Abstract: A plain bearing sleeve includes an inner diameter, a sleeve length greater than the inner diameter, an outer diameter, and a wall thickness smaller than 8% of the inner diameter. A sleeve blank includes a longitudinal axis, an outer surface, an inner surface, a first end face, a second end face opposite the first end face, and at least three threaded holes arranged on the first end face. A method for producing the plain bearing sleeve includes clamping the outer surface at the first end face for rotation, machining the inner surface to the inner diameter, fixing the first end face at the at least three threaded holes for rotation, machining the outer surface to the outer diameter, clamping the inner surface at the second end face for rotation, and cutting a ring with the first end face and the at least three threaded holes from the sleeve blank.

Abstract: An optoacoustic probe for optoacoustic imaging of a volume is provided that includes a housing extending from a distal end operable to contact the volume to a proximal end. The optoacoustic probe includes a light source configured to generate light that is transmitted along a light pathway to generate return signals when the light reacts with the volume, and a transducer assembly including a transducer configured to receive the optoacoustic return signals and an acoustic lens provided over the transducer. The optoacoustic probe also includes a steering assembly coupled within the housing and configured to steer the light pathway to generate the light along the light pathway at different scanning areas of the volume based on the return signals.

Abstract: A method to ascertain a quality of a product formed by a subtractive manufacturing device from a workpiece includes: determining a deflection/test force relation for a deflection of the device; measuring an actually exerted machining force applied by the device to the workpiece; automatically determining a machining force reference for the actually exerted machining force; automatically evaluating whether the actually exerted machining force deviates from the machining force reference. If an actually exerted machining force deviates from the machining force reference, then the method uses the deflection/test force relation to automatically determine for the actually exerted machining force, at least one correction deflection of the device and automatically creating at least one corrected drive control signal to fully or partially reduce the correction deflection.

Abstract: A method and device for milling a large-diameter aspheric surface by using a splicing method and a polishing method to solve the problems of large time consumption and serious tool wear in the machining of a meter-scale large-diameter aspheric surface are disclosed. where an aspheric surface is discretized into a series of rings with different radii, and the rings are sequentially machined via generating cutting by using an annular grinding wheel tool with an outer diameter less than ¼ of a diameter of the aspheric surface; the rings are equally spaced, there are a total of N rings, and a width of any ring is jointly determined by the Nth ring, the (N?1)th ring, positioning accuracy and a generatrix equation of the aspheric surface; and the aspheric surface is enveloped by a large number of rings. A contact area between the tool and a workpiece surface is rings.

Abstract: A control device for machine tools according to an aspect of the present disclosure controls a machine tool which cuts the workpiece by way of the cutting tool by causing the spindle and the feed axis to cooperatively act, the control device including: a feed command calculation unit which calculates a feed command for causing the feed axis to relatively move in relation to the workpiece; an oscillation phase calculation unit which calculates an oscillation phase that is a phase of oscillation to cause the feed axis to reciprocally move based on a rotation number of the spindle; an oscillation phase compensation unit which compensates the oscillation phase; an oscillation amplitude calculation unit which calculates an oscillation amplitude that is an amplitude of oscillation causing the feed axis to reciprocally move based on the feed command; an oscillation command calculation unit which calculates an oscillation command causing the feed axis to reciprocally move, based on the oscillation amplitude and the o

Abstract: A cutting tool holder according to one embodiment supports a cutting insert including a rake face, a flank face, and a cutting edge. The cutting tool holder according to one embodiment includes: a holder body having a seat face on which the cutting insert is placed; a pressing member that positions and fixes the cutting insert to the holder body; and a fixing member that fixes the pressing member to the holder body. The pressing member has: a front end portion close to the cutting edge; and a base end portion distant away from the cutting edge. The front end portion is provided with a first coolant ejection hole. A first flow path is provided inside the holder body. A coolant reservoir and a second flow path are provided inside the pressing member.

Abstract: A brake disc tool for machining a brake disc blank is provided. The brake disc tool includes a first cutting tool which is arranged to cut a first brake surface of the brake disc blank, a second cutting tool which is arranged to cut a second brake surface of the brake disc blank, a first forming tool for forming the first brake surface, a second forming tool for forming the second brake surface, and at least one infeed device for the infeed of the cutting tools and the forming tools towards one another, such that a brake disc blank arranged between the cutting tools and the forming tools is able to be machined and rolled in each case simultaneously on both of its brake surfaces.

