Product Specification

Resistance Multi Point Spot Welder For Fuel Tank 7 Head Projection Machine

Product Overview

This stationary projection spot welder is purpose-built for high-volume fuel tank production, joining a half-section tank shell with a metal ring in a single automated cycle. The operator simply loads the workpiece and presses start; the machine then executes downward pressure, welding current application, hold time, and electrode reset without further intervention, delivering consistent multi-point joints cycle after cycle.

Engineered around a fixed 7-head annular electrode arrangement, the unit forms seven weld points simultaneously on each stroke, significantly shortening takt time compared to sequential spot welding. With an ergonomic load height, tool-free electrode ring replacement, and a clear status panel, the system reduces operator fatigue and keeps routine maintenance straightforward — ideal for fuel tank workshops targeting higher throughput and repeatable weld quality.

Key Technical Advantages

Seven Weld Points In One Press Cycle

The upper and lower annular electrodes each carry seven fixed convex points. When the cylinders press together, current flows through all seven locations at once, creating seven joints per stroke and shortening production time per tank shell.

Self-Aligning Workpiece Fixturing

A locating fixture on the lower electrode platform positions the tank shell accurately, while the upper electrode ring magnetically holds the metal ring in place before welding. No repeated alignment or manual adjustment is required between cycles.

Aluminum Alloy Cylinder For Smooth Fast Pressing

The aluminum alloy cylinder barrel, combined with low-damping seals and a hydraulic damper, delivers rapid electrode movement with consistent pressure — supporting high cycle rates while maintaining joint uniformity.

Integrated Gas Storage Tank For Stable Force

A dedicated air reservoir minimizes welding pressure fluctuation, helping to keep electrode force steady during each weld and improving consistency across the full production shift.

Visual Water Flow Monitoring

All waterway components are surface-treated to prevent rust, with drainage routed independently to the tank. Operators can check coolant flow at a glance and clear any blockage before it affects welding performance.

User-Friendly Operation And Maintenance

Loading height follows ergonomic guidelines to avoid excessive bending, and the annular electrode ring can be swapped without special tools — reducing reliance on skilled maintenance staff for routine changes.

Applications

Working Principle

Technical Specifications

After-Sales and Support

• Warranty Coverage — Core components are covered for 12 months against manufacturing defects (consumable parts excluded).
• Technical Support — Remote video guidance and online troubleshooting provided throughout the machine service life.
• Spare Parts Availability — Rapid dispatch of commonly replaced parts to minimize downtime; on-site assistance arranged when necessary.
• Training And Documentation — Each unit ships with an operation manual, instruction guide, and training videos covering setup, adjustment, and daily maintenance.

Frequently Asked Questions

How many weld points can this machine produce in one cycle?

The 7-head annular electrode arrangement creates seven weld points simultaneously in a single press cycle, helping fuel tank producers cut cycle time versus single-point spot welding.

What materials can be welded with this projection welder?

The unit is suited for steel, copper, and aluminum workpieces. For fuel tank applications it is typically configured for joining a steel shell half with a metal ring, and the electrode set can be adapted to different tank specifications.

Is operator training required to run the machine?

The loading sequence is simple: place the ring on the upper electrode, set the shell on the lower fixture, and press start. Most new operators can become productive within a few minutes; training videos and manuals are included for reference.

Can the electrode ring be changed quickly between different fuel tank models?

Yes. The annular electrode ring mounts as a single assembly and is swapped without specialized tools, allowing quick changeover when production moves between different tank sizes or ring dimensions.

Does the machine automatically detect problems during welding?

The control panel includes status indicators for each stage of the cycle. If an abnormal condition is detected, the machine shuts down automatically and sounds an alarm, helping operators identify and resolve issues quickly.

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