Abstract: The tool-changing device comprises a tool carrier rotatably mounted in a basic housing by means of a hollow shaft. This tool carrier is driven via a ring motor, the rotor of which is directly connected to the hollow shaft. A servomotor for the drive of tools is provided in the interior of the hollow shaft. Furthermore, the cavity of the hollow shaft also accommodates supply lines for the tools.

Abstract: A rotary turret head apparatus for installing a fastener such as a rivet. The rotary turret head apparatus has a plurality of machining and fastener installation tools disposed perpendicular to the axis of rotation of the turret. The individual tools are independently powered and the entire turret head apparatus is fed toward the workpiece by a single actuator mechanism such as a roller screw or hydraulic cylinder thereby eliminating the need for a separate actuating mechanism for each tool and eliminating the need for engagement of each tool with a central actuating mechanism.

Abstract: Positioning engaging members (27) are provided between a base table (10) and a turret (11) which is indexed relative to the base table (10) by a driving force of an indexing/tool turning motor (32) so as to be engageable with or disengageable from each other. The positioning engaging members (27) engage with each other to prevent the turret (11) from turning. Further, the driving force of the indexing/tool turning motor (32) is transmitted or not transmitted to the turret (11) by clutch pieces (31). The driving force of the indexing/tool turning motor (32) is transmitted to a turning tool (14) mounted on tool mounting portions (12) of the turret (11) via a power transmission member. The positioning engaging members (27) engage with or disengage from each other by an engaging unit.

Abstract: The present invention relates to a portable electric drill having a rotatable magazine containing multiple tool bits from which a single bit may be selected for use. The magazine is in the form of an approximate 120-degree segment of a cylinder with a plurality of open grooves for holding the various bits. The drill includes a Jacobs-type chuck assembly with a bore into which the selected bit is inserted for use. The magazine may be rotated to position any one of the magazine grooves into axial alignment with the bore of the chuck, so that the user may index the magazine to position a selected bit for expulsion from a particular magazine groove into the chuck. The chuck may then be tightened around the selected bit and the electric motor actuated to drive the bit. A cable assembly within the drill housing is operable with an exterior button to be movable between a stored position and a forward position to push a selected bit from a groove on the magazine into the chuck assembly.

Abstract: The invention relates to toolholders and mechanisms for securing the toolholder to a lathe turret or tool indexer. One embodiment of the invention comprises a base adapted to be secured to a rotary lathe table via a mechanism receivable in slots or grooves which can be wedged and compressively secured about selected positions about an engagement surface. A second embodiment comprises a bore securable to a lathe table via both fastening and positioning mechanisms where the bore defines a dovetail groove receivable to a complementary tongue where the toolholder is securable to the bore in a cam locking mechanism.

Abstract: A rotating turret (10) having an outer plate (12) with several interchangeable tool (13) posts mounted to an index plate (22). The index plate (22) is mounted to a first axle (23) that extends through a block (24) and rotates on a set of bearings (28) mounted inside the block (24). The index plate (22) provides for rotation of the turret (10) between the several tool (13) positions. The index plate (22) is locked into position by a set of pins (34, 37) that fit into apertures (31) in the index plate. The pins (34, 37) are spring-biased toward the index plate (22) by springs (52, 55, and 58). A handle (16) attaches to a second axle (40) to provide a quick release mechanism. The second axle (40) mechanically engages with the pins (34, 37) and a sliding wedge (49) such that when the handle (16) is rotated the pins (34, 37) are retracted from the index plate (22) against the force of the springs (52, 55, 58).

Abstract: The present invention relates to a portable electric drill having a rotatable magazine containing multiple tool bits from which a single bit may be selected for use. The magazine is in the form of an approximate 120-degree segment of a cylinder with a plurality of open grooves for holding the various bits. The drill includes a Jacobs-type chuck assembly with a bore into which the selected bit is inserted for use. The magazine may be rotated to position any one of the magazine grooves into axial alignment with the bore of the chuck, so that the user may index the magazine to position a selected bit for expulsion from a particular magazine groove into the chuck. The chuck may then be tightened around the selected bit and the electric motor actuated to drive the bit. A cable assembly within the drill housing is operable with an exterior button to be movable between a stored position and a forward position to push a selected bit from a groove on the magazine into the chuck assembly.

