46 results about "Electrical discharge machining" patented technology

The utility model discloses a numerical control electric spark discharge processing machine, include: electric spark processing machine tool is provided with the bottom plate in, the bottom plate bottom is provided with the second electric push rod, and the lifting end of second electric push rod is provided with the connecting plate, and the connecting plate surface is provided with the vertical board, and the vertical board side is provided with the first electric push rod, and the processing plate side is provided with the removal groove, and the removal groove is provided with the moving plate in, and the moving plate is provided with the lifting plate in, and the lifting plate surface is provided with the base, and the base side is provided with the clamping plate, beneficial effect is: first can through the first electric push rod to the clamping plate and push, thereby just can use two sets of clamping plate clamping effect to the workpiece positioning clamping, thereby the subsequent electric spark processing machine tool is convenient to the workpiece and processes, when processing ends, can start second electric push rod and make the connecting plate and go up, thereby just can make the processing plate and go up, thereby convenient subsequent to the workpiece after processing and take down.

The present invention provides a composite material with excellent conductivity and mechanical strength, an electrode for electrical discharge machining, and a method for manufacturing the composite material. [Solution] A composite material 1 comprising a matrix 2 made of tungsten and two or more particles 3 made of a good electrical conductive material present within the matrix 2, wherein the particles 3 are spaced apart from each other.

The application discloses a kind of electric spark cutting mechanism with error adjustment function and linear cutting machine tool, including column, beam, lower guide rod, upper guide rod, electrode wire, telescopic guide rod, two rotating shafts, two transmission lever bases, two cams, two electrode wire seats, two push rods and a transmission lever.The above electric spark cutting mechanism with error adjustment function can ensure that the position of electrode wire coincides with the theoretical cutting line when vertically processing workpiece, and can make the middle part of electrode wire translate a small distance while keeping the deflection angle unchanged when taper processing workpiece through two toggle assemblies, compensate the small parallel gap between the theoretical cutting line, make electrode wire accurately locate the position of theoretical cutting line, avoid the generation of cutting error, and improve the processing precision.

This invention discloses a method for measuring the maximum depth of continuous etch pits under uninterrupted single-pulse electrical discharge machining (EDM). The invention derives the maximum depth of etch pits when the EDM fluid is free of mixed powder and the workpiece is stationary by performing single-pulse etching trials on the workpiece. Then, by performing single-pulse etching trials on the workpiece with mixed powder in the EDM fluid and the workpiece stationary, the maximum depth of a single etch pit is derived when the EDM fluid contains mixed powder and the workpiece is moving. Finally, the maximum depth of all but the first etch pit in a plurality of consecutive etch pits is derived when the EDM fluid contains mixed powder and the workpiece is moving. This invention provides data for measuring the surface roughness of workpieces subjected to uninterrupted single-pulse etching under different discharge voltages, discharge currents, discharge times, or workpiece materials.

This invention relates to the field of machine tool equipment technology, and more particularly to an electrical discharge machining (EDM) machine tool, comprising a base and a mounting frame. An electrode assembly is mounted on the mounting frame, and a support frame is located above the mounting frame. A support base is fixed to the top of the support frame. The support base has symmetrically distributed positioning posts on both sides, and each positioning post has a groove on its closest side. A clamping mechanism is located inside the groove. Symmetrically distributed guide cylinders pass through the support frame, and the guide cylinders are connected to a top support mechanism, which supports the positioning posts. This invention achieves fully automated positioning and clamping of cylindrical workpieces through the coordinated operation of the sliding mechanism, the top support mechanism, and the clamping mechanism. Manual centering and clamping are eliminated, and the workpiece is automatically centered and firmly clamped before moving to the electrode assembly's machining position, effectively preventing shaking and displacement during machining and improving the accuracy and stability of EDM.

