What are the workflow steps of an intermediate frequency spot welder?

Shanghai Jiahu welding is suitable for point (convex) welding of aluminum alloy plate, galvanized sheet, low carbon steel plate and stainless steel plate; A special fixture is installed on the projection welding workbench to weld various special-shaped parts; It is widely used in aviation, aerospace, automotive, electrical and chemical industries. The main welding materials of the intermediate frequency spot welding machine: stainless steel or cold-rolled plate, aluminum plate, galvanized plate, cold-rolled plate, etc.

Medium frequency spot welding machine preparation before welding.

1. Before the task, it is necessary to clean the oil stains and dirt of the upper and lower electrodes. Energize and check whether there is leakage in electrical equipment, operating mechanism, cooling fragments, gas path fragments and body shell.

2. The indoor temperature should not be lower than 15.

3. Before starting, first turn on the control line transfer switch and the small welding current switch, insert the gate knife position of the pole number conditioning switch, connect the water source and gas source, and connect the conditioning knobs on the control box. The electrode contacts are always bright.

4. The intermediate frequency spot welding machine controlled by the pneumatic pedal should reflect that the pipeline is free of air leakage and impurity blockage.

Precautions in the welding of medium frequency spot welding machine.

1. During the task of the welding machine, the gas path and water are cooled and dredged piecemeal. The gas should not contain water. The drainage temperature does not exceed 40, and the flow rate is regulated according to the rules.

2. The piston and lining ring of the bearing hinge and cylinder should be smooth in life.

3. The task stroke conditioning nut (above the cylinder block) of the upper electrode must be tightened. The electrode pressure can be adjusted according to the requirements of the welding standard by rotating the handle of the pressure reducing valve.

4. It is strictly forbidden to increase the fuse in the ignition circuit to prevent damage to the ignition tube and silicon rectifier. When the load is too small and the arc in the ignition tube cannot occur, it is strictly forbidden to close the ignition circuit of the control box.

Things to keep in mind after welding.

1. When the intermediate frequency spot welding machine aborts the task, the power supply and gas source should be cut off first, the water source should be closed initially, and the debris and welding slag splash should be removed.

2. The welding machine is temporarily out of service, and the unpainted active parts 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 task control box should not be less than 5min.

Hello, before using the intermediate frequency spot welding machine, be sure to check the various circuit parts of the welding machine to avoid poor welding. Secondly, before the formal welding, it is necessary to take a few workpieces for test welding, adjust the neat parameters, and the test welding can be officially welded only after passing the test welding.

It is essential to make some preparations for cleaning before welding, and there are often foreign bodies on the surface of the upper and lower electrodes, such as oil stains and other impurities, which requires us to clean frequently.

Maybe in life, this is an inconspicuous little thing, but it may be this inconspicuous cleaning work, if it is not done well, it will have a great impact on the welding quality of the spot welding machine, the cleaning operation is very easy, but we need to do it for a long time.

Power-on check is a necessary working step for us in the use of the intermediate frequency spot welding machine, which is an important part of the use of the spot welding machine, sometimes the electrical equipment may have the phenomenon of exposed electricity, of course, our gas system may also have leakage, so it is necessary for us to do a good job before the welding work begins, so as to ensure the safety of production.

Technical advantages of medium frequency inverter spot welding machine.

Comparison with other types of spot welding machinesComparison with other types of spot welding machines.

1. Comparison with AC spot welding machine.

1. Welding qualityWelding quality.

The adjustment cycle of AC spot welding machine is longer, and the adjustment resolution of welding time is 20ms20ms for the power grid of 50Hz. The time adjustment resolution of the medium frequency inverter spot welding machine can reach the inverter frequency, the inverter frequency), the control accuracy is high, the control accuracy is high, and the control accuracy is high. The response speed of the feedback control of the inverter welding machine is significantly accelerated, the response speed of the feedback control is significantly accelerated, and the output stability is good.

AC spot welding machine due to the influence of current cross-crossing due to the influence of current cross-ing, low thermal efficiency, low thermal efficiency, use thyristor to adjust the current thristor to adjust the current, when the current percentage is small, when the current percentage is small, the zero-crossing time is long, the zero-crossing time is long, and the impact is greater; The output current of the intermediate frequency inverter spot welding machine is pulsating DC, the output current is pulsating DC, and it is continuous DC output under the action of loop inductance, which is continuous DC output under the action of loop inductance, with high thermal efficiency, high thermal efficiency, stable welding heat input, stable welding heat input, and stable welding heat input.

