EP2943298B1 - Positioning of cutting blades on a press frame - Google Patents

Positioning of cutting blades on a press frame Download PDF

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Publication number
EP2943298B1
EP2943298B1 EP13827013.7A EP13827013A EP2943298B1 EP 2943298 B1 EP2943298 B1 EP 2943298B1 EP 13827013 A EP13827013 A EP 13827013A EP 2943298 B1 EP2943298 B1 EP 2943298B1
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European Patent Office
Prior art keywords
blade
positioning
cutting
face
frame
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EP13827013.7A
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German (de)
French (fr)
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EP2943298A1 (en
Inventor
Laurent ODIC
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PSA Automobiles SA
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Peugeot Citroen Automobiles SA
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Publication of EP2943298A1 publication Critical patent/EP2943298A1/en
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    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools

Definitions

  • the present invention relates to a method of assembling a press tool according to the preamble of claim 1 and to a press tool according to the preamble of claim 10. It relates to the general field of press cutting tools intended for shearing of sheet metal, and more particularly to the shaping of body parts intended in particular for motor vehicles.
  • press cutting tools generally comprise a first frame and a second frame intended to be mounted movable relative to each other, each frame carrying a cutting blade of a shape substantially conjugate to that the other frame, such that the approximation of said frames causes the overlap of the blades and the shearing of a blank placed between said frames.
  • a tool is notably described in FR 2 989 605 .
  • the feasibility and the quality of the cutting require a particularly precise positioning of the blades, which is generally obtained for each blade, by using two ground pins, which are each engaged on the one hand in a pre-drilled fitted bore in the blade, and secondly in a corresponding adjusted bore pre-drilled in the frame.
  • Such a touch-up operation which is long and delicate with regard to the required machining and assembly tolerances, can even be made impossible because of the particular shape of the cutting profile, for example when the blades have a serrated profile, which has corrugations to limit the consumption of material during cutting of the blank.
  • the only solution consists in a complete repair of the centering pin, which requires extracting the concerned blade (s) from the frame, then performing a machining restart in order to widen the bores of the blade and of the frame to adapt them to a diameter of upper centering pin (for example so as to go from a diameter 12H7 to a diameter 16H7), the centering of said bores being of course slightly modified depending on the position correction to be made.
  • the objects assigned to the invention therefore aim at overcoming the aforementioned drawbacks and at proposing a new method of producing press tools that reconciles the ability and simplicity of adjustment of the blades with precision, reliability and durability of the positioning of said blades, and this in order to guarantee the performance and longevity of said tooling.
  • Objects assigned to the invention are achieved by means of a method of assembling a shear press tool, said tool comprising a frame having a receiving surface for substantially shearing, and arranged to accommodate a succession of cutting blades intended to materialize the consecutive sections of a predetermined shear pattern, said blades being each delimited by a base face arranged to bear against the receiving surface, by a front end face who is stands with respect to said base face so that shearing can take place along said front face, by a dorsal face forming a heel opposite said front face of cut, as well as by a first lateral face and a second opposite lateral face, which each connect the front face to the dorsal face, said method being characterized in that it comprises a step (a) of initialization during which a first blade of cutting, including a free lateral junction face forms, projecting from the receiving surface, a first positioning stop, a step (b) constituting an anti-recoil guide, during which is fixed to the frame , at a distance from the
  • the method according to the invention makes it possible to separate the operations of pre-positioning and adjustment on the one hand, during which the Cartesian position is adjusted (on the abscissa and / or on the ordinate, in a plane substantially normal to the shear direction, which preferably corresponds to the receiving surface) and / or yaw orientation (in azimuth around the shear direction) of the second blade, clamping operations on the other hand, in which permanently fixes said second blade in the retained and proven spatial configuration.
  • the method according to the invention makes it possible to pre-position the second blade isostatically supported on the one hand on the receiving surface, and secondly, and above all, on three distinct points, materialized protruding from said receiving surface by the positioning stops.
  • the arrangement according to the invention makes it possible to place sliding tangential support, advantageously by an approach movement comprising at least one lateral component transverse to the shear direction, and substantially parallel to the receiving surface, respectively a side face (slice) of the second blade against the corresponding side face of the first blade, and the heel of the second blade against the second and third abutment, rather than impose hyperstatic threading standardized bores on pawns of centering according to a normal approach to the receiving surface.
  • the isostatic pressing on three reference points, arranged in a triangle so as to match the outer contours of the second blade makes it possible to adjust freely and easily, in a fine but deterministic manner, the spatial configuration of said second blade by relative to the first blade, by simply acting on at least one of the supports, and more particularly on one of the bearing points of the heel against the second stop or against the third stop.
  • any modification of a heel support is automatically accommodated by the two remaining supports, simply by sliding and / or tilting of the second blade, and more particularly of its heel and its lateral face, against the other two corresponding stops .
  • the configuration of the second blade in the pre-positioning phase is therefore easily adaptable, simply by retouching one and / or the other of the heel / stop contacts, and more particularly without the need to perform any recovery. machining on the positioning stops themselves, on the frame, on the cutting profile of the blades, or even on the edges of said blades intended to be contiguous.
  • this blocking in a configuration intended to remain invariant no longer needs to be modified a posteriori.
  • the present invention relates to a method of assembling a press tool shear 1.
  • said tooling 1 comprises at least one frame 2, 102, and more particularly a first frame 2 and a second frame 102 which are intended to be mounted movable with respect to each other, and preferably respectively fixed to the deck ( lower) and the movable (upper) apron of a shearing press (not shown), so as to be alternately spaced, to allow the insertion between them of a blank 3 to be cut, and then close together one of the other according to a shearing movement M C , here in vertical translation on the figure 4 , so as to cause the shearing of said blank 3.
  • a shearing movement M C here in vertical translation on the figure 4
  • the blank 3 will preferably be formed by a piece of sheet metal, in particular steel or aluminum, which may for example have a thickness of the order of 0.5 mm to 2 mm.
  • each frame 2, 102 has a receiving surface 4, 104 which is intended to be positioned substantially normally to the shearing movement M C , and which is arranged to accommodate a succession of cutting blades 5, 6, 7 (respectively 105, 106, 107 for the corresponding blades of the second frame 102) intended to materialize the consecutive sections of a predetermined shear pattern.
  • said blades 5, 6, 7, 105, 106, 107 are each delimited by a base face 6B, 106B arranged to bear against the receiving surface 4, by a front end face 5C, 6C, 7C, 106C which is raised with respect to said base face 6B, 106B so that the shear can occur along said front face, by a dorsal face 5T, 6T, 7T, 106T forming a heel opposite said face cutting face 5C, 6C, 7C, 106C, as well as a first lateral face 5D, 6D, 7D and a second lateral face 5G, 6G, 7G opposite, each of which connects the front face 5C, 6C, 7C to the dorsal face 5T, 6T, 7T.
  • the method uses blades 5, 6, 7 whose respective cutting faces 5C, 6C, 7C each form in length a plurality of successive teeth 8 which follow a corrugated profile, for example substantially sinusoidal.
  • Such a serrated arrangement advantageously increases the effectiveness of the shear, by allowing a saving of material during the cutting of the blank 3.
  • the tooling 1, and more particularly the frame 2 concerned will be assigned a direct orthonormal reference (X, Y, Z) whose vertical axis Z carries the shearing movement M C , of which the horizontal X axis corresponds substantially to the frontal / dorsal direction which goes from the heel 5T, 6T, 7T to the corresponding cutting face 5C, 6C, 7C, and according to which the lateral faces 5G, 5D, 6G, 6D, 7G, 7D preferably extend, and whose axis Y horizontal corresponds substantially to the depth according to which the blades 5, 6, 7 of the same frame 2, and more precisely the contiguous blades 5, 6, 7 delimiting the same continuous shear pattern, follow one another longitudinally.
  • X, Y, Z direct orthonormal reference
  • the receiving surface 4 will preferably be flat, and may then correspond to the plane (X, Y) normal to the Z direction of the shearing motion. It will preferably the same for the bearing surfaces 6B, 106B of the blades.
  • Said reception surface 4 will moreover preferably be common to the various blades 5, 6, 7, and may possibly, as illustrated on FIG. figure 4 , corresponding to the platform of a sole, raised above the bottom of the frame 2.
  • the method comprises a step (a) of initialization during which is reported on the receiving surface 4 a first cutting blade 5, a free 5G side junction face form, protruding from the reception surface 4, a first positioning stop 11, a step (b) of constituting an anti-recoil guide, during which it is fixed to the frame 2, at a distance from the location of the first positioning stop 11, at least one second positioning stop 12 and a third positioning stop 13 spaced apart from each other, which protrude from the receiving surface 4, then a step (c) of linear stacking during of which a second cutting blade 6 is attached to the receiving surface 4, next to the first blade 5, simultaneously resting on the one hand the heel 6T of said second blade 6 against the second and the third positioning abutment 12 , 13, in order to bo the recoil T X of the second blade 6 vis-à-vis the cutting zone 10 while allowing a longitudinal displacement T Y adjustment of said second blade, and secondly one of the lateral faces of said second blade against the first positioning stop 11, which thus hinders the
  • the assembly formed by the three positioning stops 11, 12, 13 not aligned forms a kind of cradle triangular allowing engagement and isostatic pressing of the second blade 6, and more particularly of two of its secant free edges, in this case its heel 6T and one of its side faces 6D (the right edge on the figure 2 ), by effective shoulder against each of said positioning stops 11, 12, 13.
  • the isostatic base provided by the positioning stops 11, 12, 13 advantageously offers a deterministic and stable positioning of the second blade 6 with respect to the first blade 5, by providing a guide which limits the recoil T X of the second blade 6 in a direction carried by a first direction X (but in fact allows the advance in the opposite direction), and secondly the longitudinal displacement T Y of said second blade in a direction carried by a second y secant direction and preferably perpendicular to the first direction X, without mechanically constraining the arrangement of the second blade 6 by a tight fitting immediately.
  • the second blade 6 can therefore keep in absolute, during the linear stacking step (c), certain degrees of freedom allowed by the plane-to-plane connection corresponding to the support of its base face. 6B against the receiving surface 4, and more particularly the degrees of freedom in translation along X and Y, and in yaw rotation around Z, which allows to freely adjust the Cartesian configuration (translational position) and azimuth (yaw rotation) of said blade.
  • the second and the third positioning stop 12, 13 offering in this respect a guided sliding (T Y ) at the heel 6T when the latter bears tangentially against said stops 12, 13, it is possible to lean against the open heel 6T of the second blade 6 against one and / or the other, said second and third stops 12, 13, and preferably simultaneously against both, to then slide the second blade 6, in contact with the surface receiving 4 and the ramp materialized by said second and third abutment 12, 13, until the side face 6D comes, by lateral approach along a substantially transverse path to the Z direction, in contact with the first stop 11 , i.e., the corresponding lateral face 5G of the first blade 5.
  • the second blade 6 finally settles tangentially, deterministically, in the isostatic cradle formed by all three positioning stops 11, 12, 13, bearing against two stops 12, 13 not opposing the bearing against the third stop 11.
  • the portions of the heel 6T intended to come into contact respectively with the second and the third positioning abutment 12, 13 are substantially flat and parallel, and preferably coplanar.
  • the different portions of the heel 6T will thus be able to form a plane sliding front, of the ramp type, for stably and effectively guiding the longitudinal translation T Y of the second blade 6.
  • the heel 6T may advantageously form a flat dorsal face which extends continuously in one piece at least on the portion between the second and the third abutment 12, 13.
  • Said dorsal face 6T will preferably be generated on the one hand by a component Z normal to the receiving surface 4 and to the base face 6B, and on the other hand by a rectilinear segment intended to be applied tangentially against the second stop 12 and against the third stop 13.
  • the second positioning stop 12 and the third positioning stop 13 are made by means of a first locking pin and a second locking pin respectively.
  • a second locking pin, both cylindrical circular base which is each introduced into a bore 14, 15 of corresponding diameter pierced in the frame 2, from the receiving surface 4, as shown in particular on the Figures 2, 3 and 4 .
  • Said stop pins are preferably made of a metallic material, and preferably treated, for example nitrided, for to improve their hardness and rigidity, and consequently the precision of the adjustment for which they each offer a reference surface.
  • the method according to the invention preferably comprises a step (d) of verification during which it is verified, for example by a shear test of a sheet of paper press debugging, compliance of the configuration of the blades 5, 6 present on the frame 2, then, depending on whether the verification is negative or, on the contrary, positive, a step (e) of correction, during which the thickness of the contact between the heel 6T of the second blade 6 and one and / or the other of the second and third positioning stops 12, 13, in order to adjust the Cartesian position and / or the yaw azimuthal orientation of the second blade 6 by relative to the first blade 5, a final fixing step (f), during which the second blade 6 is secured to the frame 2 in the verified configuration.
  • a step (d) of verification during which it is verified, for example by a shear test of a sheet of paper press debugging, compliance of the configuration of the blades 5, 6 present on the frame 2, then, depending on whether the verification is negative or, on the contrary, positive, a step (e) of correction, during which
  • the bidirectional plane adjustment capacity offered by the assembly according to the invention makes it possible to adjust the assembly clearance of the blades 5, 6 in two intersecting X, Y directions, and more particularly substantially perpendicular, without requiring complex retouching. , and in particular without requiring the machining of the frame 2, the cutting profile of the blades or the lateral faces 5G, 6D of junction of said blades.
  • the shearing clearance J C (in X on the figure 4 ), which corresponds to the width of the gap formed between the cutting faces 6C, 106C of the blades 6, 106 respectively associated with the first frame 2 and the second frame 102 to allow the generation of an effective shear stress.
  • this shearing game J C may be between 0.03 mm and 0.05 mm.
  • the correction step (e) may comprise a sub-step (e1) of wedging during which an additional spacer 16 of thickness chosen is interposed between at least one of the second and third positioning stops 12, 13 and the corresponding portion (s) of the heel 6T of the second blade 6 (as shown in dashed line on the figure 3 ).
  • one or more strips of strip preferably of metal, of calibrated thickness which may be between 0.02 mm and 0.2 mm.
  • the invention thus makes it possible to very finely adjust the advance and / or tilting of the blade 6 towards the cutting zone 10, by a very versatile and reversible process, which can adapt to a large variety of configurations.
  • the step (e) of correction may comprise a sub-step (e2) retouching during which one removes material heel 6T of the second blade 6, at one and / or the other of its contact zones with respectively the first and the second positioning stop 12, 13.
  • the digging of the heel 6T may for example be done by grinding.
  • the final fixing step (f) comprises a sub-step (f1) of counterpitching, during which the frame 2 is counterplaced through the second blade 6 placed and clamped in the verified configuration, so as to form at least one, and preferably two, centering wells 17, 18, then a sub-step (f2) pinning during which is introduced into the centering wells or 17, 18 pins 20, 21 of corresponding diameter , in order to immobilize the second blade 6 relative to the frame 2 in the retained configuration.
  • a sub-step (f1) of counterpitching during which the frame 2 is counterplaced through the second blade 6 placed and clamped in the verified configuration, so as to form at least one, and preferably two, centering wells 17, 18, then a sub-step (f2) pinning during which is introduced into the centering wells or 17, 18 pins 20, 21 of corresponding diameter , in order to immobilize the second blade 6 relative to the frame 2 in the retained configuration.
  • the implementation of a counterpunching, according to which the frame 2 is drilled from the receiving surface 4 and through the thickness of the blade 6 to be immobilized makes it possible to dispose, simply and reliably, of a single reference system, and a perfectly coinciding spacing between, on the one hand, the immobilization bores pierced in the thickness of the blade 6 and corresponding to the upper sections of the centering wells 17, 18, and on the other hand the homologous bores corresponding to the lower sections pierced in the frame 2.
  • centering elements (wells and pins) being defined empirically from the blade 6 to be fixed after adjustment thereof, and no longer arbitrarily and theoretically from the frame 2, they will be implemented once. for all, without the need for a later recovery.
  • the corresponding pins 20, 21 may for example have a finish type g6, h6 or k6, depending on the degree of accuracy or desired tightening.
  • step (a) of initialization is positioned and is fixed from the outset the first blade 5 in a predetermined single configuration that corresponds to its final configuration.
  • the maintenance of the first blade 5 in its unique and invariant spatial configuration can be achieved by pinning 20 ", 21" in centering wells, with adjustment in precise guiding, adjusted or tightened, in a manner similar to that which has been described. higher in relation to the second blade (but without stopping pins this time).
  • the method can be repeated in a similar manner for each of the blades 5, 6, 7 laid successively in the extension of one another, the third blade 7 coming for example to bear on the one hand on the side face 6G of the second blade located opposite the first blade 5, and secondly on a second set of anti-recoil stops 12 ', 13'.
  • the final fixing of the third blade 7 can again be performed by pinning 20 ', 21' in guide wells, as described above.
  • each new blade may be first pre-positioned, then its configuration checked and if necessary corrected, before the blade is permanently immobilized and that one then passes only to the next blade, for which the blade thus fixed will serve as a reference.
  • each blade it will be possible within each blade one, or preferably at least two, fasteners 22, allowing for example screwing through holes lamés.
  • the present invention also relates to a tool 1 shear press as such, which will have been arranged according to the method described above.
  • the invention therefore relates to a shear press tooling 1 comprising a frame 2 on which are fixed longitudinally in a row a first cutting blade 5 and a second cutting blade 6, said tool comprising positioning means definitive 20, 21, 20 ', 21', 20 “, 21” comprising at least a first fixing pin 20, 20 ', 20 “and a second securing pin 21, 21', 21", cylindrical circular base, said fixing pins being each respectively embedded in a first centering well 17 and a second centering well 18, each formed by a first bore drilled in the body of the second blade 6 and a second bore coaxial with the first bore and pierced in the frame 2, and secondly pre-positioning means, distinct from said fixing pins 20, 21, said pre-positioning means comprising a first positioning stop 11, formed by one of the 5G side aces of the first blade 5 which provides a longitudinal support to one of the side faces 6D of the second cutting blade, and a second positioning stop 12 and a third positioning stop 13 formed by a first and a second locking pin,
  • the pre-positioning means and more particularly the stops 11, 12, 13 are arranged such that, in the absence of the final pinning 20, 21 (in this case, before the implementation of said final pinning), they allow a free docking of the second blade 6, and more particularly of its solid upper dorsal 6T and lateral 6D side walls, against said stops 11, 12, 13, in a substantially transverse trajectory to the normal Z at the receiving surface 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

