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1.发明授权Apparatus and method for starting and stopping a plasma arc torch used for mechanized cutting and marking applications 失效用于启动和停止用于机械切割和标记应用的等离子弧焊炬的装置和方法
公开(公告)号：US5760363A
公开(公告)日：1998-06-02
申请号：US707227
申请日：1996-09-03
摘要： A plasma arc torch apparatus and method for cutting or marking a workpiece includes a torch having an electrode and a nozzle coupled to a power supply, and a plasma gas source coupled to a fluid line for delivering plasma gas to the torch. A flow restriction member is disposed in the fluid line adjacent the torch and causes the pressure of the plasma gas in the torch to gradually increase during start up thus creating a stable plasma arc. A three-way valve is disposed in the fluid line downstream of the flow restriction member and has an inlet, a torch outlet, and a vent outlet. The inlet is in fluid communication with the torch outlet for delivering plasma gas to the torch when the valve is in the open position, and the torch outlet is in fluid communication with the vent outlet when the valve is in the vent position, for rapidly dissipating the gas in the plasma chamber of the torch to atmosphere after the arc has been extinguished. The rapid reduction of the gas pressure in the torch reduces the cycle time, enabling the torch to be restarted more quickly after completion of a prior cutting cycle.
摘要翻译： 用于切割或标记工件的等离子弧焊枪装置和方法包括具有连接到电源的电极和喷嘴的焊炬以及耦合到用于将等离子体气体输送到割炬的流体管线的等离子体气体源。 流动限制构件设置在与割炬相邻的流体管线中，并且在启动期间使得手电筒中的等离子体气体的压力逐渐增加，从而产生稳定的等离子体电弧。 三通阀设置在流动限制构件下游的流体管线中，并具有入口，火炬出口和排气口。 入口与火炬出口流体连通，当阀门处于打开位置时，将等离子体气体传送到割炬，当阀门处于通风位置时，火炬出口与排气口处于流体连通状态，以快速消散 火炬等离子体中的气体在电弧熄灭后到大气中。 手电筒中气体压力的快速降低减少了循环时间，从而能够在完成先前的切削循环之后更快地重新启动割炬。
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2.发明授权Integral spring consumables for plasma arc torch using blow forward contact starting system 失效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
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。
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3.发明授权Apparatus and method for improved assembly concentricity in a plasma arc torch 失效用于改进等离子弧焊炬组装同心度的装置和方法
公开(公告)号：US5841095A
公开(公告)日：1998-11-24
申请号：US736707
申请日：1996-10-28
CPC分类号： H05H1/38 , H05H2001/3442 , H05H2001/3478
摘要： Disclosed is a method and structure for improving alignment of a plasma arc with an axial centerline of a plasma arc torch. At least one of an electrode and nozzle are mounted in respective bores of a cathode block and torch body using a radial spring element. By concentrically machining the bores along an axial centerline of the torch and centering the consumable components within the bores using the spring elements, an insert disposed in a tip of the electrode is axially aligned with an orifice formed in a tip of the nozzle. Asymmetric wear of the nozzle orifice due to a skewed arc path is markedly reduced or eliminated. The torch may be employed in computer controlled cutting and marking systems to produce components or workpieces with reduced dimensional and angular errors.
摘要翻译： 公开了一种用于改善等离子体电弧与等离子弧焊炬的轴向中心线的对准的方法和结构。 使用径向弹簧元件将电极和喷嘴中的至少一个安装在阴极块和割炬本体的相应孔中。 通过沿着手电筒的轴向中心线同心地加工孔，并使用弹簧元件将消耗部件定心在孔内，设置在电极的尖端中的插入件与形成在喷嘴的尖端中的孔口轴向对准。 由于偏斜电弧路径引起的喷嘴孔的不对称磨损显着降低或消除。 手电筒可用于计算机控制的切割和标记系统，以产生具有减小的尺寸和角度误差的部件或工件。
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4.发明授权Process for high quality plasma arc and laser cutting of stainless steel and aluminum 失效高品质等离子弧和不锈钢和铝激光切割工艺
公开(公告)号：US5653896A
公开(公告)日：1997-08-05
申请号：US711162
申请日：1996-09-09
CPC分类号： B23K26/123 , B23K10/00 , B23K26/12 , B23K26/125 , B23K26/1429 , B23K35/38 , B23K2203/05 , B23K2203/10
摘要： Plasma arc or laser cutting uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut varies as a percentage of the total gas flow to maintain a reducing atmosphere down through the cut, but to leave a predominantly oxidizing atmosphere at the intersection of the cut and the bottom surface of the sheet being cut. In plasma arc cutting these flows can also be characterized as either a plasma gas flow, one that forms the arc, or a shield gas flow that surrounds the arc. The reactive gas is preferably a flow of air, oxygen, nitrogen, carbon dioxide or a combination of these gases. The reducing gas is preferably hydrogen, hydrogen 35, methane, or a mixture of these gases. For aluminum, the reactive gas is preferably air or nitrogen and the reducing gas is preferably methane or a mixture of methane and air. In laser cutting the reducing gases such as methane can be used by mixing them with reactive assist gases.
