2026 results about "Electrical discharge machining" patented technology

A face portion 11 of a golf club head 10 is obtained press-forming a metal plate into a predetermined shape. On the front surface 11a of the face portion 11, score lines 12 are formed by means of die sinking of electrical discharge machining, and a mirror finished surface portion 13 is formed by means of finish processing of electrical discharge machining. On the rear surface 11b of the face portion 11, a rib structure 15, and a high hardness layer 16 of an amorphous metal layer are formed. The electrical discharge machining is numerically controlled.

A method of forming a device, such as an electrode array for a cochlear implant. The method comprises a step of forming a predetermined pattern of relatively electrically conductive regions and relatively electrically resistive regions in a sheet of biocompatible electrically conductive material, such as platinum foil. The method can comprise a step of working on the sheet to remove predetermined portions therefrom to form the one or more discrete relatively conducting regions. The step of working on the sheet can comprise embossing the sheet, cutting or slicing the sheet, or using electrical discharge machining (EDM) to remove unwanted portions of the sheet, the EDM equipment having a cutting tool comprising an electrode.

A direct-metal deposition (DMD) processing stage and a 5DOF (degree of freedom) dry micro-EDM (mEDM) stage are integrated to provide the submicron scale resolution necessary for the ultra-precision processing of work pieces. The DMD processing stage includes optical feedback for dimensional control utilizing a high-power, fiber-coupled diode laser with fast response time and small beam parameter product. The electrical discharge machining (EDM) stage is a dry EDM stage using an inert gas with appropriate dielectric properties to perform the surface finishing operations. The system further includes one or more surface treatment operations to obtain a desired level of surface hardness or wear resistance and / or to minimize the distortion induced in treating the surface.

This invention describes a rapid tooling process that integrates solid freeform fabrication (SFF) with electroforming to produce metal tools including molds, dies, and electrical discharge machining (EDM) electrodes. An SFF part is metalized by electroless plating and then placed in an electroplating solution, where metal is deposited upon the part by electrolysis. When the desired thickness of metal has been reached, the SFF part is removed from the metal shell. The shell is then optionally backed with other materials to form a mold cavity, and EDM electrode, or other desired parts for tooling. Thermomechanical modeling and numerical simulation with finite element analysis (FEA) is used to determine the geometry of the SFF part and the electroform thickness for minimizing the manufacturing time and cost while satisfy the tooling requirement.

The invention discloses a picosecond pulse laser cutting preparation method for a grid-control traveling wave tube grid mesh. The method comprises the following steps of performing cleaning, hydrogen burning and annealing on a grid mesh material, then pressing the grid mesh material through a die on a punching machine to form a spherical grid mesh blank with high curvature radius precision, performing destressing hydrogen burning on the blank to eliminate stress during processing to guarantee the stability of the curvature radius of a spherical cap of a grid mesh, and finally cutting the grid mesh by adopting picosecond pulse laser of an optimized technology to prepare the grid-control traveling wave tube grid mesh with high size precision and high consistency. According to the preparation method for the grid mesh of a grid-control traveling wave tube, specific technical parameters of picosecond laser cutting are screened through a large number of experiments, the operability is high, the technical design is reasonable, and the application range is large; the prepared grid mesh is high in size precision, high in consistency, high in yield and high in reliability and has an important application value; the shortcoming of an existing electric spark grid mesh processing technology can be effectively overcome.

According to the present invention, since the concavo-convex pattern of the embossing form is formed by electrical discharge machining, the peaks on the surface of the resultant embossing form are all of the same level or height, which enables the enhancement of the service life of the embossing form. Further, since the concavo-convex pattern of the embossing form is formed by electrical discharge machining, even a complicated and minute concavo-convex pattern can be formed. Accordingly, when applying the method of the present invention to, for example, the production of a substrate for a lithographic plate, an aluminum substrate for a lithographic plate which excels in plate wear, sensitivity and resistance to stains can be produced. And when applying the same to the production of an aluminum decorative laminate, an aluminum decorative laminate which excel in glossiness and paint adhesion can be produced.

