Abstract: The disclosed embodiments are directed to an improved automatic screw machine employing a first servomotor connected to cause rotation of a first set of tooling cams independently of the operation of a spindle drive, and a second servomotor to cause rotation of a second set of cams independently of the operation of the spindle drive, wherein a multi-axis controller controls at least the speed of the spindle drive in conjunction with at least each of the two servomotors, and where the operation of at least the two servomotors is electronically synchronized.

Abstract: To provide a machine tool in which a workpiece can be delivered to/from a first and a second spindle headstock without any increase in front/back direction dimension of a machine main body. A second spindle headstock 4 is capable of moving to a position for workpiece delivery to/from a first spindle headstock 3 so as to be close to or to abut on the first spindle headstock 3. When the second spindle headstock 4 is positioned at the workpiece delivery position, a tool post 5 is positioned right under the first spindle headstock 3 so that its cutting point “c” is positioned vertically under an axis “a” of the first and second spindle headstocks 3, 4.

Abstract: The invention relates to a machining unit in which the pieces are carried by an electric turning spindle radially arranged on a turret with a vertical axis of rotation. On rotation of the turret the pieces are successively introduced into machining stations, arranged peripherally around said turret and comprising tool support means. A large space is thus available around the periphery of the machine for housing the tools. The electric turning spindles are adapted to selectively hold the pieces at any fixed angle, thus permitting not only turning operations but also other machining operations on fixed pieces.

Abstract: A multi-spindle machine system includes a pick-off attachment. The pick-off attachment enables a more compact and stronger pick-off spindle. The shorter pick-off spindle is able to pick off longer work pieces. High speed bearings and oil lubrication enable the pick-off attachment to perform additional back machining functions. Other features include a dovetail spindle housing support associated with a slip-inducing composite material, an over-tension stop indicator, and an increased pick off position to cam position ratio.

Abstract: In order to provide a multiple spindle machine tool having a machine frame, a first spindle slide with a first workpiece spindle, and a second spindle slide with a second workpiece spindle, wherein first spindle slide and second spindle slide are guided on the machine frame for linear displacement, and a tool receiving device, which is of a simple construction with minimized space requirements with respect to the workpiece spindles, a first guide and a spaced second guide are arranged on the machine frame, both the first spindle slide and the second spindle slide being guided on these guides, and the first workpiece spindle and the second workpiece spindle being arranged between the two guides.

Abstract: An automatic lathe (10) is provided with a first spindle (14) having an axis of rotation (14a), a first tool rest (18) capable of holding a plurality of tools (22) in a parallel arrangement, a second tool rest (20) capable of holding a plurality of tools (22) in parallel arrangements in a first row and second row exhibiting mutually different nose orientations, and a second spindle (16) having an axis of rotation parallel to the axis of rotation of the first spindle and capable of being located facing the first spindle, in such a manner as to be centrally carried on a lathe bed (12). The first spindle can move linearly along a first control axis parallel to its axis of rotation. The first tool rest can move linearly along a second control axis perpendicular to the first control axis. The second tool rest can move linearly along a third control axis perpendicular to the first control axis and a fourth control axis parallel to the first control axis.

Abstract: A machine frame, at the top of which is disposed a vertically displaceable workpiece-accommodation spindle with a workpiece chucking device. Disposed on the machine frame are a tool holder, displaceable in a horizontal X1 direction, for a tool and another tool holder, displaceable in a horizontal X2 direction as well as in a vertical Z2 direction, for accommodation of a second tool. Displacing the workpiece accommodation spindle, inclusive of its rotary drive, and the displacement drive of the tool holders is implemented by way of a central control unit.

Abstract: An NC lathe 1 comprises a bed 5, a headstock 10 provided on the bed 5, a main spindle 11 supported on the headstock 10 so as to be rotatable around the axis thereof, a rotation drive device for rotating the main spindle 11, a stationary frame 15 formed in a rectangular frame shape and fixed to the upper face of the bed 5, a movable frame 16 formed in a rectangular frame shape and provided so as to be movable in the Z-axis direction with respect to the stationary frame 15, a saddle 17 provided so as to be movable in the X-axis direction with respect to the movable frame 16, a quill 18 accommodated inside the accommodation hole 17a in the saddle 17 and provided so as to be movable in the Y-axis direction, and a tool rest 20 supported on the quill 18.

