Abstract: A method for producing a piston for an internal combustion engine may include arranging a piston upper part and a piston lower part in a friction welding device. The piston upper part may include a piston head with a combustion recess. The piston lower part may include two mutually opposite skirt elements connected to one another via two mutually opposite pin bosses. The method may also include arranging a deflecting device configured to deflect at least one weld bead one of on and in the friction welding device. The method may further include joining the piston upper part and the piston lower part to one another via friction welding.

Abstract: A method for integrally bonding a cast aluminum component to a joining partner. The method includes laser-treating a region of the cast aluminum component that is to be connected to the joining partner. The laser treatment is carried out via a pulsed laser system having a pulse duration of 100 to 200 ns, and an impulse frequency of 10 to 80 kHz. The method also includes integrally bonding the cast aluminum component and the joining partner.

Abstract: A laser processing system is disclosed, which includes a system frame, a process frame movably supported by the system frame, an optics wall coupled to the process frame, a process shroud coupled to the system frame and extending over and alongside upper and lateral peripheral regions of the optics wall and an optics shroud coupled to the process shroud. The process frame is configured to support a laser source, a workpiece positioning system and a beam delivery system. The process frame is moveable relative to the process shroud and the process frame is moveable relative to the optics shroud. The process shroud, the optics wall and the process frame enclose a first space for laser processing of a workpiece. The optics shroud, the optics wall and the process frame enclose a second space for accommodating the laser source.

Abstract: A metal member includes a first plate, and a second plate abutting against and welded to the first plate in at least one butt portion. In the butt portion, a length from a first end to a second end of a welding boundary line between the first plate and the second plate is longer than a length of a straight line connecting the first end to the second end of the welding boundary line.

Abstract: For producing a welded ring, a band having a length corresponding to the circumference of the ring is bent to form a ring and its two ends are welded together. The band ends to be welded together have an offset in the circumferential direction of the ring, the offset lying in the plane of the band. The welding is performed form both lateral edges of the ring from the outside up to the offset. This avoids an overlapping weld of a welding quality that is different at the centre of the ring from that at the edges.

Abstract: An additive manufacturing system includes a platform, a dispenser to dispense a plurality of layers of feed material on a top surface of the platform, a light source to generate a first light beam and a second light beam, a polygon mirror scanner, a galvo mirror scanner positioned adjacent to the polygon mirror scanner, and a controller. The controller is coupled to the light source, the polygon mirror scanner and the galvo mirror scanner, and the controller is configured to cause the light source and polygon mirror scanner to apply the first light beam to a region of the layer of feed material, and to cause the light source and galvo mirror scanner to apply the second light beam to at least a portion of the region of the layer of feed material.

Abstract: An additive manufacturing apparatus and methods relating to forming multiple layers on an object on a support including dispensing a layer of feed material over the support, fusing a portion of the layer of feed material to form a fused portion in the layer, determining to rework a particular region in the fused portion, and reworking the particular region. Reworking the particular region includes establishing a gas flow directed towards the particular region and producing a melt pool having a keyhole within the particular region.

Abstract: A process of welding a weld turbulator on an article includes forming a weld pool on a surface of the article using an arc welder, directing at least one beam of at least one beam welder to at least one fusion edge of the weld pool, and translating the arc welder and the beam welder in a weld direction to shape the weld pool into the weld turbulator extending in the weld direction and having the fusion edge. A turbulator welding system includes an arc welder arranged and disposed to provide an electric arc on a surface of an article to form a weld pool and at least one beam welder arranged and disposed to provide at least one beam to at least one fusion edge of the weld pool. A component includes an article having a surface and a weld turbulator on the surface of the article.

Abstract: A method for manufacturing a laser processed product including a laser processed part is performed by using a laser oscillation section, a beam splitting section and an imaging section. The manufacturing method includes: forming an irradiation mark including an irradiation pattern in a reference irradiation surface by using the laser oscillation section and the beam splitting section, the irradiation pattern including a plurality of irradiation spots; obtaining an image of the irradiation mark via the imaging section; determining a representative position based on positions of the plurality of irradiation spots in the image; determining a deviation amount of deviation of the representative position from a target position; and forming the laser processed part with a irradiation position corrected based on the deviation amount.

