Abstract: Disclosed is a vibration-reducing and noise-absorbing pipeline assembly with metamaterial characteristics. The assembly comprises a connecting component, a dispersion pipeline, and a flow pipeline, wherein the inner diameter of the dispersion pipeline gradually changes from small to large, and the dispersion pipeline comprises a small port and a large port. The dispersion pipeline further comprises a hose, which communicates with the interior of the flow pipeline. Fluid flows in the pipeline assembly from the connecting component to the dispersion pipeline, via a deflection portion and a guide portion, wherein with reference to a flow direction of the fluid, the deflection portion is located upstream of the guide portion, and the deflection portion is configured for changing the flow direction of the fluid, thus minimizing vibration of the pipeline assembly and damping resonance frequencies.

Abstract: In wire electric discharge machining performed with a wire electrode moved relative to a workpiece based on a desired shape, a command speed is controlled so that the discharge densities per unit distance in circular-arc and straight portions of the desired shape are equal, in consideration of the difference in arc length between a circular-arc portion in a desired shape and the corresponding portion of a machining path, whereby the shape accuracy of the circular-arc portion is improved.

Abstract: A jig for fixing a workpiece used in a wire electric discharge machine that machines the workpiece by moving a wire electrode and the workpiece relative to each other, has a table fixing portion for fixing the jig on a table of the wire electric discharge machine and a workpiece fixing portion which is provided with an opening through which the wire electrode extends, and onto which the workpiece disposed on the opening so as to cover the opening is fastened with a fastening member in the opening direction of the opening.

Abstract: A wire electric discharge machine corrects a machining route according to an angle between two moving blocks that form a corner portion. A correction distance and a return distance are computed based on a detected corner angle. The correction is implemented so that an end point of a block to be machined first is extended according to the correction distance, and a portion extending from a start point of a block to be machined subsequently to an intermediate point of this block is removed according to the return distance. A machining route is created so that the end point of the new block created by the extension is connected to the start point of the other block created by the removal, and the wire electrode is moved along the machining route relative to a workpiece.

Abstract: A control unit of a wire cut discharge machine with machining information management function determines an item set to be a facility setting item and inhibits change of the setting value of the item set to be the facility setting item, when a machining information stored in a machining information storing unit is called to and all setting values of the called machining information are set altogether.

Abstract: In wire electric discharge machining performed with a wire electrode moved relative to a workpiece based on a desired shape, a command speed is controlled so that the discharge densities per unit distance in circular-arc and straight portions of the desired shape are equal, in consideration of the difference in arc length between a circular-arc portion in a desired shape and the corresponding portion of a machining path, whereby the shape accuracy of the circular-arc portion is improved.

Abstract: A wire electric discharge machine corrects a machining route according to an angle between two moving blocks that form a corner portion. A correction distance and a return distance are computed based on a detected corner angle. The correction is implemented so that an end point of a block to be machined first is extended according to the correction distance, and a portion extending from a start point of a block to be machined subsequently to an intermediate point of this block is removed according to the return distance. A machining route is created so that the end point of the new block created by the extension is connected to the start point of the other block created by the removal, and the wire electrode is moved along the machining route relative to a workpiece.