The present application concerns a fuel-injection metering device for a motor vehicle. The fuel-injection device include a main body with at least one through-hole, whereby the main body forms a valve seat on its inner face that is provided to interact with a valve body, whereby the inner face of the main body is electrochemically machined. The application also concerns a mould, a production method, and a fuel-injection nozzle.

The invention relates to a work station for electrochemically machining a workpiece, having a number of recesses, including a base structure; a module which is fastened to the base structure and is configured to electrochemically machine the workpiece. A workpiece holder is fastened to the base structure. The workpiece holder is movable relative to the base structure along a feed axis which is parallel to the axis of rotation of the module. The module includes an electrode carrier arrangement, which is coupled to the module base body so the electrode carrier arrangement can be rotated together with the module base body about the axis of rotation of the module. The electrode carrier arrangement has a carrier frame and an electrode frame, where at least one electrode is detachably fastened to the electrode frame.

The invention relates to a work station for electrochemically machining a workpiece, having a number of recesses, including a base structure; a module which is fastened to the base structure and is configured to electrochemically machine the workpiece. A workpiece holder is fastened to the base structure. The workpiece holder is movable relative to the base structure along a feed axis which is parallel to the axis of rotation of the module. The module includes an electrode carrier arrangement, which is coupled to the module base body so the electrode carrier arrangement can be rotated together with the module base body about the axis of rotation of the module. The electrode carrier arrangement has a carrier frame and an electrode frame, where at least one electrode is detachably fastened to the electrode frame.

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.

Methods and systems of electrochemically machining a component are provided. The method may include applying two or more potentials to a tool electrode comprising an array of two or more individual electrodes to generate two or more electric fields in between the tool electrode and a workpiece opposite of the tool electrode, wherein each of the two or more electric fields is generated by one of the array of two or more individual electrodes.

Various embodiments include a device for the selective electrochemical machining of workpieces comprising: a machining head equipped with an electrolyte transmitter; and a supply channel for an electrolyte. The electrolyte transmitter is arranged in an interior of the supply channel and protrudes through an outlet opening of the supply channel to form a machining surface for the workpiece. The electrolyte transmitter comprises a cylinder arranged movably in the supply channel axially displaceable in the outlet opening.

A nozzle for an electrochemical machining device. The nozzle defining a body with first and second releasably attachable body portions forming an electrolyte cavity therebetween, when the first and second body portions are attached. The body includes an inlet port upstream of the cavity, and an outlet port for dispensing a jet of electrolyte towards a surface of a workpiece, in use, where a flow path is defined from the inlet port through the cavity to the outlet port.

A nozzle for an electrochemical machining device. The nozzle defining a body with first and second releasably attachable body portions forming an electrolyte cavity therebetween, when the first and second body portions are attached. The body includes an inlet port upstream of the cavity, and an outlet port for dispensing a jet of electrolyte towards a surface of a workpiece, in use, where a flow path is defined from the inlet port through the cavity to the outlet port.

Provided is an electrochemical machine. More particularly, provided is an electrochemical machine which removes an electrolytic product generated while electrochemical machining (ECM) so as to improve the quality of ECM and allows micro ECM. The electrochemical machine according to an embodiment of the present invention may include: a processing tub filled with an electrolyte; a processed object immersed in the electrolyte filled in the processing tub; a storage unit for storing the electrolyte; an electrolyte supply unit for supplying the electrolyte stored in the storage unit to the processing tub; a manifold comprising an inflow path, to which the electrolyte supplied by the electrolyte supply unit flows, and an outflow path connected to the inflow path for discharging the electrolyte flowing to the inflow path to the processed object, wherein a discharge hole of the outflow path is immersed in the electrolyte filled in the processing tub; an electrode which is fixed to the manifold so as for one end thereof to pass the outflow path and to be projected toward a lower part of the discharge hole and is electrically connected to the processed object; and a power unit for supplying power to the electrode and the processed object.

Provided is an electrochemical machine. More particularly, provided is an electrochemical machine which removes an electrolytic product generated while electrochemical machining (ECM) so as to improve the quality of ECM and allows micro ECM. The electrochemical machine according to an embodiment of the present invention may include: a processing tub filled with an electrolyte; a processed object immersed in the electrolyte filled in the processing tub; a storage unit for storing the electrolyte; an electrolyte supply unit for supplying the electrolyte stored in the storage unit to the processing tub; a manifold comprising an inflow path, to which the electrolyte supplied by the electrolyte supply unit flows, and an outflow path connected to the inflow path for discharging the electrolyte flowing to the inflow path to the processed object, wherein a discharge hole of the outflow path is immersed in the electrolyte filled in the processing tub; an electrode which is fixed to the manifold so as for one end thereof to pass the outflow path and to be projected toward a lower part of the discharge hole and is electrically connected to the processed object; and a power unit for supplying power to the electrode and the processed object.