EP2943298A1 - Positionnement de lames de découpe sur un bâti de presse - Google Patents
Positionnement de lames de découpe sur un bâti de presseInfo
- Publication number
- EP2943298A1 EP2943298A1 EP13827013.7A EP13827013A EP2943298A1 EP 2943298 A1 EP2943298 A1 EP 2943298A1 EP 13827013 A EP13827013 A EP 13827013A EP 2943298 A1 EP2943298 A1 EP 2943298A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- positioning
- cutting
- frame
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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 the general field of press cutting tools for shearing sheets, and more particularly to the shaping of bodywork 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.
- 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.
- 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 which stands with respect to said base face so that the shear can be operated along said front face, by a dorsal face forming a heel opposite said front end face, and by a first side face and a second opposite side 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 there is reported on the receiving surface a first cutting blade, a free lateral junction face form, protruding by in relation to the receiving surface, a first positioning stop, a step (b) for constituting an anti-recoil guide, during which the frame is fixed to the frame,
- 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 preposition the second blade in isostatic support on the one hand on the receiving surface, and on the other hand, and above all, on three distinct points, materialized in projection of said surface. receiving by the positioning stops.
- the arrangement according to the invention makes it possible to place sliding tangential support, advantageously by a movement approach comprising at least one lateral component transverse to the shear direction, and substantially parallel to the receiving surface, respectively a lateral face (slice) of the second blade against the corresponding lateral face of the first blade, and the heel of the second blade against the second and third stops, rather than imposing hyperstatic threading standardized bores on centering pins in 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 prepositioning phase is 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 of 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.
- Figure 1 illustrates, in an overall perspective view, a tool according to the invention.
- FIG. 2 illustrates, in a detailed 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 FIG. 1.
- FIG. 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 FIG.
- Figure 4 illustrates, in a sectional view transverse to the blade, a tool according to the invention in shear configuration.
- the present invention relates to a method of assembling a press tool shear 1.
- said tool 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 movably one by relative to each other, and preferably fixed respectively to the fixed (lower) apron and the movable (upper) apron of a shearing press (not shown), so that they can be alternately spaced, to allow insertion between them of a blank 3 to be cut, then brought closer to one another in a shearing movement M c , here in vertical translation in FIG. 4, so as to cause the shearing of said blank 3.
- 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.
- the at least one frame 2, and optionally each frame 2, 102 has a receiving surface 4, 104 which is intended to be substantially normally placed in shear movement M c, and is arranged to receive a succession of cutting blades 5, 6, 7 (respectively 105, 106, 107 for the corresponding blades of the second frame 102) for materializing 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, with a front end face 5C, 6C, 7C, 106C which is raised with respect to said base face 6B, 106B so that shearing can occur along said front face, by a dorsal face 5T, 6T, 7T, 106T forming a heel opposite said front end face 5C, 6C, 7C, 106C, as well as a first lateral face 5D, 6D, 7D and a second lateral face 5G, 6G, 7G opposite, which each connect the front face 5C, 6C, 7C to the back face 5T, 6T, 7T.
- the method implements 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 axis X substantially corresponds 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 extend from preferably, and whose horizontal Y axis substantially corresponds to the depth in 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, succeed longitudinally.
- 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 be the same for the bearing faces 6B, 1 06B of the blades.
- Said receiving surface 4 will moreover preferably be common to the various blades 5, 6, 7, and may possibly, as illustrated in FIG. 4, correspond to the platform of a sole, raised with respect to 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 receiving surface 4, a first positioning stop 1 1, a step (b) of constituting an anti-recoil guide, during which is fixed to the frame 2, away from the location of the first stop of positioning 1 1, at least a second positioning stop 1 2 and a third positioning stop 1 3 spaced from each other, which project relative to the receiving surface 4, then a step (c) of linear stack during which there is reported a second cutting blade 6 on the receiving surface 4, next to the first blade 5, simultaneously leaning on the one hand the heel 6T of said second blade 6 against the second and third positioning stop 12, 1 3, afi n limit 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 1 1, which thus hinders the longitudinal
- the assembly formed by the three positioning stops 1 1, 1 2, 1 3 not aligned forms a kind of triangular cradle allowing the engagement and the 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 in FIG. 2), by effective shoulder against each of said positioning stops 1 1, 1 2, 1 3.
