公开(公告)号：WO1995000278A1

公开(公告)日：1995-01-05

申请号：PCT/JP1994000940

申请日：1994-06-09

Applicant: FANUC LTD

Inventor： FANUC LTD ,  IZUMIYA, Syunzo ,  KAWAHARA, Akiyoshi

IPC: B23H01/02

CPC classification number: B23H1/024 ,  B23H7/04

Abstract: An insulation detection circuit (7) senses the insulation between a wire electrode (5) and a work (6) while a machining discharge switching element (3) is on until the element (3) is turned off during or after the capacitor (4) of a power source circuit is charged. When the insulation is good, the switching element (3) is made to conduct and discharge for machining starts. When the insulation is not good, the switching element (3) is not made to conduct, but the charge in the capacitor is caused to flow to a release discharge circuit through a release discharging switching element (8) by turning on the switching element (8). When a current detector (10) detects that the discharge of the capacitor (4) is completed, both of the switching elements (3) and (8) are turned off.

Abstract translation: 当加工放电开关元件（3）导通时，绝缘检测电路（7）感测线电极（5）和工件（6）之间的绝缘，直到元件（3）在电容器（4）之前或之后被断开 ）电源电路被充电。 当绝缘良好时，使开关元件（3）进行导入和放电以进行加工开始。 当绝缘不好时，开关元件（3）不会导通，而是通过接通开关元件（8）使电容器中的电荷通过释放放电开关元件（8）流到释放放电电路 8）。 当电流检测器（10）检测到电容器（4）的放电完成时，开关元件（3）和（8）都断开。

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

Applicant: FANUC LTD

Inventor： FANUC LTD ,  IZUMIYA, Syunzo ,  MURAI, Masao ,  SAKURAI, Akihiro ,  KAWAHARA, Akiyoshi

IPC: B23H01/02

CPC classification number: B23H1/022

Abstract: 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.

Abstract translation: 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。