Abstract: The present invention relates to a tool arrangement (5) which includes a parting tool (6) or the like which is intended to cut off or remove a machined section from the raw material (3) held firmly in a holding device (2). Located adjacent the parting tool (5, 6) on the side thereof that is proximal to the raw material (3) is a bifurcate device (7) which is intended to coact with the edge region (3b, 6b) of the raw material that lies proximal to the machined section, at least when parting of the machine section (3a) is completed, so that upon axial movement of the parting tool and/or bifurcate device a given length of raw material will be withdrawn from the holding device (2). The invention also relates to a method of moving the raw material out of the holding device.

Abstract: A laser cutting machine has a tube stock support bearing assembly on the cutting head itself. The support bearing assembly includes an indexing plate rotatable on the stock rotating axis, and an array of circularly-spaced, spring-loaded centering rollers permitting longitudinal movement of the tube through the bearing assembly. A pneumatically-operated stock gripper on the cutting head immediately adjacent the support bearing assembly enables the head to pull stock to any desired position on the horizontal axis. Another bearing assembly like the first, is at the left-hand end of the machine, both assemblies being adapted to various cross-sectional shapes of stock. A pneumatically operated stock gripper and feed apparatus, and a pneumatic-chucking, electric-rotating chuck assembly are associated with the steady rest bearing assembly at the left-hand end of the machine. The feeder moves stock through the chuck to be gripped by the head-mounted gripper.

Abstract: The invention relates to a feed device for machine tools with chuck arranged at the free end of a spindle, to which chuck the workpiece is fed axially through the inside of the spindle from the rear by means of compressed air from a compressed air nozzle through the spindle (1) into the chuck (2), having a tool station arranged in front of the head of the chuck and having a stop which comes in front of the head of the chuck (2) in synchronism with the machining for halting the movement of the individual workpiece (8). In order to increase the productivity, a brake member is arranged in the axial hollow (11) of the spindle (1) between the entrance end and the chuck (2).

Abstract: An apparatus for detecting stock includes a stock forming machine (10), a stock feeder which feeds stock into the stock forming machine, and a stock detector (32). The stock detector includes a housing (34), which includes a bore (42). The housing further includes a face (50) adjacent said bore. The stock detector further includes a piston (54), which is slidably mounted in the bore, and which is moved in the bore by the stock. The bore further includes a fluid filled chamber (74), which is located between the piston and the face. The pressure of the fluid within the chamber is increased when the piston is moved by the stock towards the face, and this increase in pressure in the chamber causes the piston to decelerate. The stock detector further includes a sensor (88) which is positioned in the housing adjacent the bore, for detecting the movement of the piston.

Abstract: Automatic apparatus for the feeding of bar-shaped stock to a machine tool, comprising an elongated receiving box which extends in feed direction, has a guide passage open at both ends for receiving a new stock bar and is formed by two receiving channels, an actuating device for the opening and closing of the receiving box as well as a pushing-in device for pushing a new stock bar in feed direction into the machine tool, wherein for simplifying the construction a clamping device is associated with the receiving box for securing a new stock bar in place in the receiving box and the latter is guided for displacement in feed direction and is displaceable back and forth in feed direction by the pushing-in device.

Abstract: A machine tool is provided having a spindle mounted for movement in a direction parallel to the spindle axis, the Z direction, and a direction perpendicular to the spindle axis, the X direction. The machine tool includes a machine bed and has means mounted to the machine bed for supporting at least one tool. At least one spindle is rotatably supported on the machine bed and includes a chuck for supporting a workpiece. The machine tool includes means mounting the spindle to the machine bed for movement in the Z direction and for independent movement in the X direction. Accordingly, the workpiece supporting means may be moved proximate to the tool supporting means and the workpiece may be engaged by a tool. The machine tool may further include feeder means for feeding bar stock to the workpiece supporting means so that the bar stock may be engaged by a tool. The machine tool may also include workpiece transfer means for facilitating the transfer of workpieces to and from the workpiece supporting means.

Abstract: A machine tool is provided having a spindle mounted for movement in a direction parallel to the spindle axis, the Z direction, and a direction perpendicular to the spindle axis, the X direction. The machine tool includes a machine bed and has means mounted to the machine bed for supporting at least one tool. At least one spindle is rotatably supported on the machine bed and includes a chuck for supporting a workpiece. The machine tool includes means mounting the spindle to the machine bed for movement in the Z direction and for independent movement in the X direction. Accordingly, the workpiece supporting means may be moved proximate to the tool supporting means and the workpiece may be engaged by a tool. The machine tool may further include feeder means for feeding bar stock to the workpiece supporting means so that the bar stock may be engaged by a tool. The machine tool may also include workpiece transfer means for facilitating the transfer of workpieces to and from the workpiece supporting means.

