Cement or other liquid-like material fills the hollow tubes of a machine tool under construction. The machine tool structures are held rigidly against a fixture while the substance dries. The machine tool so constructed is relatively lightweight and rigid, and obviates the need for precision machining of large portions of the apparatus.

A clamping device includes a clamping chuck and a clamping element, which can be clamped thereto. The clamping chuck has a receiving opening for the clamping element and clamping members for clamping the clamping element in the receiving opening. The clamping element is elongated, while the clamping chuck is provided with an elongated receiving opening for the clamping element. A resiliently flexible centering element, which aligns the clamping element in response to the insertion into the receiving opening at right angles to the longitudinal axis of the receiving opening, is arranged on the clamping chuck in the insertion area of the receiving opening. Such a clamping device is suitable in clamping systems by means of which large to very large workpiece carriers can be clamped in the work area of a machine tool in a repeatably accurate manner.

A mounting system includes a magnet core arranged for positioning inside a magnet coil. The magnet core includes a cylindrical, elongate receiving region with a central axis, a rapid-mounting mandrel arranged for insertion into the cylindrical, elongate receiving region, and a discoid workpiece driver, detachably fastened to the rapid-mounting mandrel and extending normal to the central axis. A one of the magnet core or the rapid-mounting mandrel includes a rapid-mounting device for mounting the rapid-mounting mandrel in the magnet core. Example embodiments may includes the rapid-mounting device integrated into the magnet core or integrated into the rapid-mounting mandrel.

A replaceable tool holder includes a connector adapted to be engaged with and driven to rotate by a spindle, a tool chuck, of which an end is detachably engaged with the connector and another end is adapted to engage a tool, and an electronic component provided in a chamber inside the tool chuck. The connector is provided with a non-contact power transmission device. A passage is provided in the connector and the tool chuck, wherein a wire is disposed in the passage, transmitting electric power to serve the need of the electronic component. With such design, one connector can be used to connect tool chucks of different types or models. Therefore, a user could, as required, replace the connecting interface between the tool holder and the spindle or the connecting interface between the tool holder and the tool. Furthermore, the electronic component could be steadily supplied with electric power.

A clamping device includes a zero-point clamping system, which can be actuated by a working medium; a machine vice, which can be coupled to the system; and a gripping and positioning device for transporting and positioning the machine vice on the zero-point clamping system. The zero-point clamping system contains at least one coupling element and the gripping and positioning device contains a docking device having at least one docking element, which can be coupled to the coupling element, for supplying the working medium to the system. To facilitate coupling, the at least one coupling element of the system is offset parallel to a receiving opening for a clamping element on the machine vice, and the at least one docking element is positioned in such a way that it is coupled to the coupling element by retraction of the clamping element located on the machine vice into the receiving opening.

A measuring system monitors a spindle. The measuring system includes a cylindrical housing which can be arranged in and mechanically firmly connected to a spindle housing. A carrier ring is arranged inside the cylindrical housing. Three sensors for measuring a radial displacement and three sensors for measuring an axial displacement of the spindle are distributed over a circumference of the carrier ring. The sensors are cast with the carrier ring.

A workpiece holder, which does not require actual parts matching as required in a related-art automatic pallet changer, and has higher maintainability than a related-art automatic pallet changer. The workpiece-side jig includes a workpiece-side fitting element provided on a surface opposed to the master-side jig. The master-side jig includes: a master-side fitting element to be fitted to the workpiece-side fitting element, which is provided on a surface opposed to the workpiece-side jig; a rotary pressing member to be brought into abutment against the workpiece-side fitting element fitted to the master-side fitting element to press the workpiece-side fitting element toward the master-side jig; and a rotational drive source configured to rotate the rotary pressing member. When the rotary pressing member is rotated by the rotational drive source, the rotary pressing member is brought into abutment against the workpiece-side fitting element to press the workpiece-side fitting element toward the master-side jig.

The disclosed device comprises a manually-actuated micro positioning stage that incorporates a mechanism for measurement and electronic output of the stage slider position. A Hall Effect sensor device is used to sense rotary position of the lead screw. based on the lead screw pitch. Processor means converts the Hall Effect sensor measurement of the lead screw rotational displacement into linear displacement of the stage slider for presentation on an electronic display. A magnetically-permeable cap contains a small disc magnet that is poled diametrically and is affixed to the end of the lead screw that is in contact with the stage slider by means of a sensor housing. The Hall Effect sensor contained in a surface mount electronic package is enclosed in a sensor housing that is part of the stage slider that is in contact with the lead screw and is positioned coaxially with the lead screw.

A method for correcting non-rigid thin-walled tubular elements having geometric deficiencies, wherein, following correction, the tubular elements may perform over a wide range of pressure and temperatures, for example as a rocket motor beaker, from about −70 C to about 1000 C. Correction is required to remove asperities, maximize cylindricity, squaring a forward end wall and a rearward end wall, so that the forward end wall of the tube product may be fitted, bonded and sealed to a circular planar element using a labyrinth-joint closure. The method provides uniformity so that both the tubular elements and the circular planar elements are interchangeably uniform in size, shape and performance, and may be readily assembled into non-rigid thin-walled tube products.

A workpiece clamping device able to perform a set-up changing operation for clamping members depending on the kind of a workpiece to be processed, at a low cost, by a simple method. The workpiece clamping device includes a bracket, a movable part which is movable with respect to the bracket, a clamping member to be attached to and detached from the bracket or the movable part, to clamp a workpiece, and a detachable device for detachably coupling the bracket or the movable part to the clamping member.