In the case where the shape of a machining path generated by analyzing a machining program includes a concave arc corner portion, the machining path is compensated by inserting a path leading from the end point to the start point of the concave arc along a path inside the concave arc and leading from the start point to the end point of the concave arc on the concave arc again.

In the case where the shape of a machining path generated by analyzing a machining program includes a concave arc corner portion, the machining path is compensated by inserting a path leading from the end point to the start point of the concave arc along a path inside the concave arc and leading from the start point to the end point of the concave arc on the concave arc again.

A machining program creating device for a wire electric discharge machine creates a machining program for machining a keyway on the side surface of a round hole in a workpiece, based on a previously specified diameter of the round hole, a center position of the round hole measured by bringing a wire electrode into contact with the workpiece, and a previously defined shape of the keyway.

Systems and methods disclosed herein relate to texturing a metal surface. A method for texturing a metal surface comprises disposing a first ceramic coating onto a first surface on the metal surface, applying a media to the first ceramic coating, disposing a second ceramic coating onto the media, and/or heat treating the metal surface for an end duration.

Methods, systems, and devices are disclosed for fabricating clean, oxidation-free nanoparticles of electrically conducting metals and alloys using spark erosion techniques. In one aspect, a method includes dispersing bulk pieces of an electrically conducting material in a dielectric fluid with mechanical vibrations within a container; generating an electric field using electrodes in the dielectric fluid using by an electric pulse, in which the electric field creates a plasma in a volume existing between the bulk pieces that locally heats the bulk pieces to form structures within the volume, the dielectric fluid quenching the structures to form nanoparticles, and filtering the nanoparticles through a screen including holes of a size allowing nanoparticles of the size or smaller to pass through the screen to a region in the container, in which the dielectric fluid inhibits oxidation of the surface of the nanoparticles.

A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration; forming an inlet opening and an outlet opening in the external metallic shell in order to provide a fluid path through the metallic foam core; and injecting a thermoplastic material into the metallic foam core via the inlet opening.

A method of making a light weight housing for an internal component is provided. The method including the steps of: forming a first metallic foam core into a desired configuration; forming a second metallic foam core into a desired configuration; inserting an internal component into the first metallic foam core; placing the second metallic foam adjacent to the first metallic core in order to secure the internal component between the first metallic foam core and the second metallic foam core; and applying an external metallic shell to an exterior surface of the first metallic foam core and the second metallic foam core.

A method of making a light weight housing for an internal component is provided. The method including the steps of: forming a first metallic foam core into a desired configuration; forming a second metallic foam core into a desired configuration; inserting an internal component into the first metallic foam core; placing the second metallic foam adjacent to the first metallic core in order to secure the internal component between the first metallic foam core and the second metallic foam core; and applying an external metallic shell to an exterior surface of the first metallic foam core and the second metallic foam core.

A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; inserting a pre-machined component into an opening in the metallic foam core; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration and after the pre-machined component has been inserted into the metallic foam core; introducing an acid into an internal cavity defined by the external metallic shell; dissolving the metallic foam core; and removing the dissolved metallic foam core from the internal cavity, wherein the component and the external metallic shell are resistant to the acid.

A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; inserting a pre-machined component into an opening in the metallic foam core; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration and after the pre-machined component has been inserted into the metallic foam core; introducing an acid into an internal cavity defined by the external metallic shell; dissolving the metallic foam core; and removing the dissolved metallic foam core from the internal cavity, wherein the component and the external metallic shell are resistant to the acid.