Abstract: Described herein are examples of welding technique monitoring systems that provide lightweight, self-contained, and highly portable means of monitoring welding technique and/or providing technique feedback. The systems use a portable support platform that can be easily transported to different welding stations/sites, providing a marked advantage over legacy monitoring systems that use heavy welding stands that are difficult to move. After an initial calibration, the systems can consistently and repeatedly monitor welding technique relative to a particular joint with no additional calibration necessary, even if there is sensor and/or platform movement. The systems are additionally able to detect a welding-type operation without the need to communicate with welding equipment. The systems are further configured for use with existing (rather than potentially expensive custom) welding-type tools, thereby keeping the systems low cost and highly portable.

Abstract: A welding information providing device is proposed. The device can provide a high-quality image that can easily identify a welding surrounding environment in addition to a portion adjacent to welding light by synthesizing images obtained under various photographing conditions. The device can also improve welding quality by providing an efficient guiding to an operator with respect to a current welding operation state. The device can include a cartridge unit that is located on a main body and selectively shields welding light, at least one camera unit that faces outward and obtains a welding image frame of a welding operation, and a sensor unit that detects a degree of light in at least a welding operation area. The device can also include an image display and a processor that provides a welding image generated through the welding image frame to the image display unit.

Abstract: A method of mitigating arcing events in a hot wire process is provided. The method includes monitoring an arcing frequency of a hot wire process and monitoring at least one of an energy, a power, a deposition amount, or a deposition rate of the hot wire process. The method further includes adjusting at least one of a hot wire current, a hot wire voltage, a hot wire waveform characteristic, a wire feed speed, a wire approach angle, or a contact tip-to-work distance of the hot wire process to balance the arcing frequency against at least one of the energy, the power, the deposition amount, or the deposition rate of the hot wire process, where it is desirable for the arcing frequency to be low, and where it is desirable for the energy, the power, the deposition amount, or the deposition rate to be high.

Abstract: A steel welded member having a high LME resistance of a spot weld, i.e., a steel welded member comprised of a plurality of Zn-based plated steel materials, each comprised of a steel material and a Zn-based plating layer on its surface, joined by at least one spot weld, in which at least one of the Zn-based plated steel materials has a 780 MPa or more tensile strength, that steel material has a chemical composition containing, by mass %, C: 0.05 to 0.40%, Si: 0.2 to 3.0%, Mn: 0.1 to 5.0%, sol. Al: 0.4 to 1.50%, etc. and having a balance of Fe and impurities, and, in a region of 10 to 300 ?m from an end of a pressure weld of the spot weld, a difference of a Zn penetration depth of Zn from a Zn-based plating layer penetrating a steel material minus a depth of an internal oxidation layer formed at the steel material is within 0.1 to 10.0 ?m in range.

Abstract: A one-sided spot welder includes a cylinder that includes a cylinder body and a rod, the rod projecting from an inside of the cylinder body by driving the rod toward one side in an axial direction, the rod retracting toward the inside of the cylinder body by driving the rod toward another side in the axial direction; an arm that is fixed to the rod; and a first welding electrode that is fixed to the arm, a tip of the first welding electrode being disposed on the another side in the axial direction than a base end of the first welding electrode.

Abstract: A method of electron beam welding a plurality of secondary components to a primary component. The method comprises: (a) on a first weld path which defines a respective section of the primary component to be welded to a first secondary component, forming, by electron beam welding, a spot weld which joins the primary component and the first secondary component at a respective spot weld location on the first weld path; and (b) on a second weld path which defines a respective section of the primary component to be welded to a second secondary component, forming, by electron beam welding, a spot weld which joins together the primary component and the second secondary component at a respective spot weld location on the second weld path. Each of steps (a) and (b) is repeated at least once, in any order, so as to form, on each of the first and second weld paths, a respective set of contiguous spot welds arranged along the respective weld path.

Abstract: An ultrasonic welding system is provided. The ultrasonic welding system includes a support structure for supporting a workpiece. The ultrasonic welding system also includes a weld head assembly including an ultrasonic converter carrying a sonotrode. The ultrasonic welding system also includes a conductive pin supply configured to provide a plurality of conductive pins for welding using the sonotrode.

Abstract: A method for sizing a section of a junction by orbital friction welding with an eccentric e, between a blade and a stub of a bladed disk for a turbomachine. The sized section has a rounded contour at one or two ends of said section along a chord of the blades, each corresponding to a leading edge or a trailing edge of said blades, said rounded contour(s) having over a sector of at least 120° an average radius of at least twice the eccentric e.