A wire electrical discharge machining method for forming a machined shape having a narrow portion (22) by performing enlargement machining on a workpiece (W) with a wire electrode (5) comprises: a first step of performing a first machining operation to machine the center of the narrow portion (22) using a first machining trajectory (Q1) before performing the enlargement machining; and a second step of performing enlargement machining on the portion of the machined shape excluding the center using a second machining trajectory (Q2) after performing the first machining operation.

The present application belongs to the field of graphite material precision machining, and particularly relates to a graphite taper hole compound machining system and process. The system comprises: an automatic milling device, which performs automatic milling machining on graphite workpieces installed in a clamp groove to process a prefabricated taper hole with a size allowance on the graphite workpiece; a secondary dust collection device, which performs secondary dust collection on the inside of the clamp groove; an electric spark machining device, which performs electric spark precision machining forming on the prefabricated taper hole; a workbench, which supports the clamp groove when machining the taper hole and is arranged across the automatic milling device, the secondary dust collection device and the electric spark machining device; a clamp groove, which is a groove body structure and internally installed with a clamp for clamping the graphite workpiece; a clamp groove walking mechanism, which drives the clamp groove to walk on the workbench and automatically switch between the devices; and a liquid injection device, which injects liquid medium for electric spark machining into the clamp groove. The present application can realize full automation through one-time clamping and can guarantee machining quality and control pollution.

The present invention provides a workpiece machining method for machining a workpiece by interposing electric discharge machining oil between a wire and the workpiece to perform electric discharge, wherein the kinematic viscosity of the electric discharge machining oil at 40°C is 0.70-5.0 mm2 / s, the diameter of the wire is 30-250 μm, the linear velocity of the wire during the machining is 11 m / minute or more, and the tension of the wire during the machining is 1-24 N.

The present invention provides an electrical discharge machining (EDM) pulse power supply and machining method based on a three-level Cuk circuit, comprising: a three-level Cuk main power circuit, a DC voltage source, an FPGA control circuit, and a drive circuit. The three-level Cuk main power circuit is used to connect the EDM gap to achieve discharge machining. The DC voltage source outputs an adjustable DC voltage to power the three-level Cuk main power circuit. The FPGA control circuit generates a PWM signal that enters the drive circuit. The drive circuit processes the PWM signal to generate a drive signal to control the on / off state of the switching transistors in the three-level Cuk main power circuit. This invention effectively increases the switching frequency of the system, significantly reduces voltage and current ripple, and lowers the selection requirements for switching transistors, filter inductors, and output filter capacitors. Simultaneously, it can meet the requirements of high and low voltage composite output for EDM pulse power supplies, efficiently and reliably fulfilling the requirements for EDM pulse power supplies.

This invention belongs to the field of electrical discharge machining (EDM) technology and discloses an EDM method and apparatus. The EDM method provided by this invention includes the following steps: dividing the workpiece into multiple interconnected processing areas, and disassembling the EDM electrode into multiple independent electrode modules, with each electrode module corresponding to one of the processing areas; each electrode module processes its corresponding processing area; the multiple electrode modules sequentially process their respective processing areas until the processing of each processing area is completed. The EDM method provided by this invention, by having multiple electrode modules sequentially process their corresponding processing areas, reduces the discharge area of ​​each electrode module during processing, avoids large instantaneous fluid negative pressure generated when each electrode module is lifted, ensures sufficient penetration and wetting of the processing area by the working fluid during processing, avoids damage to the workpiece, and guarantees processing quality.

An electrical discharge machine includes an electrode configured to machine a conductive workpiece by application of repetitive electric charges therefrom, and a controller operatively coupled to the electrode and configured to control application of the repetitive electric charges. The EDM also includes an ultrasonic sensor operatively coupled to the electrode and operatively coupled to the controller. The controller also determines a depth of the electrode in the conductive workpiece based on data from the ultrasonic sensor.