A primer-fired ammunition cartridge for an electrical discharge weapon having a housing with an exterior surface and two wire-tethered darts positioned within dart chambers in the housing and two electrical contacts positioned on opposite surfaces of the housing for lengthening an electrical arc path across the exterior surface of the housing. The housing can include a flange portion for engaging a chamber in an electrical discharge weapon wherein the flange portion includes an aperture thereby allowing the flange portion to bow and absorb resultant forces between the ammunition cartridge and the chamber of the electrical discharge weapon during firing of the cartridge.

The invention relates to a micro and fine machining method for a material difficult to machine and a machining system, belonging to the technical field of composite, precise, micro, fine and special machining. In the method and the machining system for implementing the method disclosed by the invention, ultrasonic modulation, low-voltage discharge and electrolysis are effectively compounded, a micro and fine discharge-electrolysis function is organically combined with ultrasonic frequency vibration identical frequency and synchronization, and discharge of machining products and circular update of a working fluid are realized under the actions of ultrasonic cavitation and spark discharge explosive force, so that a gap machining process is improved effectively, localized machining performance is enhanced, machining accuracy and surface quality can be further enhanced while high machining efficiency is achieved, machining can be realized in a static fluid simultaneously, and complex pressure flow and circular supply of the working fluid to the system is not required; and during processing, contact of the workpiece with an electrode under a certain constant pressure is kept, continuous and stepless micro pressure adjustment can be performed by using a magnetic adjusting mechanism, and a precision stable-speed micro feeding system necessary for electrolytic machining and a servo feeding system necessary for electric spark machining are not required, so that the equipment research cost can be reduced greatly.

A method of manufacturing a collimator including providing a plate-like body, coating a predetermined portion of a surface of the body with an x-ray absorbing material, and machining at least one collimating slit through the coating and the plate-like body. According to one exemplary embodiment, the coating is applied through a thermal spray process. According to another exemplary embodiment, wire electrical discharge machining (EDM) is used to machine the collimating slits. A collimator manufactured in accordance with the presently disclosed method produces precise energy beam cross-sections, yet is less expensive to manufacture.

The invention relates to filter paper for a cooling system in wire electrical discharge machining (WEDM), which comprises the following components in percent by weight: 18-25 percent of phenolic resin, 0.5-5 percent of glass fiber, 0.5-5 percent of polyester fiber and 65-82 percent of wood pulp fiber. A production method of the filter paper comprises the steps of pulping, pulp mixing, paper making, drying, glue setting and forming. The filter paper adopts the wood pulp fiber as the main material which is matched with a proportion of glass fiber and polyester fiber, so that the bore diameter of the filter paper can be reduced, and the filtering accuracy can be improved; and in addition, since the polyester is chemically-synthesized fiber and has high strength, the bursting strength of the filter paper is improved, and the service life of the filter paper is prolonged. In the production process of the filter paper, thermosetting phenolic resin is introduced by dipping setting glue, and the size stability, the high temperature resistance and the water resistance of the filter paper are further improved. When being applied to a cooling liquid circulating system in WEDM, the filter paper is not deformed or expanded and has good strength in water, and the phenomena of water jetting and black water generating due to bursting are avoided.

The invention provides a synchronous composite processing method of micro-hole electric sparks and different electrolytic areas and a special tool of the synchronous composite processing method. The synchronous composite processing method includes that a tube electrode is switched to impulse voltage, and a neutral salt solution with ultra-low concentration flows into a processing area via the inner side of the tube electrode at a high speed, and then flows out of the processing area along a gap between the tube electrode and a workpiece; an end face of the tube electrode is subjected to high-speed punch processing with axial feeding of electric sparks under the ultra-low concentration of the neutral salt solution, and a hole wall processed by the electric sparks is subjected to radical electrochemical finishing and machining under the action of low-pressure voltage. By the synchronous composite processing method, processing precision is guaranteed, punching efficiency is improved, and processing requirements on various kinds of holes of an aircraft engine are met. Different from conventional electric spark processing and electrolytic processing, the synchronous composite processing method adopts the neutral salt solution with the ultra-low concentration, so that processing efficiency in electrochemical dissolution can be greatly improved and corrosion degree of equipment can be decreased.

