公开(公告)号：US5756956A

公开(公告)日：1998-05-26

申请号：US531076

申请日：1995-09-20

申请人： Seiji Sato ,  Hisashi Yamada ,  Takuji Magara ,  Yoshihito Imai ,  Tatsushi Sato

发明人： Seiji Sato ,  Hisashi Yamada ,  Takuji Magara ,  Yoshihito Imai ,  Tatsushi Sato

IPC分类号： B23H1/02 ,  B23H7/02 ,  B23H7/04

CPC分类号： B23H7/04

摘要： A wire-cut electric discharge machining apparatus and a control method for the wire-cut EDM apparatus. The amount of current pulses supplied to a machining gap can be measured precisely without a detection delay to thereby detect the occurrence of faulty machining such as wire electrode breakage and centralized arcs.

摘要翻译： 一种线切割放电加工装置以及用于线切割EDM装置的控制方法。 提供给加工间隙的电流脉冲量可以精确测量而没有检测延迟，从而检测线电极断裂和集中电弧等故障加工的发生。

公开(公告)号：US5422455A

公开(公告)日：1995-06-06

申请号：US13049

申请日：1993-02-04

申请人： Seiji Sato ,  Takuji Magara ,  Hisashi Yamada

发明人： Seiji Sato ,  Takuji Magara ,  Hisashi Yamada

IPC分类号： B23H1/00 ,  B23H1/02 ,  B23H7/04

CPC分类号： B23H7/04 ,  B23H1/022

摘要： An electric discharge machining apparatus of the travelling wire or sink type includes at least one secondary electrode which is immersed in the dielectric at least during machining. A microvoltage power supply is used to create a micropotential difference between the workpiece and the secondary electrode so that the workpiece becomes a negative pole. Maintaining this arrangement both during machining and non-machining times prevents the workpiece from being subjected to positive-pole oxidation.

摘要翻译： 行走线或水槽式放电加工装置至少包括至少一个辅助电极，其至少在加工过程中浸入电介质中。 使用微电压电源来产生工件和次级电极之间的微小差异，使得工件变为负极。 在加工和非加工时间期间保持这种布置可以防止工件受到正极氧化。

公开(公告)号：US07078645B2

公开(公告)日：2006-07-18

申请号：US10499946

申请日：2002-03-28

申请人： Hisashi Yamada ,  Ryogo Koba ,  Takuji Magara ,  Masao Akiyoshi

发明人： Hisashi Yamada ,  Ryogo Koba ,  Takuji Magara ,  Masao Akiyoshi

IPC分类号： B23H7/10

CPC分类号： B23H7/101

摘要： A machining-fluid ejection device for a wire electric discharge machining apparatus includes a nozzle for ejecting machining-fluid into an inter-electrode gap between a workpiece (W) and a wire electrode (E), a casing (16) fixed to a machining head (15) disposed above or below the workpiece (W), a coupling member (18) for coupling the casing (16) and a nozzle (17), having a predetermined elastic coefficient, and deforming according to the machining-fluid pressure; an assemblage of the coupling member (18) and the nozzle (17) has hollow portions, formed with an inlet side internal diameter (D2) and an outlet side internal diameter (D1) on a machining-fluid inlet side and outlet side respectively, whose sectional areas do not change, and a hollow portion, formed with a minimum internal diameter (D0) between the machining-fluid inlet side and the outlet side, whose sectional area does not change. Machining productivity may be raised for nozzle contact machining and nozzle separation machining.

摘要翻译： 一种用于线材放电加工设备的机加工液喷射装置，包括：用于将加工流体喷射到工件（W）和线电极（E）之间的电极间间隙中的喷嘴;固定到加工 设置在工件（W）的上方或下方的头部（15），用于联接壳体（16）的联接构件（18）和具有预定弹性系数的喷嘴（17），并根据加工液压力变形; 联接构件（18）和喷嘴（17）的组合具有在机械流体入口侧和出口侧形成有入口侧内径（D 2）和出口侧内径（D 1）的中空部 分别具有截面积不变的中空部分和在切削面积不变的加工流体入口侧和出口侧之间形成有最小内径（D 0）的中空部。 可以提高喷嘴接触加工和喷嘴分离加工的加工生产率。

公开(公告)号：US06747236B1

公开(公告)日：2004-06-08

申请号：US10220762

申请日：2002-09-05

申请人： Takuji Magara ,  Hisashi Yamada

发明人： Takuji Magara ,  Hisashi Yamada

IPC分类号： B23H710

CPC分类号： B23H7/10 ,  B23H7/105 ,  B65H57/20 ,  B65H2701/354

摘要： A wire electrical discharge machine includes a wire bobbin 3 with a wire electrode 1 wound therearound; a fixing base 25 for fixing the wire bobbin 3 so that the wire bobbin 3 does not rotate; a guide pulley 23 for supporting the wire electrode 1; a rotating arm 21 for supporting the guide pulley 23 and for pulling out the wire electrode 1 from the wire bobbin 3 and rotating the wire electrode 1 about the wire bobbin 3; a sliding mechanism 24 for supporting the guide pulley 23 slidably with respect to the rotating arm 21, in correspondence with a winding position of the wire electrode 1 on the wire bobbin 3; and a braking motor 13 for driving the rotating arm 21. It is possible to disperse the wear of the wire electrode 1 and improve the machining rate and machining accuracy. Further, it is possible to improve the reliability and suppress an increase in cost.

