Abstract: A machine tool comprises a support structure having first and second opposite ends spaced apart along an axis, a drive assembly mounted on the support structure at the first end thereof, the drive assembly comprising at least one drive motor, and an output drive shaft coupled drivingly to the drive motor. The machine tool also comprises a machining head mounted on the support structure at the second end thereof, a tool support member mounted on the machining head and movable relative thereto, and a transmission shaft coupling the output drive shaft to the tool support member to effect movement of the tool support member. The transmission shaft extends parallel to the axis of the support structure over at least a substantial part of the distance of the first end of the support structure from the second end thereof.

Abstract: A boring apparatus comprises an elongate support body adapted to be rotatable by a machine tool spindle, a cutter mounting body releasably securable to the end of the support body remote from the machine tool spindle and is provided with a cutter guide which slidably receives a cutter therein which is constrained by the guide to be displaceable in an adjustment direction inclined to the rotational axis of the elongate support body. An adjustment member is disposed within the elongate support body and is movable along an axis substantially coaxial with the rotational axis of the elongate support body, and an interengaging coupling on the adjustment member and on the cutting tool is provided whereby movement of the adjustment member along its axis of motion induces movement of the cutting tool in its adjustment direction.

Abstract: The invention relates to improvements in drills for undercutting holes and in particular to expansible drills. The drill according to the invention comprises a rotatable tubular drill body having an axial bore, at least one radially extending arm attached by hinge means at one end to the drill body such that the arm is pivotal radially outwards, cutting means formed in the arm, guide means for moving the arm radially outwards, said guide means comprising a non-rotating shaft, and means for moving the shaft axially relative to the drill body towards said one end, so as to cause the arm to pivot radially outwards.

Abstract: A machine tool comprising a third carriage which is guided along a circular cylindrical guide of a second carriage by means of a static fluid bearing and which can thus rotate about an axis of rotation which coincides with a centerline of the circular cylindrical guide. A working point of a tool fastened to the third carriage lies on the axis of rotation so that an angular adjustment of the tool effected by rotation of the third carriage can take place independently of a position adjustment of the working point effected by a displacement of the second carriage and a first carriage. The machine tool can be used for the processing of surfaces, in particular in the manufacture of linear and circular Fresnel lenses for projection television screens by means of a cutting tool.

Abstract: A rotatable tool head for a machine tool includes a tool slide and a mass balancing counter slide which are radially displaceable in opposite directions. The counter slide is mounted in a central recess of the tool slide such that the mass centers of the tool slide and the counter slide move along substantially the same radial line during tool adjustments. In this manner unbalanced masses present in an arrangement where the slides are positioned in axial or radial adjacent relationship, are substantial eliminated.

Abstract: A machine tool that includes a rotary spindle having a radially movable cutter element. An axially movable drawbar within the spindle is used to move the cutter element to its retracted or extended position. A harmonic drive unit is carried on the spindle for imparting rotary movement to a cam element that has a driving connection with the drawbar. The harmonic drive unit can be controlled through a remotely-operated brake that is adapted to be selectively engaged with a reaction member that forms part of the harmonic drive unit.

Abstract: A machine tool and method for simultaneously boring, facing and back boring three bores in a differential carrier with three tools that rotate coaxially with their spindle axes. Each tool has a first slide at its free end that carries a first cutting insert for back boring a first diameter and then generating a radial face that serves as a bearing seat on the differential carrier. Each tool also has a second slide carrying a second insert for boring a second diameter. The construction, arrangement and movement of the two slides are correlated with each other to maintain the tool in balance during extension and retraction of both slides. In the preferred embodiment the first insert must be retracted when it is advanced into the carrier, extended to back bore and then retracted to generate a radial face. The second insert is at the same location circumferentially of the tool. One insert is retracted while the other insert is extended, and vice versa, to maintain the tool in balance.

Abstract: An improved method of making contact lenses that involves using an improved arbor for holding the lens. The arbor assembly includes the use of a surrounding ring having a diametrical slot that mates with pins on various orientation and cutting machines to allow operators of these machines to easily and precisely align certain marked features of the lens blank in relation to features of the various cutting machines. The marking is done with a mechanical marker for more accurate marks of the features.