Abstract: An electrical steel strip welded joint is provided that is able to inhibit the occurrence of coil joint fracture on a production line caused by deterioration of mechanical properties and shape of the coil joint. The steel microstructures of the joined portion and the thermo-mechanically affected zone are mainly ferrite phase, and satisfy the relationships of the following Expressions (1) to (4). Dsz ? 200 ? ? ? m ( 1 ) Dhaz ? 1 ? Dbm ? 1 ( 2 ) Dhaz ? 2 ? Dbm ? 2 ( 3 ) 0.9 × ( Hbm ? 1 + Hbm ? 2 ) / 2 ? Hsz ? 1.

Abstract: A method for laser beam welding of a plurality of component parts at a plurality of processing locations of a component by using a laser welding apparatus includes (a) measuring a respective processing location of the plurality of processing locations by using a measurement beam and/or by using a sensor system, and (b) laser beam welding of a previously measured processing location of the plurality of processing locations by using a processing beam. The steps (a) and (b) are carried out in parallel.

Abstract: A laser welding method includes: a first step of irradiating a target with a first laser beam; and a second step of irradiating a melting region melted in the first step with a second laser beam to maintain a melting amount of the melting region. The first laser beam is irradiated in a first configuration in which an output of the first laser beam is lowered by a predetermined amount when a predetermined time elapses, and an output of the second laser beam is set to be smaller than the output of the first laser beam, or in a second configuration in which the first laser beam includes a laser beam having a first wavelength and a first output, and the second laser beam includes a laser beam having the first wavelength and an output smaller than the first output, and/or being in a defocused state.

Abstract: The invention relates to a processing apparatus (1) for processing an object (9) by means of laser pulses (3), which at least comprises: at least one laser beam source (2) configured for the emission of laser pulses (3), at least one beam exit device (4), which is configured to guide the respective laser pulses (3) with a predetermined laser pulse cross-sectional profile according to a pulse distribution profile (11) in a processing area (7) of a preset processing volume (8) of an object (9) to be processed, and a control device (10), which is configured to ascertain the pulse distribution profile (11) in the processing area (7) according to a predetermined pulse distribution ascertaining method for the preset processing volume (8) and the predetermined laser pulse cross-sectional profile.

Abstract: A laser device and a method for producing a perforation on a workpiece for various laser devices is disclosed. Two beam sources in the form of lasers may be located to act on the workpiece to be processed. The workpiece is deposited in a defined manner on a processing table and a laser beam emitted by the beam source is deflected in the direction of the workpiece and focused for processing. Control is effected via software running in a control unit where the workpiece is processed by adjusting a carriage in the X-Y direction or by adjusting an angle of a mirror. A “perforation” option may be loaded or used such that during processing of the workpiece, a continuous line or incision is formed on an upper side of the workpiece over a defined depth, and indentations or cuts are formed at defined intervals.

Abstract: A method for computing a machining toolpath applied for laser machining process, in which a laser beam is emitted by a laser head installed in a laser machine tool for ablating the material of a part for forming a pattern thereon.

Abstract: Discussed is a welding device capable of minimizing welding defects, a battery manufacturing device and a vehicle manufacturing device including such a welding device are provided. The welding device can include a laser irradiation module configured to irradiate a laser to a welding portion; a protection module disposed outside the laser irradiation module and configured to block flying particles scattered from the welding portion; and a blocking module disposed outside the protection module and configured to block an inflow of the flying particles to the protection module by introducing a gas therein.

Abstract: An addictive manufactured object manufacturing method includes: a shell portion forming step of additively forming a shell portion corresponding to an outer portion of an addictive manufactured object by a shell portion beads formed by weaving welding; and a core portion forming step of additively forming a core portion corresponding to an inner portion of the addictive manufactured object by a core portion bead formed by welding.

Abstract: The object is to provide a technology capable of appropriately removing polycrystalline protrusions. A manufacturing apparatus for a semiconductor device includes: a laser oscillation device configured to irradiate a second main surface of a semiconductor component disposed on a stage with a first laser light and a second laser light higher in output than the first laser light; a scattered light detector to detect scattered light scattered by protrusions in the first laser light; and a laser controller to cause the laser oscillation device to irradiate the protrusions with the second laser light, based on a detection result of the scattered light detector.