Abstract: There are provided a pair of positioning engaging members (27) which are engageable with or disengageable from each other between a base table (10) and a turret (11), and the turret (11) is prevented from rotating when the positioning engaging members (27) engage with each other. The turning of a ball screw (21) or a nut (25) is changed to a linear motion of the turret (11) by a screw feed mechanism comprising the ball screw (21) and nut (25) for performing engagement and disengagement between the positioning engaging members (27). The screw feed mechanism is driven by a first motor (24), and the turret (11) is indexing by a second motor (32).

Abstract: A chamfer forming apparatus for a crank shaft oil hole is provided with a spindle chuck which is variably moved in response to different locations of a crank shaft oil hole inlet portion. The invention includes linearly translating rack gear driven by an oil pressure cylinder, a pinion gear driven by the rack gear, a drum coaxially mounted to the pinion gear, a spindle chuck eccentrically rotatably mounted to the drum, a chucking a chamfer working tool, an adjusting bracket fixedly mounted to top end of the drum, a stopper member on two sides of the adjusting bracket, and a fixing bracket provided on the housing to limit the rotation of the drum within a predetermined angle range by contact with the stoppers.

Abstract: A robotic turret tool for use with an industrial robot is mountable onto the spindle of the robot and capable of having multiple tools mounted thereto. The turret tool includes a mounting bracket adapted to be affixed to the spindle of the industrial robot, the mounting bracket including a locking element support. A turret shaft affixed to said mounting bracket. A turret head is rotatably supported on the turret shaft with multiple tools attached to the turret head allowing the robot to select which tool to use through rotation of the turret head. A locking element is slidably mounted in the locking element support. The locking element including an upper electrical supply connector and an upper pneumatic supply conduit path. The locking element is movable from a locked position engaging said turret head to an unlocked position away from said turret head.

Abstract: A turret head device for machine tool comprises a housing; a motor mounted on a rear surface of said housing; a first and second planetary gear mechanisms, both integrated into the housing; a turret for mounting tools; and a tool driving shaft integrated into the turret.Wherein said turret is connected with said motor through said first and second planetary gear mechanisms and the tool driving shaft is connected with the motor through the first planetary gear mechanism.

Abstract: A tool turret has a housing, a head connected nonrotatably with the housing, and a tool face arranged concentrically to and encompassing the head. The tool face is rotatable around the housing longitudinal axis relative to the housing and head, and is lockable in predetermined angular positions with the housing. A receiving and holding area for a drivable tool is provided in the tool face. A head shaft extends radially in the head relative to its central longitudinal axis. The head shaft can be driven through a miter-wheel gearing and a transmission shaft extending in the rotary axis of the tool face by a motor. A clutch is movable in a longitudinal direction along the head shaft axis relative to the driving shaft of a tool found in the work position, to join the head shaft and the tool shaft.

Abstract: A machining apparatus is disclosed which includes a rotatable tool turret having a plurality of modular machine tools removably supported thereon in circumferentially spaced apart relationship, a transmission assembly for effectuating the indexed rotation of the tool turret, and a multi-disc variable-speed drive system for independently driving each of the modular machine tools supported on the tool turret.

Abstract: A machine tool includes a machine table for receiving a workpiece, a headstock disposed above the table, a turntable mounted on an underside of the headstock and being rotatable relative thereto about a vertical first axis, and a spindle mounted on the turntable for movement in a direction oriented radially relative to the first axis. The spindle includes a chuck for supporting a machining tool for rotation about a second axis oriented eccentrically relative to the first axis. The spindle is rotatable relative to the turntable about a third axis oriented orthogonally relative to the first axis. A second spindle can be mounted on the turntable for rotation about the first axis.

Abstract: The invention relates to a dual tool-carrier for hand drills with the following features: two shafts are provided each for mounting one tool e.g. drill chuck, screw attachment etc.;the shafts form an angle with one another which swivels the tool not being used out of the working area;a fixture is provided, said fixture frictionally connects alternately the axes with the driving shaft of the drill.

