A composite brake disc connecting assembly and a composite brake disc. The composite brake disc connecting assembly includes a sleeve (1) and a spring member (2); wherein the sleeve (1) includes an upper pressing plate (101), a lower pressing plate (102) and a connecting column (103); a connecting hole (104) is provided at the center of the connecting column (103), and a pair of U-shaped clamping slots are formed between the upper pressing plate (101), the lower pressing plate (102) and the connecting column (103); and the spring member (2) includes a pair of elastic pieces and a connecting bridge (201). The composite brake disc includes a brake disc hat (4), a friction ring (5) and a plurality of composite brake disc connecting assemblies; wherein the brake disc hat (4) is provided with disc hat notches (401) for mounting spring members (2), the friction ring (5) is provided with mounting holes (505) for accommodating connecting columns (103), and the friction ring (5) is connected to the brake disc hat (4) by fasteners (3) inserted onto the connecting columns (103). The composite brake disc has a simple structure, the friction ring (5) can move radially, reducing the deformation amount of the friction ring and preventing brake judder; the whole assembly process is simple, the number of parts is small, the production cost is reduced, and the sources causing variation during the process are reduced.

There is provided a method for producing a wet friction plate that can improve the retention property of lubricating oils in a fine groove formed by laser light. In a method for producing a wet friction plate (200), a friction material (210) is produced by sheet making processing in a first step. Thereafter, in a second step, a fine groove (211) is formed on the friction material (210). The friction material (210) is produced such that thermosetting resin therein is in a semi-cured state. The cross-sectional shape of the fine groove (211) is formed into a V shape by laser light. Subsequently, in a third step, the friction material (210) is disposed on a core metal (201) via an adhesive agent including thermosetting resin. Subsequently, in a fourth step, the friction material (210) is pressed while heated to crush the fine groove (211). In this manner, unevenness is formed on an intra-groove surface (212), and the thermosetting resin is completely cured.

A brake disc for a friction brake of a transportation vehicle includes a friction portion having at least one friction surface and a fastening portion for fastening to the transportation vehicle, wherein the friction portion and the fastening portion are formed on a base body of gray cast iron or steel, and an anti-wear layer is applied to the friction portion as the friction surface by laser deposition welding. The anti-wear layer on the base body is continued beyond the friction surface into a region that is angled relative to the friction surface, and ends in that region, and is applied in the angled region of the base body with full coverage and without any gaps to the base body. Surface portions outside of the friction surface are provided with an anti-corrosion layer which overlaps the anti-wear layer in the angled region.

A brake assembly and a method for manufacturing a brake assembly are provided. The brake assembly includes a brake pad affixed to a substrate. The brake pad extends from the substrate to a brake pad friction surface, and includes abradable cellular metal foam with the hardened ceramic particles.

Method and plant for manufacturing braking elements such as vehicle brake pads. The plant can comprise a first station that applies an adhesive to a first face of a metallic element; a second station that applies to the first face of the metallic element a block of friction material; a checking station that verifies the presence of the adhesive by detecting the gray level of a plurality of points of at least one zone of the first face; and a processing unit that compares the gray level detected for each point with a first threshold value, counts the number of points that have a gray level that satisfies a relationship (which is a function of the threshold value,) and compares such a value with a second threshold value to discard those metallic elements for which the percentage calculated does not correspond to the second threshold value.

The application relates to a brake pad assembly for a disk brake system and to a disk brake system. The proposed brake pad assembly for a disk brake system comprises a back plate having a front side for facing a brake disk of the disk brake system and a back side. The brake pad assembly further comprises a friction layer arranged at the front side of the back plate for contacting a friction surface the brake disk. The back plate comprises a back plate body having a recess on its back side. The back plate further comprises a layered structure that is received within the recess of the back plate body. The layered structure comprises a copper layer and a rubber layer. The rubber layer covers the copper layer.

A friction material composition includes a binder, organic filler, inorganic filler and fiber reinforcement, and does not contain copper or contains copper in an amount of 0.5 mass % or less. The inorganic filler is one or more selected from y alumina having an average particle size of 10 nm to 50 μm, dolomite having an average particle size of 1 to 20 μm, calcium carbonate having an average particle size of 1 to 20 μm, magnesium carbonate having an average particle size of 1 to 20 μm, manganese dioxide having an average particle size of 1 to 20 μm, zinc oxide having an average particle size of 10 nm to 1 μm, magnetite having an average particle size of 1.0 μm or less, cerium oxide having an average particle size of 0.5 to 5 μm, and zirconia having an average particle size of 5 to 50 nm.

A clutch disc including a drive plate concentrically arranged about an axis of rotation, the drive plate having: a first side facing a first axial direction; a second side facing a second axial direction, opposite the first axial direction. The drive plate includes a first plurality of through-bores at a first radial distance from the axis of rotation and a second plurality of through-bores at a second radial distance from the axis of rotation, where the second radial distance is different from the first radial distance. The first and second pluralities of through-bores are arranged such that an arc passes through the first and second pluralities of through-bores.

A brake pad for a disc brake with decreased wear characteristics is provided. The brake pad is configured with the distribution of brake pad friction material weighted toward the radially outer region of the brake pad, with the lateral sides of the pad material being generally aligned with radial lines originating at the rotation axis of the brake disc of the disc brake. The brake pad friction material distribution results in decreased brake application pressure between the brake pad and the brake disc while obtaining the same braking force provided by a comparable generally rectangular brake pad, resulting in lower brake pad wear at the same braking force levels.

A brake pad having a surface coating operable to enhance the bedding-in process during normal operation. The surface coating may be formulated using one or more materials found in a friction lining of the brake pad. The surface coating may be formulated using only non-metal materials.