Abstract: A machine tool includes a plurality of modules, and a control means for controlling operation of the modules, wherein the plurality of modules include a fixed module and two movable modules. The control means includes a restriction means for restricting the movement of the two movable modules for allowing only one of the movable modules to be moved to a facing position facing the fixed module; and a determination means for determining the movable module to be moved to the facing position. The control means is configured to control the operation of the plurality of modules so that, when the operation under cooperation of the fixed module and one of the movable modules has been completed, the restriction means releases the restriction of the movement of the other movable module to the facing position.

Abstract: The present application relates to a wheel rolling device, which is composed of a lower lifting rotating system, first rolling systems, a synchronous clamping drive system, a second rolling system and a third rolling system. The present application may not only strengthen the center hole, the inner and outer rims, the upper and lower rims, the flange root and the like portion of the wheel by rolling, but also may strengthen the bolt holes and valve holes of the wheel by extrusion; at the same time, the present application has the characteristics of high automation, powerful function, advanced technology, strong versatility and safe and stable performance.

Abstract: A journal bearing (51) has spiral grooves (63, 64) on opposite ends (61, 62) of the journal bearing (51) as to face towards the opposing shaft surface and generate a flow of oil outwardly of the journal bearing (51) during shaft rotation. One bearing end has a clockwise spiral groove (63) which pumps lubricant fluid in a first direction. The opposite bearing end includes a reverse-directed, counterclockwise spiral groove (64) which pumps fluid in a second direction, opposite to the first direction. During clockwise rotation of the shaft (21), the lubricating oil flows in the first and second directions to lubricate the turbine and compressor sides of a turbocharger. The journal bearing (51) also may be flipped endwise so as to function during opposite, counterclockwise shaft rotation.

Abstract: An improved firearm accessory mounting interface 200 with a durable integral mirage shield 200 that adds minimal or no weight to a weapon system, is unlikely to snag and is comfortable to hold includes a tubular handguard's cylindrical sidewall which is preferably defined with four radially spaced quadrants each having, preferably, first and second spaced arrays of parallel, elongated grooves 232, 234 separated by an external surface with at least two spaced apart transverse notches 250 which are configured to define a firearm accessory mount rail segment 260 and ergonomically comfortable grasping surface that directs hot air away from the handguard's interior and provides a plurality of mounts compatible with accessory clamps configured to engage and hold a Picatinny rail.

Abstract: The machine tool system includes a machine tool, a loader and a support frame structure. The machine tool includes a bed and a processing equipment disposed above the bed to process a work. The loader includes a guide unit disposed above the machine tool and a movable body movable along the guide unit to load and unload the work relative to the processing equipment. The support frame structure includes left and right stands installed on a floor surface at left and right sides of the bed to support the guide unit from below and a reinforcement member inserted in a throughhole, which is provided in the bed so as to extend in a leftward and rightward direction, in a non-contact fashion without contacting an inner face of the throughhole, with left and right ends thereof connected to vertically halfway portions of the associated stands.

Abstract: A machining apparatus has a frame having an upright front wall and two vertical guides on the front wall carrying respective spindle units displaceable on the guides and each having a workpiece holder rotatable about a respective vertical axis and vertically shiftable between a respective upper machining station and a respective lower pick-up/drop-off station. A horizontal guide on the front wall carries a tool turret carrying a tool and shiftable along the horizontal guide between one position aligned with the axis of one of the spindles and another position aligned with the axis of the other of the spindles. A conveyor transports unmachined workpieces into the lower stations and machined workpieces out of the lower stations. Respective actuators shift the spindle units vertically along the respective axis between the lower stations and the upper stations.

Abstract: There is provided a workpiece supply/conveyance device that can remove a workpiece from a spindle and supply another workpiece to the spindle smoothly and in a short time. A workpiece holding section of one of a plurality of arms includes an unmachined workpiece holding section 29 for holding an unmachined workpiece and a machined workpiece holding section 21 for holding a machined workpiece.