Abstract: A tire grooving apparatus according to the present invention consists of a movable carriage (3) adapted to be moved at least in the direction parallel with a tire support shaft (21), a vertically movable block (32) provided on the carriage (3) and adapted to be moved freely in the vertical direction, and a pivotable arm (4), provided on the block (32), having a cutter support unit (5) at the free end portion thereof. The cutter support unit (5) of the invention is movable up and down independently of movable block (32). As the cutter support unit (5) which is attached to the free end portion of the pivotable arm (4) can be so moved up and down independently, the depth of a tread pattern groove can be adjusted and a cutting position of a cutter (6) set arbitrarily, without replacing the cutter (6), without moving the block (32) vertically and without need of a program for correcting the quantity of movement of the cutter.

Abstract: A boring device adapted to mount boring tools for automatic tool changing, in which an eccentric mounting of relatively rotatable inner spindle 11 and main spindle (2) allows radial adjustment of the tool. Relative rotation of inner and outer spindles is accomplished by axial driving of a threaded bolt (22) by an actuator motor (67), causing rotation of a nut (19) fixed to the inner spindle (11). Continued overtravel of the threaded bolt (22) past an adjustment range (47) and safety range (51) causes releasing operation of a spring biased pull rod (36) which releases a tool clamping mechanism (14) to allow automatic tool changing.

Abstract: A fine adjustment device for turning tool bits in the form of a pneumatic/hydraulic converter for converting of control signals into proportional actuating or adjusting forces with a combination of an oil pump and pneumatically controlled overflow valve, whose outlet pressure is adjustable with the help of control air.

Abstract: Contact lenses can be made by machining an inner concave surface into a plastics material blank, then mounting the blank in a lathe and machining the outer convex surface thereon. Repeated measurement with a micrometer is needed during the latter machining to ensure that the lens vertex is correctly formed. To avoid this, the sensor described herein comprises a remote laser source from which radiaiton passes the lens vertex in the blank to a detector, the items being arranged so that, when the lens has been correctly machined, a surface diffraction effect occurs at the vertex leading to a detectable signal from the detector. The basis of the technique is the projection of an image of an edge diffraction intensity distribution through a slit to the detector while the non-diffracted component of the laser beam is prevented from reaching the detector.

Abstract: Device for the automatic engagement of the feed movement and of the return movement of the tool slide of a boring head, in which a gear rim is arranged on the inside of the head housing, which gear rim is provided with radially projecting pins, on which camlike thickenings of a ring are mounted, which interacts with vertically arranged cylindrical pins, which are acted upon via spring means, the cylindrical pins being arranged in a position which is pressed downwards in such a manner that they act upon a control disc, which is in work connection with a control cylinder which has a peg, which interacts with a displaceable sleeve and serves to bring a toothed wheel with spur gearing or a second toothed wheel with spur gearing into work connection with a first gear arrangement or with a second gear arrangement respectively and that furthermore means are provided, which form part of a gear arrangement, in order to carry out the feed movement or the return movement of the tool slide.

Abstract: A lathe is provided for generating surfaces on work pieces and which includes a spindle for support of a work piece while it is revolved and against which a cutting tool is caused to traverse. A tool supporting turret assembly is provided to hold the cutting tool and effect its movement over a path under control of a cam assembly that includes a roller cam having a cylindrical surface. The turret assembly includes a cam follower having a V-shaped configuration which is caused to bear against the roller cam and to move with respect to the cam roller in a manner to result in forming of a surface on the work piece that is of a predetermined configuration through cooperative relative movement in the orientation of the cam follower with respect to the roller.

Abstract: A facing head is described comprising two slides which are arranged adjacent each other in a radial plane and on a tool adjustment for active force balancing. The slides are formed as two parallel connecting links (couplers) between two double-armed cranks of a parallel crank mechanism. On tool adjustment, the slides are moved simultaneously and oppositely to each other while they describe a part of a circular path. Guiding of the slides reduces the influence of the centrifugal force on the slide drive force. The cutting angles of tool cutting edges disposed on the slides, therefore, change only slightly on tool adjustment.

