公开(公告)号：EP0604665B1

公开(公告)日：1996-12-27

申请号：EP93916159.2

申请日：1993-07-13

申请人： FANUC LTD.

发明人： OBARA, Haruki ,  KITA, Yuki, 10-203, Fanuc Manshion Harimomi ,  ITO, Masaya, Fanuc Dai-3 Vira-karamatsu

IPC分类号： B23H7/02 ,  B23H7/04

CPC分类号： B23H7/02 ,  B23H7/04

摘要： A method for measuring accurately the temperature and distribution of the wire while executing an electrical discharge machining. After the machining voltage is turned off, the loop current (IL) flows. The resistance between electrodes (11 and 12) is obtained from this loop current (IL) and the voltage between the electrodes (11 and 12) measured by a differential amplifier (13). From this resistance, the temperature of the wire (1) is obtained. Thus, the wire temperature can be measured accurately during an actual machining.

公开(公告)号：EP0233297B1

公开(公告)日：1991-11-27

申请号：EP86904949.4

申请日：1986-08-21

申请人： FANUC LTD.

发明人： OBARA, Haruki ,  ASO, Toshiyuki ,  KINOSHITA, Hiroshi ,  ISHIBASHI, Tamotsu

IPC分类号： B23H7/02 ,  B23H7/10

CPC分类号： B23H7/102

摘要： A device for automatic connection of the wire electrode in a wire cut spark machine, which is capable of conducting automatic connection of the wire electrode smoothly and reliably. A wire processing unit (90) integrally and rotatably coupled to a rotary shaft (61) of a pneumatic pressure motor (60) has a nozzle-forming unit (120) which, when it is opened, forms a slit (S) that permits a wire electrode (W) to pass through and which, when it is closed, forms a nozzle hole (125) that can fit to an upper wire guide (12). The wire processing unit (90) is selectively located by means of a stopper (150) at either a wire inserting position or a wire retreat position. In case the wire electrode is broken, the wire processing unit is driven by a motor from the retreat position to the wire inserting position. Then, the nozzle-forming unit is closed, so that the wire electrode introduced through the slit when the wire processing unit is driven is held in the nozzle hole. Thereafter, as a working liquid is supplied from the upper wire guide to the nozzle hole, the wire electrode is fed and automatically connected, being confined by the working liquid injected onto the work (P).

公开(公告)号：EP0227843B1

公开(公告)日：1991-09-25

申请号：EP86904388.5

申请日：1986-07-18

申请人： FANUC LTD.

发明人： OBARA, Haruki ,  ASO, Toshiyuki ,  KINOSHITA, Hiroshi ,  ISHIBASHI, Tamotsu

IPC分类号： B23H7/10

CPC分类号： B23H7/10

摘要： An electric discharge machining apparatus of the wire-cutting type is equipped with a wire cutting unit between an upper wire guide member and a work table, the wire cutting unit being allowed to move in a horizontal direction to traverse a wire electrode (W) which downwardly extends with respect to the upper wire guide member from a wire passage of the upper wire guide member. The wire cutting unit comprises a base block (55), and a movable block (56) which can approach or separate away from the base block to define a slit (60) that can be opened or closed relative thereto and to define a nozzle hole (61). The slit extends in a horizontal direction in which the wire cutting unit moves to accept the wire electrode. The nozzle hole can be connected to the lower end of wire passage of the upper wire guide member, and is so formed as to inject a liquid toward the wire passage of the lower wire guide member, the liquid being supplied into the wire passage of the upper wire guide member. The wire cutting unit has a wire detector (66) for detecting an end of the wire electrode between the base block and movable block, and has wire cutting means (62) for cutting the wire electrode between the base block and the movable block.

