Abstract: A 3D printer includes a build plate providing a surface on which an object is printed. Prior to printing, a sheet is fixed to the surface of the build plate. The sheet is composed of a material that adheres to a binder component of the feedstock used to print the object. During printing, the first layer of the printed object forms a bond with the sheet, which secures the location of the first layer and resists movement of the object during printing. Following printing and the object gaining sufficient rigidity, the object and sheet can be removed together from the printer. The sheet may then be peeled from the object, and the object can undergo debinding and/or sintering to create a finished object.

Abstract: Additive manufacturing of an object includes dispensing a plurality of successive layers of powder over a top surface of a platform, fusing an object region in each of the plurality of successive layers to form the object, and fusing a brace region in a particular layer from the plurality of layers to form a brace structure to inhibit lateral motion of the powder. The brace structure is spaced apart from the particular object region by a gap of unfused powder.

Abstract: A three-dimensional forming apparatus includes: a stage; a material supply mechanism that supplies a sinterable material in which metal powder and a binder are contained to a stage; an energy radiation mechanism that supplies energy capable of sintering the dry sinterable material; and a driving mechanism that is able to three-dimensionally move the material supply mechanism and the energy radiation mechanism relative to the stage. The material supply mechanism includes a material ejection unit supplying a predetermined amount of the sinterable material to the stage. The energy radiation mechanism includes an energy radiation unit outputting the energy. The material ejection unit and the energy radiation unit are held in one holding mechanism.

Abstract: A metal 3-D printer includes a powder layer formation device having a blade for planarizing metal powder, a table driving device lowering a table by a predetermined lowering distance in anticipation of a formation of a powder layer, a laser irradiating device irradiating a laser beam at the powder layer to form a sintered layer having a predetermined upper surface region, a numerical control apparatus controlling the powder layer formation device, the table driving device, the laser irradiating device and a machining apparatus. When the blade collides with an obstacle formed on an upper most sintered layer, an end mill is lowered according to a predetermined lowering distance such that a lower end of the end mill is lower than an upper surface of the powder layer, and moves the end mill across a predetermined upper surface region of the uppermost sintered layer to remove the obstacle.

Abstract: A method of adjusting a stamping die is provided. The method includes providing a two-sided stamping die configured to form parts from sheet metal blanks according to a desired geometry upon closing the die, adjusting the desired geometry of the part, and repeatedly depositing layer upon layer of material onto a first side of the die in a stacked configuration to modify the geometry of the first side of the die such that the die forms parts from sheet metal blanks according to the adjusted desired geometry.

Abstract: Methods of manufacturing or repairing a turbine blade or vane are described. The airfoil portions of these turbine components are typically manufactured by casting in a ceramic mold, and a surface made up of the cast airfoil and at the least the ceramic core serves as a build surface for a subsequent process of additively manufacturing the tip portions. The build surface is created by removing a top portion of the airfoil and the core, or by placing an ultra-thin shim on top of the airfoil and the core. The overhang projected by the shim is subsequently removed. These methods are not limited to turbine engine applications, but can be applied to any metallic object that can benefit from casting and additive manufacturing processes. The present disclosure also relates to finished and intermediate products prepared by these methods.

Abstract: Invention provides a one step process for the preparation of metal nanoparticles which are stable at room temperature under normal storage condition for more than 6 months, retain their colloidal and dispersive nature at neutral, acidic (pH <7) and basic (pH >7) pH conditions and can maintain their stability and colloidal nature at low (while frozen), high temperatures and pressure, from water soluble metal chlorides and hydrides.

Abstract: A method for producing copper particles includes a preparation step and a heating step. In the preparation step, a copper compound, a salt of a main group metal, and a polyhydric alcohol are prepared. In the heating step, a mixture of the copper compound, the salt of the main group metal, and the polyhydric alcohol is heated. Preferably, the main group metal is at least one selected from the group consisting of lithium, beryllium, sodium, magnesium, aluminum, potassium, calcium, zinc, gallium, germanium, rubidium, strontium, cadmium, indium, tin, antimony, cesium, and barium.

Abstract: A re-facing apparatus for pipe threaded connections having independent machining stations for pin-end (male) and box-end (female) threaded connections. Among other benefits, the machining stations can be used to restore torque shoulders by machining a face of each shoulder using custom spindle and cross slides. The pipe connection re-facing apparatus can be set up over existing pipe racks and allows pipe sections to be rolled through for processing. For example, the apparatus of the present invention can be installed and utilized in proximity to a pipe storage and inspection facility, such that out-of-specification pipe connections can be re-faced without incurring significant transportation and/or machine shop expenses.