Abstract: Depleted stock feeder tubes, and feed malfunctions, are detected in bar fed machines such as automatic screw machines, CNC lathes and the like, employing reciprocating feed tubes with flexible feed fingers that grip the stock, with a sensor assembly mounted on a pivoted stock feeding lever or other feeder mechanism. The body of the sensor assembly is positioned to press against a roller or other connecting member extending laterally from the feed tube assembly, and retract the feed tube. A plunger or other reciprocating contact member is mounted in and biased to extend from the body. If a feed tube is stocked when the feed tube is retracted, the force required to retract the feed tube is greater than the biasing force on the plunger, the plunger moves, and a proximity sensor or other detector senses the new position or motion of the plunger.

Abstract: A bar feed assembly for receiving and guiding a bar stock to be machined in a lathe, comprises a tubular member for rotatably receiving and guiding the bar stock to be machined and a member for advancing the bar stock through the tubular members. A plurality of stabilizing bodies are provided along said tubular member in spaced apart relation and each has a compliant surface disposed in surrounding relation to the tubular member in a manner which permits axial thermal growth of the tubular members through the stabilizing bodies.

Abstract: A process and device for machining bars, tubes or tube blanks, especially strand-cast copper blanks, in which the work piece to be machined--supported in the cross-plane of the metal-cutting device is cut on its periphery and along its length, while the die and the work piece are continually moved relative to one another in the longitudinal direction of the work piece. At least one die rotates concentrically around the work piece, which is held in a rotation-proof manner, on a plane inclined toward the longitudinal axis of the work piece and with its cutters simultaneously machines two areas of the work piece surface that are located opposite to one another.

Abstract: A pull bar gripper assembly having a body member with a pusher slidably mounted thereon arranged to engage the end of a workpiece to be pulled. A collar is connected to the pusher. A pair of gripper arms, each having a gripping pad connected on one end thereof, are pivotally mounted on the body member. A toggle link interconnects the other end of each gripper arm to the collar and a coil spring normally biases the pusher toward an inoperative or non-gripping position. In operation, the gripper arms are pivoted into gripping position onto a workpiece as the gripper assembly is advanced toward the workpiece by the retraction of the pusher upon engaging the end of a workpiece. In doing so, the toggle link compressing the coil spring shifts through dead center to lock the gripping pads onto the workpiece. Release is effected by pulling the gripper assembly away from the workpiece slightly, causing the coil spring to return the pusher and gripper arms to their normal inoperative or non-gripping position.

Abstract: A loading device comprises a pusher for feeding a bar along a guide towards a lathe spindle. The pusher comprises a first thrust part (16, 116) which is constrained to traversing means (14) along, said path. Said first part comprises a constraint element (18, 118) for coupling with a complementary constraint element (19, 119) located on a second and removable pusher part (17, 117) which constitutes the axial extension of the first part along the guides. The two elements (18, 118, 19, 119) extend axially between the first and second parts and have their transverse dimension within the transverse dimension of the guide to run therein.

Abstract: A bar stock supporting and feeding apparatus which includes first and second series of bar stock support members centered about a longitudinal axis and movable with respect to the axis to rotatably engage a length of bar stock. An adjustable stop mechanism is provided to quickly adjust the apparatus to rotatably support bar stock of different diameter. A loading and unloading mechanism is provided which does not require that an operator's hands be placed dangerously close to the apparatus. A bar stock feeding apparatus is provided with a similar gear system for engaging the bar stock and feeding it into an adjacent machine tool. A fail-safe mechanism prevents disengagement of the support apparatus in the event of a loss of fluid pressure in the system.

Abstract: In an NC loader (1) for a machine tool-having a main spindle (7) mounted on a main spindle base (5), the NC loader comprises: a support frame (41) mounted on the main spindle base; a loader body (45) mounted on the support frame and having a horizontal shaft (43) movable in a horizontal direction, and a vertical shaft (47) movable in a vertical direction; a load/unload hand (53) provided with both work and product hand sections (49, 51) integrally attached to an end of the vertical shaft; at least one work shooter (55) attached to the support frame, for loading work onto the work hand section of the load/unload hand; and at least one product shooter (57) attached to the same support frame, for unloading products from the product hand section of the load/unload hand.

