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    • 1. 发明授权
    • Controller of wire electric discharge machine
    • 电线放电机控制器
    • US06278075B1
    • 2001-08-21
    • US09244861
    • 1999-02-05
    • Masao KamiguchiMasaki KuriharaKaoru Hiraga
    • Masao KamiguchiMasaki KuriharaKaoru Hiraga
    • B23H100
    • B23H7/04
    • A controller of a wire electric discharge machine monitoring a change in thickness of a workpiece and a current density in real time, promoting a machining speed by preventing occurrence of disconnection of a wire electrode even when the change in the thickness is caused in the workpiece and improving a dispersion in a machining enlargement amount. A machining distance calculating device outputs a signal at each progress of machining by a predetermined distance &Dgr;x. A main pulse number storing device counts a main pulse number for discharge machining outputted from a main pulse generator during a time period of the signal. A thickness calculating device calculates the thickness from a reference main pulse number in machining a reference thickness, the main pulse number stored to the main pulse number storing device and the reference thickness at each reception of the signal. The calculated thickness, further, a machining current, the machining speed and a machining current density are displayed. A discharge pause time control device changes a pause time period of voltage applied to the wire electrode and the workpiece in accordance with a thickness change rate and adjusts the machining current density such that no change is caused before and after the change in the thickness.
    • 线材放电机的控制器实时监控工件厚度的变化和电流密度,即使当在工件中引起厚度变化时,也能防止线电极断线的发生而提高加工速度, 改善加工扩大量的分散。 加工距离计算装置在每个加工进程处输出预定距离DELTAx的信号。 主脉冲数存储装置对信号的时间段期间从主脉冲发生器输出的放电加工的主脉冲数进行计数。 厚度计算装置根据加工参考厚度的参考主脉冲数,存储到主脉冲数存储装置的主脉冲数和每次接收信号时的参考厚度来计算厚度。 显示计算的厚度,还有加工电流,加工速度和加工电流密度。 放电暂停时间控制装置根据厚度变化率改变施加到线电极和工件的电压的暂停时间周期,并且调整加工电流密度,使得在厚度变化之前和之后不会发生变化。
    • 2. 发明授权
    • Controller for wire electric discharge machine
    • 电线放电机控制器
    • US07039490B2
    • 2006-05-02
    • US10803117
    • 2004-03-18
    • Masaki KuriharaKaoru Hiraga
    • Masaki KuriharaKaoru Hiraga
    • G06F19/00
    • B23H7/20B23H7/04
    • A controller for a wire electric discharge machine which can achieve stable machining with high surface accuracy without requiring adjustment of a gain or the like in wire-electrode feed control. A discharge gap detection unit detects a voltage between a wire electrode and a workpiece. An amount-of-machining-per-unit-distance change detection unit obtains an average machining voltage, and a voltage drop EX that is a difference between the obtained average machining voltage and a no-load voltage. A comparative determination unit obtains a ratio ES/EX between a reference voltage drop ES stored in a reference-amount-of-machining-per-unit-distance relative value storage unit and the drop voltage EX. A feed pulse arithmetic unit obtains a feed speed that makes the amount of machining per unit time constant, on the basis of the ratio ES/EX and a predetermined feed speed, and distributes feed pulses to motors to thereby move the wire electrode relatively to the workpiece. Since the amount of machining per unit time is kept constant, the surface accuracy in finishing is high and stable machining can be performed.
    • 一种用于线放电机的控制器,其可以在不需要调整线电极馈送控制中的增益等的情况下以高表面精度实现稳定的加工。 放电间隙检测单元检测线电极和工件之间的电压。 每单位距离变化检测单元的加工量获得平均加工电压和作为获得的平均加工电压与空载电压之间的差的电压降E X 。 比较确定单元获得存储在参考加工量中的参考电压降E S S之间的比率E SUB / E×X - 单位距离相对值存储单元和下降电压E 。 进给脉冲运算单元基于比率E / S / E 和预定的进给速度来获得使每单位时间内的加工量恒定的进给速度 并且将馈送脉冲分配给电动机,从而相对于工件移动线电极。 由于每单位时间的加工量保持恒定,所以精加工中的表面精度高,可以进行稳定的加工。
    • 5. 发明授权
    • Controller for wire electric discharge machine
    • 电线放电机控制器
    • US06980879B2
    • 2005-12-27
    • US10023906
    • 2001-12-21
    • Masaki KuriharaKaoru Hiraga
    • Masaki KuriharaKaoru Hiraga
    • B23H7/04B23H7/06G06F19/00
    • B23H7/36B23H7/04B23H7/065
    • A discharge pulse number generated between a wire electrode and a workpiece is counted every predetermined time. A ratio Px/Ps of this counted value Px to the reference pulse number Ps will be determined to control an amount of coolant in response to this ratio Px/Ps. Also, in response to this ratio Px/Ps, an amount of movement within predetermined time is controlled. Further, through the ratio Px/Ps and the like, quiescent time to be controlled by the detection voltage generator is controlled. Thereby, surplus supply of energy is prevented, the machining speed and machining precision is improved and any disconnection of the wire electrode is avoided.
    • 在每个预定时间对线电极和工件之间产生的放电脉冲数进行计数。 该计数值Px与基准脉冲数Ps的比率Px / Ps将被确定以响应于该比率Px / Ps来控制冷却剂的量。 此外,响应于该比率Px / Ps,控制在预定时间内的移动量。 此外,通过比率Px / Ps等,控制由检测电压发生器控制的静止时间。 由此,能够防止能量的过剩供给,提高加工速度和加工精度,避免线电极的断线。