Abstract: An auxiliary shaft (16) mounted coaxially with a main shaft (5) has at the top an eccentric (17) operatively connected via grooving (20, 21) to a tool-fastening plate (13). At the bottom of the auxiliary shaft is a wheel (19) fixed to the eccentric and provided with a recess (18). The recess can engage a fixed lug cam so that a feed motor can cause both the rotary movement of the ball turner and a tool correction effected by a relative rotary movement between the main shaft and the auxiliary shaft. For the sake of accuracy, the angular displacement is limited to an area in which the displacement of the tool-fastening plate caused by the eccentric is substantially linear with the angular displacement. All rotary motions are measured during the operation by a shaft encoder (9) and communicated to a CNC system.

Abstract: A differential drive for rotation of a central shaft correspoding in contrast to a conventional axially displaced drawbar. The invention employs a harmonic drive gear arrangement having a stationary axle and a servo motor driven rotary axle to produce zero differential out of the radial spline when the servo driven axle is stationary. Servo controllled displacement occurs through rotation of the servo driven axle with a substantial reduction with respect to rotation of the stationary axle, e.g., in the order of 97:1.

Abstract: A lathe and a method of using the lathe are disclosed for forming an aspheric surface on a workpiece, in which the workpiece is mounted to a holder that is rotatably carried by the spindle, headstock and bed of a lathe, with that spindle and workpiece being rotated about the axis of the spindle with the workpiece being engaged by a forming tool which forming tool is moved through an arcuate path about an axis that is generally transverse to the spindle axis. The method and apparatus provide further for determining the time-varying angular position of the forming tool along the arcuate path, for determining the time-varying angular position of a point on the workpiece about the spindle axis and for reciprocating the workpiece holder and the workpiece held thereby relative to the lathe headstock and to the forming tool in synchronization with the movement of the forming tool and with the rotation of the workpiece about the spindle axis to form the desired contoured surface.

Abstract: An improved boring tool with a hollow boring bar and has an exterior semicircular surface and an opposite eliptical surface over a substantial portion of its length and has a circular slotted end portion, the diameter of which is sufficiently small to pass through the neck opening in the workpiece whose interior is to be machined, a piston having its rod extending through the boring bar and connecting to a linkage which also connects to a tool holder which is pivotally mounted to the enlarged slotted end of the boring bar so that the tool holder may be pivoted to position the tool secured to the tool holder for the boring of the arcuate interior surface immediately inside the neck of the workpiece responsive to axial and radial movement of the boring bar in the opening of the neck.

Abstract: An apparatus for the fine radial adjustment of a turning tool of a rotating cutter head with a first converter for converting a low pneumatic control pressure into a fluid pressure and with a further pressure converter for converting the intermediate pressure into a high working pressure for acting upon an adjusting medium, adjusts a turning tool. The first converter is stationary outside of the rotating head and is connected to the second converter, which is disposed in the rotating head, over a connection of conduits providing a rotary transmission for pressure transformation. The intermediate pressure is set higher than the control pressure, but lower than the adjusting pressure for unloading the rotary transmission.

Abstract: A tool for generating a prescription surface in a plastic eyeglass lens. A pair of replaceable, cutting elements are mounted on a tool having a spindle. Each cutting element has a solid polycrystalline diamond material forming a cutting edge for progressively shaving a surface on the backside of the lens as the tool is swing back and forth. The surface so generated need only be polished, without the conventional abrasive finishing steps.

Abstract: An auxiliary shaft (16) mounted coaxially with a main shaft (5) has at the top an eccentric (17) operatively connected via grooving (20, 21) to a tool-fastening plate (13). At the bottom of the auxiliary shaft is a wheel (19) fixed to the eccentric and provided with a recess (18). The recess can engage a fixed lug cam so that a feed motor can cause both the rotary movement of the ball turner and a tool correction effected by a relative rotary movement between the main shaft and the auxiliary shaft. For the sake of accuracy, the angular displacement is limited to an area in which the displacement of the tool-fastening plate caused by the eccentric is substantially linear with the angular displacement. All rotary motions are measured during the operation by a shaft encoder (9) and communicated to a CNC system.

