DN100 Pneumatic Resistance Spot Projection Welding Machine for Fuel Tank

Product Overview

Engineered for high-volume fuel tank production, this DN100 pneumatic resistance spot and projection welding machine streamlines the joining of tank shells with metal rings. The unit replaces the conventional single-electrode approach with a full annular electrode ring assembly, enabling seven welds to be completed simultaneously in a single press cycle. This semi-automatic system is well suited for manufacturers producing fuel tanks across multiple diameters and wall thicknesses, delivering consistent joint quality while reducing cycle time per workpiece.

Built around a heavy-duty pneumatic press frame with an integrated gas storage tank, the machine maintains stable electrode force during each weld, minimizing splash and weld inconsistency. The controller stores multiple weld schedules, so operators can switch between different tank shell materials or thicknesses with one click. With dual spot and projection welding capability, this equipment also handles general resistance welding tasks beyond circular fuel tank rings, offering plant managers a flexible, production-ready solution.

Key Technical Advantages

Simultaneous 7-Point Annular Welding

Each annular electrode ring carries seven fixed convex points. When the upper and lower rings press together, power is applied at all seven locations at once, forming seven uniform weld nuggets in a single stroke. This design shortens cycle time and keeps the weld distribution even around the circumference.

Quick-Change Electrode Rings for Mixed Sizes

The upper and lower electrode rings attach through standardized quick-install interfaces. When switching from one tank diameter to another, the operator replaces the full ring assembly without recalibrating electrode alignment, preserving coaxiality and reducing changeover downtime.

Multi-Schedule Weld Parameter Storage

The controller retains multiple weld recipes, each with its own current, time, and pressure values. This allows quick process switching for different shell thicknesses or material combinations, keeping small-batch and multi-variety production economical.

Spot and Projection Welding in One Frame

Beyond annular fuel tank ring welding, the machine accepts interchangeable electrode forms for general projection and spot welding tasks. This dual-function design broadens the equipment’s process range and improves return on investment for job shops.

Stable Pneumatic Force with Gas Storage Tank

The dedicated gas storage tank buffers pressure fluctuations during the welding cycle, ensuring the electrode force remains steady from the first weld to the last. This contributes to repeatable nugget quality across long production runs.

Applications

Working Principle

Technical Specifications

After-Sales and Support

• One-Year Warranty — Core components of the spot welding machine are covered for 12 months from the date of shipment, excluding consumable wear parts.
• Online Technical Guidance — Our engineers provide remote troubleshooting, parameter tuning advice, and Q&A support via video or chat during your working hours.
• Spare Parts Availability — Commonly used spare parts are kept in stock for fast dispatch. On-site technical assistance can be arranged when critical issues arise.
• Operator Training Package — Each machine ships with training videos, an operation manual, and a maintenance guide to help your team get productive quickly.

Frequently Asked Questions

How do I switch between different fuel tank diameters?

Replace the annular electrode ring pair with the size matching the workpiece. The quick-install interface locks the ring in position without re-aligning individual electrodes. Then recall the corresponding weld schedule from the controller, and the machine is ready for the next batch.

Can this machine weld other parts besides fuel tank rings?

Yes. By swapping the annular electrode assembly for standard spot welding arms or a projection welding platen, the machine handles general resistance welding tasks such as nut projection, bracket spot welding, and sheet metal joining.

What is the recommended production cycle time?

For a typical fuel tank shell and metal ring assembly, each welding cycle can be completed in roughly 8 seconds, including manual loading and unloading. Actual cycle time depends on material thickness, electrode condition, and operator skill.

How is cooling water managed on this equipment?

All waterway components are surface-treated to resist rust. Cooling water flows through the electrode rings and returns to the tank. Operators can inspect the return flow to detect and clear any blockages early.

Do you provide sample welding before I place an order?

Yes. We offer free sample welding and process design services. Send us your workpiece drawings or physical samples, and our engineering team will validate the solution before you commit to production.

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