The invention belongs to the technical field of small hole electric machining and particularly relates to a machining method of a gravity-free smelting layer air membrane hole of an aviation engine turbine blade. The machining method comprises four steps: firstly, machine a circular hole with a needed size a nickel-based high-temperature alloy blade on a gas turbine by utilizing washing liquid electric sparks in a hollow electrode according to a design requirement; then utilizing the same electrode to electrolyze the machined circular hole in an electrolyte environment of an outer washing solution to remove a re-smelted layer; then, raising the electrode and utilizing an electric spark servo scanning and milling and machining process to machine a dustpan-shaped hole opening of the air membrane hole; and finally, utilizing the end part of the electrode to carry out electrolytic milling machining on the dustpan-shaped hole opening to remove the re-smelted layer of the hole opening so as to improve the surface quality. According to the machining method disclosed by the invention, the problem of a residual re-smelted layer and small cracks of the air membrane hole machined by the electric sparks can be solved, a secondary clamping and positioning error is avoided and the machining efficiency is improved.

An electrical discharge machine includes first and second coaxial electrodes and corresponding carriages. A liquid dielectric is channeled between the electrodes and a workpiece which are suitably electrically powered for machining a duplex hole in the workpiece.

The invention concerns the use of a WC-Co cutting metal alloy for a component or a tool insert, which is shaped from a corresponding cutting metal blank by means of an electrical discharge processing method. The WC fraction in the carbide phase of the cutting metal alloy is more than 90 wt %; the binder phase consists mostly of cobalt and is 8 to 15 wt % with reference to the cutting metal alloy. 0.1 to 3 wt % of one or more metals from the group Re, Ge, Ga, Ir, Os, Pd, Ag, Au, Pt, Te, Sb, Rh, and Ru, with reference to the binder phase, are dissolved in the binder phase.

The invention relates to the technical field of insulating ceramics machining. In order to solve the problems that the conventional insulating ceramic machining method and device are low in machining accuracy and low in quality of the machined surface, the invention provides a method for machining insulating ceramic by reciprocating wire-cut electrical discharge machining. The method comprises the following steps of: immersing insulating ceramics of which the outer surface is fixed with an auxiliary electrode in electrospark liquid or kerosene working solution; putting a wire electrode into the working solution, connecting the auxiliary electrode and the wire electrode to the anode and cathode of a high-frequency pulse power supply respectively, and controlling the distance between the auxiliary electrode and the wire electrode until electrical discharge can be realized; and controlling relative motion between the wire electrode and the insulating ceramics according to the machining requirement. The invention also provides a device, wherein the insulating ceramics of which the outer surface is fixed with the auxiliary electrode and the wire electrode are arranged in the electrospark liquid or kerosene working solution and are connected with the anode and cathode of the high-frequency pulse power supply respectively; and the insulating ceramics are fixed on a work table and are driven by the work table to move. The method is stable in machining process and favorable for popularization and application.

The present invention relates to machining technology, and is especially one voltage regulating energy saving spark machining pulse power supply. The pulse power supply includes rectification and filtering circuit, voltage regulating circuit, pulse converting and power amplifying circuit, voltage and current detecting circuit, pulse triggering circuit and PWM control circuit. The pulse power supply can provide no-load puncture voltage of about 100 V to the machining spark interval before puncture and machining maintenance voltage of about 25 V to the machining spark interval after puncture, and has the features of adaptive voltage regulation and equal current pulse width. The present invention can realize the independent regulation of pulse voltage, pulse width and pulse interval in wide ranges, and has no current limiting resistor with high power consumption and thus 2 times raised electric energy utilization rate.