Abstract: A method for manufacturing a sensor bearing unit includes providing a bearing having a first ring and a second ring capable of rotating concentrically relative to one another, and an impulse ring provided with a target holder secured into a groove made in a cylindrical surface of the first ring, and with a magnetic target mounted on the target holder. The method including applying on a first ring blank a heat-treatment in which the metal is hardened, hard machining the groove in the cylindrical surface of the first ring blank after the step of heat treating, and introducing and securing the target holder of the impulse ring inside the groove of the machined first ring. Also a sensor bearing unit.

Abstract: A spindle thermal error compensation method which is insensitive to the disturbance of the cooling system is provided, belonging to the technical field of error compensation in numerical control machine tools. First, the spindle model coefficient identification test, based on multi-state speed variable, is performed; after which, based on the correlation analysis between temperature and thermal error, the temperature measurement point, significantly correlated with the axial thermal error of the spindle, is determined. Next, a spindle thermal error model is established, which is insensitive to the cooling system disturbance. In addition, the coefficients in the model are identified under constraint condition, according to the nonlinear quadratic programming algorithm. Finally, based on the OPC UA communication protocol, the compensation value, as calculated by the model, is input to the numerical control system, in order to realize the compensation of the spindle thermal error.

Abstract: A control device for a machine tool and a machine tool, for which settings of the number of vibrations per rotation become easy, is provided. The control device of the machine tool controls a relative rotation between a workpiece and a cutting tool and a relative reciprocal movement between the workpiece and the cutting tool in a feed direction to perform vibration cutting to the workpiece. The control device includes a control section for controlling a spindle headstock, a first tool post, and a second tool post, the workpiece W being installed on the spindle headstock, the first tool post being provided to be reciprocally movable along the feed direction with respect to the spindle headstock and installed with a first cutting tool for cutting the workpiece, and the second tool post being provided to be reciprocally movable along the feed direction with respect to the spindle headstock independently of the first tool post and installed with a second cutting tool for cutting the workpiece.

Abstract: A method and a device for producing an optical component having at least three monolithically arranged optical functional surfaces and an optical component are disclosed.

Abstract: The use of cryogenic coolant in a machining operation in Ti, Ti-alloys or Ni-alloys together with a cutting tool of a cemented carbide substrate with a gradient surface zone with a thickness of between 50-400 ?m is provided. The cemented carbide substrate has a binder phase gradient with the lowest binder phase content in the outermost part of the gradient surface zone and the cemented carbide having graphite. The arrangement leads to a significantly prolonged tool life.

Abstract: To provide a controller for a machine tool capable of shredding chips and capable of performing machining by cutting correctly without implementation of a so-called finishing process.

Abstract: In accordance with various illustrative embodiments of the present disclosure, a rotationally symmetric surface of a workpiece is machined by a turning apparatus, wherein the workpiece is rotationally driven around a rotational axis, a cutting tool with a cutting edge positioned at the edge of a rake face is arranged relative to the workpiece, the cutting tool is brought into contact with the workpiece, and the cutting tool is advanced relative to the workpiece along a feed direction parallel to the rotational axis, the normal to the rake face being tilted relative to the feed direction, a first axis and a second axis, the first axis and the second axis are perpendicular to the feed direction and perpendicular to each other.

Abstract: A cutting tool may include a holder including a pocket, a cutting insert located at the pocket, a clamp member configured to fix the cutting insert to the pocket, and a flow path including an inflow port and an outflow port. The clamp member may include a screw and a clamp. The flow path may further include a first flow path located in the holder, a second flow path located in the clamp, and a third flow path that is a pipe connecting the first flow path and the second flow path and including a first end part located in the first flow path and a second end part located in the second flow path.

Abstract: A method for producing a sintered component includes: a compacting step of press-compacting a raw material powder containing a plurality of metal particles to form a compact; a cutting-machining step of rotating a cutting tool circumferentially having a plurality of cutting edges to cause the cutting edges to intermittently cut a surface of the compact; and a sintering step of sintering the compact after the cutting-machining step. The cutting speed of the cutting tool is 1000 m/min or more.

