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公开(公告)号：US4864092A
公开(公告)日：1989-09-05
申请号：US211123
申请日：1988-06-21
申请人： Haruki Obara
发明人： Haruki Obara
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H2300/20
摘要： An electric discharge machining power source is provided which charges a capacitor connected in parallel with an electrode and a work, and applies a charge voltage between the electrode and the work to cause electric discharge, thereby performing electric discharge machining. The machining power source allows rapid charging of the capacitor and is inexpensive while the power source efficiency is improved. A switching element is arranged in the charge circuit of the capacitor which is capable of being turned on and off. The switching element connects the capacitor to a direct current power source and charges the capacitor. A flywheel circuit including an inductance and a diode is provided in the charge circuit. A reverse voltage that is caused by a stray inductance in the electric discharge circuit during electric discharge is applied to the capacitor as a positive voltage through the flywheel circuit.
摘要翻译： 提供一种放电加工电源，其对与电极和工件并联连接的电容器进行充电，并且在电极和工件之间施加充电电压以进行放电，从而进行放电加工。 加工电源允许电容器的快速充电并且便宜，同时电源效率提高。 开关元件布置在电容器的充电电路中，其能够导通和断开。 开关元件将电容器连接到直流电源并对电容器充电。 在充电电路中提供包括电感和二极管的飞轮电路。 在放电期间由放电电路中的杂散电感引起的反向电压通过飞轮电路作为正电压施加到电容器。
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公开(公告)号：US4801779A
公开(公告)日：1989-01-31
申请号：US30849
申请日：1987-03-12
申请人： Haruki Obara
发明人： Haruki Obara
CPC分类号： B23H7/065
摘要： A wire electrode type electrical discharge machining apparatus is provided with a taper-machining controller which is capable of conducting taper-machining with high accuracy, even in the case where the rigidity of the electrode varies due to the variation of the temperature thereof following the variation of the electric current flowing therein. The information representing the relations between a machining current and a taper-angle in the entire controllable range of a taper-angle to be controlled is prepared in advance and stored in a memory. A means for setting a machining current, a means for program-inputting a machining current, or a means for sensing a machining current is provided. The above information is read by a correction means, in response to the machining current which was set, program-input, or sensed by one of the above presented means, before it is input to the taper-machining controller, which corrects the taper-angle. In one embodiment, the taper machining controller computes the correct taper angle. With this corrected taper angle, tapper-machining can be conducted with high accuracy.
摘要翻译： PCT No.PCT / JP86 / 00289 Sec。 371日期1987年3月12日 102（e）1987年3月12日PCT PCT 1986年6月11日PCT公布。 公开号WO86 / 07294 日期：1986年12月18日。线电极放电加工装置具有能够以高精度进行锥形加工的锥形加工控制器，即使在电极的刚度由于变化而变化的情况下 的温度随其中流动的电流的变化而变化。 预先准备表示要控制的锥角的整个可控范围内的加工电流与锥角之间的关系的信息，并将其存储在存储器中。 提供了用于设定加工电流的装置，用于编程输入加工电流的装置或用于感测加工电流的装置。 上述信息由校正装置读取，响应于在输入到锥形加工控制器之前由上述提出的装置之一设定，程序输入或感测的加工电流， 角度。 在一个实施例中，锥形加工控制器计算正确的锥角。 通过这种校正的锥角，可以高精度地进行分条加工。
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公开(公告)号：US4783583A
公开(公告)日：1988-11-08
申请号：US31071
申请日：1987-03-18
CPC分类号： B23H7/10
摘要： The electric discharge machining apparatus of the wire-cutting type comprises a wire-treating unit (48) movable in the horizonal direction relative to an upper wire guide member (12) between the upper wire guide member and a work table (10) to traverse a wire electrode (W) extending downward from a wire passage (13) of the upper wire guide member. The wire-treating unit has a base block (55) and a movable block (56) that can approach to and separate from the base block to define a slit (60) and a nozzle hole (61) that can be opened and closed between the two blocks. The slit extends in the horizontal moving direction of the wire-treating unit to receive the wire electrode therein. The nozzle hole can be connected to the lower end of the wire passage of the upper wire guide member, and the nozzle hole is constructed so that a spray liquid supplied into the wire passage of the upper wire guide member can be injected into a wire passage (15) of a lower wire guide member (14). The wire-treating unit comprises a wire-detecting device (66) for detecting the end of the wire electrode between the base block and the movable block and wire-cutting means (62) for cutting the wire electrode between the base block and the movable block.
