EP0428517A1 - Dispositif de frein a disque pour automobiles, disque de frein et machoire de frein prevus a cet effet et leurs procedes de fabrication - Google Patents

Dispositif de frein a disque pour automobiles, disque de frein et machoire de frein prevus a cet effet et leurs procedes de fabrication

Info

Publication number
EP0428517A1
EP0428517A1 EP19890904785 EP89904785A EP0428517A1 EP 0428517 A1 EP0428517 A1 EP 0428517A1 EP 19890904785 EP19890904785 EP 19890904785 EP 89904785 A EP89904785 A EP 89904785A EP 0428517 A1 EP0428517 A1 EP 0428517A1
Authority
EP
European Patent Office
Prior art keywords
brake
wearing
brake disc
cast
disc
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.)
Withdrawn
Application number
EP19890904785
Other languages
German (de)
English (en)
Inventor
Preben Stolberg
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.)
De Forenede Jernstoeberier AS
Original Assignee
De Forenede Jernstoeberier AS
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 De Forenede Jernstoeberier AS filed Critical De Forenede Jernstoeberier AS
Publication of EP0428517A1 publication Critical patent/EP0428517A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes
    • F16D65/127—Discs; Drums for disc brakes characterised by properties of the disc surface; Discs lined with friction material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/78—Features relating to cooling
    • F16D65/84—Features relating to cooling for disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • F16D69/027—Compositions based on metals or inorganic oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/1304—Structure
    • F16D2065/132—Structure layered
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/0491—Tools, machines, processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0007—Casting