Abstract: The present application relates to metal cutting, and more particularly to a cutting fluid and a preparation method and an application thereof, especially the application in the processing of niobium-tungsten alloy (NB521). The preparation method of the cutting fluid is simple and requires low production cost. In the mechanical processing of niobium-tungsten alloy (NB521), the cutting fluid has good cooling performance, lubricity, load-bearing capacity, friction reduction and vibration absorption, and long service life. It also can effectively avoid built-up edges, thereby improving the service life of cutting tools and the processibility of materials. Therefore, products of good quality are produced to improve the yield, especially in the deep hole machining, and thus the cutting fluid of the present application is suitable for a wide range of applications.

Abstract: The invention relates to methods of stabilizing bone implants, including inserting a self-tapping implant having at least two helical grooves running in opposite directions around the implant.

Abstract: A manufacturing method, a manufacturing apparatus, a computer readable recording medium, and a program for manufacturing a machine component having a rotation symmetry plane are provided.

Abstract: A control apparatus of a machine tool, the control apparatus including: a numerical control unit configured to create a spindle axis command and a feed axis command according to a tapping program; a spindle axis control unit configured to control rotational operation of the spindle axis according to the spindle axis command; a rotation detector configured to detect a rotation position of the spindle axis; and a feed axis control unit configured to control feeding operation of the feed axis according to the feed axis command on the basis of the rotation position. The numerical control unit is further configured to include, in the spindle axis command, a speed command value during return that does not depend on maximum rotation speed during machining of the spindle axis and that is higher than the maximum rotation speed during machining, as a command of return operation.

Abstract: System for machining workpieces including a setting-up module and a machining module for the production of components. The setting-up module includes at least one first tool holder fixing device for fixing at least one tool holder removably, and at least one first workpiece support fixing device for fixing a workpiece support removably. The machining module includes at least one second tool holder fixing device for fixing at least one tool holder removably and at least one second workpiece support fixing device for fixing a workpiece support removably, such that the tool holder and the workpiece support can both be transferred from the setting-up module to the machining module after setting up.

Abstract: A method for cutting an inner circumferential surface of a rotating hollow cylindrical workpiece includes: holding the workpiece with a chucking device such that a side surface of the workpiece on a first side in an axial direction of the workpiece is in contact with a contact surface of the chucking device; setting an intersection angle between a rotational center line of the workpiece and an imaginary straight line to an angle smaller than 45 degrees, the straight line being parallel to an axis line of a button tip and intersecting with the rotational center line; and setting a feed direction of the button tip to the inner circumferential surface to a direction from a second side in the axial direction of the workpiece toward the first side in the axial direction thereof, and cutting the inner circumferential surface by use of the button tip rotating about the axis line.

Abstract: Technology for milling selected portions of a workpiece by a cutting tool of a numerical control machine is described. The described technology provides methods and apparatuses for milling areas of a part so that more aggressive machining parameters can be used in the toolpath, thereby resulting in reduced machining time and load. The technology creates a series of toolpath contours where arcs in the toolpath contours are non-concentric with arcs in other toolpath contours. The selected portions of the workpiece are milled by moving the cutting tool in accordance with the toolpath.

Abstract: A numerical controller has a tool retraction function for retracting a tool so as not to damage the machined surface of a workpiece when machining of the workpiece by a machine tool is interrupted. The numerical controller identifies a machining method for the machining to be interrupted when a command to interrupt the machining is detected, determines the direction of the retraction of the tool, based on the identified machining method and the feed direction and the rotation direction of a spindle in the machining to be interrupted, and generates a movement path of the tool in the determined retraction direction.

Abstract: An oscillation permission/prohibition notification part of a control device notifies an oscillation command generation part of generation permission of the oscillation command when a position command value has not reached within a predetermined range of a machining end point of a workpiece, and notifies the oscillation command generation part of generation prohibition when the position command value has reached within the predetermined range. A control part includes a learning controller and a learning determination part. The learning determination part determines whether the oscillation command generation part has been notified of generation permission or generation prohibition of the oscillation command, turns learning control on when notification of generation permission of the oscillation command has been received, and sets the oscillation command to zero and turns off learning control when notification of generation prohibition of the oscillation command has been received.