Abstract: A lathe and a method of using the lathe are disclosed for forming an aspheric surface on a workpiece, in which the workpiece is mounted to a holder that is rotatably carried by the spindle, headstock and bed of a lathe, with that spindle and workpiece being rotated about the axis of the spindle with the workpiece being engaged by a forming tool which forming tool is moved through an arcuate path about an axis that is generally transverse to the spindle axis. The method and apparatus provide further for determining the time-varying angular position of the forming tool along the arcuate path, for determining the time-varying angular position of a point on the workpiece about the spindle axis and for reciprocating the workpiece holder and the workpiece held thereby relative to the lathe headstock and to the forming tool in synchronization with the movement of the forming tool and with the rotation of the workpiece about the spindle axis to form the desired contoured surface.

Abstract: In a device for facilitating the radial adjustment of a cutting edge member of a boring and turning tool with a rotatable adjusting ring (18) arranged on the outside of a tool-carrier housing, an extendible and retractable locking ram (42) can be extended from the spindle housing (7) of the machine tool, which locking ram in an extended position allows the adjusting ring to be movable to cause a radial adjustment of the cutting edge member and in a retracted position causing the adjusting ring (18) to be fixed with respect to the tool-carrier housing and the machine tool spindle (4) so that no radial adjustment is possible. The device can be automated, since the locking ram (42) can be controlled by a general machine control.

Abstract: Disclosed is a relative rotation transmitting apparatus comprising outer and inner coaxial shafts, main and sub drives, speed-reduction unit operatively connected both to the telescoped shafts and the main and sub drives with associated gear wheels, and a tool-carrier fixed to the fore-end of the outer shaft and having means for converting the rotation of the inner shaft about the longitudinal axis to the rotation about an axis perpendicular to the longitudinal axis and means for converting the rotation about the perpendicular axis to the linear feeding of a tool along the perpendicular axis, thereby permitting the tool to rotate and move radially.

Abstract: A high speed spindle has a motor and tool adjustment mechanism which aligns spaced bearing means to rigidly support the spindle shaft at high speed operation and to prevent excessive lateral loading of a bearing unit of the tool adjustment mechanism. The unitary motor and tool adjustment mechanism are joined together as a single unitary assembly which is mountable on a machine tool base without requiring alignment and pre-assembly of the motor and tool adjustment mechanism at field locations.

Abstract: An apparatus and method for forming a valve seat while the valve body is positioned in-line are disclosed. The valve reseater apparatus (25) includes stabilizers (27) for positioning the valve reseater (25) near the valve seat (21) to be repaired, as well as a cutting tool (42) mounted on a tool head (41) which is rotated by means of a revolution shaft (44) interconnected with a motor (34). The cutting tool (42) is simultaneously translated by means of translation screws (66, 67) which are controlled by means of a rotatable hand knob (56). The circumference of rotation is automatically controlled by means of a star wheel arrangement.

Abstract: Apparatus and method is disclosed for forming an elliptical surface in a mirror 10. The mirror blank is rotated about a given axis and the cutting tool tip 24 is pivoted about an axis C which is generally perpendicular to and spaced from the workpiece axis 16. As the cutting tip 24 moves in an arcuate path about point C the instantaneous radius R between the cutting tip and the C axis is adjusted by way of a linkage 34 which translates movement generated by a cam surface 36 and follower arm 32 into horizontal movement of the tool cutting tip 24.

Abstract: A rotary tool generating head with radial tool slide feed-out produced by differential rotation of central shaft. A harmonic drive gear having a stationary axle and a servo motor driven rotary axle is used to produce zero feedout of the radial slide when the servo driven axle is stationary. Servo controlled radial tool displacement occurs through rotation of the servo driven axle with a substantial reduction in rotational speed with respect to the stationary axle, e.g., in the order of 97:1.

Abstract: In the apparatus a workpiece is rotated in a fixed position about an axis. A template is aligned with and spaced to one side of this axis. A platform is positioned above the workpiece and hinged on the other side of the axis so that it can be pivoted and thereby raised and lowered relative to the workpiece. The platform can also be caused to move along the axis of the workpiece and as this occurs, a tracing pin on the platform causes the platform to be raised and lowered in response to changes in the upper contour of the template. A rotary saw or like rotary cutting blade device is mounted on the platform above the workpiece so that the cutting blade can be brought into contact with and moved along the upper portion of the rotating workpiece to cause the workpiece to be shaped. Preferably the blade and the workpiece rotate in the same direction so that they are moving in opposite directions at the point or zone where they contact each other.