This invention belongs to the field of wire electrical discharge machining (EDM) technology, and relates to an EDM wire cutting machine tool for metal forming. It includes a machine bed, on which a dual-axis drive module is mounted. The dual-axis drive module is mounted on a support frame, and a clamping frame is fixedly connected within the support frame. An L-shaped frame is slidably connected to the machine bed, and a guide frame is fixedly connected within the support frame. A molybdenum wire is arranged on the machine bed, the L-shaped frame, and the guide frame. A sliding frame is slidably connected to the L-shaped frame and has a first push rod mounted on it. A linearly distributed first locking block is slidably connected to the sliding frame. The support frame has linearly distributed second push rods, and a second locking block is fixedly connected to the telescopic end of the second push rod. This invention ensures the smooth operation of the wire cutting process by providing timely support to the cut slit in the workpiece during the wire cutting process using the first and second locking blocks, maintaining the slit width, ensuring the stability of the molybdenum wire's movement space, and thus guaranteeing the smooth operation of the wire cutting process.

This invention relates to a method for diagnosing error sources in the manufacturing process of precision micro-connector molds. Addressing the challenge of integrating multi-source heterogeneous detection data and attributing errors during the manufacturing process, it proposes a method based on semantic fingerprint extraction and incremental fusion of knowledge graphs driven by multi-source raw data. Through industrial Ethernet, dedicated communication protocols, and optical character recognition, data from CNC machining, coordinate measuring machine (CMM), electrical discharge machining (EDM), and maintenance fault logs are collected in real time, and data feature compression, geometric fingerprinting, material response analysis, and semantic phrase standardization are performed. The core solution automatically constructs and evolves a knowledge graph through low-dimensional semantic fingerprint spatial mapping and anchor point expansion mechanisms, enabling real-time location of manufacturing error sources and the formation of causal chain attribution reasoning. This method achieves dynamic identification and ontology fusion of novel error patterns, improving the efficiency of anomaly diagnosis and the self-evolutionary capability of knowledge in the mold manufacturing process.

The present invention relates to a heat transfer expansion plate processing and extraction system, and more specifically, by removing and extracting a heat transfer expansion plate installed inside the piping of the Reactor Coolant System (RCS) on the primary side of a nuclear power plant, the heat transfer expansion plate can be removed by remotely operating an electrical discharge machining (EDM) device and a gripper device installed on the equipment after installing equipment inside the reactor; by processing the heat transfer expansion plate remotely in a high-radiation zone, radiation exposure to workers can be reduced; by precisely processing the heat transfer expansion plate using an EDM device, damage inside the reactor can be prevented; by processing cutting grooves and cutting holes using an EDM device, processing time can be shortened and foreign materials generated during cutting can be minimized; by processing a gripper hole inside the heat transfer expansion plate and inserting a gripper, the heat transfer expansion plate can be stably grasped and pulled; and by processing the position of the gripper hole in the heat transfer expansion plate at a desired location, It has the effect of being able to adjust the gripper shape and overall size of the extraction device.

Method for producing a coated electrode wire for use in electrical discharge machining, comprising: Providing a central wire having a first diameter and formed from a first copper-containing metal, Hot-dip coating of the central wire for a desired time and at a desired temperature through a melt bath containing a second metal having an evaporation temperature lower than that of the first metal, wherein an alloy layer is formed on the central wire by means of a diffusion reaction between the first metal and the second metal, which has greater hardness and lower elongation than the first metal and the second metal, and wherein a coating layer is formed on the alloy layer, and Drawing the central wire, which has the alloy layer and the coating layer, so that a coated electrode wire with a second diameter is formed, whereby cracks are formed during the drawing step due to the high hardness and low elongation in the alloy layer and in the coating layer, characterized in that the resulting alloy layer and the resulting coating layer are porous with a sponge-like structure.

