Medium Frequency Direct Current Spot Welder: Replacing Traditional Arc and Gas Welding with Faster, Stronger Connections
Spot welding is an efficient and reliable welding process that joins metal pieces by applying heat and pressure to the contact points. Known for its fast welding speed and strong, durable welds, spot welding eliminates the need for filler materials or flux. This process is highly adaptable to fluctuations in power supply, making it ideal for high-volume production environments.
Quick welding speeds and precise results without added materials.
Energy-efficient with reduced operational costs and shorter welding cycles.
Strong welds suitable for thin metals, including low-carbon steel and galvanized sheets.
Ideal for industries such as automotive manufacturing, electronics, and construction.
Spot welding is perfect for applications like high-strength steel welding, hot-formed steel welding, and resistance brazing in electrical components, offering a high-quality and cost-effective solution for your manufacturing needs.
The MFDC spot welder offers a more reliable welding process, especially in applications involving resistance welding. It uses DC welding for certain metals, which delivers better results compared to AC welding systems, ensuring stronger and more consistent welds.

Medium Frequency Dc Discharge Curve
The international advanced MFDC resistance welding technology and the full range of MFDC spot and projection welding machines.
| Main Specification | |
|---|---|
| Rated power(KVA) | 110 |
| Duty cycle(%) | 20 |
| Sec.voltage of transformer(V) | 12.5 |
| Diameter*stroke(mm) | Փ140*100 |
| Weld force(KN/0.5MPa) | 7.7 |
| Usage Requirements | |
| Power supplier | 380V/50Hz/3Ph |
| Max.primary current (A) | 100 |
| Specification of power cord(mm2) | 3*25+2*16 |
| Air pressure(MPa) | ≥0.6 |
| Specification of inlet joint | Փ13.5-G1/2 |
| Cooling water flux (L/min) | 8 |
| Pressure of the cooling water(MPa) | 0.15~0.3 |
| Specification of colling water inlet joint | Փ16.5-G1/2 |
A metal connection method that does not require welding materials

SPOT WELING

SPR

SELF CLINCHING

STUD WELDING

INSERTION
The medium frequency inverter spot welding machine offers numerous benefits, including 50% energy savings compared to conventional power frequency systems, fast welding speed, strong welds without the need for flux, and precise current control. It is also adaptable to power grid fluctuations, with low power consumption, reduced voltage distortion, and compact design. Additionally, it maintains high power factor (over 95%), improving efficiency and reducing operational costs.
This welding machine can effectively handle power grid fluctuations and voltage drops, thanks to the inverter’s ability to store and supply energy to the load. This ensures that the welding process remains stable and consistent, even when power conditions are not ideal.
Yes, this welding machine is highly versatile and suitable for welding a wide range of metals, including low-carbon steel, galvanized sheets, high-strength steel, hot-formed steel, as well as performing nut projection welding in automotive manufacturing and resistance brazing for copper wires in the electrical industry.
This machine reduces operational costs by improving energy efficiency, shortening welding cycles, and preventing damage to the thyristor system, which is common in traditional machines. This leads to energy savings and reduced maintenance costs, making it an ideal choice for large-scale, high-volume production environments.
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