La présente invention concerne un procédé d'assemblage d'un outillage de presse selon le préambule de la revendication 1 et un outillage de presse selon le préambule de la revendication 10. Elle se rapporte au domaine général des outils de découpe sous presse destinés au cisaillement de tôles, et plus particulièrement au façonnage de pièces de carrosserie destinées notamment aux véhicules automobiles.The present invention relates to a method of assembling a press tool according to the preamble of claim 1 and to a press tool according to the preamble of claim 10. It relates to the general field of press cutting tools intended for shearing of sheet metal, and more particularly to the shaping of body parts intended in particular for motor vehicles.

De manière bien connue en soi, les outils de découpe sous presse comprennent généralement un premier bâti et un second bâti destinés à être montés mobiles l'un par rapport à l'autre, chaque bâti embarquant une lame de découpe de forme sensiblement conjuguée à celle de l'autre bâti, de telle sorte que le rapprochement desdits bâtis provoque le chevauchement des lames et le cisaillement d'un flan placé entre lesdits bâtis. Un tel outil est notamment décrit dans FR 2 989 605 .In a manner well known per se, press cutting tools generally comprise a first frame and a second frame intended to be mounted movable relative to each other, each frame carrying a cutting blade of a shape substantially conjugate to that the other frame, such that the approximation of said frames causes the overlap of the blades and the shearing of a blank placed between said frames. Such a tool is notably described in FR 2 989 605 .

A ce titre, eu égard à d'évidentes contraintes de fabrication de l'outillage, il est également connu de juxtaposer, sur un même bâti, plusieurs lames de découpe, initialement distinctes, qui matérialisent, par tronçons successifs, le tracé de cisaillement souhaité, quelles que soient la longueur, parfois importante, et la forme, parfois complexe, dudit tracé.In this respect, in view of obvious manufacturing constraints of the tooling, it is also known to juxtapose, on the same frame, several cutting blades, initially distinct, which materialize, in successive sections, the desired shear pattern regardless of the length, sometimes important, and the sometimes complex shape of the line.