Abstract: An adjustable pipe center; the lathe-center may be useful for supporting the end of a rotating workpiece having a hollow along an axis upon which the workpiece is rotating. The adjustable pipe center includes a shaft, a center-head having keyways, a plurality of bearing-fins, and a plurality of power-screws. The center-head is fixed to the shaft and is able to fit within the hollow of the workpiece. The plurality of bearing-fins is able to fit and slide within the keyways, with each having a bearing-surface for contacting the workpiece. The bearing-surface is disposed at an angle to the shaft-axis between zero and ninety degrees. The bearing-fins may be translated, functioning as an inclined plane to displace a workpiece resting against it. When the bearing-fins are collectively translated as desired, it may laterally adjust the position of the workpiece-axis relative to the shaft-axis.

Abstract: In a hard coating layer that contains at least any of a layer of a complex nitride or a complex carbonitride (composition formula: (Ti1-xAlx)(CyN1-y)) of chemically-vapor-deposited Ti and Al, a layer of a complex nitride or a complex carbonitride (composition formula: (Ti1-?-?Al?Mr?)(C?Ni1-?)) of Ti, Al, and Me, and a layer of a complex nitride or a complex carbonitride (composition formula: (Cr1-pAlp)(CqN1-q) of Cr and Al in a surface-coated cutting tool, some crystal grains that form the layer of a complex nitride or a complex carbonitride have cubic structures, and a predetermined average crystal grain misorientation and inclined angle frequency distribution are present in the crystal grains that have cubic structures.

Abstract: A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, the coating layer including at least one ?-type aluminum oxide layer, wherein, in the ?-type aluminum oxide layer, a texture coefficient TC (2,1,10) of a (2,1,10) plane is 1.4 or more. TC ? ( 2 , 1 , 10 ) = I ? ( 2 , 1 , 10 ) I 0 ? ( 2 , 1 , 10 ) ? { 1 8 ? ? I ? ( h , k , l ) I 0 ? ( h , k , l ) } - 1 ( 1 ) (In formula (1), I (h,k,l) denotes a peak intensity for an (h,k,l) plane in X-ray diffraction of the ?-type aluminum oxide layer, I0 (h,k,l) denotes a standard diffraction intensity for an (h,k,l) plane which is indicated on a JCPDS Card No. 10-0173 for ?-type aluminum oxide, and (h,k,l) refers to eight crystal planes of (0,1,2), (1,0,4), (1,1,0), (1,1,3), (0,2,4), (1,1,6), (2,1,4) and (2,1,10).

Abstract: An object is to prolong the life of a cubic boron nitride cutting tool used for cutting a heat-resistant alloy. A cubic boron nitride cutting tool includes an edge tip made of a sintered cubic boron nitride compact including cubic boron nitride particles; and a base metal that holds the edge tip at a corner portion of the base metal, wherein a cutting edge formed on the edge tip of the tool has a positive rake angle.

Abstract: An edge break apparatus including a frame having a first workpiece interface surface, a second workpiece interface surface arranged relative to the first workpiece interface surface so as to form a predetermined angle between the first workpiece surface and the second workpiece surface, and a first aperture extending through the frame so as to intersect the predetermined angle, and an edge break member extending through and interfaced with the first aperture so as to adjustably define a cutting depth of the edge break member relative to an apex of the predetermined angle.

Abstract: A milling tool for cyclo-palloid toothing has a holder and multiple first cutting plates. and includes a clamping portion for clamping the holder and a holder head, which projects radially compared to the clamping portion in the front end and on which there are multiple first cutting plate receptacles. The first cutting plates are fastened in the first cutting plate receptacles, and project radially outward, wherein the radially outermost points of the first cutting plates lie in each case on a common circle, the center point of which lies on the center axis of the holder. The first cutting plates are arranged at an angle to an orthogonal plane which is orthogonal to the holder center axis. Multiple first partly conical surfaces are provided on a top side of the holder head. Multiple second partly conical surfaces are provided on an end side of the holder head.

Abstract: A cutting insert mounted on a rotating tool including a body that rotates about a predetermined rotational axis. The cutting insert includes an upper surface, a lower surface and a peripheral side surface. The cutting insert further includes an inner cutting edge and a corner cutting edge. A top part, which has the maximum distance from the lower surface, is located on the corner cutting edge.

