Abstract: For changing the tool disk connected detachably and rotatably to the housing of a tool turret, a work-locating fixture is provided. The tool disk can be moved out of its work setting in which it is coupled with the drive shaft for rotation by a rotary drive. The tool disk movement is in the axial direction of the drive shaft away from the housing until the tool disk reaches transfer position. The drive shaft and a tie rod coupled to the drive shaft are then rotated by the rotary drive out of a connected setting into a detached setting. In the detached setting, the connection between the tie rod, which tie rod is slidable in its axial position relative to the housing and the tool disk, is disconnected, so that the tie rod can then be lifted out of the tool disk.

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: A transmission mechanism for a milling device and an improvement in a ram type milling device having a swivel head structure. The ram is movable in opposite longitudinal directions. An auxiliary section is rotatably coupled to the ram for 0.degree.-360.degree. rotation relative thereto. An input head section that carries the output shaft, is rotatably coupled to the auxillary section for 0.degree.-360.degree. rotation relative to the auxillary section and/or the ram. The machine body of the device has a shaft hole formed therein for receiving one of the ends of a milling tool carried by the output shaft. Guide rail and guide feet are also provided for supporting and guiding the milling tool when desired. A milling tool carried therein by this device may be selectively moved in any of six directions or planes, as desired or needed for working on a workpiece.

Abstract: Automatic machine tool head designed for the assembly of mechanical sub-assemblies such as aircraft, automobile and vessel structures, etc., comprising equipment used for rapid coupling and changeover of multi-task end effectors (MTEE), the equipment presenting a pair of Cartesian axes after two polar axes.

Abstract: A milling machine cutter tool structured and oriented to perform complex three dimensional contour machining operations and provides for the cutting edges of the cutter to engage the workpiece in the same direction as the feed direction, thereby resulting in maximal cutting efficiency. The cutting tool is composed of a sleeve rotatably mounted to the milling machine, a quill axially movable in the sleeve, a position drive for selectively moving the quill relative to the sleeve, a drive shaft rotatably supported in the quill and connected at a rear end thereof to a cutter drive, a cutter head connected to the opposite forward end of the quill, a worm gear set mounted in the cutter head connecting gearably to the drive shaft, a cutter shaft mounted in the cutter head transversely in relation to the drive shaft and gearably connected to the worm gear set, and a side cutter connected to the cutter shaft, the side cutter supporting teeth extending forwardly of the cutting head.

Abstract: A multi-axis, remote control, mobile, robotic machining center of Cartesian structure having three mutually perpendicular X, Y and Z linear movement axes in which an elongated horizontal ram, adapted to carry various working tools at one outer end thereof, is rigidly supported on a vertical pedestal for movement along the vertical Y axis and linear Z-axis. The ram also is mounted for rotational movement about a horizontal A axis normal to the Y axis and is thereby capable of being selectively positioned in either of two horizontal operating attitudes in which the working tools are operably disposed on opposite sides of the pedestal.

Abstract: The invention relates to the chuck unit of an operating head for automatic machine tools in which the operating head is the type comprising a fork, fitted to the end of a mobile arm and equipped with a number of degrees of freedom, to which the chuck unit is hinged; the chuck unit comprises a chuck and equipment designed to rotate the chuck so that it slides axially.The unit in accordance with the invention is designed for use with a brushless motor and automatic equipment which varies the velocity ratio between the said motor and the chuck.

Abstract: This invention relates to a machine tool having a table for mounting a workpiece. The body of a machine tool is equipped with a table for mounting a workpiece. The table is further equipped with a rotary table. When performing turning operations of the workpiece, the workpiece is mounted on the rotary table. On the other hand, when performing other operations, except for the turning operation, the workpiece is mounted on the non-rotary table. In addition, if desired, the workpiece can be mounted on both the table and the rotary table for performing other operations.