Abstract: A laser cutting head with movable mirrors may be used to move a beam, for example, to provide beam alignment and/or to provide different wobble patterns for cutting with different kerf widths. The laser cutting head includes a cutting nozzle for directing the laser beam together with a gas to a workpiece for cutting. The movable mirrors provide a wobbling movement of the beam within a relatively small field of view, for example, within an aperture of the cutting nozzle. The movable mirrors may be galvanometer mirrors that are controllable by a control system including a galvo controller. The control system may also be used to control the fiber laser, for example, in response to the position of the beams relative to the workpiece and/or a sensed condition in the cutting head such as a thermal condition proximate one of the mirrors.

Abstract: A laser containment system in which a platform is suspended above a table on which laser light experiments will be performed. A number of curtain pockets having U-shaped cross sections are mounted beneath the platform, with the pocket openings facing down toward the sides of the table. A roller is mounted between end walls inside each pocket, and a laser curtain long enough to be lowered past a corresponding side of the table is wound on each roller. A clutch supported on an end wall of each pocket operatively engages an end of the roller inside the pocket to lower or raise the curtain on the roller. An associated clutch pulley is disposed outside the end wall of each pocket on which the clutch is supported. A curtain chain engages the circumference of the pulley, and the chain hangs outside the curtain when lowered for access by a user.

Abstract: The present disclosure relates to a system of modular functional blocks that may be used to facilitate easy assembly of a welding head assembly in any one of a wide variety of configurations to allow for distribution of welding wire, gas, cooling fluid and other media throughout an interconnected assembly of the modular functional blocks. As such, the modular functional blocks can be mixed and matched into any desired configuration as needed depending on the welding process being undertaken. The modular functional blocks may be in the form of one or more different welding wire delivery blocks, gas delivery blocks, cooling water delivery blocks, shim plates, end plates, shield cup, cover plates, insulating plates, etc.

Abstract: Non-hygroscopic brazing fluxes, methods for producing non-hygroscopic brazing fluxes, and methods for producing hydrated cesium aluminum fluorides are provided. An exemplary method for producing a non-hygroscopic brazing flux includes preparing a mixture including aluminum, cesium, and fluorine. The prepared mixture has an aluminum:cesium:fluorine molar ratio of about (1):(1.1-1.2):(4.0-4.2). The method further includes drying the mixture at a temperature higher than about 90° C. to form a product comprising at least about 20 mass percent hydrated cesium aluminum fluoride, based on the total mass of the product.

Abstract: A voltage sensing wire feeder includes a storage device and a user interface. The user interface is configured to receive a first selection and a second selection. The first selection is configured to direct the voltage sensing wire feeder to use a first group of settings stored in the storage device, and the second selection is configured to direct the voltage sensing wire feeder to use a second group of settings stored in the storage device.

Abstract: A method is for positioning a hollow workpiece obtained by casting and that enables the workpiece obtained in this way to be machined in accurate manner. The workpiece is obtained by a casting method involving a mold and a sacrificial core inserted inside the mold and serving to form at least one cavity in the workpiece. The workpiece includes surfaces of a first type defined during casting by the surfaces of the mold, and surfaces of a second type defined during casting by the surfaces of the core. A frame of reference for positioning the workpiece is constructed that includes at least three reference points (P1-P3) belonging to surfaces of the second type of the workpiece.

Abstract: A piston assembly and method of construction thereof for an internal combustion engine are provided. The assembly includes a piston head having an upper combustion wall with an undercrown surface and a ring belt region. The piston head has a floor with an upper surface and a bottom surface. The floor is spaced beneath the upper combustion wall in radial alignment with the ring belt region. A substantially enclosed, annular cooling gallery is bounded by the undercrown surface and the floor. A pair of pin bores depends directly from the floor of the cooling gallery. The assembly further includes a pin having ends configured for oscillating receipt in the pin bores. A pin bearing surface extends within the pin bores and between the pin bores in the lower surface of the floor. The assembly includes a connecting rod with an end fixed to the pin for conjoint oscillation therewith.

