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公开(公告)号：US09744608B2
公开(公告)日：2017-08-29
申请号：US14584502
申请日：2014-12-29
申请人： FANUC Corporation
CPC分类号： B23H1/022 , B23H7/02 , B23H7/04 , B23H2600/12
摘要： A primary power supply charges a capacitor by turning on a switching element and, upon completion of charging, turns off the switching element. Then, an AC pulse voltage is applied to the gap between a wire electrode and a workpiece by alternately turning on and off a switching element present in a secondary power supply. After a dielectric breakdown occurs between the wire electrode and the workpiece, the switching element is turned on to connect the capacitor so that the capacitor supplies a pulse current for machining.
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公开(公告)号：US09446465B2
公开(公告)日：2016-09-20
申请号：US14420403
申请日：2012-10-30
申请人： Yuto Sasaki
发明人： Yuto Sasaki
摘要： A control unit controls an on/off operation of a switching unit such that a first DC pulse voltage is applied across an electrode gap from a pulse-voltage generation unit adjusted to a first impedance, and when a detection unit detects a preliminary discharge, a second DC pulse voltage is applied across the electrode gap from the pulse-voltage generation unit adjusted to a second impedance, which is lower than the first impedance, so as to generate a main discharge in the electrode gap, and during an idle time since the main discharge is completed until the next preliminary discharge is started, a third DC pulse voltage that is equal to or higher than a discharge arc voltage is applied across the electrode gap from the pulse-voltage generation unit adjusted to a third impedance, which is higher than the first impedance.
摘要翻译： 控制单元控制开关单元的开/关操作，使得从调整到第一阻抗的脉冲电压产生单元的电极间隙施加第一DC脉冲电压，并且当检测单元检测到初步放电时， 第二直流脉冲电压施加在电极间隙上，脉冲电压产生单元被调整到低于第一阻抗的第二阻抗，以便在电极间隙中产生主放电，并且在空闲时间内 主放电完成直到下一个初步放电开始，等于或高于放电电弧电压的第三直流脉冲电压被施加到电极间隙上，从调节到第三阻抗的脉冲电压产生单元 比第一阻抗。
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公开(公告)号：US09421626B2
公开(公告)日：2016-08-23
申请号：US13935752
申请日：2013-07-05
摘要： An apparatus for electrical discharge machining modulation control includes an EDM module, an open-circuit voltage modulation module, a reference-voltage modulation and judgment module, a database, and a control unit. The control unit selects a reference voltage, and an open-circuit voltage corresponding to characteristics of a workpiece from the database, and generates and transmits a second control signal to the open-circuit voltage modulation module for modulating the open-circuit voltage, and a third control signal to the reference-voltage modulation and judgment module for modulating the reference voltage utilized to determine if the ignition happened. The open-circuit voltage modulation module receives a first control signal periodically transmitted from the control unit for providing the open-circuit voltage to the EDM module. The reference-voltage modulation and judgment module performs an arc voltage measurement procedure, then the control unit determines the open-circuit voltage and the reference voltage.
摘要翻译： 放电加工调制控制装置包括EDM模块，开路电压调制模块，参考电压调制和判断模块，数据库和控制单元。 控制单元从数据库中选择与工件特性相对应的基准电压和开路电压，并且生成并向开路电压调制模块发送第二控制信号以调制开路电压，以及 参考电压调制和判断模块的第三控制信号，用于调制用于确定点火是否发生的参考电压。 开路电压调制模块接收从控制单元周期性发送的用于向EDM模块提供开路电压的第一控制信号。 参考电压调制和判断模块执行电弧电压测量程序，然后控制单元确定开路电压和参考电压。
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4.发明授权公开(公告)号：US09126277B2
公开(公告)日：2015-09-08
申请号：US13477162
申请日：2012-05-22
CPC分类号： B23H7/04 , B23H1/022 , B23H2300/20
摘要： A power supply device for a wire electric discharge machine is provided with a main DC power source and an auxiliary DC power source with variable voltage. While first pulses are being output, a voltage from the main DC power source is applied to a machining gap between a wire electrode and a workpiece. While second pulses are being output with the output of the first pulses stopped, inductive energy stored by an inductance in a circuit is passed through the gap, and a voltage corresponding to a peak current value provided by the main DC power source is applied to the gap by the auxiliary DC power source. When the output of the second pulses is stopped, the inductive energy is returned to the main DC power source.
