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Abstract

A method of machining mechanical workpieces, in particular of machining the braking surfaces (2,3) of a brake disc (1) for vehicles is described and comprises the steps of loading the workpiece onto a work station (8) and clamping the workpiece in a median reference plane (A) between the opposed braking surfaces (2,3), as well as defining the excess material material thickness to be removed from each of the said surfaces, with respect to the positioning coordinates of the said plane in relation to a system of working axes of the station, to achieve a balanced, centred division of excess metal removed from the said surfaces (2,3). The method also comprises the steps of preliminarily loading and clamping the workpiece on a handling device (7) operatively controlled by the work station (8) for the machining of the workpiece, the workpiece being gripped on the handling device (7) in the region of the said madian place (A), of bringing the said device (7), towards a workpiece-holder chuck (10) of the work station (8) with subsequent measurement of the positioning co-ordinates of the said median plane (A) in relation to the system of working axes, and of clamping the workpiece on the chuck (10) of the work station and releasing the handling device (7) to allow both of the opposed workpiece surfaces (2,3) to be machined in the said work station (8) by removal of the preselected excess material thicknesses calculated in relation to the positioning co-ordinates of the said plane (A).

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First Claim