摘要翻译： 等离子弧或激光切割使用反应和还原气流的混合来切割不锈钢，铝和其他有色金属。 到切割的还原气体流量以总气体流量的百分比变化，以通过切割保持还原气氛，但是在被切割的片材的切割和底部表面的交叉处留下主要的氧化气氛。 在等离子体电弧切割中，这些流动也可以表征为等离子体气流，形成电弧的气流或围绕电弧的保护气体流。 反应气体优选为空气，氧气，氮气，二氧化碳或这些气体的组合。 还原气体优选为氢气，氢气，甲烷或这些气体的混合物。 对于铝，反应性气体优选为空气或氮气，并且还原气体优选为甲烷或甲烷和空气的混合物。 在激光切割中，还原气体如甲烷可以通过将其与活性助剂气体混合来使用。
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5.发明授权
公开(公告)号：US5414236A
公开(公告)日：1995-05-09
申请号：US989183
申请日：1992-12-11
CPC分类号： B23K26/123 , B23K10/00 , B23K26/125 , B23K26/1423 , B23K35/38 , B23K2203/05 , B23K2203/10
摘要： A plasma arc torch uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut is varied as a percentage of the total gas flow to maintain a reducing atmosphere down through the cut, but to leave a predominantly oxidizing atmosphere at the intersection of the cut and the bottom surface of the sheet being out. These flows can also be characterized as either a plasma gas flow, one that forms the arc, or a shield gas flow that surrounds the arc. The reactive gas is preferably a flow of air, oxygen, nitrogen, carbon dioxide or a combination of these gases. The reactive gas is usually in the plasma gas flow, whether alone or mixed with other gases. The reducing gas is preferably hydrogen, hydrogen 35, methane, or a mixture of these gases. For aluminum, the reactive gas is preferably air or nitrogen and the reducing gas is preferably methane or a mixture of methane and air.
摘要翻译： 等离子弧焊炬使用反应和还原气流混合切割不锈钢，铝和其他有色金属片。 进入切割的还原气体流量以总气体流量的百分比而变化，以通过切割保持还原气氛，但在片材的切割和底部表面的交叉点处留下主要的氧化气氛。 这些流动也可以表征为等离子体气体流，形成电弧的流动或围绕电弧的屏蔽气体流。 反应气体优选为空气，氧气，氮气，二氧化碳或这些气体的组合。 反应气体通常处于等离子体气体流中，无论是单独还是与其他气体混合。 还原气体优选为氢气，氢气，甲烷或这些气体的混合物。 对于铝，反应性气体优选为空气或氮气，并且还原气体优选为甲烷或甲烷和空气的混合物。
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6.发明授权Process for high quality plasma arc and laser cutting of stainless steel and aluminum 失效高品质等离子弧和不锈钢和铝激光切割工艺
公开(公告)号：US5380976A
公开(公告)日：1995-01-10
申请号：US24416
申请日：1993-03-01
CPC分类号： B23K26/123 , B23K10/00 , B23K26/12 , B23K26/125 , B23K26/1429 , B23K35/38 , B23K2203/05 , B23K2203/10
摘要： Plasma arc or laser cutting uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut varies as a percentage of the total gas flow to maintain a reducing atmosphere down through the cut, but to leave a predominantly oxidizing atmosphere at the intersection of the cut and the bottom surface of the sheet being cut. In plasma arc cutting these flows can also be characterized as either a plasma gas flow, one that forms the arc, or a shield gas flow that surrounds the arc. The reactive gas is preferably a flow of air, oxygen, nitrogen, carbon dioxide or a combination of these gases. The reducing gas is preferably hydrogen, hydrogen 35, methane, or a mixture of these gases. For aluminum, the reactive gas is preferably air or nitrogen and the reducing gas is preferably methane or a mixture of methane and air. In laser cutting the reducing gases such as methane can be used by mixing them with reactive assist gases.
摘要翻译： 等离子弧或激光切割使用反应和还原气流的混合来切割不锈钢，铝和其他有色金属。 到切割的还原气体流量以总气体流量的百分比变化，以通过切割保持还原气氛，但是在被切割的片材的切割和底部表面的交叉处留下主要的氧化气氛。 在等离子体电弧切割中，这些流动也可以表征为等离子体气流，形成电弧的气流或围绕电弧的保护气体流。 反应气体优选为空气，氧气，氮气，二氧化碳或这些气体的组合。 还原气体优选为氢气，氢气，甲烷或这些气体的混合物。 对于铝，反应性气体优选为空气或氮气，并且还原气体优选为甲烷或甲烷和空气的混合物。 在激光切割中，还原气体如甲烷可以通过将其与活性助剂气体混合来使用。
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公开(公告)号：US07659488B2
公开(公告)日：2010-02-09
申请号：US11495945
申请日：2006-07-28
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： B23K10/00
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.
