Abstract: The present disclosure is directed to a reciprocating saw assembly including a saw unit. The saw unit includes a reciprocating mechanism having a reciprocating spindle to which a saw blade is attachable, a drive unit for providing torque to the reciprocating mechanism, causing the spindle to reciprocate, and an outer housing in which the drive is received. The outer housing includes a handle portion graspable by a user during a cutting operation. The reciprocating saw assembly further includes a clamping unit having a clamp housing pivotably coupled to the outer housing and a jaw movable relative to the clamp housing between a clamping position, in which the clamping unit is affixed to a workpiece to be cut, and a release position, in which the clamping unit is removable from the workpiece.

Abstract: A device and method for grinding and/or milling teeth of saw bands where a feed device for the clocked feeding of a temporary workpiece is formed from a plurality of mutually parallel saw bands includes a clamping unit into which the temporary workpiece is clamped, and a machining unit with at least one machining tool for simultaneous machining of a plurality of teeth of the temporary workpiece is individually modifiable and with which these types of teeth of saw bands can be efficiently and economically manufactured. The clamping unit is displaceable together with the feed device along a feed direction.

Abstract: Embodiments of present disclosure relate to thread machining apparatus (300), method and system. The thread machining apparatus (300) comprises: a spindle motor (310) adapted to drive a thread tool (200) coupled to an output shaft of the spindle motor (310) to rotate at a rotational speed; and a feeding device (320) movably coupled to the spindle motor (310), and configured to drive the spindle motor (310) to move along an axial direction (X) of the spindle motor (310) at a moving speed; wherein during thread machining, the moving speed is proportional to the rotational speed. The solutions of the embodiments of present disclosure have significantly improved the efficiency, stability and accuracy of thread machining.

Abstract: This arc spot welding method for dissimilar materials joins a steel upper plate and a non-ferrous metal lower plate. The upper plate has a flat plate-like base part and an upright wall part erected on the base part. The base part has a through-hole. The arc spot welding method for dissimilar materials includes superposing the base part on the lower plate so that the lower plate faces the base part via the through-hole; and arc-welding the base part and the lower plate by filling the through-hole with a molten weld metal at a position, which is a target position, offset in the direction opposite the upright wall part from the center of the through-hole.

Abstract: Disclosed example travel speed pacing systems for welding-type operations include: an interface configured to receive a first input describing a characteristic of a welding-type operation, and configured to receive an operation length of the welding-type operation; and control circuitry configured to: determine a target travel speed based on the first input; determine a target operation time based on the target travel speed and the operation length; and provide a time output representative of least one of a duration of the welding-type operation or a remaining amount of the target operation time.

Abstract: A contact device for a welding apparatus is disclosed. The contact device is for providing current to a first welding wire and a second welding wire. The contact device includes first and second contact jaws. The first and second contact jaws include a plurality of longitudinally extending grooves formed therein that form passageways for the welding wires. The welding wires can be positioned in a first configuration in which they are spaced apart and in a second configuration in which they are next to and contact each other.

Abstract: Disclosed example robotic welding tool tips include a body having a first end configured to be connected to a robotic welding torch in place of a nozzle and a second end having an angled surface.

Abstract: A shielding includes a first outer shell member that surrounds a welding torch, is disposed to form a radial gap from the welding torch, and is configured to define a first annular space having a first opening in a bottom portion thereof, a first gas supply member disposed to surround the welding torch inside the first outer shell member, and configured to supply a shielding gas to the first annular space, and a dispersing member disposed below the first gas supply member in the first annular space, and configured to disperse the shielding gas.

Abstract: The present disclosure is directed to systems and methods for pretreating a wire that is used in a welding operation to reduce the amount of hydrogen introduced into a weld. Using embodiments of the systems and methods disclosed herein, one passes a wire through a pre-treatment chamber in which a wire is treated to release hydrogen and/or other contaminants, and provides a gas flow through the pre-treatment chamber so that the contaminants that are released from the wire are taken up by the gas. The gas exiting the pre-treatment chamber may be isolated from the shielding gas utilized during a welding operation. For instance, the pretreatment gas may be directed away from the distal end of the welding torch, thereby preventing released contaminants from being transported into a weld.

