EP0846037B1 - Piece moule en poudre metallique et son procede de fabrication - Google Patents

Piece moule en poudre metallique et son procede de fabrication Download PDF

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Publication number
EP0846037B1
EP0846037B1 EP96928457A EP96928457A EP0846037B1 EP 0846037 B1 EP0846037 B1 EP 0846037B1 EP 96928457 A EP96928457 A EP 96928457A EP 96928457 A EP96928457 A EP 96928457A EP 0846037 B1 EP0846037 B1 EP 0846037B1
Authority
EP
European Patent Office
Prior art keywords
functional
retaining plate
functional surface
depressions
adhesive
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.)
Expired - Lifetime
Application number
EP96928457A
Other languages
German (de)
English (en)
Other versions
EP0846037A1 (fr
Inventor
Jürgen DÖNCH
Antonio Casellas
Günther GÖRTZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GKN Sinter Metals GmbH
Original Assignee
GKN Sinter Metals GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GKN Sinter Metals GmbH filed Critical GKN Sinter Metals GmbH
Publication of EP0846037A1 publication Critical patent/EP0846037A1/fr
Application granted granted Critical
Publication of EP0846037B1 publication Critical patent/EP0846037B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00

Definitions

  • the invention relates to a pressed from a metal powder and / or sintered mirror holding plate, which with at least is provided with a functional surface.
  • Moldings produced by the known method can be deburred by sintering after sintering. If by slide grinding when pressing the metal powder burrs are removed from the molded body, the undesirable side effect on that increases versus the ideal shape of the shaped body essentially by Surface grinding is removed while the indentations are in Shape of the pores are preserved. To the molded body with ridges to be provided, it would have to be blasted after surface grinding become. This would be done in an additional step depending on the abrasive and the impact speed of the abrasive on the surface of the molded body Surface structure can be achieved.
  • the disadvantage of one such a method is that by what cannot be influenced Impact of the abrasive on the surface of the Shaped body no defined structure can be achieved. Furthermore, the surface of the molded body does not or only has to a small extent the pores typical of sintered components, because these are struck by the abrasive.
  • the functional surface it has so far not been possible to use the functional surface to provide a surface structure on a molded body, which is optimally matched to the fact that the molded body is glued to another object. In the event of an overload the adhesive surface therefore often occurs between the adhesive material and the functional surface.
  • a similar behavior shows up when a coating is applied to the functional surface and then the coated molded body is glued to an object.
  • the separation often occurs due to an overload between the functional surface and the coating because the Surface structure of the functional surface is not optimal on the Use case can be coordinated.
  • a sintered metal body is known from FR-A-7 821 220, which is a smooth surface with a variety of irregular distributed depressions.
  • EP-A-0 424 109 shows a composite material made from a Aluminum alloy matrix reinforced by a porous metal is, the surface of the cylinder bore a Variety of irregularly distributed holes, grooves and depressions having.
  • the invention has for its object the above Avoid disadvantages and as inexpensively as possible to produce a shaped body, namely a mirror holding plate, the one tailored to the respective application has optimal surface structure of the functional surface.
  • a metal powder pressed and / or sintered mirror holding plate which are provided with at least one functional surface is the one through a variety of increases and / or Has depressions formed surface structure.
  • a Such mirror holding plate has the advantage that the functional surface, optimally trained depending on the desired application can be.
  • the functional surface is designed as an adhesive surface is.
  • the elevations and / or depressions of the Functional surface formed by a rough surface structure become. Because the functional surface has a rough surface structure the total surface of the functional surface compared to a smooth surface depending increased by the roughness. This results in that when applying an adhesive to the functional surface this accumulates along the elevations and / or depressions and because of the larger total surface between Adhesive and functional surface a much better adhesion of the adhesive on the functional surface guaranteed is. The same advantage arises if instead of one Adhesive a coating on the functional surface is applied.
  • the ridges and / or depressions face each other a given shape level a size between about 3 ⁇ m and about 3 mm.
  • the minimum roughness to be introduced is limited by the manufacturing technology Possibilities. While the minimum increases and / or The depressions are distributed rather irregularly and have a roughness depth represent, with increasing increases and / or deepening also regular structures such as grooves, Geometric patterns, characters and / or symbols are possible. The size of the roughness can vary depending on the functional Requirements of the use case and by the Manufacturing costs are determined.