摘要翻译： 线放电机包括绕线绕线机3的线绕线筒3; 用于固定线架3以使线架3不旋转的固定座25; 用于支撑线电极1的导向滑轮23; 旋转臂21，用于支撑引导滑轮23并从线架3拉出线电极1，并使线电极1围绕线架3旋转; 对应于电线绕线筒3上的线电极1的卷绕位置的滑动机构24，用于相对于旋转臂21可滑动地支撑导向滑轮23; 以及用于驱动旋转臂21的制动马达13.可以分散线电极1的磨损，并提高加工速度和加工精度。 此外，可以提高可靠性并抑制成本的增加。

公开(公告)号：US5416290A

公开(公告)日：1995-05-16

申请号：US985953

申请日：1992-12-04

申请人： Takuji Magara ,  Hisashi Yamada

发明人： Takuji Magara ,  Hisashi Yamada

IPC分类号： B23H1/02 ,  B23H7/04 ,  B23H7/16

CPC分类号： B23H1/022 ,  B23H7/04 ,  B23H7/16

摘要： An electrical discharge machine equipped with a machining gap voltage application circuit having switching circuits capable of switching between a first voltage application state wherein one terminal of a first direct-current power supply is connected to an electrode and the other terminal thereof is connected to a workpiece and a first voltage is applied to the gap, a second voltage application state wherein the one terminal is connected to the workpiece and the other terminal is connected to the electrode and a second voltage is applied to the gap, and a second voltage application reset state where the second voltage is not applied to the gap. The switching circuits are operative during a first period of time when the second voltage application state and a second voltage application reset state alternate with each other, and a second period of time when the first voltage application state exists, the first and second periods are repeated in a predetermined sequence.

摘要翻译： 一种配备有加工间隙电压施加电路的放电机，其具有能够在第一电压施加状态与第一直流电源的一端连接的第一电压施加状态与其另一端连接的切换电路连接到工件 并且第一电压施加到间隙，第二电压施加状态，其中一个端子连接到工件，另一个端子连接到电极，并且第二电压被施加到间隙，并且第二电压施加复位状态 其中第二电压不施加到间隙。 开关电路在第二电压施加状态和第二电压施加复位状态彼此交替的第一时间段期间操作，以及当第一电压施加状态存在时的第二时间段，第一和第二周期被重复 以预定的顺序。

公开(公告)号：US5233148A

公开(公告)日：1993-08-03

申请号：US801962

申请日：1991-11-27

申请人： Takuji Magara ,  Hisashi Yamada ,  Yasushi Endou

发明人： Takuji Magara ,  Hisashi Yamada ,  Yasushi Endou

IPC分类号： B23H1/02

CPC分类号： B23H1/022 ,  B23H2300/20

摘要： In an electrical discharge machining apparatus, the average machining gap voltage is controlled to be a predetermined value even if a discharging operation is interrupted. This is accomplished by providing a bypass circuit or an inverse voltage providing circuit that responds to an interruption in the discharging operation. By controlling the average machining gap voltage, electrolytic corrosion and magnetization of the workpiece is minimized.

公开(公告)号：US20050072759A1

公开(公告)日：2005-04-07

申请号：US10499946

申请日：2002-03-28

申请人： Hisashi Yamada ,  Ryogo Koba ,  Takuji Magara ,  Masao Akiyoshi

发明人： Hisashi Yamada ,  Ryogo Koba ,  Takuji Magara ,  Masao Akiyoshi

IPC分类号： B23H7/02 ,  B23H7/10

CPC分类号： B23H7/101

摘要： A machining-fluid ejection device for a wire electric discharge machining apparatus includes a nozzle for ejecting machining-fluid into an inter-electrode gap between a workpiece (W) and a wire electrode (E), a casing (16) fixed to a machining head (15) disposed above or below the workpiece (W), a coupling member (18) for coupling the casing (16) and a nozzle (17), having a predetermined elastic coefficient, and deforming according to the machining-fluid pressure; wherein an assemblage of the coupling member (18) and the nozzle (17) has hollow portions, formed with an inlet side internal diameter (D2) and an outlet side internal diameter (D1) on a machining-fluid inlet side and outlet side respectively, whose sectional areas do not change, and a hollow portion, formed with a minimum internal diameter (D0) between the machining-fluid inlet side and the outlet side, whose sectional area does not change. Machining productivity may-be raised for nozzle contact machining and nozzle separation machining.

