Abstract: A key duplicating apparatus having automatic key clamping mechanisms for a master key and a key blank, a circular key follower and a key cutter mounted on a pivoting base that pivots and slides on a support shaft, and a mounting plate for mounting the clamping mechanisms and the support shaft. The apparatus is preferably automatically controlled by a microprocessing circuit. Also, the circular key follower is eccentrically mounted on a mounting shaft for adjustment of the depth of cutting of the key blank.

Abstract: In a machine tool having a spindle supporting a work holder, means are provided for automatically operating the work holder to grip or release a workpiece and for automatically securing the work holder to the spindle or release it therefrom. Within the spindle, a compression spring acts on a slide which has claws gripping a head provided at one end of a holder housing to draw the latter into engagement with a conical socket of the spindle thereby to secure the holder. Within the holder housing, a compression spring urges a set of jaws into a conical socket of the housing thereby to grip a workpiece. A hydraulic actuator mounted on fixed structure is adapted both for opening the jaws and for releasing the holder from the spindle. For opening the jaws, a piston of the actuator is moved through an initial distance X thereby to move the jaws in opposition to the spring in the opening sense. The piston acts through the intermediary of a rod supported in the slide for free movement relative thereto.

Abstract: An improved chip disposer which removes chips or iron chips produced from a machine tool by using magnetic force is disclosed.

Abstract: A method of working on a sloping surface of work is disclosed by means of a numerically controlled machine tool comprising a cutting tool carried by a spindle movable along three orthogonal axes, and a worktable rotatable both about its own axis and about another axis angularly displaced 45 degrees therefrom. The tool movements along the three axes and the worktable revolutions about the two axes are all controlled by a numerical control system, to which there are input prescribed data concerning the particular workpiece to be machined. The numerical control system is programmed to cause the machine tool to work, for example, on a conical surface or to drill one, two or more holes in preassigned positions on a sloping surface.

Abstract: The power tool has a magnetic base with superposed permanent magnet assemblies. The upper assembly can be moved relative to the lower assembly to subtract from or reinforce the magnetic field. When the sensing probe is pushed into the base the electric motor can be switched on to rotate a spindle on which a rotary cutting tool is axially mounted. The tool feed is controlled by a handle which can be mounted on either side of the tool housing. A coolant reservoir on the base has a hose connected to a pump which is connected to a manifold supplying coolant to the center of the cutting tool. The cutting tool is biased upwardly and pinches off the coolant when the tool is raised from the work.

Abstract: A quick disconnect coupling mechanism for a collet and collet tube facilitates connection and disconnection of the two members to and from one another. In a preferred form, the collet is provided with circumferentially spaced external threaded portions which are separated by unthreaded portions. The collet tube is provided with internally threaded, circumferentially spaced mating threaded portions which are separated by unthreaded portions. The collet tube can be quickly slipped over the collet, and located at a predetermined axial position thereon, and the two components can be rotated relative to one another to cause the threads to be moved into engagement with each other. The invention provides an indicator system for providing initial alignment of the collet tube with the collet. In a independently limits axial movement of the members relative to one another beyond a preset torque limit.

Abstract: The present invention relates to a tool radius compensation method for numerically controlled apparatus in which the coordinates Pi of the position of a tool center are computed which is offset a distance equal to the radius r of the tool in a direction normal to a surface to be cut based on commanded positional information P.sub.1, Pc and P.sub.2, for enabling the tool to three-dimensionally cut a workpiece. Based on the positional information P.sub.1, Pc and P.sub.2, a unit offset vector Vi is determined which lies on a plane defined by vectors U and V normal to first and second surfaces to be cut at a three-dimensional corner point Pc. Components along respective axes of the unit offset vector Vi are corrected so that the tool center will move smoothly along a curve contiguous to paths of movement of the tool center before and after the three-dimensional corner point Pc.

Abstract: Contouring of a stack of one or more circuit boards is effected by first partially cutting the contour, leaving a portion of the contour long enough to ensure the rigidity of the circuit with respect to the board. The circuit is then clamped, while the remaining portion is cut without any discontinuity in the cutting. The machine comprises an operating head and a workpiece pressing pad which is operated for clamping the circuit during the cutting of the remaining portion of the contour. The pad is movable with respect to the head in a direction parallel to the uncut portion of the contour for displacement at least equal to the length of such portion. After the cut, as the head is raised, the pad is returned to rest position by the camming action of a roller against a sloping edge.

Abstract: Disclosed is an improved core drill and a method of detachably coupling the same to a power driving unit to expedite the removal of a core therefrom. This is achieved by equipping the rear end of the drill stem with a fixedly attached externally threaded bushing. A coupling sleeve has internal threads at either end matable respectively with the bushing threads and the threaded drive shank of a power driving unit. This sleeve and the core drill are readily detached as a unit from the power drive thereby permitting the rapid removal of the core from the rear end of the drill rather than past the cutting ring at its front end.

Abstract: A contact detecting system for detecting the contact of a tool element, supported by a main shaft of a machine, with a workpiece comprises exciting and detecting coil assemblies, an electric power source for supplying a high frequency electric current to the exciting coil assembly to cause the latter to produce an induction current flowing in a loop circuit constituted by the machine shaft, the tool element and a framework of the machine, and a detector unit for generating a detection signal indicative of the actual contact of the tool element with the workpiece when the detector unit has detected the presence of a current component, which has resulted from the induction current generated by the exciting coil assembly, in the output signal from the detecting coil assembly.

