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1. 发明申请

WO1995000277A1 WIRE-CUT ELECTRICAL DISCHARGE MACHINE 审中-公开
标题翻译：电线切断电机
公开(公告)号：WO1995000277A1
公开(公告)日：1995-01-05
申请号：PCT/JP1994000830
申请日：1994-05-24
申请人： FANUC LTD
发明人： FANUC LTD , SAKURAI, Akihiro
IPC分类号： B23H01/02
CPC分类号： B23H1/022 , B23H2300/20 , B23H2300/22
摘要： A wire-cut electrical discharge machine capable of controlling a discharge current to constant. Provided between a main current power source (71) and a capacitor (C) is a current detecting unit (72) which converts electric current (I3) flowing through a closed circuit formed by the main current power source (71) and the capacitor (C) into voltage to detect the same, and the detected result is transmitted to a control unit (500) after it is smoothed by a smoothing circuit unit (73). Also, electric discharge between a wire (49) and a work (36) is detected by a discharge detecting unit (62). A processing unit (52) of the control unit (500) calculates a sum of the electric current (I3) per one cycle of electric discharge machining on the basis of the converted voltage value of the electric current (I3) transmitted through the smoothing circuit unit (73) and the number of electric discharges counted by a counting unit (53). The discharge control unit (55) controls a pulse width of a drive signal (SS) being fed to a main current switches (S2, S3) so that the sum of the electric current (I3) per one cycle of electric discharge machining amounts to a reference value. Accordingly, an appropriate drive signal (SS) can be output taking into consideration temperature changes during an operational lag time of the main current switches (S2, S3), so that it is possible to readily maintain discharge currents (I2a, I2b) at desired values.
摘要翻译：一种能够将放电电流控制为恒定的线切割放电机。在主电流源（71）和电容器（C）之间设置有电流检测单元（72），其转换流经由主电流源（71）和电容器（71）形成的闭合电路的电流（I3） C）进行电压检测，并且在被平滑电路单元（73）平滑后，将检测结果发送到控制单元（500）。此外，由放电检测单元（62）检测线（49）和工件（36）之间的放电。控制单元（500）的处理单元（52）基于通过平滑电路传输的电流（I3）的转换电压值，计算每一个放电加工周期的电流（I3）之和单元（73）和由计数单元（53）计数的放电次数。放电控制单元（55）控制馈送到主电流开关（S2，S3）的驱动信号（SS）的脉冲宽度，使得每一个放电加工循环的电流（I3）之和等于参考值。因此，考虑到主电流开关（S2，S3）的运行滞后时间期间的温度变化，可以输出适当的驱动信号（SS），使得可以容易地将放电电流（I2a，I2b）保持在期望值值。

2. 发明申请

WO1995010382A1 CONCENTRATED ELECTRIC DISCHARGE JUDGEMENT METHOD AND APPARATUS FOR WIRE ELECTRIC DISCHARGE MACHINES 审中-公开
标题翻译：电力放电机集中放电判定方法及装置
公开(公告)号：WO1995010382A1
公开(公告)日：1995-04-20
申请号：PCT/JP1994001686
申请日：1994-10-07
申请人： FANUC LTD
发明人： FANUC LTD , SAKURAI, Akihiro
IPC分类号： B23H01/02
CPC分类号： B23H7/04
摘要： In a wire electric discharge machine constructed so that an electric current is supplied from the upper and lower sides of a work (2) to a wire electrode (1) through current supply elements (4, 5), a concentrated electric discharge judgement method and apparatus are provided, which are provided with means (6, 7) for detecting the current flowing in these two current supply elements (4, 5), a means (8) for detecting a total dischage current, and means (9-19) for detecting a difference between discharge positions of two consecutive electric discharge operations by using outputs from the current detecting means (6, 7) and an output from the total current detecting means (8), which outputs are obtained by two consecutive discharge operations, a concentrated electric discharge judgement apparatus being formed which is adapted to judge concentrated electric discharge on the basis of the outputs from the discharge position difference detecting means, the mentioned method and apparatus being capable of detecting the presence and absence of concentrated discharge by using a smaller number of structural elements; reduced numbers of comparators and reference voltage sources.
摘要翻译：在一种电线放电机中，通过电流供给元件（4,5）从工件（2）的上侧和下侧向线电极（1）供电，集中放电判断方法和设置有用于检测在这两个电流源元件（4,5）中流动的电流的装置（6,7），用于检测总放电电流的装置（8），以及装置（9-19）用于通过使用来自电流检测装置（6,7）的输出和来自总电流检测装置（8）的输出来检测两个连续放电操作的放电位置之间的差异，该输出是通过两次连续放电操作获得的，形成了用于基于来自排出位置差检测装置的输出来判断集中放电的集中放电判断装置，所述方法和装置为c 通过使用较少数量的结构元件来检测集中排放的存在和不存在; 减少比较器和参考电压源的数量。