Abstract: This invention is related to a vertical milling machine ram adapter and particularly to one which has a U-shaped body with revolving mechanism set at both lateral sides and the front end to permit the connected milling head ram to make rotation along vertical axis as well as horizontal axis against the overarm of the milling machine so as to perform complicated milling process. The revolving mechanism is comprised of an adapter locking bolt and a circular groove, which adapter locking bolt is inserted through the ram adapter to connect the ram adapter to the overarm or the milling head ram of the milling machine.

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: The drive means (3) is arranged directly on the tool (2) and can be moved together therewith about a plurality of axes (A, B, C and D). The drive means is provided with a tool holding means for automatically delivering or receiving tools in a tool magazine (5) which is arranged above the region of operation of the tool (2). In that way a plurality of tools can be operated with a single drive means, wherein the tool guidance, workpiece forward feed and interchange of tools can be fully automated and programmed.

Abstract: A machine tool includes a first movable base movable in a horizontal plane in a first direction, a second movable base mounted on the first movable base and movable toward and away from a workpiece in the horizontal plane in a second direction transverse to the first direction, a support base mounted on the movable base, and a spindle stock supported on the support base and rotatable about a center in a vertical plane. A spindle device is mounted on an outer end of the spindle stock at a position off the center. The spindle stock may be an arm rotatable about a longitudinal center thereof, or substantially disc-shaped. The support base has an annular support member disposed on a front surface thereof coaxially with the center, the spindle stock includes a slidable member held in slidable contact with the annular support member.

Abstract: A tool changer has a pair of chucking units mounted respectively on the ends of a tool arm and movable in mutually opposite directions for simultaneously gripping tools, the tool arm being angularly movable 180.degree. for changing tools. The tool changer is used in a machine tool having a spindle device for holding and rotating a tool about its own axis and a tool magazine for storing a plurality of tools to be mounted, one at a time, on the spindle device. The tool changer comprises a tool arm disposed between the spindle device and the tool magazine, the tool arm being angularly movable about an axis parallel to an axis of the spindle device and movable along the first-mentioned axis, a pair of chucking unit mounted respectively on ends of the tool arm and movable in mutually opposite directions passing through the first-mentioned axis for simultaneously gripping tools, respectively, and a mechanism for actuating the tool arm and the chucking units.

Abstract: A bench type milling cutter includes a bearing block assembly which is a bearing block assembly which is carried by a carrier and which is linearly vertically adjustable relative to the carrier by means of a manual actuator. The carrier, in turn, is mounted on a slide for rotation relative to the slide within a vertical plane containing the tool axis, such rotation created by a manual actuator. The slide is movable horizontally relative to the work bench so that the tool may be displaced horizontally in relation to the workpiece.

Abstract: Apparatus for cleaning the inside of a metallurgical vessel including an inclined foundation and ways on the inclined foundation to support the carriage of a mobile cleaning device. The mobile cleaning device has a carriage which moves along the ways on said inclined foundation. The mobile cleaning device has a pivotally mounted boom with a rotary shaft having a cutting head mounted on its end and bits on the cutting head. A support stand is located adjacent the upper end of the inclined foundation for holding a metallurgical vessel in a stationary position during cleaning.

Abstract: Lathes usually have only two axes of movement for the tool, namely the directions of the displacement of the saddle and cross rest. Since power-driven tools are increasingly being used, especially in NC lathes, in which radial and axial slotting is performed on the workpiece with end mills, for example, there is a need, for example, to vary the width of the slot by slightly shifting the tool in a third direction perpendicular to the first two directions of movement. Precisely in the case of slotting, no continuous adjustment is necessary, as it would be very costly to achieve mechanically. Instead it is sufficient to be able to reach two or three fixedly specified, changeable positions. This can be achieved by an arcuate movement of the tool which will also contain components of the desired third direction of movement, and this can be achieved mechanically either by rotating a part of the tool head or by an eccentrically configured tool socket.

