摘要:
A brake disk (1; 40; 60; 80; 90; 100) comprising a bell (2), having an axis of rotation (3), and a braking band (4), produced as separate parts and in engagement by means of a shaped coupling (14) with tangential and axial restraints is characterized in that the brake disk comprises at least one insert (19; 41; 61; 81) which is deformable in a plastic or elastic manner in the shaped coupling (14) in order to ensure that the loads transmitted by a braking action are distributed substantially uniformly on the braking band (4) and on the bell (2).
摘要:
A disc for a disc brake, which has usually good cooling efficiency together with good resistance to wear ant to thermal/mechanical stresses, comprises a braking band (12), for example, a ventilated braking band, provided with a plurality of radial teeth (26) formed along an inner portion and alternating with respective recesses (28). A bell (14) has a plurality of radial teeth (34) formed along an outer portion and alternating with respective recesses (36). The braking band (12) and the bell (14) define a rotation axis (15) and are connected to one another by a form fit between the teeth (26, 34) of one and the respective recesses (28, 36) of the other. A recess (36) of the bell (14) is defined at least partially by a wall (38) suitable for driving the braking band and has a length (L) greater than the thickness (S) of the teeth of the bell, the length (L) and the thickness (S) being measured in a direction parallel to the rotation axis (15).
摘要:
The present invention relates to a pad (1) for disk brakes, comprising a plate (3) for supporting a friction material (2), characterized in that the plate (3) is made substantially of a composite ceramic material or of a composite powder-metallurgical material. The pad (1) has excellent lightness whilst its strength remains unchanged. Moreover the pad (1) advantageously enables the transmission of heat towards the piston to be reduced.
摘要:
A mould (1) for moulding braking bands (20) with ventilation ducts (21) whith the use of composite material and, in particular, of C/SiC ceramic material, comprises two half-moulds (3a, 3b) with respective impression surfaces (8a, 8b) which face one another and lie perpendicular to an axis of symmetry (s) and which, together with outer and inner cylindrical walls (11, 12), define a moulding cavity (4) in the shape of the braking band (20) to be moulded. The mould (1) also has pin elements (15) which have the shape of the ventilation ducts (21) and which can be transferred by secondary actuating means (17) from a rest position to a working position and vice versa, the pin elements (15) being outside the moulding cavity (4) in the rest position and the pin elements (15) being inserted in the moulding cavity (4) in the working position.
摘要:
The specification describes a method and a system for measuring the wear of a disk of composite ceramic material of a disk brake. The method comprises the following operations: measuring the temperature (T) of the disk at a predetermined frequency (f), calculating a wear increment (delta i) as a function of the measured temperature (T) at every temperature measurement, summing the calculated wear increments (delta i) comparing the sum of the wear increments with a predetermined limiting wear index (i lim) and signalling the eventual overstepping of the limiting wear index (i lim) .
摘要:
The present invention relates to a pad (1) for disk brakes, comprising a plate (3) for supporting a friction material (2), characterized in that the plate (3) is made substantially of a composite ceramic material or of a composite powder-metallurgical material. The pad (1) has excellent lightness whilst its strength remains unchanged. Moreover the pad (1) advantageously enables the transmission of heat towards the piston to be reduced.
摘要:
The present invention relates to a process for the production of a braking band for a brake disk with venting passages and to a braking band which can be produced by the process. The process comprises the following steps: moulding a core (200) of the braking band in a suitable mould (1), moulding two covers (8) onto the core in a further suitable mould (101) so as to form a semi-finished product having a 'sandwich' structure, firing the semi-finished product so as to produce a predetermined porosity of the covers, firing the semi-finished product further, in the presence of silicon, at a temperature such as substantially to bring about fusion of the silicon and its infiltration into the covers.
摘要:
A brake disk (1; 40; 60; 80; 90; 100) comprising a bell (2), having an axis of rotation (3), and a braking band (4), produced as separate parts and in engagement by means of a shaped coupling (14) with tangential and axial restraints is characterized in that the brake disk comprises at least one insert (19; 41; 61; 81) which is deformable in a plastic or elastic manner in the shaped coupling (14) in order to ensure that the loads transmitted by a braking action are distributed substantially uniformly on the braking band (4) and on the bell (2).
摘要:
A mould (4) for forming braking (5) of composite material having two rotor plates (6A, 6B) having a predetermined axis (X), separated by ventilation ducts (9) which extend from an outer edge (8) to an inner edge (7) of the braking band (5). The mould (4) comprises two half-shells (10, 12), inner (16) and outer (20) containment means designed to bound the inner edge (7) and the outer edge (8) respectively of the braking band (5), in such a way that the inner (16) an outer (20) containment means bound a forming cavity (24) with the two half-shells (10, 12). The inner containment means (16) comprise an inner side wall (28) from which shaping elements project perpendicular to the axis (X) and are bounded along the axis (X) by a first (38) and a second (40) axial extremity. In a configuration in which the mould (4) is closed, only one of the said axial extremities (38, 40) projects within the forming cavity (24).