Abstract: A device (10,110) for loading bars in an automatic lathe comprises guide means (19,119,119') along which is supported and made to run a bar (12,112) with leading end projecting from said guide means to be inserted in a lathe chuck (11,111) to be grasped by handling means (21,121) of the lathe moving parallel to the bar axis to feed the bar under machining tools (31,131). At least a first part of the guide means (19,119,119') nearest the chuck has kinematic connection with the handling means (21,121) for moving axially and substantially synchronously therewith.

Abstract: A device (10) for loading bars in an automatic lathe comprises a pusher (13) with handling means (15,18) to push axially the leading end of a bar (12) into a lathe chuck (11) to be grasped by lathe means (21) moving parallel to the bar axis to feed the bar under machining tools (31). The pusher (13) with its own handling means (15,18) is supported on a truck (24) moving along guides parallel to the direction of movement of the bar (12). The truck (24) comprises connection means (30) to be constrained to the lathe bar-feed means for moving synchronously therewith.

Abstract: A push-type collet and seat assembly has a push-type collet including an elongated cylindrical body having a rear end portion, a front end portion tapering inwardly towards a front end thereof, an opening extending longitudinally through the collet, and slots extending longitudinally through at least the front end portion in communication with the opening to divide the front end portion into separated compressible portions. A workpiece is inserted into the opening of the collet and extends forwardly of the compressible portions. A seat partially receives the collet therein so that, when the collet front end portion is forcibly wedged against the seat, the compressible portions are squeezed against the workpiece to fix the workpiece relative to the collet. A stop is disposed a predetermined distance forwardly of the seat and adapted to receive the workpiece front end so that, when the workpiece front end is forcibly wedged against the stop, the stop limits forward movement of the workpiece.

Abstract: An apparatus for prealigning hex or square stock sections before chucking in a collet. As hex stock advances, pre-alignment bushing provides general alignment. A plurality of spring-loaded veliers positioned within the prealignment collar slidably contact the flats of the stock along the path of travel and urges the stock radially to the proper alignment, so that the points of the stock do not hit the collet.

Abstract: An automatic lathe having two workpiece spindles each provided with a workpiece clamping device and arranged with coaxial spindle axes. At least one of the workpiece spindles is arranged on a slide guided for displacement in the direction of the spindle axis and displaceable in the direction of the spindle axis by a drive element and a coupling device between the drive element and the slide. In order to compensate for axial movement component of the clamping device during clamping, the coupling device is designed such that in a first condition thereof, the slide is freely displaceable relative to the drive element in the direction of the spindle axis and opposite to the axial movement component of the clamping device. In a second condition of the coupling device, the slide is not displaceable relative to the drive element in the direction of the spindle axis.

Abstract: On a frame, a headstock and a tool rest are provided being free to relatively move so as to perform machining operations. The headstock is rotatably provided with spindle. The spindle is provided with a workpiece gripping means. One or more than one bar supporting means for movably supporting a bar stock in a predetermined feeding direction are provided at a predetermined position with respect to the spindle. A cutting means, for cutting the bar stock supported by the bar stock supporting means at a cutting position on the feeding direction side to the bar supporting means, is provided. A workpiece carrying means is provided being free to move relative to the headstock so as to deliver the workpiece produced by cutting of the bar stock with the cutting means to the workpiece gripping means of the spindle from the workpiece gripping means side to the spindle.

Abstract: A loading device for sequential loading of bars in machine tools comprises chutes (16) for arrival of a bar against stops (17) for stopping in a withdrawal position. Beyond the stops (17) there is a guide (20,20') for axial sliding of a bar in a direction aligned with the inlet of a machine tool (14). Raising elements (22) have their upper surface (23) inclined and terminating with a stop part (24) arranged substantially vertically to the guide (20,20'). Said raising elements (22) are mobile between a first position below the chutes (16) and the guides (20,20') and a second position above the stops (17) and the guides (20,20') in which they raise the bar placed in the withdrawal position to cause sliding onto the upper inclined surface (23) toward the guide ( 20,20') to a stop position (26). Upon return of the raising elements to the first position the bar in the stop position (26) is placed on the underlying guides (20,20') to be pushed by (pushers) (37,38) into the machine tool.

