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Ignition device for exothermic welding, mold for exothermic welding for the ignition device, and apparatus for exothermic welding comprising such a mold and such an ignition device
Ignition device for exothermic welding, mold for exothermic welding for the ignition device, and apparatus for exothermic welding comprising such a mold and such an ignition device
The present invention relates to an ignition device for exothermic welding comprising an electrically conductive metal bushing (1) that can house a pellet of a first welding material (4) in electrical contact with the inner wall of an inner chamber (1c) of the bushing (1), provided with an electrically insulating cap (2) and a bottom base (1b) with an opening (1d) through which the first welding material (4) falls in an incandescent state onto a second welding material (4a) arranged in a weld mold (7) when an exothermic reaction has been triggered in the first welding material (4); an electrode (5) that goes through the cap (2) of the metal bushing (1) and comprises a top contact (5a) connectable to a power output (24) of a voltage generator and a bottom contact in the form of a filament (5b) that can be in electrical contact with the pellet of the first welding material (4), the filament (5b) being made of a material having a melting temperature greater than the ignition temperature of the welding material (4); as well as a contact-assuring element (3) which is guided into the inner chamber (1c) between the bottom base (1b) and the pellet of the first welding material (4).
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机译:用于放热焊接的点火装置技术领域本发明涉及一种用于放热焊接的点火装置,其包括导电金属衬套( 1 B>),该金属衬套可以容纳电接触的第一焊接材料( 4 B>)的小球。衬套( 1 B>)的内腔( 1 B> c I>)的内壁设有电绝缘帽( 2 B>)和底部底座( 1 B> b I>)具有开口( 1 B> d I>)第一焊接材料( 4 B>)以白炽状态掉落到布置在焊接模具(< B> 7 B>)时,在第一焊接材料( 4 B>)中已引发放热反应;电极( 5 B>)穿过金属套管( 1 B>)的盖子( 2 B>)并包括顶部触点( 5 B> a I>)可连接到电压发生器的功率输出( 24 B>)和细丝形式的底部触点( 5 B> b I>)可以与第一焊接材料( 4 B>)的焊丝,细丝( 5 B> b I>)由熔化温度高于焊接材料的着火温度( 4 B>)的材料制成;以及一个接触保证元件( 3 B>),该接触保证元件被引导到底部底部( > 1 B> b I>)和第一种焊接材料的颗粒( 4 B>)。
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