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1. 发明授权

US5897795A Integral spring consumables for plasma arc torch using blow forward contact starting system 失效
标题翻译：用于等离子弧焊枪的整体式弹簧消耗件，采用前馈接触启动系统
公开(公告)号：US5897795A
公开(公告)日：1999-04-27
申请号：US727019
申请日：1996-10-08
申请人： Zhipeng Lu , Richard W. Couch, Jr. , Brian J. Currier
发明人： Zhipeng Lu , Richard W. Couch, Jr. , Brian J. Currier
IPC分类号： H05H1/34 , B23K10/00
CPC分类号： H05H1/34 , H05H2001/3457 , H05H2001/3468 , H05H2001/3489
摘要： Disclosed is a novel method and structure for contact starting a plasma arc torch. A translatable, electrically conductive component such as a nozzle or swirl ring is biased into contact with an electrode by a compliant spring element. A pilot arc is formed by first passing current through the electrode/component interface. Thereafter, the component is translated under the influence of gas pressure in a plasma chamber formed between the electrode and component, compressing the compliant element and initiating the pilot arc. The spring element may be maintained integrally with the nozzle, swirl ring, or a retaining cap, facilitating removal and replacement of the spring element with consumable components of the torch. Exemplary spring elements include wave spring washers, finger spring washers, curved spring washers, helical compression springs, flat wire compression springs, and slotted conical discs.
摘要翻译：公开了一种用于接触等离子弧焊炬的新方法和结构。诸如喷嘴或涡流环的可平移的导电部件被柔性弹簧元件偏置成与电极接触。首先通过电极通过电极/部件接口形成引弧。此后，在形成于电极和部件之间的等离子体室内，在气体压力的作用下使部件平移，压缩柔性元件并起动引导电弧。弹簧元件可以与喷嘴，涡流环或保持盖一体地保持，从而有助于使用手电筒的消耗部件移除和更换弹簧元件。示例性的弹簧元件包括波形弹簧垫圈，指状弹簧垫圈，弯曲弹簧垫圈，螺旋压缩弹簧，扁平线压缩弹簧和开槽锥形盘。

2. 发明授权

US5695662A Plasma arc cutting process and apparatus using an oxygen-rich gas shield 失效
公开(公告)号：US5695662A
公开(公告)日：1997-12-09
申请号：US595797
申请日：1996-02-02
申请人： Richard W. Couch, Jr. , Nicholas A. Sanders , Lifeng Luo , John Sobr
发明人： Richard W. Couch, Jr. , Nicholas A. Sanders , Lifeng Luo , John Sobr
IPC分类号： B23K10/00 , H05H1/34
CPC分类号： B23K10/006 , H05H1/341 , H05H2001/3421 , H05H2001/3426 , H05H2001/3442 , H05H2001/3457 , H05H2001/3468 , H05H2001/3478
摘要： A plasma arc torch has a secondary gas flow that is extremely large during piercing of a workpiece to keep splattered molten metal away from the torch and thereby prevent "double arcing". The secondary flow exits the torch immediately adjacent the transferred plasma arc and is an extremely uniform, swirling flow. A swirl ring is located in the secondary gas flow path at the exit point. A prechamber feeds gas to the swirl ring, which is in turn fed through a flow restricting orifice. For certain applications the secondary gas is a mixture of an oxidizing gas, preferably oxygen, and a non-oxidizing gas, preferably nitrogen, in a flow ratio of oxygen to nitrogen in the range of 2:3 to 9:1. Preferably the flow ratio is about 2:1. A network of conduits and solenoid valves operated under the control of a central microprocessor regulates the flows of plasma gas and secondary gas and mixes the secondary gas. The network includes valved parallel branches that provide a quick charge capability and a set of venting valves, also electrically actuated by the microprocessor, to provide a quick discharge. In a preferred high-definition embodiment, a nozzle with a cut back outer surface and a large, conical head allows a metal seal and enhanced cooling. A two-piece cap protects the nozzle during cutting.