Definitions

  • the invention relates to a disc brake device for automobiles and similar vehicles comprising a brake disc co-rotating with a motor-car wheel and brake blocs arranged at either side of the brake disc close to its periphery and each consisting of a rear plate and a wearing part facing the brake disc, said brake blocs being accommodated in a caliper device in such a manner as to be displaceable in the axial direction of the brake disc towards each other under the influence of a brake pressure power for braking engagement with the brake disc, each brake bloc being retain, when unloaded, at a distance from the brake disc by means of a return spring force.
  • the invention provides a disc brake device of the above type which is characterized in that the brake disc is designed as a central, substantially disc-shaped castiron body with a hub portion integral with a surrounding peripheral edge portion, the opposite lateral faces of which are cast together with comparatively thin wearing linings having a metallic surface layer with considerably increased wearability, said wearing linings having a radial width equal to or larger than the extension of the wearing parts of the brake blocs parallel to the brake disc, the wearing part of each brake bloc consisting of a cast-iron component made from an alloy of increased wearability cast together with, the rear plate formed as a steel blank.
  • brake discs and brake blocs may be manufactured by mass production at comparatively low costs.
  • brake discs and brake blocs for the disc brake device according to the invention may be manufactured entirely independently of each other as separate components the invention further relates to a brake disc and a brake bloc that are characterized by the features specified in the following claims 2 and 8, respectively.
  • the wearing linings are designed as wearing plates composed of supporting parts of comparatively thin sheet material, on the one side 30 of which said metallic surface layer is provided by spray forming-
  • said forming technology that is of comparatively recent date and still under development entails that a melt of metal, alloy or a metal-based composite is subjected to atomization in an inactive protective gas atmosphere, whereby a cloud or cone of atomized liquid particles is directed towards and made to impinge on a generally metallic substrate at high rate. At the collision with the relatively colder substrate surface the particles flatten out and solidify instantaneously, thereby providing a coherent deposit on the substrate.
  • the deposited material may in a later step be separated from the substrate for optional further processing, e.g. drop forging.
  • the deposited material may also remain permanently bonded to the substrate.
  • the material deposited by the atomization may be of an arbitrary composition, in that it is also possible, inter alia, to apply additives, e.g. by injection of powdered additives to the atomization cloud or cone.
  • the surface layers of the wearing plates are provided by spray forming; of a material containing aluminium oxide as its main component.
  • the wear-resistant surface layer is applied to a wearing plate supporting part of comparatively thin sheet material, preferably steel plate.
  • the invention provides a method based on the prior art disclosed, e.g. in DK patent No. 87,462, according to which the casting is carried out in disposable moulds consisting of compressed sand or similarly formable material, whereby a number of uniform mould parts are formed in a successively pressing chamber between a pressing plate and a counter plate provided with one or more pairs of oppositely directed model parts and are sectionwise successively arranged following their manufacture to form a series of consecutive moulds ready for use.
  • this method is characterized in that the wearing linings of each brake disc are made as separate elements fixed in predetermined mutual positons and inserted as a core element in the pouring cavity part at one side of each mould part, filling ducts for casting material being provided in both sides of each mould part.
  • the wearing linings designed as separate elements are preferably made as wearing plates by applying to a supporting part of comparatively thin sheet material a metallic surface layer with strongly enhanced wearability by spray forming (the Osprey-process).
  • the invention provides a method based on the same casting technique known per se, which with a view to ensuring a reliable connection between the rear plate of each brake bloc and its wearing part is characterized in that the rear plate of each brake bloc is inserted as a core element at one side of each mould part opposite a pouring cavity for the wearing part of the brake bloc formed in the opposite side of the mould part, the casting material being consituted by a castiron alloy with increased wearability and being filled into the cavity at a temperature at which it fuses with a surface zone at the side of the rear plate facing the pouring cavity.
  • Fig. 1 is a partially sectional view of the main components of a disc brake device according to the invention.
  • Fig. 2 is a perspective view of a ventilated embodiment of a brake disc
  • Fig. 3 is a schematical illustration of an automatic casting plant of the type known per se from DK patent No. 87,162,
  • Fig. 4 is a sectional view of a mould part for use in the manufacturing of brake discs on a plant as shown in Fig. 3
  • Fig. 5 is an enlarged section of Fig. 4 with a core element embedded in the pouring cavity for use in the manufacturing of a brake disc as shown in Fig. 2,
  • Fig. 6 is a schematical illustration of the manufacturing of wearing plates for the brake disc according to the "Osprey"-technology
  • Fig. 7 is a sectional view of a mould part for use in the manufacturing of brake blocs.
  • Fig. 8 is a plan view of the left side of the mould part in Fig. 5.
  • brake disc 1 which in the usual way is coaxially mounted with respect to a vehicle wheel, not shown, and co-rotates therewith consists of a central, mainly disc-shaped cast-iron body 2 having a hub portion 3 integral with a surrounding peripheral edge portion 4 the lateral faces of which according to the invention are cast together with comparatively thin wearing linings 5 coated with a surface layer 6 of substantially increased wearability.
  • Two uniform brake blocs 7 are mounted in a caliper device of known design at either side of the edge portion 4 of the brake disc 2 so as to be displaceable towards each other under the influence of the brake pressure power P in the axial direction of disc 1 for braking engament with the wearing linings 5 whose radial width is preferably a little larger than the extension of the brake blocs 7 parallel to the plane of disc 1.
  • the central body 2 of brake disc l may be made from a traditional cast-iron alloy, e.g. GG20.
  • the wearing linings 5 of the brake disc 2 are formed as separate wearing plates, actually consisting of a supporting part that may be a steel plate or a cast-iron plate and on one side of which the wear-resistant surface layer 6 has been provided by spray forming by application of the "Osprey"-technology explained in the following.
  • the wearing plates 5 are permanently and solidly fastened to the cast-iron disc 2 by casting in accordance with the method specified in the following.
  • a brake disc according to the invention may be made in a ventilated design in that from a central cavity, not shown in the figure, in hub portion 3 a considerable number of radial ventilation ducts 10 extend through the edge portion 41 of the cast-iron disc to the periphery of the brake disc.
  • Each of the brake blocs consists of a rear plate 8 of commercially available normal steel, e.g. steel 37, and a wearing part 9 cast therewith which according to the invention is made from a cast-iron alloy, e.g. GG20, whose wearability has been increased, e.g. in that the alloy has a phosphoric content of at least 1% .
  • the two elements are preferably cast together during the manufacturing as will be described in the folowing.
  • the brake disc may be provided with wearing linings having a surface layer of such a composition and structure as to obtain desired specified friction properties, e.g. so that during braking a sliding friction occurs between the wearing linings 5, 6 of brake disc 1 and the wearing parts 9 of brake blocs 7, this being particularly advantageously when using the disc brake device according to the invention in anti-blocking brake systems.
  • the manufacture of the brake disc as well as the brake blocs for a disc brake device according to the invention is preferably carried out according to the mould producing and casting technique disclosed, inter alia, in DK patent 87,162 by using an automatic casting plant structured as schematically illustrated in Fig. 3.
  • the casting operation is effected in disposable moulds formed in the interfaces between a number of consecutive uniform mould parts 11 successively pro ⁇
  • a pressing plate 13 that is reciprocating, e.g. by hydraulic actuation, and a counter plate 14 that may be swung 90° from the position shown in solid lines in the figure, in which it forms a wall in the pressing chamber 12, to the position 14 illustrated in dotted lines, in which a completed mould part 11 may pass under the plate and be pushed against the pile of already manufactured mould parts 11.
  • Pouring cavities 15 and filling ducts 16 are formed by arranging model parts 17 and 18, resp., on the pressing plate 13 and/or on the counter plate 14.
  • the mould production and the filling of liquid casting material as well as the solidification thereof and the successive separation of mould parts 11 and the removal of the completed cast members are automatically controlled and supervised at a very high capacity of production, the production of one mould part lasting typically about 10 sees.
  • the wearing linings 5 of each brake disc that are designed as separate pre-fabricated elements are inserted in predetermined mutual positions as illustrated in Fig. 4, as a core element in a pouring cavity part 15 at one side of each mould part 11a, while filling ducts 16a and 17a are formed at either side of the mould part 11a.
  • a core element 116 of compressed sand and containing an adhesive combustible during the casting process is inserted in the pouring cavity 115.
  • Wearing linings 105 are fixed in predetermined positions at either side of the core element 116 by means of spacers extending therethrough, e.g. in the form of pins 117 which by the casting process are cast into the cast-iron body of the brake disc.
  • FIG. 6 illustrates the production of wearing linings for the brake disc by spray forming, using the so-called "Osprey"-technology.
  • a furnace 20 contains a melt 21 of metallic material, in the actual case mainly aluminium oxide.
  • the metallic melt is passed to an atomizer 22 in which by introduction of an inactive gas, e.g. nitrogen, at a high pressure an atomization of liquid particles of the melt is generated.
  • the atomized material in the protective atmosphere provided by the inactive gas is directed in a conical cloud 23 towards a substrate 24 passed through the otherwise closed atomization forming chamber on a belt conveyor 25.
  • the substrate 24 acting as supporting part of each wearing lining is preferably made from steel plate. The final achievement of wearing linings may then be accomplished by punching from the substrate plate 24.
  • the thickness of the surface coating 26 may be quite small, e.g. in the range of 50 to 100 ⁇ , while the thickness of the substrate in dependence on the material may for instance be about 2 mms.
  • rear plate 8 made from steel is, as shown in Fig. 7, in a similar way inserted as the core element at one side of the mould part lib so as to face a pouring cavity 15b with associated filling duct 16b provided at the opposite side of the mould part.
  • the rear plate 8 and the wearing part 9 are only connected in a plane it is essential in the production of brake blocs to ensure that the casting is carried out at a temperature at which an actual fusing together is effected of the cast-iron alloy and a surface zone of the rear plate 8 is effected, e.g. by carburizing a surface zone having a thickness of at least 0.5 mms.
  • the surface of the rear plate 8 may according to the invention be processed prior to being inserted as a core element, e.g. by the so-called jet whipping, thereby making the surface to open by impingement of small steel balls or the like.
  • rear plates for a considerable number of brake blocs may be inserted and pouring cavities with associated filling ducts may be provided in the same mould part, thereby enhancing the production capacity.
  • a corresponding capacity increase may be effected in the prodcution of brake discs.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Braking Arrangements (AREA)

