Abstract: A Cartesian machine tool, of the type with a horizontal slide and a machining head supported in a cantilever manner by the slide, includes a slide carriage, with respect to which the slide can move horizontally with corresponding elements of horizontal translation, and a post, which includes two opposite guiding columns for the vertical movement of the slide carriage with elements of vertical translation. The slide carriage includes a first front part coupled to the post with the elements of vertical translation and a second rear part coupled to the first part with elements of translation in a transverse direction with respect to a direction of motion of the slide with respect to the carriage.

Abstract: An installation for calibration of a stress gauge for an external bearing block of a turbomachine roller bearing, the bearing block including a radially internal roller bearing race. The installation includes a support table on which the bearing block is attached; an internal roller bearing ring mounted coaxial with the bearing block; a drive shaft driving the ring. The installation also includes a device for applying an axial stress to the bearing block including a support drum on which the internal ring is removably fixed and a connection with the device for applying the axial stress.

Abstract: The present invention relates to a compensation system for compensating for the drop of the ram in a machine tool, comprising a vertical translation carriage (1) incorporating the application ram, at least one and preferably two perforated plates (2) being arranged on said carriage (1), on each of which there is incorporated a fixed sliding block (3) and movable sliding blocks (4), which blocks are linked with a guide for the transverse movement of the ram, such that the drop of the ram is compensated for by means of the controlled bending of the plates (2).

Abstract: A milling machine has a base, a work platform mounted movably on the base, and a ruler mounted on the work platform. The work platform is movable relative to a base axis. The thermal compensation system includes a sensor and a control unit. The sensor is configured to be mounted on the base for sensing a position of each of the work platform and the ruler relative to the base axis. The control unit is coupled to the sensor, and determines a work platform displacement and a ruler displacement according to the positions sensed by the sensor. The control unit further calculates a compensation value based on the work platform displacement and the ruler displacement. The control unit is configured to correct the position of the work platform relative to the base axis according to the compensation value.

Abstract: A spindle control system for a milling machine is provided. The milling machine includes a column, an overarm, a spindle for mounting a cutter, a first motor mounted on the column for driving movement of the overarm, and a second motor mounted on the overarm for driving rotation of the spindle. The spindle control system includes a distance sensor and a temperature sensor, each to be mounted on the overarm and to be disposed proximate to the end portion of the spindle. The spindle control system further includes a central control unit for determining a compensation parameter based on the displacement sensed by the distance sensor and the temperature sensed by the temperature sensor, and for controlling movement of the overarm by the first motor through a compensation distance based on the compensation parameter to compensate for at least one of the cutter deformation and the spindle deformation.

Abstract: A cutting plotter includes a medium supporter, a first guide rail, a second guide rail, a carriage, a work tool, a working controller, and a second direction displacement detector. The second direction displacement detector is configured to measure a second guide rail displacement amount. The second guide rail displacement amount indicates a magnitude of displacement of a moving path of the carriage from a predetermined moving path with respect to the second guide rail in a direction perpendicular to a second direction when the carriage is moved in the second direction along the second guide rail. The working controller is configured to execute a control in which a movement control of the second guide rail on the first guide rail is added so that the second guide rail displacement amount is corrected in a movement control of the carriage on the second guide rail.

Abstract: A cooling method and cooling apparatus which can reduce thermal deformation of a mobile body of a machine tool is provided. On the front of a column (1), a pair of upper and lower guides (3) is formed, and saddle (7) is suspended on guides (3), saddle (7) being movable left and right. Guiding surface (5) of guide (3) and sliding surface (9) of saddle (7) are slip surface and are in contact with each other. Sliding surfaces (9a, 9b, 9d, 9e) which generate a large amount of heat and need to be cooled are identified in advance by simulation. Fluid pipelines (25) for cooling the identified portions generating higher heat are formed, and a coolant liquid is circulated by being passed from portion (9a) generating less heat toward portion (9e) generating higher heat.