Abstract: The present invention relates to a machine tool, in particular a lathe, having a machine frame 1, a first work spindle 21, arranged on a face of a first carrier portion 1a of the machine frame 1, for receiving a first workpiece W1, a second work spindle 22, facing the first work spindle 21 and arranged on a face of second carrier portion 1b of the machine frame 1, for receiving a second work piece W2, the spindle axis of the second work spindle 22 being aligned parallel to, in particular coaxial with, the spindle axis of the first work spindle 21, and two displaceable tool carrier slides 51 and 52 on each of which a tool-carrying tool carrier 61 or 62 is arranged. According to the invention, a third tool carrier 63 is provided which is displaceable between the work spindles 21 and 22 transverse to the spindle axes and which is arranged on a tool carrier face WTS3 of a central carrier portion 1c positioned between the first and the second carrier portion 1a, 1b.

Abstract: A machining apparatus has a frame defining a transfer station and a machining station thereabove, a spindle having a workpiece grab and vertically displaceable on the frame between an upper position with the grab in the machining station and a lower position with the grab in the transfer station, a tool holder horizontally displaceable on the frame toward and away from the machining station, and a workpiece conveyor extending through the transfer station. After shifting a deflector underneath the machining station into a side position out from underneath the grab, the grab is lowered to pick an at least partially unmachined workpiece in the transfer station off the conveyor and then raised with the workpiece into the machining station. The deflector is then shifted between a use position over the transfer station and under the machining station and a side position allowing the spindle to pass.

Abstract: A multi-axis turning center for turning operations includes a machine body, a tool rest means for holding a tool, a first headstock for holding a workpiece, and a second headstock disposed in confronting relation to the first headstock, for holding a workpiece. The second headstock has a front chuck and a rear chuck for gripping respective workpieces. The second headstock performs a workpiece changing function by swiveling about a central axis. The multi-axis turning center is capable of automatically changing the workpieces by itself while it is carrying out a machining process, without the need for a workpiece changer. The multi-axis turning center does not need to stop its machining process for changing workpieces, resulting in an increase in the utilization ratio thereof.

Abstract: A machine tool includes: a main spindle adapted to be rotatable with a workpiece chucked thereby; a tool spindle capable of moving in directions of three axes perpendicular to each other and capable of pivoting about one of the axes, the axis being perpendicular to the main spindle; an automatic tool changer adapted to detachably attach a first tool and a chucking unit to the tool spindle, the first tool being used for machining the workpiece chucked by the main spindle, the chucking unit being used for chucking the workpiece; and a tool post having a second tool mounted thereon, the second tool being used for machining the workpiece chucked by the chucking unit attached to the tool spindle.

Abstract: A tailstock device for a lathe includes a carrier defining an accommodation space for accommodating a hub mount. The hub mount is turnable relative to the carrier and has two angularly displaced stage posts extending radially and outwardly for mounting first and second holders, respectively. By turning of the hub mount, a selected one of the holders is moved to a working position to aligned with a longitudinal axis of a workpiece held thereby. The tailstock device can hold a variety of workpieces, and allow adjustment of the angle and position of a workpiece held thereby.

Abstract: A machining apparatus has a frame and two generally parallel horizontal guides on the frame, one of which extends through at least one loading station and through at least one work station. A slide carrying a pair of spindles each capable of gripping a workpiece is shiftable between positions with the spindles aligned with the stations. A tool holder is shiftable on the other of the guides toward and away from the work station. Respective guides between each of the spindles and the slide allow vertical movement of the spindles on the slide. Actuators shift the slide horizontally on the one guide, shift the tool holder horizontally parallel to the slide on the other guide, and shift the spindles vertically on the slide.