Abstract: A guide apparatus for guiding an elongated rotary member comprises first and second plate members, each including a through-hole to define a longitudinal axis and a passage through-which the elongated member may pass. The second plate member is rotatable relative to the first plate member about the longitudinal axis. A bearing mechanism supports the second plate member for rotation and for preventing relative radial movement between the first and second plate members. A movable guiding mechanism comprises at least three guide fingers carrying a guide roller at their inner ends. The guide fingers are actuated by an air or hydraulic cylinder to swung radially inwardly such that the guide rollers contact the elongated rotary member. A pick-up finger is connected to one of the guide fingers to raise the elongated rotary member to the center of the passage. The bearing mechanism may comprise rotary elements which minimize friction between the first and second plate members.

Abstract: The guiding apparatus (10) is disposed between the feed tube (13) of the turning machine and the guide tube (11) for the rod-shaped workpieces which is aligned therewith. The guiding apparatus (10) has an intermediate tube (12) which reaches from the rear end of the feed tube (13) at least to the guide tube (11). Between the feed tube (12) and the intermediate tube (12) a coupling device (14) is present by means of which the intermediate tube (12) is mounted on the feed tube rotatably and axially undisplaceably. The coupling device (14) is sealed from the outside. Between the guide tube (11) and the intermediate tube (12) a seal (42) with axial displacement possibility is present.

Abstract: A machine tool having a stock holding and supporting grip which is spaced from the stock clamping chuck and which provides an equally applied gripping pressure at circumferentially spaced locations about the stock, preferably applied by hydraulic gripping elements. The grip accommodates eccentricities and deviations in the stock, and prevents increase in such eccentricities during rotation of the stock during machining which would otherwise arise due to centrified forces acting on the protruding tail of the stock, thus preventing bowing and whipping of the unworked tail and of the stock while machining.

Abstract: The machine comprises a base (3), a first mandrel (4), a second mandrel (5) nd a third mandrel (6) for the holding and positioning of the profile or bar (2), and structure (7, 8) to mount at least the second mandrel (5) and the third mandrel (6) in cooperation with the base (3), so that they can be displaced in translation relative to the base along a same machining axis (9).

Abstract: Apparatus for an automatic bar feeder is given which provides fluid to the space between the barstock and guide tube having a pump integral to the piston pusher to control pressure on the barstock being fed to the machine tool.

Abstract: A pressure stabilizing apparatus is given which is capable of storing and supplying the volume of hydraulic fluid needed for rapid advances as well as accepting displaced hydraulic fluid required for rapid retractions in a barfeed apparatus. This pressure stabilizing apparatus or surge-accumulator device demonstrates the advantage of eliminating excessive force, which could damage the headstock, cause increased vibration and noise, and also prevents loss of contact with the bar end, all of which limit the speed of the spindle, and reduce productivity.

Abstract: A material holding and guiding device of automatic lathe has a base with one end provided with an arm frame and another end provided with a reciprocating set. A receiving and retaining set is mounted pivotally on the arm frame in a manner that the bottom of the receiving and retaining set is coupled with the reciprocating set. The receiving and retaining set has an inner annular body and an outer annular body. The inner annular body is axially provided with a through hole which is used to accommodate therein the material to be lathed and which is provided at each of two ends thereof with a ring sleeve. The motion of the reciprocating set causes the receiving and retaining set to make a swing of a predetermined angle so as to force the ring sleeves located at both ends of the through hole of the inner annular body to hold the material stably in a manner that the material is capable of turning synchronously with the inner annular body.

Abstract: A bar feeder for a machine tool, comprising a first guide and first pushing member for feeding bars in alignment with a spindle of the machine. A second bar guide and a second pushing member are laterally arranged to the first pushing member. A drive slidably moves the pushing members in a feeding direction of the bars. The first pushing member and second pushing member conjointly with the second bar guide are reciprocally alignable with the first guide. A programmable control unit (PLC) sequentially actuates the pushing members in an aligned condition with the first guide to forward a bar and insert it in a spindle maintaining an inoperative condition of the machine, and to forward by steps the bar along the spindle at each working cycle of the machine.