La faisabilité et la qualité de la découpe exigent un positionnement particulièrement précis des lames, qui est généralement obtenu, pour chaque lame, en utilisant deux goupilles de centrage rectifiées, que l'on engage chacune d'une part dans un alésage ajusté pré-percé dans la lame, et d'autre part dans un alésage ajusté correspondant pré-percé dans le bâti.The feasibility and the quality of the cutting require a particularly precise positioning of the blades, which is generally obtained for each blade, by using two ground pins, which are each engaged on the one hand in a pre-drilled fitted bore in the blade, and secondly in a corresponding adjusted bore pre-drilled in the frame.

Bien qu'il donne généralement satisfaction en matière de précision de positionnement, un tel assemblage a pour principal inconvénient d'affecter d'emblée une position unique à chaque lame.Although it generally gives satisfaction with positioning accuracy, such an assembly has the main disadvantage of immediately assigning a single position to each blade.

Or, il peut se révéler nécessaire, lors d'essais de mise au point, de corriger la position de l'une ou l'autre des lames, notamment pour respecter le jeu de cisaillement qui doit séparer, le long du tracé de cisaillement, la face de coupe des lames du premier bâti de la face des coupes des lames correspondantes du second bâti.However, it may be necessary, during development tests, to correct the position of one or other of the blades, in particular to respect the shearing clearance that must separate along the shear path, the cutting face of the blades of the first frame of the face of the cuts of corresponding blades of the second frame.

Dans certains cas, on peut envisager de prévoir une surépaisseur de matière sur la face de coupe des lames, de sorte à pouvoir retoucher leur profil par usinage.In some cases, it is conceivable to provide an extra thickness of material on the cutting face of the blades, so as to retouch their profile by machining.

Une telle opération de retouche, au demeurant longue et délicate au regard des tolérances d'usinage et d'assemblage requises, peut même être rendue impossible en raison de la forme particulière du profil de coupe, par exemple lorsque les lames présentent un profil dentelé, qui présente des ondulations permettant de limiter la consommation de matière lors de la découpe du flan.Such a touch-up operation, which is long and delicate with regard to the required machining and assembly tolerances, can even be made impossible because of the particular shape of the cutting profile, for example when the blades have a serrated profile, which has corrugations to limit the consumption of material during cutting of the blank.

En pareil cas, la seule solution consiste en une réfection complète du goupillage de centrage, ce qui nécessite d'extraire la ou les lames concernées du bâti, puis d'effectuer une reprise d'usinage afin d'élargir les alésages de la lame et du bâti pour les adapter à un diamètre de goupille de centrage supérieur (par exemple de sorte à passer d'un diamètre 12H7 à un diamètre 16H7), le centrage desdits alésages étant bien entendu légèrement modifié en fonction de la correction de position à apporter.In such a case, the only solution consists in a complete repair of the centering pin, which requires extracting the concerned blade (s) from the frame, then performing a machining restart in order to widen the bores of the blade and of the frame to adapt them to a diameter of upper centering pin (for example so as to go from a diameter 12H7 to a diameter 16H7), the centering of said bores being of course slightly modified depending on the position correction to be made.

Une telle intervention est cependant particulièrement lourde, longue et coûteuse à mettre en oeuvre.Such an intervention is however particularly heavy, long and expensive to implement.

En outre, une telle méthode n'autorise qu'un nombre de retouches très limité, et présente de surcroît une précision d'ajustement parfois difficilement maîtrisable, la multiplication des reports de cotes et des changement de référentiels liés aux opérations de démontage, usinage et remontage représentant autant de sources d'erreurs par rapport aux tolérances souhaitées.In addition, such a method allows only a very limited number of retouching, and moreover has an adjustment accuracy sometimes difficult to control, the multiplication of size reports and changes of standards related to disassembly operations, machining and reassembly representing as many sources of errors compared to the desired tolerances.

Enfin, dans la mesure où de telles retouches affectent l'outillage de manière irréversible, elles augmentent le risque de provoquer un dommage irréparable conduisant à la mise au rebut dudit outillage.Finally, insofar as such retouching affects the tooling irreversibly, it increases the risk of causing irreparable damage leading to the scrapping of said tooling.

Les objets assignés à l'invention visent par conséquent à remédier aux inconvénients susmentionnés et à proposer un nouveau procédé de réalisation d'outillage de presse qui concilie capacité et simplicité d'ajustement des lames avec précision, fiabilité et durabilité du positionnement desdites lames, et ce de manière à garantir les performances et la longévité dudit outillage.The objects assigned to the invention therefore aim at overcoming the aforementioned drawbacks and at proposing a new method of producing press tools that reconciles the ability and simplicity of adjustment of the blades with precision, reliability and durability of the positioning of said blades, and this in order to guarantee the performance and longevity of said tooling.

Les objets assignés à l'invention sont atteints au moyen d'un procédé d'assemblage d'un outillage de presse à cisailler, ledit outillage comprenant un bâti qui présente une surface de réception destinée à être placée sensiblement normalement au mouvement de cisaillement, et agencée pour accueillir une succession de lames de découpe destinées à matérialiser les tronçons consécutifs d'un tracé de cisaillement prédéterminé, lesdites lames étant délimitées chacune par une face de base agencée pour venir en appui contre la surface de réception, par une face frontale de coupe qui se dresse par rapport à ladite face de base de telle sorte que le cisaillement puisse s'opérer le long de ladite face frontale, par une face dorsale formant talon à l'opposé de ladite face frontale de coupe, ainsi que par une première face latérale et une seconde face latérale opposées, qui relient chacune la face frontale à la face dorsale, ledit procédé étant caractérisé en ce qu'il comporte une étape (a) d'initialisation au cours de laquelle on rapporte sur la surface de réception une première lame de découpe, dont une face de jonction latérale libre forme, en saillie par rapport à la surface de réception, une première butée de positionnement, une étape (b) de constitution d'un guidage anti-recul, au cours de laquelle on fixe au bâti, à distance de l'emplacement de la première butée de positionnement, au moins une seconde butée de positionnement et une troisième butée de positionnement distantes l'une de l'autre, qui font saillie par rapport à la surface de réception, puis une étape (c) d'empilement linéaire au cours de laquelle on rapporte une seconde lame de découpe sur la surface de réception, à côté de la première lame, en adossant simultanément d'une part le talon de ladite seconde lame contre la seconde et la troisième butée de positionnement, afin de borner le recul de la seconde lame vis-à-vis de la zone de coupe tout en autorisant un déplacement longitudinal d'ajustement de ladite seconde lame, et d'autre part l'une des faces latérales de ladite seconde lame contre la première butée de positionnement, qui fait ainsi obstacle au déplacement longitudinal de la seconde lame, et ce de telle sorte que la face frontale de coupe de la seconde lame vient se placer sensiblement dans la continuité de la face de coupe de la première lame.Objects assigned to the invention are achieved by means of a method of assembling a shear press tool, said tool comprising a frame having a receiving surface for substantially shearing, and arranged to accommodate a succession of cutting blades intended to materialize the consecutive sections of a predetermined shear pattern, said blades being each delimited by a base face arranged to bear against the receiving surface, by a front end face who is stands with respect to said base face so that shearing can take place along said front face, by a dorsal face forming a heel opposite said front face of cut, as well as by a first lateral face and a second opposite lateral face, which each connect the front face to the dorsal face, said method being characterized in that it comprises a step (a) of initialization during which a first blade of cutting, including a free lateral junction face forms, projecting from the receiving surface, a first positioning stop, a step (b) constituting an anti-recoil guide, during which is fixed to the frame , at a distance from the location of the first positioning stop, at least one second positioning stop and a third positioning stop spaced from each other, which protrude from the surface receiving, then a step (c) of linear stacking during which a second cutting blade is reported on the receiving surface, next to the first blade, while simultaneously resting on the one hand the heel of said second blade against the second and the third positioning stop, in order to limit the recoil of the second blade with respect to the cutting zone while permitting a longitudinal displacement of adjustment of said second blade, and secondly the one of the lateral faces of said second blade against the first positioning stop, which thus hinders the longitudinal displacement of the second blade, and this so that the front face of the second blade cutting edge is placed substantially in the continuity of the cutting face of the first blade.

Avantageusement, le procédé conforme à l'invention permet de séparer les opérations de pré-positionnement et de réglage d'une part, au cours desquelles on ajuste la position cartésienne (en abscisse et/ou en ordonnées, dans un plan sensiblement normal à la direction de cisaillement, qui correspond de préférence à la surface de réception) et/ou l'orientation en lacet (en azimut autour de la direction de cisaillement) de la seconde lame, des opérations de bridage d'autre part, au cours desquelles on fixe définitivement ladite seconde lame dans la configuration spatiale retenue et éprouvée.Advantageously, the method according to the invention makes it possible to separate the operations of pre-positioning and adjustment on the one hand, during which the Cartesian position is adjusted (on the abscissa and / or on the ordinate, in a plane substantially normal to the shear direction, which preferably corresponds to the receiving surface) and / or yaw orientation (in azimuth around the shear direction) of the second blade, clamping operations on the other hand, in which permanently fixes said second blade in the retained and proven spatial configuration.

En effet, le procédé conforme à l'invention permet de venir pré-positionner la seconde lame en appui isostatique d'une part sur la surface de réception, et d'autre part, et surtout, sur trois points distincts, matérialisés en saillie de ladite surface de réception par les butées de positionnement.Indeed, the method according to the invention makes it possible to pre-position the second blade isostatically supported on the one hand on the receiving surface, and secondly, and above all, on three distinct points, materialized protruding from said receiving surface by the positioning stops.

Plus particulièrement, l'agencement conforme à l'invention permet de placer en appui tangentiel glissant, avantageusement par un mouvement d'approche comprenant au moins une composante latérale transverse à la direction de cisaillement, et sensiblement parallèle à la surface de réception, respectivement une face latérale (tranche) de la seconde lame contre la face latérale correspondante de la première lame, et le talon de la seconde lame contre la seconde et la troisième butée, plutôt que d'imposer un enfilage hyperstatique d'alésages normalisés sur des pions de centrage selon une approche normale à la surface de réception.More particularly, the arrangement according to the invention makes it possible to place sliding tangential support, advantageously by an approach movement comprising at least one lateral component transverse to the shear direction, and substantially parallel to the receiving surface, respectively a side face (slice) of the second blade against the corresponding side face of the first blade, and the heel of the second blade against the second and third abutment, rather than impose hyperstatic threading standardized bores on pawns of centering according to a normal approach to the receiving surface.