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 machining device includes a toolholder (24) displaceable in three coordinates (X, Y, Z) perpendicular with respect to one another by means of three linear guides (23, 15, 28) and associated drives (25, 19, 30) on a frame of the device. The device is characterized in that the frame (1, 8) of the device is of an essentially U-shaped configuration and that the toolholder (24), retained in a shape-mating fashion, is displaceable on a carriage (23) extending transversely to the legs (1a, 8a; 1b, 8b) in the first coordinate direction (X) and the third coordinate direction (Z). This carriage, retained in a shape-mating fashion with its ends (22) on the legs (1a, 8a; 1b, 8b) of the frame, is displaceable along the legs in the second coordinate direction (Y). Preferably, the frame of the device consists of a U-shaped supporting stand (1) and of a rotary stand (8) having a U-shape and being swivelable thereon, the toolholder (24) being displaceable on the rotary stand in the three coordinate directions.

Abstract: A tactile sensing tool positioning system for positioning a tool normal to the surface of a curved workpiece is disclosed. The tool positioning system of the present invention includes a steel frame for rigidly supporting a cutting tool having a longitudinal cutting implement, such as a drill bit or countersink bit. The steel frame includes a steel collar which is normal to the axis of the cutting implement and which supports a deformable ring of polyurethane or other resilient material. A plurality of aluminum cylinder positioning sensors are imbedded into the steel collar and surrounded by the deformable ring with one end of each aluminum cylinder positioning sensor contiguous with the exposed surface of the deformable ring. The axial loading experienced by each aluminum cylinder positioning sensor is measured by an associated strain gauge, and a quadrature circuit is then utilized to balance the forces on the aluminum cylinder positioning sensors and normalize the longitudinal cutting implement.

Abstract: A machine tool has a base (6), a XY table (5) arranged at the base (6) for holding a work (W) thereon in such a way that the XY table (5) can move together with the work (W) in a first direction and a second direction perpendicular to the first direction, means (2, 3) for controlling the XY table (5), an indexing table (17, 67) placed above the XY table (5) in such a manner that the indexing table (17, 67) can move for the indexing purpose, and a plurality of spindle heads (24, 25, 44, 45) attached to the indexing table (17, 67).

Abstract: The present patent of invention relates to an edging machine that permits the machining of two opposite sides of a chain even contemporaneously. The machine consists essentially of a vice (4) for gripping and feeding the chain, the said vice showing a central supporting disc (16) which is journalled on a rotating shaft (3) and cooperates with circular plates (10, 15) presenting opposed inclinations. The machine is provided on its upper part with a stirrup (19) with slots (20) shaped like arcs of circle, in which edging means (21) are inserted and regulated.The arrangement and adjustment of both the gripping and feeding vice (4), and edge elements (21) allow both opposite sides of a chainlet, or single sides of two chainlets, to be machined quickly, precisely and contemporaneously according to the wished angle and depth of engraving.

Abstract: Surgical apparatus for use in contouring medical implants comprises a transparent enclosure adapted to be located on a metallic work surface in an operating theater, the enclosure being sized to enable manipulation of an implant therein by a surgeon for contouring, a stand connected to the enclosure for adjustably positioning and fixing a surgical drill in a preselected orientation with respect to the work surface such that the drill bit projects throughout an opening into the interior of the enclosure, the stand carrying a magnetic mechanism so as to enable the stand to be immobilized with respect to the work surface, and a movable cutting block having a disposable cutting surface thereon. The stand is connected to the enclosure by a metal tongue, slidably carried by the stand, which is received within a slot on the underside of the enclosure, and the cutting block is formed with a magnetic mechanism so as to enable immobilization of the cutting block with respect to the tongue.

Abstract: An improved machine tool (10) has a driven cutting tool (T) which is rotatable about an axis (C) extending perpendicular to the axis (B) of rotation of a turret (200) when a toolholder (300) is mounted on an end face (203) of the turret (FIG. 7). The cutting tool is rotatable about an axis extending parallel to the axis of rotation of the turret when the toolholder (300) is mounted on a side face (204) of the turret (FIG. 10). A drive assembly (600) is operable to drive the cutting tool when it is mounted on either the end face (203) or the side face (204) of the turret. The drive assembly (600) extends through the turret and has output at a location disposed between the end and side faces (203, 204) of the turret. A pair of actuators are (400, 500) provided to operate the toolholder (300) to engage and release the cutting tool (T) when the toolholder is mounted on either the end face or side face of the turret.