A cartridge for propelling a pair of wire-tethered contact darts for disabling a remote target with an electrical discharge. The cartridge comprises two bores each having one wire-tethered dart in front of an electrically activated pyrotechnic. A cartridge contains two separated straight bores, which each launch a single dart assemblage with a single primer of standard manufacture. A single 200 large rifle primer can launch a single dart assemblage reasonably accurately to 30 feet from the cartridge. Each assemblage is deflected to a predicted angle of flight when it collides with a center hinged cover as it exits the cartridge. This arrangement allows for longer flight distances and tighter, but still effective, dart spreads throughout the travel.

The invention discloses an electric spark induction controllable erosion and electrolysis compound efficient machining method which is characterized by comprising the steps of: with electrolyte as a working medium, immersing one end of a to-be-machined workpiece electrode and a tool electrode in the working medium, intermittently introducing air to a machining area and forming an air film between the to-be-machined workpiece electrode and the tool electrode; generating electric spark discharge between the to-be-machined workpiece electrode and the tool electrode under the action of an electric spark power supply to ensure that the to-be-machined workpiece generates an oxidation exothermic reaction with the introduced air under the action of electric spark discharge ignition and forms a burning effect so that efficient ablation is realized; in an air closed stage, carrying out electrochemical machining and surface dressing on the ablation surface under the action of an electrolysis power supply; and alternating to start an electric spark ignition pulse power supply and an electrolysis eroding power supply and moving the tool electrode until machining is finished. The invention has the advantages of high material eroding efficiency up to be several times, even tens of times of that of the conventional electric spark machining and also be higher than that of the conventional electrolysis machining under the same electrical parameters on the premise of ensuring machining quality and precision, good surface quality, precision and controllability and capability of eliminating surface residual stress.

A method of forming a device, such as an electrode array for a cochlear implant. The method comprises a step of forming a predetermined pattern of relatively electrically conductive regions and relatively electrically resistive regions in a sheet of biocompatible electrically conductive material, such as platinum foil. The method can comprise a step of working on the sheet to remove predetermined portions therefrom to form the one or more discrete relatively conducting regions. The step of working on the sheet can comprise embossing the sheet, cutting or slicing the sheet, or using electrical discharge machining (EDM) to remove unwanted portions of the sheet, the EDM equipment having a cutting tool comprising an electrode.

Automated handling systems and methods for using the handling systems for handling a work piece in a machining process, for example, an electrical discharge machining (EDM) process, are provided. The handling systems include a robotic manipulator adapted to grasp a work piece and locate the work piece in a machining operation, such as, an EDM machining operation. The robotic manipulator includes tooling having gripping devices adapted to grasp and position the work piece so that the work piece can be transferred and positioned, for example, precisely positioned, whereby accurate machining of the work piece can be practiced with little or no custom tooling. Methods for handling a work piece are also disclosed.

Disclosed is a polyfunctional hydrocarbon oil composition containing a hydrocarbon oil which has a density at 15 DEG C of 0.7-0.8 g / cm<3>, while having an n-paraffin content of 10-90% by mass, an aromatic content of 0-3% by volume and a naphthene content of 0-20% by volume. Also disclosed is a metalworking oil composition, electrical discharge machining oil composition, rust preventive oil composition and cleaning composition, each composed of the hydrocarbon oil composition. The hydrocarbon oil composition is improved in safety such as volatility, inflammability, odor and skin irritation as well as working environment, and performs many functions.

A method for fabricating a leadframe for a QFN / SON semiconductor device by selecting (301) a strip of a first metal as the leadframe core, then plating (302) a layer of a second metal over both surfaces of the strip, then cutting (304) a pattern from the pre-plated strip and further removing (304) portions of the second metal layer over a surface to expose the underlying core first metal. The exposed core first metal oxidized (305) before using (306) the leadframe for assembling the semiconductor device. The steps of cutting and removing are performed programmable machining techniques such as computer numerical controlled tools (CNC), electrical discharge machining (EDM), laser cutting, and water jet cutting.