摘要翻译： 用于电线放电机的电源装置设置有可变电压的主直流电源和辅助直流电源。 当输出第一脉冲时，来自主DC电源的电压被施加到线电极和工件之间的加工间隙。 当在第一脉冲的输出停止输出第二脉冲时，通过电路中的电感所存储的感应能量通过该间隙，并且将对应于由主DC电源提供的峰值电流值的电压施加到 间隙由辅助直流电源。 当第二脉冲的输出停止时，感应能量返回主DC电源。
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公开(公告)号：US20150196964A1
公开(公告)日：2015-07-16
申请号：US14584502
申请日：2014-12-29
申请人： FANUC Corporation
CPC分类号： B23H1/022 , B23H7/02 , B23H7/04 , B23H2600/12
摘要： A primary power supply charges a capacitor by turning on a switching element and, upon completion of charging, turns off the switching element. Then, an AC pulse voltage is applied to the gap between a wire electrode and a workpiece by alternately turning on and off a switching element present in a secondary power supply. After a dielectric breakdown occurs between the wire electrode and the workpiece, the switching element is turned on to connect the capacitor so that the capacitor supplies a pulse current for machining.
摘要翻译： 主电源通过接通开关元件对电容器充电，并且在充电完成时关断开关元件。 然后，通过交替地接通和断开存在于二次电源中的开关元件，将交流脉冲电压施加到线电极和工件之间的间隙。 在线电极和工件之间发生电介质击穿之后，开关元件导通以连接电容器，使得电容器提供用于加工的脉冲电流。
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公开(公告)号：US08648275B2
公开(公告)日：2014-02-11
申请号：US13128597
申请日：2010-02-26
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H2300/20 , B23H2600/12
摘要： A power supply device comprises a DC power supply (12), a current sensor (14) for detecting gap current (Igap) flowing through the machining gap, a first switching element (16) connected in series between the DC power supply and the tool electrode (2), a first reverse current prevention diode (22) connected in parallel with the DC power supply and connected in series with the first switching element (16), a second switching element (18) connected in series between the DC power supply and the workpiece (3), a second reverse current prevention diode (24) connected in parallel with the DC power supply and connected in series with the second switching element (18), and a pulse controller (20) for controlling the first and second switching elements in response to gap current (Igap). From a first time (t1) when electric discharge is generated across the machining gap, until a second time (t2) when the gap current reaches the peak current during the ON time, both of the first and second switching elements are on. At the second time (t2) only one of the first and second switching elements is turned off.
摘要翻译： 电源装置包括直流电源（12），用于检测流过加工间隙的间隙电流（Igap）的电流传感器（14），串联连接在直流电源和工具之间的第一开关元件（16） 电极（2），与直流电源并联连接并与第一开关元件（16）串联连接的第一反向电流防止二极管（22），串联连接在直流电源 和工件（3），与直流电源并联连接并与第二开关元件（18）串联连接的第二反向电流防止二极管（24），以及用于控制第一和第二 开关元件响应间隙电流（Igap）。 当在加工间隙中产生放电的第一次（t1）时，直到在导通时间期间间隙电流达到峰值电流的第二时间（t2）时，第一和第二开关元件都导通。 在第二时间（t2），第一和第二开关元件中只有一个被关断。
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7.发明申请公开(公告)号：US20130292360A1
公开(公告)日：2013-11-07
申请号：US13980466
申请日：2011-04-12
申请人： Masahiro Okane , Satoshi Suzuki , Kiyohito Oda
发明人： Masahiro Okane , Satoshi Suzuki , Kiyohito Oda
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H2300/20
摘要： The present invention is equipped with a series circuit that includes a DC power supply, switching elements and a diode for supplying DC or AC current pulses to a machining gap between a machining electrode and a workpiece, diodes that regulate a direction of the current flow to one direction, and a control unit that controls the switching elements. When the control unit generates a current pulse having a triangular waveform by an inductance that is present in the series circuit, the control unit controls the switching elements in order that a current-pulse time ratio that is a ratio between the non-current time and the current continuation time in the current pulse is equal to or lower than ⅕.
