SU854639A1 - Method of welding by meltable electrode with short circuits of arc gap - Google Patents
Method of welding by meltable electrode with short circuits of arc gap Download PDFInfo
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- SU854639A1 SU854639A1 SU782648085A SU2648085A SU854639A1 SU 854639 A1 SU854639 A1 SU 854639A1 SU 782648085 A SU782648085 A SU 782648085A SU 2648085 A SU2648085 A SU 2648085A SU 854639 A1 SU854639 A1 SU 854639A1
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- USSR - Soviet Union
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- welding
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- arc
- short circuits
- arc gap
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- Arc Welding In General (AREA)
Description
менени сварки в среде защитных газов с короткими замыкани ми при положени х, отличных от нижнего.changes in short-circuit shielding gas welding at positions other than the bottom.
Указанна цель достигаетс тем, что в способе сварки -плав щимс i электродом посто нным током с короткими замыкани ми дугового промежутка, при котором производ т уменьшение сварочного тока в период короткого замыкани с последующим его увеличением , уменьшение сварочного тока производ т на врем образовани устойчивой перемычки между сварочной ванной и электродом .- В момент окончани короткого замьпсани снова производ т резкое уменьшение сварочного тока.This goal is achieved by the fact that, in the welding method, a floating current by a direct current electrode with short circuits of the arc gap, in which the welding current decreases during a short circuit and then increases, the welding current is reduced during the formation of a stable jumper between the weld pool and the electrode. At the moment of the end of the short latch, a sharp decrease in the welding current is again made.
На чертеже показана крива изменени тока короткого замьпсани 1 и напр жени дуги 2 при сварке предлагаемым способом.The drawing shows the curve of the change in the current of the short clamp 1 and the voltage of the arc 2 when welding by the proposed method.
Предлагаемый способ сварки на режимах с периодическими короткими замыка}П1 ми дугового промежутка осуществл ют следующим образом.The proposed method of welding on modes with periodic short circuits} P1 m arc gap is carried out as follows.
В момент касани капли поверхности сварочной ванны производ т резкое уменьшение сварочного тока на врем обраювани устойчивости перемьгаки расплавленного металла между концом электрода и сварочной ванной, затем осуществл ют резкое увеличение тока и в момент возбуждени дуги уменьшают сварочный ток. Такой цикл изменени тока в процессе короткого замыкани каплей дугового промежутка имеет последстви : предотвращаетс газодинамический удар, вызванный электромагнитными силами в период формировани перем №пси между каплей электродного металла и ванной, всплеск тока, проход щего через сформировавшуюс перемьгжу жидкого металла, сообщает капле дополнительный импульс кинетической энергии, направленной в сторону сварочной ванны. Поскольку возбуждение дуги и разрушение перемычки происхо , малом токе, существенно снижаетс интенсивность газо- и гидродинамического ударов в момент возбуждени дуги.At the moment of contact of the drop of the weld pool surface, a sharp decrease in the welding current occurs at the time of formation of the stability of the molten metal rebound between the end of the electrode and the weld pool, then a sharp increase in the current is carried out and at the time of initiation of the arc, the welding current is reduced. Such a cycle of current change during the shorting of an arc gap by a drop has the following effect: the gas-dynamic shock caused by electromagnetic forces during the formation of the pump No Psi between the electrode metal drop and the bath is prevented, the surge of current passing through the molten metal formed by the crush, the additional kinetic impulse informs the drop energy directed towards the weld pool. Since the initiation of the arc and the destruction of the jumper occurred at a low current, the intensity of gas and hydrodynamic shocks at the moment of initiation of the arc decreases significantly.
Например, при сварке в среде COj проволокой ф 1,2 мм на токе 220 А при напр женки дуги 24 В в момент касани капли сварочной ванны уменьшают величину тока до 60-80 А на 2-3 м с, а затем резко увелшшвают ток до 300-320 А. В момент возбуждени дуги уменьшают величину тока до 80-100 А. Сигналом на уменьшение тока служит изменение 1Ш1р жеш на дуге в момент начала и окончани короткого замьпсани . Благодар такому изменению тока в процессе короткого замыкани исключаетс разбрызгивание и осуществл етс направленный перенос электродного металла в сварочную вашгу, снижаетс разбрызгивание при возбуждении дуги.For example, when welding in COj medium with a wire of 1.2 mm at a current of 220 A, when the arc voltage of 24 V at the moment of contacting a drop of the weld pool, decreases the current to 60-80 A by 2-3 m s, and then sharply increases the current to 300-320 A. At the time of initiation of the arc, the amount of current is reduced to 80-100 A. A signal to decrease the current is a change in 1Sh1 arc on the arc at the time of the beginning and end of the short latch. Due to such a change in the current during the short circuit process, spattering is eliminated and directional transfer of the electrode metal to the welding wire takes place, and spattering during the initiation of the arc is reduced.
Потери металла на угар и разбрызгивзние не превышают 3-5% при сварке в любых пространственных положени х, в то врем как при сварке известным способом потери металла на разбрызгивание 12-15%.Loss of metal for waste and spraying does not exceed 3-5% when welding in any spatial positions, while when welding in a known manner, the loss of metal for spraying is 12-15%.
При сварке предлагаемым способом необходимость в трудоемкой зачистке изделий от приварившихс брызг резко С1шжаетс или исключаетс сЬвсем.When welding with the proposed method, the need for time-consuming cleaning of the products from the welded spatter is abruptly reduced or eliminated.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782648085A SU854639A1 (en) | 1978-07-24 | 1978-07-24 | Method of welding by meltable electrode with short circuits of arc gap |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782648085A SU854639A1 (en) | 1978-07-24 | 1978-07-24 | Method of welding by meltable electrode with short circuits of arc gap |
Publications (1)
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SU854639A1 true SU854639A1 (en) | 1981-08-15 |
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Application Number | Title | Priority Date | Filing Date |
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SU782648085A SU854639A1 (en) | 1978-07-24 | 1978-07-24 | Method of welding by meltable electrode with short circuits of arc gap |
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SU (1) | SU854639A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4954691A (en) * | 1986-12-10 | 1990-09-04 | The Lincoln Electric Company | Method and device for controlling a short circuiting type welding system |
US5001326A (en) * | 1986-12-11 | 1991-03-19 | The Lincoln Electric Company | Apparatus and method of controlling a welding cycle |
-
1978
- 1978-07-24 SU SU782648085A patent/SU854639A1/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4954691A (en) * | 1986-12-10 | 1990-09-04 | The Lincoln Electric Company | Method and device for controlling a short circuiting type welding system |
US5001326A (en) * | 1986-12-11 | 1991-03-19 | The Lincoln Electric Company | Apparatus and method of controlling a welding cycle |
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