Abstract: Methods and devices for computer-assisted milling of a pocket region of a workpiece by computing a blend arc radius, where the blend arc radius is based on a maximal variation of a Tool Engagement Angle (TEA), and smoothing at least one offset, where the smoothing is based on the computed blend arc radius and/or a prior computed blend arc radius with a stepover.

Abstract: An angle grinder includes a motor including a rotor and windings, a power supply for supplying power to the motor, a main switch for turning on/off an electrical connection between the windings of the motor and the power supply, an output shaft driven by the rotor to rotate, a rotor brake circuit for slowing down the rotor of the motor when the windings are short circuited or reverse connected, an output shaft brake circuit for producing a magnetic field to slow down the output shaft and a controller for detecting whether the rotor brake circuit short circuits or reverse connects with the windings. When the windings are short circuited or reverse connected for a time which reaches a preset value, the output shaft brake circuit produces the magnetic field to slow down the output shaft.

Abstract: A tool body having an insert seat and a cutting tool which allow a cutting insert to be stably held are provided. A tool body according to the present invention is a tool body having an insert seat for mounting a cutting insert on the tool body, wherein the insert seat has a base surface and a side wall surface which extends so as to intersect with the base surface. The base surface has a contact surface and a contact projected part which come into contact with the cutting insert. A contact part of the contact surface is comprised of a surface, and a contact part of the contact projected part has a linear shape or a point shape.

Abstract: In a machine tool and a control apparatus thereof, a repetitive movement unit is configured so that the cutting tool performs one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool and so that a rotation angle of the relative rotation between the workpiece and the cutting tool during relative movement at a second speed is smaller than a rotation angle of the relative rotation during relative movement at a first speed in one repetitive movement. This configuration limits degradation of machining efficiency when the cutting tool machines the workpiece by performing one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool.

Abstract: A method and apparatus for treating a circumferential edge of a part are described. The method includes the steps of (1) mapping the circumferential edge of the part with a measuring device, either directly or differentially from a known shape profile; and (2) using the measured data to more accurately follow the circumferential edge of the part during subsequent treatment processing steps, thereby improving the accuracy of the treatment process and compared with a non-mapped treatment process.

Abstract: A headstock assembly for a machine tool includes a mount having a female threaded bore, a headstock mounted slidably relative to the machine base, a drive member mounted on the headstock, a spindle, and a spindle extension. The spindle has an intermediate segment disposed in a chamber of the headstock and coupled to be driven by the drive member so as to permit the spindle to rotate about a spindle axis. The spindle extension is coupled to be rotatable with the spindle, and has a male threaded segment configured to be in threaded engagement with the female threaded bore so as to permit the headstock to be linearly moved relative to the mount.

Abstract: A high-speed precision interrupted ultrasonic vibration cutting method includes steps of: (1) installing an ultrasonic vibration apparatus on a machine tool, and stimulating a cutting tool to generate a transverse vibration, so as to realize varieties of machining processes; (2) realizing an interrupted cutting process by setting cutting parameters and vibration parameters to satisfy an interrupted cutting conditions; and (3) turning on the ultrasonic vibration apparatus and the machine tool, and starting a high-speed precision interrupted ultrasonic vibration cutting process. High-speed precision interrupted ultrasonic vibration cutting is able to be realized through the above steps during machining of difficult-to-machine materials in aviation and aerospace fields.

Abstract: Technology for milling selected portions of a workpiece by a cutting tool of a numerical control machine is described. The described technology provides methods and apparatuses for milling areas of a part so that more aggressive machining parameters can be used in the toolpath, thereby resulting in reduced machining time and load. The technology creates a series of toolpath contours where arcs in the toolpath contours are non-concentric with arcs in other toolpath contours. The selected portions of the workpiece are milled by moving the cutting tool in accordance with the toolpath.

Abstract: A turning device has two turning stations, each with a rotatable work piece spindle to hold a lens blank and each with a turning tool for the machining of a lens blank. A fabrication mechanism for the manufacturing of eyeglass lenses from lens blanks includes a milling device and the turning device, wherein the milling device has at least one milling station with a work piece holder to hold a lens blank and a milling tool for the machining of the lens blank. A loading device is configured to remove lens blanks from the milling device and load them into the turning device. A method for operating such a fabrication mechanism includes simultaneous machining of a third lens blank with the milling tool and a first and a second lens blank with the turning tools.