Avantageusement, la mise en appui isostatique sur trois points de référence, disposés en triangle de sorte à épouser les contours externes de la seconde lame, permet d'ajuster librement et facilement, de façon fine mais déterministe, la configuration spatiale de ladite seconde lame par rapport à la première lame, en agissant simplement sur au moins l'un des appuis, et plus particulièrement sur l'un des points d'appui du talon contre la seconde butée ou contre la troisième butée.Advantageously, the isostatic pressing on three reference points, arranged in a triangle so as to match the outer contours of the second blade, makes it possible to adjust freely and easily, in a fine but deterministic manner, the spatial configuration of said second blade by relative to the first blade, by simply acting on at least one of the supports, and more particularly on one of the bearing points of the heel against the second stop or against the third stop.

En effet, toute modification d'un appui du talon est automatiquement accommodée par les deux appuis restants, par simple glissement et/ou basculement de la seconde lame, et plus particulièrement de son talon et de sa face latérale, contre les deux autres butées correspondantes.Indeed, any modification of a heel support is automatically accommodated by the two remaining supports, simply by sliding and / or tilting of the second blade, and more particularly of its heel and its lateral face, against the other two corresponding stops .

La configuration de la seconde lame en phase de pré-positionnement est donc facilement adaptable, simplement en retouchant l'un et/ou l'autre des contacts talon/butées, et plus particulièrement sans qu'il soit nécessaire d'effectuer la moindre reprise d'usinage sur les butées de positionnement elles-mêmes, sur le bâti, sur le profil de découpe des lames, ou bien encore sur les tranches desdites lames destinées à être accolées.The configuration of the second blade in the pre-positioning phase is therefore easily adaptable, simply by retouching one and / or the other of the heel / stop contacts, and more particularly without the need to perform any recovery. machining on the positioning stops themselves, on the frame, on the cutting profile of the blades, or even on the edges of said blades intended to be contiguous.

Avantageusement, on peut donc procéder facilement à la mise au point de l'outil directement sous presse, par essais itératifs.Advantageously, it can therefore easily proceed to the development of the tool directly in press, by iterative tests.

En outre, la plupart des organes de l'outillage, et en particulier la plupart des faces des lames, n'étant pas destinés à être retouchés, ils peuvent être usinés et approvisionnés d'emblée à leur cotes et dans leur finition définitives, ce qui assure une économie de temps, de matière, et de main d'oeuvre.In addition, most of the tools, and in particular most of the faces of the blades, are not intended to be retouched, they can be machined and supplied immediately to their side and in their final finish, this which saves time, material and manpower.

C'est seulement après que le pré-positionnement libre a permis de relever la configuration spatiale appropriée qu'intervient la fixation proprement dite de la seconde lame, fixation qui assure le positionnement et le blocage définitifs de la seconde lame dans la configuration spatiale retenue.It is only after the free pre-positioning has made it possible to note the appropriate spatial configuration that the fixing properly said second blade, fixing which ensures the final positioning and blocking of the second blade in the retained spatial configuration.

Avantageusement, ce blocage dans une configuration destinée à rester invariante ne nécessite plus d'être modifié a posteriori. Advantageously, this blocking in a configuration intended to remain invariant no longer needs to be modified a posteriori.

Les objets assignés à l'invention sont aussi atteints par un outillage avec les caractéristiques de la revendication 10.The objects assigned to the invention are also achieved by tooling with the features of claim 10.

D'autres objets, caractéristiques et avantages de l'invention apparaîtront plus en détail à la lecture de la description qui suit, ainsi qu'à l'aide des dessins annexés, fournis à titre purement illustratif parmi lesquels :

  • La figure 1 illustre, selon une vue d'ensemble en perspective, un outillage conforme à un mode de réalisation préféré de l' l'invention.
  • La figure 2 illustre, selon une vue de détail du dessus, un exemple d'assemblage de lames de découpe par le procédé conforme à l'invention, selon la configuration mise en oeuvre au sein de l'outillage représenté sur la figure 1.
  • La figure 3 illustre, selon une vue partielle de dessus, le détail du piètement du talon d'une lame par une butée de positionnement anti-recul conforme à l'invention, au sein de l'assemblage de la figure 2.
  • La figure 4 illustre, selon une vue en coupe transverse à la lame, un outillage conforme à l'invention en configuration de cisaillement.
Other objects, features and advantages of the invention will appear in more detail on reading the description which follows, and with the aid of the accompanying drawings, provided for purely illustrative purposes, among which:
  • The figure 1 illustrates, according to an overall perspective view, a tool according to a preferred embodiment of the invention.
  • The figure 2 illustrates, in a detail view from above, an example of assembly of cutting blades by the method according to the invention, according to the configuration implemented within the tooling shown in the figure 1 .
  • The figure 3 illustrates, in a partial view from above, the detail of the base of the heel of a blade by an anti-recoil positioning stop according to the invention, within the assembly of the figure 2 .
  • The figure 4 illustrates, in a sectional view transverse to the blade, a tool according to the invention in shear configuration.

La présente invention concerne un procédé d'assemblage d'un outillage de presse à cisailler 1.The present invention relates to a method of assembling a press tool shear 1.

Tel que cela est notamment illustré sur les figures 1, 3 et 4, ledit outillage 1 comprend au moins un bâti 2, 102, et plus particulièrement un premier bâti 2 et un second bâti 102 qui sont destinés à être montés mobiles l'un par rapport à l'autre, et de préférence fixés respectivement au tablier (inférieur) fixe et au tablier (supérieur) mobile d'une presse à cisailler (non représentée), de sorte à pouvoir être alternativement écartés, pour permettre l'insertion entre eux d'un flan 3 à découper, puis rapprochés l'un de l'autre selon un mouvement de cisaillement MC, ici en translation verticale sur la figure 4, de sorte à provoquer le cisaillement dudit flan 3.As illustrated in particular in the Figures 1, 3 and 4 said tooling 1 comprises at least one frame 2, 102, and more particularly a first frame 2 and a second frame 102 which are intended to be mounted movable with respect to each other, and preferably respectively fixed to the deck ( lower) and the movable (upper) apron of a shearing press (not shown), so as to be alternately spaced, to allow the insertion between them of a blank 3 to be cut, and then close together one of the other according to a shearing movement M C , here in vertical translation on the figure 4 , so as to cause the shearing of said blank 3.

Le flan 3 sera de préférence formé par une pièce de tôle métallique, notamment d'acier ou d'aluminium, laquelle pourra présenter par exemple une épaisseur de l'ordre de 0,5 mm à 2 mm.The blank 3 will preferably be formed by a piece of sheet metal, in particular steel or aluminum, which may for example have a thickness of the order of 0.5 mm to 2 mm.

L'au moins un bâti 2, et le cas échéant chaque bâti 2, 102, présente une surface de réception 4, 104 qui est destinée à être placée sensiblement normalement au mouvement de cisaillement MC, et qui est agencée pour accueillir une succession de lames de découpe 5, 6, 7 (respectivement 105, 106, 107 pour les lames correspondantes du second bâti 102) destinées à matérialiser les tronçons consécutifs d'un tracé de cisaillement prédéterminé.The at least one frame 2, and where appropriate each frame 2, 102, has a receiving surface 4, 104 which is intended to be positioned substantially normally to the shearing movement M C , and which is arranged to accommodate a succession of cutting blades 5, 6, 7 (respectively 105, 106, 107 for the corresponding blades of the second frame 102) intended to materialize the consecutive sections of a predetermined shear pattern.

Bien entendu, de manière générale, les caractéristiques décrites en référence à un bâti et/ou aux éléments qui s'y trouvent embarqués seront éventuellement applicables mutatis mutandis à l'autre bâti et aux éléments correspondants qui s'y trouvent embarqués. Les références correspondantes seront les cas échéant incrémentées d'une valeur 100.Of course, in general, the features described with reference to a frame and / or elements embedded therein will be applicable mutatis mutandis to the other frame and the corresponding elements embedded therein. The corresponding references will, if necessary, be incremented by a value of 100.

Selon l'invention, et tel que cela est notamment visible sur les figures 2 et 4, lesdites lames 5, 6, 7, 105, 106, 107 sont délimitées chacune par une face de base 6B, 106B agencée pour venir en appui contre la surface de réception 4, par une face frontale de coupe 5C, 6C, 7C, 106C qui se dresse par rapport à ladite face de base 6B, 106B de telle sorte que le cisaillement puisse s'opérer le long de ladite face frontale, par une face dorsale 5T, 6T, 7T, 106T formant talon à l'opposé de ladite face frontale de coupe 5C, 6C, 7C, 106C, ainsi que par une première face latérale 5D, 6D, 7D et une seconde face latérale 5G, 6G, 7G opposées, qui relient chacune la face frontale 5C, 6C, 7C à la face dorsale 5T, 6T, 7T.According to the invention, and as this is particularly visible on the Figures 2 and 4 , said blades 5, 6, 7, 105, 106, 107 are each delimited by a base face 6B, 106B arranged to bear against the receiving surface 4, by a front end face 5C, 6C, 7C, 106C which is raised with respect to said base face 6B, 106B so that the shear can occur along said front face, by a dorsal face 5T, 6T, 7T, 106T forming a heel opposite said face cutting face 5C, 6C, 7C, 106C, as well as a first lateral face 5D, 6D, 7D and a second lateral face 5G, 6G, 7G opposite, each of which connects the front face 5C, 6C, 7C to the dorsal face 5T, 6T, 7T.

De préférence, tel que cela est également visible sur les figures 2 et 4, le procédé met en oeuvre des lames 5, 6, 7 dont les faces de coupe respectives 5C, 6C, 7C forment chacune en longueur une pluralité de dents 8 successives qui suivent un profil ondulé, par exemple sensiblement sinusoïdal.Preferably, as is also visible on the Figures 2 and 4 , the method uses blades 5, 6, 7 whose respective cutting faces 5C, 6C, 7C each form in length a plurality of successive teeth 8 which follow a corrugated profile, for example substantially sinusoidal.

Un tel agencement dentelé accroît avantageusement l'efficacité du cisaillement, en permettant une économie de matière lors de la découpe du flan 3.Such a serrated arrangement advantageously increases the effectiveness of the shear, by allowing a saving of material during the cutting of the blank 3.

