EP3248734B1 - Dispositif de presse a faible friction - Google Patents
Dispositif de presse a faible friction Download PDFInfo
- Publication number
- EP3248734B1 EP3248734B1 EP16171531.3A EP16171531A EP3248734B1 EP 3248734 B1 EP3248734 B1 EP 3248734B1 EP 16171531 A EP16171531 A EP 16171531A EP 3248734 B1 EP3248734 B1 EP 3248734B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressing
- friction
- carrier
- slidable
- reducing
- 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.)
- Active
Links
- 238000003825 pressing Methods 0.000 title claims description 224
- 239000000463 material Substances 0.000 claims description 57
- 239000000969 carrier Substances 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 8
- 230000036961 partial effect Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 230000000284 resting effect Effects 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 229910000906 Bronze Inorganic materials 0.000 description 7
- 239000010974 bronze Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 7
- 230000003993 interaction Effects 0.000 description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- 239000011224 oxide ceramic Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052575 non-oxide ceramic Inorganic materials 0.000 description 1
- 239000011225 non-oxide ceramic Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
- B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
Definitions
- the present invention relates to a pressing device for verpessenden connecting particular tubular workpieces according to the preamble of claim 1.
- sleeve-shaped press fittings that are plastically deformable and made of metal, preferably made of steel.
- the inner diameter of the press fittings is greater than the outer diameter of the pipes to be connected, so that they are permanently compressed during radial compression on the lateral surface of the conduits.
- press slings in particular, which have a press ring which is open at a closing point and which consists of press-jaw elements connected to one another in an articulated manner, are suitable for this purpose.
- Such a press ring can be placed around the sleeve to be pressed around the sleeve and then tightened by means of a closing device.
- the EP 2 272 629 A1 discloses a press sling, which is open in the region of the end-pressing elements, and on which end-pressing elements in each case a pressing jaw carrier is provided with a slidably held pressing jaw.
- a pressing device for verpessenden connecting particular tubular workpieces comprises at least two circumferentially hingedly interconnected Pressarme which are pivotable relative to each other during the pressing process from a starting position into a pressing position about a pivot axis, and at least two pressing elements, which are each mounted on one of the press carrier and have a pressing surface for pressing.
- the press carriers have a receiving surface and the press elements have a bearing surface, the press elements resting with their bearing surface in a cooperation region on the receiving surface of the press carrier.
- the bearing surface and the pressing surface are designed such that at least one of the pressing elements is mounted displaceably in the circumferential direction on the press carrier.
- the pressing element and / or the stamping carrier is formed at least in a partial region of the cooperation region with a material which reduces the friction between the pressing element and the stamping substrate.
- the displacement of the pressing element takes place during the pressing process and is inter alia dependent on the frictional forces occurring between the pressing element and the press carrier or the workpiece to be pressed.
- a friction-reducing material at least in a partial region of the cooperation region, a friction-smooth sliding of the pressing element takes place in the press carrier as well as on the workpiece to be pressed.
- the risk of roughening their contact surfaces, in particular the receiving surfaces or storage areas thereby greatly minimized.
- a force distribution of the pressing elements which is uniform in the circumferential direction can always be effected on the workpieces to be pressed, which ensures a permanent, uniform deformation of the material and therefore complete pressing.
- the pressing device can have not only two, but three or more press carriers and pressing elements.
- not only one but two or more displaceable pressing elements can be provided.
- a displaceable pressing element is provided on each of the press carriers. That is, they are then no non-displaceable pressing elements available.
- all statements concerning a pressing device with two pressing carriers and pressing elements as well as a displaceable pressing element relate to pressing devices with a plurality of pressing carriers and pressing elements as well as several displaceable pressing elements.
- the portion of the interaction region formed with the friction-reducing material occupy an area of between 10% to 90%, preferably between 30% to 70% of the total area of the interaction region.
- the entire cooperation area is provided by the friction reducing material. This means that the entire receiving surface resp. entire bearing surface or these two surfaces are formed entirely from the friction-reducing material.
- the friction-reducing material is provided as at least one friction-reducing layer applied on the pressing element and / or the press carrier.
- the said layer thus provides at least parts of the bearing surface or the receiving surface.
