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1. 发明授权

US4134000A Protection circuit for electrical discharge machining power supply apparatus 失效
标题翻译：放电加工电源装置保护电路
公开(公告)号：US4134000A
公开(公告)日：1979-01-09
申请号：US757977
申请日：1977-01-10
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Jeter O. Barker
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Jeter O. Barker
IPC分类号： B23H1/02 , B23P1/08
CPC分类号： B23H1/026 , B23H1/028
摘要： A protection circuit which senses and responds to an output transistor failure to provide appropriate power interruption to protect an electrical discharge machining apparatus. The circuit receives an input of either standard or reverse polarity from the gap. This signal is passed through a comparator stage where it is compared with a preset voltage level. Further inputs are provided in accordance with the polarity setting and from the multivibrator in such manner that an appropriate phase relationship is maintained depending on the preset polarity. A control signal is then generated to control a transistor switching device with an interrupt signal thus being furnished to turn-off the power supply. Also included in a different embodiment of the invention is a system whereby, in a multiple gap output module power supply, responsive to failure of an output transistor in any one of the output modules, the entire power supply is cut off.
摘要翻译：检测和响应输出晶体管的保护电路不能提供适当的电源中断来保护放电加工设备。电路从间隙接收标准或反极性的输入。该信号通过比较器级，其中与预设电压电平进行比较。根据极性设置和多谐振荡器提供进一步的输入，使得根据预设极性保持适当的相位关系。然后产生控制信号以控制具有中断信号的晶体管开关器件，从而被提供以关断电源。还包括在本发明的不同实施例中的是一种系统，其中，在多间隙输出模块电源中，响应于任何一个输出模块中的输出晶体管的故障，整个电源被切断。

2. 发明授权

US4249059A Gap condition light indicator system for electrical discharge machining apparatus 失效
标题翻译：放电加工装置的间隙条件指示灯系统
公开(公告)号：US4249059A
公开(公告)日：1981-02-03
申请号：US832215
申请日：1977-09-12
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H7/20 , B23P1/02
CPC分类号： B23H7/20
摘要： A set of indicator lights, preferably of the light emitting diode type, are used to provide readout from the gap to indicate a gap open circuit condition, a gap normal machining condition, or a gap short circuit condition, respectively. Three lights are preferably contained in a vertical array to give the operator an exact indication of what type of machining is being carried on and hence inform him as to what correction should be made by way of servo feed adjustment, change of machining current, or the like.
摘要翻译：使用一组优选为发光二极管型的指示灯来提供从间隙读出以指示间隙开路状态，间隙正常加工条件或间隙短路状态。三个灯优选地包含在垂直阵列中，以给予操作者正在承载什么类型的加工的精确指示，并且因此通知他关于应当通过伺服进给调节，加工电流的改变或者喜欢。

3. 发明授权

US4238660A Multi-lead servo feed system for electrical discharge machining apparatus 失效
标题翻译：放电加工设备多引线伺服进给系统
公开(公告)号：US4238660A
公开(公告)日：1980-12-09
申请号：US909023
申请日：1978-05-24
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H1/02 , B23H7/18 , B23P1/12
CPC分类号： B23H1/028 , B23H7/18
摘要： A servo feed control system providing arc sensing for each individual lead in a multiple lead set up. The lowest arc voltage of the several leads in the system determines the feed of the servo system through a hydraulic servo system or the like. Included are a pair of analog switches one of which is actuated responsive to gap polarity so that the system is conditioned to operate with equal facility at either gap polarity.
摘要翻译：一种伺服进给控制系统，为多引线组中的每个引线提供电弧感测。系统中的多个引线的最低电弧电压通过液压伺服系统等来确定伺服系统的进给。包括一对模拟开关，其中一个模拟开关响应于间隙极性被致动，使得系统被调节为在任一间隙极性处具有相同的设备操作。