On désignera de manière générale par « zone de coupe 10 » la région de l'espace comprise entre d'une part les faces de coupe 5C, 6C, 7C d'un jeu de lames appartenant au premier bâti 2 et d'autre part les faces de coupe 106C des lames correspondantes appartenant au second bâti 102, c'est-à-dire la zone comprise entre les limites frontales des différents jeux de lames entre lesquelles doit intervenir le cisaillement du flan 3.The region of the space between, on the one hand, the cutting faces 5C, 6C, 7C of a set of blades belonging to the first frame 2 and, on the other hand, the cutting faces 106C corresponding blades belonging to the second frame 102, that is to say the area between the front limits of the different sets of blades between which must intervene the shear of the blank 3.

Par convention et par commodité de description, on affectera à l'outillage 1, et plus particulièrement au bâti 2 concerné, un repère orthonormé direct (X, Y, Z) dont l'axe vertical Z porte le mouvement de cisaillement MC, dont l'axe X horizontal correspond sensiblement à la direction frontale/dorsale qui va du talon 5T, 6T, 7T à la face de coupe 5C, 6C, 7C correspondante, et selon laquelle les faces latérales 5G, 5D, 6G, 6D, 7G, 7D s'étendent de préférence, et dont l'axe Y horizontal correspond sensiblement à la profondeur selon laquelle les lames 5, 6, 7 d'un même bâti 2, et plus précisément les lames jointives 5, 6, 7 délimitant un même tracé de cisaillement continu, se succèdent longitudinalement.By convention and for convenience of description, the tooling 1, and more particularly the frame 2 concerned, will be assigned a direct orthonormal reference (X, Y, Z) whose vertical axis Z carries the shearing movement M C , of which the horizontal X axis corresponds substantially to the frontal / dorsal direction which goes from the heel 5T, 6T, 7T to the corresponding cutting face 5C, 6C, 7C, and according to which the lateral faces 5G, 5D, 6G, 6D, 7G, 7D preferably extend, and whose axis Y horizontal corresponds substantially to the depth according to which the blades 5, 6, 7 of the same frame 2, and more precisely the contiguous blades 5, 6, 7 delimiting the same continuous shear pattern, follow one another longitudinally.

La surface de réception 4 sera préférentiellement plane, et pourra alors correspondre au plan (X, Y) normal à la direction Z du mouvement de cisaillement. Il en ira de préférence de même pour les faces d'appui 6B, 106B des lames.The receiving surface 4 will preferably be flat, and may then correspond to the plane (X, Y) normal to the Z direction of the shearing motion. It will preferably the same for the bearing surfaces 6B, 106B of the blades.

Ladite surface de réception 4 sera par ailleurs de préférence commune aux différentes lames 5, 6, 7, et pourra éventuellement, tel que cela est illustré sur la figure 4, correspondre à la plate-forme d'une semelle, surélevée par rapport au fond du bâti 2.Said reception surface 4 will moreover preferably be common to the various blades 5, 6, 7, and may possibly, as illustrated on FIG. figure 4 , corresponding to the platform of a sole, raised above the bottom of the frame 2.

Selon l'invention, le procédé comporte une étape (a) d'initialisation au cours de laquelle on rapporte sur la surface de réception 4 une première lame de découpe 5, dont une face de jonction latérale 5G libre forme, en saillie par rapport à la surface de réception 4, une première butée de positionnement 11, une étape (b) de constitution d'un guidage anti-recul, au cours de laquelle on fixe au bâti 2, à distance de l'emplacement de la première butée de positionnement 11, au moins une seconde butée de positionnement 12 et une troisième butée de positionnement 13 distantes l'une de l'autre, qui font saillie par rapport à la surface de réception 4, puis une étape (c) d'empilement linéaire au cours de laquelle on rapporte une seconde lame de découpe 6 sur la surface de réception 4, à côté de la première lame 5, en adossant simultanément d'une part le talon 6T de ladite seconde lame 6 contre la seconde et la troisième butée de positionnement 12, 13, afin de borner le recul TX de la seconde lame 6 vis-à-vis de la zone de coupe 10 tout en autorisant un déplacement longitudinal TY d'ajustement de ladite seconde lame, et d'autre part l'une des faces latérales de ladite seconde lame contre la première butée de positionnement 11, qui fait ainsi obstacle au déplacement longitudinal TY de la seconde lame 6, et ce de telle sorte que la face frontale de coupe 6C de la seconde lame 6 vient se placer sensiblement dans la continuité de la face de coupe 5C de la première lame 5.According to the invention, the method comprises a step (a) of initialization during which is reported on the receiving surface 4 a first cutting blade 5, a free 5G side junction face form, protruding from the reception surface 4, a first positioning stop 11, a step (b) of constituting an anti-recoil guide, during which it is fixed to the frame 2, at a distance from the location of the first positioning stop 11, at least one second positioning stop 12 and a third positioning stop 13 spaced apart from each other, which protrude from the receiving surface 4, then a step (c) of linear stacking during of which a second cutting blade 6 is attached to the receiving surface 4, next to the first blade 5, simultaneously resting on the one hand the heel 6T of said second blade 6 against the second and the third positioning abutment 12 , 13, in order to bo the recoil T X of the second blade 6 vis-à-vis the cutting zone 10 while allowing a longitudinal displacement T Y adjustment of said second blade, and secondly one of the lateral faces of said second blade against the first positioning stop 11, which thus hinders the longitudinal displacement T Y of the second blade 6, so that the end face 6C of the second blade 6 is placed substantially in the continuity of the cutting face 5C of the first blade 5.

Avantageusement, l'ensemble formé par les trois butées de positionnement 11, 12, 13 non alignées forme une sorte de berceau triangulaire permettant l'engagement et la mise en appui isostatique de la seconde lame 6, et plus particulièrement de deux de ses bords libres sécants, en l'espèce son talon 6T et l'une des ses faces latérales 6D (la tranche droite sur la figure 2), par épaulement effectif contre chacune desdites butées de positionnement 11, 12, 13.Advantageously, the assembly formed by the three positioning stops 11, 12, 13 not aligned forms a kind of cradle triangular allowing engagement and isostatic pressing of the second blade 6, and more particularly of two of its secant free edges, in this case its heel 6T and one of its side faces 6D (the right edge on the figure 2 ), by effective shoulder against each of said positioning stops 11, 12, 13.

Le piètement isostatique procuré par les butées de positionnement 11, 12, 13 offre avantageusement un positionnement déterministe et stable de la seconde lame 6 par rapport à la première lame 5, en procurant un guidage qui borne d'une part le recul TX de la seconde lame 6 selon un sens porté par une première direction X (mais de fait autorise l'avance dans le sens opposé), et d'autre part le déplacement longitudinal TY de ladite seconde lame selon un sens porté par une seconde direction Y sécante, et de préférence perpendiculaire, à la première direction X, sans pour autant contraindre mécaniquement la disposition de la seconde lame 6 par un montage serré d'emblée.The isostatic base provided by the positioning stops 11, 12, 13 advantageously offers a deterministic and stable positioning of the second blade 6 with respect to the first blade 5, by providing a guide which limits the recoil T X of the second blade 6 in a direction carried by a first direction X (but in fact allows the advance in the opposite direction), and secondly the longitudinal displacement T Y of said second blade in a direction carried by a second y secant direction and preferably perpendicular to the first direction X, without mechanically constraining the arrangement of the second blade 6 by a tight fitting immediately.

En pratique, la seconde lame 6 peut donc conserver dans l'absolu, lors de l'étape (c) d'empilement linéaire, certains degrés de liberté autorisés par la liaison plan sur plan correspondant à la mise en appui de sa face de base 6B contre la surface de réception 4, et plus particulièrement les degrés de liberté en translation selon X et selon Y, ainsi qu'en en rotation en lacet autour de Z, ce qui permet d'ajuster librement la configuration cartésienne (position en translation) et azimutale (rotation en lacet) de ladite lame.In practice, the second blade 6 can therefore keep in absolute, during the linear stacking step (c), certain degrees of freedom allowed by the plane-to-plane connection corresponding to the support of its base face. 6B against the receiving surface 4, and more particularly the degrees of freedom in translation along X and Y, and in yaw rotation around Z, which allows to freely adjust the Cartesian configuration (translational position) and azimuth (yaw rotation) of said blade.

La seconde et la troisième butée de positionnement 12, 13 offrant à ce titre un coulissement guidé (TY) au talon 6T lorsque ce dernier vient en appui tangent contre lesdites butées 12, 13, il est possible d'adosser tout d'abord le talon 6T ouvert de la seconde lame 6 contre l'une et/ou l'autre, desdites seconde et troisième butées 12, 13, et de préférence simultanément contre les deux, pour ensuite faire glisser la seconde lame 6, au contact de la surface de réception 4 et de la rampe matérialisée par lesdites seconde et troisième butée 12, 13, jusqu'à ce que la face latérale 6D vienne, par abord latéral en suivant une trajectoire sensiblement transverse à la direction Z, au contact de la première butée 11, c'est-à-dire de la face latérale correspondante 5G de la première lame 5.The second and the third positioning stop 12, 13 offering in this respect a guided sliding (T Y ) at the heel 6T when the latter bears tangentially against said stops 12, 13, it is possible to lean against the open heel 6T of the second blade 6 against one and / or the other, said second and third stops 12, 13, and preferably simultaneously against both, to then slide the second blade 6, in contact with the surface receiving 4 and the ramp materialized by said second and third abutment 12, 13, until the side face 6D comes, by lateral approach along a substantially transverse path to the Z direction, in contact with the first stop 11 , i.e., the corresponding lateral face 5G of the first blade 5.

Inversement, ou de façon complémentaire, il est possible à la seconde lame 6 de prendre appui contre la première butée 11 puis de basculer et/ou glisser en appui contre ladite butée pour venir se caler, par abord latéral sensiblement transverse à la direction Z, contre la seconde et la troisième butée 12, 13.Conversely, or in a complementary manner, it is possible for the second blade 6 to bear against the first abutment 11 and then to tilt and / or slide in abutment against said abutment to come stall, by lateral approach. substantially transverse to the Z direction, against the second and third abutments 12, 13.