Abstract: Multispindle lathe comprising a machine frame (12), a spindle drum (14) which is arranged in the machine frame (12), is rotatable about a spindle drum axis (16) and is made up at least partially of segments (80) which are cut out from flat material in a stacking direction (82) parallel to the spindle drum axis (16) and extend in stacking planes (88) transverse to the stacking direction (82), these segments having receiving cutouts (90) and cooling channel cutouts (92, 96, 106) which overlap with one another such that the spindle drum (14) has spindle motor receptacles (30) for spindle motors (32) and a cooling channel system (120, 130, 180) separated therefrom by wall webs (98), characterized in that the cooling channel system has several channel subsystems (120, 130, 180) for a liquid cooling medium which are fed in parallel.

Abstract: There is provided a machine tool which holds a large number of tools and capable of performing various kinds of works without replacing the tools, which is easy to operate and which allows faster and accurate operations with less number of movable parts. A front tool post (141) and a back spindle (120) are configured to be integrally movable in a Y-axis direction, and a plurality of front working tools (140) and a plurality of back working tools (130) are disposed on the front and back tool posts (141) and (131), respectively, in a plurality of tiers in the Y-axis direction.

Abstract: There is provided a machine tool capable of working a workpiece regardless whether it is gripped by a front spindle or a back spindle while guiding a free end side thereof by one guide bushing (160), is simplify and compacted and suppresses an increase of a number of axes to be controlled. The machine tool comprises the front and back spindles (112) and (122) having one and same axial line and disposed opposite each other and a guide bushing (160) having an axial line identical with the axial line. The guide bushing (160) is disposed between the front and back spindles (112) and (122), is configured so that the guide bushing (160) can guide the workpiece on both ends of the workpiece (W), so that the workpiece gripped either by the front spindle (112) or the back spindle (122) can be inserted, and so that the guide bushing (160) is movable in an axial direction.

Abstract: A dental prosthesis manufacturing machine is disclosed. The machine includes two spindles each having a roughing tool and a finishing tool, a workpiece holder for holding a workpiece which forms the dental prosthesis, and a base supporting the two spindles and the workpiece holder. The machine is capable of simply alternating the roughing tool with the finishing tool according to the accuracy required when the workpiece is machined.

Abstract: The turning machine according to the present invention includes a displacement sensor (200) which measures a distance between an immobile reference point and a position of variable point which reflects the positional displacement of the tool, the immobile reference point being able to determine a relative positional correlation relating to a variable position of tools with the progress of machining of the workpiece (W) by the tool (421). In drawings the reference point is set up in the guide bush (90). And based on the measured result by the displacement sensor, the tool is moved so that the center height of the tool and the center line of the workpiece satisfy relatively the predetermined positional correlation. Accordingly, the center height deviation amount due to heat deformation and the like is corrected.

Abstract: In order to improve a machine tool comprising a first spindle for accommodating a workpiece and a first carrier for machining units movable along an X axis, which can be moved relative to one another along a Z axis, a second carrier which is movable along an X axis and with which machining units can be moved into or out of a functional position associated with the first spindle in a transverse direction extending transversely to the X axis and transversely to the Z axis, as well as an additional carrier for machining units in such a manner that it offers optimum possibilities for the machining of a front side of a workpiece and a rear side of a workpiece, it is suggested that the second carrier bear a second spindle, that as a result of movement of the second carrier the second spindle be movable in the direction of the Z axis and the transverse direction between a workpiece takeover position and at least one workpiece machining position and that the additional machining units be arranged in a spatial area, i

Abstract: A turning machine having: a machine frame with a longitudinal axis; a rotary part driver for rotating a part about the longitudinal axis; three tools mounted on the frame, each tool having a radial tool axis transverse the longitudinal axis and each radial tool axis being disposed in a circumferential array spaced apart by substantially 120°; wherein each tool has an independent radial actuator and an independent longitudinal actuator, wherein each tool is movable radially and longitudinally relative to the part and relative to the other two tools.