Abstract: A machine tool having a frame, a turret on the frame having a spindle for holding an operating tool, structure on at least one of the frame and turret for operating the spindle to effect machining of a workpiece by an operating tool held by the spindle, and first structure on at least one of the frame and turret for communicating fluid in a flow path from a pressurized supply to a workpiece to be machined by an operating tool held by the spindle to effect deburring/washing of the workpiece.

Abstract: A drilling tool is adapted for incorporation into a riveting robot. For this purpose, the drilling tool with its spindle head is mounted on a slide that is motor driven for displacement in the Z-direction of an XYZ coordinate system. The slide in turn is mounted on a console provided with a flange to be secured or docked to the riveting robot. The console is rotatable about its longitudinal axis that extends perpendicularly to the drill spindle axis and intersects the latter approximately in the center of the spindle axis. The drill spindle is rotatably mounted in a spindle head and carries a drive wheel approximately in the center between the spindle ends. The drive wheel is meshing or cooperating with a power transmission train from a motor that is also secured to the slide and moves up and down with the slide and thus with the spindle head. Another motor drives the up and down movement of the spindle head. This type of arrangement permits positioning the drill bit in difficult locations.

Abstract: Tool turret for a machine tool, the turret head of which is designed to be equipped with drivable tools, wherein for shortening the times required for indexing the rotatable turret head a three-part HIRTH tooth system is used to lock the turret head and a coupling which is constructed such that it can be disengaged by rotation of the turret head is provided between a drive shaft of the tool turret and a tool spindle of a drivable tool.

Abstract: A turret machine tool has a slide table mounted on a machine base for movement toward and away from a workpiece to be machined. A turret head is indexably mounted on the slide table, and a plurality of multispindle heads mounted on the turret head at spaced angular intervals in an indexing direction of the turret head, each of the multispindle heads having a plurality of spindles disposed therein. A plurality of machine tools mounted on respective ends of the spindles, and a plurality of spindle gears are mounted on the spindles, respectively. A driven gear is mounted in each of the multispindle heads in mesh with the spindle gears through a train of gears. A drive gear is axially movably disposed in the turret head for movement into and out of mesh with the driven gear in one of the multispindle heads which has been indexed.

Abstract: An automatic machine for performing framing operations on a power pole. The machine is controlled by a programmable logic control and interchangeable programs are provided to control the operation of the machine according to a pole frame specification. Poles to be framed are received on a primary conveyor. The poles are sequentially scanned for length and position and are transferred in sequence to a longitudinal feed station where the poles are oriented on a first set of supports. An end of the pole is clamped to a movable carriage to maintain the pole orientation. The pole is fed through a movable rotatable tool ring either by movement of the pole clamp carriage or movement of the tool ring. The tool ring supports tooling to perform the framing operation on the pole. The programmable logic control coordinates the movement of the pole clamp carriage, the movement of the tool ring and the rotation of the tool ring to position the tools in the proper relation to the pole.

Abstract: A turret machine tool includes a support base, a slide base slidably mounted on the support base and having a slant surface, a turret head indexably disposed on the slant surface of the slide base for indexing movement about an axis, and a plurality of machining spindle modules mounted on the turret head at equal angular intervals about the axis and projecting radially outwardly from the turret head. The turret head has a plurality of attachments each including an outwardly open cavity and an attachment frame defining the outwardly open cavity and having an outer attachment surface. Each of the machining spindle modules has a front module portion, a rear module portion extending rearwardly from the front module portion, and a front plate integral with the front module portion and disposed between and coupled to the front module portion and the rear module portion, the front plate having a attachment edge extending radially outwardly beyond the rear module portion.

Abstract: Disclosed is a portable electric power drill having a rotatable cylindrical magazine within the drill housing for storing a tool bit element in each of its plural bores, the magazine being rotatable to bring a selected magazine bore in alignment with the central bore of a chuck assembly at the front of the drill. A flexible cable is slidable by hand between forward and rearward positions to eject a tool bit element from the magazine to the chuck and to return a tool bit from the chuck to the magazine, and the drill includes mechanism to allow the chuck to be tightened and loosened without the use of a chuck key, or without having to otherwise manually grasp the chuck or associated rotatable parts.

