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公开(公告)号：US11213905B2
公开(公告)日：2022-01-04
申请号：US16080204
申请日：2018-01-31
摘要： 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 system 1 includes wire electrical discharge machining devices 7, 11, and 15, and a robot unit 17 that mounts a workpiece on the wire electrical discharge machining device. The wire electrical discharge machining devices 7, 11, and 15 may 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 unit 17 mounts 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.
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公开(公告)号：US10792744B2
公开(公告)日：2020-10-06
申请号：US15723160
申请日：2017-10-02
申请人： FANUC Corporation
发明人： Tomoyuki Furuta
摘要： In a wire electric discharge machine, time from application of a voltage to a machining gap between a workpiece and a wire electrode until occurrence of electric discharge is measured as a discharge delay time, and the measured discharge delay time is integrated over a predetermined measurement period to calculate a discharge delay integrated time. Further, the number of times of the voltage application in the measurement period is counted. An average discharge delay time per voltage application in the measurement period is calculated from the discharge delay integrated time and the number of times of voltage application. The movement of the wire electrode with respect to the workpiece is controlled on the basis of the average discharge delay time.
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公开(公告)号：US20190329342A1
公开(公告)日：2019-10-31
申请号：US16391823
申请日：2019-04-23
申请人： FANUC CORPORATION
发明人： Fuchen Chu
摘要： A wire electrical discharge machine includes: a pulse detection unit configured to detect voltage pulses repeatedly applied between a workpiece and a wire electrode; an instability calculation unit configured to calculate the degree of instability indicating how unstable the discharge state is, by using the number of non-discharge pulses that present no voltage drop due to electrical discharge, among the pulses detected per unit time by a pulse detection unit; and a machining condition changing unit configured to change a machining condition for the workpiece, based on the calculated degree of instability.
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公开(公告)号：US10427233B2
公开(公告)日：2019-10-01
申请号：US15659978
申请日：2017-07-26
申请人： FANUC CORPORATION
发明人： Kousuke Ookubo , Shouta Irie
摘要： A wire electrical discharge machine includes: a mounting table having a placement plane on which a workpiece can be placed; a first guide portion and a second guide portion for stretching a wire electrode therebetween. The first guide portion is integrally equipped with a probe. The relative position in the placement plane between the probe detecting its abutment with the workpiece and the first guide portion before moving the relative position between the first guide portion and the second guide portion is stored as an offset. This offset is corrected based on the tilt information indicating the tilt state of the workpiece relative to the placement plane. Thus, it is possible to obtain the corrected offset in accordance with the tilt state of the workpiece after changing the relative position between the first guide portion and the second guide portion.
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公开(公告)号：US20190240755A1
公开(公告)日：2019-08-08
申请号：US16266568
申请日：2019-02-04
申请人： FANUC CORPORATION
发明人： Masanobu Takemoto , Kaoru Hiraga
CPC分类号： B23H1/024 , B23H7/04 , B23H7/16 , B23H7/20 , G05B19/406 , G05B2219/49326 , G05B2219/50185
摘要： A monitoring device for monitoring an operation condition of a machine tool includes: an information acquiring section that acquires event information generated by operation of the machine tool and state information of the machine tool; a judging section that when, after generation of the event information, there has occurred a predetermined change of state of the machine tool corresponding to content indicated by the event information, judges whether or not the content indicated by the event information has been resolved, based on the event information and the state information; and a notifying section that, in the case where when there has occurred the predetermined change of state of the machine tool corresponding to the content indicated by the event information, it has been judged that the content indicated by the event information has not been resolved, re-notifies of the generated event information.
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公开(公告)号：US10315261B2
公开(公告)日：2019-06-11
申请号：US15676113
申请日：2017-08-14
申请人： FANUC CORPORATION
发明人： Hiroyuki Abe
摘要： A wire electrical discharge machine includes: a supporting member for relatively moving a wire electrode relative to a measurement target; servomotors for moving the supporting member; a setting changer for changing the setting of a directive speed; and a motor controller that controls the servomotors in performing move-and-contact detection for detecting contact between the wire electrode and the measurement target by moving the two relative to each other, so that the wire electrode is moved relative to the measurement target based on the directive speed changed and specified by the setting changer.
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公开(公告)号：US20180200815A1
公开(公告)日：2018-07-19
申请号：US15869790
申请日：2018-01-12
申请人： FANUC CORPORATION
发明人： Tomoaki Matsunaga
摘要： A wire electrical discharge machine includes: a multiple number of switching elements connected in parallel with each other and configured to supply the machining current to the electrode gap to perform electrical discharge machining; a multiple number of switches each connected in series with the associated one of the multiple switching elements and configured to cut off each of the multiple switching elements; and a control device configured to perform control when at least one of the multiple switching elements fails so as to disconnect the failed switching elements by means of the associated switches and also change the machining conditions in accordance with the number of the failed switching elements.
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公开(公告)号：US09950378B2
公开(公告)日：2018-04-24
申请号：US15088186
申请日：2016-04-01
申请人： FANUC Corporation
摘要： In a wire electric discharge machine, a discharge delay time is used to classify the inter-electrode state into three categories; a short-circuit state, small-gap state, and large-gap state. Based on this classification, the magnitude of a machining current supplied from a main discharge circuit is determined. If the discharge delay time is zero (i.e., if no electric discharge is generated) after the lapse of a predetermined time since the start of the application of a machining voltage to an inter-electrode gap by an auxiliary discharge circuit, the inter-electrode gap is determined to be short-circuited by machining chips. Thereupon, a short-circuit machining current is supplied from the main discharge circuit to the inter-electrode gap to remove the machining chips. In this way, establishment of a complete short-circuit state is prevented so that the machining efficiency is improved to increase the machining speed.
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公开(公告)号：US20180088543A1
公开(公告)日：2018-03-29
申请号：US15577184
申请日：2015-05-29
发明人： Tadahiro NAKAMURA , Yayoi ONO
CPC分类号： G05B13/026 , B23H1/02 , B23H7/02 , B23H7/04 , B23H7/20 , G05B2219/31407 , G05B2219/45043
摘要： A machining time-estimating method for a wire electrical discharge machine for estimating the remaining machining time (Tr) during the machining of a workpiece comprises: a step for setting a predicted machining velocity; a step for determining the actual machining velocity; a step for determining an estimated machining velocity so as to incorporate the predicted machining velocity and the actual machining velocity at a specified ratio, that is, a reference ratio; and a step for calculating remaining machining time from the estimated machining velocity. By executing the actual machining velocity-determining step to the remaining machining time-calculating step repeatedly to estimate remaining machining time moment by moment, remaining wire electrical discharge machining time is estimated with reduced error.
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公开(公告)号：US09833854B2
公开(公告)日：2017-12-05
申请号：US13695716
申请日：2011-03-23
CPC分类号： B23H11/003 , B23H7/02 , B23H9/00
摘要： A workpiece retainer retains a workpiece at a time of a cutting process by a wire electric discharge machining device that cuts a workpiece by electric discharge from wire electrodes that are spaced from each other and are arranged in parallel. The workpiece retainer is formed with a fitting portion, into which the workpiece is fitted substantially without any gap, and has an external shape such that at a time of cutting the workpiece retainer together with the workpiece fitted in the fitting portion, a length along the wire electrodes of a portion where the workpiece retainer and the workpiece face the wire electrodes becomes substantially constant during the cutting process of the workpiece.
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