Freni Brembo S.p.a.

Brembo S.p.a.

Fuji Corporation

Brembo North America, Inc.

Fabiano Carminati

Roberto Lavezzi

Simone Biondo

Paolo Vavassori

Stefano Medici

Giovanni Mario Tironi

Nino Ronchi

Gianluigi Maronati

Lorenzo Cavalli

Kevin M Thompson

Laura Sammarelli

Mark B Olson

Lorenzo Cavagna

Antonio Quarti

Sheldon Wylie

Christopher Stoick

Colin Martin

Salvatore Giammarinaro

Mitsuhiro Yokota

Marco Nervosi

Enrico Ghirardelli

Federico Bertasi

Alessandro Mancini

Bozena Dudzik

Mariusz Bieronski

Mariusz Bozynski

Mattia Tombolan

Giuseppe Domenghini

The invention consists of a gray cast iron comprising carbon, silicon, vanadium, manganese, nickel, chromium, molybdenum, copper, sulfur, phosphorous, tin and titanium, wherein: the percentage by weight of carbon is from 3.70 to 3.90%; the percentage by weight of silicon is from 1.30 to 2.10%; the percentage by weight of vanadium is from 0.10 to 0.15%; the percentage by weight of manganese is from 0.60 to 0.90%; the percentage by weight of nickel is from 0.05 to 0.50%; the percentage by weight of chromium is from 0.20 to 0.35%; the percentage by weight of molybdenum is no more than 0.10%; the percentage by weight of copper is no more than 0.35%; the percentage by weight of sulfur is less than 0.10%; the percentage by weight of phosphorous is less than 0.10%; the percentage by weight of tin is less than 0.10%; the percentage by weight of titanium is no more than 0.01%; the remainder by weight being iron.

Cast iron, in particular for components of disc brakes

A braking band having an annular band body arranged around a rotation axis and made of one of gray cast iron, steel, aluminum or alloys thereof, has at least one braking surface having an activated band body portion for increasing adhesive capacity of at least one protective surface coating placed on the surface of the activated band body portion and having at least one material with elevated resistance to abrasion. The activated band body portion is arranged on the surface of the annular band body to form an outermost layer of the braking band with the at least one protective surface coating and has a rough profile having at least one channel delimited by at least one pair of projections, extending along a path at least partially surrounding the rotation axis and having a channel bottom and a first channel side forming an acute angle with the channel bottom and an opposite second channel side forming an obtuse angle with the channel bottom.

Braking band of a disk for disk brake

A method for making a brake disc may include the following steps: a) preparing a brake disc having a braking band provided with two opposite braking surfaces, (b) subjecting at least one of the braking surfaces to a working process adapted to increase the surface roughness thereof; c) nitrocarburizing the braking surface with increased surface roughness to obtain on the surface a nitrocarburized surface layer; (d) depositing on the nitrocarburized surface layer a material in particle form having: &#x2014;Cr3C2 and NiCr, or &#x2014;NiCr, Fe, Mo, Co, Mn and Al, which forms a base protective coating; and e) depositing on the base protective coating a material in particle form consisting of WC, Fe, Cr and Al, thus forming a surface protective coating of WC and Fe, Cr and Al.

Method of making a brake disc and brake disc for a disc brake

A method for making a brake disc may include providing a disc brake with a braking band and depositing on the disc a layer of chromium carbide and nickel-chromium in particle form to form a base protective coating. The method may also include depositing on the base protective coating a material in particle form consisting of tungsten carbide, iron, chromium and aluminium to form a surface protective coating made of tungsten carbide, iron, chromium and aluminium. Both protective coatings may be made by High Velocity Oxygen Fuel or High Velocity Air Fuel or Kinetic Metallization techniques.

Method for making a brake disc and brake disc for disc brake

A braking band of a disk brake disk has a first plate and a second plate arranged joined to each other by connecting elements. The first and second plates have first and second plate outer surfaces, opposite portions of the first and second outer surfaces forming opposite braking surfaces. The braking band has a plurality of attachment portions for connecting the braking band to a vehicle hub or a bell. Each attachment portion has a connection seat. The attachment portions are spaced by recesses. Each attachment portion has an attachment portion wall having opposite side wall portions, two bottom wall portions and an inner end wall portion, and opposite first and second attachment portion surfaces. Each recess extends radially beyond the connection seat. Each side wall portion is joined to the adjoining bottom wall portion by a cylindrical bottom arch avoiding edges. Each side wall portion is joined to the adjoining inner end wall portion by a cylindrical end arch avoiding edges. Each first attachment portion surface is coplanar to the first braking surface except for the wear of the first braking surface.

