Patent ID: 7416473

Claim:
A work-centre for machining the edge of plates of glass, stone, marble or the like, comprising: a bench, defining a work surface, designed to receive the plates to be machined; two fixed side members, set at the two sides of the work surface; an overhead cross-member, guided over the two side members, in a horizontal direction Y orthogonal to the horizontal direction X of the cross-member; a carriage, which is mobile in the aforesaid horizontal direction X on the cross-member; a first machining head, mounted on a slide, which is mobile on the carriage in a vertical direction Z, said first machining head being equipped with a rotating spindle, which can be coupled to a machining tool, and with the corresponding electric driving motor; first, second, and third motor means for controlling the cross-member, of the carriage, and of the slide along the axes Y, X, and Z, respectively; and electronic means for controlling said first, second, and third motor means and the electric driving motor of the aforesaid spindle, said work-centre being characterized in that: the slide mounted on the carriage moreover carries at least one second machining head, which is mounted on said slide in cantilever fashion, and pivotally with respect to the axis of the spindle of the first machining head; the second machining head has an auxiliary rotating spindle having an axis substantially parallel to the axis of the spindle of the first machining head and set at a distance therefrom, said auxiliary spindle being coupleable to an auxiliary machining tool; means are provided for controlling rotation of the auxiliary spindle; auxiliary motor means are provided, which control the angular position of the second machining head with respect to the axis of the first spindle; and the aforesaid electronic control means are designed to control also the aforesaid auxiliary motor means and are programmable so that during machining of the edge of a plate the consecutive passing of the first tool and of the auxiliary tool is obtained, in any order, along the edge of the plate with one and the same movement of the carriage and/or of the cross-member of the work-centre, and so that for each position of the first machining head along said edge, the angular position assumed by the second machining head with respect to the axis of the first spindle is such that said second machining head is in contact with said edge.