Abstract: A device is provided for correcting the position of at least one element of a machine tool, in particular a milling machine, in which at least one compensating element is disposed between a machine element and an element whose position is to be corrected. The compensating element is adjustable by an actuating distance such that, as a result of the actuation of the compensating element, the element is pivotable about a pivot axis at a joint between the machine element and the element of which the position is to be corrected which ensures the pivoting movement about the pivot axis.

Abstract: A fixing structure of a spindle balancer for a machine tool is described as having a flange member having a supported surface and provided fixedly to a cylinder body of a gas spring, a supporting member having a flange receiving surface and a fixing hole, and secured to the spindle head of a machine tool, and a plurality of fastening members for fastening the flange member to the supporting member so as to allow the supported surface of the flange member to abut against the flange receiving surface of the support member.

Abstract: A machining tool for machining a panel is arranged in a working area of a machining surface of the panel. A holding element is arranged in a support area located on a holding surface of the panel, opposing the machining surface and on an opposite side in relation to the panel to the working area. The operating machining tool and the holding element are displaced on the panel in a co-coordinated manner according to movement presenting at least one component tangentially to the surface of the panel in such a way as to maintain the opposition of the support area and the working area during the displacement of the tool in order to machine at least a part of the machining surface.

Abstract: In a multi-axis machine tool comprising a first slide way (2a) and a second slide way (2b) set apart one from the other and extending parallel along a longitudinal axis (X), a machining station (3) delimited laterally by the slide ways (2a, 2b), a cross member (4) presenting opposite ends (4a, 4b) each coupled to a respective slide way (2a, 2b), and a machining head (5) mounted to the cross member (4) and positionable over the machining station (3), at least the cross member (4) is fashioned from a low thermal expansion material.

Abstract: A mechanical method for machining flexible panels, in particular panels with a complex shape, in which the panel to be machined is held fixed on its periphery on a rigid support, and a machining tool is applied against one of the faces of the panel and is controlled to perform the desired machining. The method includes at least counterbalancing the machining force exerted by the tool on the panel by applying a force approximately opposing the tool through an appropriate means of support on a face of the panel opposite the face where the tool is applied, with the means of support being independent of the tool.

Abstract: A machine tool includes a table supported by a bed for forward and rearward movement along a path of movement, left and right transversely aligned upright columns on opposite sides of the path of movement, a cross rail supported in the columns for movement upwardly and downwardly along forward and rear guide rails on inwardly facing column surfaces, a spindle head supported by the cross rail for movement leftwardly and rightwardly. The cross rail, the left and right columns, the spindle head and the guide rails are symmetrically positioned from front to rear and vertically by vertical or horizontal symmetry defining planes so that heat generated creates balanced self-cancelling forces.

Abstract: A machine tool for performing a machine tool function including components adapted to cooperate with each other to execute the machine tool function. The machine tool has a number of constituent parts and a number of sheets of damping material. Each component includes constituent parts with sheets of damping material interposed between the constituent parts. The sheets dampen vibration of the machine tool during performance of the machine tool function.

Abstract: In a numerical-control machine tool use is made of a mandrel-holding structure that makes it possible for the machine tool to be used to smoothing/facing and polishing purposes under utilization of traditional pan-like tools, in which the force acting on the working tool is delivered by a pre-established adjustable pneumatic pressure, while the weight of the moving parts of the mandrel is compensated for by a compression spring. When the pneumatic pressure is substituted for by an oleodynamic, i.e. oil-pressure force acting in the opposite direction, the machine switches over to normal operating conditions as a regular numerical-control machine tool.

Abstract: A device for detecting thermally caused linear expansions of a machine element, wherein the device includes a temperature sensor placed along an expansion direction. The temperature sensor includes a first metallic conductor having an electrical resistance that is proportional to an average temperature of an area to be monitored and a plurality of trimmer tracks in the form of further metallic conductors placed next to the first metallic conductor. The temperature sensor further includes electrical connections selectively interconnecting the plurality of trimmer tracks with the first metallic conductor and wherein the plurality of the trimmer tracks have an effective electrical resistance that is proportional to the average temperature of the area to be monitored.

