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    Composite electrode for a plasma arc torch
    1.
    发明授权
    Composite electrode for a plasma arc torch 有权
    等离子弧焊炬复合电极

    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。

    Integral spring consumables for plasma arc torch using blow forward contact starting system
    8.
    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

    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。

    Apparatus and method for starting and stopping a plasma arc torch used for mechanized cutting and marking applications
    9.
    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

    申请人： Elizabeth B. Hackett ,  Timothy M. Brewer ,  Zhipeng Lu ,  Richard W. Couch, Jr.

    发明人： Elizabeth B. Hackett ,  Timothy M. Brewer ,  Zhipeng Lu ,  Richard W. Couch, Jr.

    IPC分类号： B23K10/00 ,  H05H1/26

    CPC分类号： H05H1/26 ,  B23K10/00

    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。

    Apparatus and method for improved assembly concentricity in a plasma arc torch
    10.
    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

    申请人： Zhipeng Lu ,  Richard W. Couch, Jr. ,  Jennifer L. Freeman

    发明人： Zhipeng Lu ,  Richard W. Couch, Jr. ,  Jennifer L. Freeman

    IPC分类号： B23K10/00 ,  H05H1/34 ,  H05H1/38

    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。