  • the functional area can either increase and / or decrease have or correspond to a roughness depth Raises and / or depressions, the size of the design of grooves, geometric patterns, characters and / or symbols allows, or any combination of the above the entire width from about 3 ⁇ m to about 3 mm.
  • Font- and / or symbols can serve, for example, the molded body to be marked with the manufacturer's name, a type designation apply or a graphic element Design reasons. In the case of labeling, Type designation or graphic design can the elevations and / or depressions amount to about 3 mm also significantly exceed. It is also possible to use the Shaped body with a text and / or picture symbol indicate that for recycling purposes the for the mirror mounting plate used material is evident.
  • the surface structure is provided with a coating.
  • the coating provides surface protection and / or surface finishing achieved. Through surface protection layers can wear, corrosion or affects the strength properties of the base material become.
  • a surface finish lends products Metal additional properties, such as a higher one Resistance to corrosion and oxidation in many cases, however a decorative look.
  • Possible processes are: galvanic Processes such as electrolytic deposition without external current Deposition and hot dipping; Infusion; Sintering; thermal spraying, such as flame spraying, arc spraying, Plasma and detonation syringes; Cladding; Enamel; Phosphating and coating with organic or inorganic substances. Because of the on the functional surface applied surface structure is on the one hand improved adhesion between the coating and the functional surface given and on the other hand, the adhesive also adheres better on the coating, since this depends on the thickness Depicts surface structure of the functional surface.
  • the molded body is a mirror holding plate.
  • Mirror mounting plates are used, for example, in motor vehicles used and have a functional surface and a device to clip on the mirror.
  • the functional surface that can be glued to the glass pane of the motor vehicle can also be provided with a coating, for example can be made of enamel.
  • the surface structure The functional area comes with a variety of increases and / or depressions designed so that optimal gluing is guaranteed with the glass pane.
  • word characters and / or graphic elements for identification contained by the glass pane of are visible from the outside.
  • Elevations and / or depressions can be incorporated.
  • the ridges and / or depressions can be in the surface of the ram are incorporated so that when pressing of the metal powder, the surface structure accordingly the green compact is transferred.
  • Introducing the increases and / or depressions in the pressing of the metal powder is characterized in that the introduction of the surface structure on the functional surface with low energy consumption is possible because the shaped body in the form of the mirror holding plate its final strength is only obtained by sintering. It is also possible that the increases and / or Wells after sintering through a calibration process in the sintered component can be incorporated.
  • the functional surface 1 is a top view of the functional surface 1 Mirror mounting plate 2 shown.
  • the functional area 1 of the Mirror mounting plate 2 serves as an adhesive surface and is required around the mirror holding plate 2 by means of an adhesive on the Fasten the glass pane of a motor vehicle.
  • the adhesive surface has a net-like surface structure 3 on.
  • the net-like surface structure that is from a multiplicity of elevations 4 and / or depressions 5 has a larger surface area than one in contrast with a smooth surface.
  • the adhesive that is in the wells 5 can penetrate, guaranteed due to the larger Adhesive surface and interlocking in the recesses 5 a better one Adhesive power.
  • the mirror holding plate 2 shows a section through the mirror holding plate 2 along the line II-II in Fig. 1.
  • the mirror holding plate 2 has a fastening pin 6 with two opposite one another Undercuts 7 and two protruding on both sides Overlaps 8, which serves to turn the mirror on to fix the mirror mounting plate 2.
  • Fig. 3 shows the surface structure of the adhesive surface accordingly a detail A according to FIG. 1.
  • the elevations 4 and / or depressions 5 of the adhesive surface can be used when pressing the metal powder in a range from about 3 ⁇ m to about 3 mm become.
  • a press ram with one of the surface structures is used appropriate surface used.
  • the adhesive surface provided with a defined surface structure can also be subjected to surface finishing are made by processes such as enamelling, galvanic process or coating with organic or inorganic substances, whereby due to the increases 4 and / or depressions 5 a high adhesive power between the coating and mirror mounting plate 2 is guaranteed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)

Claims (7)