2. Welding speedWelding speed.

Due to the influence of current crossing, the heating time of AC spot welding machine is relatively long due to the influence of current crossing. The intermediate frequency inverter spot welding machine is DC output for DC output, heating is concentrated, heating is concentrated, welding time is shortened, welding time is shortened, and welding time is shortened.

3. Energy-saving effect: Energy-saving effect.

The AC spot welding machine works at 50Hz50Hz, the transformer loss is large, the transformer loss is large, the power factor of the welding machine is low, the factor is low, the loop loss is large, and the loop loss is large. The transformer of the intermediate frequency inverter spot welding machine works at a higher frequency frequency ((1khz1khz),) with very small loss, very small loss, DC output improves power factor, DC output improves power factor, and the energy saving effect is obvious.

4. Equipment volume and weightEquipment volume and weight.

The transformer core of the AC spot welding machine is larger, and the transformer core is larger, and it is set under the same power condition.

--Solve welding problems for youSolve welding problems for you.

The equipment is more bulky and heavy, the intermediate frequency inverter spot welding machine transformer is greatly reduced, the transformer is greatly reduced, the equipment is lighter, and the equipment is lighter.

Medium frequency spot welding machine (1000hz).

There are several distinct advantages:

1. Welding specifications.

2. Welding quality.

Due to the frequency up to 1000Hz, the secondary current output capacity is strong, and the waveform is straight, and the range of nucleus size stability is expanded. There is almost no spatter, and the current in the primary stage of welding increases naturally, and the surface of the solder joint is ***.

3. Adaptability.

It is suitable for welding of a variety of materials, such as aluminum alloy and aluminum and other materials with fast thermal conductivity and poor weldability. For the welding of galvanized sheet and ordinary multi-layer plate, the welding quality is much higher than that of the power frequency welding machine;

4. Transformer.

The transformer size is small and the input power is low;

5. Energy utilization.

Three-phase load balancing, power factor up to above, energy saving (according to the report of General Motors of the United States, intermediate frequency spot welding saves 4 cents per welding point compared with power frequency spot welding);

6. Utilization rate of auxiliary materials.

There is no obvious peak current and spatter, which shortens the welding time and has a long service life of the electrode; The efficiency is higher than that of AC, especially in some high-speed seam welding.

1. First of all, adjust the cylinder pressure to about the required pressure.

2. Estimate the welding heat according to the workpiece, and set it to a smaller value first.

3. When welding, gradually increase the parameter value from small standard welding to be able to weld, observe no spark spatter, and adjust to the satisfactory welding effect by changing the welding pressure.

4. For the welded workpiece, a destructive test (tensile strength or tear test) should be carried out.

5. Even if the welding conditions have been adjusted to large, the desired effect cannot be achieved, it means that the power of the model you selected is insufficient and you need to use a larger power model for welding.

Because no one can guarantee that the replaced parts will be 100% easy to use after changing the driver board, it is necessary to debug it.

Precautions for welding of medium frequency spot welding machine.

1.The position of the electrode rod should be adjusted before welding, and the electrode should be able to press the weldment just right;

2.The size of the current can be selected according to the thickness and material of the weldment;

3.Turn on the cooling water first, then turn on the power supply, then dial the welding state to the test welding state, make sure that the weldment is placed between the electrodes, and then you can dial the welding status to automatic, and you can weld.

4.Before welding in the intermediate frequency spot welding machine, the weldment should be cleaned, and there should be no dirt and oxide scale between the electrodes, otherwise the welding quality and service life will be affected;

5.The higher the metal conductivity, the greater the welding current density of the intermediate frequency spot welding machine, so the welding time should be shortened. This aspect also needs our attention and cannot be taken lightly.

Second, the precautions after welding.

1. When stopping work, the power supply and air source should be cut off first, and finally the water source should be turned off to remove debris and welding slag splash.

2. If it is out of use for a long time, the unpainted active parts 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.

