SEIBU ELECTRIC & MACHINERY CO., LTD. Patent applications |
Patent application number | Title | Published |
20140203000 | PROCESS FOR IDENTIFYING EXISTENCE OF PARTIALLY WELDED SPOTS AND RETENTION OF CUT-OUT PART IN WIRE-CUT ELECTRICAL DISCHARGE MACHINING - A process for identifying existence of a welded spot on a cut-out part and retention of the cut-out part on a workpiece in a wire electrode is disclosed which makes it possible to go ahead process steps while identifying automatically the retention of the cut-out part on a workpiece, ensuring unmanned work of the wire electrode discharge processor with saving the personnel and labor. The process comprises a rough cutting step to cut out the part from the workpiece, a welding step to partially weld the part with the workpiece, and an inspection step to detect whether the wire electrode comes into contact with a welded spot while moving the wire electrode along the cutting path of kerf in the workpiece. After the wire electrode has come into contact with the welded spot whereby the retention of the part on the workpiece has been identified, a step goes ahead to one of next procedures. On the other, after the wire electrode has come into no contact with the welded spot whereby no retention of the part on the workpiece has been identified, a step goes ahead to generate an alarm and the wire electrical discharge is ceased. | 07-24-2014 |
20120235618 | ACTUATOR - There is provided an actuator in which an worm is rotationally driven by an electric motor, and in which an angular velocity of the electric motor is repeatedly fluctuated so that the rotation of the worm is carried out as if the worm is oscillated in the rotational direction thereof, to thereby decrease contact friction of the worm against a worm wheel, resulting in an improvement of an efficiency of force transmission of the worm gear mechanism. | 09-20-2012 |
20120199767 | ACTUATOR AND POSITION-DETECTING METHOD THEREFOR - In an actuator, an electric power supply to a position-detecting detector for an object to be driven can be carried out in a timely manner during a power failure to thereby suppress an electric power consumption in the position-detecting detector, whereby duration time of a power-failure compensation battery can be prolonged, and a variety of detectors can be selected and utilized without limitation in accordance with a use environment and usefulness. During the power failure, a switching means | 08-09-2012 |
20120193326 | METHOD OF CUTTING OUT PART WITH MAKING PARTIALLY WELDED SPOTS IN WIRE-CUT ELECTRICAL DISCHARGE MACHINING - A method of cutting out a part from a workpiece with making partially welded spots in wire electrical discharge machining to keep the part against falling apart away from the workpiece. There is no need to cut anew the welded spot left as in the conventional process. The cut-out parts are cut off at a time after breakage of the welded spots caused by an external impact. The electric processing condition applied across an inter-electrode space between the wire electrode and the workpiece is changed from a cutting phase to a welding phase in which the wire electrode is fused partially at some spots along a cutting path of a predetermined contour on the workpiece to weld together the cut-out part and the workpiece at the fused spot on the wire electrode. | 08-02-2012 |