  1. Plaque de maintien (2) de miroir en poudre métallique pressée et frittée, qui est munie d'au moins une surface fonctionnelle (1) comportant une structure de surface définie constituée d'une multitude d'aspérités (4) et/ou de renfoncements (5).
  2. Plaque de maintien (2) de miroir selon la revendication 1, caractérisée en ce que la surface fonctionnelle est agencée en tant que surface d'encollage.
  3. Plaque de maintien (2) de miroir selon la revendication 1 ou 2, caractérisée en ce que les aspérités (4) et/ou les renfoncements (5) de la surface fonctionnelle (1) sont constitués d'une structure de surface rugueuse.
  4. Plaque de maintien (2) de miroir selon l'une quelconque des revendications 1 à 3, caractérisée en ce que, par rapport à un plan de base (11) prédéfini, les aspérités (4) et/ou les renfoncements (5) ont une dimension comprise entre 3 µm environ et 3 mm environ.
  5. Plaque de maintien (2) de miroir selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la structure de surface est munie d'un revêtement.
  6. Procédé destiné à la fabrication d'une plaque de maintien (2) de miroir en poudre métallique selon l'une quelconque des revendications 1 à 5 fabriquée par pressage et frittage, qui est munie d'au moins une surface fonctionnelle (1), caractérisé en ce que, lors du pressage et/ou après le frittage, une structure de surface définie est pratiquée sous forme d'aspérités (4) et/ou de renfoncements (5) dans la surface de la surface fonctionnelle (1).
  7. Procédé destiné à la fabrication d'une plaque de maintien (2) de miroir selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les aspérités (4) et/ou les renfoncements (5) sont pratiqués après le frittage par un processus de calibrage.
EP96928457A 1995-08-23 1996-08-13 Piece moule en poudre metallique et son procede de fabrication Expired - Lifetime EP0846037B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19531077 1995-08-23
DE19531077A DE19531077A1 (de) 1995-08-23 1995-08-23 Bauteil mit einer zumindest in Teilbereichen seiner Oberfläche erhöhten Rauheit für eine Preßverbindung mit einem Bauelement sowie Verfahren zu seiner Herstellung als Sinterteil aus Metallpulver
PCT/EP1996/003573 WO1997007916A1 (fr) 1995-08-23 1996-08-13 Piece moule en poudre metallique et son procede de fabrication

Publications (2)

Publication Number Publication Date
EP0846037A1 EP0846037A1 (fr) 1998-06-10
EP0846037B1 true EP0846037B1 (fr) 2001-02-28

Family

ID=7770230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96928457A Expired - Lifetime EP0846037B1 (fr) 1995-08-23 1996-08-13 Piece moule en poudre metallique et son procede de fabrication

Country Status (4)

Country Link
EP (1) EP0846037B1 (fr)
DE (2) DE19531077A1 (fr)
ES (1) ES2155619T3 (fr)
WO (1) WO1997007916A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005062522C5 (de) * 2005-12-19 2019-04-04 Gehring Technologies Gmbh Verfahren zur kraftschlüssigen Verbindung der Stirnflächen zweier Maschinenbauteile zur Übertragung hoher Drehmomente oder Querkräfte
DE202005022109U1 (de) 2005-12-19 2014-01-09 Gehring Technologies Gmbh Kraftschlüssige Verbindung der Stirnflächen zweier Maschinenteile
DE102007016643A1 (de) 2007-04-05 2008-10-09 Geislinger Gmbh Kraftschlüssige Spannverbindung und Verfahren zu deren Herstellung
DE102012214271B4 (de) * 2012-08-10 2014-08-07 Aktiebolaget Skf Maschinenanordnung und Verfahren zu ihrer Herstellung
DE102016204425A1 (de) 2016-03-17 2017-09-21 Schaeffler Technologies AG & Co. KG Nockenwellenversteller
FR3091915B1 (fr) * 2019-01-17 2023-01-06 Renault Sas « Pièce métallique pour un moteur à combustion interne et ensemble comportant une telle pièce »

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1576143A (en) * 1977-07-20 1980-10-01 Brico Eng Sintered metal articles
DE3736661C1 (de) * 1987-10-29 1988-07-21 Mtu Muenchen Gmbh Verfahren zur Herstellung von Schichten
EP0424109A3 (en) * 1989-10-18 1991-10-02 Izumi Industries Ltd. Aluminium alloy matrix composite for internal combustion engines

Also Published As

Publication number Publication date
WO1997007916A1 (fr) 1997-03-06
DE19531077A1 (de) 1997-02-27
DE59606522D1 (de) 2001-04-05
EP0846037A1 (fr) 1998-06-10
ES2155619T3 (es) 2001-05-16

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