) * | 1987-09-04 | 1988-10-27 | Erowa Ag | Device for clamping a workpiece or tool |
SE9101563D0 (en) * | 1991-05-21 | 1991-05-21 | Sonnie Hermansson | MEDICAL CONTROL FOR TOOL |
JP3608186B2 (en) * | 1997-11-19 | 2005-01-05 | ダイハツ工業株式会社 | Heavy workpiece alignment mounting device |
CN2871184Y (en) * | 2005-12-22 | 2007-02-21 | 佛山市顺德区汉达精密电子科技有限公司 | Fast mould-constructing positioner for large mould |
KR20080002293U (en) * | 2006-12-27 | 2008-07-02 | 한국 고덴시 주식회사 | Sliding change type forming press using the rail |
CN101396879B (en) * | 2008-11-05 | 2011-10-26 | 合肥合锻机床股份有限公司 | Stop positioning device of moveable platform of hydraulic press |
-
2009
- 2009-09-08 FR FR0956101A patent/FR2949712B1/en not_active Expired - Fee Related
-
2010
- 2010-07-15 EP EP10752016.5A patent/EP2475516B1/en active Active
- 2010-07-15 CN CN201080040142.0A patent/CN102497976B/en active Active
- 2010-07-15 WO PCT/FR2010/051484 patent/WO2011030022A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP2475516A1 (en) | 2012-07-18 |
CN102497976A (en) | 2012-06-13 |
FR2949712A1 (en) | 2011-03-11 |
WO2011030022A1 (en) | 2011-03-17 |
CN102497976B (en) | 2014-07-30 |
FR2949712B1 (en) | 2014-02-28 |
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