Abstract: A non-contact rotation waterproof and dustproof method and a machine tool using the same. A viscous fluid is continuously or intermittently supplied to a labyrinth clearance formed between a rotating body and a fixed body from a fluid supply device so as to fill the viscous fluid into the labyrinth clearance to obtain a good non-contact rotation waterproof and dustproof method even when the rotating body is rotated at a low speed or is stopped.

Abstract: A work holding device is intended for use in combination with a processing machine, such as an assembling apparatus, an industrial robot or a machine tool. The work holding device comprises a base plate (8), a slide base (9) supported for vertical movement on the base plate (8), a swivel head (10) supported for turning on the slide base (9), and a rotary table (11) supported on the swivel head for rotation about an axis perpendicular to the axis of turning of the swivel head. The slide base (9), the swivel head (10) and the rotary table (11) are controlled properly to set a work (12) held on the rotary table (11) in an optional position relative to the associated processing machine. The work holding device and the processing machine are controlled for synchronous operation by a single controller according to a control program.

Abstract: The invention relates to a multi-spindle boring machine with machine table and suction arrangement in which the spindles are held on a carrier, which can be rotated by means of a vertical drive shaft, and in which an extractor fan can be connected to a suction duct, which ends in the area of the tool set in the working position and received by the spindle. With a central suction unit and individual exchangeable tool coverings, which can be connected with a covering distributor with connecting ducts to the central suction pipe, the invention provides for optimum suction, which can be adjusted to the different tools used.

Abstract: The invention relates to a boring machine, particularly for woodworking, for boring rows of holes and structural bores in plate-shaped workpieces such as cabinet sidewalls, cabinet doors, etc., with a machine frame having a workpiece holder and an adjustable multi-spindle boring assembly arranged over the workpiece holder, a fixed, longitudinally oriented workpiece stop being mounted on the back of the workpiece holder, and which has a stop fixture consisting of stop rails aligned parallel to and projecting laterally at the longitudinal sides of the workpiece holder and whereat adjustable and lockable stop receivers can be introduced into the stop rails, the stop receivers receiving spring-loaded stop platelets, which project at the surface of the workpiece holding fixture, but which can be brought into a pushed back position.

Abstract: The invention relates to a boring machine, particularly for woodworking, for boring rows of holes and structural bores in plateshaped workpieces such as cabinet sidewalls, cabinet doors, etc. with a machine frame having a workpiece holder and a boring assembly displaceable on guide rails, in which machine the workpiece holder. a workpiece stop and a stop arrangement with position fingers adjustable and lockable in the displacement direction of the boring assembly, which, in connection with the boring assembly, determine the boring position along the displacement path of the boring assembly.Presetting of boring patterns with a number of bore rows is carried out by means of position rollers having a number of holding rails in which fingers can be prepositioned. The fingers cooperate with finger receivers to determine the positions of the boring assembly.

Abstract: The device is provided on a machine tool, wherein the drilling or milling operating head (12) comprises an axially movable spindle (14) and a workpiece hold-down (17), and wherein the working depth is controlled according to the relative position of the tool (16) with respect to the hold-down (17), defined by sensing a reference member (56) by means of the tool (16). To avoid the errors due to the thermal expansion in defining the reference position between the tool and the hold-down, before the reference member (56) is sensed, an electric power supply heats the spindle (14) by sequentially energizing the phases of the statoric coil of the spindle electric motor (76). The reference member (56) comprises a proximity sensor (64) operated by the tool (16) through an air pad piston (67).

Abstract: A hollow column is provided for a tool turret with a housing that is to be connected to a machine tool or the like, with a drive motor, and with a tool disc which has receptacles for tools, the tool disc being mounted rotatably relative to the housing and being lockable in selectable angular positions. The hollow column is nonmoveable relative to the housing. A shaft which extends in the longitudinal direction of the column, and which can be driven by the drive motor is disposed within the hollow column. That tool, which is inserted into the receptacle that is situated in the working position, can be driven by the shaft. At least one line is provided in the column so as to be part of a system provided for the transfer of energy, lubricant, coolant, pressure or the like.

