Second, how to adjust the welding current and voltage?

The size of the welding current mainly depends on the welding form and speed of the wire feeding, the faster the wire feeding, the greater the welding current. The arc voltage needs to use the formula when the short circuit transitions: U i (L is the current symbol) 16 plus or minus 2 (volts) to calculate, in this case, the welding current is generally below 200A; When the current is more than 200A, the arc voltage is used by the formula:

u i 20 plus or minus 2 (volts) is a fine-grained transition state at this time. Specific examples: the arc voltage of the welding current at 70 120A is adjusted at 18 in flat welding, 18 19V in vertical welding and vertical welding, the welding cable is lengthened by ten meters, and the cable voltage drop is about 1V when the current is equal to 100A.

If the voltage is small and the current is large, then the welding wire can not reach the complete melting point after it comes out, it will make a crackling sound, at the same time, you will feel that the operation on the hand is difficult to control, there is a thrust in action, on the contrary, if the current is small and the voltage is large, it will cause the welding wire to melt too fast, and when it is not fully integrated with the weldment, the welding wire has melted, and at this time it will make a popping sound, if you want to adjust to the ideal position, listening to the sound is the easiest way, no matter how your current and voltage are matched, As long as the sound is crisp and continuous, it can basically meet the requirements of welding.

Attention should be paid to debugging welding parameters:

First, turn down the wire feeding speed. Then adjust the welding voltage, and the welding current should be controlled according to the thickness of the welding base metal. The wire feeding speed is adjusted to the right (the arc can dissolve the wire, and the dissolution is very comfortable).

Listen to the sound and watch the splash. If it dissolves very comfortably, the sound is very smooth, there will be no ping-pong sound, and there will be less splashing.

In the case of ensuring the penetration of the weld (here is not the meaning of welding), try to choose small current welding, because when the current is too large, it is easy to cause the molten pool to tumble, not only the spatter is large, but the forming is also very poor.

Welding speed: It has a significant impact on the quality of the inside and outside of the weld. Too fast welding speed will cause poor gas protection, porosity and other defects, and at the same time, the cooling rate of the weld will be increased accordingly, thus reducing the plasticity of the weld metal.

When the welding speed is too slow, the weld pool becomes larger and the weld becomes wider, which is easy to cause the weld metal structure to be coarse or burn through due to overheating.

Nozzle-to-workpiece angle: When the nozzle is perpendicular to the workpiece, the spatter will be large and the arc will be unstable. In order to avoid this situation, the nozzle can be tilted back 10-15 degrees (different welding positions, different welding gun angles) to ensure that the weld is well formed and the welding process is stable.

Shipping method:1Straight line method, straight line reciprocating method. (suitable for small and narrow welds).

2.Zigzag (suitable for wide welds), operation points: pause slightly on both sides of the weld, and overdo it quickly in the middle.

3.Crescent-shaped strip method (same as zigzag).

Summary. Second, the current and voltage adjustment methods of welding are as follows: under the condition of a certain current, the voltage and wire feeding speed should be reversed;

Second, the current and voltage adjustment methods of welding are as follows: under the condition of a certain current, the voltage and wire feeding speed should be reversed;

In welding, when the welding current is constant, the faster the wire feeding speed, the smaller the welding depth; The current is large, the voltage is small, and the top wire will be raised; When the current increases, the penetration depth increases, but the width will also increase.

The first step is to adjust the current knob to the minimum, adjust the voltage knob to the maximum, test welding, do not move the voltage knob at this time, gradually increase the current, and stop it until it can be welded normally; The second step, in turn, is to adjust the current knob to the maximum first, and then adjust the voltage knob to the minimum, test welding, do not move the current knob, gradually increase the voltage, until it can be welded normally and stop; I believe that after such debugging, you should already feel the effect of current and voltage. The third step is to minimize the current and voltage knobs, and gradually increase the voltage and current (you need to adjust it repeatedly in the process) until you find the match that you think is the best weld formed, the softest sound, and you can control it yourself. At this point, congratulations, you've found a way.

You can adjust the current and voltage corresponding to various welding positions of vertical welding, flat welding, horizontal welding, and vertical welding.

Adjust the current or voltage first.

Current. The first step is to adjust the current knob to the minimum, adjust the voltage knob to the maximum, test welding, do not move the voltage knob at this time, gradually increase the current, and stop it until it can be welded normally; The second step, in turn, is to adjust the current knob to the maximum first, and then adjust the voltage knob to the minimum, test welding, do not move the current knob, gradually increase the voltage, until it can be welded normally and stop; I believe that after such debugging, you should already feel the effect of current and voltage. The third step is to minimize the current and voltage knobs, and gradually increase the voltage and current (you need to adjust it repeatedly in the process) until you find the match that you think is the best weld formed, the softest sound, and you can control it yourself.

At this point, congratulations, you've found a way. You can adjust the current and voltage corresponding to various welding positions of vertical welding, flat welding, horizontal welding, and vertical welding.

It is still good to use the contact noop.

What is the reason for the plugging of the contact nozzle.