Abstract

On a mis au point un dispositif de frein à disque sans amiante pour automobiles et véhicules similaires, dont le disque de frein (1) comprend un corps central (12) en fonte de fer comportant une partie de moyeu (3) solidaire avec une partie de bord (4) périphérique, dont les faces latérales opposées sont coulées avec des garnitures d'usure (5) dotées d'une couche de surface métallique (6) à résistance à l'usure considérablement accrue, tandis que chacun des sabots de frein (7) se compose d'une plaque arrière (8) en acier, coulée d'une pièce avec une partie d'usure (9) en alliage en fonte de fer ayant une meilleure résistance à l'usure. Dans la fabrication de disques de frein (1) et de sabots de frein (4) on insère les garnitures d'usure des disques de frein (1) en plaques d'usure séparées, et les plaques arrière (8) des sabots de frein se présentant sous la forme d'éléments centraux, respectivement, sur un côté de parties de moulage uniformes en sable comprimé, afin de former des moules de coulage jetables empilés en ligne dans une installation de coulage à commande automatique. On peut fabriquer les garnitures d'usure (5) des disques de frein à couches de surface résistant à l'usure par pulvérisation à l'aide de la technologie ''Osprey''.
EP19890904785 1988-04-07 1989-04-07 Dispositif de frein a disque pour automobiles, disque de frein et machoire de frein prevus a cet effet et leurs procedes de fabrication Withdrawn EP0428517A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK1891/88 1988-04-07
DK189188A DK189188D0 (da) 1988-04-07 1988-04-07 Skrivebremseindretning til automobiler, bremseskive og bremseklods dertil samt fremgangsmaade til fremstilling af disse