Abstract: A wood cutting band saw blade includes a plurality of teeth extending upward from a continuous band portion. Each tooth includes a cutting edge and a back angle edge defining a tip, and a gullet. The gullet includes a forward edge extending from the back angle edge to a lowest point of the gullet, and a rearward edge extending upward from the lowest point to a cutting edge of an adjacent tooth. In some embodiments, the lowest point of the gullet is closer to the tip than to a tip of the adjacent tooth.

Abstract: An operator operates a throttle lever and by maximizing the extent of said operation, the drive state is initiated, and the crank shaft rotation rate R increases and reaches the maximal value (RC) thereof. Subsequently, the operator operates the dressing operation lever so as to be in a second state at elapsed time (t0) while keeping the extent of the throttle lever operation maximized. Because a microswitch is turned off, the crank shaft rotation rate (R) is controlled in a range of R1<R<R2. By placing the saw chain in contact with a grindstone fixed to the dressing operation lever simultaneously with said action, dressing work is performed. After the microswitch is turned off at elapsed time (t0), the output of an ignition coil is controlled cyclically by a control unit at a cycle (T1+T2) so as to be on (ignition) during period (T1) and off (flame off) during period (T2).

Abstract: A numerical control apparatus includes: a drive unit controlling a main shaft rotating a workpiece, a first drive shaft feeding a cutting tool relatively to the workpiece along a perpendicular direction to a lead direction of a thread, and a second drive shaft feeding the cutting tool relatively to the workpiece along the lead direction; and a vibration unit superimposing, on movement of the first drive shaft, vibration having a period having a predetermined ratio with a rotation period of the main shaft, and forms a thread on the workpiece by moving the cutting tool and the workpiece relative to each other and performing cut processes on the workpiece. The numerical control apparatus includes a thread-cutting vibration adjustment unit controlling the drive unit to shift phase of the vibration with respect to phase of the main shaft by a predetermined vibration phase shift amount every time in the cut processes.

Abstract: A thermal managing electrical connection tape includes a carrier film and a composition including solder powder, with the composition being applied to the carrier film. The composition includes a soldering flux having the solder powder disposed therein. The composition contains between about 50 wt % and about 70 wt % soldering flux. The composition further contains between about 30 wt % and about 50 wt % solder powder. A method of fabricating a thermal managing electrical connection tape includes providing a composition including at least one of a soldering flux and epoxy and/or acrylic, adding a solder powder to the composition, casting the composition on a carrier film, drying the carrier film in a drying furnace to form a dried tape, and cutting the dried tape to a desired width to form a thermal managing electrical connection tape.

Abstract: System (10) and methods (1000) for structural braze repair of high gamma prime nickel base gas turbine components (1). The system may include a controller (200) operably connected to a heating system (100), e.g., a vacuum furnace, for controlling heat temperatures of the furnace for a specified or predetermined time period. A damaged component is placed in the furnace and heated to a first temperature, which is held for the specified time period before being cooled to about room temperature. The component is then heated to a second temperature higher than the first temperature, which is held for a second time period before being cooled again to about room temperature. After cooling the component may be braze repaired at a third temperature equal to or higher than the previous temperatures for a third time period.

Abstract: An arc welder alternately repeats a short circuit period in which a wire and a welding object are short-circuited and an arc period in which an arc occurs between the wire and the welding object. The arc welder includes a welding output section, a joint type setting section, a storage section, and a waveform parameter determining section. The welding output section performs welding output, and the joint type setting section sets a joint type. The storage section stores a plurality of combinations of joint types and waveform parameters. The waveform parameter determining section determines a waveform parameter based on the joint type set by the joint type setting section and the plurality of combinations. The welding output section performs welding output based on the waveform parameter determined by the waveform parameter determining section. Thus, vaporized zinc is easily released and sufficient welding is performed.

Abstract: Automatically identifying interchangeable torch components, such as consumables, for welding and cutting torches includes adding one or more passive markings to a surface of an interchangeable torch component. Then, automatic identification can be effectuated by a torch assembly including a torch body and one or more imaging devices or a system including the torch assembly and a power supply. The torch body has an operative end configured to removably receive one or more interchangeable torch components including one or more passive markings. The one or more imaging devices are positioned to optically acquire an image of or image data representative of the one or more passive markings included on the one or more interchangeable torch components so that the one or more interchangeable torch components can be automatically identified based on the one or more passive markings. Consequently, various components can be reliably and consistently identified.