Abstract: A machine tool capable of performing an accurate machining by preventing a second saddle 6 from displacing aslant to suppress the vibrations of a spindle head 8, wherein a column 2 is fixedly installed on bed 1, a first saddle 4 is movably guided by the column 2 in vertical direction f1, a second saddle 6 is movably guided by the first saddle 4 in lateral direction f2, a spindle head 8 is movably guided by the second saddle 6 in longitudinal direction 18, and interfitted guide route devices 5A, 5B, 5C for guiding the second saddle 6 in lateral direction f2 are formed at the rear lower position of the first saddle 4 as well as at the front upper and lower positions of the first saddle 4.

Abstract: An apparatus for compensating position error of a spindle head, comprises: Y-axis control parts 32a, 32b for controlling first and second servomotors 24a, 24b on the basis of a spindle head moving command fed from a numerical control unit 30; a correction data storage part 36 for storing correction data determining the relationship of a feed distance of a ram 18 to a compensation value for correcting the vertical deviation of the ram 18 in the feed distance of the ram 18; and a correction means 44 for being introduced a ram feed instruction, which is fed from the numerical control unit, and for reading out compensation value corresponding to the feed distance of the ram from the correction data storage unit 36, to correct the spindlehead feed instruction by adding or subtracting the compensation value to or from the spindlehead feed instruction.

Abstract: A machine tool driven by linear motors along a plurality of axes, and unusually robust and rigid, comprises a bed which defines at least a first axis, at least one column operably connected and supported only at one of its ends by said bed, for its guided movement along the first axis, said at least one column extending away from the bed to define a second axis, at least one saddle mount operably connected and supported by the at least one column, for its guided movement along the second axis, at least one main saddle supported by the saddle mount, for its guided movement along a third axis and supporting a spindle for the movement of a tool, wherein said at least one column comprises a portal structure having a first shoulder opposed to a second shoulder such as to define a window within which the saddle mount is arranged, and wherein, between said opposed shoulders and the saddle mount, linear motors are interposed such as to move the saddle mount along said second axis, producing an effect of attraction of

Abstract: It is provided a support and guide device for small machine tools, in particular for rotating-mass balancing machines, comprising: a base element (2), at least one moving element (3) in engagement with the base element (2), support elements (4) for the moving element (3), and drive members (5) controlling shiftings of the moving element (3), the support elements (4) comprising at least one elastically deformable thin sheet (7) oscillatably supporting the moving element (3), and the drive members (5) being active on the moving element (3) to shaft the latter against the action of the elastically deformable thin sheet (7).

Abstract: A prestressing device for a mechanical component of a mechanical finishing device has at least one rigid prestressing unit mounted in the mechanical component. This can provide a prestressing tension to the mechanical component. The bending and the deformation of the mechanical component can be prevented. The useful life of the mechanical finishing device is prolonged.

Abstract: A method for reducing computational expenditure required to compensate for temperature-related dimensional deviations in a machine tool is described. Temperature-related dimensional deviations are compensated for before the user input information existing in the workpiece-specific coordinate system is converted into the machine-specific coordinate system. As a result, the requisite coordinate transformation carried out with the aid of a mapping matrix does not have to be performed twice, once for user input information and again for compensation values. In addition, the compensation values for the temperature-dependent expansion are only calculated when a minimum value for the temperature variation is exceeded.

Abstract: A prestressing device for a mechanical component of a mechanical finishing device has at least one rigid prestressing unit mounted in the mechanical component. This can provide a prestressing tension to the mechanical component. The bending and the deformation of the mechanical component can be prevented. The useful life of the mechanical finishing device is prolonged.