公开(公告)号：EP0364591A1

公开(公告)日：1990-04-25

申请号：EP89901598.6

申请日：1989-01-24

申请人： FANUC LTD

发明人： OBARA, Haruki ,  IZUMIYA, Syunzo

IPC分类号： B23H1/02 ,  B23H7/26

CPC分类号： B23H7/04

摘要： This invention provides a wire cut electric discharge machining apparatus which can prevent electrolytic corrosion of a work due to a short-circuit detection voltage applied from short-circuit detection means between the work and a wire electrode and can therefore produce products free from corrosion scratches. The electric discharge machining apparatus includes a relay (20) for selectively short- circuiting a wire electrode (1) and a work (2) through a current supply element (3) or a relay (40) for selectively cutting off the electric connection between short-circuit detection means (8, 9) and the wire electrode through the current supply element, and both relays are responsive to a control output signal from a numeric controller (10). When the discharge machining is finished, the relay (20 or 40) operates in response to the control output signal supplied from a numeric controller and the wire electrode and the work are short-circuited or the short-circuit detection means and the wire electrode are cut off from each other so that the application of the short-circuit detection voltage between the work and the tool electrode is prevented.

摘要翻译： 本发明提供一种线切割放电加工装置，其能够防止工件的电蚀由于来自短路检测施加的短路检测电压的工作和线电极之间的装置，并且因此可以产生腐蚀划痕免费产品。 放电加工装置包括：用于选择性地短路的线电极（1）和工件（2）通过一个电流供应元件（3）或中继（40），用于选择性切断之间的电连接的继电器（20） 短路检测装置（8,9），并通过电流供应元件的金属丝电极，并且两个继电器响应于从一个数字控制器（10）输出的控制信号。 当放电加工结束时，继电器（20或40）响应于从一个数字控制器和线电极和工件提供的控制输出信号操作被短路或短路检测装置和线电极是 从海誓山盟切断所以做了工作和工具电极之间的短路检测电压的施加被防止。

公开(公告)号：EP0068027B1

公开(公告)日：1989-06-28

申请号：EP82900135.3

申请日：1981-12-23

申请人： FANUC LTD.

发明人： OBARA, Haruki

IPC分类号： B23H1/00

CPC分类号： G05B19/4163 ,  B23H7/065

公开(公告)号：EP0276314A1

公开(公告)日：1988-08-03

申请号：EP87904094.7

申请日：1987-06-17

申请人： FANUC LTD

发明人： OBARA, Haruki

IPC分类号： B23H1/02 ,  B23H7/04

CPC分类号： B23H7/04

摘要： A discharge machining controller in which a power source for discharge machining of a wire cut electric spark machine is controlled depending upon a leakage current that flows through a wire electrode (2) and a work (3), in order to obtain stable electric discharge and favourable surface coarseness, In the controller, a peak value of machining voltage applied across the wire electrode (2) and the work (3) is detected by a peak voltage detector circuit (D4, R8, R9, C2). As the leakage current increases and the detected value decreases, the ON time and OFF time of switching elements (Tri, Tr2) that exist between the DC power source (1) and the wire electrode and work are switched from values smaller than a time constant (R1.C1) of the charge/discharge circuit into larger values, whereby the machining voltage increases. When the leakage current decreases again, these values are switched into values smaller than the time constant. This makes it possible to maintain the effective machining voltage it a proper value.

摘要翻译： 放电加工控制器包括峰值电压检测电路，用于检测施加在线电极和工件上的加工电压的峰值，以及根据由检测电路检测的峰值来改变该电压的控制器。 在一个示例中，二极管，电阻和电容检测电路（D4，R8，R9，C2）检测线电极（2）和工件（3）之间的峰值电压。 当漏电流增加时，直流源（1）和工件之间的开关元件（Tr1，Tr2）的接通和关断时间从小于放电电路的时间常数（R1，C1）的值变化，并且检测值降低 当泄漏电流再次下降时，小于此时间常数。

