CNC Rebar 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 industrial solution designed for manufacturing high-strength concrete pipe pile reinforcement cages. The system offers fast forming efficiency with minimal welding strength reduction, a structurally optimized mechanical design, and user-friendly maintenance.
Equipped with variable-frequency drive technology and an advanced human-machine interface (HMI), the machine ensures stable, continuous high-speed operation while consistently delivering superior-quality rebar cages.
Power System Options
Medium-Frequency Version:
Adopts advanced medium-frequency inverter technology to reduce overall energy consumption by over 30%. It provides stable welding current output and uniform weld consistency, making it especially suitable for precision-driven, high-volume pipe pile production.
Key Advantages
Versatile Cage Production
The system is capable of manufacturing both square and circular pipe pile reinforcement cages, eliminating the need for additional equipment investment and increasing production flexibility.
High-Quality Resistance Welding
Utilizing advanced DC resistance welding technology, the machine delivers rapid heat response, clean and solid weld joints without spatter, and welding strength loss controlled within 5%. The welding performance significantly surpasses conventional welding methods.
Precision CNC Automation
Integrated PLC control and variable-frequency speed regulation ensure precise presetting of spiral pitch and cage length, maintaining minimal dimensional deviation and high production accuracy.
Improved Efficiency & Material Savings
The machine achieves welding speeds of up to 3000 mm/min — approximately three to four times faster than manual operation. Spiral reinforcement does not require overlapping, reducing material consumption by about 1.5%. The system can be efficiently operated by a small workforce, lowering overall labor costs.
Durable, Intelligent Design
Built for long-term industrial use, the equipment features intelligent fault detection, intuitive touchscreen operation, quick operator training, and dependable 24-hour continuous production capability.
Wide Rebar Compatibility
The system supports multiple rebar specifications, allowing processing of various longitudinal and ring bar diameters to meet diverse pipe pile reinforcement manufacturing requirements.
Typical Applications
This machine is designed for pipe pile manufacturers seeking standardized and efficient reinforcement cage fabrication for precast square and circular piles.
It is widely used in infrastructure precast plants producing rebar cages for bridges, railways, highways, ports, and marine foundation projects.
The system is also applicable to residential, commercial, and industrial building construction requiring reliable foundation pile reinforcement.
In municipal engineering, it supports projects such as road construction, underground utility networks, and wastewater treatment systems.
The equipment is particularly suitable for professional piling contractors who require on-site or near-site cage prefabrication.
Additionally, it serves hydraulic engineering applications, including reservoirs, embankments, river regulation works, and other water conservancy structures.
Overall, the machine provides an efficient, standardized, and high-quality solution for pipe pile reinforcement cage production in modern infrastructure prefabrication projects.
Machine Structure
The Pipe Pile Rebar Cage Welding Machine consists of a head assembly, tail frame, traveling carriage system, rebar support platform, and electrical control cabinet.
These core components operate in coordination to ensure precise alignment, stable welding performance, and fully automated, high-accuracy cage production.
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 |



