Seibu Electric Machinery Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Yoshihiro Ito

Takashi Mitsuyasu

Takayasu Sakatani

Hiroaki Fujii

Takao Araki

A wire electrode feeding apparatus or the like is provided, suitable for feeding a wire electrode along its original path without deviating from its original path. A conversion unitfeeds the wire electrode from a feeding inletto a feeding outletusing a machining liquid. A rollerchanges the feeding direction of the wire electrode. A discharging unitdischarges the machining liquid toward the feeding outletin a direction tangential to the contact face of the roller, to generate a flow of the machining liquid. On the other hand, a diverted flow path for the machining liquid is defined along the contact face of the rollerfrom the feeding outletside to the feeding inletside. An intake unittakes in air according to the pressure of the machining liquid to supply the air to the diverted flow path.

Wire electrode feeding apparatus and wire electrode feeding method

It is a purpose of the present invention to provide a wire electrical discharge machining system allowing a wire electrical discharge machining device and a robot to operate in conjunction with each other with high efficiency. A wire electrical discharge machining systemincludes wire electrical discharge machining devices, and, and a robot unitthat mounts a workpiece on the wire electrical discharge machining device. The wire electrical discharge machining devices, andmay each perform either rough machining with supported cores or finishing machining after the cores are removed. Subsequently, core processing may be performed by means of a corresponding dedicated apparatus. Also, the core processing may be performed by means of a single common apparatus. The robot unitmounts and collects the workpiece so as to allow these wire electrical discharge machining apparatuses to effectively operate, thereby providing wire electrical discharge machining with improved efficiency for the overall system.

Wire electrical discharge machining system, wire electrical discharge machining method, and workpiece measurement method

A wire electrical discharge machining system allows a wire electrical discharge machining device and a robot to operate in conjunction with each other with high efficiency. A wire electrical discharge machining systemincludes wire electrical discharge machining devices, and, and a robot unitthat mounts a workpiece on the wire electrical discharge machining device. The wire electrical discharge machining devices, andmay each perform either rough machining with supported cores or finishing machining after the cores are removed. Subsequently, core processing may be performed by a corresponding dedicated apparatus. Also, the core processing may be performed by a single common apparatus. The robot unitmounts and collects the workpiece so as to allow these wire electrical discharge machining apparatuses to effectively operate, thereby providing wire electrical discharge machining with improved efficiency for the overall system.

The present invention provides a wire electrode supply apparatus for suppressing wire electrode driving vibration for wire electrodes having a wide range of diameters and formed of various materials, thereby improving processed surface roughness. The wire electrode supply apparatus includes a back tension adjustment unit that adjusts a back tension of the wire electrode drawn from a source bobbin, a tension applying unit, and a constant pressure ejecting unit that ejects the wire electrode with constant pressure and rate after the transference via the tension applying unit and an electrical discharge machining unit. The tension applying unit includes a low tension applying unit that applies a tension to the wire electrode, and a high tension applying unit that can supply a higher tension. After the high tension applying unit supplies a tension, the low tension applying unit supplies a tension. Otherwise, only the low tension applying unit supplies a tension.

Wire electrode supply apparatus and wire electrode supply method

A document feeder comprises a hopper table on which documents are to be mounted, a feeding roller for transporting the documents mounted on the hopper table, and lifting system for raising and lowering the hopper table to position the topmost sheet of the documents mounted on the hopper table at a level of the feeding roller. The lifting system includes a hopper motor, and a drive mechanism for raising and lowering the hopper table by means of the driving force. The drive mechanism swings the hopper table when the hopper table is located between an lower limit position and a switching position above the lower limit position, or moves the hopper table vertically with maintaining its posture horizontally when the hopper table is located between the switching position and an upper limit position above the switching position. In addition, the height and the slant angle of the feeding roller sequentially conform to the movement of the hopper table in order to prevent jamming.

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Fukuoka, Japan

Yoshihiro Ito