- the layer is formed as an insert part and is arranged in a corresponding recess in the displaceable pressing element and / or the press carrier. That is, the insert part comprising the friction-reducing material can, as an additional, separate component in a corresponding recess in the region of the bearing surface of the pressing element resp. be used in a corresponding recess in the region of the receiving surface of the press carrier.
- the insert part is preferably dimensioned such that it laterally fits snugly into the recess of the pressing element (Presschem), but protrudes with its top over the bearing surface (receiving surface) and forms a contact surface with this top and the receiving surface of the press carrier (bearing surface of the pressing element) , Another possibility would be to provide such an insert part both in the press carrier and in the press element.
- the layer is provided as a coating on the pressing element and / or the print carrier.
- the pressing element in particular the displaceable pressing element, and / or the stamping carrier according to the first embodiment, a ferrous material content.
- the pressing element or the press carrier is preferably formed entirely from a ferrous material, such as steel.
- the sliding properties can be improved by placing one or more layers of the friction reducing material on the bearing surface of the displaceable pressing member.
- both the press carrier and the press element meet the strength requirements regarding pressure and tension, while at the same time ensuring good sliding of the press element in the press carrier.
- the friction reducing layer may extend over the full area of the interaction area.
- the friction-reducing layer may extend over the area of co-operation over part of the area under the conditions of the above range and in particular be arranged at the location of maximum pressure.
- the friction-reducing layer is applied centrally on the displaceable pressing element and extends in the circumferential direction along the entire length of the displaceable pressing element.
- the friction-reducing layer can also be arranged centrally on the print carrier.
- At least two mutually spaced friction-reducing layers are applied to the displaceable pressing element and extend transversely to the circumferential direction along the entire width of the displaceable pressing element.
- the friction reducing layer protrudes above the surface of the displaceable pressing member. This ensures that exclusively the friction-reducing layer provides the contact between the press carrier and the press element.
- the friction-reducing layer is applied by the plasma process.
- the displaceable pressing member is formed entirely of the friction reducing material.
- friction is reduced not only in a partial region of the interaction region of the pressing element with the pressure carrier, but over the entire region of the interaction region, ie over the entire receiving surface and bearing surface.
- Such a pressing element thus allows a nationwide reduction in friction.
- such a pressing element allows cost-effective production, since there are no additional manufacturing steps such as making additional or insert parts or, for example, additional coatings with appropriate materials.
- the print carrier is formed from a tensile and pressure-resistant material, such as steel. This fulfills the Pressing device Strength requirements regarding tension as well as pressure, while still maintaining good sliding properties of the pressing element.
- the friction-reducing material preferably comprises one or more metals and / or technical ceramics and / or plastics and / or fiber composite materials.
- Conceivable technical ceramics are, for example, oxide ceramics such as aluminum oxide, magnesium oxide, zirconium oxide and calcium oxide, and / or mixed oxide ceramics such as aluminum titanate, and / or non-oxide ceramics such as carbon, silicon carbide, silicon nitride and ⁇ / ⁇ silicon-aluminum nitride, and / or composite ceramics such as metal oxides. Ceramic composites and ceramic fiber composites.
- Conceivable metals are, for example, non-ferrous metals such as bronze and gray cast iron, and / or bimetals such as steel bronze, bronze iron, and bronze tin bronze. Preference is given to bronze CuSn12 (material number 2.0598 ⁇ 2.1090).
- the print media and the pressing elements are made of a material with a ferrous material content, in particular completely made of steel, then it is particularly preferred if the friction-reducing material resp. the at least one friction-reducing layer is selected from the list of non-ferrous metals or bimetals listed above. Furthermore, this material has a compressive strength of more than 50 megapascals.
- this material is particularly preferably selected from the list of technical ceramics listed above. Furthermore, this material preferably has a compressive strength of greater than 750 megapascals.
- the friction-reducing material has anti-adhesion properties and / or sliding properties.
- anti-adhesion properties or good sliding properties can counteract the removal of material, for example, of the displaceable pressing element during pressing, and a reduction in the required pressing pressure during the pressing can be achieved.
- Said friction reducing material preferably has a coefficient of sliding friction with respect to steel which is less than 0.4, preferably less than 0.3, more preferably less than 0.25, and / or said friction reducing material preferably has a static coefficient of friction with respect to steel which is less than 0.5, preferably less than 0.4, more preferably less than 0.35.
- the preferred coefficients of friction are preferably related to the unlubricated friction between the materials.