摘要翻译： PCT No.PCT / JP86 / 00372 Sec。 371日期1987年5月19日 102（e）日期1987年5月19日PCT提交1986年7月18日PCT公布。 第WO87 / 00467号公报 日期：1987年1月29日。线切割型放电加工装置包括：线处理单元（48），其能够相对于上线引导构件（12）在水平方向上相对于上线引导构件和 工作台（10）穿过从上导线构件的线路（13）向下延伸的线电极（W）。 线处理单元具有底座（55）和可移动块（56），可移动块（56）能够接近并与基座分离，以限定狭缝（60）和喷嘴孔（61），该孔可以在 两个街区。 狭缝在线处理单元的水平移动方向上延伸以在其中容纳线电极。 喷嘴孔可以连接到上线引导构件的线通道的下端，并且喷嘴孔被构造成使得供应到上线引导构件的线通道中的喷射液体可以被注入到线路通道 （14）的下部导线构件（15）。 线处理单元包括用于检测基块和可移动块之间的线电极的端部的线检测装置（66）和用于在基块和可移动块之间切割线电极的线切割装置（62） 块。
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公开(公告)号：US4678884A
公开(公告)日：1987-07-07
申请号：US807509
申请日：1985-11-22
申请人： Haruki Obara , Masaya Ito , Masashi Tonamura
发明人： Haruki Obara , Masaya Ito , Masashi Tonamura
CPC分类号： B23H7/04
摘要： A wire discharge machining power source controls an average machining voltage value applied between a wire electrode (P) and a workpiece (W) to be zero to prevent galvanic corrosion of the workpiece (W). A reverse voltage application time control circuit (2) detects the average machining voltage value and generates a pulse (S5) having a pulse width corresponding to a detected value. A reverse voltage regulating circuit (1) detects a difference between a reference voltage and a voltage applied between a transistor (T2) and a resistor (R2) upon application of the reverse voltage through the transistor (T2) and the resistor (R2), and supplies a difference signal, which corresponds to the detected difference, as an ON control signal to the transistor (T2) for a period corresponding to the width of the pulse (S5), thereby controlling the reverse voltage value and setting the average machining voltage value to zero.
摘要翻译： 线放电加工电源将施加在线电极（P）和工件（W）之间的平均加工电压值控制为零，以发挥工件（W）的电偶腐蚀。 反向电压施加时间控制电路（2）检测平均加工电压值，并生成具有对应于检测值的脉冲宽度的脉冲（S5）。 反向电压调节电路（1）通过晶体管（T2）和电阻器（R2）施加反向电压时，检测参考电压和施加在晶体管（T2）和电阻器（R2）之间的电压之间的差值， 并且将对应于检测到的差异的差分信号作为ON控制信号提供给晶体管（T2）一段与脉冲宽度相对应的周期（S5），由此控制反向电压值并设定平均加工电压 值为零。
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5.发明授权
公开(公告)号：US4518842A
公开(公告)日：1985-05-21
申请号：US452141
申请日：1982-12-22
申请人： Haruki Obara
发明人： Haruki Obara
摘要： When cutting an arc or a corner in a workpiece on a wire-cut electric discharge machine, discharge power as required on rectilinear cutting is corrected on the basis of the amount of flexing of a wire electrode during rectilinear cutting and an amount of flexing of the wire electrode permitted in view of a tolerance in arc or corner cutting. The tension of the wire electrode is also adjusted and the speed of relative movement between the wire electrode and the workpiece is controlled. Dependent on whether a convex surface or a concave surface is cut in the workpiece, the rate at which the tension of the wire electrode and the speed of relative movement are proportional to each other is changed.
摘要翻译： 在线切割放电机上切割工件中的电弧或角落时，直线切割时所需的放电功率根据直线切割时线电极的弯曲量进行校正， 鉴于电弧或角切割中的公差，允许线电极。 也调整线电极的张力，并控制线电极与工件之间的相对移动速度。 取决于工件中凸面或凹面是否被切割，线电极的张力和相对移动速度彼此成比例的速率发生变化。
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公开(公告)号：US4469927A
公开(公告)日：1984-09-04
申请号：US456060
申请日：1983-01-05
申请人： Haruki Obara , Shunzo Izumiya
发明人： Haruki Obara , Shunzo Izumiya
CPC分类号： B23H7/04
摘要： The present invention is directed to an arrangement for wire-cut, electric discharge machining in which the charged voltage of a capacitor is applied across a wire electrode and a workpiece and the terminal voltage of the capacitor is controlled to perform electric discharge machining of the workpiece at an increased cutting speed.A capacitor (15) for applying a voltage across a workpiece (16) and a wire electrode (17) for electric discharge machining is charged from a DC power source (11) via a transistor (13) serving as a switching element; a transistor (24) serving as an auxiliary switching element is connected in parallel to the transistor (13); and the terminal voltage of the capacitor (15) is detected to control the transistor (24), by which the terminal voltage of the capacitor (15) is maintained at an intermediate level (H1), lowering the mean working voltage.