摘要翻译： 一种用于线材放电加工设备的机加工液喷射装置，包括：用于将加工流体喷射到工件（W）和线电极（E）之间的电极间间隙中的喷嘴;固定到加工 位于工件（W）上方或下方的头部（15），用于联接壳体（16）的联接构件（18）和具有预定弹性系数的喷嘴（17），并根据加工液压力变形; 其中所述联接构件（18）和所述喷嘴（17）的组合具有中空部分，其分别在机械流体入口侧和出口侧形成有入口侧内径（D2）和出口侧内径（D1） ，其截面积不变化的中空部分，在切削面积不变的加工液入口侧和出口侧之间形成有最小内径（D0）的中空部。 喷嘴接触加工和喷嘴分离加工可能会增加加工生产率。

公开(公告)号：US06787727B2

公开(公告)日：2004-09-07

申请号：US10203270

申请日：2002-08-08

申请人： Hisashi Yamada ,  Takuji Magara ,  Yutaka Terada

发明人： Hisashi Yamada ,  Takuji Magara ,  Yutaka Terada

IPC分类号： B23H710

CPC分类号： B23H7/102

摘要： An automatic wire feeder of a wire electric discharge machine includes an optical sensor for detecting positional information of a wire electrode in an inserting passage between a feed roller for feeding a wire electrode and an upper wire guide; and a control unit for discriminating a state of vibration or deflection of the wire electrode according to the positional information detected by the optical sensor and also for controlling a feeding and rewinding motion of the feed roller according to a quantity of deflection of the wire electrode. Due to the foregoing, buckling caused by an inserting load in the process of automatic wire connection can be positively detected, and the reliability can be enhanced and further the repetition of connecting the wire again can be reduced.

摘要翻译： 线放电机的自动送丝机包括：光传感器，用于检测用于馈送线电极的馈送辊和上导线器之间的插入通道中的线电极的位置信息; 以及控制单元，用于根据由光学传感器检测到的位置信息来鉴别线电极的振动或偏转状态，并且还用于根据线电极的偏转量来控制进给辊的进给和重绕运动。 由于上述原因，可以可靠地检测出自动连线过程中的插入负荷引起的翘曲，可靠性得到提高，并且可以进一步减少连线的重复。

公开(公告)号：US5315088A

公开(公告)日：1994-05-24

申请号：US983714

申请日：1992-12-01

申请人： Hisashi Yamada ,  Takuji Magara

发明人： Hisashi Yamada ,  Takuji Magara

IPC分类号： B23H7/00 ,  B23H1/02 ,  B23H7/04 ,  B23H7/10 ,  B23H7/14 ,  B23H7/26 ,  B23H11/00

CPC分类号： B23H7/04 ,  B23H1/02 ,  B23H11/006

摘要： In an electric discharge machining apparatus, a workpiece electrically connected to a body of the machine and a jig on which the workpiece rests are electrically isolated from each other. The body and the workpiece are selectively switched in open-circuit/short-circuit by a switch. Switching can be made on the stool or the workpiece. Further, the switch and the workpiece and the jig are connected to each other by a coaxial cable.

摘要翻译： 在放电加工装置中，电连接到机体的工件和工件所在的夹具彼此电隔离。 主体和工件通过开关选择性地切换开路/短路。 可以在凳子或工件上进行切换。 此外，开关和工件和夹具通过同轴电缆彼此连接。

公开(公告)号：US5903067A

公开(公告)日：1999-05-11

申请号：US993628

申请日：1997-12-18

申请人： Seiji Sato ,  Hisashi Yamada

发明人： Seiji Sato ,  Hisashi Yamada

IPC分类号： B23H1/02 ,  B23H7/04

CPC分类号： B23H1/022 ,  Y10T307/747 ,  Y10T307/76

摘要： A power supply apparatus for an electric discharge machine comprises a first power supply device comprising a high impedance circuit connected in series to a DC power supply unit and a second power supply device comprising a low impedance circuit, intermittently applies a pulse voltage to a space between a tool electrode and a workpiece opposite to the tool electrode with a specified gap therebetween from the first power supply device, and also supplies a machining current to the space from the second power supply device after generation of electric discharge, in which the second power supply device provides therein a plurality units of switching devices connected in parallel to each other, the number of ON-units switching circuit for controlling the number of switching devices to be simultaneously turned ON, and an ON-time control unit for variably controlling ON-time of the switching devices.

摘要翻译： 一种用于放电机的电源装置包括：第一电源装置，包括与DC电源单元串联连接的高阻抗电路和包括低阻抗电路的第二电源装置，间歇地将脉冲电压施加到 工具电极和与工具电极相对的工件，其间具有从第一电源装置之间的特定间隙，并且在产生放电之后还从第二电源装置向空间提供加工电流，其中第二电源 装置在其中提供并联连接的多个开关装置单元，用于控制同时导通的开关装置的数量的导通单元切换电路的数量，以及用于可变地控制接通时间的接通时间控制单元 的开关装置。