Abstract: A machine for machining workpieces, for example plastic spectacle lenses, has a workpiece spindle which rotates the workpiece about a workpiece rotation axis, and a fast tool arrangement which moves a turning tool in the direction to and from the workpiece, wherein the workpiece spindle and the fast tool arrangement can moreover be moved relative to one another in a direction transverse to the workpiece rotation axis. A tool holder is connected to the fast tool arrangement and carries the turning tool. An engraving tool is spaced from the workpiece rotation axis and has an essentially point-shaped end facing towards the workpiece. The engraving tool can be moved in the direction of the workpiece and away therefrom in a highly dynamic manner via the tool holder, so that a marking can be produced on the workpiece in particular by a needling engagement of the engraving tool with the workpiece.

Abstract: A machining apparatus (1) for machining rotation-symmetrical workpieces (10), comprising a machine frame (4), which has a vertical front face (11), further comprising at least one vertical workpiece spindle (2) that is arranged on the front face (11) and can be driven rotatorily, comprising at least two tool holders (3 and 3a), which are arranged on the front face (11) displaceably horizontally and vertically by means of compound slides (5 and 5a), further comprising a conveyor (9) for workpieces (10), and a loading and unloading device (13), wherein the workpieces (10) can be transported by the conveyor (9) in a direction parallel to the front face (11).

Abstract: A machining apparatus has a vertical support frame defining two machining stations spaced apart in a direction, holders in the stations for rotating respective workpieces each about a respective station axis, and a transfer device for loading rough workpieces into the holders and for taking finished workpieces out of the holders. A single machining tool can be shifted in the direction between one position engaging the workpiece in one of the stations and out of engagement with the workpiece in the other of the stations and another position engaging the workpiece in the other station and out of engagement with the workpiece in the one station.

Abstract: A tool carrier device for adjustable arrangement of tools along a forming path comprises two carrier rails arranged so as to run parallel to one another in the longitudinal direction of the forming path and above the latter, at least one cross member which can be detachably connected to both carrier rails at a plurality of predetermined positions along the forming path in such a way that the cross member is arranged transversely to the longitudinal direction of the forming path, and at least one tool holder which can be detachably connected to the cross member.

Abstract: There is provided a precision roll turning lathe which can machine with high precision a three-dimensional pattern of three-sided pyramids or four-sided pyramids in the surface of a roll.

Abstract: A roll turning lathe is provided herein which can not only machine with high precision circumferential transverse grooves in the peripheral surface of a roll but can also machine with high precision longitudinal grooves in the peripheral surface. The precision roll turning lathe includes a fly cutter spindle device and a tool post having a plurality of cutting tools that are mounted on a tool swivel. By selectively using the tool post and the fly cutter spindle device, high-precision machining of transverse grooves and longitudinal grooves on a roll-shaped workpiece.

Abstract: A machine for processing optical work pieces having a work piece spindle for the work piece driving rotationally about a work piece rotation axis. At least one processing unit has a tool that can machine the work piece and an adjusting mechanism causes a relative movement between the work piece spindle and tool to selectively enable loading, unloading and processing of the work piece. The adjusting mechanism has a linear drive unit and a swivel drive unit that are stacked on each other to rotate the swivel drive unit and the work piece spindle about a swivel axis that is perpendicular to the work piece rotation axis, and has the linear drive unit move the work piece spindle along a linear axis that can be perpendicular to one of the swivel axis and the work piece rotation axis and parallel to or aligned with the other axis.

Abstract: An automatic screw machine (20) has a body (22), and a head (21) that is rotatably mounted on the body and that is adapted to be selectively rotated relative to the body between any of a plurality of index positions. The body and head have closely-spaced and facing bearing surfaces (25, 28 and 26, 29), have spindles (23) journalled on the head for rotation relative thereto, and have a source of pressurized lubricant.

