Abstract: A machining head 12 for a machine tool 18 comprises: a first body 14 adapted to be connected to a sleeve 16 of a machine tool 18, so as to be rotatable with respect thereto about a first axis of rotation C; a second body 20 connected to the first body 14 so as to be rotatable with respect thereto about a second axis of rotation A; a mandrel 42 adapted to mount a tool and adapted to be fixed to the second body 20 by means of fixing means 44 provided on the second body 20 and on the mandrel 42. The mandrel 42 defines a mandrel axis of rotation M for the tool. The machining head 12 further comprises a motor 48 with an output shaft 50 for rotation of the tool-carrying shaft about the mandrel axis of rotation M. the machining head is characterized in that the axis of rotation of the output shaft 50 of the motor 48 coincides with the second axis of rotation A of the second body 20.

Abstract: An automatic open-structure machine tool has an upright (3) which moves along a track (2) (axis X) fixed to a base (1), the upright being integral with a projecting crosspiece (4) along which moves (axis Y) the support (5) of a sleeve (6) which moves along an axis orthogonal to the preceding ones (axis Z). An additional structure (8) designed to be located at the open side of the machine tool is, fitted with a connector system (9) which slides along the structure, such connector system being designed for connection to the free end of the crosspiece, so as to make the open-structure into a gantry machine.

Abstract: An operating head for automatic machine tools, which includes a fork fitted on a support having various degrees of freedom; a mechanism for the numerical control of rotation of the fork around its axis; a support for a chuck, being fitted up on said fork and rotatably relative to it around an axis which is orthogonal to the former, under a numerical control; a shaft coaxial with the axis of rotation of the support for the chuck and connected, by the use of bevel gears, at one end to devices for the transmission of motion and, at its other end, to the shaft of the chuck wherein devices are provided for allowing change of the angular position of both the fork and support for the chuck, keeping the tool in contact with the piece to be machined.

Abstract: This invention relates to an operating head for automatic machine tools of the type consisting of a fork with several degrees of freedom to which the support of a chuck is hinged, which can rotate arond an axis passing through the arms of the fork. In accordance with the invention clamping devices are provided, designed to lock the support of the chuck in any angular position to the fork, to perform power tasks with high precision.

Abstract: An apparatus for controlling depth machining in a space and with the use of jigs, includes a body having two sliding parts biased by a spring and suitable for a drilling tool, with some clearance. One part is provided with couplings for assembling on a machine-tool, and the other is provided with a presser and a drill guide. Another spring which is suitable for keeping the tool centered is included and a relative stroke between the two sliding parts is longer than the drilling stroke of the tool.

Abstract: This invention relates to a machine tool, designed for rapid machining of models in particular, which comprises a C-shaped structure fitted with a toolhead with several degrees of freedom which can move parallel to one of the machine axes in order to machine non-tough materials rapidly; for example, it can be used to produce plastic models which are to undergo further finishing operations.

Abstract: The invention relates to a method and equipment designed to drill countersunk holes on surfaces of unknown positions in which a presser fitted to the tool support is placed against the surface to be drilled, and can move axially in relation to the tool; the presser is used as a limit switch to control tool return.

Abstract: The present invention relates to a machine tool and in particular a machine for making three dimensional models, having a carrying structure of the closed monocoque body type, with the advantage of greater lightness and rigidity with respect to known machines with latticework or tubular structures.

Abstract: A machine tool head comprises a fork fitted to a support having a plurality of degrees of freedom, and a tool unit hinged to the fork. The tool unit contains equipment designed to control a tool carrier so that it can traverse along an axis, and equipment designed to perform controlled tool rotation around that axis. The tool carrier is in the form of a shaft which is mounted on a bushing to which a crown gear is connected. The crown gear engages a first pinion which meshes with a second pinion that is connected to a gear motor. The gear motor and the first and second pinions are mounted as a unit on a hinge to the structure which supports the bushing and a biasing mechanism is provided for urgening the first pinion into meshing engagement with the crown gear.

Abstract: An apparatus for supporting and retaining in position a curved sheet (5) which is to be subjected to a machining operation comprising a plurality of support devices (6) spaced apart at regular intervals on a support plate (7), which support devices are positionable at predetermined locations to support and retain the sheet (5), wherein each support device (6) comprises a sliding support member (10) positionable against a contact member, the support member having means (12) capable of adhering to a sheet (5) pivotally mounted thereon, and control means (31) for controlling the pivotal movement of the adhesion means (12) so as to bring the sheet (5) into contact with the positioned support member (6) and to hold the sheet in position to permit machining to take place.

Abstract: A rotating machining head for automatic tool machines has suction ducts for dust placed inside the head device. This permits the head to have a substantially rounded shape with a minimum encombrance, which is equal in all directions and for any positioning of the head.

Abstract: A machine tool, designed for volume production, comprises a head with a single spindle, rotatably mounted about an axis, inclined by 45.degree. in respect of the horizontal working plane of the machine. Automatic control means allow said head to take up at least the two positions corresponding to the horizontal spindle position and to the vertical position, while a single device is provided for the automatic change of the tools, adapted to change the tools on the spindle of said head, when the latter takes up one of said two positions.