Electric discharge machining apparatus
    91.
    发明授权
    Electric discharge machining apparatus 有权
    放电加工机

    公开(公告)号:US6140600A

    公开(公告)日:2000-10-31

    申请号:US247564

    申请日:1999-02-10

    CPC分类号: B23H1/022

    摘要: An electric discharge machining apparatus including a first power source for applying machining voltage to a machining gap to generate an electric discharge, a second power source for applying voltage of equal to or lower than 20 V to the machining gap, a transistor switching bridge connected to both the workpiece and the tool electrode, a switch for selectively connecting one of the first and second power sources to the transistor switching bridge, a transistor controller for controlling on/off switching operation of the transistor switching bridge to alternatively change polarity of voltage being applied to the machining gap, a contact detector for electrically detecting the contact between the workpiece and the tool electrode when output of the second power source is applied across the machining gap, and an NC device which controls the switch so that the first power source is connected to the transistor switching bridge when the application of the machining power is required while the second power source is connected to the transistor switching bridge when detecting the contact by the contact detector is required.

    摘要翻译: 一种放电加工设备,包括:用于向加工间隙施加加工电压以产生放电的第一电源;对加工间隙施加等于或低于20V的电压的第二电源;连接到 工件和工具电极,用于将第一和第二电源中的一个选择性地连接到晶体管开关桥的开关,用于控制晶体管开关桥的导通/截止开关操作的晶体管控制器,以交替地改变施加的电压的极性 对于加工间隙,接触检测器,用于在跨越加工间隙施加第二电源的输出时电气地检测工件和工具电极之间的接触;以及NC装置,其控制开关以使得第一电源连接 在需要加工功率时需要使用晶体管开关桥 当需要接触检测器检测到接触时,他的第二个电源连接到晶体管开关桥。

    Radio apparatus
    92.
    发明授权
    Radio apparatus 失效
    无线电设备

    公开(公告)号:US6091941A

    公开(公告)日:2000-07-18

    申请号:US192240

    申请日:1998-11-16

    摘要: Disclosed is a radio apparatus in which modulating signals (I, Q signals) from an arithmetic/control unit are converted to analog signals, which are then applied to an orthogonal modulator. A modulated wave for transmission, which has been produced by orthogonally modulating a reference carrier wave by the modulating signals, is demodulated by the orthogonal detector. The arithmetic/control unit compares the modulating signals and the demodulated signals and, based upon the comparison, updates distortion compensation coefficients and applies pre-distortion processing to the modulating signal using the distortion compensation coefficients. Leakage carrier produced due to offset of the orthogonal modulator is detected and the arithmetic/control unit adjusts the level of the modulating signals or shifts the phase of the reference carrier wave in such a manner that the leakage carrier (offset) becomes zero.

    摘要翻译: 公开了一种无线电设备,其中将来自算术/控制单元的调制信号(I,Q信号)转换为模拟信号,然后将其应用于正交调制器。 通过正交检波器解调通过调制信号正交调制参考载波产生的用于传输的调制波。 算术/控制单元比较调制信号和解调信号,并且基于比较,更新失真补偿系数,并使用失真补偿系数对调制信号应用预失真处理。 检测由于正交调制器的偏移而产生的泄漏载波,并且算术/控制单元调节调制信号的电平或以使得泄漏载波(偏移)变为零的方式偏移参考载波的相位。

    System and method for wire cut discharge machining
    93.
    发明授权
    System and method for wire cut discharge machining 有权
    线切割放电加工的系统和方法

    公开(公告)号:US6028282A

    公开(公告)日:2000-02-22

    申请号:US180278

    申请日:1998-11-06

    IPC分类号: B23H7/10

    CPC分类号: B23H7/104

    摘要: A wire cut electric discharge machine including a device (6) for pulling a wire electrode (1) such that it travels along a wire transport path, a servo motor (4B) which applies tension to the traveling wire electrode, an NC device which generates a signal indicating a tension setting value; a tension detector (9) which detects the tension applied to the wire electrode and generates a signal indicating the detected value, and a tension control device which processes the signal indicating the tension setting value and the signal indicating the tension detection value, and commands the servo motor rotational speed. The tension control device includes a non-essential frequencies setting circuit (20) which sets non-essential frequencies and generates a signal indicating that setting value, and an electric filter device (19), which blocks non-essential frequencies based on the non-essential frequencies setting circuit output signal.

    摘要翻译: PCT No.PCT / JP98 / 00966 Sec。 371日期:1998年11月6日 102(e)1998年11月6日日期PCT提交1998年3月9日PCT公布。 第WO98 / 39128号公报 日期1998年9月11日一种线切割放电加工机,其特征在于,包括用于拉丝线电极(1)使其沿线输送路径行进的装置(6),向行进线电极施加张力的伺服电动机(4B) 生成表示张力设定值的信号的NC装置; 张力检测器(9),其检测施加到线电极的张力并产生指示检测值的信号;以及张力控制装置,其处理指示张力设定值的信号和指示张力检测值的信号,并且命令 伺服电机转速。 张力控制装置包括非基本频率设定电路(20),其设定非基本频率并产生指示设定值的信号,以及电滤波器装置(19),其基于非限制频率设定电路 基本频率设定电路输出信号。

    Electrical discharge machining apparatus and electrical discharge
machining method
    94.
    发明授权
    Electrical discharge machining apparatus and electrical discharge machining method 失效
    放电加工装置和放电加工方法