Abstract: The present invention provides a modification to the EBW process, which is referred to as a slope-out methodology, the results in the formation of a “slope-out portion” located generally in that region of the overall weldment located at the end of the ordinary EBW welding process for joining two components. The slope-out portion overlaps with the initial weld of the workpiece for a given distance or length along the weld and effectively eliminates the keyhole and provides a weldment that has minimal to no defects, particularly in the slope-out portion. The slope-out methodology begins by adjusting various parameters related to the electron beam to essentially decay the beam. In general, the focus position of the electron beam is moved from under-focused (focal position in the bulk of the material) to over-focused (focal position ahead of the workpiece surface) as the overlapping weld is made.

Abstract: A wire-feeding electromagnetic spray additive manufacturing device and method are provided. The device includes a housing, an alternating current power box is fixedly installed on the housing, and a stirring needle is also arranged in the housing. The device further includes a fixed seat fixedly installed in the housing, and a heating coil is arranged between the fixed seat and the stirring needle; a lower end of the stirring needle is provided with spinnerets and heating channels adapted with corresponding the spinnerets respectively; upper ends of the heating channels penetrate through the stirring needle and are fixedly connected with the housing, and an extrusion assembly is fixedly installed on each of the heating channels; and a smoke pipe is fixedly installed on the extrusion assembly, and an upper end of the smoke pipe penetrates through the housing and is connected with a negative pressure fan.

Abstract: A sputter measurement system includes: a camera that captures an image of an observation region including a molten portion that is melted during welding; a telecentric lens disposed between the molten portion and the camera; and a controller that measures a size of a sputter flying from a molten portion based on an image captured by the camera.

Abstract: In order to implement a stage device for an optical instrument capable of accurately directing the optical instrument to a desired target position on an object supported by a moving stage, a stage device 2 for an optical instrument includes a table 22 configured to support an object and to move together with the object to cause an optical instrument 1 to be directed to any portion of the object; and a detection mechanism configured to detect a deviation between a target position to which the optical instrument 1 is to be directed on the object supported by the table 22 and a position to which the optical instrument 1 is actually directed.

Abstract: The invention relates to an optical writing method in a semiconductor material (10), the method comprising laser writing in volume of the semiconductor material. The method comprises, prior to laser writing, irradiating the semiconductor material (10) with at least one laser pre-pulse configured to change transiently and locally one property of the semiconductor material (10).

Abstract: A device for processing a workpiece using a laser beam of a laser includes a retarder plate and a focusing device. The retarder plate is configured to apply a first location-dependent phase retardation to a first part of the laser beam having a first input polarization, and to apply a second location-dependent phase retardation to a second part of the laser beam having a second input polarization. The focusing device is configured to focus the laser beam in at least one focus zone. A beam form of the laser beam in the focus zone is determined by the first location-dependent phase retardation and the second location-dependent phase retardation. The at least one focus zone at least partially overlaps with the workpiece. The workpiece is subjected to laser radiation in the at least one focus zone and is thus processed.

Abstract: A method for creating a pattern figure formed of pattern points, in a workpiece, using a laser device of a machining device comprises reading in first position data, which define positions of first pattern points on the workpiece, wherein the first pattern points are associated with a first portion of a polyline of the pattern figure associated with the first pattern, introduction of the first pattern points into the workpiece taking place while the machining device is located in a first position, a detection of a course of an end of the first portion of the polyline, a continuation of the course of the end of the first portion of the polyline, and an introduction of second pattern points of a second portion of the polyline into the workpiece using the continued course, while the machining device is in a second position.

Abstract: A laser processing apparatus and a processing method thereof has a laser generator, a stage, a galvo mirror module, a focusing lens module, and a controller. The controller has an arithmetic logic unit for stratifying multiple targets at a substrate into multiple beam path layers. The stage is controlled by the controller to move along a first axis forwardly and backwardly. During each of forward movements and backward movements of the stage, the laser generator and a galvo mirror module are controlled by the controller according to a respective one of the beam path layers for processing the targets stratified in the beam path layer. All the targets at the substrate are processed in sequence while the stage is continuously moving along the first axis forwardly and backwardly. The substrate can be rapidly processed with good processing quality.