Abstract: Disclosed is a numerical controller that has a cutting in/out motion inserting function and configured to control a machine tool that performs lathe-turning machining in which a cutting tool moves in contact with a rotating workpiece. The numerical controller includes a cutting in/out motion inserting unit that generates a program to perform cutting in/out motion, based on operation conditions analyzed by a cutting in/out motion operation conditions analysis unit and inserts the generated program of performing the cutting in/out motion to a program to perform the lathe-turning machining.

Abstract: A rotary indexing machine that includes a machining device, that has at least two machining stations and at least one pre-turn station, which are arranged at least substantially on a shared circumference in respectively a circle segment, and a motor unit, that is provided to drive the pre-turn station. The motor unit is arranged at least largely within the circle segment of the pre-turn station.

Abstract: Processes by which bulk forms can be produced in a single continuous operation, as opposed to multi-stage deformation processes that involve a series of separate and discrete deformation operations or stages. Such processes generally entail deforming a solid body using a large-strain extrusion machining technique and deformation conditions that obtain a predetermined crystallographic texture in the continuous bulk form that differs from the crystallographic texture of the solid body.

Abstract: Embodiments of systems, methods, and computer-readable media for machining materials are disclosed. For example, one embodiment of the present invention includes a method for machining a feature on a work piece (100) along a curving tool path having the steps of controlling a relative translational movement between a tool table and the work piece (100) along the curving tool path and controlling a corresponding angle of rotation of the tool table with respect to the work piece (100) to maintain a substantially constant angle between the tool table and the corresponding relative translational movement between the tool table and the work piece (100) along the curving tool path. In another embodiment, a computer-readable media includes code for a carrying out such a method.

Abstract: A cutting insert incorporates a pre-formed discrete cutting tip which wraps around a curved cutting corner of the insert. The cutting tip includes a top layer and a bottom layer made of a relatively harder material than the top layer. In one embodiment, the bottom layer is made of polycrystalline diamond (PCD) or a polycrystalline cubic boron nitride (CBN) material and the top layer is made of cemented carbide. The cutting insert may further incorporate a chip control structure formed in the cutting tip including a plurality of facets formed on each side of a centerline for providing chip control during a cutting operation. The chip control structure can be formed in a two-step process to expose a portion of the bottom layer. The discrete cutting tip can be brazed to the cutting insert prior to forming the chip control structure.

Abstract: An apparatus for machining a workpiece with a tool has a columnar housing having an upright front face and a pair of upright and parallel side walls extending horizontally rearward from the front face, a carriage movable at least vertically on the front face carries a first holder for the workpiece or the tool. A U-shaped frame juxtaposed with the housing front face has two rigid arms each extending rearward adjacent the housing side walls with interfitting guides between each of the arms and the respective side wall enabling horizontal movement of the frame toward and away from the front face. A second holder on the frame and in front of the front wall holds the tool or the workpiece and is engageable with the workpiece or the tool, respectively, in the first holder.

Abstract: The present invention provides a spraying device for use in machining center, which is installed at the front flange of a spindle in a machining center and includes: a fastening member having the inner side and the outer side respectively formed with an inner connecting edge and an outer connecting edge; and a spray member respectively and axially extended with an inner flange and an outer flange, thereby defining an accommodation space, so a coolant can pass at least one water inlet for entering the accommodation space; wherein the peripheral surface of the spray member is formed with at least one row of cooling array composed of plural primary ejecting holes having the inclined angles determined according to the cutting range of the tool, so the coolant ejected by the primary ejecting holes are able to be gathered within the cutting range of the tool.

Abstract: A center hole machining method includes first to fifth steps. The first step includes obtaining outer peripheral shape data of a plurality of portions of the shaft blank in an axial direction. The second step includes obtaining a center axis by comparing measured data of the portions of the shaft blank with design data. The third step includes calculating a minimum distance from the center axis to the outer periphery in each of the portions of the shaft blank. The fourth step includes shifting the center axis in a direction of making the minimum distance greater than the machining dimension and repeatedly executing the third step when the minimum distance is less than or equal to the machining dimension. The fifth step includes boring the center hole in an end surface of the shaft blank at a position arranged on a line extended from the center axis.