Abstract: A method and apparatus for providing welding-type power includes receiving an input that may be either a single or a three phase input voltage. Three power modules, each having a single phase boost power circuit, and an output circuit process the input power. A weld output circuit receives and combines the outputs of the three power modules. An input power distribution module connects the three power modules such that each receives a unique single phase power signal. A controller controls the three power modules and the input power distribution module.

Abstract: A method of welding a superalloy component includes the following sequential steps. A welding step for welding a cavity using a filler metal in an inert atmosphere, where the cavity is located in the component. A covering step for covering the filler metal and a portion of the component with a weld filler layer in the inert atmosphere. The weld filler layer has a greater ductility than material comprising the component and/or material comprising the filler metal. A second covering step for covering the weld filler layer with a braze material, and subsequently performing a brazing operation. A heat treating step heat treats the component.

Abstract: A twin wire welding apparatus including a first contact tube for guiding a first consumable electrode toward a weld puddle and transferring welding current to the first consumable electrode, a second contact tube for guiding a second consumable electrode toward said weld puddle and transferring welding current to the second consumable electrode, and a single power source connected to said first and second contact tubes for providing the same potential to said two consumable electrodes, and a method for operating such an apparatus.

Abstract: A different material welded joint in which a first member made of a first material and a second member made of a second material having a melting point lower than that of the first material are joined to each other by welded parts, wherein the first member has a plurality of through-holes and a filler material made of the second material is filled in the plurality of through-holes, and wherein an interval between the through-holes is made wider and/or an area of the through-hole is made smaller at a welding end-side than at a welding start-side with respect to progress of welding.

Abstract: A resin insulation guide is used in a plasma torch including an electrode and a nozzle into which the electrode is inserted. The insulation guide is used to couple the electrode and the nozzle, and includes a first internal circumferential surface formed on an inside of the insulation guide, a second internal circumferential surface formed on the inside of the insulation guide, a communication channel, and a heat resistant coating formed on the first internal circumferential surface. The second internal circumferential surface has an inner diameter smaller than an inner diameter of the first internal circumferential surface. The communication channel communicates a space inside the first internal circumferential surface to an outside of the insulation guide, and extends in a direction inclined with respect to an axial direction of the insulation guide.

Abstract: The resistance spot welding method includes performing actual welding to squeeze, by a pair of electrodes (14), a sheet combination with a sheet thickness ratio of more than 3 in which a thin sheet (11) is overlapped on at least one face of two or more overlapping thick sheets (12, 13), and passing a current while applying an electrode force to join the sheet combination, wherein in the actual welding, a pattern of the current and the electrode force is divided into two or more steps including a first step and a second step to perform welding, and an electrode force F1 in the first step and an electrode force F2 in the second step satisfy a relationship F1>F2.

Abstract: A welding gun is incorporated into a unidirectional welding system, where the unidirectional welding system includes: the welding gun performing welding when a set pressing force is applied; a power portion configured to generate power to be applied to the welding gun; a power connecting portion having one end portion connected to the power portion through a power wire and an opposite end portion engaged with the welding gun; and a power switch provided at the power connecting portion to selectively apply the power generated from the power portion to the welding gun.

Abstract: A method of resistance spot welding an aluminum workpiece and an adjacent overlapping steel workpiece is disclosed in which a source of a reactive metal in a diffusible state is located along a faying interface of an aluminum workpiece and an adjacent overlapping steel workpiece. The source of the reactive metal in a diffusible state may take on a variety of forms including (1) a composite adhesive layer that includes reactive particles dispersed throughout a structural thermosetting adhesive matrix or (1) a reactive alloy layer that confronts and is in proximate contact with a faying surface of the aluminum workpiece. Once the source of a reactive material in a diffusible state is in place and the workpiece stack-up is assembled, an electrical current is passed through the workpiece stack-up and between a set of opposed welding electrodes at a weld zone to ultimately produce a weld joint.

Abstract: A resistance spot welding method of squeezing a predetermined sheet combination by a pair of electrodes and passing a current while applying an electrode force to join the sheet combination includes: performing test welding; and performing actual welding after the test welding, wherein in each of the test welding and the actual welding, a current pattern is divided into two or more steps including a first current passage step and a second current passage step subsequent to the first current passage step, and, in the actual welding, a current that causes no expulsion is selected to perform welding by constant current control in the first current passage step, and adaptive control welding is performed from the subsequent second current passage step onward.

