The present disclosure relates to electrochemical erosion of material from a workpiece. For example, a device for electrochemical erosion of material from a workpiece may include: a holder for the workpiece; an electrolyte carrier material impregnated with electrolyte; a voltage source imposing a negative potential on the electrolyte carrier; and a mechanical connection between the holder and the electrolyte carrier allowing a relative movement with at least one degree of freedom.

The present disclosure relates to electrochemical erosion of material from a workpiece. For example, a device for electrochemical erosion of material from a workpiece may include: a holder for the workpiece; an electrolyte carrier material impregnated with electrolyte; a voltage source imposing a negative potential on the electrolyte carrier; and a mechanical connection between the holder and the electrolyte carrier allowing a relative movement with at least one degree of freedom.

The invention relates to a method for electrical discharge machining of workpieces by electrical discharge pulses generated by a power module of an electrical discharge machine. The invention is characterized in that firstly the discharge voltage of a number N1 of electrical discharge pulses is acquired and stored, secondly a front discharge voltage (63) is determined out of this amount of N1 acquired discharge voltages and thirdly, the voltage Uhps (64) of the electrical discharge pulses produced by the power module for machining the workpiece (17) is adjusted in function of the determined front discharge voltage (63).

The invention relates to a method for electrical discharge machining of workpieces by electrical discharge pulses generated by a power module of an electrical discharge machine. The invention is characterized in that firstly the discharge voltage of a number N1 of electrical discharge pulses is acquired and stored, secondly a front discharge voltage (63) is determined out of this amount of N1 acquired discharge voltages and thirdly, the voltage Uhps (64) of the electrical discharge pulses produced by the power module for machining the workpiece (17) is adjusted in function of the determined front discharge voltage (63).

The invention relates to a method for making nanopores in thin layers or monolayers of transition metal dichalcogenides that enables accurate and controllable formation of pore within those thin layer(s) with sub-nanometer precision.

The invention relates to a method for making nanopores in thin layers or monolayers of transition metal dichalcogenides that enables accurate and controllable formation of pore within those thin layer(s) with sub-nanometer precision.

A method for producing at least one hollow valve for gas exchange may include introducing a bore into a valve shaft and into a valve head to form the at least one hollow valve, measuring a depth of the bore, washing the at least one hollow valve at least once, providing the at least one hollow valve in a retaining device, orienting the retaining device together with the at least one hollow valve with respect to an associated electrode, moving the associated electrode in relation to the at least one hollow valve, inserting the associated electrode into the bore of the at least one hollow valve, enlarging the bore in a region of the valve head by electromechanical machining processes, removing the associated electrode from the at least one hollow valve, rinsing and/or preserving the at least one hollow valve, and measuring a wall thickness of a valve bottom.

A method for producing at least one hollow valve for gas exchange may include introducing a bore into a valve shaft and into a valve head to form the at least one hollow valve, measuring a depth of the bore, washing the at least one hollow valve at least once, providing the at least one hollow valve in a retaining device, orienting the retaining device together with the at least one hollow valve with respect to an associated electrode, moving the associated electrode in relation to the at least one hollow valve, inserting the associated electrode into the bore of the at least one hollow valve, enlarging the bore in a region of the valve head by electromechanical machining processes, removing the associated electrode from the at least one hollow valve, rinsing and/or preserving the at least one hollow valve, and measuring a wall thickness of a valve bottom.

Electrical discharge machining apparatus comprising: a first housing defining an aperture for receiving a dielectric fluid; a resilient member defining one or more apertures for receiving one or more electrodes therein; and a second housing defining one or more apertures for receiving the one or more electrodes, and a surface to cause compression of the resilient member to hold the one or more electrodes when the first housing and the second housing are brought together.

Electrical discharge machining apparatus comprising: a first housing defining an aperture for receiving a dielectric fluid; a resilient member defining one or more apertures for receiving one or more electrodes therein; and a second housing defining one or more apertures for receiving the one or more electrodes, and a surface to cause compression of the resilient member to hold the one or more electrodes when the first housing and the second housing are brought together.