Abstract: A machine tool having a machine frame. A first workpiece carrier unit is disposed on the machine frame and has a workpiece receiving mechanism. At least one tool carrier unit is disposed on the machine frame, on which at least one tool for machining a workpiece held in the workpiece receiving mechanism is disposed. In an embodiment, there is a working space, in which a workpiece, held in the workpiece receiving means, can be machined with the tool. In an embodiment, the tool carrier unit has a tool carrier base and a tool carrier head, which is movable in relation to the tool carrier base along an axis of advance via a guiding arm. The tool carrier head is rotatable about an axis of rotation coincident or parallel to the axis of advance, by the tool carrier head being fixedly connected to the guiding arm and by the tool carrier head being formed as a multiple tool carrier which has at least two tool planes, in which at least one respective tool extends in at least one of its tool directions.

Abstract: The present invention provides a precision roll turning lathe which can form a pattern including three-dimensionally shaped portions, such as three-sided pyramids, on the surface of a roll, with high accuracy. Specifically, a tool post is provided with a tool turning axis (A axis) which is used to turn a tool such that, when forming a spiral groove cut through the roll, a cutting face of a tip of the tool is oriented perpendicular to a direction along which the spiral groove extends.

Abstract: An apparatus and method for machining of components, namely for rotary machining of rotationally symmetrical components on radially interior machining surfaces of a component, is disclosed. The device has a drill rod extending essentially axially and has a tool mount extending essentially radially, carrying a lathe tool. The drill rod has a projection that extends essentially radially and can be coupled to the tool mount that extends essentially radially, where the radial dimensions of the projection of the drill rod and of the tool mount are adapted to the dimensions of a hub bore of the component to be machined, such that the drill rod and the tool mount in the uncoupled state can be inserted into the hub bore, and, in the coupled state, the lathe tool mounted in the tool mount can be brought into contact with the radially interior machining surfaces of the component.

Abstract: A method for machining particularly spectacle lenses by means of a machine which comprises at least one cutting unit and at least one turning unit in a common working space, wherein at least two spectacle lenses are machined at the same time in the working space, one of said spectacle lenses being cut while the other is turned. The machine frames of the cutting unit and of the turning unit are essentially decoupled from one another in terms of vibration and/or at least two machining units of the machine comprise workpiece spindle units for generating a transverse movement of the spectacle lens to be machined with respect to the respective tool, the workpiece spindle units being arranged essentially perpendicular to one another. As a result, it is possible for spectacle lenses to be machined in an extremely short time with high machining performance and with high surface precision and quality.

Abstract: A multiple-spindle turning machine has an upright structure supporting a rotary drum which, in turn, supports a plurality of workpiece supporting spindles. On the upright, at each spindle, a cross slide adapted to support a plurality of machining tools to be used for machining the front portion of a workpiece is provided. The machine tool further comprises, in front of the rotary drum, parallel guides which are arranged crosswise of the machine bed, on the guides being slidably mounted two slides each including a workpiece supporting spindle. On the two sides of the machine tool, near each spindle, a vertical slide adapted to support a plurality of machining tools for machining the rear portion of the workpiece is arranged.

Abstract: The present invention provides a machine tool with a spindle chuck replacing mechanism which is simply configured to enable a reduction in time for work replacement without the need to sense the rotation speed of a spindle chuck or the like. The machine tool includes a pre-rotation-transmission mechanism 7 transmits rotation of a spindle motor 4, via a path different from a chuck coupling portion 3a of a spindle 3, to a spindle chuck 5 placed in a processing position P1 and not coupled the chuck coupling portion 3a. The pre-rotation-transmission mechanism 7 makes a difference in rotation speed between the spindle chuck 5 and the spindle 3. The pre-rotation-transmission mechanism 7 has a speed difference absorbing mechanism 23 that absorbs the difference in rotation speed with the spindle chuck 5 coupled to the chuck coupling portion 3a.

