专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP0747158A4 POWER SUPPLY SYSTEM FOR ELECTRIC DISCHARGE MACHINE AND ELECTRIC DISCHARGE MACHINING METHOD 失效
标题翻译：电源装置为RADIO电火花放电加工机和方法
公开(公告)号：EP0747158A4
公开(公告)日：2000-07-19
申请号：EP95941837
申请日：1995-12-21
申请人： SODICK CO LTD
发明人： KANEKO YUJI , TOYONAGA TATSUO
IPC分类号： B23H1/02 , B23H7/04
CPC分类号： B23H1/022 , B23H7/04 , B23H2300/22
摘要： A power supply circuit (8) includes a D.C. power supply (8A), a switching device (8B) and a diode (8C). A transformer (12) includes a ring core (13A), a primary winding (13B) and a secondary winding (13C). The switching device (8B) is turned on and off by a signal pulse supplied from a pulse generator (5) and supplies a D.C. current pulse to the primary side of the transformer (12). An inverter (15) inserted between the power supply circuit (8) and the transformer (12) includes switches (151, 152, 153 and 154) and is controlled by a signal from a relay circuit. While the switches (151 and 152) are closed, the switches (153 and 154) are open. The first half wave of an A.C. voltage pulse induced on the secondary side of the transformer (12) is supplied to a machining gap formed between a wire (1) and a workpiece (3) in the direction from the wire (1) to the workpiece (3). The second half wave is subsequently supplied to the machining gap in the direction from the workpiece (3) to the wire (1). At this time, the voltage waveform of the A.C. pulse is biased to the positive side of the potential of the workpiece (3) with respect to that of the wire (1). The workpiece (1) is, desirably, not coated with the material of the wire (1). When the switches (151 and 152) are opened and the switches (153 and 154) are closed, the A.C. voltage pulse induced on the secondary side of the transformer (12) is biased to the negative side.

2. 发明公开

EP0916440A4 SYSTEM AND METHOD FOR WIRE CUT DISCHARGE MACHINING 失效
标题翻译：系统和方法丝电火花线切割加工
公开(公告)号：EP0916440A4
公开(公告)日：2002-01-02
申请号：EP98905822
申请日：1998-03-09
申请人： SODICK CO LTD
发明人： TOYONAGA TATSUO , KANEKO YUJI , MINAMIKAWA MASATERU
IPC分类号： B23H7/10
CPC分类号： B23H7/104
摘要： A wire cut discharge machining system provided with a drawing equipment (6) for drawing a wire electrode (1) so that the wire electrode (1) can travel along a wire carriage path, a servo motor (4B) which applies tension to a traveling wire electrode, an NC unit (10) which generates a signal to indicate the set value of the tension, a tension detector (9) which detects the tension applied to the wire electrode and then generates a signal to show the detected value of the tension, and a tension controller (13) which processes the signal to indicate the set value of the tension and the signal to indicate the detected value of the tension, and then generates a speed command signal to command the rotational speed of the servo motor. The tension controller includes an unwanted frequency setting circuit (20) which sets unwanted frequencies and then generates signals to indicate the set values, and an electric filter device (19) which eliminates unwanted frequencies based on the output signals of the unwanted frequency setting circuit.

3. 发明公开

EP0698440A4 POWER SUPPLY SYSTEM FOR AN ELECTRIC DISCHARGE MACHINE 失效
标题翻译：电力网络放电加工机
公开(公告)号：EP0698440A4
公开(公告)日：1998-02-25
申请号：EP95909111
申请日：1995-02-17
申请人： SODICK CO LTD
发明人： KANEKO YUJI , UEDA TADAO , WATANABE YOSHIHIRO , TOYONAGA TATSUO
IPC分类号： B23H1/02 , B23H7/04
CPC分类号： B23H1/022 , B23H1/02 , B23H2300/22
摘要： A transformer for converting a high frequency direct current pulse transferred from a power supply unit disposed separated from a gap formed between a tool electrode and a workpiece and having a direct current power source and a switching element through a coaxial cable to a high frequency alternate current pulse is provided so as to be connected to the gap. The transformer includes a ring core, a primary winding connected to the coaxial cable and a secondary winding connected to the gap. It is preferable that these windings each have a minimum number of windings. Furthermore, a by-pass means is provided for allowing a direct current pulse from the direct current power source and an alternate current pulse induced by the transformer to selectively flow through the gap. It is preferable that the by-pass means and the transformer be installed collectively in a case disposed in the vicinity of the processing gap.