Abstract: A guide bush is described, having a bush-holder and a quill integral with the bush support. The device has a clamp capable of rotating a workpiece, means for opening and closing the clamp and regulating means adapted to monitor the opening and closing means in order to compensate for changes in the dimensional tolerances of the workpiece, wherein the bush regulating means are adapted to operate the opening and closing means of the clamping means very quickly as a direct result of variations in the dimensional tolerances of the workpiece in order to provide a substantially constant pressure of the clamp on the workpiece. The bush is for use with a machine tool such as a travelling headstock automatic lathe.

Abstract: The invention relates to a guide-bar tube for an automatic lather. The guide-bar tube includes a centering traveler comprising balls distributed in two parallel planes in a manner which allows the centering traveler to be locked either to the guide-bar tube or to the rod of a feed piston. This arrangement allows the displacement of the feed piston both for advancing the bar stock towards the lather and for retraction of the piston towards the rear of the device by vacuum. The presence of the traveller, which is normally mounted on the rod of the feed piston, eliminates buckling and floating of the bar stock and of the feeder rod in the guide-bar tube. This structure results in a considerable increase in the number of turns of the bar and a great reduction of noise.

Abstract: A device for preventing deflection of an elongated workpiece rotating about its longitudinal axis is provided with a contact ring (9) that is rotatably mounted about a support shaft (12) perpendicular to the axis of rotation of the contact ring (9). The angle of inclination of the rotational axis of the contact ring (9) is variable relative to the rotational axis of the elongated workpiece (M) inserted throught the ring (9), by rotating the housing (6) about the support shaft (12). The periphery of the workpiece (M) is supported by the inner periphery of the contact ring (9) at two points, i.e., at axial ends of the contact ring. Thus, elongated workpieces of different diameters can be supported by varying the inclination angle of the axis of the contact ring (9) relative to the workpiece (M).

Abstract: A guide apparatus for guiding an elongated rotary member comprises first and second plate members, each including a through-hole to define a longitudinal axis and a passage through-which the elongated member may pass. The second plate member is rotatable relative to the first plate member about the longitudinal axis. A bearing mechanism supports the second plate member for rotation and for preventing relative radial movement between the first and second plate members. A movable guiding mechanism comprises at least three guide fingers carrying a guide roller at their inner ends. The guide fingers are actuated by an air or hydraulic cylinder to swung radially inwardly such that the guide rollers contact the elongated rotary member. A pick-up finger is connected to one of the guide fingers to raise the elongated rotary member to the center of the passage. The bearing mechanism may comprise rotary elements which minimize friction between the first and second plate members.

Abstract: A bar feeding and handling machine. A frame bar is mounted in parallelism with the axis of a machine chuck. The chuck is adapted to support a workpiece. Link members are pivotally attached to the frame bar adjacent to opposite ends thereof. A pneumatic cylinder is pivotally attached to the link members to move between an advanced position aligned with the machine chuck and a retracted position. A pusher head mounted on a cylinder rod of the cylinder can engage the workpiece when in advanced position. The cylinder rod and the head are advanced to advance the workpiece. Another workpiece can be loaded into the chuck when the cylinder is in retracted position.

Abstract: A multispindle lathe is disclosed which has an indexable drum including a plurality of main spindles. A secondary spindle opposes the main spindles so that it is coaxial with one of the main spindles at an indexed position. The secondary spindle is rotatable on a fixed axis and can be moved axially towards the main spindle. The rotation of the secondary spindle can be synchronized with the rotation of the main spindle so that both spindles can hold a workpiece. A cut off tool moves transversely to the spindles to cut the workpiece from bar stock which has been fed into the main spindle. After cut off, the secondary spindle moves away from the main spindle and a secondary tool moves transversely to the secondary spindle to machine the end of the workpiece which has just been cut off. Movement of the secondary tool and secondary spindle can be coordinated to form curves and tapered threads.

Abstract: A holder for bar stock being fed to a turning machine includes bar stock holding V-shaped trough, and a top guide assembly mounted to a floor-mounted frame through frame-mounted slides that are vertically slidable on the frame in opposite directions. A horizontally-extending adjusting-cam rail is horizontally slidably mounted to the frame. It has inclined keys thereon received in keyways in horizontal cylinders mounted in the vertically movable slides so that, upon linear adjustment of the cam rail, the trough mounting slides and the guide mounting slides are vertically moved simultaneously but in opposite directions to adapt the apparatus to different sizes of stock, but without changing the location of the centerline of the stock to be fed to the turning machine. A handwheel operated screw adjusts the cam rail. A parallelogram linkage and operating handle provide for quick guiding control of new stock after loading into the trough from above the trough.

