CO2 MIG Welding Machine

Overview

The NB-500 is a fully digital, DSP-controlled CO2 MIG welding machine from Gongda (China Rebar Machinery, chinarebarmachinery.com), designed for heavy fabrication welding in rebar processing and structural steel production. With a 500 A output and full digital control architecture, it delivers stable arc performance for continuous, high-duty industrial work. Gongda is based in Hefei, Anhui, China, with a factory rooted in the electromechanical works of Hefei University of Technology, and exports rebar processing machinery worldwide.

Key Specifications Explained

• Control method: Full digital DSP chip control for precise, repeatable welding parameters.
• Input power: 3-phase 380V ±20% (300–560V), 50–60 Hz, 24 KVA input capacity — wide voltage tolerance suits unstable grid conditions on site.
• Efficiency and power factor: 90% efficiency and 0.93 power factor reduce running costs.
• Output: Rated no-load voltage 75V; current range 30–500A; voltage range 12–45V.
• Duty cycle: 60% at 500A @ 40°C and 100% at 500A @ 25°C — rated for sustained heavy fabrication.
• Wire and materials: Welds carbon steel and stainless steel using solid wire, flux-cored wire, or electrodes; wire diameter Ø0.8–Ø1.6 mm.
• Welding sequences: No crater, with crater, repeated crater, and spot welding modes.
• Arc characteristics: Adjustable from −10 to +10 for fine arc tuning.
• Wire feed speed: 1.4–21 m/min.
• Cooling and protection: Forced air cooling; insulation class H; IP23S protection; ambient operating range −10°C to +50°C.

Applications

The NB-500 suits heavy fabrication welding where thick sections and long weld runs are standard: rebar processing plants, rebar cage and mesh production, structural steel fabrication, construction equipment manufacturing, and general metalworking workshops. Its ability to run solid wire, flux-cored wire, and electrodes on carbon and stainless steel gives buyers one machine for multiple jobs, reducing equipment count on the shop floor.

Why Buy This Model from Gongda

• Digital DSP control for consistent arc quality across long production shifts.
• 500A output with 100% duty cycle at 25°C for continuous heavy fabrication.
• Wide input tolerance (300–560V) for reliable operation in regions with variable power supply.
• Multi-process capability — MIG with solid or flux-cored wire plus electrode welding.
• H-class insulation and IP23S protection for demanding industrial environments.
• Factory heritage linked to the electromechanical works of Hefei University of Technology.

Shipping, Certification & Support

Gongda exports rebar processing machines worldwide, including Russia, Spain, Latin America, the Middle East, Southeast Asia, and Africa. EAC certification is available for buyers in Eurasian Economic Union markets. Shipment is arranged FOB Shanghai, Ningbo, or Qingdao. Every machine carries a 12-month warranty with spare parts support. Sales and technical support are available in English, Russian, Spanish, Arabic, French, Portuguese, German, and Indonesian. For specifications, pricing, or order details, contact WhatsApp +86 193 9277 7259 or visit chinarebarmachinery.com.