公开(公告)号：EP0259497A1

公开(公告)日：1988-03-16

申请号：EP87901662.4

申请日：1987-03-03

申请人： FANUC LTD

发明人： OBARA, Haruki

IPC分类号： B23H7/10

CPC分类号： B23H7/10

摘要： A power-feeding device for a wire-cut electric spark machine, comprising a wire electrode guide (3), a first power-feeding portion (51) provided along a direction of expansion of a wire electrode (1) for wire-cut discharge processing, and a second power-feeding portion (52) which is provided along a direction of expansion of the wire electrode (1) and which is capable of moving in a direction of intersecting the wire electrode (1), wherein the wire electrode (1) is selectively connected to the first power-feeding portion (51) or to the second power-feeding portion (52). Or, a power-feeding device for a wire-cut electric spark machine, comprising a wire electrode guide (3), a third power-feeding portion (53) and a fourth power-feeding portion (54) that are provided while maintaining a small distance relative to each other with the wire electrode (1) for wire-cut discharge processing interposed therebetween, and a wire electrode direction changing means (4) for changing the direction of expansion of the wire electrode (1), wherein the wire electrode (1) is selectively connected to the third power-feeding portion (53) or to the fourth power-feeding portion (54).

摘要翻译： 放电线电极加工馈电系统。 其包括设置在所述线上的第一供电部分（51），随后是线电极（1）和可伸缩的第二供电部分（52），所述第二供电部分可移动以接触所述线电极，并且所述线电极被选择性地接触 通过第1或第2馈电部分。 第一馈电部分51用于粗切割，并且具有使用例如同轴电缆（73）的低电感电源电路（7）。 第二馈电部分52用于整理工作，并且具有使用例如低电容电缆的电源电路（6）。 线电极通常由第一馈电部分接触，但是当第二馈电部分响应于开关元件（61,71）的动作而与第二馈电部分接触时，它与该部分移动脱离接触。

公开(公告)号：EP0067876B1

公开(公告)日：1987-10-14

申请号：EP81903076.8

申请日：1981-11-18

申请人： FANUC LTD.

发明人： GAMO, Gotaro ,  KINOSHITA, Mitsuo ,  OBARA, Haruki

IPC分类号： B23H7/06

CPC分类号： B23H7/065

公开(公告)号：EP0227843A1

公开(公告)日：1987-07-08

申请号：EP86904388.5

申请日：1986-07-18

申请人： FANUC LTD

发明人： OBARA, Haruki ,  ASO, Toshiyuki ,  KINOSHITA, Hiroshi ,  ISHIBASHI, Tamotsu

IPC分类号： B23H7/10

CPC分类号： B23H7/10

摘要： An electric discharge machining apparatus of the wire-cutting type is equipped with a wire cutting unit between an upper wire guide member and a work table, the wire cutting unit being allowed to move in a horizontal direction to traverse a wire electrode (W) which downwardly extends with respect to the upper wire guide member from a wire passage of the upper wire guide member. The wire cutting unit comprises a base block (55), and a movable block (56) which can approach or separate away from the base block to define a slit (60) that can be opened or closed relative thereto and to define a nozzle hole (61). The slit extends in a horizontal direction in which the wire cutting unit moves to accept the wire electrode. The nozzle hole can be connected to the lower end of wire passage of the upper wire guide member, and is so formed as to inject a liquid toward the wire passage of the lower wire guide member, the liquid being supplied into the wire passage of the upper wire guide member. The wire cutting unit has a wire detector (66) for detecting an end of the wire electrode between the base block and movable block, and has wire cutting means (62) for cutting the wire electrode between the base block and the movable block.

公开(公告)号：EP0174372A1

公开(公告)日：1986-03-19

申请号：EP85901056.3

申请日：1985-02-14

申请人： FANUC LTD.

发明人： OBARA, Haruki

IPC分类号： B23H1/02

CPC分类号： B23H1/022 ,  B23H2300/20

摘要： A power source for electric discharge machining employing a capacitor discharge circuit with charging and discharging switching elements 01, Q2 for use in an electric discharge machining apparatus, wherein no resistance for limiting charging current is used in order to eliminate energy loss and to prevent the switching element Q1 from breaking due to surge voltage of the switching element Q1. Further, a diode D is provided in parallel with the discharging capacitor C1. The diode D, the charging switching element Q1, and a capacitor C2 for smoothing the power source are fabricated in the form of a printed circuit board in order to reduce the stray inductance and to limit surge voltage.