Abstract: A double nozzle for a laser processing head includes an inner body portion having an interior surface defining a bore for passing a laser beam, a first interface surface near a distal end of the inner body portion, the first interface surface including a plurality of channels, and an exterior surface near a proximal end of the inner body portion and shaped to engage the laser processing head. Each channel includes interior and exterior linear edges in a cross-section that passes though a central longitudinal axis of the double nozzle. The double nozzle also includes an outer body portion connected to the inner body portion. The outer body portion defines a jet surface, which together with the plurality of channels defines a corresponding plurality of auxiliary fluid flow paths about the bore and between the inner body portion and the outer body portion.

Abstract: An example additive manufacturing apparatus includes an energy source to melt material to form a component in an additive manufacturing process, a camera aligned with the energy source to obtain image data of the melted material during the additive manufacturing process, and a controller to control the energy source during the additive manufacturing process in response to processing of the image data. The controller adjusts control of the energy source based on a correction determined by: applying an artificial intelligence model to image data captured by a camera during an additive manufacturing process, the image data including an image of a melt pool of the additive manufacturing process; predicting an error in the additive manufacturing process using an output of the artificial intelligence model; and compensating for the error by generating a correction to adjust a configuration of the energy source during the additive manufacturing process.

Abstract: A processing method for a workpiece includes applying to the workpiece a pulsed laser beam that causes ablation to thereby generate plasma light and generate a first distribution pattern, the beam having a wavelength and intensity of light intrinsic to the workpiece substance, the beam being used to find and set appropriate processing conditions for processing the workpiece; recording the first distribution pattern and the processing conditions in a linked manner; applying the beam to the workpiece to generate plasma light; generating a second distribution pattern including a wavelength and intensity of light intrinsic to the workpiece substance, according to the plasma light; collating the second distribution pattern and the first distribution pattern to thereby select a third distribution pattern having a degree of similarity in a predetermined range; and processing the workpiece in reference to processing conditions linked to the third distribution pattern.

Abstract: Apparatus (10) for laser processing a material (11), which apparatus comprises a laser (1) and a beam delivery cable (2), wherein: the laser (1) is connected to the beam delivery cable (2); the beam delivery cable (2) is configured to transmit laser radiation (13) emitted from the laser (1), and the laser radiation (13) is defined by a beam parameter product (4); and the apparatus (10) is characterized in that: the apparatus (10) includes at least one squeezing mechanism (5) comprising a periodic surface (6) defined by a pitch (7); a length (8) of optical fibre (9) that forms part of the laser (1) and/or the beam delivery cable (2) is located adjacent to the periodic surface (6); and the squeezing mechanism (5) is configured to squeeze the periodic surface (6) and the length (8) of the optical fibre (9) together with a squeezing force (12); whereby the beam parameter product (4) is able to be varied by adjusting the squeezing force (12).

Abstract: This non-provisional application is a continuation-in-part application filed under 37 CFR 1.53(b) that claims the benefit of United States 35 USC 120 from non-provisional application with U.S. application Ser. No. 18/237,911 filed on Aug. 25, 2023, and from non-provisional application with Pub. No. US 2022/0258277 A1 filed on Feb. 12, 2021. This invention discloses an apparatus of processing object in optical turbid medium using multibeam interference. This invention creates the apparatus having important usages, such as medical no incision laser surgery with deep treating depth, underwater wireless long-distance communication, small attenuation light energy delivery in optical turbid medium. The disclosed apparatus has excellent performance. For example, the created laser scalpel can treat tissue at depths of more than 5 cm in human body with high 3D precision of about 1 ?m.

Abstract: Disclosed is a method for manufacturing chips by removing, from a workpiece with devices formed on a side of its front surface, first to-be-removed portions located around the devices and second to-be-removed portions located on a side of its back surface with respect to the devices. This method includes an internal processing step of irradiating the first to-be-removed portions with a laser beam to form modified regions there, and cracks spreading from the modified regions such that each crack reaches corresponding one of the second to-be-removed portions through corresponding one of intermediate portions located between the devices and the second to-be-removed portions, a first removal step of removing the first to-be-removed portions, and a second removal step of grinding and removing the second to-be-removed portions and using the cracks as boundaries to separate, from the chips, their back surface side peripheral edge portions.