3. 发明授权

US5166494A Process and apparatus for reducing electrode wear in a plasma arc torch 失效
标题翻译：用于减少等离子弧焊机中电极磨损的工艺和装置
公开(公告)号：US5166494A
公开(公告)日：1992-11-24
申请号：US682992
申请日：1991-04-12
申请人： Lifeng Luo , Nicholas A. Sanders , Richard W. Couch, Jr.
发明人： Lifeng Luo , Nicholas A. Sanders , Richard W. Couch, Jr.
IPC分类号： B23K10/00 , H05H1/34
CPC分类号： H05H1/341 , B23K10/00 , B23K10/006 , H05H2001/3421 , H05H2001/3426 , H05H2001/3442 , H05H2001/3457 , H05H2001/3468 , H05H2001/3478 , H05H2001/3494
摘要： A process and apparatus for reducing wear of an electrode in a plasma arc torch involves altering the gas flow in a plasma chamber surrounding the electrode immediately before and continuing after cutting of the current that sustains the arc. The altering includes closing off the gas flow upstream of the chamber, switching from a swirling flow to a radial/axial flow through the plasma chamber, reducing the arc current level in conjunction with either of the above, the venting the plasma chamber to rapidly change the gas flow and pressure in the chamber. The interval is sufficient to reduce electrode wear, but short enough that the arc remains stabilized until cut-off. In the flow stop mode, a solenoid valve is placed on an inlet tube for the plasma gas. Flow altering also occurs on start up. A gas preflow is established prior to pilot arc ignition. On transfer, the flow increases to its full operating value in conjunction with an increase in the arc current. The preflow can be axial, or partially axial. Also, the type or composition of the gas used in the preflow and in the operating flow can change during the start up from a less reactive to more reactive gas.
摘要翻译：用于减少等离子体电弧炬中的电极磨损的方法和装置包括在切割维持电弧的电流之前改变围绕电极的等离子体室中的气体流动并继续。改变包括关闭室上游的气流，从旋转流切换到穿过等离子体室的径向/轴向流动，与上述任一结合，减小电弧电流水平，使等离子体室排气以快速变化气室内的气流和压力。该间隔足以减少电极磨损，但足够短以使电弧保持稳定直到截止。在流动停止模式中，电磁阀被放置在等离子体气体的入口管上。启动时也会发生流量变化。在引燃电弧点火之前建立气体预流。在转移时，随着电弧电流的增加，流量增加到其全部运行值。预流可以是轴向的或部分轴向的。此外，在预热和操作流程中使用的气体的类型或组成可以在启动期间从较少的反应性到更多的反应性气体改变。

4. 发明授权

US5132512A Arc torch nozzle shield for plasma 失效
标题翻译：用于等离子体的弧焊枪护罩
公开(公告)号：US5132512A
公开(公告)日：1992-07-21
申请号：US718953
申请日：1991-06-21
申请人： Nicholas A. Sanders , Richard W. Couch, Jr.
发明人： Nicholas A. Sanders , Richard W. Couch, Jr.
IPC分类号： B23K10/00 , H05H1/28 , H05H1/30 , H05H1/34
CPC分类号： H05H1/341 , B23K10/006 , H05H1/34 , H05H1/28 , H05H1/30 , H05H2001/3421 , H05H2001/3426 , H05H2001/3442 , H05H2001/3457 , H05H2001/3468 , H05H2001/3478
摘要： A plasma arc cutting torch, particularly one operating in the 0-200 ampere range, has a shield mounted at its lower end adjacent a workpiece to block splattered molten metal from reaching a nozzle of the torch. The shield is electrically insulated, preferably by mounting it on an insulating ring that is itself secured on a cap screwed onto the torch body. A secondary gas flow through the torch passes through the space between the nozzle and the shield to provide cooling. Bleed ports in the shield allow an enhanced flow rate with the remaining flow being at a rate, in conjunction with the size of an exit orifice in the shield, to stabilize the plasma arc. The bleed ports are outwardly angled away from the arc. Canted ports in the secondary gas flow path, but before the bleed ports, produce a swirling of the gas flow which enhances the quality of the cut. A flow control system, preferably one utilizing parallel branch conduits and control valves, allows the selection of flow rates for the secondary gas depending on the cutting conditions.
摘要翻译：等离子体电弧割炬，特别是在0-200安培范围内操作的割炬，具有在其下端邻近工件安装的屏蔽件，以阻挡溅出的熔融金属到达焊炬的喷嘴。屏蔽层是电绝缘的，优选地将其安装在绝缘环上，绝缘环本身固定在拧在割炬本体上的帽上。通过手电筒的二次气流穿过喷嘴和屏蔽之间的空间，以提供冷却。护罩中的出血端口允许增加的流速，其余的流量与屏蔽件中的出口孔的尺寸一致，以稳定等离子体电弧。排出口远离电弧向外成角度。在二次气体流动路径中但在排出口之前的端口产生气流的旋转，这提高了切割的质量。流量控制系统，优选地使用并行分支导管和控制阀的流量控制系统允许根据切割条件选择二次气体的流速。