Abstract: A lathe 1 comprises a bed 5, a headstock 10 having a housing 13 and a support base 14, a main spindle 11, a first tool rest 44, and a second tool rest 50. The support base 14 is formed so as to have a concave portion 14a on the upper portion thereof and so that the upper portion protrudes toward the second tool rest 50. The tool rest body 51 of the second tool rest 50 is configured so as to be movable into and out of a space formed downward from the upper portion of the support base 14. The housing 13 has a holding hole 13a for rotatably holding the main spindle 11, and installation portions 13b. The installation portions 13b are supported on the support base 14 in a state wherein a predetermined clearance is provided between the housing 13 and the concave portion 14a.

Abstract: A machine tool assembly having a base assembly movable relative to a support selectively a) oppositely parallel to a first line, and b) oppositely parallel to a second line that is orthogonal to the first line, and a first spindle headstock movable with the base assembly and having a central axis extending parallel to the first line and a working end. The machine tool assembly further includes a first turret assembly movable with the base assembly and having a first turret headstock and a first turret head that is movable around a first axis relative to the first turret headstock. The first turret head is movable selectively into first and second different angular positions around the first axis relative to the first turret headstock.

Abstract: The invention relates to a machining unit in which the pieces are carried by an electric turning spindle radially arranged on a turret with a vertical axis of rotation. On rotation of the turret the pieces are successively introduced into machining stations, arranged peripherally around said turret and comprising tool support means. A large space is thus available around the periphery of the machine for housing the tools. The electric turning spindles are adapted to selectively hold the pieces at any fixed angle, thus permitting not only turning operations but also other machining operations on fixed pieces.

Abstract: An NC lathe performs various processing at the same time to a plurality of works. The NC lathe includes a first spindle and a second spindle, and a tool rest having tools for processing works. The tool rest is freely movable in the direction of Z1-axis and X1-axis. The second spindle is freely movable in the direction of X2-axis and Z2-axis. An NC unit controls the movement in the direction of the X1-axis and the Z1-axis of the tool rest, and controls the movement in the direction of the X2-axis and the Z2-axis of the second headstock. The NC unit superposes the movement in the direction of the X2-axis on the movement of the X1-axis of the tool rest. Furthermore, the movement of the Z2-axis is superposed on the movement in the direction of the Z1-axis of the tool rest.

Abstract: In order to improve a multispindle lathe comprising a machine frame, a rotatably mounted spindle drum, at least two workpiece spindles arranged in the spindle drum with their workpiece receiving means rotatable about a respective spindle axis, a plurality of spindle stations provided stationarily on the machine frame, into which the workpiece spindles are adapted to be brought, such that removal of workpieces in the workpiece removal station, which can take place very quickly, is possible with simple means, it is proposed that a rotatable workpiece receiving means be allocated to the workpiece removal station, the workpiece receiving means being movable by means of a carrier device relative to the workpiece spindle located in a workpiece removal station between a workpiece take-over position, in which the axis of the workpiece receiving means extends coaxially with the spindle axis of the workpiece spindle located in the workpiece removal station, and a workpiece delivery position, and the workpiece receiving

Abstract: The invention relates to a machine tool, especially a lathe, comprising a machine frame upon which a first and second spindle housing carrier are arranged in such a way that they can move in a direction Z in relation to each other; a first working spindle; a second working spindle; a first tool carrier which is associated with the first working spindle; a second tool carrier which is associated with the second working spindle, said first and second tool carriers being arranged on the same side of the spindle axis; and a machine control unit.