- a small surface roughness of the contact surfaces causes a small stiction between the press carrier and the pressing member, whereby the slidability of the displaceable pressing member is increased. Therefore, a small surface roughness of the friction reducing material is preferable.
- a comb can be integrally formed on the bearing surface of the pressing element or receiving surface of the press carrier, which is received in a corresponding groove in the press bar or press member, so that a guide for the displaceable pressing element is provided in the circumferential direction during the pressing process.
- the pressing device may have an opening between two press carriers, which is essentially closed in the press position, and / or the press carriers may be pivotable from a starting position into the press position, and the displaceable press element may slide along the press carriage during the pressing process in that, at the end of the pressing process, the press carriers and the pressing elements each form a substantially closed circle.
- the pressing device with its hingedly interconnected Press preferably forms an open press ring in its initial position, which in the region of the end-Pressisme resp.
- End-pressing elements is open and forms a closing point in this area.
- the closing can be done in particular by the fact that at the two end-Presciosgern an example, pliers-like trained drive element engages and moves the two end-Pressisme for closing the press ring radially toward each other.
- the displaceable pressing element can also be moved in the circumferential direction and moved toward further pressing elements. During the pressing process thus there is a gap, which is increasingly closed.
- the gap or opening between the end-pressing members and the end-pressing members is preferably substantially closed.
- FIGS. 1 and 2 each show a pressing device 1, 1 'for verpessenden connecting a tubular workpiece in the form of a press loop.
- the pressing devices 1, 1 ' according to the FIGS. 1 and 2 have in each case three in the circumferential direction hingedly interconnected Pressarme 2, 2 ', 2 "in the form of circular segment-shaped pressing jaw carriers, which are pivotable relative to each other during the pressing process from a starting position in a press position about a pivot axis.
- 2 each support openings 13, 13 ', 13", 13 "', 13"",13""', in which, for example, a bolt or a hinge joint can be used to the Pressecuring 2, 2', 2" pivotally to connect with each other.
- the print media 2, 2 ', 2 “have on their inner side 12, 12', 12" in each case a receiving surface 3, 3 ', 3 "and the press elements 4, 4', 4" have on their outer side 11, 11 ', 11 "in each case via a bearing surface 5, 5 ', 5", wherein the pressing elements 4, 4', 4 "with their bearing surface 5, 5 ', 5" in a cooperation area on the receiving surface 3, 3', 3 "of the carriage 2 , 2 ', 2 "rest.
- the pressing devices 1, 1 ' have a pressing element 4 and a press carrier 2, the bearing surface 5 respectively.
- Receiving surface 3 are formed to each other such that the pressing member 4 displaceable in the circumferential direction relative to the stamping carrier 2 at this is stored.
- the pressing element 4 and the press carrier 2 in a cooperation area on a friction between the pressing member 4 and the associated Pre-carrier 2 reducing material. That is to say, if during the pressing process the slide carriers 2, 2 ', 2 "are pivoted from their starting position into the pressing position, then the displaceable pressing element 4 performs a sliding movement along the receiving surface 3 of the corresponding press carrier 2.
- end press carriers 2, 2 ' which, in the initial position of the press device 1, define an opening between them, which is substantially closed in the pressed position.
- the slide carriers 2, 2 ', 2 are thus pivotable from a starting position into the pressing position, and the displaceable pressing element 4 slides during the pressing process with its outside 11 along the inside 12 of the associated press carrier 2, on which it is mounted at the end of the pressing process, the circular-segment-shaped print media 2, 2 ', 2 "and the circular segment-shaped press elements 4, 4', 4" each form a substantially closed circle.
- the entire pressing device 1, that is to say the pressing elements 4, 4 ', 4 ", in particular also the displaceable pressing element 4, as well as the stamping carriers 2, 2', 2" are formed completely from a ferrous material such as steel.
- the friction-reducing material is applied as a first friction-reducing layer 7 on the displaceable pressing member 4 and as a second friction-reducing layer 7 'on the associated press carrier 2.
- the friction-reducing layers 7, 7 ' are strip-shaped and each applied centrally on the bearing surface 5 of the displaceable pressing member 4 and on the receiving surface 3 of the associated press carrier 2 and extend in the circumferential direction along the entire Transverse to the circumferential direction, the bearing surface 5 and the receiving surface 3 each have a layer-free area.
