Product Specification

Resistance Spot Welding Machine 2mm Sheet Metal Nut Welder CNC Manual

Product Overview

This stationary spot and projection welding machine delivers a precise, production-ready solution for fastening stainless steel or copper nuts and bolts onto thin sheets as delicate as 2mm. Built for the automotive, appliance, and hardware sectors, the unit operates either as a dependable manual foot-switch spot welder or integrates directly into CNC-automated work cells for repeatable, unattended joining cycles. By concentrating heat input into a controlled weld zone, it minimizes sheet distortion and burn-through, producing clean, structurally sound joints on low-carbon steel, stainless steel, and aluminum alloy workpieces.

Engineered for production managers and facility buyers who prioritize joint consistency and minimal rework, the machine pairs a rigid welded frame with a pneumatically driven upper electrode and a fast-acting solenoid valve. This design accelerates head response, stabilizes output pressure, and shortens cycle times across mixed-batch orders. Available in four power ratings up to 250 KVA, the platform scales from light-gauge nut attachment to heavier projection welding tasks, while every model shares a common footprint that simplifies line integration, operator training, and spare-part stocking.

Key Technical Advantages

Thin-Sheet Joining with Controlled Distortion

Weld parameters are intentionally tuned for 2mm and thinner gauge metals, delivering a concentrated, repeatable heat profile. The result is a reduced risk of panel warping and burn-through, allowing operators to achieve clean, cosmetically acceptable weld points on automotive body panels and precision hardware without secondary finishing.

Dual Manual and CNC-Readiness

Standard foot-pedal control supports flexible, high-mix production, while the stable mechanical interface and electrical control signals make the unit readily adaptable to automated lines. Factories moving toward Industry 4.0 can progressively integrate this welder into robotic stations without replacing the core power source.

Precision Pneumatic Pressure and Adjustable Stroke

An air reservoir smooths pressure delivery, and the upper electrode provides independent adjustment of working and auxiliary strokes. The lower electrode can be raised or lowered vertically for rapid tooling changes, letting you switch between nut sizes, bolt lengths, and sheet stacks in minutes rather than hours.

Responsive Actuation with Water-Cooled Power Core

A direct-acting solenoid valve boosts electrode speed and cycle response, while the main circuit relies on a fully water-cooled, high-power thyristor module for steady output. The upper-insulated secondary circuit enhances operator safety, reduces maintenance complexity, and simplifies installation within confined production floors.

Service-Friendly Cooling and Long Service Life

Copper and stainless steel waterway components resist corrosion and scale build-up, and a visible flow indicator lets technicians confirm coolant circulation at a glance. Adjustable pressure head speed cushions impact, lowers operating noise, and uplifts longevity—even under continuous multi-shift schedules.

Applications

Working Principle

Technical Specifications

After-Sales and Support

• 12-Month Warranty — Covers manufacturing defects and premature component failure under specified operating conditions
• Free Spare Parts Package — Ships with commonly replaced consumables to reduce unplanned downtime
• Field Installation and Commissioning — Factory-trained technicians handle setup, alignment, and initial operator briefing
• Remote Video and Online Support — Engineers provide real-time troubleshooting through video calls and detailed spare-parts guidance

Frequently Asked Questions

What sheet thickness range can this welder handle consistently?

Standard welding capacity spans from 3.0+3.0 mm up to 6.0+6.0 mm depending on the selected model, making it especially reliable for 2mm automotive-grade sheet metal. Thinner gauge materials benefit from the concentrated heat input that reduces deformation risks during nut or stud attachment.

Can this welder be connected to existing CNC production lines?

Yes. It operates as a manual machine with foot-switch control and also provides the electrical interface and mechanical mounting points needed for robotic or PLC-based automation, allowing phased integration without replacing the entire station.

How long does it take to change tooling between nut sizes?

The vertically adjustable lower electrode plus tooling for the upper electrode typically requires less than 15 minutes for a trained operator. Small-batch runs and frequent job changes therefore remain economically viable.

What cooling circuit maintenance does this machine require?

The copper and stainless steel waterways are corrosion-resistant, but flow rate and coolant temperature should be checked weekly using the visual flow indicator. Regular checks on the water-cooled thyristor module help maintain long-term electrical stability.

Which materials are supported beyond carbon steel sheets?

Low-carbon steel, stainless steel, aluminum alloy, and other non-ferrous metals are all compatible, and copper or stainless steel weld nuts can be secured to these substrates. Parameter adjustments ensure clean bonds without overheating.

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