Stationary 150KVA AC Projection Welder Multi Point Spot Resistance Welding Machine for Fuel Tank

Video Demonstration

Product Overview

This stationary AC projection welder is purpose-built for high-volume welding of metal rings onto fuel tank filler necks. By synchronously energizing seven fixed convex points, the machine produces seven consistent weld nuggets in a single cycle, delivering both speed and repeatability for demanding production lines.

Designed for manufacturers seeking a dependable, low-operator-skill solution, the unit supports automatic welding cycles with manual load/unload only. Its quick-change annular electrode system accommodates various tank diameters, while forced water cooling and multi-level electrical protection sustain stable output during continuous operation—an economical upgrade for fuel tank production capabilities.

Key Technical Advantages

Simultaneous 7-Point Welding

Upper and lower electrodes press the metal ring against the tank shell, energizing seven fixed projections at once. This creates seven uniform welds per cycle, reducing cycle time and improving joint consistency compared to single-point methods.

Quick-Change Annular Electrode

The one-piece annular electrode ring can be swapped rapidly to suit different fuel tank orifice diameters. One machine handles multiple product specifications, blending the throughput of dedicated tooling with the flexibility of general-purpose equipment.

Fully Automatic Welding Cycle

Once parts are loaded, the welding sequence runs automatically with standardized output. This lowers the operator skill barrier and maintains batch-to-batch consistency without dependence on experienced welders.

Forced Water Cooling System

An internal forced-water cooling circuit keeps electrode and transformer temperatures stable during sustained full-load operation, extending electrode life and preserving welding energy output over long shifts.

Dedicated Gas Storage Tank

A built-in gas reservoir minimizes welding pressure fluctuation, ensuring a stable electrode force through every cycle. This contributes to consistent weld penetration and reduced spatter.

Applications

Working Principle

Technical Specifications

After-Sales and Support

• Warranty — 12-month warranty on core components (excluding consumables such as electrodes).
• Technical Support — Remote video guidance and online troubleshooting available during business hours.
• Spare Parts & Response — Rapid dispatch of common spare parts; on-site assistance can be arranged when required.
• Usage Guide — Complete set of training videos, operation manual, and maintenance instructions included with delivery.
• Installation & Commissioning — Field installation, commissioning, and operator training available upon request.

Frequently Asked Questions

What materials can this projection welder handle?

The machine is designed primarily for mild steel (A3) fuel tank shells and metal rings. With appropriate electrode and parameter adjustment, it can also weld aluminum and stainless steel components on a case-by-case basis.

How many weld points are produced per cycle?

Each cycle produces seven weld points simultaneously, thanks to the fixed convex point annular electrode assembly. The upper and lower electrodes press together and energize all seven projections in one operation.

Can the electrode ring be changed for different tank diameters?

Yes. The annular electrode ring features an overall quick-change design, allowing operators to swap rings to accommodate different fuel tank orifice sizes. This gives one machine the ability to handle multiple product specifications.

What cooling requirement does the machine have?

Forced water cooling is mandatory for continuous operation. Cooling water consumption ranges from 6 to 10 L/min at 2.5 bar depending on the model, ensuring stable thermal performance during full-load production.

Do you provide sample welding tests before purchase?

Yes. We offer free sample welding and process design services to validate the solution with actual workpieces. Contact our engineering team with your drawings and material samples to arrange a test.

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