4. 发明授权

US4078163A Programmable current control system for wire electrode electrical discharge machining apparatus 失效
标题翻译：线电极放电加工设备的可编程电流控制系统
公开(公告)号：US4078163A
公开(公告)日：1978-03-07
申请号：US583794
申请日：1975-06-04
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland
IPC分类号： B23H7/04 , B23P1/08
CPC分类号： B23H7/04
摘要： The system includes data input means for information relative to the material of the workpiece and the thickness of the workpiece. A read-only memory then provides information to a programmable counter so that off-time for the machining power pulses is appropriately provided for. In addition, there is manual preset means for setting the off-time to be provided during gap short circuit condition. An appropriate cut-off sensing circuit is operatively connected to the gap for sensing short circuit condition and initiating the pulse reduction but only for the duration of the gap short circuit condition.
摘要翻译：该系统包括用于相对于工件材料和工件厚度的信息的数据输入装置。然后，只读存储器向可编程计数器提供信息，以便恰当地提供加工功率脉冲的关闭时间。另外，还存在用于在间隙短路状态下设定关闭时间的手动预设装置。适当的截止感测电路可操作地连接到间隙，用于感测短路状态并启动脉冲减小，但仅在间隙短路状态的持续时间内。

5. 发明授权

US4320278A Servo feed system for electrical discharge machining apparatus 失效
标题翻译：放电加工装置伺服送料系统
公开(公告)号：US4320278A
公开(公告)日：1982-03-16
申请号：US23634
申请日：1979-03-26
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H1/02 , B23P1/02
CPC分类号： B23H1/028
摘要： The servo circuit is operable to monitor gap conditions on any number of working leads up to four at the same time. It further has the capability of responding to high voltage operating conditions and then reducing the gap voltage being sensed to an appropriate level. An analog stage is then employed to pick out the most valuable information being provided from the several gap leads. An amplifier of the FET type is used to provide high input impedance to the circuit. An absolute value circuit is further included which in either polarity will rectify the gap signal back to the positive level.
摘要翻译：伺服电路可操作以同时监视多达4个工作线路上的间隙条件。它还具有响应高电压工作条件的能力，然后将感测到的间隙电压降低到适当的水平。然后使用模拟阶段来挑选从多个间隙引线提供的最有价值的信息。 FET类型的放大器用于向电路提供高输入阻抗。进一步包括一个绝对值电路，其中任一极性将纠正间隙信号回到正电平。

6. 发明授权

US4296302A Adaptive control of gap voltage and power to control servo operation of an electrical discharge machining apparatus 失效
标题翻译：自动控制间隙电压和功率来控制放电加工设备的伺服操作
公开(公告)号：US4296302A
公开(公告)日：1981-10-20
申请号：US68329
申请日：1979-08-21
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H7/20 , B23P1/02
CPC分类号： B23H7/20
摘要： The system includes a standard servo feed arrangement in which responsive to gap voltage, servo feed is controlled for the electrode tool or alternately the workpiece.A further part of the system includes a gap voltage sensing lead and an analog to digital converter. At a predetermined point, a programmable computer is activated to provide an output signal through a digital to analog converter to influence the servo feed being controlled by the standard type servo feed system.The output from the programmable computer is weighted with respect to the output amplifier to provide a predetermined ratio of magnitude of control. A further embodiment of our invention is a system similar to the servo system described above, but in which the additional control over the servo feed system is exercised responsive to power level sensed in the EDM gap.
摘要翻译：该系统包括标准伺服进给装置，其响应于间隙电压，控制电极工具或交替工件的伺服进给。