Abstract: A turning machine having: a machine frame with a longitudinal axis; a rotary part driver for rotating a part about the longitudinal axis; three tools mounted on the frame, each tool having a radial tool axis transverse the longitudinal axis and each radial tool axis being disposed in a circumferential array spaced apart by substantially 120°; wherein each tool has an independent radial actuator and an independent longitudinal actuator, wherein each tool is movable radially and longitudinally relative to the part and relative to the other two tools.

Abstract: An object of the present invention is to provide a machine tool with a spindle chuck replacing function which has a simple configuration and enables a reduction in work replacement time. The machine tool with the spindle chuck replacing function includes a spindle 3, a spindle motor 4, a plurality of spindle chucks 5, 5, a spindle chuck replacing mechanism 10, a pre-rotation motor 7, a rotation speed sensing arrangement, and a replacement spindle motor speed control device. The replacement spindle motor speed control device controls the rotation speed of the spindle motor 4 according to a speed sensed by the rotation speed sensing arrangement so that when the spindle chuck replacing mechanism 10 passes the spindle chuck located at a spindle opposite position P1 to a chuck coupling portion 3a of the spindle 3, the rotation speed of the spindle 3 synchronizes with the rotation speed of the spindle chuck 5 located at the spindle opposite position P1.

Abstract: Turrets (11, 12), which can rotate about a common axis (y-y) and on the outer peripheral surfaces of which a plurality of tools (15) are radially installed, are disposed along the axis (y-y) in a turret housing (100). Respective turrets (11, 12) can be dividedly rotated by separate turret driving motors (13, 14).

Abstract: The invention relates to a metal working or forming machine and a spinning/flow forming method. A main spindle is provided and can be driven in rotary manner about a vertically directed rotation axis. Furthermore, a tailstock spindle can be driven in rotary manner about a rotation axis and is coaxial to the main spindle. A machine lower bed and a machine upper bed are interconnected by means of vertically directed machine columns. At least one working roll is radially infeedably guided. According to the invention at least three machine columns are arranged distributed around the rotation axis, which define a working area and form three lateral passage or transit areas. At the first passage area is provided a supply device and at the second passage area a removal device. At the third passage area is provided a machining unit, which is readily detachable and removable for forming an access to the working area.

Abstract: In a method of machining a work in a numerically controlled lathe, it is possible to reduce machining cost by shortening idle time at the time of switching and to enhance the lifetime by lessening a load on a feeding mechanism of a tool rest. After completion of the machining of a work W with a tool T1 on one tool rest (13), the one tool rest (13) is moved to a standby position B and, at the same time, the other tool rest (15) is moved from a standby position D and the feed speed of the other tool rest (15) is controlled such that the one and the other tool rests (13, 15) simultaneously reach positions C and F preset between the work W and the standby positions B and D.

Abstract: A rotary tool-equipped tool rest is provided, including a movable member made to move frontwardly when a turret is clamped with respect to a non-swiveling housing after swiveling and indexing. Then, a phase determining pin provided in the turret is made to project and engage with the non-swiveling housing. Further, a coupling mechanism to clamp the turret with respect to the non-swiveling housing has three coupling members.

Abstract: A machine for machining optical workpieces, is equipped with a workpiece spindle, by which the workpiece can be rotatably driven about a workpiece rotation axis, and with a first fast-tool assembly, by which a turning cutter is movable in the direction of the workpiece and away from it. The workpiece spindle and the first fast-tool assembly are also movable relative to each other in a direction transverse to the workpiece rotation axis. Provided adjacent to and preferably in parallel configuration with the first fast-tool assembly is a second fast-tool assembly with a graver which has its end that faces the workpiece being essentially punctiform. The graver is movable by the second fast-tool assembly, in the direction of the workpiece and away from it, so that a marking of any geometry can be produced on the latter in the same span.

