41results about "Machining electric circuits" patented technology

The invention discloses a precise electrolytic machining method for a herringbone groove microstructure of an air floatation kinematic pair, which comprises the following steps: machining a workpiece by adopting a profiling cathode with a convex structure complementary with a target herringbone groove on the surface, and connecting the workpiece with an anode assembly; the convex structure is a processing area, and an insulating coating is arranged on the surface of a non-processing area except the convex structure; the processing pulse of the power supply system is started at the liquid supply closing stage of the electrolyte system, and the processing pulse of the power supply system is stopped and the electrolyte is updated at the liquid supply opening stage of the electrolyte system. High-precision, low-cost and high-efficiency machining of the herringbone groove microstructure is achieved through profiling cathode shaping, group pulse precise etching and intermittent liquid supply and deslagging, and the problems of stray corrosion control, groove depth gradual change uniformity and batch consistency in electrolytic machining are solved.

The invention discloses a passive bipolar movable mask electrochemical machining device and method for a workpiece. The device comprises a power supply control system, an electrochemical machining system, a motion control system and an electrolyte circulating system, the electrochemical machining system is provided with a first electrochemical machining tank and a second electrochemical machining tank which are oppositely arranged, two electrodes are arranged in each electrochemical machining tank, and two movable masks are pressed and attached to the two faces of a workpiece to form a mask structure. The motion control system drives the two grooves to be closed or separated; the electrolyte circulating system forms flushing and sucking liquid circulation facing the surface of a workpiece through a flushing pipe and a liquid sucking pipe; the power supply control system intermittently switches the polarities of the two electrodes, so that charge distribution on the two sides of the workpiece is alternately changed, and passive bipolar electrochemical machining is realized; according to the method, photoresist is replaced by the movable mask, the process is simplified, the efficient liquid flushing and absorbing mode and the electrostatic induction machining mode are combined, the inter-electrode mass transfer and electric field uniformity are remarkably improved, and the machining efficiency, precision and depth-diameter ratio are improved.

A device (1) and a method for plasma-electrolytic machining of an electrically conductive surface (2) of a workpiece (3) are described. The device has an application unit (4) for applying an electrolyte jet to the surface (2), a supply unit (5) for at least temporarily supplying the application unit (4) with the electrolyte required to generate the electrolyte jet, at least one electrode (6), which forms a counter-electrode to the surface (2) during machining, and at least one electrical energy source (7), using which the electrode and the surface can be supplied with electrical energy during machining, such that a current flows between the electrode (6) and the surface (2) to be machined upon contact with the electrolyte.The technical solution described is characterized in that the application unit (4) is designed to apply a first and at least one second electrolyte jet, which have different jet effect areas on the surface to be machined, simultaneously or consecutively to the surface (2) of the workpiece (3).

A generator for generating processing pulses at the electrode gap (3) of a device for electrochemically machining workpieces (1), comprising a power supply device (7) and switching devices (9) for pulse-wise connection of the power supply device (7) to connecting cables (5, 6) that are led to the electrode gap (3), with a circuit (8, 9, 13, 15) for increasing the steepness of the edges (25, 27) of current pulses flowing through the electrode gap (3) by recuperating field energy stored in the connecting cables (5, 6) during the pulses, wherein the circuit (8, 9, 13, 15) is provided for recuperating field energy stored as a result of the inductance (10) of the connecting cables (5, 6) and for recuperating the field energy by charging a capacitor (13) by a current that the inductance (10) generates after the connecting cables (5, 6) have been separated from the power supply device (7) by the switching device (9). and the circuit (8,9,13,15) comprises a diode (8) preventing the discharge of the capacitor (13) via the power supply device (7), characterized in that the connecting cables (5, 6), the power supply device (7), the capacitor (13) and the diode (8) are connected in series in such a way that they are arranged on a common current path at least for the current flowing during the recuperation of the field energy stored in the connecting cables (5, 6).

The present application discloses a precision control method and system for electrolytic wire cutting and finishing of complex profiles, which relates to the technical field of electrolytic machining. The method includes decomposing the cross-sectional profile of the electrolytic wire to be cut and finished into straight line segments, convex circular arc segments and concave circular arc segments based on geometry; according to Faraday's law, respectively determining the mathematical relationships between the material removal depth and each processing parameter during electrolytic wire cutting and finishing at each segment; substituting the obtained circular arc curvature radius, wire electrode radius, average current density value collected according to test records or calculated by electric field simulation, and wire electrode sweeping speed into the mathematical relationships, and taking the wire electrode sweeping speed of the straight line segment as the standard, respectively calculating the wire electrode sweeping speeds of the concave circular arc segment and the convex circular arc segment; according to the calculated wire electrode sweeping speeds of the concave circular arc segment, the convex circular arc segment and the straight line segment, performing electrolytic wire cutting and finishing. The present application can improve the machining profile accuracy of parts.