Abstract: A welding electrode unit includes a repositioning device that is movable. The repositioning device includes an energy storage device by way of which a welding electrode is connected directly or indirectly with the energy storage device can have a force applied to it for the purpose of a repositioning movement. The repositioning device is movable into a welding position by way of a forward movement and can be locked in the welding position.

Abstract: The present disclosure provides a rotary friction welding process including: providing an outer axisymmetric workpiece having a front first annular weld surface at a radially inward extent and a rear first annular weld surface at a radially inward extent; providing a front inner axisymmetric workpiece, the front inner workpiece having a front second annular weld surface at a radially outward extent of the front inner workpiece; providing a rear inner axisymmetric workpiece, the rear inner workpiece having a rear second annular weld surface at a radially outward extent of the rear inner workpiece; and rotary welding the workpieces together.

Abstract: A hexagonal single crystal wafer is produced from a hexagonal single crystal ingot. A wafer producing method includes a separation start point forming step of applying a laser beam to the ingot to form a modified layer parallel to the upper surface of the ingot and cracks extending from the modified layer, thus forming a separation start point. The focal point of the laser beam is relatively moved in a first direction perpendicular to a second direction where a c-axis in the ingot is inclined by an off angle with respect to a normal to the upper surface. The off angle is formed between the upper surface and a c-plane perpendicular to the c-axis, thereby linearly forming the modified layer extending in the first direction. The laser beam is applied to the ingot with the direction of the polarization plane of the laser beam set to the first direction.

Abstract: Devices and methods comprise at least one gauge for inspecting weld seams comprising a plurality of cutouts: a square cutout, a rectangular cutout, a concave cutout with a protuberance; and a straight edge ending with a protruding part. The devices and methods make it possible to inspect the compliance of a weld bead with various quality standards, without taking measurements, or referring to said standards.

Abstract: Optical arrangements for processing a workpiece include a fiber laser arrangement for emitting laser radiation, a fiber arrangement directly coupled to the fiber laser arrangement and configured to guide the laser radiation in a direction to the workpiece to be processed, the fiber arrangement including a transport fiber having a fiber core and at least one fiber cladding surrounding the fiber core, and at least one coupling device for coupling a portion of the laser radiation guided in the fiber arrangement into at least one fiber cladding of the transport fiber. The coupling device has a spectral bandwidth of at least the same magnitude as a spectral bandwidth of the laser radiation. The fiber laser arrangement is configured to change a beam profile of the guided laser radiation to shift the spectral bandwidth of the laser radiation relative to the spectral bandwidth of the coupling device.

Abstract: An apparatus (10) for producing three-dimensional work pieces comprises a carrier (16), a powder application device (14) for applying a raw material powder onto the carrier (16), an irradiation device (18) selectively irradiating electromagnetic or particle radiation onto the raw material powder applied onto the carrier (16), and a control unit (38) which is adapted to control the operation of the powder application device (14) and the irradiation device (18) in dependence of the crystallization behavior of the raw material powder, in order to tailor the microstructure of a work piece made of said raw material powder by a additive layer construction method.

Abstract: A laser processing method for a sapphire includes: acquiring an image of the sapphire during processing; performing an edge detection to the image to acquire a coordinate of a crack; determining an offset parameter according to the coordinate of the crack; adjusting a laser processing position according to the offset parameter; and further processing the sapphire in accordance with the adjusted laser processing position.

Abstract: A bonding member that includes a base material that has a spiral shape when viewing a cross section thereof orthogonal to a longitudinal direction thereof, and contains a low melting point metal; and a coating film in a gap between opposed surfaces of the base material when the base material is in the spiral shape. The coating film contains metal particles of a high melting point metal that forms an intermetallic compound having a melting point higher than that of the low melting point metal by reaction of the high melting point metal with a melt of the low melting point metal. The low melting point metal is, for example, Sn or a Sn alloy. The high melting point metal is, for example, a Cu—Ni alloy, a Cu—Mn alloy, a Cu—Cr alloy, or a Cu—Al alloy.

Abstract: A bonding member having a container between a first foil and a second foil. The container includes metal particles having a melting point higher than a melting point of the first foil and a melting point of the second foil, a film material in which the metal particles are dispersed, and intermetallic compounds formed by a reaction between the first foil or the second foil and the metal particles. The first foil and the metal particles are bonded with the intermetallic compound interposed therebetween, and the second foil and the metal particles are bonded with the intermetallic compound interposed therebetween.