Abstract: A laser processing machine for forming grooves or perforations in a workpiece from its one side includes a holding unit that holds the workpiece at the other side to have the one side exposed, a laser irradiation unit having a laser oscillator that emits a laser beam and a condenser that concentrates the laser beam and irradiates the workpiece with the concentrated laser beam, and a liquid ejection nozzle that ejects liquid to an irradiation region where the workpiece is to be irradiated with the concentrated laser beam on its one side, to form a thin film of the liquid. The workpiece is irradiated with the concentrated laser beam through the thin film of the liquid. A laser processing method is also disclosed.

Abstract: Methods for determining laser pulse positions for shaping an optical element may comprise: determining a stress field for at least a portion of a substrate, wherein the stress field comprises at least three components of stress, wherein the stress field comprises a plurality of stress states for the at least a portion of the substrate; determining, based at least on the stress field and a calibration model, a spot density over the at least a portion of the substrate; determining, based on the spot density, a laser spot position allocation that arranges a number of laser pulses into a minimum number of lines that achieves the spot density; and causing, based on the laser spot position allocation, output of a machine program that coordinates a rotation stage, beam shaping, a translation stage, and a laser firing parameter for surface shaping of the at least a portion of the substrate.

Abstract: The method disclosed here is a method for producing an electricity storage device including positive and negative electrodes, and includes overlaying a plurality of laminated layers of current collecting foil and a current collector in at least one of the positive electrode or the negative electrode. The method also includes placing a laser light transmissive member on the layers of current collecting foil overlying the current collector such that a portion of the laser light transmissive member extends off from an end portion of the layers of the current collecting foil overlying the current collector. The method further includes applying laser light to a region including the end portion of the layers of the current collecting foil overlying the current collector through the laser light transmissive member to perform welding of the layers of the current collecting foil overlying the current collector and the current collector.

Abstract: Described herein are examples of welding technique monitoring systems that provide lightweight, self-contained, and highly portable means of monitoring welding technique and/or providing technique feedback. The systems use a portable support platform that can be easily transported to different welding stations/sites, providing a marked advantage over legacy monitoring systems that use heavy welding stands that are difficult to move. After an initial calibration, the systems can consistently and repeatedly monitor welding technique relative to a particular joint with no additional calibration necessary, even if there is sensor and/or platform movement. The systems are additionally able to detect a welding-type operation without the need to communicate with welding equipment. The systems are further configured for use with existing (rather than potentially expensive custom) welding-type tools, thereby keeping the systems low cost and highly portable.

Abstract: A corner fitting includes a sleeve body having a hollow inner space and configured to coaxially fit over a pipe member of a predetermined size. An edge of the sleeve body at a second distal end has a corner cut portion, a protruding tab, and two recesses, the protruding tab being diametrically opposed to the corner cut portion in the radial direction of the sleeve body, and the recesses being diametrically opposed to each other in the radial direction of the sleeve body. The corner cut portion is configured and shaped such that the sleeve body fits together with an identical sleeve body on the pipe member of the predetermined size with the corner cut portions of the two sleeve bodies contacting each other and with the pipe being nested between the protruding tabs of the second distal ends of the two sleeve bodies.

Abstract: It is possible to weld first and second members at various angles and allow melted members to flow onto a welding surface without dripping downward. An ultrasonic welding apparatus includes: a first robot including a holding part configured to hold a first member rotatably and tiltably and a moving part configured to move the robot itself; and a welding main body in which a second member is disposed on the first member held by the holding part of the first robot and which perform welding by vibrating the first and second members by an ultrasonic horn.

Abstract: A bonding head for holding a substrate to be soldered includes a laser source, a vacuum source, a main body and a holding nozzle. A laser duct extends through the main body to a laser exit. The vacuum source creates a vacuum in the laser duct. The laser source directs the laser beam through the laser duct towards the laser exit. The holding nozzle is connected to the main body. A nozzle duct extends through the holding nozzle from a nozzle entry to a nozzle exit. The nozzle entry is adjacent to the laser exit. The holding nozzle is configured to hold the substrate at the nozzle exit when the vacuum source creates the vacuum in the laser duct. The laser beam passes through the nozzle duct and is directed towards the substrate. The holding nozzle is configured to hold the substrate over a mounting face of a second substrate.