- the isostatic base provided by the positioning stops 1 1, 12, 1 3 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 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 direction Y secant, and preferably perpendicular to the first direction X, without necessarily mechanically constrain 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 providing in this respect a guided sliding (T Y ) at the heel 6T when the latter bears tangentially against said stops 1 2, 1 3, it is possible to lean against everything.
- said second and third stops 1 2, 1 3, and preferably simultaneously against both to then slide the second blade 6, to contact of the receiving surface 4 and the ramp materialized by said second and third stops 1 2, 1 3, until the lateral face 6D comes, by lateral approach along a trajectory substantially transverse to the direction Z, contact of the first stop 1 1, that is to say of the corresponding lateral face 5G of the first blade 5.
- the second blade 6 Conversely, or in a complementary manner, it is possible for the second blade 6 to bear against the first abutment 1 1 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 stops 1 2, 1 3.
- the second blade 6 irrespective of the path used, the second blade 6 finally settles tangentially, deterministically, in the isostatic cradle formed by all three positioning stops 1 1, 1 2, 1 3, the support against two of the stops 1 2, 1 3 does not conflict with the bearing against the third stop 1 1.
- the portions of the heel 6T intended to come into contact respectively with the second and the third positioning abutment 12, 1 3 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 a single piece at least on the portion between the second and the third stop 12, 1 3.
- 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 1 3.
- the second positioning abutment 12 and the third positioning abutment 13 are produced by means of a first locking pin and a second locking pin respectively.
- Said locking pins will preferably be made of a metallic material, and preferably treated, for example nitrided, to improve their hardness and rigidity, and therefore the accuracy of adjustment for which they each provide a reference surface.
- a metallic material preferably treated, for example nitrided, to improve their hardness and rigidity, and therefore the accuracy of adjustment for which they each provide 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.
- 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 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 6 (as shown in dashed lines in FIG. 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 counterpunching, 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 counterpunching 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 counterpitching, 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, in a simple and reliable manner, 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. 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 prepositioning means comprising a first positioning stop 1 1, formed by the 5G of the first blade 5 which provides a longitudinal support to one of the lateral faces 6D of the second cutting blade,
- the prepositioning means and more particularly the stops 1 1, 12, 13 are arranged such that, in the absence of the final pinning 20, 21 (in this case, before the setting in place 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 1 1, 12, 13, in a substantially transverse trajectory to the normal Z at the receiving surface 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shearing Machines (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1350182A FR3000692B1 (fr) | 2013-01-09 | 2013-01-09 | Positionnement de lames de decoupe sur un bati de presse |
| PCT/FR2013/053178 WO2014108618A1 (fr) | 2013-01-09 | 2013-12-19 | Positionnement de lames de découpe sur un bâti de presse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2943298A1 true EP2943298A1 (fr) | 2015-11-18 |
| EP2943298B1 EP2943298B1 (fr) | 2016-11-16 |
Family
ID=47902293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13827013.7A Active EP2943298B1 (fr) | 2013-01-09 | 2013-12-19 | Positionnement de lames de découpe sur un bâti de presse |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2943298B1 (fr) |
| FR (1) | FR3000692B1 (fr) |
| WO (1) | WO2014108618A1 (fr) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3141440U (ja) * | 2007-12-14 | 2008-05-08 | 株式会社メイク・ア・ボックス | 転移位置決め治具 |
| FR2956049B1 (fr) * | 2010-02-05 | 2012-02-03 | Peugeot Citroen Automobiles Sa | Ensemble de poinconnage. |
-
2013
- 2013-01-09 FR FR1350182A patent/FR3000692B1/fr not_active Expired - Fee Related
- 2013-12-19 EP EP13827013.7A patent/EP2943298B1/fr active Active
- 2013-12-19 WO PCT/FR2013/053178 patent/WO2014108618A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014108618A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3000692B1 (fr) | 2015-02-20 |
| FR3000692A1 (fr) | 2014-07-11 |
| EP2943298B1 (fr) | 2016-11-16 |
| WO2014108618A1 (fr) | 2014-07-17 |
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