The Panasonic 350 welding gun usually refers to a welding equipment produced by Panasonic, which may be used for various industrial welding applications. This type of welding gun generally has high efficiency, stability, and good welding quality, and is suitable for production lines in industries such as automotive, electronics, and home appliances.

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Pulse MIG welding is a MIG welding method that uses pulsed current instead of the usual pulsating direct current.
Due to the use of pulsed current, the arc of pulsed MIG welding is pulsed, compared to conventional continuous current (pulsating DC) welding:
1. The welding parameter adjustment range is wider;
If the average current is less than the lower critical current I0 of the injection transition, as long as the pulse peak current is greater than I0, the injection transition can still be obtained.
2. Convenient and precise control of arc energy;
Not only can the pulse or base current size be adjusted, but its duration can also be adjusted in units of 10-2 seconds.
Excellent thin plate and all position, bottom welding ability.
The molten pool only melts within the pulse current time, and cooling crystallization can be obtained within the base current time. Compared with continuous current welding, the average current (heat input to the weld seam) is smaller under the same penetration depth

1. Gravity: At the flat welding position, the direction of gravity is the same as the direction of droplet transition, promoting the transition; Inverted welding position, obstructing droplet transition
2. Surface tension: It is the main force that maintains the droplet on the end of the welding wire. The finer the welding wire, the easier it is for the droplet to transition.
Electromagnetic force: The force generated by the magnetic field of a conductor itself is called electromagnetic force, and its axial component always expands from a small cross-section to a large cross-section. In melting electrode arc welding, the cross-section of the conductor changes and the direction of electromagnetic force also changes when the current passes through the wire droplet electrode spot. At the same time, the current density at the spot is very high, which will cause strong evaporation of the metal and also generate a significant reaction force on the surface of the molten metal droplet. The influence of electromagnetic force on droplet transition is determined by the arc shape.
4. Plasma flow force: Under the contraction effect of electromagnetic force, the fluid static pressure generated by the arc plasma in the direction of the arc axis is inversely proportional to the cross-sectional area of the arc column, gradually decreasing from the end of the welding wire to the surface of the molten pool. It is a favorable factor for promoting droplet transition.
5. Spot pressure
3.2 Characteristics of droplet transfer in MIG welding
During MIG welding and MAG welding, droplet transfer mainly adopts short-circuit transfer and jet transfer. Among them, short-circuit welding is used for high-speed welding of thin plates and all position welding, while jet transfer is used for horizontal docking and fillet welding of medium and thick plates.
When MIG welding, DC reverse connection is basically used. Because during reverse welding, fine jet transition can be achieved, while during forward welding, positive ions collide with the droplet, generating significant spot pressure that hinders the droplet transition, resulting in irregular droplet transitions during forward welding. MIG welding is not suitable for alternating current because the melting of the welding wire is not equal every half cycle.
When using MIG welding to weld aluminum and aluminum alloys, due to the easy oxidation of aluminum, in order to ensure the protective effect, the arc length during welding cannot be too long. Therefore, we cannot use the jet transition method with high current and long arc length. If the selected current is greater than the critical current and the arc length is controlled between jet transition and short-circuit transition, sub jet transition will be formed.