Abstract:
An on-car disc brake lathe system (30) for resurfacing a brake disc of a vehicle brake assembly includes a lathe body (34) with a driving motor (32), a cutting head (36) operably attached to the lathe body, and a drive shaft (68). The system also includes an alignment system (50) having an electronic controller (600), input and output adaptors (66, 82) configured to rotate with the drive shaft, one or more adjustment discs (90, 92), and an adjustment mechanism (94, 96).
Abstract:
This invention relates to a method for fabricating a vehicle hub, bearing, and brake disc assembly wherein the braking surface (29a, 30a) of the brake disc is oriented in a predetermined relationship relative to the outer race of the bearing assembly (15). The method comprises the steps of: (a) providing a vehicle hub (14) including a hub flange (20); (b) installing a bearing assembly (15) about the vehicle hub, the bearing assembly including an outer race (32); (c) securing a brake disc (26) to the hub flange of the vehicle hub, the brake disc including a braking surface; (d) supporting the vehicle hub, bearing, and brake disc assembly on a machining apparatus; (e) using the machining apparatus to machine the braking surface of the brake disc whereby the braking surface (29a, 30a) is oriented in a predetermined relationship relative to the outer race (32) of the bearing assembly (15).
Abstract:
An apparatus (50) and method for automatically compensating for the lateral runout between an on-car lathe apparatus (52) and a vehicle hub (44) axis including one or more stop discs (94, 96) that rotate with the drive shaft of the lathe and that can be selectively stopped from rotating with the shaft by a stop mechanism (98, 100).
Abstract:
An on-car disc brake lathe system (30) for resurfacing a brake disc of a vehicle brake assembly includes a lathe body (34) with a driving motor (32), a cutting head (36) operably attached to the lathe body, and a drive shaft (68). The system also includes an alignment system (50) having an electronic controller (600), input and output adaptors (66, 82) configured to rotate with the drive shaft, one or more adjustment discs (90, 92), and an adjustment mechanism (94, 96).
Abstract:
A runout measurement and control system includes an accelerometer comprising a one-piece unit that can be easily secured to the housing (52) of a disc brake lathe (48). The accelerometer includes rotor, rotor body and transducer, and uses a spring to adjust the natural resonant frequency of the rotor. The system also includes a control circuit comprising a microprocessor to analyze the accelerometer data and provide a corrective signal to adjust the axial alignment of the lathe with respect to a vehicle in order to compensate for the lateral runout of the disck brake assembly. The control algorithm uses trail and error inquiries.
Abstract:
A disc brake lathe for machining a brake disc on a vehicle without removing the disc from the vehicle, but only the wheel and other parts of the brake mechanism. The disc brake lathe comprises a power drive unit (3) for rotating a brake disc on the vehicle and a lathe head (2) having at least one cutting tool (15) for machining the disc while being rotated by the power drive unit. The lathe head is adapted to be mounted on the vehicle and includes a motor for power feeding of the at least one cutting tool in each of two opposite directions during machining. Vibration of the lathe head during machining, which causes rough surface finish on the machined brake discs, is avoided or reduced by the provision of a vibration damper (50) which is attached to the lathe head for absorbing energy of vibration.