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    Plasma arc torch and method for cutting a workpiece
    1.
    发明授权
    Plasma arc torch and method for cutting a workpiece 有权
    等离子弧焊枪和切割工件的方法

    公开(公告)号：US06337460B2

    公开(公告)日：2002-01-08

    申请号：US09772260

    申请日：2001-01-29

    申请人： Milind G. Kelkar ,  Kevin D. Horner-Richardson ,  Jesse A. Roberts ,  Geoffrey H. Putnam ,  David A. Small

    发明人： Milind G. Kelkar ,  Kevin D. Horner-Richardson ,  Jesse A. Roberts ,  Geoffrey H. Putnam ,  David A. Small

    IPC分类号： B23K1000

    CPC分类号： H05H1/34 ,  H05H1/3405 ,  H05H2001/3436 ,  H05H2001/3442 ,  H05H2001/3457 ,  H05H2001/3478

    摘要： A plasma arc torch and method for cutting a workpiece in which the torch has a primary gas flow path for receiving a primary working gas and directing it through the torch to a central exit opening of the torch for exhaustion from the torch onto the workpiece in the form of an ionized plasma. A secondary gas flow path in the torch receives a secondary gas separate from the primary working gas and directs it through the torch. The primary gas flow path is in fluid communication with the secondary gas flow path substantially upstream of the central exit opening of the torch to bleed primary working gas in the primary gas flow path into the secondary gas flow path for admixture therewith to form a secondary gas mixture to be exhausted from the torch.

    摘要翻译： 一种用于切割工件的等离子弧焊炬和方法，其中炬具有用于接收初级工作气体的初级气体流动路径，并将其引导通过炬到炬的中心出口，用于从喷枪向工件排出 离子化等离子体的形式。 手电筒中的二次气体流动路径接收与主工作气体分离的二次气体并将其引导通过火炬。 主要气体流动路径基本上在喷枪的中心出口开口的上游处与二次气体流动路径流体连通，以将初级气体流动路径中的初级工作气体排放到二次气体流动路径中，以与其混合形成二次气体 混合物从火炬中耗尽。

    Plasma arc torch and method for improved life of plasma arc torch consumable parts
    2.
    发明授权
    Plasma arc torch and method for improved life of plasma arc torch consumable parts 有权

    公开(公告)号：US06987238B2

    公开(公告)日：2006-01-17

    申请号：US09821868

    申请日：2001-03-30

    申请人： Kevin D. Horner-Richardson ,  David A. Small ,  Jesse A. Roberts

    发明人： Kevin D. Horner-Richardson ,  David A. Small ,  Jesse A. Roberts

    IPC分类号： B23K10/00

    CPC分类号： H05H1/34 ,  H05H2001/3478

    摘要： A plasma arc torch and method for improving the life of the consumable parts of the plasma arc torch, including the electrode, the tip and the shield cap. The method includes turbulating gas as it flows over the exposed surfaces of the electrode, tip and shield cap to increase turbulence in the hydrodynamic boundary layer of the gas flow, thereby enhancing convective heat transfer. The result of enhanced cooling is improved consumable parts life. For example, to increase the turbulence of the gas flow over the outer surface of the electrode, the plasma arc torch electrode has a roughened, or textured outer surface formed with dimples, axially extending grooves or spiraling grooves formed in the outer surface of the electrode. The inner and outer surfaces of the tip and the inner surface of the shield cap are similarly textured.

    Plasma arc torch
    3.
    发明授权
    Plasma arc torch 有权
    等离子弧焊炬

    公开(公告)号：US06163008A

    公开(公告)日：2000-12-19

    申请号：US457944

    申请日：1999-12-09

    申请人： Jesse A. Roberts ,  Kevin D. Horner-Richardson ,  David A. Small ,  Gene V. Hewes

    发明人： Jesse A. Roberts ,  Kevin D. Horner-Richardson ,  David A. Small ,  Gene V. Hewes

    IPC分类号： H05H1/34 ,  B23K10/00

    CPC分类号： H05H1/34 ,  H05H2001/3478

    摘要： A plasma arc torch has a cathode and electrode having connecting ends configured for a coaxial telescoping connection with one another on a central longitudinal axis of the torch. The connecting ends have interengageable detents thereon, with at least one of the detents being movable in a generally radial direction relative to the central longitudinal axis of the torch between an undeflected state and a deflected state. The at least one detent is movable from the undeflected state to the deflected state when the cathode and electrode are telescoped one into the other, and is movable from the deflected state back toward the undeflected state when the cathode and electrode are further telescoped tc, a point where the detents on the cathode and electrode are generally axially aligned. In this position, the at least one detent is engageable with the other detent to interconnect the cathode and electrode and inhibit axial movement of the electrode away from the cathode.

    摘要翻译： 等离子弧焊炬具有阴极和电极，其连接端被配置为在炬的中心纵向轴线上彼此同轴伸缩连接。 连接端部具有相互接合的制动器，其中至少一个棘爪可相对于割炬的中心纵向轴线在非偏转状态和偏转状态之间沿大致径向方向移动。 当阴极和电极一个伸缩到另一个时，至少一个棘爪可以从未偏转状态移动到偏转状态，并且当阴极和电极进一步伸缩时，可以从偏转状态向未偏转状态移动tc， 其中阴极和电极上的棘爪通常轴向对齐。 在该位置，至少一个棘爪可与另一个棘爪接合，以使阴极和电极相互连接，并阻止电极远离阴极的轴向移动。

    Contact start plasma torch
    4.
    发明授权
    Contact start plasma torch 有权
    接触启动等离子体焰炬

    公开(公告)号：US06703581B2

    公开(公告)日：2004-03-09

    申请号：US09794540

    申请日：2001-02-27

    申请人： Joseph P. Jones ,  Roger W. Hewett ,  Kevin D. Horner-Richardson ,  David A. Small

    发明人： Joseph P. Jones ,  Roger W. Hewett ,  Kevin D. Horner-Richardson ,  David A. Small

    IPC分类号： B23K1000

    CPC分类号： H05H1/34 ,  H05H2001/3468 ,  H05H2001/3489

    摘要： A contact start plasma torch and method of starting the torch includes a negatively charged cathode body and a positively charged anode body. A conductive element in the torch is constructed of an electrically conductive material and is free from fixed connection with the cathode body and the anode body. The torch is operable between an idle mode wherein the conductive element provides an electrically conductive path between the cathode body and the anode body and an pilot mode wherein a pilot arc is formed between the conductive element and at least one of the cathode body and the anode body. The pilot arc is blown by working gas flowing through the torch toward an exit orifice of the torch whereby the working gas is exhausted from the torch in the form of an ionized plasma.

    摘要翻译： 接触启动等离子体焰炬和启动割炬的方法包括带负电的阴极体和带正电的阳极体。 割炬中的导电元件由导电材料构成，并且与阴极体和阳极体无固定连接。 所述手电筒可在空转模式之间操作，其中所述导电元件在所述阴极体和所述阳极体之间提供导电路径，以及导电模式，其中在所述导电元件与所述阴极体和所述阳极中的至少一个之间形成引导电弧 身体。 引导电弧通过工作气体流动通过手电筒向火炬的出口喷射，从而工作气体以电离等离子体的形式从割炬中排出。