RU2011140638A

RU2011140638A - METHOD OF PLASMA WELDING BY FLOATING ELECTRODE AND PLASMOTRON FOR ITS IMPLEMENTATION

Info

Publication number: RU2011140638A
Application number: RU2011140638/02A
Authority: RU
Inventors: Юрий Дмитриевич Щицын; Владислав Юрьевич Щицын
Original assignee: Открытое акционерное общество "Плазмек"
Priority date: 2011-10-06
Filing date: 2011-10-06
Publication date: 2013-04-20
Also published as: RU2495735C2

Abstract

1. Способ плазменной сварки плавящимся электродом, по которому сварку осуществляют при помощи плазмотрона, содержащего кольцевой неплавящийся электрод для формирования сжатой дуги с этого электрода на изделие, пусковой неплавящийся электрод, установленный внутри кольцевого электрода по его оси и выполненный с осевым отверстием, в котором с возможностью перемещения расположен плавящийся электрод, так что первоначально высоковольтным высокочастотным разрядом возбуждают дугу с пускового неплавящегося электрода на свариваемое изделие, при этом упомянутая сжатая дуга возбуждается самопроизвольно, после чего через упомянутое осевое отверстие в пусковом неплавящимся электроде в зону сварки подают плавящийся электрод, с которого в результате этого самопроизвольно возбуждается дуга на свариваемое изделие, а упомянутая дуга с пускового неплавящегося электрода самопроизвольно гаснет.2. Плазмотрон, содержащий корпус, кольцевой неплавящийся электрод, установленный на корпусе и предназначенный для формирования сжатой дуги с этого электрода на свариваемое изделие, пусковой неплавящийся электрод, установленный внутри кольцевого неплавящегося электрода, плавящийся электрод, расположенный внутри кольцевого неплавящегося электрода по его оси с возможностью осевого перемещения, а также выполненные в корпусе каналы для прохождения охлаждающего агента и подачи плазмообразующего газа, отличающийся тем, что пусковой неплавящийся электрод установлен по оси кольцевого неплавящегося электрода и выполнен с осевым отверстием, в котором с возможностью перемещения расположен плавящийся электрод.1. A method of plasma welding with a consumable electrode, in which welding is carried out using a plasma torch containing an annular non-consumable electrode to form a compressed arc from this electrode onto a product, a starting non-consumable electrode mounted inside the ring electrode along its axis and made with an axial hole in which with the possibility of movement, a melting electrode is located, so that initially with a high-voltage high-frequency discharge, an arc is excited from the starting non-consumable electrode to the item to be welded, in this case, the said compressed arc is excited spontaneously, after which, through the said axial hole in the starting non-consumable electrode, a melting electrode is fed into the welding zone, from which as a result the arc is spontaneously excited on the welded product, and the said arc from the starting non-consumable electrode spontaneously extinguishes. 2. A plasma torch containing a housing, a ring non-consumable electrode mounted on the body and designed to form a compressed arc from this electrode onto the item to be welded, a starting non-consumable electrode installed inside the ring non-consumable electrode, a consumable electrode located inside the ring non-consumable electrode along its axis with the possibility of axial movement as well as channels made in the housing for passing a cooling agent and supplying a plasma-forming gas, characterized in that the starting non-melting iysya electrode is mounted on the annular consumable electrode axis and formed with an axial hole, wherein the movable electrode is consumable.

Claims

1. A method of plasma welding with a consumable electrode, in which welding is carried out using a plasma torch containing an annular non-consumable electrode to form a compressed arc from this electrode onto a product, a starting non-consumable electrode mounted inside the ring electrode along its axis and made with an axial hole in which with the possibility of movement, a melting electrode is located, so that initially with a high-voltage high-frequency discharge, an arc is excited from the starting non-consumable electrode to the item being welded, in this case, the said compressed arc is excited spontaneously, after which, through the said axial hole in the starting non-consumable electrode, a melting electrode is fed into the welding zone, from which as a result the arc is spontaneously excited on the item being welded, and the said arc from the starting non-consumable electrode spontaneously extinguishes.

2. A plasma torch comprising a housing, a ring non-consumable electrode mounted on the body and designed to form a compressed arc from this electrode onto the item to be welded, a starting non-consumable electrode installed inside the ring non-consumable electrode, a consumable electrode located inside the ring non-consumable electrode along its axis with the possibility of axial movement, as well as channels made in the housing for passing a cooling agent and supplying a plasma-forming gas, characterized in that the starting non-melting The scrambled electrode is installed along the axis of the ring non-consumable electrode and is made with an axial hole in which the melting electrode is located with the possibility of movement.