100kVA Nut Spot Projection Welding Machine for Thin Sheet Metal

Product Overview

This stationary spot and projection welder is engineered specifically for joining thin-gauge metal panels—typically 2mm and under—to stainless steel or copper fasteners such as nuts and bolts. Widely adopted in automotive component fabrication and precision metalworking, the machine delivers consistent nugget formation with minimal thermal distortion, making it a reliable choice for quality-critical production environments.

Flexible by design, the unit operates as a manual foot-switch-activated spot welder for high-mix small batches and integrates smoothly into CNC-driven automated cells for high-throughput runs. Its dual-mode capability, combined with a 100kVA rated power and 18kA maximum short-circuit current at 50% duty cycle, provides the headroom needed for demanding nut-to-sheet projection welding tasks while keeping cycle times predictable and repeatable.

Key Technical Advantages

Controlled Heat Input Preserves Thin-Sheet Integrity

Welding cycles are fine-tuned for sub-2mm stock, delivering concentrated energy that reduces burn-through and distortion. This precision translates into clean weld faces and fewer post-weld rework operations on exposed panels and brackets.

Manual-to-CNC Operational Flexibility

Operators can toggle between foot-switch-controlled manual welding for prototype or repair work and standardized signal interfacing that supports integration into robotic or PLC-driven lines. This adaptability protects your investment as production volumes evolve.

Fast-Pneumatic Electrode Response

A direct-acting solenoid valve accelerates electrode head travel, shortening the weld cycle. An air reservoir stabilizes pressure output, while adjustable upper and lower strokes accommodate varying nut and boss heights without tooling changes.

Water-Cooled Thyristor Main Circuit

A fully water-cooled high-power thyristor module maintains steady secondary output even during extended duty periods. The upper-insulated secondary circuit enhances operator safety and simplifies installation, while copper and stainless steel waterways include a visual flow indicator for instant coolant checks.

Rigid Build Supports Sustained Output

With a throat depth of 630mm, electrode force up to 10,000N, and a 40mm working stroke, the DTN-100 frame absorbs repeated clamping loads without flex. Cushioned head travel lowers mechanical noise and extends tooling life, supporting round-the-clock schedules with limited maintenance pauses.

Applications

Working Principle

Technical Specifications

After-Sales and Support

• 12-Month Warranty — Full coverage on machine components and core electrical parts for one year from shipment date.
• Technical Documentation — Machinery test report, operation manual, wiring diagrams, and maintenance checklist provided with each unit.
• Overseas Commissioning Support — Remote video guidance for installation and trial runs; on-site engineering visits available upon request.
• Spare Parts Availability — Electrode tips, arms, water hoses, and thyristor modules kept in stock for fast replacement dispatch.

Frequently Asked Questions

What sheet thickness range is this welder optimized for?

The DTN-100 is specifically tuned for thin sheet work from 0.5mm up to 4.5mm (A3 steel combined thickness), with best results when welding fasteners onto stock of 2mm or less. For thicker sections, consider the DTN-125 or DTN-160 models from the same series.

Can this machine be integrated into an automated production line?

Yes. The machine exposes standard control signal interfaces and a stable mechanical mounting frame, allowing straightforward integration with CNC positioning tables, robots, or PLC-based cells. Manual foot-switch mode remains available for standalone operation.

What materials can be welded with this unit?

It handles low-carbon steel, stainless steel, aluminum alloy, and non-ferrous sheets when paired with compatible nut or bolt materials such as carbon steel, stainless, or copper. For aluminum-intensive jobs, we recommend confirming duty-cycle requirements with our engineers.

How does the cooling system prevent overheating during long runs?

A water-cooled thyristor module and copper/stainless steel waterways dissipate heat efficiently. The built-in visual flow indicator lets operators confirm coolant circulation at a glance, while the recommended 8 L/min feed rate keeps duty cycles stable.

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