摘要翻译： PCT No.PCT / JP82 / 00163 Sec。 371日期1983年1月5日 102（e）日期1983年1月5日PCT提交日期为1982年5月12日PCT公布。 出版物WO82 / 04001 日期：1982年11月25日。本发明涉及一种线切割放电加工装置，其中电容器的充电电压跨过线电极和工件施加，电容器的端子电压被控制为 以提高的切割速度对工件进行放电加工。 通过用作开关元件的晶体管（13）从直流电源（11）充电用于在工件（16）和用于放电加工的线电极（17）之间施加电压的电容器（15） 用作辅助开关元件的晶体管（24）并联连接到晶体管（13）; 检测电容器（15）的端子电压，以控制电容器（15）的端子电压维持在中间电平（H1）的晶体管（24），降低平均工作电压。
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公开(公告)号：US4387285A
公开(公告)日：1983-06-07
申请号：US217804
申请日：1980-12-18
申请人： Haruki Obara
发明人： Haruki Obara
CPC分类号： B23H1/022 , B23H7/04 , B23H2300/20
摘要： A power source for wire-cut electric discharge machines which is designed to increase the cutting speed and improve the surface roughness of a workpiece. A capacitor for supplying a discharge energy across a wire electrode and the workpiece is always by a DC power supply and the charged voltage across the capacitor is applied across the machining gap via a switching element. The switching element is turned ON when the voltage across the capacitor reaches a predetermined level, and turned OFF when the voltage becomes substantially zero, permitting rapid charging of the capacitor and the generation of a uniform discharge energy.
摘要翻译： 用于切线放电机的电源，其设计用于增加切割速度并提高工件的表面粗糙度。 用于通过线电极和工件提供放电能量的电容器总是通过直流电源，并且电容器两端的充电电压经由开关元件施加在加工间隙上。 当电容器两端的电压达到预定电平时，开关元件导通，当电压变为基本为零时，开关元件导通，允许电容器的快速充电和产生均匀的放电能量。
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公开(公告)号：US5006693A
公开(公告)日：1991-04-09
申请号：US381635
申请日：1989-07-03
申请人： Haruki Obara , Syunzo Izumiya
发明人： Haruki Obara , Syunzo Izumiya
CPC分类号： B23H7/04
摘要： A gap voltage detector in a wire-cut electric discharge machine is provided, which is capable of eliminating an adverse effect due to a variation in an electric discharge position, thereby detecting a gap voltage between a wire electrode and a workpiece in an accurate manner. An operational amplifier (11) of the gap voltage detector is supplied at one input terminal with the sum of a voltage between an upper conductor (4) and the workpiece detected by a voltage divider (R11, R12) and a voltage between a lower conductor (5) and the workpiece detected by another voltage divider (R21, R22), and is supplied at another input terminal through variable resistors (RV1, RV2) with an output from a detection coil (10) corresponding to a differentiation of the electric discharge current and an output from an integration circuit (12) corresponding to the electric discharge current, as a signal for correcting the voltage drop components attributable to the wire resistance and inductance between the conductors, to thereby generate the corrected sum by using the voltage drop components as a gap voltage.
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公开(公告)号：US4967054A
公开(公告)日：1990-10-30
申请号：US381393
申请日：1989-07-03
申请人： Haruki Obara , Syunzo Izumiya
发明人： Haruki Obara , Syunzo Izumiya
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H2300/20
摘要： An electric-discharge-machining power source in an electric discharge machine, which is capable of generating machining pulses each having a large peak value and a small pulse width, thereby attaining an improved machining speed. In the electric-discharge-machining power source, when supply of a power source voltage in between a workpiece (W) and a tool electrode (P) is prohibited by transistors (T1, T2), a generated return current attributable to energy accumulated in stray inductances (L1, L2) is returned to a high-voltage smoothing capacitor (C2) through return diodes (D1, D2). This allows the capacitor to be charged up to a voltage exceeding the power source voltage. As a result, the return current falls rapidly. In response to an output from a comparator (1) generated when a divided voltage (VH) corresponding to the capacitor charge voltage exceeds a reference voltage (VL), a transistor (T3) is rendered to be conductive. This allows the electric charge accumulated in the capacitor to be returned to a power-source-voltage smoothing capacitor (C1) through the transistor and an impedance (Z).
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公开(公告)号：US4833289A
公开(公告)日：1989-05-23
申请号：US148651
申请日：1988-01-15
申请人： Haruki Obara
发明人： Haruki Obara
CPC分类号： B23H7/04
摘要： An electric discharge machining control apparatus which controls an electric discharge machining power source of a wire electric discharge machine in accordance with a leakage current flowing between a wire electrode (2) and a workpiece (3). This permits stable electric discharge and satisfactory surface roughening. The control apparatus described above, the peak value of a machining voltage applied between the wire electrode (2) and the workpiece (3) is detected by means of a peak voltage detecting circuit (D4, R8, R9, C2). When the leakage current increases so that a detection value is reduced, the on and off times of switching elements (Tr1, Tr2), interposed between a DC power source (1) and the wire electrode and between the DC power source and the workpiece, are changed from a value smaller than the time constant (R1.C1) of a charge and discharge circuit to a value larger than the time constant. Thus, the machining voltage increases. When the leakage current is reduced again the on and off times are changed to the value smaller than the time constant. Thus, the effective machining voltage is kept at a proper value.
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