5. 发明授权

US5120930A Plasma arc torch with improved nozzle shield and step flow 失效
标题翻译：等离子弧焊枪具有改进的喷嘴屏蔽和阶梯流
公开(公告)号：US5120930A
公开(公告)日：1992-06-09
申请号：US395266
申请日：1989-08-17
申请人： Nicholas A. Sanders , Richard W. Couch, Jr.
发明人： Nicholas A. Sanders , Richard W. Couch, Jr.
IPC分类号： B23K10/00 , H05H1/28 , H05H1/30 , H05H1/34
CPC分类号： B23K10/00 , B23K10/006 , H05H1/34 , H05H1/341 , H05H1/28 , H05H1/30 , H05H2001/3421 , H05H2001/3426 , H05H2001/3442 , H05H2001/3457 , H05H2001/3468 , H05H2001/3478
摘要： A plasma arc cutting torch, particularly one operating in the 0-200 ampere range, has a shield mounted at its lower end adjacent a workpiece to block splattered molten metal from reaching a nozzle of the torch. The shield is electrically insulated, preferably by mounting it on an insulating ring that is itself secured on a cap screwed onto the torch body. A secondary gas flow through the torch passes through the space between the nozzle and the shield to provide cooling. Bleed ports in the shield allow an enhanced flow rate with the remaining flow being at a rate, in conjunction with the size of an exit orifice in the shield, to stabilize the plasma arc. The bleed ports are outwardly angled away from the arc. Canted ports in the secondary gas flow path, but before the bleed ports, produce a swirling of the gas flow which enhances the quality of the cut. A flow control system, preferably one utilizing parallel branch conduits and control valves, allows the selection of flow rates for the secondary gas depending on the cutting conditions.
摘要翻译：等离子体电弧割炬，特别是在0-200安培范围内操作的割炬，具有在其下端邻近工件安装的屏蔽件，以阻挡溅出的熔融金属到达焊炬的喷嘴。屏蔽层是电绝缘的，优选地将其安装在绝缘环上，绝缘环本身固定在拧在割炬本体上的帽上。通过手电筒的二次气流穿过喷嘴和屏蔽之间的空间，以提供冷却。护罩中的出血端口允许增加的流速，其余的流量与屏蔽件中的出口孔的尺寸一致，以稳定等离子体电弧。排出口远离电弧向外成角度。在二次气体流动路径中但在排出口之前的端口产生气流的旋转，这提高了切割的质量。流量控制系统，优选地使用并行分支导管和控制阀的流量控制系统允许根据切割条件选择二次气体的流速。

6. 发明授权

US4902871A Apparatus and process for cooling a plasma arc electrode 失效
标题翻译：用于冷却等离子弧电极的设备和方法
公开(公告)号：US4902871A
公开(公告)日：1990-02-20
申请号：US249407
申请日：1988-09-26
申请人： Nicholas A. Sanders , Richard W. Couch, Jr.
发明人： Nicholas A. Sanders , Richard W. Couch, Jr.
IPC分类号： B23K9/067 , B23K9/29 , B23K10/00 , H05H1/28 , H05H1/32 , H05H1/34 , H05H1/38
CPC分类号： B23K9/0671 , B23K9/296 , H05H1/28 , H05H1/32 , H05H1/34 , H05H1/38 , H05H2001/3415 , H05H2001/3426 , H05H2001/3468 , H05H2001/3489
摘要： In a plasma arc torch, an electrode is movable axially into and out of electrical connection with an anode, typically a nozzle secured to one end of a torch body. A flow of pressurized plasma gas is directed to a plasma chamber between the electrode and the nozzle, preferably through a replaceable swirl ring that closely surrounds and guides the electrode at a larger diameter shoulder portion of the electrode. A gas flow passage, preferably a spiral passage machined on the outer side surface of the shoulder portion, diverts a portion of the gas flow from the plasma chamber to a region above the electrode where it is vented to atmosphere. The passage is sufficiently constricted that a substantial pressure drop appears along the path, while at the same time allowing a sufficient flow to produce the desired cooling. The revolutions of the spiral are preferably closely spaced to enhance the surface area of the electrode in a heat transfer relationship with the cooling gas flow.
摘要翻译：在等离子弧焊炬中，电极可以轴向移动进入和离开与阳极电连接，通常是固定在炬体的一端的喷嘴。加压等离子体气体的流动被引导到电极和喷嘴之间的等离子体室，优选地通过可更换的旋转环，该可替换的旋转环紧密地围绕并引导电极在电极的更大直径的肩部。气体流动通道，优选地在肩部的外侧表面上加工的螺旋通道将气流从等离子体室的一部分转移到电极上方的一个区域，在那里它被排放到大气中。通道充分收缩，沿路径出现明显的压降，同时允许足够的流量产生所需的冷却。螺旋的旋转优选地紧密地间隔开，以增强电极与冷却气流的传热关系的表面积。