Abstract: In a machine tool having a base member, a member moveable relative to the base member, an elongated drive screw supported on the base member and an operative connection between the moveable member and the drive screw whereby upon driving the drive screw the moveable member will be caused to be displaced relative to the base member, an anti-whip device generally consisting of a drive screw support member pivotally supported on the base member, having angularly spaced arm sections alternatively disposable in a line of travel of the operative connection and engageable with the elongated drive screw in supporting relation at points intermediate the ends thereof, each of the arm sections being engageable by a component of the moveable member as it traverses in a selected direction to cause the arm section to pivot out of its drive screw support engagement, ahead of the operative connection, and simultaneously cause the other of the arm sections to pivot into its drive screw support engagement, behind the passage o

Abstract: A high throughput drilling system for printed circuit board hole formation. Two spindles are disposed at each spindle station, doubling the number of holes produced in a given time period. Each spindle in connected to an overhead linear drive by a mini slide. A first set of the spindles, one for each spindle station, is driven by a first X axis linear drive. A second set is driven by a second X axis linear drive. The work piece table is elongated to support work pieces for all stations, and is supported by a set of bearing guides, with outrigger bearings coupled to the table by flexure mounts that relieve stress due to differential temperature expansion rates between the work piece table and the base table. High speed spindles are employed to obtain higher productivity, with larger holes routed by router tools, eliminating the need for stocking large drill sizes on the system tool changer.

Abstract: Plural spaced actuators mounted along a first axis are used to control machine tool motion along a first axis. The plural actuators are used in synchronism to create linear motion of the machine tool and the tool tip mounted on the machine tool along the first axis. The plural actuators are used differentially to create angular motion of the tool tip about an axis which is orthogonal to the first axis in order to correct angular errors in the axis of the tool.

Abstract: It is provided a support and guide device for small machine tools, in particular for rotating-mass balancing machines, comprising: a base element (2), at least one moving element (3) in engagement with the base element (2), support means (4) for the moving element (3), and drive members (5) controlling shiftings of the moving element (3), the support means (4) comprising at least one elastically deformable thin sheet (7) oscillatably supporting the moving element (3), and the drive members (5) being active on the moving element (3) to shift the latter against the action of the elastically deformable thin sheet (7).

Abstract: A machine alignment compensation actuator system is disclosed. The system is designed to selectively orient the tool head of a machine tool to maintain the tool along a desirable axis of alignment. The system includes a framework and a machine slide assembly configured to hold the tool. An actuator assembly having a plurality of actuators is disposed between the machine slide assembly and the framework. Each actuator is disposed at a unique location to permit selective reorientation of the machine slide assembly and tool with respect to the framework.

Abstract: A vertical milling or boring machine has a tool head supporting column which rides on base mounted rails. A ball, screw extends along the base under the column. Each column has a motor driving a nut carried by the ball screw. The nut is caged by the column so that rotation of the nut moves the column along the rails. To prevent ball screw droop, a slidable block is provided on either side of the column which operate as follows. The column pulls one of the these supports along until it latches to a post proximate the middle of the ball screw whereupon this latch overcomes the connection between the column and the slidable support leaving the slidable support latched to the post. When coming back the other way, the column pulls the other slidable support. The column pushes the first support off the post and latches to the first support when the column encounters the first support and leaves the other slidable support latched to the post once the column passes the post.

Abstract: In a machine tool having a base member, a moveable member and a drive screw assembly for displacing the moveable member relative to the base member, an anti-whip device for the drive screw assembly generally consisting of a support member mounted on the base member and displaceable between a first position supporting an elongated drive screw, and in a path of travel of the moveable member and a second position not supporting the drive screw and out of the path of travel of the moveable member, yieldable means for biasing the support member into the first position and means disposed on the moveable member and engageable with the support member for camming the support member from the first position to the second position against the biasing action of the biasing means when the drive screw is driven and the moveable means is caused to traverse past the support member.

Abstract: A machine tool having torsional compensation for the machine tool support. Generally, a machine tool head is movably mounted on a cross member in such a way that it induces a torsional couple in the cross member. A mechanism is provided for inducing a torsional couple in the cross member which is substantially opposite to that produced by the supporting of the machine head. In one embodiment this mechanism is a tube which has one end rigidly interconnected with the cross member and another end which is movable relative to the cross member. A torsional force may be induced within the tube by movement of the second end relative to the cross rail and at least a portion of this torsional force is thereby transmitted to the cross member by the rigid interconnection of the first end of the tube with the cross member.