Abstract: A gear box having a carburized shaft and steel bearing assembly. The bearing includes an inner-race and an outer-race. The shaft includes a distal end surface extending perpendicularly from a shaft faying surface and a shaft annular beveled edge. The shaft faying surface is in intimate contact with the inner-race. The inner-race second annular face is coplanar with the distal end surface. The shaft annular beveled edge cooperates with the inner-race faying surface to define a half-V shaped groove. An annular weld joint is formed in the half-V shaped groove thereby joining the shaft to the inner-race. The outer-race includes a first width (W1) and the inner-race includes a second width (W2). W2 is wider than W1 by greater than 0 millimeters (mm) to about 10 mm.

Abstract: Disclosed example travel speed pacing systems for welding-type operations include: an interface configured to receive an input describing a characteristic of a welding-type operation; and control circuitry configured to: determine a target travel speed based on the input; determine a target time interval at which the welding-type operation is to traverse locations corresponding to successive ones of a plurality of marked locations on the workpiece of the welding-type operation, the target time interval being based on the target travel speed and a unit distance between the marked locations; and control the interface to output indicators representative of a target time interval.

Abstract: A solder alloy consisting of Ag: 3.1 to 4.0% by mass, Cu: 0.6 to 0.8% by mass, Bi: 1.5 to 5.5% by mass, Sb: 1.0 to 6.0% by mass, Co: 0.001 to 0.030% by mass, Fe: 0.02 to 0.05% by mass, As: 0.002 to 0.250% by mass, and a balance Sn.

Abstract: A tube clamp arrangement includes a first mounting plate and a second mounting plate. The first mounting plate is configured to join together a first tube-holding assembly and a first adjustment mechanism, where the first adjustment mechanism is configured to move in a first direction in a first plane. The second mounting plate is configured to join together a second tube-holding assembly and a second adjustment mechanism, where the second adjustment mechanism is configured to move in a second direction in the first plane.

Abstract: A welding positioning fixture includes a support device, two first lateral-pressing devices and a downward-pressing device. Two battery modules float along a first direction, the two first lateral-pressing devices are pressed on the first sides of the battery modules respectively, and the downward-pressing device is used for positioning the battery modules along the first direction. Each first lateral-pressing device has a first positioning surface. When the first positioning surfaces of the two first lateral-pressing devices are moved to the same preset height, and a second positioning surface is pressed on top sides of the two battery modules, the two battery modules can float in the first direction so that the hanging lug of each battery module abuts against the corresponding first positioning surface.

Abstract: An arc welding process is disclosed. In one example, the process comprises arranging an electrode at the front of a joining gap formed by joining partners contacted with opposite poles to the electrode; arranging a pair of magnetic poles at the rear or top of the joining gap and substantially centered with respect to the front electrode surface; generating the arc such that the joining partners form a welding zone comprising a weld pool with substantially simultaneous induction of a low-frequency oscillating magnetic field between the pair of magnetic poles; progressively moving the electrode along the joining gap to move the weld pool between the joining partners, leaving behind a weld seam, with synchronous entrainment of the low-frequency oscillating magnetic field. A magnetic flux density of the low-frequency oscillating magnetic field is selected such that an induced Lorentz force supports the weld pool and prevents escape from the joining gap.

Abstract: The present disclosure provides repair systems, repair components, and methods for repairing composite structure systems. The repair systems include using a set number of prefabricated repair components which are fabricated to repair multiple composite members in a composite structure system.

Abstract: Axial relative movement of an auxiliary member (30) and a hub body (22z) is performed, the hub body (22z) and an inner race (21) are combined with each other in an axial direction, and a part of the hub body (22z) deformed by a blade (33) of the auxiliary member (30) is disposed inside an engagement concave portion (26) of the inner race (21).

Abstract: A device for automated production of screw connections includes an industrial robot with an output member rotatable about an effector axis (W) relative to an end member. A screwing unit is at least indirectly connected to the output member and rotatable by the output member about the effector axis (W). A screwing tool, a protective sleeve, and a preload spring are also included. The screwing tool is: accommodated at least in sections inside the protective sleeve; torque-proof connected with the protective sleeve; and axially displaceable along the effector axis (W) relative to the protective sleeve between a screwing position and a safety position. The screwing tool is biased in the screwing position by the preload spring.

Abstract: A main spindle device for a machine tool including a rotary joint configured by a distributor fixedly provided to a frame and a shaft provided to be non-rotatable to a main spindle. The rotary joint is configured by a first rotary joint part and a second rotary joint part that are continuous in an axis line direction of a main spindle. The first rotary joint is the other end side of the frame and is configured by a first distributor having a shaft shape and a first shaft having a cylindrical shape, and the second rotary joint is configured by a second distributor having a cylindrical shape and a second shaft having a shaft shape.