Abstract: An automatic lathe (10) is provided with a first spindle (14) having an axis of rotation (14a), a first tool rest (18) capable of holding a plurality of tools (22) in a parallel arrangement, a second tool rest (20) capable of holding a plurality of tools (22) in parallel arrangements in a first row and second row exhibiting mutually different nose orientations, and a second spindle (16) having an axis of rotation parallel to the axis of rotation of the first spindle and capable of being located facing the first spindle, in such a manner as to be centrally carried on a lathe bed (12). The first spindle can move linearly along a first control axis parallel to its axis of rotation. The first tool rest can move linearly along a second control axis perpendicular to the first control axis. The second tool rest can move linearly along a third control axis perpendicular to the first control axis and a fourth control axis parallel to the first control axis.

Abstract: At least one component of a spindle assembly has matched bosses disposed to the opposite sides of a transversely extending, axially offset coupling recess or key, for balance of the forces acting therealong.

Abstract: A cutting tool is disposed on a turret. The cutting tool includes: a holder having a peak end, and a throw-away insert clamped to the peak end of the holder with a clamp screw. The holder has a bottom face and a peak end face defining a corner of the holder. The corner of the holder forms a chamfered face. The throw-away insert has a bottom face and a relief face defining a corner of the throw-away insert. The corner of the throw-away insert forms a chamfered face. The chamfered face of the corner of the holder and the chamfered face of the corner of the throw-away insert prevent the cutting tools adjacent to each other from causing an interference with each other when the cutting tools are at least one of in a standby position and in a machining operation.

Abstract: In order to improve a machine tool comprising a tool carrier with a tool carrier head which is mounted for rotation about an axis and has a support member with a plurality of tool receiving means, into which drivable tool units can be inserted such that gear wheels for driving all the tool units insertable into the tool receiving means are arranged and can be moved in an interior of the support member on an orbital path extending around the axis, in such a manner that some of the tool units can be driven selectively, it is suggested that a drive wheel be rotatable about a drive axis which is arranged non-coaxially in relation to the axis, that teeth of the drive wheel move on a flight path which extends such that in a drive section of the orbital path the distances between this and the flight path have the lowest values and are greater in all the other sections of the orbital path and that the teeth be in drive engagement with a gear wheel located in the drive section and extend without contact in relation to

Abstract: A machine tool assembly having a base assembly movable relative to a support selectively a) oppositely parallel to a first line, and b) oppositely parallel to a second line that is orthogonal to the first line, and a first spindle headstock movable with the base assembly and having a central axis extending parallel to the first line and a working end. The machine tool assembly further includes a first turret assembly movable with the base assembly and having a first turret headstock and a first turret head that is movable around a first axis relative to the first turret headstock. The first turret head is movable selectively into first and second different angular positions around the first axis relative to the first turret headstock.

Abstract: A multiple spindle bar machine (10) includes in its preferred embodiment three main spindles (66) that are opposed by three counterspindles (106) of substantially identical construction. The main spindles (66) can be indexed about the Z axis. The counterspindles (106) cannot be indexed, but they can translate along the Z-axis. Each main spindle (66) is hollow and contains a workpiece-grasping collet chuck (68). At least one of the counterspindles (106) contains a workpiece-grasping collet chuck (108). The main spindles (66) are rotated in unison, but the counterspindles (106) are rotated independently by computer-controlled motors. In the preferred embodiment, three tool-carrying turrets (20A, 20B, 20C) are radially spaced around the machine at three work stations. Preferably, the turrets (20A, 20B) located at the first and second workstations can be moved along both the X and Z axes, while the turret (20C) located at the third workstation can be moved along the X axis.

Abstract: The invention relates to a machining unit in which the pieces are carried by an electric turning spindle radially arranged on a turret with a vertical axis of rotation. On rotation of the turret the pieces are successively introduced into machining stations, arranged peripherally around said turret and comprising tool support means. A large space is thus available around the periphery of the machine for housing the tools. The electric turning spindles are adapted to selectively hold the pieces at any fixed angle, thus permitting not only turning operations but also other machining operations on fixed pieces.

Abstract: The invention relates to a machine tool, especially a lathe, comprising a machine frame upon which a first and second spindle housing carrier are arranged in such a way that they can move in a direction Z in relation to each other; a first working spindle; a second working spindle; a first tool carrier which is associated with the first working spindle; a second tool carrier which is associated with the second working spindle, said first and second tool carriers being arranged on the same side of the spindle axis; and a machine control unit.

