Inverter Automatic Seam Welding Machine for Ammo Can

**Automated Dual-Head Variable-Frequency seam welder for Ammunition Boxes (Abridged)**

 

This automated dual-head variable-frequency seam welder is purpose‑built for fabricating metal ammunition containers. Operating as a precision *Resistance Welding Machine*, it uses controlled current and electrode force to generate continuous, gas‑tight fusion along full panel lengths—eliminating the leak paths common with intermittent joining methods.

 

The dual‑head arrangement welds two adjacent sides simultaneously, while a servo‑driven rotary table automatically indexes the fixture by 90° to complete the remaining edges—all in under 90 seconds per box, with no manual repositioning. Variable‑frequency inverter technology adjusts power in real time to compensate for thickness variations, ensuring uniform penetration, minimal spatter, and virtually no thermal distortion across all four seams.

 

Compared with a conventional *Spot Welding Machine*, which relies on overlapping discrete points that often require secondary sealing and grinding, this system produces a monolithic, hermetically sealed joint in one continuous pass—dramatically improving both airtightness and structural strength. The automated indexing guarantees identical heat input and electrode dwell time on every seam, delivering repeatability unattainable with manual or semi‑automatic setups.

 

Beyond weld quality, the machine offers significant productivity gains: dual heads double output without doubling floor space, and the adaptive frequency drive cuts electricity consumption by 30–40% versus fixed‑power resistance welders. Operator involvement is reduced to loading and unloading; all parameters are stored in digital recipes for quick changeovers between box sizes. Real‑time feedback on weld resistance maintains consistency as electrodes wear, ensuring 24/7 reliability in high‑volume production.

 

In essence, this system combines the seam integrity of a dedicated *Seam Welding Machine*, the heat control of a refined *resistance welding machine*, and the throughput far exceeding any *spot welding machine*—while saving energy and labor. The result is a warp‑free, leak‑proof ammunition box that meets military durability standards with Industry 4.0 efficiency, from factory floor to field deployment.

 

Features:

We will and we can customize the machine according to the Ammo can's specifications and user's requirement on machine! 
the price is different.

Constitute:
1, Machine body of thick steel sheet, not easy to deformation
2, PLC, servo control, accuracy and steady
3, Water cooling transformer: There is cooling water in inside, using full copper alloy core, reducing impedance, improving the utilization of power, 50% duty cycle to ensure the requirement of long time welding, big output power.
4, Fast solenoid valve, making welding speed faster, thereby the productivity is higher, therefore decreasing cost.
5, Cylinder adopt high accurate, anti-friction hard material, which is duralumin, without rust, lower friction, lower noise and loading is faster, thereby reducing the weld spatter.

It is special suitable for Ammo cans(ammunition boxes)

Product Parameters 

If the machine model is 200KVA,
1. box size: L450*W450*H280mm,max thickness 1.2mm iron steel plates                            
2.Power 200KVA, inverter model 1400A,                                          
3. Control model is PLC+Touch screen                                                    
4.Movement mode is Servo motors drive the welding heads to move          
5.Pressure mechanism is by Linear guaid rails                                          
6.Welding wheel's material is BeCu    
7.Demolding method: pneumatic cylinder ejection                                
8. Positioning method is by pneumatic                                            
9. Double wheel welds at same time