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    • 6. 发明授权
    • Dual mode plasma arc torch
    • 双模等离子弧焊炬
    • US07202440B2
    • 2007-04-10
    • US11183693
    • 2005-07-18
    • Roger W. HewettKevin D. Horner-RichardsonJoseph P. JonesShiyu ChenFred A. Rogers
    • Roger W. HewettKevin D. Horner-RichardsonJoseph P. JonesShiyu ChenFred A. Rogers
    • B23K10/00
    • B23K9/10H05H1/34H05H2001/3489
    • A dual mode plasma arc torch is provided that preferably comprises a start cartridge disposed between an electrode and a tip. In one form, the start cartridge comprises an initiator that is in electrical contact with the electrode and that is resiliently biased into contact with the tip, such that when the plasma arc torch is in a contact start mode, the initiator is movable against the resilient bias to separate from the tip and establish a pilot arc between the initiator and the tip. Further, when the plasma arc torch is in a high frequency start mode, the start cartridge spaces the tip from the electrode such that a pilot arc is established between the electrode and the tip. In other forms, a contact start torch is provided that is operable under high frequency, and conversely, a high frequency start torch is provided that is operable under low voltage.
    • 提供了一种双模式等离子弧焊炬,其优选地包括设置在电极和尖端之间的启动盒。 在一种形式中,启动盒包括与电极电接触并且被弹性地偏置成与尖端接触的起动器,使得当等离子体电弧焊炬处于接触启动模式时,起动器可抵靠弹性 偏压从尖端分离并在引发器和尖端之间建立引导电弧。 此外,当等离子弧焊炬处于高频启动模式时,起动盒将电极的尖端与电极隔开,使得在电极和尖端之间建立引导电弧。 在其他形式中,提供可在高频下操作的接触启动手电筒,相反地,提供可在低电压下操作的高频启动手电筒。