19results about "Machining electric circuits" patented technology

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 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 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.

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 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 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.

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.

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.

The invention relates to an electrolytic machining device and method for a long and thin deep groove, and aims to solve the problems of low precision of the deep groove, serious stray corrosion and difficulty in discharge of electrolytic products in the existing electrolytic machining, an eccentric cam vibration mechanism is arranged to drive a metal piston cathode to feed in a reciprocating manner, so that a machining gap is periodically changed; a pulsating electric field and an alternating flow field are formed, and electrolyte updating and electrolysis product discharging are enhanced; meanwhile, the insulating thin plate is tightly attached to the surface of the workpiece through the clamping mechanism, and stray corrosion of a non-machining area is effectively inhibited. The device is further integrated with an electrolyte circulating system, and efficient washing is achieved in cooperation with cathode vibration. Under the synergistic effect of a dynamically-regulated electric field and a flow field, high-precision and high-consistency slender deep groove machining of a workpiece is achieved through electrochemical dissolution, the machining stability and the surface quality are remarkably improved, and the method is suitable for manufacturing of complex structures of materials difficult to machine.

The disclosure describes a method for defining an electrode of a pulsed electrochemical machining (pECM) tool that is performed by one or more processors. The method includes receiving workpiece measurement data representative of a machined surface of a machined workpiece. The machined workpiece has been machined by a working surface of an initial electrode. The method includes identifying a set of dimensional differences between the workpiece measurement data and workpiece model data representative of a finished surface of a master workpiece. The method includes updating, based on the set of dimensional differences, initial electrode model data representative of the working surface of the initial electrode and outputting the updated electrode model data.

The application provides a recast layer precise removal and over-corrosion inhibition method, and belongs to the technical field of electric processing. The application firstly obtains the electric quantity Q0 required for breaking the passivation film per unit area of a workpiece to be processed containing a recast layer and the electric quantity Q1 required for removing the recast layer per unit area of the workpiece to be processed containing the recast layer without over-corrosion of the base body, then determines the electrolytic finishing machining parameters meeting the electric quantity condition through simulation, and finally performs electrolytic finishing machining on the workpiece to be processed containing the recast layer by using the determined electrolytic finishing machining parameters, so that the passivation film is quickly broken, the recast layer is precisely removed, and the over-corrosion phenomenon of the workpiece surface caused by as little electric quantity as possible is avoided, and the workpiece surface quality is improved.

The invention relates to an electrochemical machining interlayer electrode partition electrification accurate control device and method and application, and belongs to the field of electrochemical machining. The control device is characterized by consisting of a PLC (Programmable Logic Controller), a plurality of relays, a switching power supply, a machine tool control system and the like, and can realize automatic matching between the feeding direction of the interlayer electrode and the power-on state of each independent cathode. On one hand, the machine tool control system controls the main shaft movement system to drive the multiple independent cathode units in the interlayer electrode to conduct feeding movement, and the feeding direction is changed according to different part machining areas; and on the other hand, the machine tool control system utilizes the PLC to control the on-off of each relay contact so as to control the power-on state of each independent cathode unit. The feeding direction of the interlayer electrode can be controlled to be accurately matched with the power-on state of each independent cathode, the machining automation is improved, and the problem of manual operation is solved.