Abstract: A revolving head for machine tool including one fixed frame, one spindle-bearer turret movable in rotation with respect to this frame, at least two tool bearer spindles fitted to the turret, rotation devices for the spindles and automatic driving devices to rotate the turret. The turret includes a first element secured to the frame and a second element movable with respect to the first element. The automatic driving devices includes an axial piston and a rotary piston to move respectively axially and in rotation the second element of the turret with respect to the first element.

Abstract: Disclosed is a structure of a turret head provided with turning tool mounting mechanisms and revolving tool mounting mechanisms on the turret, wherein a turning tool can be mounted on the revolving tool mounting mechanism rotatably mounted on the turret. The turning tool is mounted on the turret at a holder of the tool for positioning and at the same time is tightly affixed to the revolving tool mounting mechanism at the tapered portion of the tool.Also provided is an engaging and disengaging mechanism for engaging and disengaging a gear of a unit drive shaft relative to a gear of a revolving tool mounting mechanism in preparation for mounting a revolving tool different in direction.This feature enables a revolving tool different in direction to be driven.Another feature is a provision of a lock gear. Locking the lock gear allows the revolving tool mounting mechanism to be employed for turning tools. The revolving tool mounting mechanism can be used for revolving tools when the lock gear is unlocked.

Abstract: A turret tool post for a machine tool has a turret having a plurality of turret faces each equipped with a tool for machining, a turret shaft for rotating the turret, a cam follower provided on the turret shaft, a cam having a cam surface engaged with the cam follower to cause the cam follower to rotate, and an indexing motor for driving the cam to index the turret faces. A straight raceway portion is formed on the cam surface of the cam so that the cam follower is not driven to rotate through a predetermined angle. Also disclosed is an apparatus for controlling indexing of the turret tool post which has a turret controller for controlling the rotation of the indexing motor. The speed of the indexing motor is controlled in accordance with whether a door attached to a cover covering the turret and other elements is open or closed.

Abstract: The present invention provides an electric power drill having a magazine containing a multiplicity of bits from which a single bit is selected using a bolt action. The magazine is cylindrical and is rotated about a central axis to select a bit. The bit is loaded into the chuck by forward motion of the bolt and is tightened into operating position by the chuck. The bit is removed from the chuck by retraction of the bolt.

Abstract: A machining apparatus for machining a work piece wherein the work piece is held above the work stations of the machine tool base so that chips will fall downwardly during machining operations. The tools are successfully indexed to the work station so that chip removal need be accomplished only at a single place and to make the arrangement more compact.

Abstract: A tool bit selection device as an accessory for a hand held commercial drill motor is disclosed. The selection device is in the form of a chambered cylinder that is supported on the face of the drill motor. The chambers of the cylinder hold individual tool bits that are adapted to be placed on the driving end of a drive spindle of the drill motor. The support and alignment of the selection device on the drill motor permits the compliance of the tool bit and the drive spindle in pitch, yaw, roll and radial offset. The selection device merely stores and positions the tool bits and does not provide bearing support of the tool bit when in working position.

Abstract: A machine tool which has a chassis, a chuck support rotatably mounted on the chassis and removably carrying a plurality of chucks in a circular row and each holding an associated rotatable processing tool and a chuck carrier operable to remove one of the chucks, carried by the chuck support and brought to a predetermined position relative to the chassis, from the chuck support, and a chuck drive unit for driving the chuck, removed from the chuck carrier, to bring the processing tool into a condition ready to process a workpiece.

Abstract: An automatic tool changer includes a main spindle having a bore inside, a chuck provided at an opening of the main spindle, a plurality of tools accommodated in the bore of the main spindle, wherein the tools are individually slidable axially of the main spindle, means for pushing the tools toward the opening of the main spindle, thereby replacing a first tool on the chuck with a second tool accommodated in the bore of the main spindle.