Abstract: A lead supply system according to an embodiment of the present invention may supply the lead so as to be connected to an electrode tab. The lead supply system may include: a seating part on which the lead is seated; a vision sensor that photographs the lead at an upper side of the seating part; an alignment mechanism that adjusts the seating part so as to align the lead on the basis of vision data photographed by the vision sensor; and a supply device that picks up the lead from the seating part so as to supply the lead to a position at which the lead is connected to the electrode tab.

Abstract: In the disclosure, a plate-shaped fixing cover (30) is fixed to a lower part of a main shaft head (6). The fixing cover (30) protects a moving mechanism inside a column (5) from chips and the like. When the main shaft head (6) is positioned at an uppermost end of a movement range, a moving cover (40) covers and protects a portion of the column (5) that is exposed and not covered by the fixing cover (30). When the main shaft head (6) moves to the bottom end of the movement range, the moving cover (40) abut against the engagement projections (55A, 55B) and is restricted from moving downward. As the main shaft head (6) descends, the moving cover (40) moves upward relatively with respect to the fixing cover (30) and is housed on a back surface side of the fixing cover (30).

Abstract: Apparatus for sharpening a cutting tool. In some embodiments, a tool sharpener includes an abrasive medium having an abrasive surface. A stationary tool support guide provides a guide surface that supports a side of the tool during presentation of a cutting edge of the tool against the abrasive surface. A rotatable edge guide has a roller member with a curvilinearly extending outer surface. The roller member is rotatable about an edge guide roller axis to engage, via rolling contact, the cutting edge during the presentation of the cutting edge against the abrasive surface.

Abstract: An apparatus for feeding, grinding, and sorting a woodworking knife may include a guide track system with a lugged endless loop for moving woodworking knives along a flow path through a grinding assembly, and optionally to a rotary sorting station. Corresponding systems and methods for feeding, grinding, and sorting a woodworking knife are also disclosed herein.

Abstract: The invention relates to a polishing tool (100) for polishing a spectacle lens (L) in a surface machining process, which comprises a tool body (110) for being rotatably supported about a rotational axis (RA1). The tool body (110) comprises a polishing surface (130) being outwardly exposed at a first axial end (101) of the tool body (110). Therein, the polishing surface (130) is axially bulged convexly or concavely with respect to the rotational axis (RA1) for polishing an optical surface (L1, L2) of the spectacle lens (L). The tool body (110) further comprises a channel (140) that extends axially through the tool body (110) from an inlet (142) to an outlet (141) to supply the polishing surface (130) with a polishing agent. The inlet (142) is provided at a second axial end (102) being opposite to the first axial end (101) with respect to the rotational axis (RA1). The outlet (141) is provided at the first axial end (101).

Abstract: The present invention provides, in one aspect, a rotating power tool including a housing, a drive unit within the housing having an electric motor defining a rotational axis, and a drive shaft coupled to the electric motor to receive torque therefrom configured to rotate about the rotational axis, the drive shaft having an eccentric portion. The drive unit further includes an accessory tool configured to orbit about the rotational axis in response to rotation of the eccentric portion of the drive shaft, the accessory tool defining a rotational imbalance. The rotating power tool further includes a dynamic mass balancing system including an actively adjustable counterbalance mass to attenuate vibration caused by the rotational imbalance.

Abstract: A random orbital sanding tool includes a power motor, a driving spindle connected to the power motor, an eccentric block connected to the driving spindle, a tool holder disposed on the eccentric block, and a sanding pad connected to the tool holder and indirectly driven by the power motor. The random orbital sanding tool includes a friction member disposed on the eccentric block, the friction member contacts the sanding pad. The friction member has a first state of providing a pre-pressure to the sanding pad when the power motor is not activated, a second state of displacing with the eccentric block and deforming with revolving of the sanding pad when the power motor is activated, and a third state of providing a braking force to the sanding pad when the power motor stops running.

Abstract: A carrier head for chemical mechanical polishing includes a housing for attachment to a drive shaft, a membrane assembly beneath the housing with a space between the housing and the membrane assembly defining a pressurizable chamber, and a sensor in the housing configured to measure a distance from the sensor to the membrane assembly.