Abstract: A method of manufacturing a heat dissipation device is disclosed. The heat dissipation device manufactured with the method includes two titanium metal sheets, which are subjected to a heat treatment before undergoing mechanical processing, plastic working and surface modification. With these arrangements, the titanium metal sheets can be freely plastically deformed and possess a capillary force, and can therefore be used in place of the conventional copper material to serve as a material for making heat dissipation devices, and the heat dissipation devices so produced can have largely reduced weight and largely improved heat dissipation performance.

Abstract: A method of forming a component for a heat exchanger is disclosed. The method comprises machining a portion of a metal sheet to form a plurality of protrusions, and forming apertures in the portion of the metal sheet so as to form a plurality of ribs defined by adjacent ones of the apertures, wherein at least one protrusion is located on each of said ribs.

Abstract: A fastener delivery system includes an escapement mechanism configured to control dispensing of associated fasteners located in a column one associated fastener at a time and a rotate and present apparatus operable with the escapement mechanism. The apparatus is configured to rotate between a fastener receiving position and a fastener loading position. In the fastener receiving position the apparatus is adapted to receive each associated fastener released from the escapement mechanism, and in the fastener loading position the apparatus is configured to present each associated fastener to an associated fastener installation device. The escapement mechanism is adjustable in a height direction relative to the apparatus.

Abstract: The invention relates to a machine tool apparatus having a spindle (2), with a base flange (4) provided for attachment to the spindle (2) as part of a clamping tool quick-change tooling system (1), which further comprises an exchangeable flange (5), which is connectable to the chucking tool (3). Line sections (46) for data and/or energy transfer are arranged in the spindle (2), the base flange (4), the exchangeable flange (5) and the chucking tool (6), whereby coupling members (47) for connecting the line sections (46) to form a single line (FIG. 11) are provided on adjacent components in the transfer chain.

Abstract: A CNC apparatus and method of operating the CNC apparatus is provided in which the CNC machine additionally controls positionable air nozzles that can be used to provide a customized delivery of air to the cutting tool and substrate thereby minimizing damage and wear to the tool and preventing thermal damage of the substrate.

Abstract: A clamping system for machine tools includes a body portion configured to be received in a holding fixture of a machine, a tool holder integrally formed with and extending longitudinally from the body portion, the tool holder having a mounting mechanism on a distal end thereof for receiving a cutting tool, at least one fluid delivery vein extending through the tool holder from the body portion to the distal end of the tool holder, and at least one outlet at the distal end of the tool holder, the at least one outlet being configured to direct a fluid from the at least one fluid delivery vein toward at least one of the cutting tool and a workpiece.

Abstract: A calibration device (30) for a machine tool is described that includes a base (36) attachable to a machine tool and a calibration artefact (32), such as a sphere of known radius. A deflection mechanism attaches the calibration artefact to the base and allows movement of the calibration artefact (32) relative to the base (36) when an external force is applied to the calibration artefact (32). The deflection mechanism also maintains the calibration artefact (32) in a defined rest position relative to the base (36) in the absence of an applied external force. A sensor (46) is provided for sensing the extent of movement of the calibration artefact (32) relative to the base (36). A method of using the device (30) with a reference tool to accurately determine a position of a calibration artefact (32) is also described.

Abstract: A machine tool, in particular multi-spindle turning machine, comprising a machine frame, a turret body being rotatably supported by the machine frame, a plurality of workpiece spindles being arranged on the turret body, each of the workpiece spindles having a workpiece receiving portion for receiving a respective workpiece on one side of the turret body facing a working space of the machine tool, and a plurality of tool post assemblies supported by the machine frame around the turret body, wherein each tool post assembly includes a tool post having one or more tool cartridge receiving openings respectively being configured to detachably receive a tool holder cartridge TC holding a tool.

Abstract: The present disclosure relates to a machine tool, in particular multi-spindle turning machine, comprising a machine frame, a turret body being rotatably supported by the machine frame, a plurality of workpiece spindles being arranged on the turret body, each of the workpiece spindles having a workpiece receiving portion for receiving a respective workpiece on one side of the turret body facing a working space of the machine tool, and a torque motor for driving a rotation of the turret body. The torque motor is arranged at a back end portion of the turret body opposite to the side of the turret body facing the working space of the machine tool, and a position locking mechanism for locking a rotational position of the turret body is arranged at a front end portion of the turret body on the side of the turret body facing the working space of the machine tool.