Abstract: Disclosed are various embodiments for attaching an electronic identification device to bits, such as drill bits and driver bits. A bit identification assembly is configured to attach to a bit. The bit identification assembly may include a core having a bit receptacle where a bit is retained. An electronic identification device may be attached to the core to facilitate identifying and tracking the bit to which the bit identification assembly is attached.

Abstract: A system for automatic chip breaking used in a cutting machine is illustrated, wherein the cutting machine has a cutter and a spindle actuator. According to control information, the spindle actuator controls the cutter to move along with a first axis to cut a workpiece, and the chips are produced. The system for automatic chip breaking includes a signal collection device, a controller, and an actuator. The signal collection device electrically coupled to the cutting machine collects the control information. The controller electrically coupled to the signal capturing device triggers a control signal according to the control information. The actuator installed between the spindle actuator and the cutter is electrically coupled to the controller, and controls the cutter to vibrate along with a second axis according to the control signal, wherein the second axis and the first axis have a specific angle.

Abstract: At a contact step in a tool radius adjusting method, a reference portion of a movable body provided radially movably on a housing of a boring tool and a position adjusting reference member fixed on a machine tool are brought into contact by sliding the movable body relative to the housing so that the position of a cutting blade comes to a predetermined position in a direction to go away from a rotational axis. Then, at an adjusting step, the position of the cutting blade relative to the rotational axis is adjusted by changing the relative position between a tool spindle holding the boring tool and the position adjusting reference member in a direction to come close to each other by drive mechanisms of the machine tool used for positioning a spindle head with the tool spindle relative to a workpiece in machining the workpiece with the cutting blade.

Abstract: A device and a method for machining of a flat side of an optical workpiece. The device has two flat guides and a side guide for fluidic guidance of a spindle unit and/or a slide. A linear drive with an assigned tool is located on a slide with a turntable. Highly accurate machining is enabled.

Abstract: A method removes a fuel injector pole piece from bar stock and provides a cutoff tool having a first cutting surface and a second cutting surface separate from the first cutting surface. The pole piece and bar stock are caused to rotate about a longitudinal axis. The tool is advanced with respect to the pole piece so that the first cutting surface severs the pole piece from the bar stock and defines an unfinished end surface of the pole piece, with a certain cutting force being exerted on the tool. The tool is further advanced with respect to the pole piece so that the second cutting surface removes material from the unfinished end surface to define a finished end surface of the pole piece, with a cutting force on the tool being substantially less than the certain cutting force.

Abstract: In an ultrasound-assisted method, in each of at least two sonotrode arms (8, 9) of a sonotrode (7) that is fixed in a protruding manner, said sonotrode arms being connected to each other by means of a respective joint (10) in each case, a respective ultrasonic wave that is transverse to the protrusion direction and that oscillates in a resonance mode is produced, wherein ultrasonic waves superposed in the at least one joint (10) and oscillating in the sonotrode arms (8, 9) of the joint (10) oscillate at a phase offset from each other, and the oscillation planes of the superposed ultrasonic waves are parallel to each other.

Abstract: The invention relates a method for reducing the eccentricity of the inner and outer surface (7, 9) of a hollow workpiece (i), for example a hollow shaft, rotatably clamped in machine tool (2), in which in one clamping a plurality of measurement data depending on the contour of the inner surface (7) of the hollow workpiece (i) are recorded, for example with the aid of ultrasound, using the recorded measurement data a desired surface (13) is calculated for at least a part of the outer surface (9), which has a reduced eccentricity with respect to the inner surface (7) and in a further step the rotating workpiece (i) is at least partially machined at the outer surface (9) thereof according to the desired surface (13).

Abstract: A cutting insert according to an embodiment of the present invention includes an upper surface; a lower surface; a side surface located between the upper surface and the lower surface; at least one concave part extending in a thickness direction in the side surface, and having one end thereof located at the upper surface; and a cutting edge which is located at an intersection region of the upper surface and the side surface, and is divided into a plurality of divided cutting edges with the at least one concave part interposed therebetween. The upper surface includes a first raised part located inwardly of the at least one concave part, and a plurality of second raised parts respectively located inwardly of the plurality of divided cutting edges. The plurality of the second raised parts are located inward compared to one end of the first raised part close to the cutting edge in a top view.