摘要翻译： 一种等离子弧焊炬，其包括具有相对于主体中的复合电极安装的喷嘴的炬体，以限定等离子体室。 手电筒包括用于将等离子体气体引导到形成等离子体电弧的等离子体室的等离子体流动路径。 喷嘴包括中空的主体部分和限定出口的基本上固体的头部。 复合电极可以由邻近发射表面的前部电极体中具有高导热性的金属材料（例如银）制成，并且电极体的后部由具有良好的第二低成本金属材料制成 导热和导电性。 这种复合电极配置产生与电极相当的电极磨损或点蚀的电极，其价格与铜电极相当。
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公开(公告)号：US07049540B2
公开(公告)日：2006-05-23
申请号：US10784084
申请日：2004-02-20
申请人： Nicholas A. Sanders , Richard W. Couch, Jr. , Yong Yang , Zhipeng Lu , Robert C. Dean , Charles M. Hackett
发明人： Nicholas A. Sanders , Richard W. Couch, Jr. , Yong Yang , Zhipeng Lu , Robert C. Dean , Charles M. Hackett
IPC分类号： B23K10/00
摘要： A metal jet cutting system, which includes a jetting heat, a heater and a power source, is used for modifying a workpiece. The jetting head includes a crucible and an inlet for receiving a feed stock of a conductive material. The heater melts the conductive material in the crucible to provide a conductive fluid, which exits the jetting head via an outlet. The power source, which is in electrical communication with the conductive fluid, increases the temperature of the conductive fluid. The conductive fluid is applied to the workpiece to modify the workpiece.
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公开(公告)号：US5558786A
公开(公告)日：1996-09-24
申请号：US319470
申请日：1994-10-06
CPC分类号： B23K26/123 , B23K10/00 , B23K26/12 , B23K26/125 , B23K26/1429 , B23K35/38 , B23K2203/05 , B23K2203/10
摘要： Plasma arc or laser cutting uses a mix of reactive and reducing gas flows to cut sheets of stainless steel, aluminum and other non-ferrous metals. The reducing gas flow to the cut varies as a percentage of the total gas flow to maintain a reducing atmosphere down through the cut, but to leave a predominantly oxidizing atmosphere at the intersection of the cut and the bottom surface of the sheet being cut. In plasma arc cutting these flows can also be characterized as either a plasma gas flow, one that forms the arc, or a shield gas flow that surrounds the arc. The reactive gas is preferably a flow of air, oxygen, nitrogen, carbon dioxide or a combination of these gases. The reducing gas is preferably hydrogen, hydrogen 35, methane, or a mixture of these gases. For aluminum, the reactive gas is preferably air or nitrogen and the reducing gas is preferably methane or a mixture of methane and air. In laser cutting the reducing gases such as methane can be used by mixing them with reactive assist gases.
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公开(公告)号：US5310988A
公开(公告)日：1994-05-10
申请号：US886067
申请日：1992-05-20
申请人： Richard W. Couch, Jr. , Nichols A. Sanders , Lifeng Luo , Zhipeng Lu , Patrik Backander , John Sobr
发明人： Richard W. Couch, Jr. , Nichols A. Sanders , Lifeng Luo , Zhipeng Lu , Patrik Backander , John Sobr
CPC分类号： H05H1/34 , H05H2001/3442 , H05H2001/3452
摘要： The diameter of a hafnium insert press fit into the bottom end of a copper electrode varies as a function of the level of current carried by the electrode. The diameter is the minimum necessary to support emission at that current level while also protecting the copper body against attack by the arc. The insert is generally circular and preferably extends completely through the bottom wall to a circulating flow of cooling water at a hollow interior of the electrode. The bottom wall includes an annular recess in a portion of the copper wall surrounding the insert. A coolant inlet tube extends into the recess in a spaced relationship to provide a high flow velocity of the coolant over the interior rear surface of the electrode.
摘要翻译： 掺入铜电极底端的铪片插入物的直径根据电极承载的电流水平而变化。 直径是支持当前级别发射所必需的最小值，同时还可以保护铜体免受电弧的侵袭。 插入件通常是圆形的，并且优选地完全穿过底壁延伸到在电极的中空内部的冷却水的循环流。 底壁包括围绕插入件的铜壁的一部分中的环形凹部。 冷却剂入口管以间隔开的方式延伸到凹部中，以提供冷却剂在电极内表面上的高流速。
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