Avantageusement, quel que soit le cheminement employé, la seconde lame 6 vient finalement se caler tangentiellement, de manière déterministe, dans le berceau isostatique formé par l'ensemble des trois butées de positionnement 11, 12, 13, l'appui contre deux des butées 12, 13 ne contrariant pas la mise en appui contre la troisième butée 11.Advantageously, irrespective of the path used, the second blade 6 finally settles tangentially, deterministically, in the isostatic cradle formed by all three positioning stops 11, 12, 13, bearing against two stops 12, 13 not opposing the bearing against the third stop 11.

De préférence, les portions du talon 6T destinées à venir en contact respectivement avec la seconde et la troisième butée de positionnement 12, 13 sont sensiblement planes et parallèles, et de préférence coplanaires.Preferably, the portions of the heel 6T intended to come into contact respectively with the second and the third positioning abutment 12, 13 are substantially flat and parallel, and preferably coplanar.

Avantageusement, les différentes portions du talon 6T pourront ainsi former un front de glissement plan, de type rampe, permettant de guider de façon stable et efficace la translation longitudinale TY de la seconde lame 6.Advantageously, the different portions of the heel 6T will thus be able to form a plane sliding front, of the ramp type, for stably and effectively guiding the longitudinal translation T Y of the second blade 6.

A ce titre, et par commodité de fabrication, le talon 6T pourra avantageusement former une face dorsale plane qui s'étend de manière continue d'un seul tenant au moins sur le tronçon compris entre la seconde et la troisième butée 12, 13.As such, and for convenience of manufacture, the heel 6T may advantageously form a flat dorsal face which extends continuously in one piece at least on the portion between the second and the third abutment 12, 13.

Ladite face dorsale 6T sera de préférence générée d'une part par une composante Z normale à la surface de réception 4 et à la face de base 6B, et d'autre part par un segment rectiligne destiné à venir s'appliquer tangentiellement contre la seconde butée 12 et contre la troisième butée 13.Said dorsal face 6T will preferably be generated on the one hand by a component Z normal to the receiving surface 4 and to the base face 6B, and on the other hand by a rectilinear segment intended to be applied tangentially against the second stop 12 and against the third stop 13.

De préférence, lors de l'étape (b) de constitution d'un guidage anti-recul, on réalise la seconde butée de positionnement 12 et la troisième butée de positionnement 13 au moyen respectivement d'une première goupille d'arrêt et d'une seconde goupille d'arrêt, toutes deux cylindriques de base circulaire, que l'on introduit chacune dans un alésage 14, 15 de diamètre correspondant percé dans le bâti 2, à partir de la surface de réception 4, tel que cela est notamment illustrés sur les figures 2, 3 et 4.Preferably, during step (b) of constituting an anti-recoil guide, the second positioning stop 12 and the third positioning stop 13 are made by means of a first locking pin and a second locking pin respectively. a second locking pin, both cylindrical circular base, which is each introduced into a bore 14, 15 of corresponding diameter pierced in the frame 2, from the receiving surface 4, as shown in particular on the Figures 2, 3 and 4 .

Lesdites goupilles d'arrêt 12, 13 faisant ainsi saillie normalement à la surface de réception 4, le talon 6T de la seconde lame 6 peut venir en appui ponctuel tangent, de type plan sur courbe, contre les parois latérale incurvées desdites goupilles d'arrêt 12, 13, et ainsi coulisser le long de la droite fictive tangente à ces deux goupilles d'arrêt.Said locking pins 12, 13 thus projecting normally to the receiving surface 4, the heel 6T of the second blade 6 can come into tangent point-like support, of plane-on-curve type, against the curved side walls of said stop pins. 12, 13, and slide along the imaginary line tangent to these two stop pins.

Lesdites goupilles d'arrêt seront de préférence réalisées dans un matériau métallique, et préférentiellement traitées, par exemple nitrurées, pour améliorer leur dureté et leur rigidité, et par conséquent la précision du réglage pour lequel elles offrent chacune une surface de référence.Said stop pins are preferably made of a metallic material, and preferably treated, for example nitrided, for to improve their hardness and rigidity, and consequently the precision of the adjustment for which they each offer a reference surface.

Pour ajuster convenablement la seconde lame 6 dans sa configuration cible, respectant les tolérances de cisaillement, il peut être nécessaire (ou non) de retravailler les contacts de la lame 6 considérée, et plus particulièrement de son talon 6T, avec l'une et/ou l'autre de ses butées de positionnement 11, 12, 13.To properly adjust the second blade 6 in its target configuration, respecting the shear tolerances, it may be necessary (or not) to rework the contacts of the blade 6 in question, and more particularly of its heel 6T, with one and / or either of its positioning stops 11, 12, 13.

A ce titre, le procédé conforme à l'invention comprend de préférence une étape (d) de vérification au cours de laquelle on vérifie, par exemple par un essai de cisaillement d'une feuille de papier sous presse de mise au point, la conformité de la configuration des lames 5, 6 présentes sur le bâti 2, puis, selon que la vérification se révèle négative ou au contraire positive, soit une étape (e) de correction, au cours de laquelle on modifie l'épaisseur du contact entre le talon 6T de la seconde lame 6 et l'une et/ou l'autre des seconde et troisième butées de positionnement 12, 13, afin d'ajuster la position cartésienne et/ou l'orientation azimutale en lacet de la seconde lame 6 par rapport à la première lame 5, soit une étape (f) de fixation définitive, au cours de laquelle on solidarise la seconde lame 6 au bâti 2 dans la configuration vérifiée.As such, the method according to the invention preferably comprises a step (d) of verification during which it is verified, for example by a shear test of a sheet of paper press debugging, compliance of the configuration of the blades 5, 6 present on the frame 2, then, depending on whether the verification is negative or, on the contrary, positive, a step (e) of correction, during which the thickness of the contact between the heel 6T of the second blade 6 and one and / or the other of the second and third positioning stops 12, 13, in order to adjust the Cartesian position and / or the yaw azimuthal orientation of the second blade 6 by relative to the first blade 5, a final fixing step (f), during which the second blade 6 is secured to the frame 2 in the verified configuration.

On peut ainsi opérer un positionnement itératif, par une succession d'essais à blanc et de corrections sans dommage ni contrainte pour le bâti 2, les butées de positionnement 12, 13 elles-mêmes ou les faces de coupe 5C, 6C des lames, jusqu'à obtenir la configuration convenable (configuration vérifiée) de la lame 6, dans laquelle ladite lame est alors fixée au bâti.It is thus possible to perform iterative positioning, by a succession of blank tests and corrections without damage or stress for the frame 2, the positioning stops 12, 13 themselves or the cutting faces 5C, 6C of the blades, until to obtain the appropriate configuration (verified configuration) of the blade 6, wherein said blade is then fixed to the frame.

Avantageusement, la capacité d'ajustement plan bidirectionnel offerte par le montage selon l'invention permet d'ajuster le jeu d'assemblage des lames 5, 6 selon deux directions X, Y sécantes, et plus particulièrement sensiblement perpendiculaires, sans nécessiter de retouches complexes, et notamment sans requérir de reprise d'usinage du bâti 2, du profil de coupe des lames ou des faces latérales 5G, 6D de jonction desdites lames.Advantageously, the bidirectional plane adjustment capacity offered by the assembly according to the invention makes it possible to adjust the assembly clearance of the blades 5, 6 in two intersecting X, Y directions, and more particularly substantially perpendicular, without requiring complex retouching. , and in particular without requiring the machining of the frame 2, the cutting profile of the blades or the lateral faces 5G, 6D of junction of said blades.

En l'espèce, on peut ainsi adapter très librement le jeu de joint JL longitudinal (selon la direction Y sur la figure 2) entre les faces latérales 5G, 6D des lames 5, 6 qui sont accolées bord à bord sensiblement selon un plan de joint commun, et ce afin de garantir la continuité et la régularité du tracé de cisaillement, notamment dans le cas où la jonction s'opère dans un creux ou une bosse de profil dentelé.In the case in point, it is thus possible to very freely adapt the set of longitudinal joint J L (in the direction Y on the figure 2 ) between the side faces 5G, 6D of the blades 5, 6 which are joined edge to edge substantially in a common joint plane, and this to ensure the continuity and regularity of the shear pattern, especially in the case where the junction s operates in a hollow or bump of serrated profile.

En pratique, on pourra notamment maintenir un jeu de joint JL inférieur à 0,03 mm, et notamment compris entre 0,01 mm et 0,03 mm.In practice, it will be possible in particular to maintain a seal set J L less than 0.03 mm, and in particular between 0.01 mm and 0.03 mm.

De même, on pourra adapter aisément le jeu de cisaillement JC (en X sur la figure 4), qui correspond à la largeur de l'interstice ménagé entre les faces de coupe 6C, 106C des lames 6, 106 associées respectivement au premier bâti 2 et au second bâti 102 pour permettre la génération d'une contrainte de cisaillement efficace.Similarly, the shearing clearance J C (in X on the figure 4 ), which corresponds to the width of the gap formed between the cutting faces 6C, 106C of the blades 6, 106 respectively associated with the first frame 2 and the second frame 102 to allow the generation of an effective shear stress.

En pratique, ce jeu de cisaillement JC pourra être compris entre 0,03 mm et 0,05 mm.In practice, this shearing game J C may be between 0.03 mm and 0.05 mm.

Selon une possibilité de mise en oeuvre, l'étape (e) de correction peut comprendre une sous-étape (e1) de calage au cours de laquelle on interpose une cale 16 additionnelle d'épaisseur choisie entre au moins l'une des seconde et troisième butées de positionnement 12, 13 et la (ou les) portion(s) correspondante(s) du talon 6T de la seconde lame 6 (tel que cela est représenté en pointillés sur la figure 3).According to an implementation possibility, the correction step (e) may comprise a sub-step (e1) of wedging during which an additional spacer 16 of thickness chosen is interposed between at least one of the second and third positioning stops 12, 13 and the corresponding portion (s) of the heel 6T of the second blade 6 (as shown in dashed line on the figure 3 ).

A ce titre, on peut notamment insérer une ou plusieurs lamelles de feuillard, de préférence métallique, d'épaisseur calibrée pouvant être comprise entre 0,02 mm et 0,2 mm.In this respect, it is possible, in particular, to insert one or more strips of strip, preferably of metal, of calibrated thickness which may be between 0.02 mm and 0.2 mm.

