Pipe Pile Cage Welding Machine
High-Efficiency Automated Cage Production: Fully automatic CNC control enables fast, continuous welding with 3–4× manual productivity while reducing labor and material consumption.
Stable Resistance Welding Quality: DC resistance welding delivers uniform, high-strength joints with ≤5% strength loss, ensuring reliable cage performance and minimal spatter.
Flexible Multi-Specification Capability: Compatible with square and round pipe piles and multiple bar sizes, supporting precise preset pitch and length for diverse production needs.
Machine Overview
The Pipe Pile Rebar Cage Welding Machine is a fully automated manufacturing system developed for producing high-strength reinforcement cages used in concrete pipe piles. It delivers rapid forming performance with minimal weld strength reduction, supported by a well-engineered mechanical structure that simplifies upkeep. With integrated variable-frequency drive control and an intuitive human-machine interface, the system maintains stable, long-duration high-speed operation while consistently producing precision-quality cages.
Power System Options
Medium-frequency configuration
This configuration employs medium-frequency inverter technology to reduce energy consumption by over 30%. It ensures steady welding current output and consistent weld integrity, making it particularly suitable for precision-focused, high-capacity pipe pile production.
Power-frequency configuration
Built around a conventional industrial transformer, this option offers proven durability, dependable performance, and straightforward servicing. It represents a cost-effective solution for medium and smaller production environments.
Key Advantages
Dual-format capability — Handles both square and round pipe pile cages on a single platform, eliminating the need for separate equipment.
Enhanced resistance welding — DC heating technology enables fast thermal response, clean spatter-free joints, and weld strength loss controlled within 5%, surpassing traditional welding standards.
Precision CNC automation — PLC-based control paired with variable-frequency adjustment ensures accurate preset spiral spacing and cage length with minimal tolerance deviation.
High productivity efficiency — Achieves welding speeds up to 3000 mm/min, delivering three to four times the output of manual fabrication. Spiral reinforcement requires no overlap, reducing material consumption by roughly 1.5%, while operation can be managed by a small crew.
Reliable operation — Intelligent fault monitoring, touchscreen controls, and simplified training support continuous 24-hour production with minimal downtime.
Wide material adaptability — Compatible with various longitudinal and ring bar diameters, accommodating diverse pipe pile manufacturing requirements.
Typical Applications
Standardized cage fabrication for precast square and round pipe pile manufacturers
Infrastructure precast facilities supporting bridge, railway, highway, port, and marine foundation projects
Residential, commercial, and industrial foundation construction
Municipal engineering, including roadworks, underground pipeline systems, and wastewater facilities
On-site cage prefabrication for professional piling contractors
Hydraulic engineering projects such as embankments, reservoirs, and river management works
This equipment serves as a dependable, high-efficiency solution for standardized pipe pile cage production in modern infrastructure prefabrication.
Machine Structure
The Pipe Pile Rebar Cage Welding Machine consists of a coordinated assembly including the headstock unit, tail support frame, traveling carriage, steel bar holding platform, and integrated electrical control cabinet. Together, these components enable synchronized automated operation for accurate cage forming and welding.
| Component | Description | Notes |
Steel bar support table | Holds steel bars | Fabricated locally |
Welding drum | Mounts copper rings of equal diameter | Must be insulated from frame |
Welding mechanism | Press-welds spiral bars onto main bars | — |
Wire feeder | Feeds spiral reinforcement | Avoid overloading feeder reel |
Machine base | Structural mounting frame | Must remain insulated from tail frame |
Carriage | Pulls and advances main bars | — |
Tail frame | Guide rail support for carriage | — |
Technical Parameters
| Item | Specification |
Cage diameter | Ø300 / Ø400 / Ø500 / Ø600 mm |
Cage length | 7–15 m (extendable to 45 m) |
Number of longitudinal bars | 6, 7, 10, or customized |
Longitudinal bar diameter | Ø7.1 / Ø9.0 / Ø10.7 mm |
Spiral bar diameter | Ø4–Ø6 mm |
Spiral pitch | 0–100 mm |
Traction speed | Max 7500 mm/min |
Drive power | 8.4 kW |
Welding power | 300 kVA |
Main rotation speed | 0–80 rpm |
Welding method | Resistance welding |
Control mode | Automatic |
Welding material | Steel with carbon content <0.20% |
Strength loss at weld | ≤5% |
Weld tensile/shear strength | ≥200 kg |
Transformer cooling | Air/self cooling |
Power supply | 380V ±5%, 50 Hz |
Ambient temperature | −5°C to +35°C |
Relative humidity | <85% |
Machine weight | ≈5 tons |