- the friction-reducing material is thus arranged only in a partial range of about 70-80% on the pressing element or press carrier.
- the interaction region is thus formed here by the contact surface of the mutually impinging, friction-reducing layers 7, 7 'of the pressing element 4 and the press carrier 2.
- the pressing device 1 ' has a displaceable pressing element 4, which is formed entirely from the friction-reducing material.
- the remaining elements of the pressing device, so the non-displaceable pressing elements 4 ', 4 "and the carriage 2, 2', 2", are made of a tensile and pressure resistant material such as steel.
- the stamp carrier 2 has no friction-reducing material. Nevertheless, in such a completely formed from the friction-reducing material pressing member 4 is a friction reduction over the entire region of the interaction region, ie over the entire bearing surface 5 of the displaceable pressing member 4 and on the receiving surface 3 of the corresponding press carrier. 2
- the groove may have the cross section of a T-slot or a rectangular groove.
- the comb is shaped as a corresponding counterpart.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Claims (14)
- Dispositif de pressage (1, 1') pour la liaison par pressage de pièces de fabrication, en particulier en forme de tuyau, comprenant :au moins deux supports de pressage (2, 2', 2") reliés l'un à l'autre par articulation en direction circonférentielle, qui peuvent être pivotés l'un relatif à l'autre depuis une position de départ vers un position de pressage lors du processus de pressage, etau moins deux éléments de pressage (4, 4'. 4"), lesquels sont respectivement montés sur un des support de pressage (2, 2', 2") et présentent une surface de pressage (6, 6', 6") pour le pressage,où les supports de pressage (2, 2', 2") présentent une surface de réception (3,3',3") et où les éléments de pressage (4, 4'. 4") présentent une surface de montage (5, 5', 5"), où les éléments de pressage (4, 4', 4") reposent avec leur surface de montage (5, 5', 5") dans une zone d'interaction sur la surface de réception (3,3',3") des supports de pressage (2, 2', 2") et où la surface de montage (5, 5', 5"), ainsi que la surface de réception (3,3',3") sont réalisées de telle sorte qu'au moins un élément de pressage (4, 4'. 4") est monté de façon coulissante en direction circonférentielle sur le support de pressage (2, 2', 2"), caractérisé en ce que
l'élément de pressage (4, 4'. 4") et/ou le support de pressage (2, 2', 2") est réalisé au moins dans une zone partielle de la zone d'interaction avec un matériau réduisant la friction entre l'élément de pressage (4, 4'. 4") et le support de pressage (2, 2', 2"). - Dispositif de pressage (1, 1') selon la revendication 1, caractérisée en ceque la zone partielle occupe une surface de 10% à 90%, préférablement de 30% à 70% de la surface totale de la zone d'interaction, ouque la zone d'interaction entière est réalisée en matériau réduisant la friction.
- Dispositif de pressage (1, 1') selon la revendication 1 ou 2, caractérisé en ce que le matériau réduisant la friction est réalisé en tant que au moins une couche réduisant la friction (7, 7') sur l'élément de pressage coulissant (4) et/ou sur le support de pressage (2).
- Dispositif de pressage selon la revendication 3, caractérisé en ce que la couche est réalisée en tant que pièce intercalaire et est disposée dans un évidement correspondant dans l'élément de pressage coulissant et/ou le support du pressage; ou que la couche est réalisée en tant que revêtement sur l'élément de pressage et/ou le support de presse.
- Dispositif de pressage (1, 1') selon la revendication 3 ou 4, caractérisé en ceque le dit matériau réduisant la friction présente une résistance à la compression supérieure à 50 megapascal ;et/ouque l'élément de pressage (4, 4', 4") en particulier l'élément de pressage coulissant et/ou le support de pressage (2, 2', 2") présente une proportion de matériau contenant du fer, préférablement est réalisé entièrement en matériau contenant du fer comme par exemple l'acier.
- Dispositif de pressage (1) selon une des revendications 3 à 5, caractérisé en ceque la couche réduisant la friction s'étend sur toute la surface sur la zone d'interaction, ouque la couche réduisant la friction (7, 7') s'étend sur ladite zone partielle de la zone d'interaction et en particulier est disposée à l'emplacement où l'action de la pression est la plus haute.