Abstract: A method of forming a screw thread on one portion of a crankshaft and the like wherein the one portion of the shaft is worked on to provide thereto a diameter of a value greater than the value of the diameter of the one portion of the shaft before it is subjected to roll threading plus the value of the thickness of a hard, thin surface layer expected to be formed by carburizing on the whole of the shaft. Then, carburizing is performed to form the hard, thin surface layer on the whole of the shaft. Thereafter, the one portion of the shaft is subjected to grinding or machining to remove the hard, thin surface layer therefrom to reduce the diameter of the one portion of the shaft to a level conforming to the diameter thereof before roll threading is performed on the one portion of the shaft, and roll threading is performed on the one portion of the shaft from which the hard, thin surface layer is removed, to provide the shaft with a threaded portion.

Abstract: The invention relates to a milling device with universal gear and automatic indexation, removably mounted on a milling head bearing a machining spindle, comprising a main body mounted on the milling head and capable of occupying several positions of indexation with respect to said head by rotation about an axis XX.sub.1 lying in line with the axis of the spindle of the milling head, said main body laterally bearing a spindle-holder unit capable of occupying several positions of indexation with respect to the main body by rotation about an axis YY.sub.1 perpendicular to axis XX.sub.1, the spindle of the unit itself being perpendicular to axis YY.sub.1, wherein the spindle of the milling head is connected to the spindle of the spindle-holder unit by a kinematic chain comprising a shaft or sleeve disposed along axis YY.sub.

Abstract: A boring machine used for a line boring bearing housings of an automotive engine block which provides for very secure mounting and precise operation by having rigidity built into the mounting table but yet is low cost, easy to fabricate, and readily adapted to a wide variety of different sizes of engine heads.

Abstract: A multiple station drilling apparatus is used for performing a large number of repetitive but variable machining operations, and includes a turntable having a plurality of workpiece holding fixtures distributed in spaced relation around its periphery, a plurality of tool supports mounted around and outward of the periphery to provide a sequence of machining stations, a load/unload station for the mounting of workpieces on the fixtures and their removal therefrom, and a motor for driving the turntable in an indexing fashion to bring workpieces held in the fixtures successively into registry with the machining stations. Each tool support includes at least one X-Y positioner which in turn supports a machining tool such as a reciprocating drill.

Abstract: A power hand drill is clamped in the carriage which is slideably mounted on the vertical column. The lever arm is moved about a fixed pivot to control movement of the carriage. The lever arm is tubular and has a push rod extending from the handle into the interior of the housing to actuate a switch which, when closed, connects the power supply cord to a receptacle into which the drill power cord is plugged. The drill power switch is tied in the closed position. Therefore the user can control drill feed and operation with one hand.

Abstract: The machining apparatus includes a machine tool having a primary spindle slide with a transversely extending tool head support rail member thereon which is aligned successively with a tool head load rail mechanism and unload rail mechanism on a side of the machine tool by movement of the primary spindle slide to load or unload a multi-spindle tool head. When the tool head is loaded in operative position on the rail member, the spindles of the tool head are driven by the primary spindle through a gear train in the tool head. An overhead gantry robot conveys tool heads between the load and unlaod rail mechanisms and a stationary tool head storage unit on the side of the machine tool.

Abstract: A holder for a cutting tool has a main spindle formed with a bore to receive the cutting tool, a casing mounted on the main spindle, and an oil receiver stand secured to the casing. The main spindle, casing and receiver stand are each formed with an oil passage communicating with one another to feed cutting fluid to the cutting tool. The holder is characterized in that an intersifier for increasing the feed pressure of the cutting fluid is provided in an annular chamber provided around the main spindle in the oil passage to the cutting tool.

Abstract: A machine tool having an indexable workpiece support and a tool holder which is moveable to enable the machine tool to operate on different parts of a workpiece while the latter is held stationary by the workpiece support, indexing of the workpiece support enabling a part thereof to be turned from a first position in which a workpiece can be mounted on that part, to a second position to present such a workpiece to the tool holder, whereby one workpiece can be loaded on one part of the workpiece support while another workpiece on another part of the workpiece support is being simultaneously machined by the machine tool.

Abstract: A wire shaving apparatus for shaving a periphery of wire, bar or rod stock, including structure defining a product flow path between an input and an output and a plurality of shaving stations spaced along said flow path for scrapingly engaging product conveyed through said structure. Each shaving station includes a pair of slide mechanisms, one slide mounting a releasable tool cartridge including a pair of cutting tools having associated cutting edges positioned at a predetermined angle, and another slide assembly mounting a product support cartridge including support rollers aligned with said cutting tools for supporting said product as it is being scraped. The slides are reciprocally moved between processing and retracted positions by a threaded drive shaft, the rotation of which is controlled by a servo controlled system. A clamping arrangement associated with each slide mechanism releasably clamps the tool and support cartridges allowing easy and speedy replacement.

Abstract: Disclosed is a structure for installing a multispindle attachment on a drilling machine or the like. An upper gear coupling member is secured at the lower end of a quill housing a main rotary spindle for a drilling machine, etc. A clamp member is rotatably provided on the gear coupling member. A lower gear coupling member for engaging with the upper gear coupling member is secured on the upper surface of the multispindle attachment installed at the lower end of the quill. Both of these gear coupling members are tightened and secured by means of the clamp member while both of the upper and lower gear coupling members are engaged with each other.