3. 发明申请

WO1995006536A1 POWER SOURCE APPARATUS FOR ELECTRICAL DISCHARGE MACHINING 审中-公开
标题翻译：用于电力放电加工的电源设备
公开(公告)号：WO1995006536A1
公开(公告)日：1995-03-09
申请号：PCT/JP1994001355
申请日：1994-08-16
申请人： FANUC LTD
发明人： FANUC LTD , IZUMIYA, Syunzo , MURAI, Masao , SAKURAI, Akihiro , KAWAHARA, Akiyoshi
IPC分类号： B23H01/02
CPC分类号： B23H1/022
摘要： A power source apparatus for electrical discharge machining, adapted to accurately detect the starting of normal electric discharge between electrodes, and switch an auxiliary power source to a primary power source. A switch (3) is turned on by a signal S1 from a control unit to apply a voltage of an auxiliary power source (1) between a work (5) and a machining electrode (6), and the voltage Vw between the electrode starts increasing. When the insulation recovery is sufficient, a partial voltage Vwd at the node between voltage dividing resistors (7, 8) exceeds a reference voltage V1, and the level of an output C1 from a comparator (9) becomes high, so that a SR flip-flop (14) is set. When the voltage Vw between the electrodes decreases due to the generation of electric discharge, the partial voltage Vwd becomes lower than a reference voltage V2, and the level of an output C2 from a comparator (10) becomes low, so that the level of the inverted signal C3 from an inverter (13) becomes high. Consequently, the SR flip-flop (14) is reset, and the level of an output C4 changes from high to low. A monostable multivibrator (15) detects the fall of the output C4 and outputs a signal C5 indicating the detection of a discharge.
摘要翻译：一种用于放电加工的电源装置，适于准确地检测电极之间的正常放电的开始，并将辅助电源切换到主电源。开关（3）通过来自控制单元的信号S1导通，以在工件（5）和加工电极（6）之间施加辅助电源（1）的电压，并且电极之间的电压Vw 越来越多。当绝缘恢复足够时，分压电阻器（7,8）之间的节点处的部分电压Vwd超过参考电压V1，并且来自比较器（9）的输出C1的电平变高，使得SR翻转 -flop（14）被设置。当电极的电压Vw由于放电产生而降低时，部分电压Vwd变得低于基准电压V2，并且来自比较器（10）的输出C2的电平变低，来自逆变器（13）的反相信号C3变高。因此，SR触发器（14）被复位，并且输出C4的电平从高变为低。单稳态多谐振荡器（15）检测输出C4的下降并输出指示放电检测的信号C5。

4. 发明公开

EP0147473A1 POWER SOURCE FOR ELECTRICAL DISCHARGE MACHINING 失效
标题翻译：电源电火花工具。
公开(公告)号：EP0147473A1
公开(公告)日：1985-07-10
申请号：EP84902377.5
申请日：1984-06-19
申请人： FANUC LTD.
发明人： OBARA, Haruki , IZUMIYA, Shunzo 129-408, Green Hill-Terada , OKUYAMA, Yuji , SAKURAI, Akihiro
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H2300/20
摘要： A power source for electrical discharge machining has a switching element (Q,) inserted into a circuit which discharges a capacitor (Co). The discharge voltage of the capacitor (Co) is detected from a terminal (a) and when the discharge voltage exceeds a reference voltage, charging of the capacitor (Co) is halted, and the switching element (Q 1 )is turned on. The discharge current of the capacitor (Co) is detected by a detector (5), and when discharge is suspended, the switching element (Q 1 ) is turned off so as to stabilize the discharge as well as prevent damage to the switching element (Q,). When a predetermined period of time has elapsed thereafter, the charging of the capacitor (Co) is resumed.

5. 发明公开

EP1946872A2 Electric discharge machining apparatus 审中-公开
标题翻译： Vorrichtung zur Funkenerosion
公开(公告)号：EP1946872A2
公开(公告)日：2008-07-23
申请号：EP07121739.2
申请日：2007-11-28
申请人： FANUC LTD
发明人： MURAI, Masao , SAKURAI, Akihiro
IPC分类号： B23H1/02 , B23H11/00
CPC分类号： B23H11/006 , B23H1/02
摘要： A voltage measurement circuit (4) is connected between an electrode (1) and a workpiece (2) by a parallel cable (3) through a resistor (R) to measure a machining gap voltage. The parallel cable (3), 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（4）通过并联电缆（3）通过电阻（R）连接在电极（1）和工件（2）之间，以测量加工间隙电压。平行电缆（3）像电视天线馈线一样被形成为使得两条导线通过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降低电缆的杂散电容，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。

6. 发明授权

EP0147473B1 POWER SOURCE FOR ELECTRICAL DISCHARGE MACHINING 失效
标题翻译：电力放电电源
公开(公告)号：EP0147473B1
公开(公告)日：1989-12-20
申请号：EP84902377.5
申请日：1984-06-19
申请人： FANUC LTD.
发明人： OBARA, Haruki , IZUMIYA, Shunzo 129-408, Green Hill-Terada , OKUYAMA, Yuji , SAKURAI, Akihiro
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H2300/20
摘要： A power source for electrical discharge machining has a switching element (Q1) inserted into a circuit which discharges a capacitor (Co). The discharge voltage of the capacitor (Co) is detected from a terminal (a) and when the discharge voltage exceeds a reference voltage, charging of the capacitor (Co) is halted, and the switching element (Q1) is turned on. The discharge current of the capacitor (Co) is detected by a detector (5), and when discharge is suspended, the switching element (Q1) is turned off so as to stabilize the discharge as well as prevent damage to the switching element (Q1). When a predetermined period of time has elapsed thereafter, the charging of the capacitor (Co) is resumed.

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