Abstract: A grinding machine includes a plane grinding mechanism carrying a workpiece, an electrically controlled device mounted on the plane grinding mechanism, a grinder unit rotatably mounted on the plane grinding mechanism to grind the workpiece, and a smart working control system mounted on the plane grinding mechanism and electrically coupled to the electrically controlled device. The smart working control system includes a smart coder and a smart driver. When a load and a cutting force produced between the grinder unit and the workpiece reach preset parameters during the grinding process, the smart driver executes the working sequence or parameter setting program edited by the smart coder, to shorten a movement distance of the workbench of the plane grinding mechanism along the X-axis (leftward and rightward), and to produce an optimum lapping path.

Abstract: Disclosed is a concrete floor trowel machine of multiple blades with added floor polishing jacket or attachment. It saves expense and time associated with the use of a separate trowel and a polisher in consecutive order, often a day apart. Furthermore, disclosed is a blade replacement polisher disk with metallic hook-and-loop attached steel wool polisher puck, which is the loop component of that means of attachment. Means of slurry feed and suction removal to said puck is also disclosed, whereas said puck may rotate free or by planetary. Said pucks may be attached to blades. Safety cage and slurry splash cover supplement the machine. Removable caster legs are added to ease moving the off-use machine. Disclosed as well are robotic polisher-grinder modules in tandem or in train with changeable trowel-polisher modular inserts with electrical motors and power cable and water hose reels to be serviced from a distance, remotely controlled.

Abstract: A grinding device has a support unit attached to a rotary shaft so as to be rotatable integrally with the rotary shaft, and a grinding element stacked on the support unit and having an uneven grinding surface formed by a plurality of abrasive grains. The support unit has, in a surface thereof, protruding surface portions to be brought into contact with a rear surface of the grinding element when in use, and recessed surface portions recessed from the protruding surface portions, alternately located in a circumferential direction. An engagement mechanism which makes an engagement at each of predetermined angular positions so as to retain the grinding element or the support unit moved by a predetermined angle in the circumferential direction, is provided between the support unit and the grinding element, between the rotary shaft and the grinding element, or between the rotary shaft and the support unit.

Abstract: Described is a method for grinding workpieces, which comprise at least one cylindrical and profiled portion each, on one and the same grinding machine. The workpiece is ground initially in a first grinding operation in a first clamping in the grinding machine, said first grinding operation being followed by a second grinding operation once the first clamping has been released and then, before the start of the second grinding operation, a second clamping has been generated.

Abstract: A polishing method including polishing to polish a surface of a wafer by sliding the wafer held by a polishing head on a surface of a polishing pad while supplying a polishing slurry to the polishing pad attached to a turntable, the method including correlation derivation to obtain a correlation between a surface temperature of the polishing pad and a haze level of a wafer polished with the use of the polishing pad in advance before performing the polishing, and also the wafer is polished in the polishing while controlling the surface temperature of the polishing pad based on the correlation between the surface temperature of the polishing pad and the haze level of the wafer polished with the use of the polishing pad. Consequently, the polishing method can control a haze in polishing a wafer and thereby prolong the service life of the polishing pad.

Abstract: A wafer polishing method of polishing one surface of a wafer by rotating a rotating platen to which a polishing pad is affixed and a pressurizing head while supplying slurry onto the rotating platen and pressurizing/holding the wafer on the polishing pad with the pressurizing head, the method including: calculating an F/T value by monitoring a load current value F of a motor for rotating the rotating platen and a surface temperature T of the polishing pad during the wafer polishing; and controlling at least one of the rotation speed of the rotating platen and the polishing pressure of the pressurizing head based on the calculated F/T value.

Abstract: A drum sander having a fin for deflecting airflow around the drum and directing dust and debris to a dust collecting outlet. The fin includes a first section at a first angle and a second section at a second angle that directs air movement generated by the operating drum toward the dust collecting outlet. The free edge of the fin is shaped to wrap partially around the drum in two helical inclined planes. A tool free adjustment of parallelism may be provided. The workpieces are pulled through the sander rather than being pushed through. Lightweight materials reduce stress on the assembly. Heat is dissipated by the configuration and material of the drum.