Abstract: A milling machine head assembly has a milling machine head mounted on a movable carriage, for movement with the carriage and for angular movement relative to the carriage about a predetermined axis. A motor is mounted on the carriage for movement with the carriage but is maintained stationary during angular movement of the machine head. Drive power is transmitted from the motor to the machine head in any angular position of the machine head within said angular movement. For this purpose, a power transmission is twistable relative to said predetermined axis and extends along said predetermined axis through the carriage from the motor to the machine head in the form of a twistable endless belt. The power transmission may include two parallel shafts comprising a spindle shaft for operating a tool bit, and an auxiliary shaft adapted to be driven off the motor by a first belt via one end of the auxiliary shaft. A belt and pulley transmission interconnects another end of the auxiliary shaft with the spindle shaft.

Abstract: A method of 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 second axis, 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.2 always applies, wherein X is the distance of the second axis from the first axis, Y is the distance of the first axis from the plane defined by the second and third axes and A is the distance of the second axis from the vertical projection of the first axis onto this plane.

Abstract: The tool head of the cross slide of a lathe comprises a tool head housing, which is mounted in a body of the cross slide and angularly adjustable relative to said body, and a tool spindle, which is rotatably mounted in said housing and operatively connected to a drive spindle by an angle drive. To increase the range of operations by which a workpiece can be machined, the tool head housing is mounted in said body so as to be angularly adjustable on the axis of the drive spindle, which is at right angles to the longitudinal axis of the lathe, and the tool head housing is adapted to be coupled to the drive spindle or to the tool spindle.

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 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 method of 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 second axis, 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.2 always applies, wherein X is the distance of the second axis from the first axis, Y is the distance of the first axis from the plane defined by the second and third axes and A is the distance of the second axis from the vertical projection of the first axis onto this plane.

Abstract: An automatic tool changing mechanism includes a spindle mechanism (11) having at least a spindle (11a) and a first gear (11b) rotatable in unison with the spindle; a spindle motor (12) for rotating the spindle; a tool magazine (20) having at least a storage unit (20b) for storing a plurality of tools (21), a second gear (20c) rotatable in unison with the storage unit, and a slider (20e) slidably mounted on the spindle mechanism; a Z-axis motor (19a) for moving the spindle mechanism in the direction of a Z-axis; a constraining member (23) for constraining the tool magazine against movement thereof in the direction of the Z-axis and a control circuit (102, 103) for controlling the indexing. During machining operation, the first and second gears are brought out of mesh with each other, and the spindle is rotated by the spindle motor at a prescribed speed to enable a tool mounted on the spindle to machine a workpiece.

Abstract: For facilitating the rotating of a tool-receiving device, in particular an angled milling head, an elongated bushing which is concentric with respect to the milling spindle axis is secured in the milling spindle carriage. The bushing has at its free (lower) end a conical receiving opening. A support sleeve is rotatably supported in the bushing by means of radial and axial bearings. The support sleeve has at its free (lower) end a fastening flange for the tool-receiving device. Above the fastening flange is provided a centering cone conforming in shape to and fitting into the conical receiving opening. An oil film is interpositioned between the opening and the centering cone to provide a uniform support for the support sleeve. The milling spindle is supported in the support sleeve. By means of a ring gear, which is driven by a servomotor, it is possible to rotate the tool-receiving device about the axis of the milling spindle into predetermined angular positions.