Abstract: A lock and pin for the structural and fluid tight repair of cracks not amenable to high temperature repairs or synthetic material patches. Fluid tight pins and locks seal the crack while one or more locks prevent the crack from growing. These repairs need to endure the remaining life cycle of the machinery part while withstanding all the strain, pressure, heat and expansion and contraction of the part before the crack(s) were formed. Often these cracks evolved due to engineering design flaws that will require even greater strength from these areas than when new.

Abstract: The cavitation process is performed on the inner surface of the target hole. The cavitation processing method includes; attaching a cap having a through hole to an inlet of a target hole of a workpiece; immersing the workpiece and a nozzle into a processing liquid; and ejecting a jet of the processing liquid from the nozzle located outside of the target hole to an inside of the target hole through the through hole such that a cavitation process is performed on a processing region that is located downstream of a non-processing region covered by the cap on an inner surface of the target hole.

Abstract: A task of insertion of a tool is continued even when the insertion of the tool is failed in a shrink fitting method. A shrink fitting system for shrink-fitting a tool to a holder includes: a heating device that heats the holder; an insertion device that inserts the tool into the heated holder; and a control device for the shrink fitting system. The insertion device includes a sensor that detects a failure of insertion of the tool into the holder. Based on the failure of the insertion of the tool into the holder being detected, the control device performs at least one of outputting, to the insertion device, a command for adjusting an insertion position of the tool or for replacing the tool and outputting, to the heating device, a command for re-heating the holder.

Abstract: A method of manufacturing a planetary gear carrier includes a sintering step of forming a front carrier cap by sintering, an ion-nitrided layer forming step of forming an ion-nitrided layer on a surface of the sintered front carrier cap, a welding portion machining step of machining a surface of a welding portion of the front carrier cap by a thickness of the formed ion-nitrided influence layer, and a welding step of welding a welding portion of the front carrier cap connected to a component with a different type of material different from a material of the front carrier cap so that the welding portion is joined to the component with the different type of material.

Abstract: A method for processing a heat exchanger includes: arranging a plurality of heat exchange tubes at intervals along a first direction; limiting the heat exchange tubes by a limiting device; and moving a first tube section of at least one heat exchange tube along the first direction by a preset distance relative to a remaining part of the heat exchange tube, such that a length direction of a part of the first tube section is at an angle to a length direction of the remaining part of the heat exchange tube. One or more first tube sections are provided. When the first tube section of the heat exchange tube moves in the first direction, the second tube section and the third tube section on two sides of the first tube section in the length direction of the heat exchange tube move toward each other.

Abstract: A light module projects multiple light beams onto an installation surface to form multiple light indicia spaced apart in a pattern on the installation surface, with the light indicia identifying installation locations on the installation surface where construction mounts are then installed. Embodiments include systems in which the light module includes a light emitter that projects a source light beam and a diffractor that diffuses the source light beam into the multiple light beams, systems in which the light module is adjustably mounted to and movable with a handheld tool used to install the construction mounts, systems in which the light module is adjustably mounted to a static-use support, and methods of using these systems to install the construction mounts.

Abstract: A work piece holder provided herein includes a support baffle and an elevating element. The support baffle extends along an arc path. The elevating clement is disposed on the support baffle and is pivoted to be movable between an unlock status and a lock status.

Abstract: A one-piece tooling apparatus configured to position two or more types of workpieces can be utilized in connection with a process on the workpieces. In particular, a one-piece tooling apparatus comprising a column comprising a hollow inner column adapted to receive an insert and an outer column, wherein the insert is adapted to support a workpiece to be processed, a base configured to affix the column to a part processing apparatus for processing the workpiece, and a platform coupled to the outer column adapted to support the workpiece to be processed.

Abstract: A system for manufacturing a plurality of can bodies includes a number of forming machines for forming one or more portions of the can bodies. Each forming machine includes a number of removable components. The system further includes a maintenance device including a housing, a changeout arrangement coupled to the housing, and a controller positioned on or in the housing. The changeout arrangement is configured to selectively remove and replace a removeable component of one or more of the number of removeable components of one or more of the number of forming machines under the direction and control of the controller.

Abstract: An arrangement for use in forming a can body, the arrangement including a forming die structured to form a portion of the can body, the forming die having a portion comprising a photoluminescent material.

Abstract: A skate blade sharpening system used to sharpen the blades of ice skates. The skate sharpener can include a housing that includes an elongated slot for receiving the blade of an ice skate for sharpening, and clamp jaws for retaining the skate. The housing can include at least one slot cover to engage the skate blade. Engagement of the skate blade can be sensed by a controller to enable sharpening operations to proceed. The skate blade sharpening system can automatically operate a grinding wheel and move the rotating grinding wheel back and forth along the lower face of the skate blade a desired number of times to sharpen the skate blade.