Abstract: A grinding machine includes a grinding machine body and a grinding disc connected to the grinding machine body. The grinding machine body is provided with a pressure cavity at a position facing the grinding disc and a gas intake pipe corresponding to the pressure cavity. A pressure release gap in communication with the pressure cavity is formed between the grinding machine body and the grinding disc. The gas intake pipe induces a high-pressure gas into the pressure cavity, which receives an effect of the high-pressure gas to become a positive-pressure environment. The high-pressure gas is continually released via the pressure release gap to prohibit external dust from entering the pressure cavity. Thus, the grinding machine is capable of preventing dust from accumulating in the pressure cavity as well as effectively preventing moisture from entering the pressure cavity when the grinding machine is applied for wet grinding.

Abstract: Polishing tools and methods of polishing a glass substrate are disclosed. A polishing tool (200) includes a stem (220) and a polishing material (210) bonded to the stem (220). The polishing material (210) includes, in volume concentration, about 18% to about 42% phenolic resin, about 18% to about 30% zinc oxide, about 1% to about 10% magnesium oxide, a cooling agent, and an abrasive.

Abstract: The present invention relates generally to coated abrasive articles that include active filler particles in a supersize coat, a make coat, or combinations thereof, as well as methods of making and using said coated abrasive articles.

Abstract: A grinding apparatus includes: a holding table for holding a workpiece thereon; a grinding unit including a grinding wheel for grinding the workpiece held on the holding table, the grinding wheel including a grinding stone made of abrasive grains and grains of photocatalyst bonded by a vitrified bonding material; a grinding water supply unit configured to supply grinding water to the grinding stone when the workpiece held on the holding table is ground by the grinding unit; and a light applying unit disposed adjacent to the holding table and configured to apply light to a grinding surface of the grinding stone while the workpiece held on the holding table being ground.

Abstract: A surface modified abrasive particle may include a core abrasive particle and a coating functionally connected to a surface of the core abrasive particle. The core abrasive particle may have a median particle size of at least about 0.06 microns. The coating may include a compound selected from the group consisting of dopamine, tyrosine, dihydroxyphenylalanine, norepinephrine, epinephrine, normetanephrine, 3,4-dihydroxyphenylacetic acid, tannic acid, pyrogallic acid or combinations thereof.

Abstract: The present invention relates to a grinding disk or wheel, flap disk or cut-off disk which will increase the effectiveness of each battery charge during tool use.

Abstract: The abrasive unit contains a carrying disc (A) with a hub (1) set off in the central zone, having a coaxial hole (2) reinforced with a steel flange sleeve (3) for mounting the abrasive unit on the spindle of the angular hand grinder. The lower edges of numerous abrasive flaps (B) are fixed with glue binders (5) on the ring surface of the near-edge zone (4), the abrasive flaps subsequently overlapping one another in the circumferential direction so that their rear edges are exposed. The wheel of the carrying disc (A) is a layered polymer composite with reinforcement consisting of at least two meshes of glass fibre situated on both frontal surfaces of the carrying disc (A).

Abstract: Polycrystalline diamond constructions comprise a diamond body attached with a substrate during high pressure/high temperature processing, and include a modified reaction zone interposed between the body and substrate that is engineered to minimize or eliminate unwanted back diffusion of carbon from the diamond body into the substrate during the high pressure/high temperature processing.

Abstract: Embodiments are directed to a wood clamp that grips two perpendicularly arranged boards. A pair of gripping elements having planar surfaces may define a gripping jaw that is moveable to grip a first board A lateral support member may extend from a spacer orthogonally from a longitudinal direction of the pair of gripping elements and may define a projection. The projection may be configured to prevent sliding of a second board supported by the lateral support member and abutting the first board. A lockable handle assembly coupled with the pair of gripping elements may be configured to manipulate an offset between the pair of gripping elements by moving at least one of the pair of gripping elements and locking a position of the planar surfaces to maintain the offset using a linkage.