4. 发明公开

EP1116541A4 POWER SUPPLY FOR ELECTRODISCHARGE MACHINING AND METHOD OF ELECTRODISCHARGE MACHINING 有权
标题翻译：电源的放电加工机，和方法的放电加工机
公开(公告)号：EP1116541A4
公开(公告)日：2005-01-19
申请号：EP00935520
申请日：2000-06-01
申请人： SODICK CO LTD
发明人： KANEKO YUJI , SADAMITSU DAISUKE , GU ZHANBO
IPC分类号： B23H1/02
CPC分类号： B23H1/022 , B23H2300/20 , B23H2300/22
摘要： A power supply (100) for electrodischarge machining supplies current pulses to a gap (3) between a tool electrode (1) and a workpiece (2). The power supply comprises a DC power supply (E); first switching elements (Tr1-Trn) connected between the DC power supply and the gap; capacitors (C1-C8) connected in parallel with the gap; a second switching element (67) for controlling the currents flowing from the capacitors to the gap; a detector (50) for detecting a start of electrical discharge; and a controller (20) for controlling the first switching element and the second switching element in response to the detector. Current flows from the direct current power supply to the gap through the first switching element for a first period ( tau ON) from a start of electrical discharge, and current flows from the capacitor to the gap through the second switching element for a second period (T) shorter than the first period from a start of electrical discharge.

5. 发明公开

EP0812643A4 DEVICE AND METHOD FOR ELECTRIC DISCHARGE MACHINING 失效
标题翻译：电火花的设备和方法
公开(公告)号：EP0812643A4
公开(公告)日：2000-08-23
申请号：EP96943348
申请日：1996-12-27
申请人： SODICK CO LTD
发明人： KANEKO YUJI , TOYONAGA TATSUO
IPC分类号： B23H1/02
CPC分类号： B23H1/022
摘要： A device for electric discharge machining comprising a discharge detector (30) for detecting discharge generated in a machining gap; a pulse generator (41) for generating a pulse signal adapted to stop functioning in response to the discharge detector after discharging starts; first switching circuits (22A, 22D) for applying to the machining gap a voltage pulse of one of polarities in response to a pulse signal; second switching circuits (22B, 22C) for applying to the machining gap a voltage pulse of the other polarity in response to a pulse signal; a flip-flop (46) for maintaining one of two states; gate circuits (42, 43) for supplying a pulse signal to the first switching circuits when the one state is held in the flip-flop, while supplying a pulse signal to the second switching circuits when the other state is held therein; circuits (CK, 48, 49) for supplying a high-frequency pulse to the flip-flop during duration of the pulse signal; a circuit (44) for supplying a single pulse to the flip-flop every time the supply of pulse signals halts; and a machining current supply circuit (10) for supplying machining current to the machining gap in response to the discharge detector after discharging has started.

6. 发明公开

EP0757930A4 POWER SUPPLY SYSTEM FOR AN ELECTRIC DISCHARGE MACHINE 失效
标题翻译：电源系统的放电加工机
公开(公告)号：EP0757930A4
公开(公告)日：1999-08-18
申请号：EP95917470
申请日：1995-04-26
申请人： SODICK CO LTD
发明人： KANEKO YUJI , UEDA TADAO
IPC分类号： B23H1/02 , B23H7/04
CPC分类号： B23H1/022 , B23H2300/20 , B23H2300/22
摘要： A first power source circuit (8), a second power source circuit (6) and a power source circuit (9) are connected to a power supply unit (5). The first power source circuit includes a direct current power source (8A) and a switching element (8B). The power source circuit (8) does not substantially include a resistor and has a relatively low inductance value and a low impedance value properties. The power source circuit (6) includes a direct current power source (6A), a switching element (6B) and a current limiting resistor (6C). The power source circuits (6, 8, 9) use a cable (11) as a common wiring and are connected to a gap. The power source circuit (8), the conductor (11), a coupling transformer (13) and the gap constitute a high frequency alternate current circuit. At this time switches (6F, 6G, 9F, 9G) provided in the power source circuits (6, 9) are opened so as to completely separate the power source circuits (6, 9) from the high frequency alternate circuit. These switches (6G, 6F, 9F, 9G) are used to completely separate the power source circuit (6) from the power source circuit (8) or connect them for complete conduction, and therefore it is desirable that they comprise butt joint type switching devices. In addition, at this time, it is desirable to use a detecting device (30) having a photocoupler (35) and suited to high frequency alternate current as a means for detecting the voltage of the gap.

7. 发明公开

EP0803307A4 METHOD AND INSTRUMENT FOR DETERMINING POSITION WHERE WIRE ELECTRODE IS IN CONTACT WITH WORKPIECE 失效
标题翻译：方法和设备来确定位置，电线和工作相互接触
公开(公告)号：EP0803307A4
公开(公告)日：1998-11-25
申请号：EP96937556
申请日：1996-11-11
申请人： SODICK CO LTD
发明人： TOYONAGA TATSUO , KANEKO YUJI
IPC分类号： B23H1/02 , B23H7/02 , B23H7/04 , B23H7/06 , B23H7/14
CPC分类号： B23H7/065 , B23H2500/20
摘要： A method for determining the position where a wire-like tool electrode is in contact with a workpiece includes a step at which the wire tool electrode is brought near to the reference position of the workpiece by moving either the wire tool electrode or the workpiece relative to the other in a plane, a step at which a voltage is applied between the wire vertical to the plane and the workpiece, a step at which the contact between the reference position of the workpiece with the wire is detected, a step at which the reference position of the workpiece is positioned nearly at the center of vibration of the wire, a step at which the coordinate data denoting the position of the wire with respect to the workpiece is generated, and a step at which the position where the wire is in contact with the workpiece is found based on the coordinate data.

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