What should I pay attention to when welding galvanized sheet spot welding machine?

Hello, you need to pay attention to these things when welding with galvanized sheet spot welding machine:

1.There should be no oil stains on the surface of the welded product.

2.The material of the welding joint should be made of alumina copper.

3.When the welding head sticks to the product, the mold should be repaired in time and cannot be used continuously.

4.The spot welding machine needs to be equipped with a cooling water tank to cool the welding head and the welding effect is perfect.

Most of the common sense operation skills and precautions of galvanized sheet spot welding machine are seen and forgotten, but production safety is above all else, so we must pay more attention to abide by safety production standards. Let's talk about the correct use of the galvanized sheet spot welding machine and the precautions after welding.

1. Welding precautions 1. Adjust the position of the electrode rod before welding, and the electrode should be able to press the weldment; 2. Turn on the cooling water first, and then turn on the power supply, you can prepare for welding, and the weldment should be placed between the electrodes; 3. Before welding the galvanized sheet spot welding machine, the weldment should be cleaned, and the welding place should not be dirty, oxide scale, etc., otherwise it will affect the welding quality and service life of the welding machine;

4. The parameters of welding, such as welding current, should be determined according to the situation of the weldment, the higher the metal conductivity, the greater the welding current density, so the welding time of the welding machine should be shortened. This aspect also needs our attention and cannot be taken lightly.

2. Precautions after welding 1. When the welding machine stops working, the power supply and gas source should be cut off first, and finally the water source should be turned off to remove debris and welding slag splash. 2. If the galvanized sheet spot welding machine is out of service for a long time, the active parts that are not painted should be coated with anti-rust oil fingers. Heating is powered on for 30min per month.

The replacement of the thyristor should also be preheated for 30min, and the preheating of the normal operation control box should not be less than 5min.

It should be noted that not all electrode materials should meet the above requirements well, and the appropriate electrode materials should be selected according to their own welding process and welding material characteristics.

For example, welding superalloys requires the use of electrode materials with high hardness at high temperatures, but their electrical and thermal conductivity are often poor, and attention must be paid to strengthening cooling during welding.

When welding aluminum and aluminum alloy metals with high conductivity, it is necessary to choose electrode materials with low conductivity, such as copper, cadmium copper, etc., but they are high in hardness at high temperature and easy to adhere to weldment metal products. In addition, the shape of the electrode surface is also very important, and the electrode with different end faces should be designed according to different materials.

Adjust the air pressure first, adjust it to the left and right, and then adjust the current again, the primary current is not too large, the time is about 100 milliseconds to burn the galvanized layer, and then the secondary current is adjusted to be shorter, and the electrode head must be alumina copper electrode or beryllium cobalt copper electrode with higher hardness.

Hello, adjusting the welding parameters of the spot welding machine is mainly to see the thickness and shape of the welding workpiece, but also to know what kind of welding effect you want, and then you can adjust the welding parameters.

Of course, it is best to use argon arc welding. Chain God Chain.

Magnesium can react to carbon dioxide, and zinc is not as active as magnesium, so it is more difficult to react with carbon dioxide. But it's still good to be welded in an argon arc! Blind sedan chair.

The matters that need to be paid attention to when welding the galvanized sheet spot welding machine are as follows: 1There should be no oil stain on the surface of the welded product.

2.The material of the welding joint must be alumina copper.

3.When the welding head sticks to the product, the mold needs to be repaired in time and cannot be used anymore 4The spot welding machine needs to be equipped with a cooling water tank to cool the welding head and the welding effect is perfect.

Answer the welding precautions 1. Adjust the position of the electrode rod before welding, and the electrode should be able to press the weldment; 2. Turn on the cooling water first, and then turn on the power supply, you can prepare for welding, and the weldment should be placed between the electrodes; 3. Before welding the galvanized sheet spot welding machine, the weldment should be cleaned, and the welding place should not be dirty, oxide scale, etc., otherwise it will affect the welding quality and service life of the welding machine;

The surface of the galvanized sheet is electroplated with a layer of zinc layer, so the welding is generally welded in a two-stage discharge way, specifically the first section adopts a small current soft specification method, the zinc layer on the surface of the plate is melted and squeezed out, revealing the base metal inside, and the second section is then welded with a larger current, and the pressure of the cylinder is also greater than the welding pressure of the iron plate of the same specification.

Roughly the following points:1The surface pants of welding products are resistant to oil stains 2

The material of the welding joint shall be alumina copper 3When the welding head sticks to the product, the key is pure and needs to be repaired in time, and it cannot be used anymore 4The spot welding machine needs to be equipped with a cooling water tank to cool the welding head and make the welding effect perfect.

Kiss, <>

We're glad to answer your questions! The surface of galvanized sheet and iron plate spot welding machine spot welding galvanized sheet is electroplated with a layer of zinc layer, so the welding is generally welded by two-stage discharge, specifically the first section adopts the method of small current soft specification, the zinc layer on the surface of the plate is melted and squeezed out, revealing the base metal inside, and then the second section uses a larger current to weld the base metal, and the pressure of the cylinder is also greater than the welding pressure of the iron plate of the same specification. According to the different galvanizing processes, galvanized steel sheets can be roughly divided into three types: electro-galvanized steel plates, hot-dip galvanized steel plates and alloyed galvanized steel plates.