Abstract: A method for operating a vacuum gripping device including a suction gripper unit, which is provided with at least one suction gripper. The suction gripper unit can be connected, via a control valve device connected to it, selectively to a vacuum source or to a positive pressure source generating an ejector pulse in the suction gripper. The ejector pulse is generated as a function of the actual pressure established in the suction gripper unit after its connection to the positive pressure source. A vacuum gripping device suitable for executing this method and including a pressure measurement device for detecting the actual pressure and an electronic control unit used for controlling the control valve device and communicating with the pressure measurement device.

Abstract: A chuck assembly includes a chuck having a cross-shaped installation hole defined therethrough. A toothed disk is connected to the chuck and exposed from the outer periphery of the chuck. A driving unit includes a shaft and a gear which is mounted to the shaft. The driving unit is installed in the installation hole. The shaft includes two threaded sections respectively formed on two ends thereof. Two pawls each have threaded hole which is threadedly connected to the threaded section of the shaft corresponding thereto. When the gear is rotated to rotate the shaft, the two threaded sections are rotated to move the two pawls to move toward each other or away from each other.

Abstract: A torque wrench having a handle and an output shaft is disclosed. The output shaft may be constrained to turn only unidirectionally due to a ratchet. Rotation of the output shaft may be permanently disabled by an internal mechanism. Torque imposed on the output shaft may be limited by a torque responsive cam clutch. The handle forms or is part of an enclosure enclosing internal components such as the ratchet, the internal disablement mechanism, and the torque responsive cam clutch. A seal between the body and the output shaft prevents ingress and egress of lubricants and contamination between the inside of the body and the output shaft.

Abstract: A fabrication method of a holding sleeve is provided. The holding sleeve is adapted to dispose around a body portion of a main body and can rotate relative to the body portion. A blocking member is disposed in at least one through hole of a first sleeve. A second sleeve is movable relative to and disposed around the first sleeve. The blocking member is controllably pressed by the second sleeve to be partially received in an annular groove of the body portion. An elastic member is disposed around and between the first sleeve the first and second sleeves. Before the second sleeve is mounted to the first sleeve, a part of the elastic member corresponds to the blocking member in a radial direction of the first sleeve and can limit the blocking member to locate in the through hole.

Abstract: A method for operating a power tool having a motor for removing a screw from a counterpart is disclosed. A rotary element connects to the power tool to the screw. In a first section, if a first power limit is exceeded for a first duration, a change is made to a second section in which a temporal profile of the power is recorded for a second duration. A change is made into a third region when the power is above a second power limit for the second duration and a temporal fluctuation of the power is within a fluctuation value. A third power limit is determined based on power recorded in the second section. A change is made from the third section into a fourth section when the power drops below the third power limit within a third duration. In the fourth section, the power of the motor is reduced.

Abstract: A tool for extracting plugs or end caps.

Abstract: A press tool employs a drive system that allows a first portion to be displaced relative to a second portion. A drive surface is supported by the second portion. A receiving member defines an engaging surface and a receiving cavity. The receiving member is supported by the first portion along a drive axis extending through the drive surface. Operation of the drive system displaces the drive surface relative to the receiving member.

Abstract: The invention relates to a driver device, comprising a driving piston for driving a nail element into a workpiece, which driving piston is guided in a cylinder, and comprising a combustion chamber arranged adjoining the driving piston. In the course of a driving process, a pressure increase occurs in the combustion chamber as a result of a combustion process. Before the driving process, the driving piston is held in an initial position by means of a piston holder. The piston holder comprises a piezoelectric actuator.

Abstract: The invention relates to a fuel-operated firing device for driving securing elements into a substrate, comprising at least one main combustion chamber for a fuel, a driving piston that can be driven out of the main combustion chamber in a firing direction by expandable gases, and a pre-chamber with which an ignition device is associated and in which a pressure acting on the main combustion chamber can build up prior to a fuel-air mixture being ignited in said main combustion chamber. In order to improve the efficacy and/or functionality during the driving in of securing elements, a detection system is associated with the driving piston, said detection system being connected to an electronic feedback control device for control purposes, in order to detect an initial position of the driving piston prior to a firing operation.