The invention discloses a method for determining a pulse electrochemical machining non-linear dynamic characteristic parameter mapping relation, which comprises the following steps: acquiring a current density time sequence of a workpiece in a pulse electrochemical machining process and surface topography data of the workpiece after the pulse electrochemical machining is completed, performing non-linear dynamic analysis on the surface topography data, and determining a pulse electrochemical machining non-linear dynamic characteristic parameter mapping relation. Obtaining a first workpiece surface space heterogeneous recursive entropy; performing nonlinear kinetic analysis on the current density time sequence to obtain a first current density heterogeneous recursive entropy; and establishing a linear regression relationship according to the first current density heterogeneous recursive entropy and the first workpiece surface space heterogeneous recursive entropy, and obtaining a corresponding relationship between the current density and the workpiece surface microstructure. Based on this, a linear regression relationship is established between the current density and the surface topography data, the surface quality of the workpiece after machining under the current parameters can be predicted in real time only according to the current density signal, and off-line measurement does not need to be carried out after machining is completed.

This invention relates to the technical fields of human-machine interaction and machine tool programmable control systems in electrolytic machining applications. It provides an electrolytic method and a split-type electrolytic equipment based on a machine tool programmable control system. By configuring three positive and negative pulse combinations corresponding to different electrolyte states and workpiece machining complexities, and selecting one of the three positive and negative pulse combinations that is suitable for the electrolyte state and workpiece machining complexity, the first and second electrolytic machine tools are controlled to perform electrolytic machining on workpieces at multiple stations. This enables the configuration and selection of the three positive and negative pulse combination types, improving the intelligence level and stability of workpiece electrolytic machining.

The present invention discloses an auxiliary processing device and online detection method for rotary electrochemical machining, relating to the technical field of rotary electrochemical machining. The auxiliary processing device for rotary electrochemical machining comprises: a liquid supply assembly and a detection assembly, the liquid supply assembly being disposed at least at one end of a machining area; the liquid supply assembly being configured to supply electrolyte only to the machining area; and a detection assembly disposed on one side of the machined area of ​​an anode workpiece, configured to detect the profile of the machined surface of the anode workpiece and calculate the surface corrosion depth and real-time machining gap. The present invention enables real-time detection of machining status and quality, thereby improving the machining quality of thin-walled annular parts and advancing the maturity of this technology.

The invention relates to the technical field of man-machine interaction, machine tool programmable control systems and the like in electrolytic machining process application, and provides an electrolysis method and split type electrolysis equipment based on a machine tool programmable control system. Selecting one of the three positive and negative pulse combination types matched with the electrolyte state and the workpiece machining complexity, and controlling the first electrolytic machine tool and the second electrolytic machine tool to perform electrolytic machining on the workpieces on the multiple stations, so that configuration and selection of the three positive and negative pulse combination types are realized. And the intelligent degree of workpiece electrolytic machining and the stability of machining quality are improved.

Methods and systems of electrochemically machining are provided. The methods may include applying a first potential to a tool electrode of an electrochemical machining system to generate a primary electric field. The electrochemical machining system may include a workpiece opposite the tool electrode, at least one bias electrode, and at least one fluid delivery channel within the at least one bias electrode. The method may further include applying at least one second potential to the at least one bias electrode. The method may further include delivering a charged electrolyte solution through the at least one fluid delivery channel into the electrolyte solution. Applying at least one second potential and the delivering the charged electrolyte solution generates at least one secondary electric field adjacent to the primary electric field and quenches at least one location of the primary electric field.

A pulsed electrochemical machining (pECM) system including a pECM assembly. The pECM assembly includes a tool body which defines a tool axis and includes an electrode which includes an electrically conductive material and defines working surface. The pECM system includes an electrolyte system configured to supply electrolyte to an interelectrode gap, and the electrolyte system includes a vacuum system. The tool body defines a working surface configured to face a workpiece, and the working surface defines a plurality of apertures configured to fluidically couple to an electrolyte system. The tool body includes a manifold block defining at least one electrolyte inlet and at least one electrolyte outlet, a baffle element, and the electrode. The tool body is configured to receive electrolyte from an electrolyte system at the electrolyte inlet in the manifold block and feed electrolyte through the baffle element to the working surface of the electrode.