7. 发明授权

US4152569A Servo feed circuit for electrical discharge machining apparatus 失效
标题翻译：放电加工装置伺服送料回路
公开(公告)号：US4152569A
公开(公告)日：1979-05-01
申请号：US796689
申请日：1977-05-13
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H7/18 , B23P1/08
CPC分类号： B23H7/18
摘要： A servo feed system for EDM in which feed of the electrode is controlled responsive to a gap voltage signal with appropriate feedback changes to control servo velocity and upfeed and downfeed gain as the gap voltage level changes. A further feature involves the imposition of a dither circuit between the gap voltage signal amplifier and the servo valve coil in such manner as to continuously apply dither in a manner independent of changes in gap voltage.
摘要翻译：一种用于EDM的伺服进给系统，其中响应于具有适当反馈变化的间隙电压信号来控制电极的进给，以在间隙电压电平变化时控制伺服速度和向上和向下进给增益。另一个特征是在间隙电压信号放大器和伺服阀线圈之间施加抖动电路，以便以与间隙电压变化无关的方式连续施加抖动。

8. 发明授权

US4471198A Cut-off protection system for electrical discharge machining apparatus 失效
标题翻译：放电加工设备切断保护系统
公开(公告)号：US4471198A
公开(公告)日：1984-09-11
申请号：US361129
申请日：1982-03-23
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H1/02 , B23P1/08
CPC分类号： B23H1/024
摘要： A programmable system for controlling machining current magnitude and reducing it in a step function as gap voltage falls indicating gap short circuit condition. A set of off-time numbers are computed and stored in an off-time counter. These numbers are recomputed each time a new on or off time is entered in the pulse generator. The original off-time is the normal cutting parameter. As the gap voltage drops, indicating problems, the off-time starts doubling or increasing in a like manner until it has reached many times its normal duration.
摘要翻译：一种可编程系统，用于控制加工电流幅值并在步进功能中减小，因为间隙电压下降，指示间隙短路状况。计算一组关闭时间数字并将其存储在非正式计时器中。每次在脉冲发生器中输入新的开启或关闭时间时，都会重新计算这些数字。原来的停产时间是正常的切割参数。随着间隙电压下降，指示问题，关闭时间以类似的方式开始倍增或增加，直到其达到正常持续时间的许多倍。

9. 发明授权

US4258243A Over current protection system for electrical discharge machining apparatus 失效
标题翻译：放电加工设备过电流保护系统
公开(公告)号：US4258243A
公开(公告)日：1981-03-24
申请号：US23633
申请日：1979-03-26
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H1/02 , B23P1/02
CPC分类号： B23H1/024
摘要： The system responds to the frequency of pulses from the pulse generator or multivibrator. As the frequency of the pulses increases, they get closer together and the average voltage changes in a somewhat linear fashion. A final integrator amplifier stage is used to find the predetermined maximum current level for different frequency settings. Responsive to this level being exceeded, machining power is interrupted and the EDM operation interrupted.
摘要翻译：系统响应来自脉冲发生器或多谐振荡器的脉冲频率。随着脉冲的频率增加，它们变得更靠近在一起，平均电压以某种线性方式变化。使用最终的积分放大器级来找出用于不同频率设置的预定最大电流电平。响应于此级别超过，加工功率中断，EDM操作中断。

10. 发明授权

US4254320A Power output module for electrical discharge machining power supply circuit 失效
标题翻译：放电加工电源电路功率输出模块
公开(公告)号：US4254320A
公开(公告)日：1981-03-03
申请号：US26048
申请日：1979-04-02
申请人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
发明人： Oliver A. Bell, Jr. , Randall C. Gilleland , Davey J. Chance
IPC分类号： B23H1/02 , B23P1/02
CPC分类号： B23H1/022 , B23H2300/20
摘要： A power supply circuit including a multivibrator and a power output module. Drive signals are provided at low power level and an FET stage is used to provide a high wattage output to operate the power output module. The power output module provides machining power pulses to the gap through a plurality of series resistors so that peak current can be regulated in the module itself.
摘要翻译：一种电源电路，包括多谐振荡器和功率输出模块。驱动信号以低功率电平提供，FET级用于提供高功率输出以操作功率输出模块。功率输出模块通过多个串联电阻向间隙提供加工功率脉冲，从而可以在模块本身中调节峰值电流。

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