Braking band of a disk for a disk brake of the ventilated type

Some pin elements may have a substantially circular cross section, forming a circumference-shaped edge. Other pin elements may have a substantially rhomboidal cross section, forming a symmetric rhombus-shaped edge with respect to a radial direction and a circumferential direction orthogonal to this radial direction. Yet other pin elements may have a substantially circular cross section, forming a circumference-shaped edge.

Braking band of a disc for disc brake of ventilated type

A disc has a braking band, a bell and elastic elements. The braking band has a plurality of radial teeth projecting from a radially internal edge portion, delimiting a plurality of band seats. Each radial tooth has a radially internal edge surface, a first and a second axial tooth side, and at least one circumferential side. A plurality of axial teeth project delimiting a plurality of bell seats. The plurality of radial teeth is housed in the plurality of bell seats. The internal bell surface is aligned with the radially internal edge surface of each radial tooth. Each elastic element is removably connected to the axial teeth and embraces a portion of first and second axial tooth sides and of circumferential side of the radial teeth of the braking band, elastically preloading the radial teeth with respect to the bell.

Brake disc for a disc brake and method

A disc brake disc with a parking brake cylindrical surface for cooperating with shoes of a parking brake comprises a braking band comprising opposite braking surfaces and a geometric connection portion of band connecting the braking band to a bell; the bell comprising a connection plate with a wheel hub and an annular geometric connection portion of bell for geometric connection of the bell to the geometric connection portion of band; the braking band and the bell being pieces separate from each other and geometrically coupled to each other by geometric connection portions of band and bell so as to transfer a braking action by a brake caliper on the opposite braking surfaces from the braking band to the bell and to the wheel hub; the bell comprising a geometric bell connection surface opposite to said braking band. The disc brake disc further comprises a parking ring comprising radially and internally an inner portion of ring, and radially and externally a geometric ring connection portion.

Disc brake disc with parking brake cylindrical surface

Disc brake

A method for manufacturing a brake disc may have the following operating steps: a) preparing a brake disc, with a braking band and provided with two mutually opposite braking surfaces; b) depositing on the disc a layer of chromium carbide (Cr3C2) and nickel-chromium (NiCr) in particulate form forming a base protective coating; and c) depositing over the base protective coating a material in particulate form with the tungsten carbide (WC) and cobalt (Co) forming a surface protective coating. Both protective coatings are created with HVOF (High Velocity Oxygen Fuel), HVAF (High Velocity Air Fuel) or KM (Kinetic Metallisation) technique.

Method for manufacturing a brake disc and brake disc for disc brakes

A manufacturing method of a brake disc, comprising the steps of: processing a rotor Sto acquire the rotor made of the approximately annular plate material with a center hole, the opening edge of said center hole having a plurality of projections projecting inwardly; processing a bracket Sto acquire a bracket made of a tubular member, in which openings corresponding to the projections are formed; and integrating the bracket Swith the rotor by inserting the bracket through the center hole of the rotor acquired by the rotor processing step and fitting the projections of the rotor into the openings of the bracket, along with a disc brake acquired according to the manufacturing method of the brake disc.

Brake disc and the manufacturing method thereof

A braking band () of a disc for a disc brake () suitable to rotate about a rotation axis (A-A), said braking band comprising opposite annular braking surfaces () which extend from an inner edge () facing towards the rotation axis (A-A) to an outer edge () facing towards the outside of the disc, said braking band () having a distribution of grooves () on at least one of the braking surfaces (), said distribution, or distribution assembly of grooves, having a pattern or module () which is repeated circumferentially, each of said grooves () being a closed groove which extends in a main direction of extension () which defines a direction () of said groove, each groove further extending without intersecting other grooves, said module () extends from an inner radius (r) to an outer radius (r), said radii defining an annular portion of said braking surface having said grooves, said module () comprising a first groove (and/or), which extends without interruption substantially from said inner radius (r) to said outer radius (r), as well as at least a second (and/or) and a third groove (and/or) with lesser extensions than said first groove (), said first, second and third grooves (and/or) of the same module (or) have extensions parallel to one another, wherein said second groove (and/or) has a greater extension than said third groove (and/or), and wherein said at least first, second and third grooves (and/or) are positioned alongside one another and said second groove (and/or) is positioned between said first groove (and/or) and said third groove (and/or), and wherein the extension of said first groove is suitable to affect the entire area touched by at least one brake pad () suitable to act in conjunction with said annular braking surface (and/or) to exert a braking action, and wherein at any point in the direction of extension of each groove, said direction of extension (), or its rectilinear prolongation, forms an acute angle with respect to a radial direction (R-R) or a prolongation of the inner radius (r) or of the outer radius (r).

Braking band of a disc for a disc brake

Growing community of inventors

Curno, Italy

Fabiano Carminati