A method of cutting out a part from a workpiece with making partially welded spots in wire electrical discharge machining to keep the part against falling apart away from the workpiece. There is no need to cut anew the welded spot left as in the conventional process. The cut-out parts are cut off at a time after breakage of the welded spots caused by an external impact. The electric processing condition applied across an inter-electrode space between the wire electrode and the workpiece is changed from a cutting phase to a welding phase in which the wire electrode is fused partially at some spots along a cutting path of a predetermined contour on the workpiece to weld together the cut-out part and the workpiece at the fused spot on the wire electrode.

The invention discloses a system and a method for processing a micro conical bore by rotation of a laser beam. The system comprises a laser generating unit, a laser deflection unit, a laser rotating unit, a taper control unit and a laser processing unit; the laser generating unit is used for generating a beam of short-pulse laser and sending the short-pulse laser to the incident end of the laser deflection unit; the laser deflection unit is used for sending the short-pulse laser to the incident end of the laser rotating unit by the exit end of the laser deflection unit after carrying out deflection on the short-pulse laser; the laser rotating unit is used for rotating the laser beam and transmitting the laser beam to the incident end of the taper control unit by the exit end of the laser rotating unit; and the taper control unit is used for correcting a horizontal distance between the laser beam and an optical axis and then transmitting the laser beam to a processed workpiece on the laser processing unit by the exit end of the taper control unit. The invention can overcome the technical defects of conventional processing means of processing a fine round hole in a mechanical and electric spark manner and the like and completely avoids the defects of a great number of burrs, difficulty in control on the accuracy, poor reliability and the like of a current fine conical bore.

The invention belongs to the field of combined micro-machining and discloses an efficient micro-machining method and device for a non-conductive crisp and hard material. According to the machining method, ultrasonic vibration, electrolyzing, electric sparks, high-speed drill milling and other machining methods are organically combined to complete machining of non-conductive microstructures. In other words, a workpiece, a tool electrode and an auxiliary electrode are immersed into an electrolyte; the auxiliary electrode and the tool electrode are subjected to an electrolytic reaction; hydrogen evolution happens to the surface of the tool electrode connected with a negative electrode, and an insulation air film is formed; generation and homogenizing of the air film on the surface of the tool electrode are facilitated under the cavatition effect of ultrasonic vibration; and during machining, the tool electrode and the electrolyte on the surface of the workpiece generate spark discharge to puncture the air bubble film, and therefore a high-temperature erosion non-conductive workpiece material is generated. The machining device comprises a machine tool bed, an electrolysis-electrical discharge machining unit, an ultrasonic vibration worktable and a feeding worktable. Due to high-speed rotation of the spiral tool electrode and ultrasonic vibration of the workpiece, a clearance flow field can update the electrolyte efficiently. The efficient micro-machining method and device have the beneficial effects that efficiency and precision are high, and cost is low, and the efficient micro-machining method and device are very suitable for micro-machining of the non-conductive hard and crisp materials.

A method for cleaning a casing of an oil well is disclosed. Operational parameters for a cleaning tool may be defined based, at least in part, on results of a survey of the well. The cleaning tool may include a discharge head to generate electrical discharges between a pair of electrodes, the electrical discharges causing shock waves to remove deposits from the casing. The cleaning tool may be lowered into the casing. The cleaning tool may generate shock waves in accordance with the defined operational parameters to clean a predetermined target portion of the casing. The cleaning tool may be withdrawn from the casing.

A system to manufacture orthodontic appliances, program product, and associated methods are provided. An embodiment of a system can include a virtual orthodontic appliance design computer having orthodontic appliance design program product provided to design a virtual dimensional representation of an orthodontic appliance including bracket bodies and bracket pads, and a mold apparatus positioned to form each bracket body and bracket pad. The system also includes a data processing computer including computer-aided manufacturing program product provided to derive electrical discharge device control instructions including a virtual dimensional representation of a bracket slot in the bracket, and an electrical discharge machining apparatus. The electrical discharge machining apparatus can include a controller including control program product to derive a control signal carrying the electrical discharge device control instructions and an electrical discharge device.