Abstract: A solder alloy includes Sn, optional Ag, Cu, and Al wherein the solder alloy composition together with the solder alloy superheat temperature and rapid cooling rate from the superheat temperature are controlled to provide a dispersion of fine hard Cu—Al intermetallic particles in an as-solidified solder alloy microstructure wherein the particles are retained even after multiple solder reflow cycles often used in modern electronic assembly procedures to provide a particle strengthening to the solder joint microstructure as well as exert a grain refining effect on the solder joint microstructure, providing a strong, impact- and thermal aging-resistant solder joint that has beneficial microstructural features and is substantially devoid of Ag3Sn blades.

Abstract: Provided is an aluminum alloy clad material including an aluminum alloy core material and a first brazing filler metal that is clad on one surface or both surfaces of the core material, wherein the core material and the first brazing filler metal each include an aluminum alloy having a predetermined composition, the existence density of Al—Mn based intermetallic compounds having a circle-equivalent diameter of at least 0.1 ?m in the first brazing filler metal before brazing heating is at least 1.0×105 pieces/mm2, and the existence density of Al—Mn based intermetallic compounds having a circle-equivalent diameter of at least 2 ?m in the first brazing filler metal after brazing heating is at least 300 pieces/mm2. Further provided are a method for producing the aluminum alloy clad material and a heat exchanger employing the aluminum alloy clad material.

Abstract: The present disclosure relates to a method which uses welding in order to join a FeCrAl alloy to a FeNiCr alloy by using a specific filler metal. The present disclosure also relates to a product obtained thereof. Further, the present disclosure relates to the use of the method, especially in high temperature applications.

Abstract: Method for repairing the teeth of a toothed ring gear, the method using a removable machining device, including a frame and a part moving with respect to the frame, supporting a cutting member, the method including: attaching the machining device to the toothed ring gear by tightening the machining device onto the ring gear in an attachment position on the ring gear with respect to the tooth to be machined; machining the tooth in an automated manner by control of the cutting organ following predetermined machining operations, in which the machining device is moved from an attachment position on the toothed ring gear corresponding to the previously machined tooth, to an attachment position of a neighboring tooth to be machined, while the toothed ring gear is stationary, the machining device being suspended and held by at least one tensioned cable connected to the frame of the rotating machine.

Abstract: The toggle lever clamp has a clamp housing coupled with a cylinder assembly. A piston assembly is movable within the cylinder assembly. A rod is coupled with the piston assembly. The rod extends into a cavity within the clamp housing. A toggle lever assembly is coupled at one end of the rod inside of the clamp housing. A sensor assembly is coupled with the clamp housing. The sensor assembly includes a pair of sensors or switches spaced from each other and positioned on a mounting plate. The mounting plate is slidably secured within the clamp housing. A sensor pickup is movably positioned on the rod so that the sensor pickup is multi-positionable on the rod to adjust the stroke of the toggle lever assembly.

Abstract: A mounting device for mounting a machine tool to a floor area is provided. The mounting device includes mounting units that are attachable to the machine tool. Counter-mounting units are disposed on the floor area. The mounting device may also include electromagnets that are disposed on either the mounting units or the counter-mounting units. The machine tool can be mounted or removed by switching the electromagnets on and off. When one of the mounting units or the counter-mounting units includes the electromagnets, the other may include a ferromagnetic material.

Abstract: A spindle apparatus according to the present disclosure includes a housing, a spindle rotatably installed in the housing, a tool releasably engaged with one end of the spindle and having an insert tip movable in a radial direction of the tool, a first draw-bar movably mounted in the spindle, and a second draw-bar movably mounted in the first draw-bar. The tool and one end of the first draw-bar are releasably engaged with the one end of the spindle by a movement of the first draw-bar, and the insert tip is configured to move in the radial direction by a movement of the second draw-bar.

Abstract: A spindle unit for machine tools that includes a working spindle rotationally bearing-mounted in axially spaced spindle bearings in a spindle case, and an electric driving motor. The working spindle includes at its head side a clamping device for a tool and at its rear side a non-rotating ring cylinder for activating said clamping device via a rotating tie rod, and rotational bushing for supplying said tool with cooling and/or lubricating agents through a hydraulic conduit extending longitudinally through said working spindle. At least a segment of the non-rotating ring cylinder may be received in the rear end portion of said working spindle.

Abstract: An emergency stop system for suppressing the possibility that an emergency stop state of a machine is released due to the shock of the falling of an emergency stop switch that stops an operation of the machine in an emergency is provided.