Abstract: A carriage is moved in a direction including a Y axis component in order to move a turning process tool that is attached to a tool spindle along a horizontal line that is perpendicular to a Z axis, and thus, a turning process is carried out on a workpiece which is attached to a workpiece spindle.

Abstract: An apparatus and method for machining of components, namely for rotary machining of rotationally symmetrical components on radially interior machining surfaces of a component, is disclosed. The device has a drill rod extending essentially axially and has a tool mount extending essentially radially, carrying a lathe tool. The drill rod has a projection that extends essentially radially and can be coupled to the tool mount that extends essentially radially, where the radial dimensions of the projection of the drill rod and of the tool mount are adapted to the dimensions of a hub bore of the component to be machined, such that the drill rod and the tool mount in the uncoupled state can be inserted into the hub bore, and, in the coupled state, the lathe tool mounted in the tool mount can be brought into contact with the radially interior machining surfaces of the component.

Abstract: A compact, economical, and easy-to-use small parts machine tool that can machine small parts from bar stock as well as castings, forgings, slugs, and near net shape raw materials, is comprised a base with a spindle for moving a workpiece, a first carriage connected to the base that moves along a Z axial direction, a second carriage connected to the first carriage that moves along a Y axial direction, a third carriage connected to the second carriage that moves along an X axial direction, and a tool holder system that holds a plurality of machining tools.

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: A numerically controlled machine tool can simultaneously perform a variety of machining operations using work on a first main shaft and work on a second main shaft. A first tool post is movable together with a second main shaft in the direction of a main shaft axis and in a direction orthogonal thereto in a plane, while a second tool post is movable at least in the same biaxial direction as the directions of movement of the first tool post. A control device superposes the movement required for the first tool post to machine work on the movement required for the second tool post to machine work, so that the machining operation of the work by the tool on the first tool post and the machining operation of the work by the tool on the second tool post are simultaneously performed.

Abstract: To provide a composite lathe enabling the overlapping of movement areas without lowering supporting stiffness of a tool post, and thus realizing enhanced machinability. An XY supporting plane A by which a tool post 5 in is supported to be movable in an X-axis direction is set non-parallel to an XZ supporting plane B by which a third spindle 6 is supported to be movable in the X-axis direction, and an axis of the movement in the X-axis direction of the tool post 5 is set apart in a Y-axis direction from an axis of the movement in the X-axis direction of the third spindle 6.

Abstract: To provide a machine tool in which positioning accuracy of a ram is ensured, realizing improved machining accuracy. A cylindrical ram 14 supporting a spindle 6 is inserted in a ram guide hole 13a formed in a cross slide 13, the ram 14 has supported surfaces 14d, 14d in a V-shape formed on a lower side of an outer circumferential surface thereof, and the supported surfaces 14d are placed on supporting surfaces 22a, 22a in a V-shape formed on an inner circumferential surface of the ram guide hole 13a of the cross slide 13, so that a Z-axis direction position of the ram 14 is automatically aligned.

Abstract: To provide a composite lathe enabling downsizing of a machine main body and realizing an enlarged machining area. A cutting point “c” of a tool post 5 is positioned vertically under a straight line connecting axes “a” of a first spindle headstock 3 and a second spindle headstock 4, and an X-axis stroke of a cutting point of a third spindle 6 overlaps an X-axis stroke of the tool post 5 by a half or more of the X-axis stroke of the tool post 5.

Abstract: To provide a tool changer of a machine tool capable of preventing chips from scattering to the outside of the machine from an opening of a cover to adhere to a sliding portion or a gripper portion during tool change. A tool magazine 42 holding a large number of tools is disposed on a machine outer side of a cover 62 disposed to surround a machining area of a third spindle 6. The cover 62 has a tool through hole 62c from which a tool held by a tool holding part 6c of the third spindle 6 is protruded to the machine outer side of the cover 62. Tool change is performed while the tool is protruded to the machine outer side from the tool through hole 62c and the tool through hole 62c is closed by the tool holding part 6c.