Abstract: A turret head unit includes a turret head, a plurality of angularly disposed tool receiving spindles carried in the turret head, a spindle drive shaft rotatably mounted in the turret head, a clutch mounted on the spindle drive shaft and movable into and out of driving engagement with a tool receiving spindle in a working position, a turret rest rotatably supporting the turret head, indexing means including a main cam mounted in the turret rest and a disc-like pin wheel coaxially secured to the rear end of the turret head and adapted to engage the main cam so as to impart a rotational force to the turret head, clamp means including a first auxiliary cam mounted in the turret rest and a clamp member engaged by the first auxiliary cam for exerting a clamping force to the turret head in its indexed position as the first auxiliary cam rotates, and clutch operating means including a second auxiliary cam mounted in the turret rest and a cooperating member engaged by the second auxiliary cam for engaging and disengag

Abstract: A rotary drilling machine for forming holes of selected size and spacing in continuous strip material such as elastomeric gasket stock used for the manufacture of gaskets for door openings and the like. This machine has a rotary drum unit which carries the strip material along a portion of its peripheral edges. A plurality of drilling units are mounted on this drum unit so as to move with the strip material. The drilling units are oriented toward the peripheral edge, and these drilling units are moved radially in a proper sequence whereby drill bits thereof move toward the strip material to dril the holes and then retract. Tensioning elements produce friction between the strip material and the periphery of the drum unit to accomplish the movement thereof in unison. The tensioning elements, in a preferred form, have signal generating elements whereby the speed of rotation of the drum unit is controlled to prevent sag in the run of the strip material.

Abstract: A machine tool with a vertically reciprocating spindle head has an automatic tool changer including a rotatingly indexable tool support connected to the machine tool frame and vertically movable independently of the spindle head, a first cam-and-crank mechanism activated by spindle head vertical movement to move the tool support with the spindle head during a first portion of the tool changing operation and away from the spindle head during a second portion of the tool changing operation, a second cam-and-crank mechanism also activated by spindle head vertical movement for opening and closing a tool holder on the tool support during another portion of the tool changing operation, a tool holder with a pair of rotatably supported L-shaped fingers which hold a tool in a substantially perpendicular direction to the axes of finger rotation, a tool taking device for taking a tool out of a tool magazine, and a vertical stop for preventing vertical movement of the tool support with the spindle head into the machining

Abstract: A drilling machine operable to drill holes in desired patterns and diameters in circuit boards and similar items and the machine is provided with a base upon which a planar support is movable parallel to the base respectively in directions transverse to each other by power mechanism, an elongated support mounted above the planar support in parallelism therewith and at least one turret-like head is rotatable about the axis of and is supported by the elongated support.

Abstract: An automatic tool changer in a machine tool for automatically changing a tool. The machine tool includes a main frame, a main spindle head movably provided to the main frame, a main spindle rotatably disposed in the main spindle head, the main spindle head being movable in an axial direction of the main spindle, and a tool magazine provided with a rotatable magazine base for holding a plurality of tool holders and for rotationally indexing one of the tool holders, whereby the one of rotationally indexed tool holder is changed by a tool holder provided at the main spindle. The automatic tool changer comprises; a plurality of tool holder gripping means radially arranged on and pivotably supported to the magazine base, the tool magazine being secured to a stationary portion of the main frame, and means for pivotting one of the tool holder gripping means rotationally indexed independent of remaining tool holder gripping means.

Abstract: A program-controlled machine tool is described, for machining workpieces by means of rotary tools which can be brought into engagement with a workpiece under timewise control. The workpiece is disposed on a cross table which rests on a program-controlled rotatable workpiece table which in turn is guided along a first main axis. The tool support region has a vertical support post which bears on its top a translational carriage which is vertically adjustable and is movable in a direction perpendicular to the vertical. Such carriage further bears tool mounts. The mounts comprise a common revolving head the rotational axis of which coincides with the vertical movement axis of the said translational carriage. The revolving head has at least two program-controlled rotatable tool tables the rotational axes of which perpendicularly intersect the rotational axis of the revolving head in a single point. The rotatable tool tables are also program-controlled and bear holding members for various working units, e.g.