Abstract: To accurately detect a polishing end point even if a change in a polishing frictional force is small. A polishing apparatus includes a polishing table for holding a polishing pad, a holder for holding a polishing target object such that the polishing target object faces the polishing pad, and an end point detector that detects, based on a signal indicating a state of polishing of the polishing target object by the polishing pad, a polishing end point indicating an end of the polishing. The end point detector is configured to remove noise of the signal, exponentiate the signal subjected to the noise removal with an exponent greater than 1, and detect the polishing end point based on the exponentiated signal.

Abstract: A chemical mechanical polishing system includes a platen to support a polishing pad, a carrier head to hold a substrate in contact with the polishing pad, a motor to generate relative motion, a steam generator, and an arm extending over the platen with and at least one opening to deliver steam from the steam generator onto the polishing pad. The steam generator includes a canister, a barrier in the canister dividing the canister into a lower chamber having a water inlet and an upper chamber having a steam outlet, a heating element configured to apply heat to a portion of lower chamber, and a nucleation surface positioned in the lower chamber. The barrier has apertures for steam to pass from the lower chamber to the upper chamber and allows for condensation to pass from the upper chamber to the lower chamber.

Abstract: A method of performing a polishing process is provided. The method may include forming spherical titanium dioxide nano-particles, covering the spherical titanium dioxide nano- particles with an organic coating, storing the spherical titanium dioxide nano-particles together with an oxidizer, forming a polishing solution with the spherical titanium dioxide nano-particles, applying the polishing solution on a surface of a work piece, and polishing the surface of the work piece with the polishing solution.

Abstract: The polishing pad according to an embodiment has a chlorine content adjusted to a certain range, whereby it is possible to reduce the size of debris while maintaining excellent physical properties and performance of the polishing pad, thereby minimizing the occurrence of defects and scratches during a chemical mechanical polishing (CMP) process.

Abstract: A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used.

Abstract: The invention relates to a power tool apparatus which is provided to perform an abrasion work operation on a workpiece, said apparatus including at least one spindle which is driven to rotate and a plurality of abrasion components which can be selectively attached to the spindle, said abrasion components provided in different configurations to perform different work operations and selectable by the user with regard to the particular work operation to be performed on a workpiece at that time. The speed of rotation of the spindle is manually or automatically adjustable so as to allow the speed of rotation of the abrasion component to be optimised with regard to the particular work operation to be performed. In one embodiment, the said speed of rotation is one of a range of predetermined speeds which can be manually selected by the user via user actuation means or may be automatically set upon detection of a particular component being fitted to the spindle at an instant of time of use.

Abstract: A device for polishing an optical lens or an optical mirror, using a liquid polishing agent, has a workpiece carrier for establishing at least a first surface of the optical lens or of the optical mirror. The workpiece carrier has a porous and elastic lining for establishing the at least one first surface of the optical lens or of the optical mirror, and the lining is configured as a lining that is permeable for the polishing agent. Furthermore, a method polishes an optical lens or an optical mirror.

Abstract: A diamond tool is combined with a processing apparatus to process a workpiece. The diamond tool includes a shank, a segment, and an abrasion preventing part. The shank has a throughhole through which grinding powder generated during processing the workpiece by the processing apparatus is discharged outside. The segment is bonded to an end portion of the shank. The segment contacts and processes the workpiece. The abrasion preventing part is disposed on an adjacent portion among an outer surface of the shank adjacent to the throughhole to prevent abrasion of the outer surface during the processing of the workpiece.

Abstract: A method of forming a cutting element includes forming a supporting substrate comprising a homogenized binder and a mixture of coarse tungsten carbide (WC) particles and fine WC particles, depositing discrete diamond particles on the supporting substrate, and sintering the supporting substrate and the diamond particles to form a cutting table comprising inter-bonded diamond particles attached to the supporting substrate. A ratio of a particle size of the coarse WC particles to a particle size of the fine WC particles is within a range of from about 2:1 to about 50:1. The mixture of coarse WC particles and fine WC particles include between about 60% by volume (vol %) and 95 vol % coarse WC particles and between about 5 vol % and 40 vol % fine WC particles. Cutting elements so produced and earth-boring tools including such cutting elements are also disclosed.