Features of medium frequency inverter spot welding machine:

1. Using digital intermediate frequency welding controller, the welding quality can be effectively controlled.

2. The spatter in the welding process is greatly reduced, the welding quality is improved and the welding environment is purified.

3. It can be equipped with a suspension welding machine and an integrated welding tong.

4. Powerful welding function, providing welding quality analysis data and monitoring 5. Integrated modular design, stable performance, high reliability and low welding failure rate of welding control system.

6. The use of electrode pressure is reduced, and the life of the electrode is greatly improved.

7. Three-phase balanced load and intermediate frequency welding technology are adopted, and there is no need to add capacitance compensation cabinets.

8. Digitally controlled intermediate frequency welding, energy saving of more than 35%, greatly reducing energy costs.

9. Precise control of welding parameters (1ms) can perfectly weld multi-layer steel plates with variable thickness than steel plates, high-strength steel plates and aluminum alloys.

10. The ultra-small size and weight of the welding transformer meet the application of robots and integrated welding tongs.

11. HMI control, humanized operation and programming software, convenient and fast.

12. Powerful protection alarm function and intelligent module, with current display, welding parameter monitoring, over-temperature, over-current and overload protection function and grinding alarm function.

Each equipment has its own characteristics, but the place is different, or the characteristics, what kind of advantages can it bring us, or the role, these are very critical, Suzhou Anjia intermediate frequency spot welding machine is the same, so the characteristics of the intermediate frequency spot welding machine are reflected in which details?

1. Operating costs:

Reduced thermal and mechanical stress on the electrode, no current peaks, no interactive magnetic field, and 30%-50% increase in electrode life. Higher equipment efficiency, welder transformer is more efficient, there is no secondary circuit reactance loss, and the electricity cost is saved by 20%-40%.

2. Investment cost:

Energy saving of 20%-40%, current consumption per phase is less than times, thinner cable 1 3, reduce the power of the power supply, reduce the electrical investment of infrastructure. Three-phase balanced input, no pollution to the power grid, no need for compensation and filtering equipment, the weight and size of the welder transformer are reduced by 60%.

3. Quality cost:

The precise adjustment of the welding parameters of the welding machine, dynamic adjustment (20 times that of the AC controller), adaptive adjustment to obtain better solder joint quality, no material overheating and less spatter, no need to clean up after welding, saving time and effort.

Hello, the characteristics of the intermediate frequency spot welding machine are mainly reflected in the high working efficiency, the welding effect is better, and it is also more cost-saving.

The welding conditions of Suzhou Anjia intermediate frequency spot welding machine are usually three categories: (welding current, energizing time, electrode pressure), in welding, there is a close relationship between them, and these play a decisive role, that is, welding quality, the following, take overlapping welding as an example, analyze different welding condition specifications.

For friends who have just come into contact with welding, they may not know much about welding current, it refers to the current flowing to the welding base metal in the secondary circuit of the transformer in the machine, in the ordinary single-phase AC machine, the current flowing on the primary side of the transformer will be multiplied by the ratio of the transformer line turns (refers to the ratio of the number of turns on the primary side N1 and the line turns N2 on the secondary side, and N1 N2) and then flows to the secondary side.

When the appropriate amount of current is turned on within the appropriate time frame under the appropriate electrode pressure, a common fusion part will be formed between the bonded base metals, and a joint part (nugget) will be formed after cooling, but if the current is too large, the fusion part will splash out (spatter) and the electrode will stick to the base metal (deposition), and in addition, the welding part will be deformed too much.

The power-on time refers to the time when the welding current is turned on, changing the power-on time in the case of a fixed value of the current, will lead to the highest temperature that the welding part can achieve is different, resulting in the size of the joint part formed, normally speaking, the selection of low current value, prolonging the power-on time will not only cause a large amount of heat loss, but also lead to the heating of the unwanted place, especially for the aluminum alloy and other workpieces with good thermal conductivity when welding with small parts, in the shortest time to use a larger welding current.

The electrode pressure is said to be the pressure on the welding base metal, the main functions of the electrode are: to the workpiece to conduct current, to the workpiece to transmit pressure and quickly dissipate the heat in the welding area, it also has the effect of forging after cooling and to prevent internal cracking, when setting the electrode pressure, sometimes it will be pre-loaded before the power-on, depressurized during the power-on process, and then pressurized again at the end of the power-on.