The present disclosure discloses an electrical discharge machining method, comprising: mounting an electrode blank on an electrode holder; mounting the electrode holder with the electrode blank on a chuck of a computer numerical control machine; processing the electrode blank into an electrode using the computer numerical control machine; mounting the electrode holder with the processed electrode on an EDM chuck of an electrical discharge machine; using the electrode to perform electrical discharge machining on a workpiece to be processed.

The present disclosure discloses an electrical discharge machining method, comprising: mounting an electrode blank on an electrode holder; mounting the electrode holder with the electrode blank on a chuck of a computer numerical control machine; processing the electrode blank into an electrode using the computer numerical control machine; mounting the electrode holder with the processed electrode on an EDM chuck of an electrical discharge machine; using the electrode to perform electrical discharge machining on a workpiece to be processed.

A wire electric discharge machine is provided with a storage unit configured to store the flow rate of a machining fluid delivered to a sealing portion in a machining tank in association with the flow rate of the machining fluid delivered to a nozzle. The flow rate of the machining fluid delivered to the nozzle is measured, and the flow rate of the machining fluid to be supplied to the sealing portion is read from the flow rate storage unit and set, based on the measured flow rate.

An electrical discharge machining oil composition of the invention includes an organic acid metal salt and a base oil, in which the organic acid metal salt is an organic acid salt of a metal having an electronegativity on Pauling scale of 2 or less, and the present composition has a volume resistivity at 80 degrees C. of 2?10.sup.?5 T?.Math.m or more and a kinematic viscosity at 40 degrees C. in a range from 0.5 mm.sup.2/s to 10 mm.sup.2/s.

An electrical discharge machining oil composition of the invention includes an organic acid metal salt and a base oil, in which the organic acid metal salt is an organic acid salt of a metal having an electronegativity on Pauling scale of 2 or less, and the present composition has a volume resistivity at 80 degrees C. of 2?10.sup.?5 T?.Math.m or more and a kinematic viscosity at 40 degrees C. in a range from 0.5 mm.sup.2/s to 10 mm.sup.2/s.

Provided are a silicon ingot slicing apparatus capable of slicing silicon ingots in various forms such as blocks or wafers using microbubbles and wire electric discharge machining.

A heterogeneous composite consisting of near-nano ceramic clusters dispersed within a ductile matrix. The composite is formed through the high temperature compaction of a starting powder consisting of a core of ceramic nanoparticles held together with metallic binder. This core is clad with a ductile metal such that when the final powder is consolidated, the ductile metal forms a tough, near-zero contiguity matrix. The material is consolidated using any means that will maintain its heterogeneous structure.

A heterogeneous composite consisting of near-nano ceramic clusters dispersed within a ductile matrix. The composite is formed through the high temperature compaction of a starting powder consisting of a core of ceramic nanoparticles held together with metallic binder. This core is clad with a ductile metal such that when the final powder is consolidated, the ductile metal forms a tough, near-zero contiguity matrix. The material is consolidated using any means that will maintain its heterogeneous structure.

The present invention describes a method for marking an object (18), the object (18) having a surface of a conductive material. The method comprises a step of applying an electric spark to the surface such that the material is at least one of partially melted and partially ablated by the electric spark, thereby forming a pattern on the object (18). Further, the present application relates to a marking system (10) for marking an object (18) using a spark generator (12) having a counter electrode (14) and a connector (16) for electrically connecting the spark generator (12) to the surface of the object (18) to be marked. Further, the present application relates to an authenticating system for authenticating or identifying an object (18) marked by the above described method for marking the object (18).

The present invention describes a method for marking an object (18), the object (18) having a surface of a conductive material. The method comprises a step of applying an electric spark to the surface such that the material is at least one of partially melted and partially ablated by the electric spark, thereby forming a pattern on the object (18). Further, the present application relates to a marking system (10) for marking an object (18) using a spark generator (12) having a counter electrode (14) and a connector (16) for electrically connecting the spark generator (12) to the surface of the object (18) to be marked. Further, the present application relates to an authenticating system for authenticating or identifying an object (18) marked by the above described method for marking the object (18).