This invention relates to the field of forming machine tool technology, specifically to an EDM (Electrical Discharge Machining) device capable of adjusting the working fluid tank area. The device includes a machine body and an electrode adjustment unit, and further includes: a working fluid tank comprising a first tank, a second tank, and a third tank arranged sequentially from the outside to the inside; the first tank is fixedly connected to the machine body; the second and third tanks are both capable of telescoping along the Z-axis; and a working fluid adding mechanism disposed at the bottom of a movable base and moving synchronously with the movable base. The working fluid tank of this invention is composed of nested first, second, and third tanks, with the inner cavity areas of the three tanks decreasing sequentially. Unused second and third tanks can be retracted into the first tank. Therefore, the tank area corresponding to the actual size of the workpiece can be dynamically selected, significantly improving the equipment's versatility while reducing the amount of working fluid and energy consumption during the processing of small-sized workpieces.

The present application belongs to the technical field of electric spark machining, especially to a dynamic compensation device for a numerical control wire cutting electric spark machining machine, comprising a rack, an upper beam plate, a lower beam plate, a side plate, a wire tensioner and a rolling wire tube, the wire tensioner comprising a fixed wheel, a moving wheel and an electric push rod, and the molybdenum wire sequentially passes through a guide wheel, an upper guide wheel, a lower guide wheel, the fixed wheel, the moving wheel and the rolling wire tube; additionally, the present application adds a pressure sensor, a displacement sensor and a controller on the basis of the mechanical structure to constitute a closed-loop control system, adopts a fuzzy PID algorithm to adjust the electric push rod to drive the moving wheel to move in real time, and realizes dynamic compensation of the electrode wire tension; further, the feedforward compensation module is used to suppress the tension peak caused by the acceleration and deceleration of the rolling wire tube, and the adaptive learning module is used to automatically optimize the optimal tension setting value under different working conditions by using a neural network. The present application can effectively solve the problems of large electrode wire tension fluctuation and easy wire breakage, and significantly improve the machining stability and machining quality.

A wire electrode for wirecut electrical discharge machining (WEDM) having a carbonaceous surface layer is disclosed. The wire electrode can include a core material, an outermost carbonization layer, and a phase transition layer between the core material and the carbonization layer.

This utility model relates to the field of electrical discharge machining (EDM) machine technology and discloses a workpiece positioning platform for an EDM machine. The platform includes a platform body, an air pump fixedly mounted at the bottom of the platform body, a connecting pipe fixedly connected to the air outlet of the air pump, a slide cylinder fixedly mounted on the side of the inner wall of the platform body, a slide rod slidably mounted on the inner wall of the slide cylinder, and a sliding plate fixedly mounted on the side of the slide rod. A sliding groove is formed on the inner wall of the platform body. The air pump supplies air to the inside of a three-way solenoid valve through the connecting pipe, which in turn supplies air to the inside of the slide cylinder. When the slide rod drives the side of the sliding plate to slide within the inner wall of the sliding groove, the sliding plate, through a top plate and an L-shaped plate, drives a circular plate and a rubber pad to clamp and limit the workpiece. Afterwards, the air pump and the three-way solenoid valve are closed, further assisting the rubber pad in stably clamping the workpiece. The rubber pad is then reset using a tension spring by opening the three-way solenoid valve.

This invention belongs to the field of electrolytic machining equipment and process technology, and provides an electrolytic electrical discharge machining (EDM) device and method for small-hole machining of titanium-steel composite plates. The device includes a clamping assembly with a fastening fixture for clamping the titanium-steel composite plate, the fastening fixture having a vertical adjustment mechanism for adjusting its height; a hole forming assembly with a first and second tube electrode, located on opposite sides of the titanium-steel composite plate, the first tube electrode being positioned closer to the titanium side and the second tube electrode closer to the steel side, each with a lateral adjustment mechanism for adjusting the horizontal distance between itself and the titanium-steel composite plate; and an electrolyte circulation device including a supply tank, with the first and second tube electrodes connected to the supply tank via two sets of electrolyte connecting pipes. This invention is adaptable to the characteristics of titanium-steel composite plates and solves the problems of recast layer defects and hole diameter deviations caused by existing single EDM machining.