The existence of the galvanized layer makes the galvanized sheet have unique advantages in the anti-rust of the body, which makes it widely used in the production and manufacturing of the automobile industry, but it is also the surface zinc layer that makes it difficult to weld with spot welding machine: 1. Due to the existence of a zinc layer with low resistivity, low hardness and low melting point on the contact surface, the contact resistance is reduced, and the current field is unevenly distributed, which affects the formation and size of the molten core and clean potato; 2. Under the condition of ensuring satisfactory welding quality, the range of applicable welding parameters is small; Due to the low melting point of the zinc layer, the surface is easy to burn, and it is easy to react with the electrode cap to form brass, which in turn affects the conductivity of the electrode, resulting in too small output current, easy to overheat and deform, reduce the life of the electrode and affect the welding quality. 3. When the galvanized sheet is welded, because the zinc layer is non-conductive, it is easy to produce welding splashing during welding, which affects the stability of the quality of the solder joint; 4. In the spot welding process of galvanized steel plate, due to the unreasonable welding specification, the respondent will make some residual zinc in the joint, and the zinc-iron alloy may form fine cracks or pores in the process of nugging and crystallization, and when there is more residual zinc, it will also form a softened tissue, which will affect the quality of the solder joint.

Hope mine can help you! <>

How to use spot welding machine]:

1. When welding, the position of the electrode rod should be adjusted first, so that when the electrode is just pressed to the weldment, the electrode arms are kept parallel to each other.

2. The selection of the current regulation switch stage can be selected according to the thickness and material of the weldment. After powering on, the power indicator should be on, and the electrode pressure can be obtained by adjusting the spring pressure nut and changing its compression.

3. After completing the above adjustments, you can first turn on the cooling water and then turn on the power supply to prepare for welding. The procedure of the welding process: the weldment is placed between the two electrodes, the foot pedal is pressed, and the upper electrode is in contact with the weldment and pressurized, when the foot pedal is continued to be pressed, the power contact switch is turned on, so the transformer begins to work, the secondary circuit is energized to heat the weldment.

When the foot pedal is released after a certain period of welding, the electrode rises, and the power supply is cut off first and then restored to its original state by the tension of the spring, and the single-point welding process is over.

4. Preparation and assembly of weldments: steel weldments must be removed from all dirt, oil, oxide scale and rust before welding, and it is best to remove the oxide scale from the weld after pickling, sandblasting or grinding wheel for hot-rolled steel. Although the uncleaned weldments can be spot welded, it seriously reduces the service life of the electrode, and at the same time reduces the production efficiency and quality of spot welding.

For medium and low carbon steels with thin coatings, they can be welded directly.

Precautions]:

1. For on-site use, there should be a rain-proof, moisture-proof, and sun-proof shed, and corresponding fire-fighting equipment should be installed.

2. Within 10m of the welding site, flammable and explosive materials such as oil, wood, oxygen cylinders, acetylene generators and so on shall not be stacked.

3. Welding operators and cooperating personnel must wear labor protection equipment according to regulations. Safety measures must be taken to prevent accidents such as electric shock, falling from height, gas poisoning, and fire.

4. The copper plate connecting the secondary tap should be compressed, and the binding post should have a washer. Before closing, the wiring nuts, bolts and other components should be inspected in detail and confirmed to be intact and not loose or damaged. There are protective covers at the binding posts.

5. Before use, check and confirm that the wiring of the primary and secondary wires is correct, the input voltage conforms to the nameplate regulations of the welding machine, and the type and scope of application of the welding current of the spot welding machine are known. After the power is turned on, it is strictly forbidden to touch the live part of the primary line. The primary and secondary wiring must be equipped with protective covers.

6. When moving the spot welding machine, the power supply should be cut off, and the welding machine should not be moved by dragging the cable. When there is a sudden power failure during welding, the power supply should be cut off immediately.

7. When welding copper, aluminum, zinc, tin, lead and other non-ferrous metals, it must be carried out in a well-ventilated place, and the welding personnel should wear gas masks or respiratory filters.

8. When multiple spot welding machines are used in a centralized manner, they should be tapped-off on the three-phase power supply network to make the three-phase load balanced. The grounding devices of multiple welding machines should be connected by the grounding electrodes respectively, and should not be connected in series.

9. It is strictly forbidden to weld on the pressure pipeline, container containing flammable and explosive materials and stressed components in operation.

10. When welding the preheating parts, a baffle should be set up to isolate the radiant heat emitted by the preheating weldments.

1. First supply air to ensure that the gas path is normal and the electrode is in situ, and then send water to check that the thyristor, transformer, secondary circuit, and electrode are not leaking, and the cooling is normal, and then the power is sent, and the procedure is over.

2. Determine the pressure, stroke, starting mode, speed, and controller parameters.

3 The indicator light and alarm light indicate that they are normal.

4. No welding test run, welding operation, inspection.

5. Work: Pay attention to sound, nugget, spatter, speed, heat, stability, and reflect in time when there is a failure.

The thing you need to pay attention to when welding this welding machine is not to raise the voltage too high, so that the temperature will be very high, and then keep the distance.

Galvanized full point should also pay attention to welding when welding, one is the connection of the circuit, do not short circuit, resulting in the second, but pay attention to safety issues, and the third should pay attention to protect their eyes.