Abstract: The present invention provides a drilling apparatus (10) having a drilling member (20) that is rotatable about an axis (45) for drilling a bore in a workpiece (12). The drilling apparatus (10) includes a spindle (22) which drives the drilling member (20) and advances it towards and against the workpiece surface (32). The gimbal member (18) normalizes the drilling member (20) as the bore is drilled. The gimbal member (18) guides the drilling member (20) toward a drilling point (48) which is positioned on a datum plane (44) that is substantially tangent to the surface of the workpiece (32). As the bore is drilled, the guiding member (18) guides the drilling member (20) so that the drilling axis (45) remains substantially normal to the drilling point (48) at all times while the bore is drilled.

Abstract: A horizontal drilling and milling machine having a spindle head which is rotatable about an axis set at 45.degree. relative to the horizontal. In the horizontal and vertical working positions of the spindle sleeve, the spindle head can be arrested via a support housing. In its horizontal working position, the spindle sleeve is rotatably driven exclusively by a spur gear system, and in its vertical working position is rotatably driven with the aid of a bevel gear system.

Abstract: An automatic tool changer of a machine tool comprises a spindle head (4) rotatably carrying a spindle (2), and a tool magazine (40) having a plurality of tools (42). A pair of gears (46, 48), one on the spindle and the other on the magazine, are provided to drive the magazine to index it by means of the spindle drive motor (6). The two gears (46, 48) are engaged upon the tool changing operation and disengaged upon the machining operation. The Gear engaging and disengaging are effected by the relative axial movement of the spindle head (4) and an associated slider (30) carrying the magazine (40).

Abstract: A horizontal drilling and milling machine having a spindle head which can be rotated about an axis set at 45.degree. to a horizontal plane. The spindle head can be arrested in the horizontal and vertical working positions of the spindle sleeve by means of a support housing. The spindle sleeve can be driven via a gear system. The rotary movement of the spindle head is derived from the drive shaft for the spindle sleeve.

Abstract: A grinding machine in which a workpiece, to have grinding operations carried out at different locations along the workpiece at different radii and at different angles, is mounted between centers on a slideway to present the locations on the workpiece to a motor driven grinding wheel mounted in a grinding head. The grinding head is mounted on a slideway to traverse the grinding wheel towards and away from the periphery of the workpiece. The grinding wheel is mounted on the slide for rotational adjustment about an axis extending tangential to the periphery of the grinding wheel at a location where the grinding wheel acts on the workpiece for adjustment of the angle of cut of the grinding wheel. Since the grinding wheel turns about an axis when its angle is adjusted, the position of an angle of cut is not otherwise varied by the angular adjustment of the grinding wheel.

Abstract: A swivel head swivels on its support along a plane face that is perpendicular to the axis of rotation. The face has the shape of a movable disk that slides on a stationary disk. The movable disk is rotated by means that ensure centering with a predetermined clearance. The stationary disk is pierced by two diametrically opposite bores and the movable disk is pierced by at least one pair of diametrically opposite bores with the same diameter and with the same distance between centers, and located at the same distance from the center, within the clearance. The positions of a pair of bores may be generated from those of another pair, by rotation of predetermined angle. The support features means for inserting, across the two disks, two expandable rings, for expanding them, and for retracting them.

Abstract: An adaptor for a tooling attachment employs a hydraulically actuated sleeve clamp which secures an adaptor sleeve to the spindle housing of a machine tool, the attachment being affixed to the sleeve. A coupling assembly permits locking the adaptor sleeve at selected angular positions relative to the spindle housing, indexing of the sleeve being accomplished through the use of a pinion drive and an indexing gear. Indexing of the adaptor sleeve is permitted by a clamp mechanism which engages a circumferentially extending slot of the adaptor sleeve and which causes engagement and disengagement of the coupling assembly.

Abstract: A spindle head can rotate on a support about an axis which forms, with the working plane, an angle .alpha. which advantageously equals 35.degree. 15'52"; the angle between axis of the spindle itself and the axis of rotation of the head is the complement of angle .alpha.. The projection of the axis of rotation of the head on the working plane is slanted in relation to the horizontal projection of the main axis of advance, with a slant that is preferably equal to 45.degree..