Abstract: A glass polishing apparatus includes a jig that holds a glass structure. The glass polishing apparatus includes a first flat portion, a second flat portion opposite to the first flat portion, and a curved portion connecting the first flat portion to the second flat portion. The jig and includes a first holding surface holding the first flat portion, a second holding surface disposed opposite to the first holding surface and holding the second flat portion, and a third holding surface connecting the first holding surface to the second holding surface and holding the curved portion. At least a portion of a roller unit having a cylindrical shape is inserted between the first flat portion and the second flat portion.

Abstract: A method capable of detecting a wrong workpiece (e.g., wafer), which is not an object to be polished, is disclosed. The method includes: creating inspection spectrum data of reflected light from a workpiece before polishing of the workpiece or after beginning of polishing of the workpiece; inputting the inspection spectrum data to an autoencoder; calculating a difference between output data from the autoencoder and the inspection spectrum data; and determining that, when the difference is larger than a threshold value, the workpiece used to create the inspection spectrum data is a wrong workpiece which is not an object to be polished.

Abstract: A chemical mechanical polishing apparatus includes a first polishing pad for polishing a substrate, a first polishing head on the first polishing pad to support a substrate, and a second polishing pad spaced apart from the first polishing pad in a horizontal direction. A radius of the second polishing pad is less than a radius of the first polishing pad.

Abstract: A chemical mechanical polishing device is provided according to some embodiments. The chemical mechanical polishing device comprises a polishing pad. The polishing pad includes a plurality of stacks of first pad fractions and a plurality of stacks of second pad fractions. The first pad fractions and the second pad fractions have different hardness. The stacks of first pad fractions and the stacks of the second pad fractions are arranged with a pattern corresponding to a predetermined feature of a structure to be polished by the chemical mechanical polishing device. The predetermined feature may include a surface profile or a material of the structure to be polished.

Abstract: A method of using a polishing pad includes applying a slurry in a first region of the polishing pad. The method further includes spreading the slurry across the first region of the polishing pad at a first rate. The method further includes spreading the slurry across a second region at a second rate different from the first rate, wherein the second region is farther from a center of the polishing pad than the first region. The method further includes spreading the slurry across a third region at a third rate different from the second rate, wherein the second region is between the third region and the first region.

Abstract: A power tool includes a housing, a motor positioned within the housing, an output shaft driven by the motor, the output shaft configured to be coupled to an accessory for operation thereof, a sensing circuit configured to detect, during operation of the power tool, an operating characteristic of the motor, and a controller. The controller is configured to receive a signal from the sensing circuit representing the operating characteristic of the motor, compare the operating characteristic of the motor to a first predetermined threshold, and in response to the operating characteristic exceeding the predetermined threshold, perform a loss of control check on the power tool. Performing the loss of control check includes comparing a detected motion of the power tool to a second predetermined threshold, and tripping loss of control functionality based on whether the detected motion of the power tool exceeds the second predetermined threshold.

Abstract: A polishing method includes: during polishing of the workpiece, creating a reference spectrum history and a monitoring spectrum history by repeatedly producing a reference spectrum and a monitoring spectrum at two points on the workpiece; calculating a plurality of reference history differences that are differences between a latest monitoring spectrum and a plurality of reference spectra in the reference spectrum history; calculating a plurality of monitoring history differences that are differences between a latest reference spectrum and a plurality of monitoring spectra in the monitoring spectrum history; calculating a film-thickness difference between a monitoring point and a reference point based on a local minimum point of a reference history difference or a monitoring history difference.

Abstract: A method of processing a substrate includes polishing a front surface of a substrate on a first pad coupled to a first platen. The method further includes transferring the substrate from the first pad to a second pad coupled to a second platen with a carrier head. The method further includes moving the carrier head to a scan position to place an edge of the substrate above an orientation sensor disposed at a rotational center of the second pad. The method further includes scanning the edge of the substrate with the orientation sensor to produce a signal. The method further includes analyzing the signal to locate a reference mark of the substrate to determine a rotational orientation of the substrate relative to the carrier head.