Example electrode connection systems and devices for samples during an electrochemical machining program are disclosed. In particular, an electrode connection system can support, hold, encase, and / or otherwise maintain contact with a sample in an electrochemical machining system. For example, the sample may be housed in a fixture, with an electrode in electrical contact with the sample and a common return path (e.g., to ground) for current from an electrolyte solution to flow through the sample. The fixture and sample can include an electrically conductive material.

Methods and systems of electrochemical machining are provided. The method can include applying a first electrical potential to a tool electrode of an electrochemical machining system to generate a primary electric field. The electrochemical machining system can include a workpiece opposite the tool electrode, at least one bias electrode, and at least one fluid delivery channel within the at least one bias electrode. The method can also include applying at least one second electrical potential to the at least one bias electrode. The method can also include delivering a charged electrolyte solution through the at least one fluid delivery channel into the electrolyte solution. The application of the at least one second electrical potential and the delivery of the charged electrolyte solution generates at least one secondary electric field adjacent to the primary electric field and quenches at least one location of the primary electric field.

The present invention relates to the technical fields of transmission and recognition of electrical digital signals, and provides an intelligent control system for an electrolytic machine tool and an electrolytic machine tool. A manual operation module, an automatic operation monitoring module and a machine tool continuous state monitoring module are arranged. The manual operation module is used to manually adjust the moving position of an electrolytic spindle. The automatic operation monitoring module controls the electrolytic spindle to electrolytically process a metal workpiece, monitors the current state of a running physical machine tool, and displays the current state obtained by monitoring in images and texts. The machine tool continuous state monitoring module draws a machine tool continuous state curve according to the machine tool from the start of operation to the current continuous operation state, and controls the drawn machine tool continuous state curve to be displayed on a machine tool continuous state monitoring interface, thereby optimizing the layout of functional modules of the control system of the electrolytic machine tool, saving system development resources, improving the interactive friendliness of the functional modules, and reducing the cost and risk of using the system by enterprises.

The invention relates to a device for electrochemically machining a metal blank, in particular ECM or PECM device having a machining electrode by means of which material can be removed from the blank when voltage is applied.

The invention relates to a multi-channel discharge detection and control method and device in electric spark mirror finishing, which are applied to the technical field of electric spark mirror finishing, and comprises the following steps of: realizing accurate identification of single-channel, multi-channel and abnormal discharge states through discharge current rising edge and discharge voltage breakdown delay detection; different control actions are set according to different working modes, so that the aim of automatically increasing, reducing or maintaining the concentration of the carbon powder is fulfilled; the limitation of traditional control depending on manual experience is overcome, and the machining stability and universality are improved; carbon powder and metal filing powder are automatically generated through a reverse repair tool electrode, the number density of free electrons of the machining fluid is improved, conversion from single-channel discharge to multi-channel discharge is promoted, discharge energy is dispersed, large-area mirror machining in common machining fluid is achieved, external powder does not need to be additionally added, and the powder separation problem of mixed powder machining fluid is solved.

The invention discloses a million-ampere-level rotary electricity leading mechanism for rotary printing electrolytic machining, and relates to the technical field of electrolytic machining. The million-ampere-level rotary electricity leading mechanism comprises an anode assembly and a cathode assembly; the anode assembly comprises an anode tool, and the cathode assembly comprises a cathode tool; each of the anode assembly and the cathode assembly comprises a rotary electricity leading assembly and an air cooling assembly; according to the invention, internal air cooling and external water cooling are combined, a multi-path and targeted efficient heat dissipation system is constructed, and the system is especially suitable for a million-ampere-level large-current working condition. The spiral inclined groove is formed in the surface of the conductive copper rod, simple axial flow is changed into spiral turbulent flow, the heat exchange efficiency of gas and the surface of the conductive copper rod is greatly improved, and the influence of thermal expansion of the rotary electricity guiding assembly on rotary printing electrolytic machining precision is reduced. Stable electricity leading from a static state to a rotating state is realized through the conductive slip ring; large-current transmission of the hollow main shaft is achieved through the middle conductive copper rod. The method is suitable for rotary printing electrolytic machining of large thin-wall rotary body parts.