Abstract: An automatic tool changer for a machine tool of the type having an upstanding spindle rotatably mounted to a spindlehead for joint vertical displacement therewith between a lower machining position and an upper retracted position via a tool change position therebetween. The tool changer includes an indexing tool magazine rotatable about a fixed slanting axis and carrying a set of cutting tools at prescribed angular spacings for successively bringing them to a position of axial alignment with the spindle. Also included are a chuck control cam for controlling the chucking and unchucking of the successive cutting tools to and from the spindle, and a gripper control cam for actuating a pair of gripper jaws releasably holding each cutting tool on the tool magazine. The tool magazine, chuck control cam and gripper control cam are all driven mechanically from a common drive motor for quick, reliable tool changing operation.

Abstract: A machine tool comprises an upstanding column, a tool-driving unit vertically movable on the column, and a pair of guide rails on a front surface of the column to extend vertically thereon and horizontally spaced apart from each other for guiding the upward and downward movement of the tool-driving unit. The tool-driving unit includes a lift frame on the guide rails and a tilting-type turret head which is supported on a front surface of the lift frame and is rotatable about an axis inclined relative to the longitudinal direction of the frame in a horizontal plane. One of the pair of guide rails is relatively disposed forwardly of the other guide rail, so that the individual guide rails both assume positions close to the turret head thereby to minimize the amount of overhang of the tool-driving unit.

Abstract: A method and arrangement for exchanging a variable number of tool holders in which only one tool holder at a time is brought into working position. The operations involved with accessing a variety of holders, one at a time, to a working position requires movement of minimum mass to the working position adjacent the drive unit--while one or more remaining tool holders are located in a series of accessible independent storage positions or in at least one storage magazine.

Abstract: An electrical discharge machine including a pick-and-place system for transferring electrode refeed cartridges from a storage turret to an EDM work station from either one or two indexable turrets. A plurality of equally spaced electrode cartridge assemblies are each removably mounted on each turret by magnets and guide pins. A slide assembly is vertically positioned between a cartridge assembly load and unload elevation and an EDM work station elevation. The slide assembly includes a movable connector plug assembly selectively driven by an EDM cylinder fixed on the slide assembly. The connector plug assembly supplies refeed cylinders on a slide mounted cartridge assembly and vertically reciprocates a power connector receptacle and drive head on such cartridge assembly. The receptacle and drive head include an electrode guide board guiding one or more electrodes with respect to a workpiece.

Abstract: A machine tool with a vertically reciprocating spindle head has an automatic tool changer including a rotatingly indexable tool support connected to the machine tool frame and vertically movable independently of the spindle head, a first cam-and-crank mechanism activated by spindle head vertical movement to move the tool support with the spindle head during a portion of the tool changing operation, a second cam-and-crank mechanism also activated by spindle head vertical movement for opening and closing a tool holder on the tool support during another portion of the tool changing operation, and a vertical stop for preventing vertical movement of the tool support with the spindle head into the machining region.

Abstract: An externally indexable turret-like device is provided, for use particularly with a lathe, screw machine, automatic machining center or the like, in which the indexable turret-like device cooperates with an external index member mounted on the machine to effect tool-indexing movements. In a principal illustrated embodiment, the index member is fixed to the headstock of the turning machine. The indexable turret is mounted on the tool-holding slide, which is movable by numerically controlled motors or the like. When indexing is desired, the tool support is moved to and into pressure contact with the fixed index member, which mechanically actuates the device through one index position. The device is then returned, by means of the programmed numerical control arrangement, to a cutting position.

Abstract: .[.A method of.]. .Iadd.Apparatus for .Iaddend.machining a workpiece, which is rotatable about a first axis, by a tool pivotable about a second axis parallel to the first axis and drivable about a third axis perpendicular to the second axis. To allow the circumference of the workpiece to be machined off-center without the necessity of moving the first or the second axis transversely to the plane defined by these two axes, the workpiece and the tool are rotated or pivoted about the first .[.or.]. .Iadd.and .Iaddend.second .[.axis.]. .Iadd.axes.Iaddend., respectively, at the same time, in the same direction and at the same angular velocity and, simultaneously the second axis is displaced transversely to the first axis at such a velocity that the equation X.sup.2 =Y.sup.2 +A.sup.