摘要翻译： 本发明装备有串联电路，该串联电路包括直流电源，开关元件和用于向加工电极和工件之间的加工间隙提供直流或交流电流脉冲的二极管，调整电流方向的二极管 一个方向，以及控制开关元件的控制单元。 当控制单元通过存在于串联电路中的电感产生具有三角波形的电流脉冲时，控制单元控制开关元件，以便将电流脉冲时间比作为非当前时间和非当前时间之间的比率 电流脉冲当前的持续时间等于或小于1/5。
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8.发明授权公开(公告)号：US08222557B2
公开(公告)日：2012-07-17
申请号：US12532115
申请日：2008-03-24
申请人： Yuji Kaneko , Takenori Harada
发明人： Yuji Kaneko , Takenori Harada
IPC分类号： B23H1/00
CPC分类号： B23H1/022
摘要： An electric discharge machining apparatus having a gate signal generator for generating a gate signal, a power source for applying a voltage across a work gap formed between a tool electrode and a workpiece, a gap voltage detector for detecting a gap voltage of the work gap, an electric discharge detector for supplying an electric discharge detection signal representing electric discharge to the gate signal generator. The electric discharge detector includes a counter for generating a sample clock having a frequency greater than the frequency of the gate signal, and a comparator for receiving the gap voltage and determining that a fall in the gap voltage is larger than a specified voltage difference in each sample clock. The electric discharge detection signal is generated in response to an output signal of the comparator.
摘要翻译： 一种放电加工装置，具有用于产生栅极信号的栅极信号发生器，用于在形成在工具电极和工件之间的工作间隙上施加电压的电源，用于检测工作间隙的间隙电压的间隙电压检测器， 放电检测器，用于将表示放电的放电检测信号提供给门信号发生器。 放电检测器包括：计数器，用于产生具有大于门信号频率的频率的采样时钟;以及比较器，用于接收间隙电压并确定间隙电压的下降大于每个中的指定电压差 抽样时钟。 响应于比较器的输出信号产生放电检测信号。
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公开(公告)号：US08093526B2
公开(公告)日：2012-01-10
申请号：US12374956
申请日：2006-10-24
CPC分类号： B23H7/04 , B23H1/022 , B23H7/14 , B23H2300/20
摘要： A wire electric discharge machine includes a wire electrode; a machining power supply that supplies a machining current to between the wire electrode and a workpiece. The machine further includes a first power feed contact and a second power feed contact that respectively feed power to the wire electrode; a first machining-current loop in which a first machining current flows from the first power feed contact toward the workpiece; a second machining-current loop in which a second machining current flow from the second power feed contact toward the workpiece; an impedance switching circuit that is provided in at least any one of the first machining-current loop and the second machining-current loop; and a control unit that controls a flow ratio of the first machining current and the second machining current by changing an impedance of the impedance switching circuit.
摘要翻译： 线放电机包括线电极; 加工电源，其向线电极和工件之间提供加工电流。 该机器还包括分别向线电极供电的第一供电触点和第二供电触点; 第一加工电流回路，其中第一加工电流从第一供电触头朝向工件流动; 第二加工电流回路，其中第二加工电流从所述第二供电触头流向所述工件; 阻抗切换电路，其设置在所述第一加工电流回路和所述第二加工电流回路中的至少任一个中; 以及控制单元，其通过改变阻抗切换电路的阻抗来控制第一加工电流和第二加工电流的流量比。
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公开(公告)号：US20100294743A1
公开(公告)日：2010-11-25
申请号：US12864195
申请日：2008-01-31
IPC分类号： B23K15/00
CPC分类号： B23H1/022
摘要： To provide an electric discharge device capable of performing an optimum process that achieves a high-quality process in a satisfactory quality of processing precision and the like. In an electric discharge device that processes a workpiece by electric discharge, a reserve electric-discharge pulse is applied by alternately switching between a positive polarity and a reverse polarity, and a current waveform shape of a main electric-discharge pulse is differentiated corresponding to a polarity of a reserve electric-discharge pulse, to a main electric-discharge pulse to be applied after detecting electric discharge following the reserve electric-discharge pulse. With this arrangement, a processing current shape can be optimized corresponding to an electric discharge characteristic, and thus a high-precision process can be performed.
摘要翻译： 提供一种能够以令人满意的加工精度等进行优质加工的最佳工序的放电装置。 在通过放电处理工件的放电装置中，通过在正极性和反极性之间交替切换来施加保留放电脉冲，并且主放电脉冲的电流波形形状对应于 保留放电脉冲的极性与在保留放电脉冲之后检测到放电后施加的主放电脉冲。 通过这种布置，可以根据放电特性来优化处理电流形状，因此可以进行高精度处理。
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