An exemplary electrochemical machining system and method for machining a surface of a specimen. In particular, the system includes a nozzle configured to eject a jet of electrolyte solution toward the surface of the specimen. The position or orientation of the nozzle can be controlled to direct the jet of electrolyte solution from the nozzle toward a region of the surface of the specimen (e.g., a region for electrochemical etching or other surface treatment). Electrochemical machining is performed by applying an electric charge to the nozzle and applying an electric charge to the specimen (e.g., to ground or other charge return path) such that the nozzle and specimen define first and second electrodes of an electrolytic cell electrically connected by the jet of electrolyte solution.

The invention provides a precise removal and over-corrosion inhibition method for a recast layer, and belongs to the technical field of electromachining. The method comprises the following steps: firstly, obtaining electric quantity Q0 required for puncturing a passivation film in unit area of a to-be-processed workpiece containing a recast layer and electric quantity Q1 required for removing the recast layer in unit area of the to-be-processed workpiece containing the recast layer and preventing a matrix from being excessively corroded, and then determining electrolytic finishing parameters meeting the electric quantity condition through simulation; and then the to-be-machined workpiece containing the recasting layer is subjected to electrolytic finishing according to the determined electrolytic finishing parameters, so that rapid breakdown of a passive film, accurate removal of the recasting layer and over-corrosion of the surface of the workpiece caused by electricity escape as little as possible are achieved, and the surface quality of the workpiece is improved.

To provide methods and systems of electrochemical machining.SOLUTION: The method may include applying a first potential to a tool electrode of an electrochemical machining system to generate a primary electric field. The electrochemical machining system may include a workpiece opposite to the tool electrode, at least one bias electrode, and at least one fluid delivery channel within the at least one bias electrode. The method may further include applying at least one second potential to the at least one bias electrode. The method may further include delivering a charged electrolyte solution through the at least one fluid delivery channel into the electrolyte solution. Applying at least one second potential and delivering the charged electrolyte solution generate at least one secondary electric field adjacent to the primary electric field and quenches at least one location of the primary electric field.SELECTED DRAWING: Figure 1

The application discloses a tubular electrode and a preparation method, an electrolytic finishing machining method and a device thereof, and relates to the technical field of electrolytic machining. The tubular electrode comprises a tubular electrode body, the tubular electrode body is hollow inside, the upper and lower ends of the tubular electrode body are liquid inlet holes for flowing in electrolyte, and the side wall is provided with liquid outlet holes for flowing out electrolyte. The outer circumferential surface of the tubular electrode body is divided into a conductive area and an insulating area, the two side edges of the conductive area are parallel to the central axis of the tubular electrode body, and the liquid outlet holes are arranged in the insulating area. The electric field is intermittently supplied, and the flow field is intermittently flushed. The outer circumferential surface of the tubular electrode body is divided into the conductive area and the insulating area, the electrolysis is intermittent, the liquid flushing is intermittent, the electric field and the flow field are coupled, the high-locality control of the electric field and the high-locality flushing of the flow field in the machining area can be realized, the stray corrosion in the non-machining area and the machined area is inhibited, and the machining effect with high machining precision and high surface quality is obtained.

Systems and methods for sterilization using nonthermal plasma (NTP) ionization are disclosed. An example method for inactivation of viable microorganisms includes: inactivating viable microorganisms in a predetermined volume by: installing a plurality of ceiling mounted direct current (DC) or alternating current (AC), bipolar or steady-state, ion emitter modules based on a geometry of the predetermined volume; and producing, using the plurality of ceiling mounted ion emitter modules, a DC or AC, bipolar or steady-state, nonthermal plasma (NTP), each of the ceiling mounted ion emitter modules comprising a high voltage power supply (HVPS).

Example electrochemical machining systems and methods for machining a surface of a sample. In particular, the system includes a nozzle configured to dispense a jet of an electrolyte solution towards the surface of the sample. A position or orientation of the nozzle can be controlled to direct the jet of the electrolyte solution from the nozzle towards an area of the surface of the sample (e.g., an area for electrochemical etching or other surface treatment). The electrochemical machining is performed by application of a charge to the nozzle and apply a charge to the sample (e.g., grounding or other charge return path), such that the nozzle and the sample define first and second electrodes of an electrolytic cell, electrically connected by the jet of electrolyte solution.

