A wire electric-discharge machining device includes a control unit that selects a cutting wire to which a pulse voltage is applied by a pulse-voltage generation unit on a basis of an angle formed between an end face of a workpiece and a plane including a plurality of cutting wires, which are not parallel to the end face, an interval between parallel cutting wires, and a relative distance between the cutting wires and the workpiece. A drive unit drives a workpiece in a direction not vertical to the plane including the cutting wires, and the workpiece is cut by electric-discharge machining by applying a pulse voltage.

A core image acquiring unit is mounted at a position where the core image acquiring unit looks down at a workpiece on a table, such as an upper guide unit of a wire electric discharge machine, the core machining is performed, while fixing the core using a core fixing function, at a stage in which machining is completed to the end point of the machining path of cutting the core, the core and the workpiece are picked up by the core image acquiring unit, from the captured image, it is determined whether a machining groove has a constant width, or adhesion and deposition of machining debris are present in the machining groove, or the core is fixed by a difference in states of the surface light between the core and the workpiece.

A machining pass generating apparatus for a wire electric discharge machine, which is configured to generate a machining pass for machining a key groove on a side surface of a round hole, includes a processor. The processor is configured to define a shape of the key groove to be machined, designate a diameter of the round hole, designate a position of the round hole, and generate a machining pass, the pass suppresses an opening of the key groove from being narrowed.

A machining pass generating apparatus for a wire electric discharge machine, which is configured to generate a machining pass for machining a key groove on a side surface of a round hole, includes a processor. The processor is configured to define a shape of the key groove to be machined, designate a diameter of the round hole, designate a position of the round hole, and generate a machining pass, the pass suppresses an opening of the key groove from being narrowed.

When a Z axis is moved while interrupting or continuing taper machining, a wire electric discharge machining control apparatus controls position of a UV axis by re-creating a taper deviation vector, based on a distance between upper and lower guides, such that a wire tilt angle does not change.

A CAM apparatus includes: an input receiving unit that receives designation of a part where core fixing machining is performed in a machining shape forming a core and divides the machining shape into a first machining shape element for which the core fixing machining is performed and a second machining shape element, which is connected to the first machining element and for which the core fixing machining is not performed, a machining-condition setting unit that allocates a first electric condition for the core fixing machining to the first machining shape element and allocates a second electric condition to the second machining shape element, and a machining-program generating unit that generates a machining program for machining the second machining shape element under the second electric condition and continuously machining the first machining shape element under the first electric condition after the machining of the second machining shape element.

A wire electrical discharge machining apparatus includes an NC control device, and the NC control device determines, during taper machining, whether the type of machining is a type (first type) in which an upper die is located on a workpiece side in comparison with a lower die or a type (second type) in which the upper die is located on the side opposite to the workpiece in comparison with the lower die on the basis of a machining program and corrects the positional relationship between the upper die and the lower die in accordance with the determined type of machining.

A wire electrical discharge machining apparatus includes an NC control device, and the NC control device determines, during taper machining, whether the type of machining is a type (first type) in which an upper die is located on a workpiece side in comparison with a lower die or a type (second type) in which the upper die is located on the side opposite to the workpiece in comparison with the lower die on the basis of a machining program and corrects the positional relationship between the upper die and the lower die in accordance with the determined type of machining.

A machining program creation apparatus for a wire electrical discharge machine for creating a machining program for cutting a predetermined machining shape in an object to be machined includes a first unit defining the machining shape; a second unit defining a shape of the object to be machined; a third unit designating a reference position to be used when the machining shape is machined; a fourth unit for generating a first machining path for cutting the machining shape based on the machining shape, the shape of the object to be machined, and the machining reference position; a fifth unit for generating the shape of the object to be machined as a second machining path based on the shape of the object to be machined and the machining reference position; and a sixth unit for drawing the first and the second machining paths on the same screen.

A machining program creation apparatus for a wire electrical discharge machine for creating a machining program for cutting a predetermined machining shape in an object to be machined includes a first unit defining the machining shape; a second unit defining a shape of the object to be machined; a third unit designating a reference position to be used when the machining shape is machined; a fourth unit for generating a first machining path for cutting the machining shape based on the machining shape, the shape of the object to be machined, and the machining reference position; a fifth unit for generating the shape of the object to be machined as a second machining path based on the shape of the object to be machined and the machining reference position; and a sixth unit for drawing the first and the second machining paths on the same screen.