Abstract: A positive drive mechanism is provided to operate an internal tube cutter. The tube cutter has a body insertable into a tube to be severed, and a wedge-shaped slide supporting a cutting wheel on a forward portion of the cutter body. The slide and cutting wheel are movable toward and away from the tube. An elongated member is mounted through the cutter body for movement longitudinally thereof in one direction to cause outward radial movement of the slide and advancement of the cutting wheel toward and into contact with the tube to cause severing of the same upon rotation of the cutter body and in an opposite direction to permit inward radial movement of the slide and retraction of the cutting wheel away from and out of contact with the tube.

Abstract: A wooden wine barrel has one end removed, and is supported by and rotated by power driven support wheels. A router type cutter head extends into the barrel on an inner end of an arm which is pivoted at its outer end so that the cutter head can follow the contour of the barrel, and means to move the barrel longitudinally with respect to the arm (or vice versa) to effect relative longitudinal movement between the arm and barrel.

Abstract: An internal flash removal unit which radially cuts flash while it is still hot and relatively soft. A drive motor and reduction gearbox mounted in a housing drive a tooling plate rotatably mounted on the housing. A cutting assembly is mounted on an arm which is pivotally mounted on the tooling plate. A hydraulic actuator causes the arm to move outward and place the cutting assembly into cutting position as rotation of the tooling plate begins.

Abstract: A method of forming a finished torus of precise dimension which can be used to form piston segments for use in a rotary actuator in which a torus workpiece is rigidly mounted on a support in such a manner as to leave a first hemi-toroidal surface of the torus workpiece exposed, the support being mounted on a suitable means to rotate the torus workpiece about a fixed axis passing through the center of the torus workpiece, the first hemi-toroidal surface of the torus workpiece being turned with a circular cutting tool by moving the cutting tool in a semi-circular path across the first hemi-toroidal surface of the torus workpiece, then flipping over the torus workpiece and mounting it on the support while leaving a second hemi-toroidal surface of the torus workpiece exposed and once against moving the cutting tool in a semi-circular path across the second hemi-toroidal surface of the torus workpiece while the torus workpiece and support are rotated about the center axis of the torus to thereby produce a finished

Abstract: A caliper machining apparatus for machining a caliper for a disc brake is disclosed which comprises: a cutter for cutting the caliper, a facing mechanism for positioning and facing the cutter relative to the caliper. The facing mechanism includes a hollow rotary spindle, a facing head fixed to the rotary spindle, a slider movable only in a diametric direction of the facing head, and slidingly moved in eccentric relation with a rotary center of the rotary spindle and a facing shaft passing through the rotary spindle. The facing shaft is allowed to rotate with the rotary spindle but to be displaceable in an axial direction relative to the rotary spindle. The rotary spindle is rotated by a main motor. The facing shaft is moved in the axial direction by the rotation of a facing motor.

Abstract: An improved tube cutting apparatus and method for cutting through the inside of a metallic tube is disclosed herein. The apparatus generally comprises a support assembly which is slidably insertable within a tube, a flail tube cutting head connected to a short flexible shaft, and a linking shaft rotatably mounted within the support assembly for connecting the short flexible shaft of the cutting head to a longer flexible drive shaft. The center portion of the housing includes a mandrel circumscribed by a selectively expandable resilient bladder for temporarily affixing the support assembly to the inner wall of the tube in order to position the circular blade of the cutting head adjacent to a desired point along the longitudinal axis of the tube. The proximal and distal portions of the linking shaft include coupling assemblies for facilitating blade changes.

Abstract: A caliper machining apparatus for machining a caliper for a disc brake is disclosed which comprises: a cutter for cutting the caliper, a facing mechanism for positioning and facing the cutter relative to the caliper, and a caliper holding jig. The jig supports the caliper at several surfaces for machining by the cutter. The facing mechanism includes a hollow rotary spindle, a facing head fixed to the rotary spindle, a slider movable only in a diametric direction of the facing head, and slidingly moved in eccentric relation with a rotary center of the rotary spindle and a facing shaft passing through the rotary spindle. The facing shaft is allowed to rotate with the rotary spindle but to be displaceable in an axial direction relative to the rotary spindle. The rotary spindle is rotated by a main motor. The facing shaft is moved in the axial direction by the rotation of a facing motor.