This invention belongs to the field of aerospace manufacturing technology, and specifically relates to a method for precision machining of small holes in the steel ball seat of an electromagnetic valve. This invention utilizes electrical discharge machining (EDM) for rough machining to obtain a pre-hole, and then uses femtosecond laser machining (FLM) for finishing machining to obtain the final small hole. This solves the problems of existing machining technologies, such as the inability to guarantee the dimensional accuracy and roundness of the small hole, the inability to guarantee the quality of the sharp edge of the small hole opening, and the presence of surface defects such as remelted layers and microcracks on the hole wall surface. At the same time, it avoids the high processing costs and low production efficiency associated with using only femtosecond laser machining.

An electrode wire includes a brass core, a Cu—Zn alloy layer coated on the brass core, and a surface layer. The surface layer includes CuO, ZnO, Cu2(OH)2CO3, and a Cu—Zn intermetallic compound. The surface layer is in the shape of particles or sheets spaced apart on the Cu—Zn alloy layer; and the Cu—Zn alloy layer is exposed with respect to spaces between the particles or sheets.

The application belongs to the technical field of aircraft engine part machining, and relates to a method for machining a multilayer stepped honeycomb workpiece of an aircraft engine and an electrode grinding wheel. According to the final design size and the original blank size of the multilayer stepped honeycomb workpiece, the radial and axial grinding allowances of each layer of the honeycomb workpiece are calculated, and through a plurality of rounds of electric spark machining parameter tests, the radial and axial step sizes of the multistep forming electrode grinding wheel are determined, and a multistep forming electrode grinding wheel that is shaped according to the structure of the multilayer stepped honeycomb workpiece to be machined is manufactured. After the workpiece to be machined is clamped and positioned, synchronous electric spark grinding machining is performed to obtain the multilayer stepped honeycomb workpiece. The application adopts the method for machining the multilayer stepped honeycomb by using the multistep forming electrode grinding wheel and electric spark grinding machining process parameters to grind the multilayer stepped honeycomb at one time, reduces the number of rough and fine grinding of the honeycomb, saves labor, improves production efficiency, and shortens the machining cycle of the multilayer stepped honeycomb.

This invention discloses a combined electro-discharge machining (EDM) method for long, narrow slit structures, specifically relating to the field of EDM technology. The steps are as follows: The workpiece is mounted on the EDM electrode wire; the EDM electrode wire moves in the XY plane; the machined workpiece is then aligned with the electrolytic machining wire electrode; the power supply and electrolytic control system are turned on for secondary machining; the electrolytic machining wire electrode moves along a predetermined trajectory in the XY plane; after secondary machining, the power supply is disconnected, the electrolyte circulation system is shut off, the electrolytic machining wire electrode and workpiece are removed, and both are cleaned, thus completing the machining process. This invention solves the problem of existing machining methods struggling to achieve high-quality machining of ultra-thin sheet-like long, narrow slit structures, improving the machining quality and efficiency of such structures.

Electrode wire for electrical discharge machining. This wire comprises: - a metal core (10) having striations parallel to its longitudinal axis, forming, within cross-sections, a bumpy interface with local lower and upper extremities distributed over at least 75% of the periphery of the metal core, and - a surface layer (12) of pure zinc. The local lower and upper extremities are separated from each other by less than 12 µm. The bumpy interface is mainly contained between a lower limit (30) and an upper limit (32), the distance between the lower and upper limits being between 1 µm and 5 µm. The upper limit is separated from an outer face (6) by a distance of less than 4 µm. The surface layer (12) completely fills all the regions located between the upper limit (32) and the metal core. Fig. 5

This utility model discloses a graphite kneading and homogenizing device for electrical discharge machining (EDM), including a support frame. The support frame houses a motor, with one end of the motor connected to an operating frame. The cover plate of this EDM graphite kneading and homogenizing device rotates with the machine body via a second rotating shaft under the action of a servo motor. The air nozzles, driven by a blower, form a flow structure with the machine body through an air pipe, a branch pipe, and a connecting pipe. This allows multiple air nozzles to blow away residual material on the inner wall of the machine body during the unloading process of viscous graphite kneading material, reducing material residue. The eccentric wheels of this device rotate within the machine body via a third rotating shaft under the action of a motor. These multiple rotating eccentric wheels drive a fixed plate to rise and fall, causing vibration in the machine body and further increasing the unloading of residual material from the inner wall of the machine body.