7. 发明授权

US4361748A Cooling and height sensing system for a plasma arc cutting tool 失效
标题翻译：用于等离子弧切割工具的冷却和高度检测系统
公开(公告)号：US4361748A
公开(公告)日：1982-11-30
申请号：US230025
申请日：1981-01-30
申请人： Richard W. Couch, Jr.
发明人： Richard W. Couch, Jr.
IPC分类号： B23K10/00 , H05H1/28 , B23K9/00
CPC分类号： B23K10/00
摘要： A plasma arc cutting torch cools its nozzle with a water flow between an inner metallic nozzle member and an outer ceramic nozzle member. A set of auxiliary ports formed in the ceramic element each extend from an associated radial channel that directs a portion of the water to the plasma arc where it forms an annular "jet" that constricts the arc. The auxiliary ports are located and sized to provide an enhanced flow of water through the nozzle while maintaining an optimal flow rate through the radial channel. When a gas flow through the cooling passages is used to sense the height of the torch over a workpiece, the gas flow through the auxiliary ports clears residual water from the nozzle to avoid a false height sensing due to an emission of droplets of the water.
摘要翻译：等离子弧切割炬在内部金属喷嘴构件和外部陶瓷喷嘴构件之间的水流中冷却其喷嘴。形成在陶瓷元件中的一组辅助端口各自从将一部分水引导到等离子弧的相关联的径向通道延伸，在那里形成限制电弧的环形“射流”。辅助端口的位置和尺寸适于提供通过喷嘴的增强的水流，同时保持通过径向通道的最佳流速。当使用气体流过冷却通道的气体来感测焊炬在工件上的高度时，通过辅助端口的气体流动从喷嘴中清除残留的水，以避免由于水滴的发射引起的假高度感测。

8. 再颁专利

USRE46925E1 Composite electrode for a plasma arc torch 有权
公开(公告)号：USRE46925E1
公开(公告)日：2018-06-26
申请号：US13352916
申请日：2012-01-18
申请人： David J. Cook , Kirk H. Ferland , Charles M. Hackett , Yong Yang , Richard W. Couch, Jr. , Zhipeng Lu
发明人： David J. Cook , Kirk H. Ferland , Charles M. Hackett , Yong Yang , Richard W. Couch, Jr. , Zhipeng Lu
IPC分类号： H05H1/34 , B23K20/12 , B23K35/04 , B23K35/02
CPC分类号： H05H1/34 , H05H2001/3436 , H05H2001/3442
摘要： A plasma arc torch that includes a torch body having a nozzle mounted relative to a composite electrode in the body to define a plasma chamber. The torch body includes a plasma flow path for directing a plasma gas to the plasma chamber in which a plasma arc is formed. The nozzle includes a hollow, body portion and a substantially solid, head portion defining an exit orifice. The composite electrode can be made of a metallic material (e.g., silver) with high thermal conductivity in the forward portion electrode body adjacent the emitting surface, and the aft portion of the electrode body is made of a second low cost, metallic material with good thermal and electrical conductivity. This composite electrode configuration produces an electrode with reduced electrode wear or pitting comparable to a silver electrode, for a price comparable to that of a copper electrode.

