Abstract:
PURPOSE: A roll-type structure with a micro and nano dual structure using electric discharge machining(EDM) and an apparatus for forming the micro and nano dual structure on the surface of a base substrate using the same are provided to prevent the surface defects of the structure and to guarantee excellent sustainability and easy manufacturing work by directly forming a micro and nano dual structure on the surface of the structure with EDM. CONSTITUTION: A roll-type structure(200) has a micro pattern(210) and a nano surface roughness(220) on the surface thereof. The micro pattern is formed by EDM using a wire. The nano surface roughness is formed on the surface of the structure by sparks generating in the EDM process for forming the micro patterns.
Abstract:
PURPOSE: A method for forming a micro and nano dual structure using electric discharge machining(EDM) is provided to easily form a micro and nano dual structure on a surface of a flat or curved structure because a table is finely driven by operating a driving unit with a control unit. CONSTITUTION: A method for forming a micro and nano dual structure using EDM is as follows. Micro patterns are formed on the surface of a structure by the EDM using a wire(142). Nano surface roughness is formed on the surface of the structure due to sparks generated in the EDM process to form the micro and nano dual structure on the surface of the structure. [Reference numerals] (100) Driving unit; (150) Power supply unit
Abstract:
PURPOSE: An EDM(Electrical Discharge Machining) apparatus using spray is provided to prevent the abrasion of a tool by performing electrical discharge machining using deionized water. CONSTITUTION: An EDM(Electrical Discharge Machining) apparatus using spray comprises a stage(24), a jig(26), a sprayer(10), and a discharge circuit(20). A workpiece(W) is placed on the stage. The jig forms a gap between the jig and the workpiece and has a tool(T) for electrical discharge machining. The sprayer sprays a spray-type processing medium(M) on the gap. The discharge circuit applies voltage to the gap.
Abstract:
PURPOSE: A modular mobile terminal operating a module of a mobile terminal through cable is provided to produce the customized mobile terminal by combining a keypad and a display device. CONSTITUTION: A supplementary function module(30) for a supplementary function for a memory card slot, a DMB(Digital Multimedia Broadcasting), an MP3 or a camera is combined in a mobile terminal body. A supplementary function module combining unit(32) and a supplementary function module data connection terminal(31) are connected to a rear combining unit. A data communications cable is installed within the clothing.