Abstract: The present invention provides a lathe, comprising a machine frame, a first working spindle with a first workpiece receiving means, at least one first tool slide with a tool carrier, a second working spindle with a second workpiece receiving means which faces the first workpiece receiving means, and at least one second tool slide with a tool carrier, The machine frame has an elongated machine base member, having a first support section and a second support section arranged to follow the first support section. Each support section has a base side, a spindle support side located opposite this and two slide support sides located opposite one another and between the base side and the spindle support side. The first working spindle is arranged on the spindle support side of the first support section and the second working spindle is arranged on the spindle support side of the second support section.

Abstract: In order to design a lathe comprising a machine frame, a first working spindle for a first workpiece held on the machine frame, at least one first tool carrier for the machining of the first workpiece, a second working spindle for a second workpiece which can be brought from a coaxial position into a non-coaxial position in a transverse direction in relation to the first working spindle, and a first tool carrier on the front side associated with a first working space, and a second tool carrier on the front side associated with a second working space, in such a manner that it is possible for machining operations on the first workpiece and the second workpiece to be as flexible as possible, it is suggested that the first tool carrier on the front side and the second working spindle be movable in the transverse direction relative to one another controlled by a machine control.

Abstract: There is provided a numerically controlled lathe capable of simultaneously performing various kinds of machining to a plurality of workpieces. An NC lathe according to the present invention has a first main shaft 121 and a second main shaft, a first tool rest 160 to which a tool T1 and/or a tool T2 used to machine workpieces W1 and W2 grasped by these main shafts are attached, and a second tool rest 180 to which a tool T3 and/or a tool T4 used to machine the workpieces W1 and W2 are attached. The first tool rest 160, the second tool rest 180 and the second head stock 130 can move in the direction of a Z axis and the direction of an X axis without restraint. A numerical control device 191 controls movement of the first tool rest 160, the second tool rest 180 and the second head stock 130 in the direction of the X axis and movement of the same in the direction of the Z axis.

Abstract: A machine tool in which a plurality of machining positions is orbited by a work spindle unit carrying a workpiece and capable of radial displacement relative to the central axis of rotation. The work spindle unit may be one of one or more such units mounted upon a bridge element angularly displaceable about that axis.

Abstract: A sensor 42d is provided for detecting release of a state of a workpiece fixed and held with workpiece holding members during rotation of a spindle 9. When the release of the state of the wokpiece fixed and held is detected, the sliding members are driven in a direction of an axial center (in a direction as shown by an arrow D) by a reciprocating drive means 42. Even if holding force, such as the oil pressure of the workpiece holding member, is lowered, the decrease of the holding force of the workpiece can be extremely avoided by moving the sliding members in the direction of the workpiece.

Abstract: A method of processing a workpiece including the steps of: placing a first preform element in a first operative position on a first holder so that a first portion of the first preform element is exposed; performing a processing operation on the first portion of the first preform element with the first preform element in the first operative position; transferring the first preform element into a second operative position on a second holder; with the first preform element in the second operative position exposing a second portion of the first preform element that is not exposed for processing with the first preform element in the first operative position; and with the first preform element in the second operative position and the second portion of the first preform exposed, performing a processing operation on the second portion of the first preform element.

Abstract: A machine tool which can avoid interference between a tool post body and a second headstock without increasing the size of a fixed bed or decreasing the structural support rigidity is disclosed. Specifically, a combined-machining lathe comprises a first headstock fixed on a fixed bed; at least one of a tailstock and a second headstock is movably disposed on the fixed bed so as to be movable along the fixed bed; and a tool post body for rotationally supporting a turret having a plurality of tools set thereon. The tool post body is movably disposed between the first headstock and the at least one of a tailstock and a second headstock. The turret is placed on one side of the tool post body that is closer to the at least one of a tailstock and a second headstock, and the first headstock has a recessed portion that is dimensioned to accommodate the tool post body therein.

