专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US4303957A Gap condition sensing circuit for electrical discharge machining power supply 失效
标题翻译：放电加工电源间隙条件检测电路
公开(公告)号：US4303957A
公开(公告)日：1981-12-01
申请号：US52403
申请日：1979-06-27
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 , H02H3/20 , B23K9/16
CPC分类号： B23H1/024
摘要： A protection system circuit which senses and responds to abnormal gap voltage condition. The circuit is operable in either positive or negative polarity of the gap. The circuit includes two branches, one relating to positive gap polarity and the other to negative polarity. The appropriate one of the two branches is selected by enabling one of two comparators in the respective branches.
摘要翻译：一种检测和响应异常间隙电压条件的保护系统电路。电路可以在间隙的正或负极性中工作。该电路包括两个分支，一个与正间隙极性相关，另一个分为负极性。通过启用相应分支中的两个比较器中的一个来选择两个分支中的适当一个。

22. 发明授权

US4292490A Electrical discharge machining power supply with digitally controlled on and off time and protective system 失效
标题翻译：放电加工电源具有数字控制的开关时间和保护系统
公开(公告)号：US4292490A
公开(公告)日：1981-09-29
申请号：US036570
申请日：1979-05-07
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
摘要： A digitally controlled and free-running multivibrator for the power supply is used to supply machining power pulses of predetermined ON and OFF time duration. The pulse output from the digital multivibrator is passed through at least one intermediate drive stage to trigger an electronic output switch, which is operatively connected both to a main DC power source and the gap, to actually provide the machining power pulses thereto. Responsive to a predetermined drop in gap voltage, a digitally predetermined extended OFF time is added.
摘要翻译：用于电源的数字控制和自由运行的多谐振荡器用于提供预定ON和OFF持续时间的加工功率脉冲。来自数字多谐振荡器的脉冲输出通过至少一个中间驱动级以触发可操作地连接到主DC电源和间隙的电子输出开关，以实际提供加工功率脉冲。响应于间隙电压的预定下降，增加数字预定的延长关断时间。

23. 发明授权

US4267423A Protection circuit for electrical discharge machining power supply 失效
标题翻译：放电加工电源保护电路
公开(公告)号：US4267423A
公开(公告)日：1981-05-12
申请号：US41766
申请日：1979-05-24
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 , B23P1/02
CPC分类号： B23H1/024
摘要： Gap current is sensed and a voltage signal representative of gap current is integrated to provide a relatively stable DC voltage that is proportional to average current at the gap. A reference setting is made to which the average gap current is compared and, responsive to rise in current above that level, cutoff of the power supply will be initiated.
摘要翻译：感测间隙电流并且表示间隙电流的电压信号被积分，以提供与间隙处的平均电流成比例的相对稳定的直流电压。进行比较平均间隙电流的参考设置，并且响应于高于该电平的电流上升，电源的截止将被启动。

24. 发明授权

US4786778A Electrical discharge machining fine finish circuit with symmetrical waveform in both polarities 失效
标题翻译：放电加工精加工精细电路具有对称波形的极性
公开(公告)号：US4786778A
公开(公告)日：1988-11-22
申请号：US901958
申请日：1986-08-29
申请人： Kuang-Ta Ho , Randall C. Gilleland
发明人： Kuang-Ta Ho , Randall C. Gilleland
IPC分类号： B23H1/02
CPC分类号： B23H1/022
摘要： An EDM machining circuit which is operable at negative polarity and at positive polarity. A push pull circuit is included to provide a symmetrical waveform with either polarity. Switching control of the main switching transistor is provided through a microprocessor.
摘要翻译：一种可在负极性和正极性操作的电火花加工加工电路。包括推挽电路以提供具有任何极性的对称波形。通过微处理器提供主开关晶体管的开关控制。

25. 发明授权

US4084074A Wire electrode protection system for electrical discharge machining 失效
标题翻译：线电极保护系统放电加工
公开(公告)号：US4084074A
公开(公告)日：1978-04-11
申请号：US534291
申请日：1974-12-19
申请人： Randall C. Gilleland , Frank P. Rietveld
发明人： Randall C. Gilleland , Frank P. Rietveld
IPC分类号： B23H7/10 , B23P1/08
CPC分类号： B23H7/10
摘要： A wire feed protection system for an electrical discharge machining apparatus and machine tool. The workpiece is supported for movement along two coordinate axes in the "X" and "Y" direction through electrically controlled stepping motors in a manner which is well known to the art. The electrode is of a wire or band configuration and is so supported, guided, and driven that the cutting portion of the electrode which is aligned with the workpiece before and during cutting remains properly oriented and travels without bend or distortion in its path. When the wire breaks, bows or otherwise is caused to lose tension, a switch is operated to interrupt machining power pulses being supplied to the machining gap. For this purpose, a switch is located at one or more critical and predetermined locations in the wire electrode path, with the switch actuator in each case in engagement with the wire during transversal.
摘要翻译：一种用于放电加工设备和机床的送丝保护系统。以通过电控步进电机的方式支撑工件以“X”和“Y”方向沿着两个坐标轴移动，这是本领域公知的。电极具有导线或带状构造，并且被支撑，引导和驱动，使得在切割之前和切割期间与工件对准的电极的切割部分保持正确定向并且在其路径中不弯曲或变形地行进。当线断开时，弓或其他方式导致张力失真，开关被操作以中断加工功率脉冲供给加工间隙。为此，开关位于线电极路径中的一个或多个临界和预定位置，其中开关致动器在每个情况下横向与导线接合。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式