L'invention permet ainsi de régler très finement l'avance et/ou le basculement de la lame 6 vers la zone de coupe 10, par un procédé très polyvalent et réversible, qui sait s'adapter à une grande variété de configurations.The invention thus makes it possible to very finely adjust the advance and / or tilting of the blade 6 towards the cutting zone 10, by a very versatile and reversible process, which can adapt to a large variety of configurations.

De manière alternative ou complémentaire à la sous-étape (e1) de calage, l'étape (e) de correction peut comprendre une sous-étape (e2) de retouche au cours de laquelle on retire de la matière au talon 6T de la seconde lame 6, au niveau de l'une et/ou l'autre de ses zones de contact avec respectivement la première et la seconde butée de positionnement 12, 13.In alternative or complementary manner to the sub-step (e1) of wedging, the step (e) of correction may comprise a sub-step (e2) retouching during which one removes material heel 6T of the second blade 6, at one and / or the other of its contact zones with respectively the first and the second positioning stop 12, 13.

Ainsi, s'il est nécessaire de reculer davantage la lame 6, et plus particulièrement sa face de coupe 6C, afin de l'éloigner (ici au moins selon une composante en X) de la zone de coupe 10, on pourra amincir ladite lame 6 en rognant son talon 6T localement ou sur toute sa longueur.Thus, if it is necessary to further move the blade 6, and more particularly its cutting face 6C, in order to move it away (in this case at least in an X-component) from the cutting zone 10, it will be possible to thin said blade 6 by trimming his heel 6T locally or over its entire length.

Le creusement du talon 6T pourra par exemple s'effectuer par meulage.The digging of the heel 6T may for example be done by grinding.

Quelle que soit la méthode de réglage envisagée, en ajout comme en soustraction de matière, et donc d'épaisseur, on notera que le réglage affecte au plus seulement le talon 6T, et préserve totalement l'intégrité du bâti 2, des goupilles d'arrêt 12, 13, des faces de coupes 5C, 6C, et des bords de jonction latéraux 5G, 6D.Whatever the method of adjustment envisaged, in addition as in subtraction of material, and therefore of thickness, one will note that the adjustment affects at most only the heel 6T, and preserves totally the integrity of the frame 2, locking pins 12, 13, cutting faces 5C, 6C, and lateral joining edges 5G, 6D.

De préférence, l'étape (f) de fixation définitive comprend une sous-étape (f1) de contreperçage, au cours de laquelle on contreperce le bâti 2 à travers la seconde lame 6 placée et bridée dans la configuration vérifiée, de sorte à former au moins un, et de préférence deux, puits de centrage 17, 18, puis une sous-étape (f2) de goupillage au cours de laquelle on introduit dans le ou les puits de centrage 17, 18 des goupilles 20, 21 de diamètre correspondant, afin d'immobiliser la seconde lame 6 par rapport au bâti 2 dans la configuration retenue.Preferably, the final fixing step (f) comprises a sub-step (f1) of counterpitching, during which the frame 2 is counterplaced through the second blade 6 placed and clamped in the verified configuration, so as to form at least one, and preferably two, centering wells 17, 18, then a sub-step (f2) pinning during which is introduced into the centering wells or 17, 18 pins 20, 21 of corresponding diameter , in order to immobilize the second blade 6 relative to the frame 2 in the retained configuration.

Avantageusement, la mise en oeuvre d'un contreperçage, selon lequel on perce le bâti 2 à partir de la surface de réception 4 et à travers l'épaisseur de la lame 6 à immobiliser, permet de disposer, de manière simple et fiable, d'un référentiel unique, et d'un entraxe parfaitement coïncidant, entre d'une part les alésages d'immobilisation percés dans l'épaisseur de la lame 6 et correspondant aux tronçons supérieurs des puits de centrage 17, 18, et d'autres part les alésages homologues correspondant aux tronçons inférieurs percés dans le bâti 2.Advantageously, the implementation of a counterpunching, according to which the frame 2 is drilled from the receiving surface 4 and through the thickness of the blade 6 to be immobilized, makes it possible to dispose, simply and reliably, of a single reference system, and a perfectly coinciding spacing between, on the one hand, the immobilization bores pierced in the thickness of the blade 6 and corresponding to the upper sections of the centering wells 17, 18, and on the other hand the homologous bores corresponding to the lower sections pierced in the frame 2.

Les positions des éléments de centrage (puits et goupilles) étant définies empiriquement à partir de la lame 6 à fixer après réglage de celle-ci, et non plus de manière arbitraire et théorique à partir du bâti 2, elles seront mises en oeuvre une fois pour toutes, sans nécessiter de reprise ultérieure.The positions of the centering elements (wells and pins) being defined empirically from the blade 6 to be fixed after adjustment thereof, and no longer arbitrarily and theoretically from the frame 2, they will be implemented once. for all, without the need for a later recovery.

Ainsi, ont pourra obtenir un maintien bidirectionnel (en X et en Y) définitif de la lame 6 sur le bâti sans introduction de jeux ou de tolérances d'usinage ou d'assemblage, au moyen d'un, et de préférence deux, ajustements goupille 20, 21/puits de centrage 17, 18, offrant des ajustements de type guidage précis, ajusté ou même serrage léger.Thus, it will be possible to obtain a bidirectional maintenance (in X and Y) definitive of the blade 6 on the frame without introduction of games or tolerances of machining or assembly, by means of one, and preferably two, adjustments pin 20, 21 / centering wells 17, 18, providing precise, adjusted, or even light-weighting-type adjustments.

A ce titre, on pourra employer des puits 17, 18 alésés à la tolérance normalisée H7.As such, it will be possible to use wells 17, 18 reamed at the standardized tolerance H7.

Les goupilles 20, 21 correspondantes pourront par exemple présenter une finition de type g6, h6 ou k6, selon le degré de précision voire de serrage recherché.The corresponding pins 20, 21 may for example have a finish type g6, h6 or k6, depending on the degree of accuracy or desired tightening.

De préférence, lors de l'étape (a) d'initialisation, on positionne et l'on fixe d'emblée la première lame 5 dans une configuration unique prédéterminée qui correspond à sa configuration définitive.Preferably, during the step (a) of initialization, is positioned and is fixed from the outset the first blade 5 in a predetermined single configuration that corresponds to its final configuration.

En d'autres termes, bien qu'il ne soit pas exclu d'usiner ou de fixer un organe de référence quelconque sur le bâti pour déterminer le point de départ de l'empilement linéaire de la série des lames 5, 6, 7, c'est de préférence la première lame 5 elle-même qui sert de référence au démarrage dudit empilement linéaire.In other words, although it is not excluded to machine or fix any reference member on the frame to determine the starting point of the linear stack of the series of blades 5, 6, 7, it is preferably the first blade 5 itself which serves as a reference for starting said linear stack.

Le maintien de la première lame 5 dans sa configuration spatiale unique et invariante peut être réalisé par goupillage 20", 21" dans des puits de centrage, avec ajustement en guidage précis, ajusté voire en serrage, de manière analogue à ce qui a été décrit plus haut en relation avec la seconde lame (mais sans piètement par goupilles d'arrêt cette fois).The maintenance of the first blade 5 in its unique and invariant spatial configuration can be achieved by pinning 20 ", 21" in centering wells, with adjustment in precise guiding, adjusted or tightened, in a manner similar to that which has been described. higher in relation to the second blade (but without stopping pins this time).

Bien entendu, le procédé peut se répéter de manière analogue pour chacune des lames 5, 6, 7 posées successivement dans le prolongement l'une de l'autre, la troisième lame 7 venant par exemple prendre appui d'une part sur la face latérale 6G de la seconde lame située à l'opposé de la première lame 5, et d'autre part sur un second jeu de butées anti-recul 12', 13'.Of course, the method can be repeated in a similar manner for each of the blades 5, 6, 7 laid successively in the extension of one another, the third blade 7 coming for example to bear on the one hand on the side face 6G of the second blade located opposite the first blade 5, and secondly on a second set of anti-recoil stops 12 ', 13'.

La fixation définitive de la troisième lame 7 pourra ici encore être réalisée par goupillage 20', 21' dans des puits de guidage, tels que cela a été décrit plus haut.The final fixing of the third blade 7 can again be performed by pinning 20 ', 21' in guide wells, as described above.

Selon une variante de mise en oeuvre, chaque nouvelle lame pourra être d'abord pré-positionnée, puis sa configuration vérifiée et au besoin corrigée, avant que la lame ne soit immobilisée définitivement et que l'on passe seulement ensuite à la lame suivante, pour laquelle la lame ainsi fixée servira de référence.According to an alternative embodiment, each new blade may be first pre-positioned, then its configuration checked and if necessary corrected, before the blade is permanently immobilized and that one then passes only to the next blade, for which the blade thus fixed will serve as a reference.

Selon une autre variante de mise en oeuvre, on pourra pré-positionner conjointement toutes les lames 5, 6, 7 sur le bâti, procéder au réglage d'alignement des lames réglables (la seconde lame 6, la troisième lame 7, etc.) dans leur ensemble, lors d'une ou plusieurs mêmes étapes (d) de vérification et (e) de correction, et n'effectuer la fixation définitive de l'ensemble desdites lames 6, 7 lors d'une seule et même opération finale, par un contreperçage et un goupillage concernant l'ensemble des lames ainsi réglées.According to another variant embodiment, it is possible to pre-position all the blades 5, 6, 7 together on the frame, to adjust the alignment of the adjustable blades (the second blade 6, the third blade 7, etc.). as a whole, during one or more same steps (d) of checking and (e) of correction, and not making the final fixing of all said blades 6, 7 during one and the same final operation, by a counterpunching and a pinning on all the blades thus set.

Avantageusement, pour assurer le maintien des lames 5, 6, 7 (en Z) contre la surface de réception 4, que ce soit pour une fixation provisoire pendant l'étape (d) de vérification par essai sous presse ou pour une fixation définitive lors de l'étape (f), on pourra prévoir au sein de chaque lame un, ou de préférence au moins deux, organes de fixation 22, permettant par exemple un vissage à travers des trous lamés.Advantageously, to ensure the maintenance of the blades 5, 6, 7 (in Z) against the receiving surface 4, whether for temporary fixation during the step (d) of verification by press test or for a final fixation during in step (f), it will be possible within each blade one, or preferably at least two, fasteners 22, allowing for example screwing through holes lamés.