Abstract: A machine tool comprises a frame; a work holder operably associated with the frame; at least one carriage disposed on the frame and movable along an axis; at least one tool disposed on the carriage for operating on a work piece disposed in the work holder; at least one nozzle assembly disposed on the carriage for directing at least one fluid stream to the work piece and the tool; a screw-nut drive operably associated with the carriage, the drive including a lead screw; a device for stretching the lead screw for compensating for thermal growth of the screw during operation; and a resilient strip operably disposed between the frame and the carriage for absorbing impact forces.

Abstract: A machine tool comprises an elongated beam adapted to be supported in a horizontal orientation at two locations spaced apart therealong and adapted to support a machining head. Tensioning bars extend parallel to the beam and engage the beam at opposite ends thereof. At least one of the tensioning bars is below the medial plane of the beam, and the tensioning bars are selectively operable to eliminate deflection from the beam.

Abstract: A machine tool frame is disclosed which is comprised of twelve struts connected together at their ends in six nodes to define the eight triangular panels of an octahedron. Forces generated by the operation of the machine tool are received by the frame at its nodes, being the nodes of opposed parallel triangular panels, upper and lower, in the specific examples illustrated. The octahedral frame displays superior rigidity due to its inherently closed kinematic loop, and to the virtual absence of bending stress in its constituent members accomplished by nodal loading. Movable machine elements are mounted upon six extensible and retractable servo-struts emanating in pairs from the nodes of a given triangular panel of the octahedral frame while opposing fixed elements located within the octahedral frame are supported tripodally from the frame nodes associated with a single triangular panel of the frame.

Abstract: A machine tool position correcting method and apparatus applied to a machine tool including a spindle head provided on a column and a ram which is movable horizontally on the spindle head and has a main shaft to which a tool is mountable. In the arrangement, a quantity of horizontal movement of the ram is detected, a quantity of vertical correction of the ram is calculated on the basis of the detected quantity of horizontal movement of the ram, and the spindle head is moved vertically, while keeping a horizontal position thereof, on the basis of the calculated quantity of vertical correction of the ram. Since a vertical deviation of the ram has a correction to its quantity of horizontal movement, the vertical deviation, or quantity of vertical correction, of the ram is obtained by detecting its quantity of horizontal movement.

Abstract: The machine tool comprises a vertical post (14) on which a head changer (19) is mounted for changing the tool head (17) provided at a head carrier (16). The head changer (19) is rotatable about a vertical axis. It carries at least one head gripper (22) which is adapted to grip from the top the tool head (17) and to rotate it from a front working position to a rear changing position. The post (14) being nonrotational (about any axis) and preferably unadjustable in height (the Y axis), is simple and low cost. The machine tool is readily adaptable to sophisticated design modifications, particularly including tool exchange in plural multi-tool tool heads and interchange with tool and/or tool head storage magazines.

Abstract: A tailstock for rotatably supporting a workpiece on a machine bed. The tailstock includes a vertical column fixed at the machine bed which has first and second regions. The second region of the column is coaxial with the first region and pivotally mounted to the first region. An offset arm extends laterally from the vertical column and carries a center for engaging the workpiece. The offset arm has an opening for accommodating the regions of the vertical column and is longitudinally displaceable thereon. The offset arm is pivotable when disposed at the second region and non-pivotable when disposed at the first region to dispose same in repeatable precision relation to the machine bed.

Abstract: This device for bending the tool holder of a folding press comprises structure for controlling the deformation of the wedge secured at either end, in the form of a hollow screw engaged in a socket rigid with the tool holder so that it can accomplish movements of translation within this socket, a member for fastening the screw to the wedge, a sprocket mounted coaxially to the screw on the screw-threaded shank thereof for causing the translation of the screw in the socket, and a single driving system for controlling the rotation of the set of sprockets acting at different thrust points disposed at spaced intervals along the wedge, this single wedge having a relatively great length and being therefore easily deformable under the control of the single control system.