    公开(公告)号:US5986232A

    公开(公告)日:1999-11-16

    申请号:US875922

    申请日:1997-08-11

    IPC分类号: B23H1/02

    CPC分类号: B23H1/022

    摘要: An electrical discharge detector (30) which detects electrical discharge generated at a machining gap; a pulse generator (41) which generates a pulse signal which stops after the commencement of electrical discharge in response to the electrical discharge detector; first switching circuits (22A, 22D) which apply voltage pulses of one polarity in response to the pulse signal; second switching circuits (22B, 22C), which apply voltage pulses of the opposite polarity to the machining gap in response to the pulse signal; a flip-flop (46) which retains one of two states; a gate circuit (42, 43) which supplies a pulse signal to the first switching circuit when one state is retained in the flip-flop, and supplies a pulse signal to the second switching circuit when the other state is retained in the flip-flop; circuits (CK, 48, 49) which supply a high frequency pulse to the flip-flop for the duration of the pulse signal; a circuit (44) which supplies a single pulse to the flip-flop each time the pulse signal is inactive; and a machining current supply circuit (10), which supplies a machining current to the machining gap after the commencement of electrical discharge.

    摘要翻译: PCT No.PCT / JP96 / 03890 371日期1997年8月11日 102(e)日期1997年8月11日PCT 1996年12月27日PCT公布。 第WO97 / 24202号公报 日期1997年7月10日检测在加工间隙产生的放电的放电检测器(30) 脉冲发生器(41),其响应于所述放电检测器产生在放电开始之后停止的脉冲信号; 响应于脉冲信号施加一个极性的电压脉冲的第一开关电路(22A,22D); 第二开关电路(22B,22C),其响应于所述脉冲信号向所述加工间隙施加相反极性的电压脉冲; 一个保持两种状态之一的触发器(46); 门电路(42,43),当一个状态保持在触发器中时,向第一开关电路提供脉冲信号,并且当另一状态保持在触发器中时,将脉冲信号提供给第二开关电路 ; 电路(CK,48,49),其在脉冲信号的持续时间内向触发器提供高频脉冲; 每当脉冲信号无效时,向触发器提供单个脉冲的电路(44); 以及在放电开始后向加工间隙供给加工电流的加工电流供给电路(10)。

    Method and instrument for determining position wire electrode is in
contact with workpiece
    95.
    发明授权
    Method and instrument for determining position wire electrode is in contact with workpiece 失效
    确定位置线电极的方法和仪器与工件接触

    公开(公告)号:US5852269A

    公开(公告)日:1998-12-22

    申请号:US809414

    申请日:1997-07-28

    CPC分类号: B23H7/065 B23H2500/20

    摘要: A contact position measurement method including moving either a wire-shaped tool electrode or a workpiece relative to the other within a plane, and causing the wire to approach a reference position on the workpiece; applying a voltage between the wire and the workpiece with the wire oriented perpendicular to the plane; detecting contact between the workpiece reference position and the wire; placing the workpiece reference position generally at the center of vibration of the wire, determined in accordance with the number of occurrences of detected contact; generating coordinate data indicating the position of the wire with respect to the workpiece; and determining the position of contact based on the coordinate data.

    摘要翻译: PCT No.PCT / JP96 / 03309 Sec。 371日期1997年7月28日第 102(e)日期1997年7月28日PCT 1996年11月11日PCT PCT。 公开号WO97 / 18052 日期1997年5月22日一种接触位置测量方法,包括在平面内移动线形工具电极或工件相对于另一个,并使线接近工件上的基准位置; 电线与工件之间施加电压,导线垂直于平面; 检测工件基准位置与导线之间的接触; 将工件基准位置一般放置在线的振动中心,根据检测到的触点的发生次数确定; 产生指示线相对于工件的位置的坐标数据; 以及基于坐标数据确定联系人的位置。

    Power supply system for electric discharge machines
    96.
    发明授权
    Power supply system for electric discharge machines 失效
    放电机供电系统

    公开(公告)号:US5298709A

    公开(公告)日:1994-03-29

    申请号:US818536

    申请日:1992-01-09

    IPC分类号: B23H1/02 B23H7/14

    摘要: A power supply for an electroerosion machine having a switching element which controls the machining current in the gap. The value of the current is compared with a predetermined voltage and the signal generated based on this comparation is provided to a logic gate, advantageously an "AND" gate, whose output signal is applied to the control electrode of the switching element. The power supply surpresses any arcing tendency during gap short circuit conditions and increases the total current through the gap even when gap voltage is low in order to maintain a high machining rate. Electrode consumption is reduced by using a generally step-type current waveform signal. Machining current during the discharge period may be controlled to more closely approximate a square wave so that shifting to a faster machining rate can be easily accomplished by accepting some sacrifice in electrode consuption. Preferably, two or more switching and gating devices are used to permit gap current to flow intermittently during the entire discharge period.

    摘要翻译: 一种用于电腐蚀机的电源,其具有控制间隙中的加工电流的开关元件。 将电流值与预定电压进行比较,并将基于该比较生成的信号提供给逻辑门,有利地是“AND”门,其输出信号被施加到开关元件的控制电极。 电源在间隙短路条件下保持任何电弧倾向,即使间隙电压较低,也可增加间隙中的总电流,以保持较高的加工速度。 通过使用大致阶梯式电流波形信号来降低电极消耗。 放电期间的加工电流可以被控制为更接近于方波,从而通过接受电极消耗中的一些牺牲,可以容易地实现转换到更快的加工速度。 优选地,使用两个或更多个开关和门控装置来允许间隙电流在整个放电期间间歇地流动。