Abstract: A caliper machining apparatus for machining a caliper for a disc brake is disclosed which comprises: a cutter for cutting the caliper, a facing mechanism for positioning and facing the cutter relative to the caliper. The facing mechanism includes a hollow rotary spindle, a facing head fixed to the rotary spindle, a slider movable only in a diametric direction of the facing head, and slidingly moved in eccentric relation with a rotary center of the rotary spindle and a facing shaft passing through the rotary spindle. The facing shaft is allowed to rotate with the rotary spindle but to be displaceable in an axial direction relative to the rotary spindle. The rotary spindle is rotated by a main motor. The facing shaft is moved in the axial direction by the rotation of a facing motor.

Abstract: The apparatus has a drive hub with a fixing pin and driving flange. A cross slide carrying a tool is displaceably guided in the flange. Displacement takes place by a guidance roller, which fits into a guidance groove of a planetary web of a planetary gear constructed as a cam plate. Together with a further similar planetary gear, the first planetary gear forms a planetary power split transmission, on which is superimposed the rotary movement of an annular motor. As a result of the rotary movement of the cam plate with the guidance groove the displacement of the cross slide is brought about. Using an envelope drive, the rotary movement of the motor is transferred to a tachoalternator with a pulse generator. The pulses of the pulse generator are processed in a processor, which controls the motor and therefore the displacement movement of the cross slide.

Abstract: A boring machine which is portable for field use and which is self-chucking and self-centering and has the capability of performing precision machining operations under computer control. The machining operations include pipe boring and internal threading. The boring machine has a chuck with relatively movable components including radially extendable blades for engagement with the interior of a pipe wall. A tool head is mounted for axial movement on a tubular drive shaft which is rotatably supported in cantilever fashion by the chuck. The actuation of the chuck and rotation of the drive shaft are derived from hydraulic means on the chuck within the interior of the pipe and connected to external fluid circuitry through stationary manifolds and fluid passages formed in the wall of the tubular drive shaft. The tool head is moved axially of the drive shaft by a lead screw rotatably driven by a servomotor and a tool slide is radially movable on the tool head by a second servomotor.

Abstract: A hollow housing (20) slidingly retains an extendable body (22) through an open end allowing forward and aft movement. A rotatable tool holding head (34) is adjustably connected to the body (22) and is free to rotate up to 180 degrees. Extendable adjustment in the form of a threaded shaft (44) and handwheel (46) provide the manual expansion movement by rotation of the wheel (46) located on the opposite end as the body (22). Radial movement is afforded by a similar handwheel (50) attached to the head (34) through a drive shaft (48). A slidable end (36) is attached to the head (34) and contains a removable cutting tool (38) that rotatably cuts away material from a rotated workpiece. In a variation of the body (20) an angular shape is added with or without a mounting slot. Also, a pair of servo motors (62) and (64) may replace the handwheels for electromechanical adjustment of the device incorporating another embodiment.

Abstract: An apparatus for facing and internal turning, comprising a rotating housing and at least one carriage bearing a cutting tool and being displaceable transversely to the axis of rotation, has a drive motor in the rotating housing for displacement of the carriage and a distance measurement mechanism for directly measuring the distance of displacement of the carriage in relation to the housing, measurement and supply lines hereby extending between rotating housing and a stationary evaluation and control unit and the measurement signals and energy supply being transferred at a transfer unit from those parts of the measurement and supply lines communicating with the rotating housing to those parts of those lines communicating with the stationary evaluation and control unit.

Abstract: A tool for cutting an annular groove on the interior of a substantially cylindrical surface comprising a primary body having a pointed base for anchoring the cutting tool and a portion for being grasped and rotated by a power source, at least one groove cutting assembly attached to and extending horizontally from the primary body towards the internal cylindrical surface, and means coupled to said primary body and moveably spaced from the cutting assembly for selectively urging a portion of the cutting assembly outwardly a predetermined distance thereby enabling a groove of predetermined depth to be made on the interior of the interior cylindrical surface when the primary body is rotated.