La présente invention concerne par ailleurs également un outillage 1 de presse à cisailler en tant que tel, qui aura été agencé selon le procédé décrit ci-dessus.The present invention also relates to a tool 1 shear press as such, which will have been arranged according to the method described above.

Plus particulièrement, l'invention se rapporte donc à un outillage 1 de presse à cisailler comprenant un bâti 2 sur lequel sont fixées longitudinalement en enfilade une première lame de découpe 5 et une seconde lame de découpe 6, ledit outillage comprenant des moyens de positionnement définitif 20, 21, 20', 21', 20", 21" comprenant au moins une première goupille de fixation 20, 20', 20" et une seconde goupille de fixation 21, 21', 21", cylindriques de base circulaire, lesdites goupilles de fixation étant enfoncées chacune respectivement dans un premier puits de centrage 17 et un second puits de centrage 18, formés chacun par un premier alésage percé dans le corps de la seconde lame 6 et un second alésage coaxial au premier alésage et percé dans le bâti 2, et d'autre part des moyens de pré-positionnement, distincts desdites goupilles de fixation 20, 21, lesdits moyens de pré-positionnement comprenant une première butée de positionnement 11, formée par l'une des faces latérales 5G de la première lame 5 qui procure un appui longitudinal à l'une des faces latérales 6D de la seconde lame de découpe, ainsi qu'une seconde butée de positionnement 12 et une troisième butée de positionnement 13 formées par une première et une seconde goupille d'arrêt, cylindriques de base circulaire, distantes l'une de l'autre, et contre lesquelles le talon 6T de la seconde lame 6 est adossé en appui tangent, sensiblement à l'opposé de la zone de coupe 10.More particularly, the invention therefore relates to a shear press tooling 1 comprising a frame 2 on which are fixed longitudinally in a row a first cutting blade 5 and a second cutting blade 6, said tool comprising positioning means definitive 20, 21, 20 ', 21', 20 ", 21" comprising at least a first fixing pin 20, 20 ', 20 "and a second securing pin 21, 21', 21", cylindrical circular base, said fixing pins being each respectively embedded in a first centering well 17 and a second centering well 18, each formed by a first bore drilled in the body of the second blade 6 and a second bore coaxial with the first bore and pierced in the frame 2, and secondly pre-positioning means, distinct from said fixing pins 20, 21, said pre-positioning means comprising a first positioning stop 11, formed by one of the 5G side aces of the first blade 5 which provides a longitudinal support to one of the side faces 6D of the second cutting blade, and a second positioning stop 12 and a third positioning stop 13 formed by a first and a second locking pin, cylindrical circular base, spaced from each other, and against which the heel 6T of the second blade 6 is backed tangentially, substantially opposite the cutting zone 10.

Tel que cela est expliqué plus haut, les moyens de pré-positionnement, et plus particulièrement les butées 11, 12, 13 sont agencés de telles sorte que, en l'absence du goupillage définitif 20, 21 (en l'espèce, avant la mise en place dudit goupillage définitif), ils autorisent un accostage libre de la seconde lame 6, et plus particulièrement de ses parois extrémales pleines dorsale 6T et latérale 6D, contre lesdites butées 11, 12, 13, selon une trajectoire sensiblement transverse à la normale Z à la surface de réception 4.As explained above, the pre-positioning means, and more particularly the stops 11, 12, 13 are arranged such that, in the absence of the final pinning 20, 21 (in this case, before the implementation of said final pinning), they allow a free docking of the second blade 6, and more particularly of its solid upper dorsal 6T and lateral 6D side walls, against said stops 11, 12, 13, in a substantially transverse trajectory to the normal Z at the receiving surface 4.

Claims (10)

  1. A method for assembling a shear press tool (1), said tool (1) including a frame (2) which has a receiving surface (4) intended to be placed substantially normally to the shearing movement (MC), and arranged to receive a series of cutting blades (5, 6, 7) intended to realize consecutive sections of a predetermined shearing line, said blades (5, 6, 7) each being delimited by a base face (6B) arranged to come to rest against the receiving surface (4), by a front cutting face (5C, 6C, 7C) which rises with respect to said base face (6B) such that the shearing can be carried out along said front face, by a dorsal face (5T, 6T, 7T) forming a heel opposite said front cutting face (5C, 6C, 7C), and by a first lateral face (5D, 6D, 7D) and a second lateral face (5G, 6G, 7G), which are opposite, which each connect the front face to the dorsal face, said method being characterized in that it comprises an initialisation step (a), during which a first cutting blade (5) is mounted on the receiving surface (4), a free lateral joining face (5G) of which cutting blade forms, projecting with respect to the receiving surface, a first positioning stop (11), a step (b) of forming an anti-recoil guide, during which, at a distance from the site of the first positioning stop (11), at least a second positioning step (12) and a third positioning stop (13) are fixed to the frame (2), said stops being distant from one another, which project with respect to the receiving surface (4), then a linear stacking step (c) during which a second cutting blade (6) is mounted on the receiving surface (4), next to the first blade (5), simultaneously abutting on the one hand the heel (6T) of said second blade (6) against the second and the third positioning stop (12, 13), so as to limit the recoil (TX) of the second blade with respect to the cutting zone (10), whilst permitting a longitudinal adjustment displacement (TY) of said second blade (6), and on the other hand one of the lateral faces (6D) of said second blade (6) against the first positioning stop (11), which thus forms an obstacle to the longitudinal displacement (TY) of the second blade, and such that the frontal cutting face (6C) of the second blade comes to place itself substantially in the continuity of the cutting face (5C) of the first blade.
  2. The method according to claim 1, characterized in that it includes a verification step (d), during which, for example by a shearing test of a sheet of paper under an adjusting press, the conformity of the configuration of the blades (5, 6) present on the frame (2) is verified, then, depending on whether the verification proves to be negative or, on the contrary, positive, either a correction step (e), during which the thickness is modified of the contact between the heel (6T) of the second blade (6) and one and/or other of the second and third positioning stops (12, 13), so as to adjust the Cartesian position and/or the azimuthal yaw orientation of the second blade (6) with respect to the first blade (5), or a definitive fixing step (f), during which the second blade (6) is secured to the frame (2) in the verified configuration.
  3. The method according to claim 2, characterized in that the correction step (e) includes a shimming sub-step (e1), during which an additional shim (16) of selected thickness is interposed between at least one of the second and third positioning stops (12, 13) and the corresponding portion(s) of the heel (6T) of the second blade.
  4. The method according to claim 2 or 3, characterized in that the correction step (e) includes a rectification sub-step (e2), during which material is removed at the heel (6T) of the second blade (6), at the level of one and/or the other of its contact zones with respectively the first and the second positioning stop (12, 13).
  5. The method according to one of claims 2 to 4, characterized in that the definitive fixing step (f) includes a countersinking sub-step (f1), during which the frame (2) is countersunk through the second blade (6) placed and clamped in the verified configuration, so as to form at least one, and preferably two, centring wells (17, 18), then a pinning sub-step (f2), during which pins (20, 21) of corresponding diameter are introduced in the centring well(s) (17, 18), so as to immobilise the second blade (6) with respect to the frame (2) in the retained configuration.
  6. The method according to one of the preceding claims, characterized in that, during the initialisation step (a), the first blade (5) is positioned and fixed from the outset in a single predetermined configuration which corresponds to its definitive configuration.
  7. The method according to one of the preceding claims, characterized in that the portions of the heel (6T) intended to come in contact respectively with the second and the third positioning step (12, 13) are substantially flat and parallel, and preferably coplanar.
  8. The method according to one of the preceding claims, characterized in that, during the step (b) of forming an anti-recoil guide, the second and the third positioning stop (12, 13) are realized by means respectively of a first detent pin and a second detent pin, cylindrical with a circular base, which are each introduced in a bore (14, 15) of corresponding diameter, drilled in the frame (2), from the receiving surface (4).
  9. The method according to one of the preceding claims, characterized in that it implements blades (5, 6, 7), the respective cutting faces (5C, 6C, 7C) of which each form lengthwise a plurality of successive teeth (8) which follow an undulating, for example substantially sinusoidal, profile.
  10. A shear press tool (1) including a frame on which there are fixed longitudinally in a row a first cutting blade (5) and a second cutting blade (6), said tool being characterized in that it includes means for definitive positioning, including at least a first and a second fixing pin (20, 21), cylindrical with a circular base, said fixing pins each being driven respectively into a first centring well (17) and a second centring well (18), each formed by a first bore drilled in the body of the second blade (6) and a second bore, coaxial to the first, drilled in the frame (2), and, on the other hand, pre-positioning means, distinct from said fixing pins, said pre-positioning means including a first positioning stop (11), formed by one of the lateral faces (5G) of the first cutting blade (5) which provides a longitudinal support to one of the lateral faces (6D) of the second cutting blade (6), and also a second positioning stop (12) and a third positioning stop (13) which are formed by a first and a second detent pin, cylindrical with a circular base, distant from one another, and against which the heel (6T) of the second blade is abutted in tangent support, substantially opposite the cutting zone (10).
EP13827013.7A 2013-01-09 2013-12-19 Positioning of cutting blades on a press frame Active EP2943298B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1350182A FR3000692B1 (en) 2013-01-09 2013-01-09 POSITIONING OF CUTTING BLADES ON A PRESS BUILDING
PCT/FR2013/053178 WO2014108618A1 (en) 2013-01-09 2013-12-19 Positioning of cutting blades on a press frame

Publications (2)

Publication Number Publication Date
EP2943298A1 EP2943298A1 (en) 2015-11-18
EP2943298B1 true EP2943298B1 (en) 2016-11-16

Family

ID=47902293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13827013.7A Active EP2943298B1 (en) 2013-01-09 2013-12-19 Positioning of cutting blades on a press frame

Country Status (3)

Country Link
EP (1) EP2943298B1 (en)
FR (1) FR3000692B1 (en)
WO (1) WO2014108618A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3141440U (en) * 2007-12-14 2008-05-08 株式会社メイク・ア・ボックス Transfer positioning jig
FR2956049B1 (en) * 2010-02-05 2012-02-03 Peugeot Citroen Automobiles Sa PUNCHING ASSEMBLY.

Also Published As

Publication number Publication date
EP2943298A1 (en) 2015-11-18
FR3000692B1 (en) 2015-02-20
FR3000692A1 (en) 2014-07-11
WO2014108618A1 (en) 2014-07-17

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