200 KVA DC Resistance Spot Welder Copper Wire Welding Machine 380V

Video Demonstration

Product Overview

The 200 KVA DC Resistance Spot Welder is a heavy-duty stationary spot and projection welding machine engineered for high-efficiency copper wire welding and sheet metal joining. Combining MFDC (Medium Frequency Direct Current) technology with a rigid press-frame structure, this resistance spot welding equipment delivers precise, repeatable weld nuggets on low-carbon steel, stainless steel, coated steel, and non-ferrous metals including copper wire, sheets, and pipes. Designed for continuous industrial production, the machine offers 100-250 KVA rated capacity options to match diverse manufacturing requirements.

Built by ChengDu Xinweihan, a specialized Chinese welding equipment manufacturer with a 20,000 sq.m facility and an R&D team of over 20 engineers, this copper spot welder is field-proven in automotive manufacturing, hardware fabrication, and household appliance production. The stationary design keeps the workpiece mobile for flexible positioning, while the integrated air and water pressure monitoring ensures safe, stable operation across extended duty cycles. With dedicated overseas technical service teams in Southeast Asia and South America, the machine is supported globally for installation, commissioning, and maintenance.

Key Technical Advantages

High-Frequency MFDC Power Delivery

The fully water-cooled resistance welding transformer and rectifier provide strong, stable output power with rapid capacitive charge/discharge cycles. This delivers fast welding speed and short welding time, raising production throughput per shift while keeping energy consumption lower than traditional AC welders.

Rigid Frame With Precision Electrode Guidance

The machine adopts a unique tree-style body with multiple internal reinforcing ribs, engineered for impact resistance, shock absorption, and high rigidity. The upper electrode moves vertically in a linear guide with high repeat positioning accuracy, minimizing weld deformation and ensuring every spot is placed exactly where specified.

Accurate Pneumatic Pressure Control

A combination aluminum alloy cylinder with a pilot high-flow electromagnetic directional valve achieves fast response and sensitive follow-up, while an optional electrical proportional valve enables precise adjustment of welding pressure. This lowers pressure impact on workpieces, reduces noise, and maintains consistent weld strength across high-volume runs.

Integrated Safety and Cooling Protection

The secondary circuit uses a pressurized cylinder seat and upper arm insulation for safe operation on the lower seat without short-circuit risk. Built-in air and water pressure switches with alarms prevent water shortage or gas welding issues, protecting equipment integrity and reducing unplanned downtime.

Convenient Foot-Switch Operation

Foot-switch control matches operator habits, reduces labor intensity, and accelerates the welding cycle. This allows a single operator to manage continuous production tasks with high efficiency and lower fatigue over long shifts.

Applications

Working Principle

Technical Specifications

After-Sales and Support

• 1-Year Warranty — Full warranty covering manufacturing defects on all machine components for 12 months from commissioning date.
• Field Installation & Training — On-site installation, commissioning, and operator training provided by our technical team to ensure smooth production startup.
• Free Spare Parts — Initial spare parts kit included with every machine to cover routine wear items and reduce downtime.
• After Warranty Service — Continued video technical support, online troubleshooting, and spare parts supply available beyond the warranty period.
• Overseas Technical Team — Dedicated service teams in Southeast Asia and South America provide on-site maintenance; contact us to confirm availability in your country.

Frequently Asked Questions

What materials can this resistance spot welding equipment handle?

This stationary spot welder is designed for low-carbon steel, stainless steel, coated steel, and non-ferrous metals, including copper wire, sheet, and pipe. It supports plate-to-plate welding, projection welding of nuts and bolts, and specialized copper wire welding applications.

What is the maximum welding thickness capacity?

The DN(B)-200 model offers a maximum welding capacity of 5.0+5.0 mm for steel sheets, while the DN(B)-250 model reaches 6.0+6.0 mm. The machine is also optimized for copper wire welding per customer-specific requirements.

What power supply is required for operation?

The machine operates on three-phase AC 380V primary power, which is standard for industrial facilities. It is available in 100 KVA, 160 KVA, 200 KVA, and 250 KVA rated capacity configurations to match your production load requirements.

Can the welding pressure be adjusted for different applications?

Yes, the machine is equipped with an electrical proportional valve that allows precise adjustment of welding pressure. The auxiliary cylinder on the upper electrode also enables convenient and accurate stroke adjustment, giving you full control over different workpiece thicknesses and materials.

What after-sales support is available internationally?

We provide a 1-year warranty, free initial spare parts, field installation, commissioning, and operator training. Our overseas technical service teams in Southeast Asia and South America offer on-site maintenance. After the warranty period, video technical support, online assistance, and spare parts supply continue to be available.

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