Abstract: The invention relates to a machine tool having a gantry that is movable along an X axis and having a vertical spindle supported by the cross-member of the gantry. The cross-member comprises two beams that are spaced apart in the X axis direction and that have facing inside faces. Two carriages are mounted to slide on said facing faces, on opposite sides of a vertically movable cursor-carrier. The tool-carrier spindle is carried by a cursor mounted to slide on the bottom face of the cursor-carrier and movable along the X axis. Movements of the carriages, of the cursor-carrier and of cursor are under numerical control. The tool-carrier spindle can move in the X axis direction without it being necessary to move the gantry.

Abstract: The invention relates to a moving gantry machine having uprights that are movable relative to each other. The uprights are interconnected by a cross-member made up of two cross-member elements suitable for being moved relative to each other in the limit of a given maximum offset .DELTA. in the displacement direction of the uprights. The displacement of the uprights is controlled by respective independent drive systems X.sub.1 and X.sub.2 under numerical control within the limit of said offset. A third drive system X.sub.3 is provided for displacement between the cross-member elements and is under numerical control with the condition the displacement distance of drive system X.sub.1 +the displacement distance of drive system X.sub.3 =the displacement distance of drive system X.sub.2.

Abstract: This invention relates to a vertical milling and boring machine incorporating a gantry, comprising a lower table adapted to support the pieces to be machined, a gantry comprising two uprights disposed on either side of the table and a tie joining the upper ends of said uprights, a crosspiece supported by said gantry and mobile vertically along said uprights, a carriage supported by said crosspiece and mobile horizontally and a tool-holder member mounted to move vertically on said carriage, said table and said gantry being capable of moving with respect to each other, characterized in that the tie presents a flat front face located in the plane of the front faces of the uprights, in that the crosspiece is mobile vertically solely along the front face of said tie, and in that the rear face of the crosspiece is maintained in abutment on the front face of the tie and on the front faces of the uprights, at least during the machining phases, by locking means.

Abstract: A machine tool having a vertically movable machining head and an automatic tool changer, and fitted with a tool magazine including two same-diameter superposed disks, namely an upper disk and a lower disk, with tools being distributed around the peripheries thereof, and automatic rotary drive and indexing means for said disks, said machining head and said tool magazine being capable of moving relative to each other to enable a tool to be changed,wherein the lower disk is offset relative to the upper disk towards the machining head through a distance d leaving room for the machining head to take tools from said lower disk or to deposit them thereon.