Abstract: A fixture for drilling sheets of fragile material is connectable to a movable machining head having a supporting structure and a rotary member, and includes a supporting frame, a shank for connecting the supporting frame to the supporting structure, and a first and at least a second powered spindle for a first and, respectively, a second drilling tool and extending in opposite directions with respect to the supporting frame; the spindles being rotated about respective axes parallel to each other by a transmission, an input member of which is connected to the rotary member of the machining head.

Abstract: A machine for working sheets of fragile material has a base; a supporting surface for supporting the work sheets; and a machining head powered to move over the supporting surface and perform machining operations on the sheets; the supporting surface having a partition wall movable between a partitioning position extending above the supporting surface and defining, on the supporting surface, two completely separate work stations, and a rest position in which the wall is located clear of the supporting surface.

Abstract: A machine for machining sheet of glass has a frame, a movable machining head, a number of sheet supporting/retaining members, a number of sheet locating members, and a number of push members for pushing the sheet against the locating members; the machine having a number of separate modules, each of which has a respective supporting structure connected to the frame to move, with respect to the frame, independently of the other supporting structures, and supports at least some of the supporting/retaining members, locating members, and push members; the position of the supporting structures of the modules and of the members carried by the modules being adjustable by means of the machining head.

Abstract: The process for the automatic machining of edges of glass plates includes the steps of:fixing the glass plate onto a work table;storing a set of space coordinates along two orthogonal axes X and Y of the edge of the plate to be machined, the coordinates being either detected by means of successive sequences of self-learning movements of a probe along the edge of the plate or being set on a keyboard;processing the coordinates in order to determine the path to be followed by the contour of a grinder in order to produce a contour which is constituted by mutually tangent arcs and straight lines;calculating the successive movements along the axes X and Y which the center of the grinder must perform in order to machine the edge of the plate according to the diameter and/or wear of the grinder being used;controlling, according to the calculated values, the movements of a grinder-supporting machining head along the edge of the plate;actuating the head so as to remove in succession, from a tool magazine, the self-lear