To obtain a wiring fastener that can prevent contact between wiring materials and surrounding structures without using adhesive spacers. [Solution] The wiring fastener 100 of this disclosure comprises an adhesive portion 10 fixed to a structural member, a pair of space-securing portions 20 that rise from the side end of the adhesive portion 10 and have an opening 21 that is closed at least at the top, and a connecting portion 30 that connects the upper ends of the space-securing portions 20. Furthermore, in order to obtain the above wiring fastener 100, the manufacturing method of the wiring fastener in this disclosure comprises a molding step of molding a plurality of wiring fasteners 100 on a base plate, and a product separation step of separating the wiring fasteners 100 molded in the molding step by wire electrical discharge machining.

The utility model belongs to the electrode processing technical field, concretely relates to a kind of electrode assembly and spark machining device.The utility model discloses electrode processing piece includes electrode fixed seat and the multiple first electrode head of integratedly being arranged in electrode fixed seat, multiple first electrode head is arranged at the side of electrode fixed seat with interval, first electrode head and electrode fixed seat are integrally formed structure, connecting seat is located at one end of electrode fixed seat, and connecting seat is used to be connected with driving part.By using the electrode assembly in the present technical solution, connecting seat is used to connect the electrode assembly with driving part, which facilitates the movement of the driving part through the connecting seat to the electrode assembly, thereby realizing the processing of the workpiece to be processed. First electrode head and electrode fixed seat are integrally formed structure, which is better than the split structure of existing electrode head and electrode fixed seat, reducing assembly time and improving the assembly and processing efficiency of the electrode assembly. Moreover, multiple first electrode heads are provided on the motor fixed seat, which can process multiple components simultaneously.

This application provides an automatic wire feeding device for medium-speed wire cutting, applicable to the field of electrical discharge machining (EDM) technology. The device includes: a lower arm; a guide and guide wheel cylinder mounted on the lower arm; a guide rail located below the lower arm; an adapter plate connected to the guide wheel cylinder and driven by the guide wheel cylinder to move along the guide rail; a guide wheel and conductive block mounted on the adapter plate, with the conductive block positioned above the guide wheel; a rotary cylinder mounted on the guide rail and moving along the guide rail; and a finger cylinder for clamping the wire, connected to the rotary cylinder and rotating around the rotary cylinder as an axis, moving in contact with the adapter plate when clamping the wire. The automatic wire feeding device provided in this application achieves automatic wire feeding, enabling control of the wire height and angle, allowing the wire to stop at any position. Furthermore, the adapter plate further reduces the operational control difficulty during wire feeding.

The application discloses a kind of EDM processing quality trend analysis method and system, it is related to EDM processing technical field, the transient temperature field distribution in workpiece is solved, and the etching pit radius and etching pit depth are extracted from workpiece material melting point, spherical crown geometric analytical model is established and single pulse material removal volume is calculated, theoretical material removal rate and theoretical surface roughness are calculated in combination with effective discharge frequency calculation theory, the architecture of KAN network is initialized, open-circuit voltage, charging capacity and pulse width are corresponded to input layer, material removal rate and surface roughness are corresponded to output layer, activation function is defined, KAN agent model is initialized, process parameter combination is generated and prediction value is output, the same batch of process parameter combination is executed step S1 and step S2 to obtain physical reference value, iteratively trains until KAN agent model converges, generates multidimensional response surface, constructs and obtains the extreme point of processing quality comprehensive evaluation function to obtain preferred process parameter interval.