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1. 发明申请

US20120228270A1 ELECTRIC DISCHARGE MACHINE 有权
标题翻译：电动排料机
公开(公告)号：US20120228270A1
公开(公告)日：2012-09-13
申请号：US13282872
申请日：2011-10-27
申请人： Masao MURAI , Yasuo ARAKAWA , Tomoyuki FURUTA
发明人： Masao MURAI , Yasuo ARAKAWA , Tomoyuki FURUTA
IPC分类号： B23H1/00 , B23H1/02
CPC分类号： B23H1/022 , B23H1/024 , B23H7/04
摘要： An electric discharge machine includes a machining power supply for applying a voltage to a machining gap between a machining electrode and its opposite workpiece and detecting a contact between the machining electrode and the workpiece. The machining power supply includes a first power supply circuit whose output voltage is equal to or less than an arc voltage, a second power supply circuit for supplying a pulse current to the machining gap, and a control unit. When the first power supply circuit detects a contact between the machining electrode and the workpiece, the control unit operates to supply a pulse current from the second power supply circuit to the machining gap while the machining electrode and the workpiece are in contact with each other.
摘要翻译：放电加工机包括：加工电源，用于向加工电极与其相对的工件之间的加工间隙施加电压，并检测加工电极与工件之间的接触。加工电源包括输出电压等于或小于电弧电压的第一电源电路，用于向加工间隙提供脉冲电流的第二电源电路和控制单元。当第一电源电路检测到加工电极和工件之间的接触时，控制单元操作以在加工电极和工件彼此接触的同时将来自第二电源电路的脉冲电流提供给加工间隙。

2. 发明申请

US20120048833A1 WIRE ELECTRIC DISCHARGE MACHINE CAPABLE OF DETECTING MACHINING STATE 有权
标题翻译：用于检测加工状态的电线放电机
公开(公告)号：US20120048833A1
公开(公告)日：2012-03-01
申请号：US13151769
申请日：2011-06-02
申请人： Akiyoshi KAWAHARA , Masao MURAI , Tomoyuki FURUTA
发明人： Akiyoshi KAWAHARA , Masao MURAI , Tomoyuki FURUTA
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H1/024 , B23H7/04
摘要： A voltage is applied to a machining gap between a wire electrode and a workpiece for a period of one microsecond or less with a quiescent time longer than the duration of voltage application between each two adjacent cycles of voltage application provided, and the number of duty cycles and a machining-gap voltage are detected. An open-circuit state in which electric discharge does not occur after the voltage is applied is identified by the detected machining-gap voltage, and the number of open-circuits is counted. An average machining-gap voltage is obtained based on the numbers of duty cycles and open-circuits and the supply voltage or an average voltage for each duty cycle.
摘要翻译：电压施加到线电极和工件之间的加工间隙1微秒或更小，其静态时间长于提供的每两个相邻电压施加周期之间的电压施加持续时间，并且占空比数并检测加工间隙电压。通过检测到的加工间隙电压来识别在施加电压之后不发生放电的开路状态，并计数开路次数。基于占空比和开路次数以及每个占空比的电源电压或平均电压获得平均加工间隙电压。

3. 发明申请

US20120001577A1 TORQUE MOTOR DRIVING DEVICE FOR WIRE CUT ELECTRICAL DISCHARGE MACHINES 有权
标题翻译：用于线切割放电机的扭矩电机驱动装置
公开(公告)号：US20120001577A1
公开(公告)日：2012-01-05
申请号：US13038437
申请日：2011-03-02
申请人： Tomoyuki FURUTA , Akiyoshi KAWAHARA , Masao MURAI
发明人： Tomoyuki FURUTA , Akiyoshi KAWAHARA , Masao MURAI
IPC分类号： H02P23/03
CPC分类号： B23H7/14 , B23H7/26 , B23H11/00 , H02M5/293 , H02P23/03
摘要： In a torque motor driving device for wire cut electrical discharge machines, a voltage waveform rectified by a full-wave rectifying circuit, not using a high-capacitance electrolytic capacitor, is applied as an AC voltage to a single-phase torque motor by a bridge circuit including semiconductor switches. A PWM signal whose duty is adjusted so that the current flowing through the torque motor matches an instructed value is generated and the generated PWM signal is used for the operation of the bridge circuit.
摘要翻译：在用于线切割放电机的转矩电动机驱动装置中，通过不使用高电容电解电容器的全波整流电路整流的电压波形作为交流电压施加到单相转矩电动机的桥上电路包括半导体开关。产生调节占空比的PWM信号，使得流过转矩电动机的电流与指示值相匹配，并且生成的PWM信号用于桥式电路的操作。

4. 发明申请

US20080173617A1 ELECTRIC DISCHARGE MACHINING APPARATUS 审中-公开
标题翻译：电动放料加工设备
公开(公告)号：US20080173617A1
公开(公告)日：2008-07-24
申请号：US11944568
申请日：2007-11-23
申请人： Masao MURAI , Akihiro SAKURAI
发明人： Masao MURAI , Akihiro SAKURAI
IPC分类号： B23H1/02
CPC分类号： B23H11/006 , B23H1/02
摘要： A voltage measurement circuit is connected between an electrode and a workpiece by a parallel cable through a resistor to measure a machining gap voltage. The parallel cable, like a television antenna feeder line, is formed such that two conductive wires are parallel fixed by an insulating and flexible material such as rubber or resin with a predetermined distance. The interline distance of the parallel cable is increased to decrease a stray capacitance of the cable, so that a high-frequency voltage in finish machining can be measured by the voltage measurement circuit without being attenuated. The resistor is connected to suppress oscillation of a voltage input to the voltage measurement circuit.
摘要翻译：电压测量电路通过并联电缆通过电阻器连接在电极和工件之间，以测量加工间隙电压。平行电缆，如电视天线馈线，形成为两条导线由绝缘和柔性材料如橡胶或树脂以预定距离平行固定。并联电缆的行间距离增加以减小电缆的杂散电容，从而可以通过电压测量电路测量精加工中的高频电压而不被衰减。电阻器被连接以抑制输入到电压测量电路的电压的振荡。

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