Abstract: There is provided a multi-turret lathe with two opposed spindles which is capable of machining a workpiece more effectively. The lathe with two opposed spindles includes: a first spindle (2); a second spindle (4) located opposite to the first spindle on the same axis and movable toward and away from the first spindle; and a set of two tool turrets (8a and 8c) which machines a workpiece cooperating with the first spindle, and another set of two tool turrets (8b and 8d) which machines a workpiece cooperating with the second spindle, and the two tool turrets in each of the sets are disposed opposite to each other about a spindle axis (B). Each of the four tool turrets is mounted on a tool slide which is movable and positionable in the direction of spindle axis and also in the direction perpendicular to the spindle axis. This enables each of the four tool turrets to be movable from a position to machine a workpiece held on one of the spindles and another position to machine a workpiece held on the other spindle.

Abstract: A machining system having a first machine tool assembly with a first workpiece holder and a first machining unit for performing a processing operation on a workpiece held by the first workpiece holder, and a second machine tool assembly having a second workpiece holder and a second machining unit for performing a processing operation on a workpiece held by the second workpiece holder. The machining system further includes a base assembly on which the first and second machine tool assemblies are supported in an operative position. At least a part of the first machine tool assembly is repositionable by movement along a first line. At least a part of the second machine tool assembly is repositionable by movement along a second line that is non-parallel to the first line. The parts of the first and second machine tool assemblies are relatively repositionable along the first and second lines to facilitate transfer of a workpiece between the first and second machine tool assemblies.

Abstract: A dual machining clutch apparatus (10) for a multiple spindle machine has at least two stations (20) for holding work pieces (22, 23). A first machining tool (24) is guided on a first slide (26). A controller (34) is notified that the earlier of the first or second machining tool has reached its selected position for completion of its machining operation. The respective machining clutch is de-energized, allowing its shaft to free-wheel. The later machining tool continues to perform its machining operation. As the later machining tool reaches its selected position for completion, the threading clutch for the earlier machining tool is engaged and the high speed clutch is engaged. The machining tools are then backed off the work piece to return to their original positions. The machining operation is complete and the main drum may index.

Abstract: In order to improve a machine tool comprising a machine frame, a first work piece spindle with a first work piece receiving means, a second work piece spindle with a second work piece receiving means which is arranged to face the first work piece receiving means, a first tool carriage disposed on one side of the first spindle axis and movable in the X direction in a position-controlled manner with a first tool carrier, for first tools in such a manner as to enable a work piece machining operation which is optimized with respect to the support sides, it is proposed that at least one further tool facing the second work piece receiving means is provided on the first tool carriage, that in order to conduct a machining operation of a work piece in the second work piece receiving means with the further tool simultaneously with a machining operation of a work piece in the first work piece receiving means with one of the first tools, the second work piece spindle is movable in X and Z direction, its position contro

Abstract: A headstock 10 having a chuck 12 and a tailstock 20 having a shaft 21 are mounted on a bed 1 and can move with respect to each other in the direction of the Z-axis, A carriage 50 is slidably mounted on the bad 1 and can move in the Z-axis direction with respect to the rotational axis of a spindle 11. A turning device (lathe tool) 30 is provided to perform a turning operation on a workpiece and a gear cutting device 40 is provided to perform a gear cutting on the workpiece. The turning device 30 and the gear cutting device are preferably slidably mounted on the carriage 50 in a side-by-side relationship. The turning device 30 and the gear cutting device 40 may have respective traverse slide bases 31 and 41. The traverse slide bases 31 and 41 are mounted on the carriage 50 and can move independently in the direction of the X-axis perpendicular to the axis of the spindle 11, i.e. in a traverse sliding direction.

Abstract: Sensors are incorporated into a multiple spindle automatic screw machine in such manner as to effectively monitor burring spindle retraction and stock supply and feeding. The lubricant/coolant level sensor is housed in a protective auxiliary chamber, and adaptations to the threading axis drive, the work spindle axis drive, and the cam axis drive improve performance of the machine while at the same time reducing its complexity.