Abstract: A belt sander includes a shield, a housing, and a sanding belt. The shield includes a main plate unit and an extension plate unit. The main plate unit cooperates with the housing to define a protection space. The extension plate unit extends from the main plate unit toward the sanding belt, and cooperates with the housing to define an opening that is in spatial communication with the protection space. The extension plate unit is spaced apart from the sanding belt in a first extending direction of a first axis, and cooperates with the sanding belt to define a first gap therebetween in the first extending direction. The extension plate unit is spaced apart from the sanding belt in a second extending direction of a second axis substantially orthogonal to the first axis, and cooperates with the sanding belt to define two second gaps therebetween in the second extending direction.

Abstract: A probe cleaning sheet and a manufacturing method thereof are provided. The manufacturing method includes material preparing step, first printing step, first baking step, first cooling step, second printing step, second baking step, and second cooling step. The probe cleaning sheet includes a silicone glass fiber cloth layer and an abrasive layer set printed on one side of the silicone glass fiber cloth layer. The silicone glass fiber cloth layer includes a plurality of glass fibers and silicone, the silicone is coated on the surface of the glass fibers and in the gap between the glass fibers. The abrasive layer set includes a high-density abrasive layer printed on one side of the silicone glass fiber cloth layer and a low-density abrasive layer printed on the top surface of the high-density abrasive layer and is opposite to the silicone glass fiber cloth layer.

Abstract: A grinding block suitable for different radians, which relates to a grinding block technique, and comprises a grinding block body, at least one soft shaft set in the grinding block body, connecting grooves set on both sides of the grinding block body and a grinding block set at the bottom of the grinding block body. The soft shaft comprises a soft shaft body and a stable shaft fit at both ends of the stable shaft. A positioner is set at a stable shaft end away from the soft shaft body and several Positioning Ribs I1 are spaced in the soft shaft body. By setting the shaft in the grinding block body and supporting the block body, the stability of the grinding block body after bending and deformation can be ensured.

Abstract: Example implementations relate to a sanding tool having an intermediate adapter pad. The sanding tool includes a rigid base plate configured for releasable attachment to a number of sanding handles. The sanding tool also includes an adapter pad that comprises: an upper portion configured to receive the rigid base plate, the upper portion including a perimeter portion that extends above an upper surface of the rigid base plate; and a lower surface configured for releasable attachment to a lower pad, wherein a lower surface of the lower pad is configured for releasable attachment to a working material. The perimeter portion includes a channel configured for releasable attachment to a suction ring, or a bristle ring, or both.

Abstract: The device is a multi-purpose drive socket capable of engaging both a penta-bolt and a hex-bolt. The device is specially adapted for use in the utility industry where multiple tools are typically needed for securing electrical equipment. The device contains a retractable plunger that slides in and out of the head opening. To remove a penta-bolt, the user simply presses the plunger head up against the head of the penta-bolt, causing the plunger to retract back into the socket body. Once fully inserted, the user can loosen or tighten the penta-bolt. To remove a hex-bolt, the user inserts the hex-head into a recessed opening in the plunger head and tightens down the hex-bolt until the hex-head breaks off at the shank. In the event the hex-head remains lodged in the plunger, the device also contains an ejector pin capable of dislodging and removing the hex-head.

Abstract: An open-ended head includes a first head jaw, a second head jaw and a head channel. The first head jaw extends widthwise between a first jaw flat and a first head edge surface. The second head jaw extends widthwise between a second jaw flat and a second head edge surface. The head channel projects lengthwise into the open-ended head. The head channel extends widthwise within the open-ended head between the first jaw flat and the second jaw flat. The open-ended head is configured from or includes a metal material. An adaptor is mated with the open-ended head. The adaptor is wrapped around the first head jaw and covers the first jaw flat and the first head edge surface. The adaptor is wrapped around the second head jaw and covers the second jaw flat and the second head edge surface. The adaptor is configured from or includes a polymer material.

Abstract: A power tool includes an anvil (14) operably driven by a motor (10); an insertion hole (91) defined the anvil, into which a bit is insertable; a through hole (92) extending radially from the insertion hole; a ball (93) disposed in the through hole; and a manually-movable sleeve (99) mounted around on the anvil and being axially slidable relative to the anvil. At a retracted position, the manually-movable sleeve presses the ball radially inwardly. At an advanced position, the manually-movable sleeve releases the pressing of the ball. A flat spring (97) is configured to bias the ball radially inwardly. The manually-movable sleeve has a length such that the flat spring is exposed at the advanced position.