9. 发明授权

US5756959A Coolant tube for use in a liquid-cooled electrode disposed in a plasma arc torch 失效
标题翻译：用于设置在等离子弧焊炬中的液冷电极的冷却剂管
公开(公告)号：US5756959A
公开(公告)日：1998-05-26
申请号：US738723
申请日：1996-10-28
申请人： Jennifer L. Freeman , Zhipeng Lu , Richard W. Couch, Jr. , Roger L. Kenyon
发明人： Jennifer L. Freeman , Zhipeng Lu , Richard W. Couch, Jr. , Roger L. Kenyon
IPC分类号： B23K10/00 , H05H1/28 , H05H1/34
CPC分类号： H05H1/28 , B23K10/00 , H05H2001/3436
摘要： A coolant tube for a liquid-cooled electrode disposed a plasma arc torch does not become damaged during an electrode blow-out condition. The coolant tube includes a hollow member and a substantially solid member. The hollow member has a first end, a second end and a coolant passage extending between the first and second ends. The first end can be secured within the torch such that the coolant tube is disposed adjacent the interior surface of the electrode and such that the coolant passage is in fluid communication with a coolant supply. The substantially solid member extends from the second end of the hollow member and has at least one flow restriction orifice extending therethrough. Each flow restriction orifice is fluid communication with the coolant passage for providing at least one high velocity jet of coolant to the interior surface of the electrode.
摘要翻译：用于设置等离子弧焊炬的液冷电极的冷却剂管在电极吹出状态下不会损坏。冷却剂管包括中空构件和基本上实心的构件。中空构件具有在第一和第二端之间延伸的第一端，第二端和冷却剂通道。第一端可以固定在割炬内，使得冷却剂管邻近电极的内表面设置，使得冷却剂通道与冷却剂供应源流体连通。基本上实心的构件从中空构件的第二端延伸并且具有延伸穿过其中的至少一个限流孔。每个流动限制孔与冷却剂通道流体连通，用于向电极的内表面提供至少一个高速喷射的冷却剂。

10. 发明授权

US5548097A Plasma arc cutting torch ignition circuit and method providing a forced arc transfer function 失效
标题翻译：等离子弧切割割炬点火电路和方法提供强制电弧传递功能
公开(公告)号：US5548097A
公开(公告)日：1996-08-20
申请号：US361730
申请日：1994-12-22
申请人： Richard W. Couch, Jr , Lifeng Luo , Jeffrey L. Peterson
发明人： Richard W. Couch, Jr , Lifeng Luo , Jeffrey L. Peterson
IPC分类号： H05H1/36 , B23K10/00
CPC分类号： H05H1/36
摘要： Circuitry and methods for reducing nozzle wear during starting of a plasma arc torch, even with a large standoff distance from a workpiece is described. The invention features a method of starting a plasma arc torch for cutting a workpiece using a pilot voltage to ionize a plasma gas and generate a pilot arc between an electrode and a nozzle. The method expedites the transfer of the arc from the nozzle to the workpiece by passing a generally smooth signal through the electrode before, during and after the arc transfers to the workpiece. A high frequency high voltage starting circuit is constructed with a pilot arc circuit isolated from a transfer arc circuit. A signal is generated which has a magnitude sufficient to ionizes a plasma gas to generate a pilot arc between the electrode and the nozzle and has a magnitude which generally increases after the pilot arc has been generated in order to expedite the transfer of the arc. The signal magnitude is, however, low enough to minimize transfer of the arc back to the nozzle.
摘要翻译：描述了在等离子体电弧割炬启动期间减少喷嘴磨损的电路和方法，即使距离工件的间隔距离较大。本发明的特征在于，使用等离子体电弧起动等离子体电弧焊炬来切割工件的方法，该导电电压使等离子气体离子化，并在电极和喷嘴之间产生引导电弧。该方法通过在电弧转移到工件之前，期间和之后通过电极通过电极，从而将电弧从喷嘴传递到工件。高频高压启动电路由与转移电弧电路隔离的导通电弧电路构成。产生一个信号，该信号具有足够的离子化等离子体气体的大小，以在电极和喷嘴之间产生引导电弧，并且具有在产生导电电弧之后通常增加的量值，以便加速电弧的传递。然而，信号幅度足够低以使电弧返回到喷嘴的传递最小化。

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