- Dispositif de pressage (1) selon la revendication 3 à 6, caractérisé en ce que la couche réduisant la friction (7) est déposé sur l'élément de pressage (4) coulissant de manière centrique et s'étend en direction circonférentielle le long de la longueur entière de l'élément de pressage coulissant (4) et/ou que au moins deux couches réduisant la friction étant espacées l'une de l'autre sont disposées sur l'élément de pressage coulissant et s'étendent en travers de la direction circonférentielle le long de la largeur entière de l'élément de pressage coulissant.
- Dispositif de pressage (1) selon une des revendications 3 à 7, caractérisé en ce que la couche (7) réduisant la friction dépasse la surface (8) de l'élément de pressage coulissant (4).
- Dispositif de pressage (1') selon une des revendications 1 à 2, caractérisé en ce que l'élément de pressage coulissant (4) est réalisé entièrement en matériau réduisant la friction.
- Dispositif de pressage (1, 1') selon la revendication 9, caractérisé en ce que le dit matériau réduisant la friction présente une résistance à la compression supérieure à 750 megapascal.
- Dispositif de pressage selon une des revendications précédentes, caractérisé en ce que le matériau réduisant la friction comporte un ou plusieurs métaux et/ou des céramiques techniques et/ou résines synthétiques et/ou des composites à fibre.
- Dispositif de pressage (1, 1') selon une des revendications précédentes, caractérisé en ceque le dit matériau réduisant la friction, en particulier dans un état non lubrifié, présente un coefficient de frottement dynamique par rapport à l'acier lequel est inférieur à 0.4, préférablement inférieur à 0.3, en particulier préférablement inférieur à 0.25, et/ouque le dit matériau réduisant la friction, en particulier dans l'état non lubrifié, présente un coefficient de friction statique qui est inférieur à 0.5, préférablement inférieur à 0.4, plus préférablement inférieur à 0.35.
- Dispositif de pressage selon l'une des revendications précédentes, caractérisé en ce que sur la surface de montage de l'élément de pressage coulissant, au moins une crête est réalisée, et dans la surface de réception du support de pressage au moins une rainure est réalisée de sorte qu'une liaison crête- rainure peut être réalisée dans la zone d'interaction.
- Dispositif de pressage (1, 1') selon une des revendications précédentes, caractérisé en ceque le dispositif de pressage présente dans la position de départ une ouverture entre deux supports de pressage (2, 2') laquelle est sensiblement fermée dans la position de pressage, et/ouque les supports de pressage (2, 2', 2") peuvent être pivotés de telle sorte depuis une position de départ vers la position de pressage et l'élément de pressage coulissant (4, 4', 4") glisse de telle sorte le long du support de pressage (2, 2', 2") lors du processus de pressage, que à la fin de processus de pressage les supports de pressage (2, 2', 2") ainsi que les éléments de pressage (4, 4', 4") forment respectivement un cercle sensiblement fermé.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16171531.3A EP3248734B1 (fr) | 2016-05-26 | 2016-05-26 | Dispositif de presse a faible friction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16171531.3A EP3248734B1 (fr) | 2016-05-26 | 2016-05-26 | Dispositif de presse a faible friction |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3248734A1 EP3248734A1 (fr) | 2017-11-29 |
EP3248734B1 true EP3248734B1 (fr) | 2019-02-27 |
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EP16171531.3A Active EP3248734B1 (fr) | 2016-05-26 | 2016-05-26 | Dispositif de presse a faible friction |
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DE202005008126U1 (de) * | 2005-05-24 | 2006-10-05 | Herrle, Richard | Pressring |
EP2918354A1 (fr) * | 2014-03-11 | 2015-09-16 | Viega GmbH & Co. KG | Presse destinée à comprimer axialement des pièces à usiner |
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DE102009032113B4 (de) | 2009-07-08 | 2011-06-01 | Novopress Gmbh Pressen Und Presswerkzeuge & Co. Kg | Presswerkzeug sowie Verfahren zum Verpressen von insbesondere rohrförmigen Werkstücken |
DE102014115358A1 (de) * | 2014-10-22 | 2016-04-28 | Michael Schmitz | Presswerkzeug |
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DE202005008126U1 (de) * | 2005-05-24 | 2006-10-05 | Herrle, Richard | Pressring |
EP2918354A1 (fr) * | 2014-03-11 | 2015-09-16 | Viega GmbH & Co. KG | Presse destinée à comprimer axialement des pièces à usiner |
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