Abstract: A machining center comprising a frame and, borne by this frame, two devices, referred to as workpiece support devices because each allows a workpiece to be machined to be supported and driven in rotation about a control axis, this machining center being characterized in that: each of the two workpiece support devices is supported by a device for control and for translatory displacement along a first axis, the said devices for control and for translatory displacement being actuated in such a way that each of the workpiece support devices is movable between a position of maximal distance from the opposite support device and a position of maximal bringing closer together with this opposite workpiece support device, the sum of the ranges of possible displacements of the two workpiece support devices being at least equal to the distance which separates the two workpiece support devices when they are placed in their maximal spaced apart position, the main device for holding and for displacement of at least one ma

Abstract: A safety shield for a machining apparatus includes a shield frame, and a curved shield member and a curved sliding door that are mounted on the shield frame to enclose a machining unit of the machining apparatus. The shield frame includes a rectangular base, a pair of lateral plates extending upwardly from the rectangular base, a top beam connected to top parts of the lateral plates, and a curved back plate having a top edge connected to the top beam, a bottom edge connected to a rear portion of the rectangular base, and a pair of curved lateral edges connected to the lateral plates, respectively. The shield member can be slid upward along a curved path to overlap the back plate, and the sliding door can be slid in the longitudinal direction of the rectangular base to permit access to the machining unit.

Abstract: A multi-height cutting apparatus includes a fixed cutting tool means disposed around a central axis, the fixed cutting tool means having at least one cutting edge, and a plurality of rotary cutting tool means spaced between the column and the fixed cutting tool means and respectively rotated to cut can bodies being delivered one after another through a circular path between the at least one cutting edge of the fixed cutting tool means and the rotary cutting tool means, the at least one cutting edge of the fixed cutting tool means each having a stepped cutting structure, the rotary cutting tool means each having a cutting edge in a stepped structure thereof corresponding to the at least one cutting edge of the fixed cutting tool means for cutting each delivered can body at different heights.

Abstract: A multi-height cutting apparatus includes a fixed cutting tool means disposed around a central axis, the fixed cutting tool means having at least one cutting edge, and a plurality of rotary cutting tool means spaced between the column and the fixed cutting tool means and respectively rotated to cut can bodies being delivered one after another through a circular path between the at least one cutting edge of the fixed cutting tool means and the rotary cutting tool means, the at least one cutting edge of the fixed cutting tool means each having a stepped cutting structure, the rotary cutting tool means each having a cutting edge in a stepped structure thereof corresponding to the at least one cutting edge of the fixed cutting tool means for cutting each delivered can body at different heights.

Abstract: A machine tool assembly having a frame, a workpiece holder, and at least one machining unit that is operable to perform an operation on a workpiece in an operative position on the workpiece holder. The frame has first and second spaced end supports and at least one reinforcing element which extends between the first and second end supports so as to maintain the first and second end supports in a desired operative relationship. The workpiece holder and at least one machining unit each are connected to at least one of the first and second end supports and at least one reinforcing element so that the machining unit can be operated to perform an operation on a workpiece in an operative position on the workpiece holder.

Abstract: There is provided a multi-turret lathe with two opposed spindles which is capable of machining a workpiece more effectively. The lathe with two opposed spindles includes: a first spindle (2); a second spindle (4) located opposite to the first spindle on the same axis and movable toward and away from the first spindle; and a set of two tool turrets (8a and 8c) which machines a workpiece cooperating with the first spindle, and another set of two tool turrets (8b and 8d) which machines a workpiece cooperating with the second spindle, and the two tool turrets in each of the sets are disposed opposite to each other about a spindle axis (B). Each of the four tool turrets is mounted on a tool slide which is movable and positionable in the direction of spindle axis and also in the direction perpendicular to the spindle axis. This enables each of the four tool turrets to be movable from a position to machine a workpiece held on one of the spindles and another position to machine a workpiece held on the other spindle.

