How to choose enough inverter AC and DC square wave argon arc welding machine welding aluminum .

Depending on the thickness of your welding, you can choose about 200A below 5mm, about 300A for 5 8mm, and 500A for 8mm or more. Changzhou Jinyang Kaiyuan welding and cutting equipment.

How do you weld aluminum? How to weld AC and DC square wave argon arc welding machine, how to adjust the current:

First of all, the working gear of the AC and DC square wave argon arc welding machine is adjusted to the AC file, only at this time the AC and DC square wave argon arc welding machine can weld aluminum, the current adjustment should be adjusted according to the thickness of the plate and the size of the workpiece, the plate is thinner and the industry is smaller, the current should be slightly smaller, the workpiece is thicker and larger at the same time, and the current will be larger;

Because the melting point of aluminum is very low and the color difference is not large when melting, so pay attention to the welding as long as you see the metal melted and shiny, you can fill the wire, due to the insertion of the new solid metal when filling the wire, it responds to reduce the temperature of the molten pool to avoid burn-through, as you practice more welding skills, the current can also respond and then increase, pay attention to do not touch the tungsten electrode when filling the wire during welding.

First of all, the working gear of the AC and DC square wave argon arc welding machine is adjusted to the AC file, only at this time the AC and DC square wave argon arc welding machine can weld aluminum, the current adjustment should be adjusted according to the thickness of the plate and the size of the workpiece, the plate is thinner and the industry is smaller, the current should be slightly smaller, the workpiece is thicker and larger at the same time, and the current will be larger;

Because the melting point of aluminum is very low and the color difference is not large when melting, so pay attention to the welding as long as you see the metal melted and shiny, you can fill the wire, due to the insertion of the new solid metal when filling the wire, it responds to reduce the temperature of the molten pool to avoid burn-through, as you practice more welding skills, the current can also respond and then increase, pay attention to do not touch the tungsten electrode when filling the wire during welding.

DC, there can be no square waves.

Only AC square wave TIG welding.

You should be talking about inverter, AC, DC, square wave tungsten argon arc welding. This series of welding machines has two modes: smooth DC output electricity and square wave AC output electricity.

Square wave exchange.

There is no DC square wave TIG welding machine, there is an AC square wave TIG welding machine.

Working principle: The arc of argon arc welding adopts the arc starting method of high-voltage breakdown, first between the electrode needle (tungsten needle) and the workpiece, high frequency and high pressure are applied to break down argon gas to make it conductive, and then supply continuous current to ensure the stability of the arc.

The working principle of the argon arc welding machine in the main circuit, auxiliary power supply, driving circuit, protection circuit and other aspects is the same as that of the hand arc welding machine. I will not go into more detail here, but focus on the unique control function and arc starting circuit function of argon arc welding machine.

Operation. 1. The argon arc welding must be operated by a special person.

2. Check whether the equipment and tools are in good condition before work.

3. Check whether the welding power supply, the control system has a grounding wire, and the transmission part is lubricated. The rotation should be normal, and the argon and water sources must be unblocked. If there is any water leakage, it should be repaired immediately.

4. Check whether the welding torch is normal and whether the ground wire is reliable.

5. Check whether the high-frequency arc striking system and welding system are normal, whether the wire and cable joints are reliable, and check whether the adjustment mechanism and wire feeding mechanism are in good condition for automatic wire argon arc welding.

6. Select the polarity according to the material of the workpiece, connect the welding circuit, use DC positive connection for general materials, and reverse connection or AC power supply for aluminum and aluminum alloy.

7. Check whether the welding groove is qualified, there shall be no oil stain and rust on the surface of the groove, and the oil and rust should be removed within 200mm on both sides of the weld.

8. Check the reliability of the fetal tool, and check the preheating equipment and temperature measuring instrument if the weldment needs to be preheated.

9. The argon arc welding operation button should not be far away from the arc, so that it can be closed at any time in the event of a failure.

10. When using high-frequency arc striking, it is necessary to check whether there is leakage.

11. If the equipment fails, the power should be cut off for maintenance, and the operator shall not repair it by himself.

12. It is not allowed to be naked and naked in other parts near the arc, and it is not allowed to smoke or eat near the arc, so as to avoid ozone and smoke inhalation into the body.

13. When grinding thorium tungsten electrode, you must wear masks and gloves, and abide by the operating procedures of the grinder. It is best to use cerium tungsten electrode (the radiation dose is smaller). The grinder must be equipped with an exhaust device.