Abstract: A woodworking power tool comprising a base plate having a motor mounted thereon at one end of the base plate. The motor has a motor housing on which a spindle housing is mounted for rotation through an arc of 180.degree.. The spindle housing has a spindle therein and the spindle is adjustably mounted for up and down movement with referene to the bottom flat surface of the base plate. A toggle mechanism is carried by a handle grip on the base plate for adjustably locking the spindle housing in a fixed, rotative position on the motor housing. A shaft is rotatably mounted in the spindle and has a tool-actuated collet for releasably attaching the shank of a cutting tool to the shaft. A drive train connects the drive shaft of the motor with the shaft of the spindle to rotate the cutting tool on the end of the spindle shaft.

Abstract: A machine tool head having a spindle nutatable about a center at the front of the spindle and at or closely adjacent to the front face of the machine tool head so that the radial reaction to the cutting forces is transmissible from the spindle to the machine-tool head essentially in the plane of the front face of the machine tool head.

Abstract: A headstock for a universal milling and drilling machine. The headstock includes a horizontal spindle within the headstock housing. A swivel head to which a vertical milling head is mounted is rotatably mounted at a 45.degree. angle on the headstock and is lockable in position by a locking mechanism.

Abstract: The invention relates to a grinding machine in which a workpiece such as a multi-stage compressor or turbine rotor to have grinding operations carried out at different locations along the workpiece at different radii and at different angles is mounted between sensors on a slideway to present the locations on the workpiece to be ground to a motor driven grinding wheel mounted in a grinding head. The grinding head is mounted on a slideway to traverse the grinding wheel towards and away from the periphery of the workpiece at a location where the grinding operation is to be carried out and the grinding wheel is mounted on the slide for rotational adjustment about an axis extending tangentially to the periphery of the grinding wheel at a location where the grinding wheel acts on the workpiece for adjustment of the angle of cut of the grinding wheel.

Abstract: A machine tool head in which a rotary spindle is adapted to nutate by virtue of the spindle being mounted in a housing supported to rotate about a predetermined axis and by virtue of the housing being mounted in another housing adapted to rotate about an axis which is inclined relative to the first axis. A train of bevel gears connects the spindle to a non-nutating drive motor and maintains a rotary drive from the motor to the spindle in all positions of the spindle.

Abstract: An adjustable face milling cutter is carried on a turntable rotatable about a central axis that is coaxial with the cylindrical shell of the steam generator in which the tubesheet is located, to machine a circular path on the upper tubesheet surface. For complete circle-by-circle scanning of the tubesheet surface, the radius of the circular machined path is variable by virtue of mounting the milling cutter on the outer periphery of a circular mounting member turnable to different locked rotary positions about an off-center pivot axis on the turntable. The rotary support for the turntable is at its outer periphery, as provided by an encircling support ring which in turn is supported by a ball bearing assembly having an inner race secured to the turntable top and an outer race secured to the support ring top; teeth on the inner race being provided to accommodate a motor-operated drive gear.

Abstract: A grinding apparatus for forming and grinding complex curved surfaces such as the peritrochordal bore of rotary a combustion engine, e.g.

Abstract: A machine tool comprises a table mounted on a bed and adapted to be moved in the direction of longitudinal axis of the bed, said table being arranged to be driven or rotated, intermittently indexed and controlled of the turning position thereof; vertical columns installed in a plane extending at right angles to the bed and having vertically sliding rails or vertical slides; a cross rail mounted on said vertical slides so as to be slidably moved in the vertical direction; a saddle mounted on said cross rail so as to be slidably moved in the horizontal direction; said saddle being arranged to slidably move the ram means in a direction at right angles to said cross rail; said ram means having a lower end face on which a turning tool can be fixedly mounted; said ram means having in the front face or the side of the lower end thereof a turret head adapted to be rotated and indexed in a plane extending at right angles to said table face, said turret head having a main spindle which is adapted to be rotated or drive

Abstract: A method of 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.

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.