Publications (1)

Publication Number Publication Date
EP0428517A1 true EP0428517A1 (fr) 1991-05-29

Family

ID=8108850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890904785 Withdrawn EP0428517A1 (fr) 1988-04-07 1989-04-07 Dispositif de frein a disque pour automobiles, disque de frein et machoire de frein prevus a cet effet et leurs procedes de fabrication

Country Status (5)

Country Link
EP (1) EP0428517A1 (fr)
JP (1) JPH03504754A (fr)
AU (1) AU3530789A (fr)
DK (1) DK189188D0 (fr)
WO (1) WO1989009889A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK7790D0 (da) * 1990-01-11 1990-01-11 Forenede Jernstoeberier A S De Bremseskiver til automobiler og fremgangsmaader til deres fremstilling
JPH0774079B2 (ja) * 1991-10-31 1995-08-09 象印チエンブロック株式会社 捲上、牽引機用メカニカルブレーキ
DE69407291T2 (de) * 1993-06-30 1998-04-23 Kelsey Hayes Co Aus verbundwerkstoff hergestellte bremsscheibe sowie verfahren zu deren herstellung
US5620042A (en) * 1993-06-30 1997-04-15 Kelsey-Hayes Company Method of casting a composite disc brake rotor
DE19532019C1 (de) * 1995-08-31 1997-02-13 Ae Goetze Gmbh Trägerplatte für Reibbeläge
DE10056161A1 (de) 2000-11-13 2002-05-29 Knorr Bremse Systeme Bremsscheibe und Verfahren zu deren Herstellung
EP1258647B1 (fr) * 2001-05-15 2012-02-15 Volkswagen AG Disque de frein pour véhicule et son procédé de fabrication
DE102005031291A1 (de) * 2005-07-05 2007-01-11 Daimlerchrysler Ag Verbundbremsscheibe
DE102008060915A1 (de) 2008-12-06 2010-06-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Gießverfahren zum Herstellen einer Bremsscheibe; Bremsscheibe
DE102009049875A1 (de) * 2009-10-19 2011-05-12 Daimler Ag Bremsscheibe mit einem ringförmigen Reibkörper und Verfahren zum Herstellen des Reibkörpers
DE102009059806A1 (de) * 2009-12-21 2011-06-01 Daimler Ag Leichtbauverbundbremsscheibe und deren Herstellung
DE102010035646B3 (de) * 2010-08-27 2011-12-15 Daimler Ag Verfahren zum Herstellen einer Bremsscheibe sowie Bremsscheibefür eine Scheibenbremse eines Kraftwagens
DE102013213790A1 (de) * 2013-07-15 2015-06-11 Ford Global Technologies, Llc Verfahren zur Herstellung einer Bremsscheibe sowie Bremsscheibe
DE102017210021B4 (de) * 2017-06-14 2019-03-07 Continental Teves Ag & Co. Ohg Leichtbaukompositbremsrotor für eine Kraftfahrzeugscheibenbremse

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Publication number Priority date Publication date Assignee Title
DE1217225B (de) * 1963-05-16 1966-05-18 Vyzk Ustav Prislusenstvi Motor Teilbelagscheibenbremse fuer Raeder von Kraftfahrzeugen
DE1530576A1 (de) * 1965-05-28 1969-09-11 Daimler Benz Ag Scheibenbremse fuer Fahrzeuge
FR1575746A (fr) * 1968-04-26 1969-07-25
DE2002437A1 (de) * 1970-01-21 1971-07-29 Teves Gmbh Alfred Bremsscheibe
GB1323832A (en) * 1970-07-03 1973-07-18 Daimler Benz Ag Disc elements for disc brakes
DE2201885A1 (de) * 1972-01-15 1973-08-16 Porsche Kg Bremsscheibe fuer scheibenbremsanlagen in kraftfahrzeugen
FR2366157A1 (fr) * 1976-09-30 1978-04-28 Abex Pagid Equip Dispositif d'ancrage de garnitures de friction sur des plaquettes de support pour freins a disque
FR2538277B1 (fr) * 1982-12-23 1985-09-13 Kuhn Sa Procede de moulage d'un rotor de frein a couronne et rotor de frein a couronne obtenu par ce procede

Non-Patent Citations (1)

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Title
See references of WO8909889A1 *

Also Published As

Publication number Publication date
AU3530789A (en) 1989-11-03
DK189188D0 (da) 1988-04-07
JPH03504754A (ja) 1991-10-17
WO1989009889A1 (fr) 1989-10-19

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