Abstract: A unique lens (10) having a peripheral carrier surface (13), a central optical zone (18) providing the toricity required to achieve a given spherical and cyclinder correction that is oriented to a selected axis angle (.psi.) and an intermediate, annular, transitional surface (15) between the optical and carrier surfaces (16 and 13). The method and apparatus for providing such a toric lens (10) employs a generator (50) that produces a sinusoidal signal in response to rotaton of the lathe spindle (26), and a signal that is selectively phased at a predetermined angularity with respect to the circumference of the rotatable spindle (26). The aforesaid signal is applied to a tool post oscillator (90) in order to oscillate the tool (36) in synchronization with rotation of the spindle (26) thereby cutting both curves of the toric surface (16) in one pass.

Abstract: A lathe for cutting an aspherical surface on a workpiece, such as a contact lens blank, comprises a headstock mounted for linear reciprocating movement relative to a radius cartridge having a tool post for mounting a cutting tool so that the tool can swing at a preset radius about an axis perpendicular to the rotational axis of the headstock spindle in the same plane as the spindle axis. The radius cartridge is coupled to the headstock via an eccentric mechanism, a connecting rod and a slidable bearing assembly for the headstock leadscrew so that the headstock is reciprocated in synchronism with oscillating movement of the radius cartridge to cause the tool to cut a predetermined aspherical surface on the workpiece. The headstock may be intermittently advanced towards the cutting tool, independently of its reciprocating movement and while the cutting tool is stationary, by means of the leadscrew in order to provide for incremental removal of material from the workpiece.

Abstract: Apparatus for machining a stop valve seat ring while the valve remains piped to a turbine comprises a pair of spiders with adjustable arms which fit within the valve and a shaft rotatably supported by the spiders and driven through a gear train by a motor attached to one of the spiders, the shaft having a tool support which holds and is capable of moving a single edge cutting tool axially to machine the seat ring.

Abstract: An apparatus for connection to a machine tool having a rotating head and a fixed part is capable of automatically moving a cutting tool radially while a spindle carrying the cutting tool rotates. The apparatus includes a body which is engageable to the tool machine so as to remain fixed with respect to a central axis. A spindle is rotatably mounted to the body and is connected to the head of the tool machine for rotation. A slide holder is fixed to the spindle and carries a toolholder for sliding movement in a radial direction with respect to the central axis. An electric motor is mounted in the non-rotating body and drives a gear train which can radially move the toolholder while the spindle, slide holder and toolholder rotate. A position transducer is engaged with the electric motor for determining its position and thus the position of the toolholder on the spindle.

Abstract: The invention has as an object to provide a reliable, failure-free tool holding apparatus which allows digitization of a tool holding apparatus having a tool moving function, is free from various problems encountered upon digitization, and does not cause an erroneous operation upon scattering and attachment of chips or cutting oil. In order to achieve this object, a scale member and a moving amount detecting means are arranged to oppose each other. The scale member is arranged at the side of a slide movable in a predetermined direction, and is moved following the movement of the slide. The moving amount detecting means is arranged at the side of the main body and supplies a predetermined number of oscillation pulses to a display in accordance with the moving amount of the scale member. The scale member is enclosed with stretchable members such as bellows members, and is moved in the enclosed, sealed space.

Abstract: A drilling attachment for use with a machine tool that rotates a workpiece in which the drilling apparatus is moved into an operative position to the workpiece by means of the machine tool slide and is rotated with the workpiece so that a drilling member associated with the rotating drilling apparatus is caused to rotate and to enter the workpiece while the same is rotating. The drive means for rotating the drill collet includes an idler gear which allows a greater work area between the rotating portion of said drill attachment and the drill collet on the drill attachment.

Abstract: A cross-feed facing head is described which includes a housing adapted to be mounted on a spindle for rotation therewith. Slides are mounted in transverse slideways on an end face of the housing, the slides including means for mounting cutting tools and being adapted for movement transversely to the axis of the rotation of the housing. An actuating member is axially, slideably mounted within the housing and has external helical teeth thereon. An annular gear member is mounted within the housing for rotation about the axis thereof and this annular gear member has gear teeth on the outer cylindrical edge thereof and further gear teeth on the inner cylindrical edge thereof, these inner teeth being preferably in the form of a series of spaced and adjustable racks mounted in pockets in the inner cylindrical edge with the teeth thereof mating with the external helical teeth of the actuating member.