Abstract: A method for forming or deforming a workpiece at a high speed using electroplasticity effect includes: applying a first level of pulse current to the work piece to cause the electroplasticity effect and lower a flow stress of the work piece; and applying a first level of electromagnetic force to the workpiece for 150˜300 ?s to form or deform the work piece in a desired shape while the flow stress of the work piece is maintained at the lowered level, wherein the first level of electromagnetic force is lower than a second level of electromagnetic force which is required to form or deform the workpiece in the desired shape without applying the first level of pulse current.

Abstract: Disclosed is a dieless sheet forming device including: two forming rollers rotatably disposed up and down to correspond with each other and bent to various curvatures; and a plurality of roller adjustment members whose one ends are fixed to each forming roller in such a manner as to be adjusted in length to adjust the curvatures of the forming rollers and the distances between the two forming rollers, wherein the curvatures of the forming rollers and the distances between the forming rollers through which a sheet to be formed is passed are adjusted to change the forming shape of the sheet. According to the present invention, the forming shapes of the sheet can be easily corrected if the desired shape is changed, so that the sheet forming device can be applied for small quantity batch production, does not generate dimples or wrinkles, can form even the edge portions of the sheet, and can form the sheet without having the limitation on the thickness or size of the sheet.

Abstract: An unmanned aerial vehicle equipped with a spherical locking portion for landing on an unmanned ground vehicle is disclosed. The spherical locking portion can be the body of the unmanned aerial vehicle. Further, an unmanned ground vehicle for landing of an unmanned aerial vehicle, comprising a landing portion configured to have some of a spherical locking portion of the unmanned aerial vehicle inserted therein is disclosed.

Abstract: The present invention relates to a sheet-material forming device and method which can be easily changed in response to modifications and changes in a target shape and which can implement forming even curved surfaces with edges or localized small radiuses of curvature.

Abstract: An unmanned aerial vehicle equipped with a spherical locking portion for landing on an unmanned ground vehicle is disclosed. The spherical locking portion can be the body of the unmanned aerial vehicle. Further, an unmanned ground vehicle for landing of an unmanned aerial vehicle, comprising a landing portion configured to have some of a spherical locking portion of the unmanned aerial vehicle inserted therein is disclosed.