Abstract: In order to design a lathe comprising

Abstract: A multi-spindle machine system includes a pick-up attachment. Both the rotational and the axial positions and speeds of the pick-up spindle may be selectively controlled. A plurality of clutches may be used to rotate the pick-up spindle at different speeds. The clutches operatively engage respective drive gears to drive the pick-up spindle. A brake may be used to slow or stop the pick-up spindle. A servo motor may alternatively be used to rotate the pick-up spindle at different speeds. Another servo motor may be used to axially position the pick-up spindle at different locations. The pick-up attachment of the system of the present invention provides selective programmable control of the movements of a pick-up spindle during work piece pickup, back machining, and dropping operations.

Abstract: A lathe is provided which includes at least one workpiece spindle which is rotatable about a spindle axis. The lathe includes two tool carrier systems each comprising a slide system having at least a Z slide and a X slide and further comprising a tool carrier. The tool carrier system is movable relative to the machine frame in a Z direction parallel to the spindle axis. Each of the tool carrier systems is guided independently of the other respective tool carrier system with its own Z slide in the Z direction on the machine frame. The tool carrier systems are arranged on the same side of the spindle axis and each tool carrier system is movable in the Z direction on a path extending towards the other tool carrier system. Each slide system has a guide plane for the X slide defined by a X guide.

Abstract: A machining center comprising a frame and, borne by this frame, two devices, referred to as workpiece support devices because each allows a workpiece to be machined to be supported and driven in rotation about a control axis, this machining center being characterized in that:

Abstract: A machining system having a first machine tool assembly with a first workpiece holder and a first machining unit for performing a processing operation on a workpiece held by the first workpiece holder, and a second machine tool assembly having a second workpiece holder and a second machining unit for performing a processing operation on a workpiece held by the second workpiece holder. The machining system further includes a base assembly on which the first and second machine tool assemblies are supported in an operative position. At least a part of the first machine tool assembly is repositionable by movement along a first line. At least a part of the second machine tool assembly is repositionable by movement along a second line that is non-parallel to the first line. The parts of the first and second machine tool assemblies are relatively repositionable along the first and second lines to facilitate transfer of a workpiece between the first and second machine tool assemblies.

Abstract: A multi-spindle automatic bar machine having a housing, a plurality of spindles, each with a collet at one end, and mounted with a rotating head which is carried by said housing, said rotating head being adapted to index the spindles through a plurality of tooling stations. An improved machine bearing carried by the rotating head comprising a cylinder having a circular inner bearing surface carrying a spindle having a spindle bearing surface. Each cylinder bearing surface is formed with a pair of opposed spiral grooves each separated by a spiral flat. Each spiral groove is adopted to provide a passageway for lubricant through and over the entire machine bearing lubricating the each flat and the entire spindle bearing surface.

Abstract: A machine tool has a cam shaft and indexing drive mechanism which is driven by a servomotor and is therefore adapted for operation within a wide range of operational parameters. An encoder mechanism provides feedback to the servo drive mechanism to effect operational control. The machine tool further comprises a variable frequency drive motor which operates the spindles of the machine tool independently of the cam shaft and indexing drive. A servo-operated threading mechanism is operable at one or more workstations of the machine tool to provide threading of parts manufactured thereby. A computer control system controls and monitors the entire operation of the machine tool.

Abstract: The combination of at least a first base, a first machine tool assembly placed in an operative position on the at least first base, and a second machine tool assembly placed in an operative position on the at least first base above the first machine tool assembly.

Abstract: In order to improve a lathe, comprising a machine frame, a first working spindle with a first workpiece receiving means, at least one first tool slide with a tool carrier, a second working spindle with a second workpiece receiving means which faces the first workpiece receiving means, at least one second tool slide with a tool carrier, in such a manner that this is constructed as compactly as possible it is suggested that the machine frame have an elongated machine base member, that the machine base member have a first support section and a second support section arranged to follow this, that each of the support sections have a base side, a spindle support side located opposite this and two slide support sides located opposite one another and between the base side and the spindle support side, that the first working spindle be arranged on the spindle support side of the first support section and the second working spindle be arranged on the spindle support side of the second support section, and that the firs