The invention relates to the technical field of electrolytic machining, and discloses a rotating cathode micro-slender groove electrolytic machining device and a machining method thereof. The device comprises a rotating cathode made of copper foil, an insulating thin plate, a clamping mechanism, a long shaft with threads, a tightening nut and an electrolysis power supply, the rotating cathode is fixed between the insulating thin plates through a threaded long shaft and a tightening nut, and the clamping mechanism positions and fixes the insulating thin plates through a sliding block, a cross beam and a bolt and enables one ends of the insulating thin plates to be tightly attached to a workpiece. During machining, a prime motor drives a rotating cathode to rotate, the rotating cathode is connected with the cathode of an electrolysis power supply through a graphite brush, a workpiece is connected with the anode, and electrolyte flows through a channel formed by the rotating cathode, an insulating thin plate and the workpiece; and rotating the cathode to disturb the electrolyte to enhance the washing effect and quickly take away the processed product. Through the design that the insulating thin plate is used for limiting and the rotating cathode is used for disturbing the electrolyte, the surface quality and machining precision of micro-slender groove electrolytic machining are effectively improved.

The present invention relates to a device comprising a device casing and a first and second flexible contact extending from the casing, each comprising a mounting means and a flexible applicator portion extending therefrom, wherein the first and second flexible contacts are each adapted to receive conductive fluid and subsequently to apply the conductive fluid to a surface, and one of the first and second flexible contacts is positively charged, and the other is negatively charged, relative to one another.

An apparatus (1) and a method for plasma electrolytic machining of the conductive surface (2) of a workpiece (3) are described, where it is necessary that at least two jet action areas are generated on the surface of the workpiece. The apparatus has an application unit (4) for applying an electrolyte jet to the surface (2), a supply unit (5) for at least temporarily supplying the application unit (4) with the electrolyte necessary for generating the electrolyte jet, at least one electrode (6) that forms a counter electrode with respect to the surface (2) during machining, and at least one electrical energy source (7) for supplying electrical energy to the electrode and the surface during machining, and is configured such that a current flows when there is contact with the electrolyte between the electrode (6) and the surface (2) to be machined.

Example electrode connection systems and devices for samples during electrochemical machining procedures are disclosed. In particular, the electrode connection system may support, retain, contain a sample and / or otherwise maintain contact with the sample in an electrochemical machining system. For example, a sample may be housed in a fixture with electrodes in electrical contact with the sample and a common return path (e.g., to ground) to flow an electrical current from an electrolyte solution through the sample. The fixture and the sample may include an electrically conductive material.

The utility model discloses a double-station double-power-supply electrolysis system which comprises a working cavity, and two independent electrolysis stations are arranged in the working cavity; each electrolysis station is connected to an independent electrolysis power supply controlled based on the same PLC for independent power supply, the positive electrode of each independent electrolysis power supply is connected to the positive electrode of the independent electrolysis station through a diode, and the negative electrode of each independent electrolysis power supply is connected to the negative electrode of the independent electrolysis station. According to the double-station double-power-supply electrolysis system disclosed by the utility model, two independent electrolysis stations are arranged in one working cavity and are respectively powered by two high-frequency pulse power supplies; discharge of the high-frequency pulse power supply is precisely controlled by the PLC and the touch screen through 485 communication, and a high-power diode is additionally arranged at the output ends of the two power supplies to prevent the two power supplies from being connected in series, so that the system is particularly suitable for electrolysis of multiple varieties and small batches of workpieces.

Example electrochemical machining systems and methods for machining a surface of a sample. In particular, the system includes a nozzle configured to dispense a jet of electrolyte solution toward a surface of the sample. The position or orientation of the nozzle may be controlled to direct a jet of electrolyte solution from the nozzle toward a region of the surface of the sample (e.g., a region for electrochemical etching or other surface treatment). Electrochemical machining is performed by applying charge to the nozzle and to the sample (e.g., ground or other charge return path) such that the nozzle and the sample define a first electrode and a second electrode of the electrolytic cell that are electrically connected by a jet of electrolyte solution.

The group hole machining machine tool based on the electrolytic machining electrode array has the advantages of being high in machining precision, good in consistency, high in self-adaption and the like, the machining state is monitored in real time through multiple sensors, the material removal rate model and a multi-parameter collaborative optimization algorithm are combined, and the machining precision is improved. Dynamic intelligent adjustment of key parameters such as the electrode feeding speed, the rotating speed, the electrolyte flow and the current and voltage is achieved, and the problems that in traditional electrolytic machining, due to unsmooth electrolyte updating and parameter fixing, the machining precision is lowered, and the consistency is poor are effectively solved; particularly, a fuzzy PID control strategy is adopted, the response speed and stability are both considered, the online learning ability is achieved, model parameters can be continuously optimized according to historical machining data, the adaptability and reliability of the machining process are further improved, and the method is suitable for high-precision group hole machining occasions.