There may be reasons such as backburning caused by mismatch of current and voltage, improper gas flow or blockage of the gas outlet, and the contact tip being worn by the welding wire or splashing into and out of the wire.

Okay, please give it a thumbs up.

The adjustment method of the current and voltage of the second welding machine is as follows:According to the relationship between the stability of the welding process and the matching of the specification, under the premise of ensuring that the peripheral system (wire feeding, conductivity) is good:

1) When i<200a, u=(14+2) When I >200A (especially with extended wire), the voltage is slightly higher U=(16+

The second protection welding machine is the abbreviation, the full name is carbon dioxide protection welding machine.

The second welding machine is composed of transformers, control circuit boards, switches, frames, etc., as well as auxiliary equipment such as carbon dioxide cylinders, wire racks, and wire feeders. **The transformer of the second welding machine, due to the large welding current, generally has hundreds of amperes, so its wire is very thick, most of them are copper coils, and there are also aluminum coils.

The adjustment method of the voltage and current of the second welding is as follows: according to the relationship between the stability of the welding process and the matching of the specification, under the premise of ensuring that the peripheral system (wire feeding and conductivity) is good: when I < 200A, U=(14+>200A (especially with extended wire), the voltage is slightly higher U=(16+

The second welding process is suitable for all kinds of large-scale steel structure engineering welding of low carbon steel and low alloy high-strength steel, with high welding productivity, good crack resistance, small welding deformation, large range of adaptable deformation, and can be welded with thin plates and medium and heavy plates.

The current and voltage adjustment of the second welding is as follows:

First of all, the hand should be steady, that is, the hand must have the strength to control the welding gun. Breathe carefully, the chest expands and contracts when breathing, which will drive the arm to move, and it is also unstable during welding. To practice breathing, keep your fingers in a position and breathe carefully, and use your will to control your hands not to move or your fingers to walk in a straight line.

Welding materials: 1. CO2 gas purity requirements; The water content of the friction does not exceed; The carbon content does not exceed.

2. Copper plating on the surface of the welding wire is not allowed to have rust spots.

1. Before welding, the joint cleaning requires that the burrs, oil, rust, and oxide scale that affect the quality of the weld within 30mm on both sides of the groove must be cleaned.

2. When the construction environment temperature is lower than zero or the carbon equivalent of the steel is greater than that, and the structural rigidity is too large, and the object is thicker, preheating measures should be used before welding, the preheating temperature is 80 100, and the preheating range is 5 times the thickness of the plate, but not less than 100mm.

3. When the thickness of the workpiece is greater than 6mm, in order to ensure the welding penetration strength, the butt edge of the plate should be cut V-shaped or X-shaped, the groove angle is 60°, the blunt edge p is 0 1mm, and the assembly clearance B is 0 1mm; When the thickness difference is 4mm, the butt edge of the thicker plate should be skewed.

Hello, the current and voltage adjustment method of the second welding is as follows: when the welding current is constant, the faster the wire feeding speed, the smaller the welding depth, and the larger the welding voltage, the smaller the welding depth; In the case of a certain current, the voltage and wire feeding speed should be adjusted in the opposite direction. If the wire is ; The voltage is 18V, the wire feeding speed is 60cm min, and the general adjustment machine only moves the voltage.

According to the relationship between the stability of the welding process and the specifications, on the premise of ensuring that the peripheral system (wire feeding, conduction) is good: 1. When I < 200A, U I) When I > 200A (especially when using extension cables), the voltage is slightly higher U I) 2V.

If it is multi-functional, adjust the function Sakuramori Ant to the second guarantee (some are written remote control near control, should be remote control) The following says the current, giving you a few current-voltage ratios, 300a34v, 250a30v, 200a25v, 150a22v, 100a20vThe voltage may vary by 2V depending on the welding machine, and the wire extends out of the contact tip at 10 to 15 mm. The wire feed speed is the current.

The gas flow rate is between 15 and 25 liters, depending on the current size. The following is said that the function on the panel of the welding machine may not be there, and it will be forgotten if it is not.

1. The diameter of the welding wire should be consistent with the use, 2. The solid core should be consistent with the 3. Gas detection welding, adjust to the welding 4 arc closing, you are a beginner and no one will teach you to adjust to none, in fact, small current is not used, some welding machines write long welding and short welding, or 2t4t, which means the same.

The method of adjusting the voltage and current of the second welding machine:

According to the thickness of the workpiece, the position of the weld, the diameter of the welding wire, the gas flow, and the welding current are selected. Test welding on the test board, according to the selected welding current, carefully adjust the welding voltage and arc thrust spring age, the best welding voltage is generally between 1 2V.

According to the forming of the weld on the test board, the welding current, welding voltage and gas flow are appropriately adjusted to achieve the best welding specifications. In the formal welding process on the workpiece, attention should be paid to the welding circuit, the voltage drop caused by the contact resistance, and the welding voltage should be adjusted (fine-tuned) in time to ensure the stability of the welding process (for the case of relatively large workpieces).