Plasma arc torch
    1.
    发明授权
    Plasma arc torch 失效
    等离子弧焊机

    公开(公告)号:US3849584A

    公开(公告)日:1974-11-19

    申请号:US40932973

    申请日:1973-10-24

    摘要: A plasma arc remelting furnace system with improved components including mechanisms for independently vertically feeding and oscillating the metal blank through the top of the furnace. Multiple plasma arc torches (plasmatrons) are installed in a sealed chamber and adjustable operators enable angular disposition of individual torches. The torches have improved torch nozzles with heat sink construction enabling operation at higher temperatures, better stabilized plasma arcs and longer torch life. The system can utilize ingot molds of various cross section shapes, i.e., round, square, rectangular and polygonal and, depending upon mold shape, the number of torches can differ. Operating circuits are provided for use with a plurality of different numbers (up to eight) of torches, either with direct current or alternating current power sources, and possible variations of circuits will enable using a larger number of torches.

    Method for the plasma-ac remelting of a consumable metal bar in a controlled atmosphere
    2.
    发明授权
    Method for the plasma-ac remelting of a consumable metal bar in a controlled atmosphere 失效
    在控制的大气中消耗金属棒的等离子体交替重新排列的方法

    公开(公告)号:US3723630A

    公开(公告)日:1973-03-27

    申请号:US3723630D

    申请日:1971-06-28

    CPC分类号: H05H1/42 F27D11/08 H05B7/07

    摘要: A method for plasma-arc remelting of a material under a controlled atmosphere consists in making the material to be remelted in the form of a consumable hollow electrode-bar and electrically melting down the hollow electrode-bar so formed, in a cooled mold before finally stripping the remelted ingot off the mold. The method also includes generating a low temperature plasma at a tip of the consumable electrode which is connected to a power source, by supplying plasma-generating gas into an arcregion, through the hollow of the consumable electrode bar. Stabilizing the plasma-arc during operation without giving rise to transient arc plasma is expediently achieved by feeding preselected amounts of flux into the arc-region, thereby producing an ingot free from flaws and impurities.

    摘要翻译: 一种在受控气氛下等离子体电弧重熔的方法,是将材料以可消耗的中空电极棒的形式重新熔化,然后在冷却的模具中将如此形成的中空电极棒电解熔化 将重熔锭从模具上取出。 该方法还包括通过可消耗电极棒的中空部分将等离子体产生气体供应到电弧区域中,在消耗电极的尖端产生连接到电源的低温等离子体。 通过将预选量的助熔剂供给到电弧区域中,有利于在运行期间稳定等离子体电弧而不产生瞬时电弧等离子体,从而产生没有缺陷和杂质的锭。

    Plasma-arc furnace
    5.
    发明授权
    Plasma-arc furnace 失效
    等离子弧炉

    公开(公告)号:US3777044A

    公开(公告)日:1973-12-04

    申请号:US3777044D

    申请日:1971-10-01

    CPC分类号: F27D3/18

    摘要: A plasma-arc furnace for remelting of sheet-waste material of high reactivity metals and their alloys has a furnace chamber containing a mould, plasmatrons mounted on a roof of the chamber, and a charging device for feeding sheet-waste material into a melting zone. The charging device has a hopper arranged to contain the sheet-waste material, a water-cooled base plate, guide troughs along which the sheet-waste material is fed, and controlling means to control the feed of the sheet-waste into the melting zone. The furnace expediently employs a stripping and conveying gear to deliver remelted sheet-waste material in any desired form such as a bar or a slab.

    摘要翻译: 用于重熔高反应性金属及其合金的片材废料的等离子体电弧炉具有包含模具的炉室,安装在室的顶部上的等离子体,以及用于将片材废料送入熔融区域的充电装置 。 充电装置具有容纳片材废料的料斗,水冷基板,供给片材废料的导向槽,以及控制装置,用于控制片材废料进入熔融区域 。 炉子方便地采用剥离和输送装置以任何期望的形式(例如酒吧或板坯)输送重熔的废料。