An electrochemical machining assembly for boring a passage in an electrically conductive workpiece. The electrochemical machining assembly includes an electrochemical machining tool having a telescoping collar with an articulating head coupled thereto. The telescoping collar is actuated between a contracted configuration and an extended configuration to advance the telescoping collar stepwise in the passage. The articulating head is tiltable relative to the telescoping collar to determine a direction of the passage. The electrochemical machining assembly is configured to remove material from the workpiece upon application of a voltage between the articulating head and the workpiece via a circulating electrolyte fluid to lengthen the passage.

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 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.

An electrochemical machining apparatus being capable of performing multiple points and multiple angles machining is provided. The electrochemical machining apparatus includes at least one electrode member, a guiding member and an actuation member. The electrode member includes a conductive end and a free end, wherein the electrode member is rigid and unbendable. The guiding member is for limiting and guiding the electrode member to move. The actuation member is for exerting a force to the free end of the electrode member, thereby enabling the conductive end of the electrode member to form angle variations. A force-exerting direction from the actuation member to the free end is parallel to a central axis of the electrode member or deflects off the central axis so as to form the angle variations.

An electrochemical machining apparatus being capable of performing multiple points and multiple angles machining is provided. The electrochemical machining apparatus includes at least one electrode member, a guiding member and an actuation member. The electrode member includes a conductive end and a free end, wherein the electrode member is rigid and unbendable. The guiding member is for limiting and guiding the electrode member to move. The actuation member is for exerting a force to the free end of the electrode member, thereby enabling the conductive end of the electrode member to form angle variations. A force-exerting direction from the actuation member to the free end is parallel to a central axis of the electrode member or deflects off the central axis so as to form the angle variations.

The present invention relates to an electrochemical machining apparatus for gear outline, which is used for trimming the gear outline of the gear part of a workpiece and comprises a first moving mechanism, a second moving mechanism, a cathode electrode, and a gear alignment member. The cathode electrode is disposed at the first moving mechanism. The second moving mechanism is connected with the gear alignment member. The gear alignment member includes a plurality of alignment gears for aligning the location of a plurality of teeth of the gear part of the workpiece. Thereby, the plurality of teeth of the workpiece may correspond to the cathode electrode. Then, the cathode electrode may perform electrochemical machining on the plurality of teeth, and thus, trimming the outline of the plurality of teeth.

The present invention relates to an electrochemical machining apparatus for gear outline, which is used for trimming the gear outline of the gear part of a workpiece and comprises a first moving mechanism, a second moving mechanism, a cathode electrode, and a gear alignment member. The cathode electrode is disposed at the first moving mechanism. The second moving mechanism is connected with the gear alignment member. The gear alignment member includes a plurality of alignment gears for aligning the location of a plurality of teeth of the gear part of the workpiece. Thereby, the plurality of teeth of the workpiece may correspond to the cathode electrode. Then, the cathode electrode may perform electrochemical machining on the plurality of teeth, and thus, trimming the outline of the plurality of teeth.

The present invention concerns a method for producing riflings in barrels of guns including a barrel 6 as a workpiece 6 which defines an axis A in its longitudinal direction and which has a bore lying in the longitudinal direction which defines an inner wall of the barrel and a tool 8 comprising a tool head 10, which has an outer contour corresponding to the shape of the riflings to be produced, consisting of an electrically conductive material, wherein an electrolyte solution is pumped through the bore of the barrel 6, while the tool 8 is guided through the bore of the barrel 6, wherein a pulsed electrical voltage is applied to workpiece 6 and tool 8, with which a direct current is generated, the workpiece 6 being the anode and the tool head 10 being the cathode, the barrel 6 being positioned vertically with its longitudinal direction, wherein between the electrically conductive outer contour of the tool head 10 and the inner wall of the barrel 6 there is a gap surrounding the tool head 10, through which the electrolyte solution flows, and the tool 8 being moved relatively to the workpiece 6 through the bore of the barrel 6 during the application of the pulsed voltage and simultaneously rotated about the axis A, thereby producing the riflings on the inner wall of the bore, and means for carrying out the method.

The present invention concerns a method for producing riflings in barrels of guns including a barrel 6 as a workpiece 6 which defines an axis A in its longitudinal direction and which has a bore lying in the longitudinal direction which defines an inner wall of the barrel and a tool 8 comprising a tool head 10, which has an outer contour corresponding to the shape of the riflings to be produced, consisting of an electrically conductive material, wherein an electrolyte solution is pumped through the bore of the barrel 6, while the tool 8 is guided through the bore of the barrel 6, wherein a pulsed electrical voltage is applied to workpiece 6 and tool 8, with which a direct current is generated, the workpiece 6 being the anode and the tool head 10 being the cathode, the barrel 6 being positioned vertically with its longitudinal direction, wherein between the electrically conductive outer contour of the tool head 10 and the inner wall of the barrel 6 there is a gap surrounding the tool head 10, through which the electrolyte solution flows, and the tool 8 being moved relatively to the workpiece 6 through the bore of the barrel 6 during the application of the pulsed voltage and simultaneously rotated about the axis A, thereby producing the riflings on the inner wall of the bore, and means for carrying out the method.

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 mold, a production method, and a fuel-injection nozzle.