How to weld Yahu welding, what to do if there is no fox in Yahu welding machine

Forehead. It's about the same as electric welding. Gradually one more thing.

There are many reasons why the argon arc welding machine does not arc, and the common faults and detection and maintenance methods are as follows

1. High frequency does not arc. Fault phenomenon: when argon arc welding, there is no high-frequency discharge, and the arc can be scratched.

It means that there is no load voltage, and the argon arc welding gun is no problem, but it may be a problem with PCB1 and PCB6 boards. There is no high-frequency discharge, it may be that the capacitor on the PCB6 is damaged, and it can be normal if the PCB6 board is replaced.

2. No arc. Fault phenomenon: when argon arc welding, there is high-frequency discharge, there is no argon output and no arc, and there is no no-load voltage.

There is high frequency, no-load voltage, which proves that the argon arc welding gun is no problem, there is no argon protection, argon arc welding will definitely not arc, at this time it is possible that the gas valve is damaged or the PCB1 board does not supply power to the gas valve.

Solution: Use a multimeter to detect the wiring block (XSI), 1, 2 pins and 6 pins on PCB1 CNI06, AC36V, indicating that the solenoid valve is damaged, replace the solenoid valve, if the gun has no voltage, you need to replace the PCB1 board.

3. The argon arc does not arc. Fault phenomenon: manual welding is normal, argon arc welding, no no-load voltage output.

If the manual welding is normal, it means that the main circuit is normal. The argon arc has the following possibilities for no-load voltage output: the welding torch is not working.

Use a multimeter to measure the 1 or 2 pins of the welding torch plug, if the torch is not passed, repair the welding torch switch or replace the welding torch can be normal. If the PCB5 relay does not work, replace the PCB5 board. If PCB5 is detected to be normal, it may be that the control circuit of the PCB1 board is faulty, and the PCB1 board needs to be replaced to be used normally.

No! Argon arc welding takes advantage of the fact that argon is an inert gas, and argon gas shielded welding is used to prevent metal oxidation. It is to pass argon arc protective gas around the arc welding to isolate the air from the welding area and prevent oxidation of the welding area.

According to the different electrodes, TIG welding can be divided into two types: MIG welding and non-MIG welding.

1 The working principle and characteristics of non-melting pole TIG welding.

Non-melting electrode argon arc welding is the arc between the non-melting electrode (usually tungsten electrode) and the workpiece burning, around the welding arc flows through an inert gas (often argon) that does not react with the metal, forming a protective gas hood, so that the tungsten electrode head, arc and molten pool and the metal that has been at high temperature are not in contact with the air, which can prevent oxidation and absorb harmful gases. The result is a dense welded joint with very good mechanical properties.

2 The working principle and characteristics of MIGG welding.

The welding wire is fed through the wire wheel, and the contact tip conducts electricity, which generates an arc between the base metal and the welding wire, melts the welding wire and the base metal, and uses inert gas argon to protect the arc and molten metal for welding. The difference between it and tungsten argon arc welding: one is that the welding wire is used as an electrode, and is continuously melted and filled into the molten pool, and the weld is formed after condensation; The other is shielding gas, with the application of MIGG welding technology, shielding gas has developed from a single argon gas to a variety of gas mixtures for a wide range of applications, such as argon-rich shielding gas of AR 80 CO220.

Usually the former is called MIG and the latter is called MAG. From the perspective of its operation mode, the most widely used at present is semi-automatic melting pole argon arc welding and argon-rich mixed gas shielded welding, followed by automatic melting pole argon arc welding.

It is mainly caused by oxidation of the weld.

The blackening of stainless steel weld belongs to the most secondary weld and is unqualified weld.

Causes: 1. The argon flow rate is too small, and the protective ability becomes weak, resulting in air invading the weld. It is enough to increase the argon flow rate appropriately.

2. The argon gas flow is too large, and the argon gas flow forms a vortex and is rolled into the molten pool air, which not only causes argon waste and increases the welding cost, but also makes the weld seriously oxidized. It is sufficient to reduce the argon flow rate.

3. The diameter of the nozzle of the argon arc welding gun is too small. Resulting in poor weld protection and oxidation. Replace the large diameter nozzle.

4. The arc is too high, and the welding wire is far from the workpiece and the base metal Taiyuan weld is invaded by air. Appropriately reduce the distance between the welding torch, welding wire and the workpiece.

5. The welding environment is windy. TIG welding has poor wind resistance. Just do the wind blocking measures and weld.