Abstract: A bar feed apparatus for supplying elongated bar stock to the headstock of an automatic lathe. An elongated guide tube receives the stock and includes a hydraulic piston that controllably advances the stock toward the lathe. For cushioning the rotating bar stock against vibration within the tube, controlled quantities of hydraulic fluid is forced longitudinally into an annular clearance about the piston to and about the bar stock. A flexible seal secured downstream of the piston effects collapse during the forward stoke of the piston and effects a vacuum seal during a vacuum induced return stoke of the piston.

Abstract: A guide (10) for automatic bar feeders for lathes, comprises a plurality of elements (11) with a C-shaped guiding portion (16), disposed aligned and facing each other to form a channel through which the bar (15) slides. Each C-shaped portion (16) is supported by an arm (17) connected to it in an assymetrical position to define portions (19 and 20) of different lengths so as to uniform the flexibility of the elements (11) due to the arm variations with respect to their point of connection (12) to the rest of the feeding device (13, 14).

Abstract: A bar puller for a numerically controlled turret lathe having a mounting member for mounting the bar puller to one of the stations of a rotary turret on the lathe, the bar puller having a pair of gripping jaws that are pivotally mounted between clevis plates on pivot pins and biased by a plurality of compression springs, the jaw blocks carrying adjustable gripping members that engage the end of a bar stock and draw the bar stock in the chuck on displacement of the turret carriage with the gripping jaws being released by further displacement of the turret carriage after a chuck has been secured on the stock.

Abstract: The device comprises essentially a body or shaped piece of cylindrical form and of a circular or polygonal cross section, comprising tubular cavities of different diameters for receiving the bars to be machined of different diameters. The tubular cavities can comprise longitudinal distribution channels for feeding oil under pressure to the bar to be machined. The cylindrical body further comprises indexing grooves at its external periphery, means of distribution of oil at the rear part of the device, an oil collector located at the front part of the device and cavities permitting the return of the oil to a hydraulic group. Reinforcing ribs are provided between the tubular cavities and between the latter and a mantle of the cylindrical body so that the latter has a great moment of inertia which ensures a good stability of the device. The tubular cavities may comprise tubes aligned along the longitudinal axis of the cavities and rotating freely with play in these tubular cavities.

Abstract: The bar-pusher actuation device for bar feeders applied to machine tools includes a linear actuator composed of a chain with which the bar-pusher is associated and which is closed around a pair of fixed pinions and a pair of gearwheels which are movable with respect to the pinions. The pair of gearwheels is mounted on a slider which is slidable parallel to the direction of advancement of the bar. The slider is actuated by a jack adapted to perform a reciprocating stroke which substantially corresponds to the length of the portion of bar to be machined.

Abstract: In order to so improve a bar stock feeding means for machine tools comprising a longitudinal guide means on which several holders which each receive the bar stock in a guide means are held for movement in the longitudinal direction of the longitudinal guide means, and a drive means with which the holders are displaceable from an initial position in which they exhibit a maximum spacing from one another in the longitudinal direction into an end position on the machine tool side in which they exhibit a minimum spacing from one another in the longitudinal direction, that it can be sturdily and structurally simply made, it is proposed that the longitudinal guide means comprise a guide element having a longitudinal thread, that the holders be held in parallel alignment with one another by threaded rings engaging the longitudinal thread, and that the holders be movable in the longitudinal direction between the initial position and the end position by a relatively rotation between the guide element and the threaded r

Abstract: A multi spindle automatic lathe comprising a single motor (20) for rotating a plurality of spindles (55) which are freely rotatably supported on a spindle carrier (52) which is in turn supported on a headstock (51) for an indexing rotation so as to prevent a mutual spatial interference occuring between said motor (20) and an elongated member (W) during the processing of such elongated member (W), wherein said spindle carrier (52) has its rotary shaft arranged so as to be a common axis with the output shaft (21) of said motor (20), and wherein the lathe further comprises a means (56), (57) for transmitting the rotary output power of said motor (20) to each of said plurality of spindles, and through-holes (37) defined in the stator portion (29) of said motor (20) so as to be on a common axis with central holes of said plurality of spindles (55).

Abstract: A machine tool has first and second spindles provided so as to face each other. The first and the second spindles are synchronously rotated without stopping their rotation. A machined workpiece, after a first machining routine, in a state of rotation is directly delivered from the first spindle to the second spindle, and a second routine of machining is immediately performed.