14. Operators should wear electrostatic dust masks at all times. Minimize the time of high-frequency electrical action during operation. Continuous work shall not exceed 6 hours.

15. The argon arc welding work site must be well ventilated. Ventilation and detoxification equipment should be started during work. When the ventilation device fails, it should stop working.

16. Argon cylinders are not allowed to be smashed, and there must be a bracket for vertical placement, and they are more than 3 meters away from open flames.

17. When argon arc welding is carried out inside the container, a special mask should be worn to reduce the inhalation of harmful smoke. There should be a person outside the container to supervise and cooperate.

18. Thorium tungsten rods should be stored in a lead box to avoid injury due to the radioactive dose exceeding the safety regulations when a large number of thorium tungsten rods are concentrated together.

Can be replaced · The inverter welder is an updated version of the thyristor, and the technology is higher than that of the thyristor. Compared with thyristor welders, inverter welders are more energy-efficient, smaller in size, lighter in weight, and have higher weld quality. However, due to the immaturity of the main components of the domestic inverter welding machine, the performance of the domestic inverter welding machine is not very stable, and the thyristor welding machine still has a large market!

At present, the largest manufacturers of inverter welding machines in China are Tangshan Panasonic, Shandong Aotai, and Beijing Times. The performance of small welding machines below 250 at Shenzhen Christie's is very good!

The difference between thyristor and inverter TIG welding is used.

1. The thyristor rectifier welding machine is to rectify the 50Hz alternating current into direct current output, and change the output size by changing the conduction angle of the thyristor, and the output waveform is not smooth, so the welding effect is not very good, and the arc striking and some other control functions are slightly worse.

The inverter argon arc welding machine is to rectify the alternating current, after the IGBT inverter, and then through the intermediate frequency transformer to step down, after the secondary rectification, the output waveform is good, and the on-time of the IGBT inverter is controlled by pulse width modulation to change the size of the output. Arc striking and thrust currents are easy to control.

2. The thyristor rectifier welding machine is large in size, relatively bulky, and inconvenient to handle and move; The inverter type argon arc welding machine is small in size, light in weight and easy to handle due to the inverter frequency as high as 20-30kHz.

3. The inverter welding machine saves about 30% of electricity compared with the inverter argon arc welding machine.

4. The control and main circuit of the inverter argon arc welding machine are relatively simple, with high reliability, few fault points and easy maintenance.

Weakly asked, I think welding non-ferrous metals 315 is not small.

1. DC is rectified by means of rectification, so that the output voltage and current are basically in the same direction, and are almost constant during welding.

2. Inverter AC is to change the AC power frequency into DC, and then change it into high-frequency AC through the switching element. In the case of secondary inverter, the high-frequency AC is rectified into DC, and then the switching element is changed to the AC of the required frequency. It is characterized by periodic changes in the voltage and current of the output.

There are positive and negative, and they will cross the zero point.

3. Pulse inverter AC is based on inverter AC, adding pulse function, so that pulses are added to each alternating waveform, the number of pulses in each waveform can be adjusted, and each pulse can adjust the peak current and base current. It is a method of welding by providing a pulse current that changes according to a certain law to the arc by the welding power supply.

The main advantages are: 1. It is easy to control the amount of welding heat input, which can not only weld through but also will not weld strings, especially in the thin plate welding.

2. It can realize single-sided welding and double-sided forming. It is suitable for all TIG welding occasions.

An argon arc welding machine with inverter output DC and pulse. This welding machine is mainly used to weld thin plates.

Inverter: DC to AC is used to reduce the weight of the welding machine and save costs.

DC pulse: The output is direct current, but the magnitude of the current changes with time, and the direction does not change. The aim is to reduce heat input.

The difference between the inverter pulse DC TIG welding machine and the thyristor DC TIG welding machine is that the working mode is different;

The inverter pulse DC TIG welding machine is the latest product, and the thyristor DC TIG welding machine is a little behind;

The inverter type claims to save many energy, but it is just propaganda;

It saves copper and iron.

The inverter DC pulse tungsten argon arc welding machine adopts IGBT power switching device driven by phase-shifting soft switch, and inverts the power frequency of 50Hz into a high frequency of 20kHz through advanced PWM pulse width modulation technology, and then carries out step-down rectification to output a high-power DC power supply for welding.