Abstract: The device for inserting polygonal and shaped bars in the collet of the chuck of machine tools comprises a bar pusher element arranged inside a bar guiding channel and a motor element connected to a worm screw which cause sliding of a slider rigidly associated with the bar pusher. The device has a spring mounted in abutment against the worm screw and adapted to be compressed when the bar rests frontally on the collet of the rotating chuck, so as to absorb the thrust of the motor and to press the bar against the collet, and a motor switch activated by the compression of the spring until the rotation of the chuck causes the chuck to be brought angularly in step with the bar and the bar to be inserted in the collet.

Abstract: The device comprises essentially a body or shaped piece of cylindrical form and of a circular or polygonal cross section, comprising tubular cavities of different diameters for receiving the bars to be machined of different diameters. The tubular cavities can comprise longitudinal distribution channels for feeding oil under pressure to the bar to be machined. The cylindrical body further comprises indexing grooves at its external periphery, means of distribution of oil at the rear part of the device, an oil collector located at the front part of the device and cavities permitting the return of the oil to a hydraulic group. Reinforcing ribs are provided between the tubular cavities and between the latter and a mantle of the cylindrical body so that the latter has a great moment of inertia which ensures a good stability of the device. The tubular cavities may comprise tubes aligned along the longitudinal axis of the cavities and rotating freely with play in these tubular cavities.

Abstract: The convertible bar-puller provides a convertible tool for automatic lathes. This tool has two main parts; a housing head and a shank. The housing head is attached to the shank using an adjustable connection means allowing the housing head to be positioned vertically with respect to the shank. The shank includes flat sides and radius corners to be received in either an internal tool housing or an external tool housing on the turret of the lathe. Positioning of the head on the shank in a first position fixed with the shank even with the upper end of the housing head adapts the tool for an external tool housing while fixing the head in the middle of the shank adapts the tool for an internal tool housing. Jaws for engaging the object to be machined extend forwardly from the head and have an adjustable jaw opening. The jaws each comprise a finger portion and an end portion, the end portion received in a circular groove on a jaw setting screw internal to the head.

Abstract: In a remaining bar material machining method, a plurality of works are taken from a continuous bar material on an NC lathe, and the remaining portion left at the end of the bar material is machined effectively. In the lathe in which both first and second headstocks are axially movable along the bed, the continuous bar material can be continuously machined with efficiency. At that time, to utilize the remaining portion left at the end of the bar material effectively without discarding it, this remaining bar material is transferred to the second headstock. An NC controller includes a main machining program and a remaining bar material machining program; when the remaining bar material has been transferred to the second headstock, the remaining bar material machining program is executed instead of the main machining program having hitherto been executed. During machining the remaining bar material on the second headstock, the first headstock is waiting in readiness for the machining of the next bar material.

Abstract: A centerless turning machine for rods. The machine includes a cutter-head mounted at the front end of a rotating hollow shaft, and further includes a plurality of advancing rollers of an infeed device operatively mounted at the inlet end of the turning machine. The turning machine further includes a front guide mechanism and a rear guide mechanism, respectively mounted on opposite sides of the cutter head, and also includes a clamping carriage which is mounted on the outlet side of the turning machine. The rear guide mechanism takes the form of a tubular support which is provided with a flange mounted in the machine housing and which extends into the rotating hollow shaft. The rear guide mechanism has, at its free end, which protrudes into the hollow shaft, three individually spring biased guide elements for the rod. The springs for each individual guide element form a first resilient abutment for each guide element. The movements of the three guide elements are synchronized by a rotatable ring.

Abstract: A tool head (12) through which work bars (35) to be machined can be pushed and which is adapted to be driven in rotation is supported on a head stock (11). The head stock (11) is disposed between a rear feeding means (57) and a front chuck means (25). The rear feeding means (57) is designed for steadily advancing one work bar (35) at a time up to the chuck means (25) and is movable into a position ready to take up another work bar (35) before the preceding work bar (35) has been used up. The front chuck means (25) is designed to grip a portion of the work bar (35) pushed through the head stock (11) and the tool head (12) and to exert forwardly directed axial pull on the same, and it can be pushed axially back and forth by its own feed drive means (27) independently of the rear feeding means (57). That makes it possible to replace a used up work bar (35) by a new one in simple manner, in little time, and without any risk of an accident.